diff --git a/src/actor.h b/src/actor.h
index 564681917..516064477 100644
--- a/src/actor.h
+++ b/src/actor.h
@@ -415,24 +415,12 @@ enum ActorRenderFlag
 	RF_FORCEXYBILLBOARD		= 0x20000,	// [BB] OpenGL only: draw with xy axis billboard, i.e. unanchored (overrides gl_billboard_mode setting)
 };
 
-#define TRANSLUC25			(FRACUNIT/4)
-#define TRANSLUC33			(FRACUNIT/3)
-#define TRANSLUC50			(FRACUNIT/2)
-#define TRANSLUC66			((FRACUNIT*2)/3)
-#define TRANSLUC75			((FRACUNIT*3)/4)
-
-// <wingdi.h> also #defines OPAQUE
-#ifndef OPAQUE
-#define OPAQUE				(FRACUNIT)
-#endif
-
 // This translucency value produces the closest match to Heretic's TINTTAB.
 // ~40% of the value of the overlaid image shows through.
-#define HR_SHADOW			(0x6800)
-
+const double HR_SHADOW = (0x6800 / 65536.);
 // Hexen's TINTTAB is the same as Heretic's, just reversed.
-#define HX_SHADOW			(0x9800)
-#define HX_ALTSHADOW		(0x6800)
+const double HX_SHADOW = (0x9800 / 65536.);
+const double HX_ALTSHADOW = (0x6800 / 65536.);
 
 // This could easily be a bool but then it'd be much harder to find later. ;)
 enum replace_t
@@ -650,7 +638,7 @@ public:
 
 	// Called when an actor is to be reflected by a disc of repulsion.
 	// Returns true to continue normal blast processing.
-	virtual bool SpecialBlastHandling (AActor *source, fixed_t strength);
+	virtual bool SpecialBlastHandling (AActor *source, double strength);
 
 	// Called by RoughBlockCheck
 	bool IsOkayToAttack (AActor *target);
@@ -949,6 +937,7 @@ public:
 		}
 	}
 
+
 	DVector3 Vec2OffsetZ(double dx, double dy, double atz, bool absolute = false)
 	{
 		if (absolute)
@@ -973,6 +962,19 @@ public:
 		else return P_GetOffsetPosition(_f_X(), _f_Y(), FixedMul(length, finecosine[angle >> ANGLETOFINESHIFT]), FixedMul(length, finesine[angle >> ANGLETOFINESHIFT]));
 	}
 
+	DVector2 Vec2Angle(double length, DAngle angle, bool absolute = false)
+	{
+		if (absolute)
+		{
+			return{ X() + length * angle.Cos(), Y() + length * angle.Sin() };
+		}
+		else
+		{
+			fixedvec2 op = P_GetOffsetPosition(_f_X(), _f_Y(), FLOAT2FIXED(length*angle.Cos()), FLOAT2FIXED(length*angle.Sin()));
+			return{ FIXED2DBL(op.x), FIXED2DBL(op.y) };
+		}
+	}
+
 	fixedvec3 Vec3Offset(fixed_t dx, fixed_t dy, fixed_t dz, bool absolute = false)
 	{
 		if (absolute)
@@ -1001,6 +1003,11 @@ public:
 		}
 	}
 
+	DVector3 Vec3Offset(const DVector3 &ofs, bool absolute = false)
+	{
+		return Vec3Offset(ofs.X, ofs.Y, ofs.Z, absolute);
+	}
+
 	fixedvec3 _f_Vec3Angle(fixed_t length, angle_t angle, fixed_t dz, bool absolute = false)
 	{
 		if (absolute)
@@ -1047,6 +1054,10 @@ public:
 		SetOrigin(npos.x, npos.y, npos.z, moving);
 	}
 
+	void SetOrigin(double x, double y, double z, bool moving)
+	{
+		SetOrigin(FLOAT2FIXED(x), FLOAT2FIXED(y), FLOAT2FIXED(z), moving);
+	}
 	void SetOrigin(const DVector3 & npos, bool moving)
 	{
 		SetOrigin(FLOAT2FIXED(npos.X), FLOAT2FIXED(npos.Y), FLOAT2FIXED(npos.Z), moving);
@@ -1104,7 +1115,7 @@ public:
 	ActorRenderFlags	renderflags;		// Different rendering flags
 	FTextureID		picnum;				// Draw this instead of sprite if valid
 	DWORD			effects;			// [RH] see p_effect.h
-	fixed_t			alpha;
+	double			Alpha;				// Since P_CheckSight makes an alpha check this can't be a float. It has to be a double.
 	DWORD			fillcolor;			// Color to draw when STYLE_Shaded
 
 // interaction info
@@ -1264,13 +1275,19 @@ public:
 	FSoundIDNoInit WallBounceSound;
 	FSoundIDNoInit CrushPainSound;
 
-	fixed_t MaxDropOffHeight, MaxStepHeight;
+	fixed_t MaxDropOffHeight;
+	double MaxStepHeight;
+
+	fixed_t _f_MaxStepHeight()
+	{
+		return FLOAT2FIXED(MaxStepHeight);
+	}
 	SDWORD Mass;
 	SWORD PainChance;
 	int PainThreshold;
 	FNameNoInit DamageType;
 	FNameNoInit DamageTypeReceived;
-	fixed_t DamageFactor;
+	double DamageFactor;
 	fixed_t DamageMultiply;
 
 	FNameNoInit PainType;
@@ -1466,6 +1483,16 @@ public:
 		__pos.x = xx;
 		__pos.y = yy;
 	}
+	void SetXY(const fixedvec2 &npos)
+	{
+		__pos.x = npos.x;
+		__pos.y = npos.y;
+	}
+	void SetXY(const DVector2 &npos)
+	{
+		__pos.x = FLOAT2FIXED(npos.X);
+		__pos.y = FLOAT2FIXED(npos.Y);
+	}
 	void SetXYZ(fixed_t xx, fixed_t yy, fixed_t zz)
 	{
 		__pos.x = xx;
@@ -1478,11 +1505,6 @@ public:
 		__pos.y = FLOAT2FIXED(yy);
 		__pos.z = FLOAT2FIXED(zz);
 	}
-	void SetXY(const fixedvec2 &npos)
-	{
-		__pos.x = npos.x;
-		__pos.y = npos.y;
-	}
 	void SetXYZ(const fixedvec3 &npos)
 	{
 		__pos.x = npos.x;
@@ -1570,6 +1592,8 @@ public:
 		return MAX(1., Distance2D(dest) / speed);
 	}
 
+	int ApplyDamageFactor(FName damagetype, int damage) const;
+
 
 	// begin of GZDoom specific additions
 	TArray<TObjPtr<AActor> >		dynamiclights;
@@ -1650,6 +1674,10 @@ inline AActor *Spawn (PClassActor *type, fixed_t x, fixed_t y, fixed_t z, replac
 {
 	return AActor::StaticSpawn (type, x, y, z, allowreplacement);
 }
+inline AActor *Spawn(PClassActor *type)
+{
+	return AActor::StaticSpawn(type, 0, 0, 0, NO_REPLACE);
+}
 inline AActor *Spawn (PClassActor *type, const fixedvec3 &pos, replace_t allowreplacement)
 {
 	return AActor::StaticSpawn (type, pos.x, pos.y, pos.z, allowreplacement);
@@ -1666,6 +1694,11 @@ inline AActor *Spawn(PClassActor *type, const DVector3 &pos, replace_t allowrepl
 AActor *Spawn (const char *type, fixed_t x, fixed_t y, fixed_t z, replace_t allowreplacement);
 AActor *Spawn (FName classname, fixed_t x, fixed_t y, fixed_t z, replace_t allowreplacement);
 
+inline AActor *Spawn(FName type)
+{
+	return Spawn(type, 0, 0, 0, NO_REPLACE);
+}
+
 inline AActor *Spawn (const char *type, const fixedvec3 &pos, replace_t allowreplacement)
 {
 	return Spawn (type, pos.x, pos.y, pos.z, allowreplacement);
@@ -1714,6 +1747,21 @@ inline T *Spawn(const DVector3 &pos, replace_t allowreplacement)
 	return static_cast<T *>(AActor::StaticSpawn(RUNTIME_TEMPLATE_CLASS(T), FLOAT2FIXED(pos.X), FLOAT2FIXED(pos.Y), zz, allowreplacement));
 }
 
+template<class T>
+inline T *Spawn(double x, double y, double z, replace_t allowreplacement)
+{
+	fixed_t zz;
+	if (z != ONFLOORZ && z != ONCEILINGZ && z != FLOATRANDZ) zz = FLOAT2FIXED(z);
+	else zz = (int)z;
+	return static_cast<T *>(AActor::StaticSpawn(RUNTIME_TEMPLATE_CLASS(T), FLOAT2FIXED(x), FLOAT2FIXED(y), zz, allowreplacement));
+}
+
+template<class T>
+inline T *Spawn()	// for inventory items we do not need coordinates and replacement info.
+{
+	return static_cast<T *>(AActor::StaticSpawn(RUNTIME_TEMPLATE_CLASS(T), 0, 0, 0, NO_REPLACE));
+}
+
 inline fixedvec2 Vec2Angle(fixed_t length, angle_t angle)
 {
 	fixedvec2 ret = { FixedMul(length, finecosine[angle >> ANGLETOFINESHIFT]),
diff --git a/src/am_map.cpp b/src/am_map.cpp
index d0caf9f28..7c01b2a2f 100644
--- a/src/am_map.cpp
+++ b/src/am_map.cpp
@@ -802,7 +802,7 @@ static bool stopped = true;
 static void AM_calcMinMaxMtoF();
 
 static void DrawMarker (FTexture *tex, fixed_t x, fixed_t y, int yadjust,
-	INTBOOL flip, fixed_t xscale, fixed_t yscale, int translation, fixed_t alpha, DWORD fillcolor, FRenderStyle renderstyle);
+	INTBOOL flip, fixed_t xscale, fixed_t yscale, int translation, double alpha, DWORD fillcolor, FRenderStyle renderstyle);
 
 void AM_rotatePoint (fixed_t *x, fixed_t *y);
 void AM_rotate (fixed_t *x, fixed_t *y, angle_t an);
@@ -2716,7 +2716,7 @@ void AM_drawPlayers ()
 			continue;
 		}
 
-		if (p->mo->alpha < OPAQUE)
+		if (p->mo->Alpha < 1.)
 		{
 			color = AMColors[AMColors.AlmostBackgroundColor];
 		}
@@ -2848,7 +2848,7 @@ void AM_drawThings ()
 					const fixed_t spriteYScale = fixed_t(t->Scale.Y * 10 * scale_mtof);
 
 					DrawMarker (texture, p.x, p.y, 0, !!(frame->Flip & (1 << rotation)),
-						spriteXScale, spriteYScale, t->Translation, FRACUNIT, 0, LegacyRenderStyles[STYLE_Normal]);
+						spriteXScale, spriteYScale, t->Translation, 1., 0, LegacyRenderStyles[STYLE_Normal]);
 				}
 				else
 				{
@@ -2936,7 +2936,7 @@ void AM_drawThings ()
 //=============================================================================
 
 static void DrawMarker (FTexture *tex, fixed_t x, fixed_t y, int yadjust,
-	INTBOOL flip, fixed_t xscale, fixed_t yscale, int translation, fixed_t alpha, DWORD fillcolor, FRenderStyle renderstyle)
+	INTBOOL flip, fixed_t xscale, fixed_t yscale, int translation, double alpha, DWORD fillcolor, FRenderStyle renderstyle)
 {
 	if (tex == NULL || tex->UseType == FTexture::TEX_Null)
 	{
@@ -2955,7 +2955,7 @@ static void DrawMarker (FTexture *tex, fixed_t x, fixed_t y, int yadjust,
 		DTA_ClipRight, f_x + f_w,
 		DTA_FlipX, flip,
 		DTA_Translation, TranslationToTable(translation),
-		DTA_Alpha, alpha,
+		DTA_AlphaF, alpha,
 		DTA_FillColor, fillcolor,
 		DTA_RenderStyle, DWORD(renderstyle),
 		TAG_DONE);
@@ -3043,7 +3043,7 @@ void AM_drawAuthorMarkers ()
 			{
 				DrawMarker (tex, marked->_f_X() >> FRACTOMAPBITS, marked->_f_Y() >> FRACTOMAPBITS, 0,
 					flip, FLOAT2FIXED(mark->Scale.X), FLOAT2FIXED(mark->Scale.Y), mark->Translation,
-					mark->alpha, mark->fillcolor, mark->RenderStyle);
+					mark->Alpha, mark->fillcolor, mark->RenderStyle);
 			}
 			marked = mark->args[0] != 0 ? it.Next() : NULL;
 		}
diff --git a/src/b_func.cpp b/src/b_func.cpp
index 98653ca9e..bb824d098 100644
--- a/src/b_func.cpp
+++ b/src/b_func.cpp
@@ -127,7 +127,7 @@ bool DBot::Check_LOS (AActor *to, angle_t vangle)
 	if (vangle == 0)
 		return false; //Looker seems to be blind.
 
-	return absangle(player->mo->__f_AngleTo(to) - player->mo->_f_angle()) <= vangle/2;
+	return absangle(player->mo->AngleTo(to), player->mo->Angles.Yaw) <= ANGLE2FLOAT(vangle/2);
 }
 
 //-------------------------------------
diff --git a/src/b_move.cpp b/src/b_move.cpp
index 63a0bc623..f5eba7ea7 100644
--- a/src/b_move.cpp
+++ b/src/b_move.cpp
@@ -269,17 +269,17 @@ bool FCajunMaster::CleanAhead (AActor *thing, fixed_t x, fixed_t y, ticcmd_t *cm
 
     if (!(thing->flags & MF_NOCLIP) )
     {
-		fixed_t maxstep = thing->MaxStepHeight;
         if (tm.ceilingz - tm.floorz < thing->Height)
             return false;       // doesn't fit
 
+		double maxmove = FIXED2FLOAT(MAXMOVEHEIGHT);
 		if (!(thing->flags&MF_MISSILE))
 		{
-			if(tm._f_floorz() > (thing->Sector->floorplane.ZatPoint (x, y)+MAXMOVEHEIGHT)) //Too high wall
+			if(tm.floorz > (thing->Sector->floorplane._f_ZatPointF(x, y)+maxmove)) //Too high wall
 				return false;
 
 			//Jumpable
-			if(tm._f_floorz()>(thing->Sector->floorplane.ZatPoint (x, y)+thing->MaxStepHeight))
+			if(tm.floorz > (thing->Sector->floorplane._f_ZatPointF(x, y)+thing->MaxStepHeight))
 				cmd->ucmd.buttons |= BT_JUMP;
 
 
@@ -292,7 +292,7 @@ bool FCajunMaster::CleanAhead (AActor *thing, fixed_t x, fixed_t y, ticcmd_t *cm
 //	            maxstep=37*FRACUNIT;
 
 	        if ( !(thing->flags & MF_TELEPORT) &&
-	             (tm._f_floorz() - thing->_f_Z() > maxstep ) )
+	             (tm.floorz - thing->Z() > thing->MaxStepHeight) )
 	            return false;       // too big a step up
 
 
diff --git a/src/d_dehacked.cpp b/src/d_dehacked.cpp
index 7a0ce0d88..aee1afd46 100644
--- a/src/d_dehacked.cpp
+++ b/src/d_dehacked.cpp
@@ -896,7 +896,7 @@ static int PatchThing (int thingy)
 		}
 		else if (linelen == 12 && stricmp (Line1, "Translucency") == 0)
 		{
-			info->alpha = val;
+			info->Alpha = FIXED2DBL(val);
 			info->RenderStyle = STYLE_Translucent;
 			hadTranslucency = true;
 			hadStyle = true;
@@ -923,7 +923,7 @@ static int PatchThing (int thingy)
 			}
 			else if (stricmp (Line1, "Alpha") == 0)
 			{
-				info->alpha = (fixed_t)(atof (Line2) * FRACUNIT);
+				info->Alpha = atof (Line2);
 				hadTranslucency = true;
 			}
 			else if (stricmp (Line1, "Scale") == 0)
@@ -1226,11 +1226,11 @@ static int PatchThing (int thingy)
 					{
 						hadTranslucency = true;
 						if (value[2] & 1)
-							info->alpha = TRANSLUC25;
+							info->Alpha = 0.25;
 						else if (value[2] & 2)
-							info->alpha = TRANSLUC50;
+							info->Alpha = 0.5;
 						else if (value[2] & 4)
-							info->alpha = TRANSLUC75;
+							info->Alpha = 0.75;
 						info->RenderStyle = STYLE_Translucent;
 					}
 					if (value[2] & 8)
@@ -1268,7 +1268,7 @@ static int PatchThing (int thingy)
 				if (!hadStyle)
 					info->RenderStyle = STYLE_OptFuzzy;
 				if (!hadTranslucency)
-					info->alpha = FRACUNIT/5;
+					info->Alpha = 0.5;
 			}
 			else
 			{ // changed from shadow
@@ -1853,7 +1853,7 @@ static int PatchMisc (int dummy)
 			}
 			else if (stricmp (Line1, "Rocket Explosion Alpha") == 0)
 			{
-				deh.ExplosionAlpha = (fixed_t)(atof (Line2) * FRACUNIT);
+				deh.ExplosionAlpha = atof (Line2);
 			}
 			else if (stricmp (Line1, "Monsters Infight") == 0)
 			{
diff --git a/src/d_player.h b/src/d_player.h
index 8e7a47077..10297159c 100644
--- a/src/d_player.h
+++ b/src/d_player.h
@@ -404,7 +404,7 @@ public:
 	float		FOV;					// current field of vision
 	fixed_t		viewz;					// focal origin above r.z
 	fixed_t		viewheight;				// base height above floor for viewz
-	fixed_t		deltaviewheight;		// squat speed.
+	double		deltaviewheight;		// squat speed.
 	double		bob;					// bounded/scaled total velocity
 
 	// killough 10/98: used for realistic bobbing (i.e. not simply overall speed)
@@ -492,7 +492,7 @@ public:
 	DAngle			MaxPitch;
 
 	double crouchfactor;
-	fixed_t crouchoffset;
+	double crouchoffset;
 	fixed_t crouchviewdelta;
 
 	FWeaponSlots weapons;
@@ -502,9 +502,9 @@ public:
 	DAngle ConversationNPCAngle;
 	bool ConversationFaceTalker;
 
-	fixed_t GetDeltaViewHeight() const
+	double GetDeltaViewHeight() const
 	{
-		return (mo->ViewHeight + crouchviewdelta - viewheight) >> 3;
+		return FIXED2DBL((mo->ViewHeight + crouchviewdelta - viewheight) >> 3);
 	}
 
 	void Uncrouch()
diff --git a/src/doomdata.h b/src/doomdata.h
index ddbf899d5..dc70d0ccf 100644
--- a/src/doomdata.h
+++ b/src/doomdata.h
@@ -359,7 +359,7 @@ struct FMapThing
 	int			args[5];
 	int			Conversation;
 	double		Gravity;
-	fixed_t		alpha;
+	double		Alpha;
 	DWORD		fillcolor;
 	DVector2	Scale;
 	int			health;
@@ -428,15 +428,19 @@ enum EMapThingFlags
 // A simplified mapthing for player starts
 struct FPlayerStart
 {
-	fixed_t x, y, z;
+	DVector3 pos;
 	short angle, type;
 
 	FPlayerStart() { }
 	FPlayerStart(const FMapThing *mthing, int pnum)
-	: x(mthing->x), y(mthing->y), z(mthing->z),
+	: pos(FIXED2DBL(mthing->x), FIXED2DBL(mthing->y), FIXED2DBL(mthing->z)),
 	  angle(mthing->angle),
 	  type(pnum)
 	{ }
+
+	fixed_t _f_X() { return FLOAT2FIXED(pos.X); }
+	fixed_t _f_Y() { return FLOAT2FIXED(pos.Y); }
+	fixed_t _f_Z() { return FLOAT2FIXED(pos.Z); }
 };
 // Player spawn spots for deathmatch.
 extern TArray<FPlayerStart> deathmatchstarts;
diff --git a/src/doomstat.h b/src/doomstat.h
index 43d81e866..cd0836990 100644
--- a/src/doomstat.h
+++ b/src/doomstat.h
@@ -234,7 +234,7 @@ struct DehInfo
 	int KFAAC;
 	char PlayerSprite[5];
 	BYTE ExplosionStyle;
-	fixed_t ExplosionAlpha;
+	double ExplosionAlpha;
 	int NoAutofreeze;
 	int BFGCells;
 };
diff --git a/src/edata.cpp b/src/edata.cpp
index 82260ca80..746528575 100644
--- a/src/edata.cpp
+++ b/src/edata.cpp
@@ -275,7 +275,7 @@ static void parseSector(FScanner &sc)
 	EDSector sec;
 
 	memset(&sec, 0, sizeof(sec));
-	sec.overlayalpha[sector_t::floor] = sec.overlayalpha[sector_t::ceiling] = FRACUNIT;
+	sec.overlayalpha[sector_t::floor] = sec.overlayalpha[sector_t::ceiling] = OPAQUE;
 	sec.floorterrain = sec.ceilingterrain = -1;
 
 	sc.MustGetStringName("{");
diff --git a/src/fragglescript/t_fspic.cpp b/src/fragglescript/t_fspic.cpp
index ba0e05195..0e7c80346 100644
--- a/src/fragglescript/t_fspic.cpp
+++ b/src/fragglescript/t_fspic.cpp
@@ -115,7 +115,7 @@ void DHUDPicManager::DoDraw (int linenum, int x, int y, int hudheight, float tra
 	{
 		FTexture * tex = TexMan[piclist[i].texturenum];
 		if (tex) screen->DrawTexture(tex, piclist[i].xpos, piclist[i].ypos, DTA_320x200, true, 
-										DTA_Alpha, (fixed_t)(translucent*basetrans*FRACUNIT), TAG_DONE);
+										DTA_AlphaF, translucent*basetrans, TAG_DONE);
 	}
 }
 
diff --git a/src/fragglescript/t_func.cpp b/src/fragglescript/t_func.cpp
index 0e9216d80..7cebb6148 100644
--- a/src/fragglescript/t_func.cpp
+++ b/src/fragglescript/t_func.cpp
@@ -1396,15 +1396,12 @@ void FParser::SF_PointToAngle(void)
 {
 	if (CheckArgs(4))
 	{
-		fixed_t x1 = fixedvalue(t_argv[0]);
-		fixed_t y1 = fixedvalue(t_argv[1]);
-		fixed_t x2 = fixedvalue(t_argv[2]);
-		fixed_t y2 = fixedvalue(t_argv[3]);
+		double x1 = floatvalue(t_argv[0]);
+		double y1 = floatvalue(t_argv[1]);
+		double x2 = floatvalue(t_argv[2]);
+		double y2 = floatvalue(t_argv[3]);
 		
-		angle_t angle = R_PointToAngle2(x1, y1, x2, y2);
-		
-		t_return.type = svt_fixed;
-		t_return.value.f = (fixed_t)AngleToFixed(angle);
+		t_return.setDouble(DVector2(x2 - x1, y2 - y1).Angle().Normalized360().Degrees);
 	}
 }
 
@@ -2575,7 +2572,7 @@ static void FS_GiveInventory (AActor *actor, const char * type, int amount)
 	AWeapon *savedPendingWeap = actor->player != NULL? actor->player->PendingWeapon : NULL;
 	bool hadweap = actor->player != NULL ? actor->player->ReadyWeapon != NULL : true;
 
-	AInventory *item = static_cast<AInventory *>(Spawn (info, 0,0,0, NO_REPLACE));
+	AInventory *item = static_cast<AInventory *>(Spawn (info));
 
 	// This shouldn't count for the item statistics!
 	item->ClearCounters();
@@ -2783,7 +2780,7 @@ void FParser::SF_MaxPlayerAmmo()
 			if(amount < 0) amount = 0;
 			if (!iammo) 
 			{
-				iammo = static_cast<AAmmo *>(Spawn (ammotype, 0, 0, 0, NO_REPLACE));
+				iammo = static_cast<AAmmo *>(Spawn (ammotype));
 				iammo->Amount = 0;
 				iammo->AttachToOwner (players[playernum].mo);
 			}
@@ -3062,8 +3059,7 @@ void FParser::SF_MoveCamera(void)
 	fixed_t    x, y, z;  
 	fixed_t    zdist, xydist, movespeed;
 	fixed_t    xstep, ystep, zstep, targetheight;
-	angle_t    anglespeed, anglestep, angledist, targetangle, 
-		bigangle, smallangle;
+	angle_t    anglespeed, anglestep, angledist, targetangle, bigangle, smallangle;
 	DAngle mobjangle;
 	
 	// I have to use floats for the math where angles are divided 
@@ -3080,12 +3076,19 @@ void FParser::SF_MoveCamera(void)
 	if (CheckArgs(6))
 	{
 		cam = actorvalue(t_argv[0]);
-
 		target = actorvalue(t_argv[1]);
 		if(!cam || !target) 
 		{ 
 			script_error("invalid target for camera\n"); return; 
 		}
+
+		DVector2 fdist = cam->Vec2To(target);
+		fixed_t distx = FLOAT2FIXED(fdist.X);
+		fixed_t disty = FLOAT2FIXED(fdist.Y);
+		fixed_t camx = FLOAT2FIXED(cam->X());
+		fixed_t camy = FLOAT2FIXED(cam->Y());
+		fixed_t camz = FLOAT2FIXED(cam->Z());
+
 		
 		targetheight = fixedvalue(t_argv[2]);
 		movespeed    = fixedvalue(t_argv[3]);
@@ -3093,8 +3096,7 @@ void FParser::SF_MoveCamera(void)
 		anglespeed   = (angle_t)FixedToAngle(fixedvalue(t_argv[5]));
 		
 		// figure out how big one step will be
-		fixedvec2 dist = cam->_f_Vec2To(target);
-		zdist = targetheight - cam->_f_Z();
+		zdist = targetheight - camz;
 		
 		// Angle checking...  
 		//    90  
@@ -3166,19 +3168,19 @@ void FParser::SF_MoveCamera(void)
 		else
 			anglestep = anglespeed;
 		
-		if(abs(xstep) >= (abs(dist.x) - 1))
-			x = cam->_f_X() + dist.x;
+		if(abs(xstep) >= (abs(distx) - 1))
+			x = camx + distx;
 		else
 		{
-			x = cam->_f_X() + xstep;
+			x = camx + xstep;
 			moved = 1;
 		}
 		
-		if(abs(ystep) >= (abs(dist.y) - 1))
-			y = cam->_f_Y() + dist.y;
+		if(abs(ystep) >= (abs(disty) - 1))
+			y = camy + disty;
 		else
 		{
-			y = cam->_f_Y() + ystep;
+			y = camy + ystep;
 			moved = 1;
 		}
 		
@@ -3186,7 +3188,7 @@ void FParser::SF_MoveCamera(void)
 			z = targetheight;
 		else
 		{
-			z = cam->_f_Z() + zstep;
+			z = camz + zstep;
 			moved = 1;
 		}
 		
@@ -3208,12 +3210,12 @@ void FParser::SF_MoveCamera(void)
 
 		cam->radius = 1 / 8192.;
 		cam->Height = 1 / 8192.;
-		if ((x != cam->_f_X() || y != cam->_f_Y()) && !P_TryMove(cam, x, y, true))
+		if ((x != camx || y != camy) && !P_TryMove(cam, FIXED2FLOAT(x), FIXED2FLOAT(y), true))
 		{
 			Printf("Illegal camera move to (%f, %f)\n", x/65536.f, y/65536.f);
 			return;
 		}
-		cam->_f_SetZ(z);
+		cam->SetZ(FIXED2FLOAT(z));
 
 		t_return.type = svt_int;
 		t_return.value.i = moved;
@@ -3407,9 +3409,9 @@ void FParser::SF_SetObjPosition()
 		if (!mobj) return;
 
 		mobj->SetOrigin(
-			fixedvalue(t_argv[1]),
-			(t_argc >= 3)? fixedvalue(t_argv[2]) : mobj->_f_Y(),
-			(t_argc >= 4)? fixedvalue(t_argv[3]) : mobj->_f_Z(), false);
+			floatvalue(t_argv[1]),
+			(t_argc >= 3)? floatvalue(t_argv[2]) : mobj->Y(),
+			(t_argc >= 4)? floatvalue(t_argv[3]) : mobj->Z(), false);
 	}
 }
 
@@ -3819,8 +3821,7 @@ void FParser::SF_Sin()
 {
 	if (CheckArgs(1))
 	{
-		t_return.type = svt_fixed;
-		t_return.value.f = FLOAT2FIXED(g_sin(floatvalue(t_argv[0])));
+		t_return.setDouble(g_sin(floatvalue(t_argv[0])));
 	}
 }
 
@@ -3829,8 +3830,7 @@ void FParser::SF_ASin()
 {
 	if (CheckArgs(1))
 	{
-		t_return.type = svt_fixed;
-		t_return.value.f = FLOAT2FIXED(g_asin(floatvalue(t_argv[0])));
+		t_return.setDouble(g_asin(floatvalue(t_argv[0])));
 	}
 }
 
@@ -3839,8 +3839,7 @@ void FParser::SF_Cos()
 {
 	if (CheckArgs(1))
 	{
-		t_return.type = svt_fixed;
-		t_return.value.f = FLOAT2FIXED(g_cos(floatvalue(t_argv[0])));
+		t_return.setDouble(g_cos(floatvalue(t_argv[0])));
 	}
 }
 
@@ -3849,8 +3848,7 @@ void FParser::SF_ACos()
 {
 	if (CheckArgs(1))
 	{
-		t_return.type = svt_fixed;
-		t_return.value.f = FLOAT2FIXED(g_acos(floatvalue(t_argv[0])));
+		t_return.setDouble(g_acos(floatvalue(t_argv[0])));
 	}
 }
 
@@ -3859,9 +3857,7 @@ void FParser::SF_Tan()
 {
 	if (CheckArgs(1))
 	{
-		t_return.type = svt_fixed;
-		t_return.value.f = FLOAT2FIXED(
-			g_tan(floatvalue(t_argv[0])));
+		t_return.setDouble(g_tan(floatvalue(t_argv[0])));
 	}
 }
 
@@ -3870,8 +3866,7 @@ void FParser::SF_ATan()
 {
 	if (CheckArgs(1))
 	{
-		t_return.type = svt_fixed;
-		t_return.value.f = FLOAT2FIXED(g_atan(floatvalue(t_argv[0])));
+		t_return.setDouble(g_atan(floatvalue(t_argv[0])));
 	}
 }
 
@@ -3880,8 +3875,7 @@ void FParser::SF_Exp()
 {
 	if (CheckArgs(1))
 	{
-		t_return.type = svt_fixed;
-		t_return.value.f = FLOAT2FIXED(g_exp(floatvalue(t_argv[0])));
+		t_return.setDouble(g_exp(floatvalue(t_argv[0])));
 	}
 }
 
@@ -3889,8 +3883,7 @@ void FParser::SF_Log()
 {
 	if (CheckArgs(1))
 	{
-		t_return.type = svt_fixed;
-		t_return.value.f = FLOAT2FIXED(g_log(floatvalue(t_argv[0])));
+		t_return.setDouble(g_log(floatvalue(t_argv[0])));
 	}
 }
 
@@ -3899,8 +3892,7 @@ void FParser::SF_Sqrt()
 {
 	if (CheckArgs(1))
 	{
-		t_return.type = svt_fixed;
-		t_return.value.f = FLOAT2FIXED(g_sqrt(floatvalue(t_argv[0])));
+		t_return.setDouble(g_sqrt(floatvalue(t_argv[0])));
 	}
 }
 
@@ -3910,7 +3902,7 @@ void FParser::SF_Floor()
 	if (CheckArgs(1))
 	{
 		t_return.type = svt_fixed;
-		t_return.value.f = fixedvalue(t_argv[0]) & 0xffFF0000;
+		t_return.value.f = fixedvalue(t_argv[0]) & 0xffff0000;
 	}
 }
 
@@ -3919,8 +3911,7 @@ void FParser::SF_Pow()
 {
 	if (CheckArgs(2))
 	{
-		t_return.type = svt_fixed;
-		t_return.value.f = FLOAT2FIXED(pow(floatvalue(t_argv[0]), floatvalue(t_argv[1])));
+		t_return.setDouble(pow(floatvalue(t_argv[0]), floatvalue(t_argv[1])));
 	}
 }
 
diff --git a/src/g_doom/a_doomweaps.cpp b/src/g_doom/a_doomweaps.cpp
index 22f471482..936574570 100644
--- a/src/g_doom/a_doomweaps.cpp
+++ b/src/g_doom/a_doomweaps.cpp
@@ -206,7 +206,7 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_Saw)
 			if (armorbonustype != NULL)
 			{
 				assert(armorbonustype->IsDescendantOf (RUNTIME_CLASS(ABasicArmorBonus)));
-				ABasicArmorBonus *armorbonus = static_cast<ABasicArmorBonus *>(Spawn(armorbonustype, 0,0,0, NO_REPLACE));
+				ABasicArmorBonus *armorbonus = static_cast<ABasicArmorBonus *>(Spawn(armorbonustype));
 				armorbonus->SaveAmount = int(armorbonus->SaveAmount * actualdamage * lifesteal);
 				armorbonus->MaxSaveAmount = lifestealmax <= 0 ? armorbonus->MaxSaveAmount : lifestealmax;
 				armorbonus->flags |= MF_DROPPED;
diff --git a/src/g_game.cpp b/src/g_game.cpp
index 869a521f5..2bf490bd2 100644
--- a/src/g_game.cpp
+++ b/src/g_game.cpp
@@ -1288,7 +1288,7 @@ void G_PlayerFinishLevel (int player, EFinishLevelType mode, int flags)
 		p->mo->flags &= ~MF_SHADOW;
 	}
 	p->mo->RenderStyle = p->mo->GetDefault()->RenderStyle;
-	p->mo->alpha = p->mo->GetDefault()->alpha;
+	p->mo->Alpha = p->mo->GetDefault()->Alpha;
 	p->extralight = 0;					// cancel gun flashes
 	p->fixedcolormap = NOFIXEDCOLORMAP;	// cancel ir goggles
 	p->fixedlightlevel = -1;
@@ -1430,9 +1430,9 @@ bool G_CheckSpot (int playernum, FPlayerStart *mthing)
 
 	if (mthing->type == 0) return false;
 
-	x = mthing->x;
-	y = mthing->y;
-	z = mthing->z;
+	x = mthing->_f_X();
+	y = mthing->_f_Y();
+	z = mthing->_f_Z();
 
 	if (!(level.flags & LEVEL_USEPLAYERSTARTZ))
 	{
@@ -1476,10 +1476,10 @@ bool G_CheckSpot (int playernum, FPlayerStart *mthing)
 //
 
 // [RH] Returns the distance of the closest player to the given mapthing
-static fixed_t PlayersRangeFromSpot (FPlayerStart *spot)
+static double PlayersRangeFromSpot (FPlayerStart *spot)
 {
-	fixed_t closest = INT_MAX;
-	fixed_t distance;
+	double closest = INT_MAX;
+	double distance;
 	int i;
 
 	for (i = 0; i < MAXPLAYERS; i++)
@@ -1487,7 +1487,7 @@ static fixed_t PlayersRangeFromSpot (FPlayerStart *spot)
 		if (!playeringame[i] || !players[i].mo || players[i].health <= 0)
 			continue;
 
-		distance = players[i].mo->AproxDistance (spot->x, spot->y);
+		distance = players[i].mo->Distance2D(spot->pos.X, spot->pos.Y);
 
 		if (distance < closest)
 			closest = distance;
@@ -1499,13 +1499,13 @@ static fixed_t PlayersRangeFromSpot (FPlayerStart *spot)
 // [RH] Select the deathmatch spawn spot farthest from everyone.
 static FPlayerStart *SelectFarthestDeathmatchSpot (size_t selections)
 {
-	fixed_t bestdistance = 0;
+	double bestdistance = 0;
 	FPlayerStart *bestspot = NULL;
 	unsigned int i;
 
 	for (i = 0; i < selections; i++)
 	{
-		fixed_t distance = PlayersRangeFromSpot (&deathmatchstarts[i]);
+		double distance = PlayersRangeFromSpot (&deathmatchstarts[i]);
 
 		if (distance > bestdistance)
 		{
diff --git a/src/g_heretic/a_hereticartifacts.cpp b/src/g_heretic/a_hereticartifacts.cpp
index 860644eee..518abb44a 100644
--- a/src/g_heretic/a_hereticartifacts.cpp
+++ b/src/g_heretic/a_hereticartifacts.cpp
@@ -51,7 +51,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_TimeBomb)
 
 	self->AddZ(32, false);
 	self->RenderStyle = STYLE_Add;
-	self->alpha = FRACUNIT;
+	self->Alpha = 1.;
 	P_RadiusAttack (self, self->target, 128, 128, self->DamageType, RADF_HURTSOURCE);
 	P_CheckSplash(self, 128);
 	return 0;
diff --git a/src/g_heretic/a_hereticmisc.cpp b/src/g_heretic/a_hereticmisc.cpp
index 927d13dc4..c8a330536 100644
--- a/src/g_heretic/a_hereticmisc.cpp
+++ b/src/g_heretic/a_hereticmisc.cpp
@@ -172,9 +172,9 @@ DEFINE_ACTION_FUNCTION(AActor, A_VolcanoBlast)
 	count = 1 + (pr_blast() % 3);
 	for (i = 0; i < count; i++)
 	{
-		blast = Spawn("VolcanoBlast", self->PosPlusZ(44*FRACUNIT), ALLOW_REPLACE);
+		blast = Spawn("VolcanoBlast", self->PosPlusZ(44.), ALLOW_REPLACE);
 		blast->target = self;
-		blast->Angles.Yaw = pr_blast() * (360 / 256.f);
+		blast->Angles.Yaw = pr_blast() * (360 / 256.);
 		blast->VelFromAngle(1.);
 		blast->Vel.Z = 2.5 + pr_blast() / 64.;
 		S_Sound (blast, CHAN_BODY, "world/volcano/shoot", 1, ATTN_NORM);
diff --git a/src/g_heretic/a_hereticweaps.cpp b/src/g_heretic/a_hereticweaps.cpp
index f36ea54b5..5927778c5 100644
--- a/src/g_heretic/a_hereticweaps.cpp
+++ b/src/g_heretic/a_hereticweaps.cpp
@@ -1247,7 +1247,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_PhoenixPuff)
 	DAngle angle;
 
 	//[RH] Heretic never sets the target for seeking
-	//P_SeekerMissile (self, ANGLE_1*5, ANGLE_1*10);
+	//P_SeekerMissile (self, 5, 10);
 	puff = Spawn("PhoenixPuff", self->Pos(), ALLOW_REPLACE);
 	angle = self->Angles.Yaw + 90;
 	puff->Vel = DVector3(angle.ToVector(1.3), 0);
diff --git a/src/g_heretic/a_ironlich.cpp b/src/g_heretic/a_ironlich.cpp
index 820d650f9..7f33fb57a 100644
--- a/src/g_heretic/a_ironlich.cpp
+++ b/src/g_heretic/a_ironlich.cpp
@@ -162,7 +162,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_WhirlwindSeek)
 	{
 		return 0;
 	}
-	P_SeekerMissile(self, ANGLE_1 * 10, ANGLE_1 * 30);
+	P_SeekerMissile(self, 10, 30);
 	return 0;
 }
 
diff --git a/src/g_heretic/a_wizard.cpp b/src/g_heretic/a_wizard.cpp
index 51a01efc5..704488f16 100644
--- a/src/g_heretic/a_wizard.cpp
+++ b/src/g_heretic/a_wizard.cpp
@@ -53,7 +53,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_WizAtk2)
 	PARAM_ACTION_PROLOGUE;
 
 	A_FaceTarget (self);
-	self->alpha = HR_SHADOW;
+	self->Alpha = HR_SHADOW;
 	self->RenderStyle = STYLE_Translucent;
 	self->flags3 |= MF3_GHOST;
 	return 0;
diff --git a/src/g_hexen/a_bats.cpp b/src/g_hexen/a_bats.cpp
index 507af8011..56c7ac024 100644
--- a/src/g_hexen/a_bats.cpp
+++ b/src/g_hexen/a_bats.cpp
@@ -39,7 +39,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_BatSpawn)
 
 	AActor *mo;
 	int delta;
-	angle_t angle;
+	DAngle angle;
 
 	// Countdown until next spawn
 	if (self->special1-- > 0) return 0;
@@ -47,7 +47,9 @@ DEFINE_ACTION_FUNCTION(AActor, A_BatSpawn)
 
 	delta = self->args[1];
 	if (delta==0) delta=1;
-	angle = self->_f_angle() + (((pr_batspawn()%delta)-(delta>>1))<<24);
+
+	angle = self->Angles.Yaw + (((pr_batspawn() % delta) - (delta >> 1)) * (360 / 256.));
+
 	mo = P_SpawnMissileAngle (self, PClass::FindActor("Bat"), angle, 0);
 	if (mo)
 	{
@@ -90,7 +92,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_BatMove)
 	}
 
 	// Handle Z movement
-	self->SetZ(self->target->Z() + 16 * g_sin(BOBTORAD(self->args[0])));
+	self->SetZ(self->target->Z() + 2 * BobSin(self->args[0]));
 	self->args[0] = (self->args[0]+3)&63;	
 	return 0;
 }
diff --git a/src/g_hexen/a_bishop.cpp b/src/g_hexen/a_bishop.cpp
index 319c2b53d..5fb95d8be 100644
--- a/src/g_hexen/a_bishop.cpp
+++ b/src/g_hexen/a_bishop.cpp
@@ -80,7 +80,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_BishopMissileWeave)
 {
 	PARAM_ACTION_PROLOGUE;
 
-	A_Weave(self, 2, 2, 2*FRACUNIT, FRACUNIT);
+	A_Weave(self, 2, 2, 2., 1.);
 	return 0;
 }
 
@@ -174,10 +174,10 @@ DEFINE_ACTION_FUNCTION(AActor, A_BishopChase)
 {
 	PARAM_ACTION_PROLOGUE;
 
-	fixed_t newz = self->_f_Z() - finesine[self->special2 << BOBTOFINESHIFT] * 4;
+	double newz = self->Z() - BobSin(self->special2) / 2.;
 	self->special2 = (self->special2 + 4) & 63;
-	newz += finesine[self->special2 << BOBTOFINESHIFT] * 4;
-	self->_f_SetZ(newz);
+	newz += BobSin(self->special2) / 2.;
+	self->SetZ(newz);
 	return 0;
 }
 
@@ -193,7 +193,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_BishopPuff)
 
 	AActor *mo;
 
-	mo = Spawn ("BishopPuff", self->PosPlusZ(40*FRACUNIT), ALLOW_REPLACE);
+	mo = Spawn ("BishopPuff", self->PosPlusZ(40.), ALLOW_REPLACE);
 	if (mo)
 	{
 		mo->Vel.Z = -.5;
@@ -218,9 +218,9 @@ DEFINE_ACTION_FUNCTION(AActor, A_BishopPainBlur)
 		self->SetState (self->FindState ("Blur"));
 		return 0;
 	}
-	fixed_t xo = (pr_pain.Random2() << 12);
-	fixed_t yo = (pr_pain.Random2() << 12);
-	fixed_t zo = (pr_pain.Random2() << 11);
+	double xo = pr_pain.Random2() / 16.;
+	double yo = pr_pain.Random2() / 16.;
+	double zo = pr_pain.Random2() / 32.;
 	mo = Spawn ("BishopPainBlur", self->Vec3Offset(xo, yo, zo), ALLOW_REPLACE);
 	if (mo)
 	{
diff --git a/src/g_hexen/a_blastradius.cpp b/src/g_hexen/a_blastradius.cpp
index 2e9f358f1..58ff083ac 100644
--- a/src/g_hexen/a_blastradius.cpp
+++ b/src/g_hexen/a_blastradius.cpp
@@ -9,8 +9,8 @@
 */
 
 /* For reference, the default values:
-#define BLAST_RADIUS_DIST	255*FRACUNIT
-#define BLAST_SPEED			20*FRACUNIT
+#define BLAST_RADIUS_DIST	255*F.RACUNIT
+#define BLAST_SPEED			20*F.RACUNIT
 #define BLAST_FULLSTRENGTH	255
 */
 
@@ -22,7 +22,7 @@
 //
 //==========================================================================
 
-void BlastActor (AActor *victim, fixed_t strength, double speed, AActor *Owner, PClassActor *blasteffect, bool dontdamage)
+void BlastActor (AActor *victim, double strength, double speed, AActor *Owner, PClassActor *blasteffect, bool dontdamage)
 {
 	DAngle angle;
 	AActor *mo;
@@ -97,7 +97,7 @@ DEFINE_ACTION_FUNCTION_PARAMS (AActor, A_Blast)
 {
 	PARAM_ACTION_PROLOGUE;
 	PARAM_INT_OPT	(blastflags)			{ blastflags = 0; }
-	PARAM_FIXED_OPT	(strength)				{ strength = 255*FRACUNIT; }
+	PARAM_FLOAT_OPT	(strength)				{ strength = 255; }
 	PARAM_FLOAT_OPT	(radius)				{ radius = 255; }
 	PARAM_FLOAT_OPT	(speed)					{ speed = 20; }
 	PARAM_CLASS_OPT	(blasteffect, AActor)	{ blasteffect = PClass::FindActor("BlastEffect"); }
diff --git a/src/g_hexen/a_boostarmor.cpp b/src/g_hexen/a_boostarmor.cpp
index 2d6bde4e3..3234174f3 100644
--- a/src/g_hexen/a_boostarmor.cpp
+++ b/src/g_hexen/a_boostarmor.cpp
@@ -29,7 +29,7 @@ bool AArtiBoostArmor::Use (bool pickup)
 
 		for (int i = 0; i < 4; ++i)
 		{
-			armor = Spawn<AHexenArmor> (0,0,0, NO_REPLACE);
+			armor = Spawn<AHexenArmor>();
 			armor->flags |= MF_DROPPED;
 			armor->health = i;
 			armor->Amount = 1;
@@ -46,7 +46,7 @@ bool AArtiBoostArmor::Use (bool pickup)
 	}
 	else
 	{
-		ABasicArmorBonus *armor = Spawn<ABasicArmorBonus> (0,0,0, NO_REPLACE);
+		ABasicArmorBonus *armor = Spawn<ABasicArmorBonus>();
 		armor->flags |= MF_DROPPED;
 		armor->SaveAmount = 50;
 		armor->MaxSaveAmount = 300;
diff --git a/src/g_hexen/a_clericflame.cpp b/src/g_hexen/a_clericflame.cpp
index 10aff1ca0..5b4eba2e8 100644
--- a/src/g_hexen/a_clericflame.cpp
+++ b/src/g_hexen/a_clericflame.cpp
@@ -14,7 +14,6 @@
 */
 
 const double FLAMESPEED	= 0.45;
-const fixed_t CFLAMERANGE	= 12*64*FRACUNIT;
 const double FLAMEROTSPEED	= 2.;
 
 static FRandom pr_missile ("CFlameMissile");
@@ -46,7 +45,7 @@ void ACFlameMissile::Effect ()
 	if (!--special1)
 	{
 		special1 = 4;
-		double newz = Z()-12;
+		double newz = Z() - 12;
 		if (newz < floorz)
 		{
 			newz = floorz;
@@ -114,7 +113,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_CFlameMissile)
 
 	int i;
 	DAngle an;
-	fixed_t dist;
+	double dist;
 	AActor *mo;
 	
 	self->renderflags &= ~RF_INVISIBLE;
@@ -122,13 +121,11 @@ DEFINE_ACTION_FUNCTION(AActor, A_CFlameMissile)
 	AActor *BlockingMobj = self->BlockingMobj;
 	if (BlockingMobj && BlockingMobj->flags&MF_SHOOTABLE)
 	{ // Hit something, so spawn the flame circle around the thing
-		dist = BlockingMobj->_f_radius()+18*FRACUNIT;
+		dist = BlockingMobj->radius + 18;
 		for (i = 0; i < 4; i++)
 		{
 			an = i*45.;
-			mo = Spawn ("CircleFlame", BlockingMobj->Vec3Offset(
-				xs_CRoundToInt(an.Cos()*dist), xs_CRoundToInt(an.Sin()*dist),
-				5*FRACUNIT), ALLOW_REPLACE);
+			mo = Spawn ("CircleFlame", BlockingMobj->Vec3Angle(dist, an, 5), ALLOW_REPLACE);
 			if (mo)
 			{
 				mo->Angles.Yaw = an;
@@ -138,9 +135,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_CFlameMissile)
 				mo->specialf2 = mo->Vel.Y;
 				mo->tics -= pr_missile()&3;
 			}
-			mo = Spawn ("CircleFlame", BlockingMobj->Vec3Offset(
-				-xs_CRoundToInt(an.Cos()*dist), -xs_CRoundToInt(an.Sin()*dist),
-				5*FRACUNIT), ALLOW_REPLACE);
+			mo = Spawn("CircleFlame", BlockingMobj->Vec3Angle(dist, an, 5), ALLOW_REPLACE);
 			if(mo)
 			{
 				mo->Angles.Yaw = an + 180.;
diff --git a/src/g_hexen/a_clericholy.cpp b/src/g_hexen/a_clericholy.cpp
index 7e61721cd..749ad3dad 100644
--- a/src/g_hexen/a_clericholy.cpp
+++ b/src/g_hexen/a_clericholy.cpp
@@ -63,7 +63,7 @@ IMPLEMENT_CLASS (ACWeapWraithverge)
 
 IMPLEMENT_CLASS (AHolySpirit)
 
-bool AHolySpirit::Slam (AActor *thing)
+bool AHolySpirit::Slam(AActor *thing)
 {
 	if (thing->flags&MF_SHOOTABLE && thing != target)
 	{
@@ -91,14 +91,14 @@ bool AHolySpirit::Slam (AActor *thing)
 				// ghost burns out faster when attacking players/bosses
 				health -= 6;
 			}
-			P_DamageMobj (thing, this, target, dam, NAME_Melee);
+			P_DamageMobj(thing, this, target, dam, NAME_Melee);
 			if (pr_spiritslam() < 128)
 			{
-				Spawn ("HolyPuff", Pos(), ALLOW_REPLACE);
-				S_Sound (this, CHAN_WEAPON, "SpiritAttack", 1, ATTN_NORM);
+				Spawn("HolyPuff", Pos(), ALLOW_REPLACE);
+				S_Sound(this, CHAN_WEAPON, "SpiritAttack", 1, ATTN_NORM);
 				if (thing->flags3&MF3_ISMONSTER && pr_spiritslam() < 128)
 				{
-					thing->Howl ();
+					thing->Howl();
 				}
 			}
 		}
@@ -110,7 +110,7 @@ bool AHolySpirit::Slam (AActor *thing)
 	return true;
 }
 
-bool AHolySpirit::SpecialBlastHandling (AActor *source, fixed_t strength)
+bool AHolySpirit::SpecialBlastHandling (AActor *source, double strength)
 {
 	if (tracer == source)
 	{
@@ -133,7 +133,6 @@ DEFINE_ACTION_FUNCTION(AActor, A_CHolyAttack2)
 	PARAM_ACTION_PROLOGUE;
 
 	int j;
-	int i;
 	AActor *mo;
 
 	for (j = 0; j < 4; j++)
@@ -145,21 +144,22 @@ DEFINE_ACTION_FUNCTION(AActor, A_CHolyAttack2)
 		}
 		switch (j)
 		{ // float bob index
+
 			case 0:
-				mo->special2 = pr_holyatk2(8 << BOBTOFINESHIFT); // upper-left
+				mo->WeaveIndexZ = pr_holyatk2() & 7; // upper-left
 				break;
 			case 1:
-				mo->special2 = FINEANGLES/2 + pr_holyatk2(8 << BOBTOFINESHIFT); // upper-right
+				mo->WeaveIndexZ = 32 + (pr_holyatk2() & 7); // upper-right
 				break;
 			case 2:
-				mo->special2 = (FINEANGLES/2 + pr_holyatk2(8 << BOBTOFINESHIFT)) << 16; // lower-left
+				mo->WeaveIndexXY = 32 + (pr_holyatk2() & 7); // lower-left
 				break;
 			case 3:
-				i = pr_holyatk2(8 << BOBTOFINESHIFT);
-				mo->special2 = ((FINEANGLES/2 + i) << 16) + FINEANGLES/2 + pr_holyatk2(8 << BOBTOFINESHIFT);
+				mo->WeaveIndexXY = 32 + (pr_holyatk2() & 7);
+				mo->WeaveIndexZ = 32 + (pr_holyatk2() & 7);
 				break;
 		}
-		mo->_f_SetZ(self->_f_Z());
+		mo->SetZ(self->Z());
 		mo->Angles.Yaw = self->Angles.Yaw + 67.5 - 45.*j;
 		mo->Thrust();
 		mo->target = self->target;
@@ -263,42 +263,41 @@ DEFINE_ACTION_FUNCTION(AActor, A_CHolyPalette)
 //
 //============================================================================
 
-static void CHolyTailFollow (AActor *actor, fixed_t dist)
+static void CHolyTailFollow(AActor *actor, double dist)
 {
 	AActor *child;
-	int an;
-	fixed_t oldDistance, newDistance;
+	DAngle an;
+	double oldDistance, newDistance;
 
 	while (actor)
 	{
 		child = actor->tracer;
 		if (child)
 		{
-			an = actor->__f_AngleTo(child) >> ANGLETOFINESHIFT;
-			oldDistance = child->AproxDistance (actor);
-			if (P_TryMove (child, actor->_f_X()+FixedMul(dist, finecosine[an]), 
-				actor->_f_Y()+FixedMul(dist, finesine[an]), true))
+			an = actor->AngleTo(child);
+			oldDistance = child->Distance2D(actor);
+			if (P_TryMove(child, actor->Pos().XY() + an.ToVector(dist), true))
 			{
-				newDistance = child->AproxDistance (actor)-FRACUNIT;
-				if (oldDistance < FRACUNIT)
+				newDistance = child->Distance2D(actor) - 1;
+				if (oldDistance < 1)
 				{
 					if (child->Z() < actor->Z())
 					{
-						child->_f_SetZ(actor->_f_Z()-dist);
+						child->SetZ(actor->Z() - dist);
 					}
 					else
 					{
-						child->_f_SetZ(actor->_f_Z()+dist);
+						child->SetZ(actor->Z() + dist);
 					}
 				}
 				else
 				{
-					child->_f_SetZ(actor->_f_Z() + Scale (newDistance, child->_f_Z()-actor->_f_Z(), oldDistance));
+					child->SetZ(actor->Z() + (newDistance * (child->Z() - actor->Z()) / oldDistance));
 				}
 			}
 		}
 		actor = child;
-		dist -= FRACUNIT;
+		dist -= 1;
 	}
 }
 
@@ -341,13 +340,11 @@ DEFINE_ACTION_FUNCTION(AActor, A_CHolyTail)
 	}
 	else
 	{
-		if (P_TryMove (self,
-			parent->_f_X() - 14*finecosine[parent->_f_angle()>>ANGLETOFINESHIFT],
-			parent->_f_Y() - 14*finesine[parent->_f_angle()>>ANGLETOFINESHIFT], true))
+		if (P_TryMove(self, parent->Vec2Angle(14., parent->Angles.Yaw, true), true))
 		{
-			self->_f_SetZ(parent->_f_Z()-5*FRACUNIT);
+			self->SetZ(parent->Z() - 5.);
 		}
-		CHolyTailFollow (self, 10*FRACUNIT);
+		CHolyTailFollow(self, 10);
 	}
 	return 0;
 }
@@ -380,24 +377,23 @@ static void CHolyFindTarget (AActor *actor)
 static void CHolySeekerMissile (AActor *actor, DAngle thresh, DAngle turnMax)
 {
 	int dir;
-	int dist;
 	DAngle delta;
 	AActor *target;
-	fixed_t newZ;
-	fixed_t deltaZ;
+	double newZ;
+	double deltaZ;
 
 	target = actor->tracer;
 	if (target == NULL)
 	{
 		return;
 	}
-	if(!(target->flags&MF_SHOOTABLE) 
-	|| (!(target->flags3&MF3_ISMONSTER) && !target->player))
+	if (!(target->flags&MF_SHOOTABLE)
+		|| (!(target->flags3&MF3_ISMONSTER) && !target->player))
 	{ // Target died/target isn't a player or creature
 		actor->tracer = NULL;
-		actor->flags &= ~(MF_NOCLIP|MF_SKULLFLY);
+		actor->flags &= ~(MF_NOCLIP | MF_SKULLFLY);
 		actor->flags |= MF_MISSILE;
-		CHolyFindTarget (actor);
+		CHolyFindTarget(actor);
 		return;
 	}
 	dir = P_FaceMobj (actor, target, &delta);
@@ -423,59 +419,24 @@ static void CHolySeekerMissile (AActor *actor, DAngle thresh, DAngle turnMax)
 		|| actor->Z() > target->Top()
 		|| actor->Top() < target->Z())
 	{
-		newZ = target->_f_Z()+((pr_holyseeker()*target->_f_height())>>8);
-		deltaZ = newZ - actor->_f_Z();
-		if (abs(deltaZ) > 15*FRACUNIT)
+		newZ = target->Z() + ((pr_holyseeker()*target->Height) / 256.);
+		deltaZ = newZ - actor->Z();
+		if (fabs(deltaZ) > 15)
 		{
 			if (deltaZ > 0)
 			{
-				deltaZ = 15*FRACUNIT;
+				deltaZ = 15;
 			}
 			else
 			{
-				deltaZ = -15*FRACUNIT;
+				deltaZ = -15;
 			}
 		}
-		dist = actor->AproxDistance (target);
-		dist = dist / actor->_f_speed();
-		if (dist < 1)
-		{
-			dist = 1;
-		}
-		actor->Vel.Z = FIXED2DBL(deltaZ / dist);
+		actor->Vel.Z = deltaZ / actor->DistanceBySpeed(target, actor->Speed);
 	}
 	return;
 }
 
-//============================================================================
-//
-// A_CHolyWeave
-//
-//============================================================================
-
-void CHolyWeave (AActor *actor, FRandom &pr_random)
-{
-	fixed_t newX, newY, newZ;
-	int weaveXY, weaveZ;
-	int angle;
-
-	weaveXY = actor->special2 >> 16;
-	weaveZ = actor->special2 & FINEMASK;
-	angle = (actor->_f_angle() + ANG90) >> ANGLETOFINESHIFT;
-	newX = actor->_f_X() - FixedMul(finecosine[angle], finesine[weaveXY] * 32);
-	newY = actor->_f_Y() - FixedMul(finesine[angle], finesine[weaveXY] * 32);
-	weaveXY = (weaveXY + pr_random(5 << BOBTOFINESHIFT)) & FINEMASK;
-	newX += FixedMul(finecosine[angle], finesine[weaveXY] * 32);
-	newY += FixedMul(finesine[angle], finesine[weaveXY] * 32);
-	P_TryMove(actor, newX, newY, true);
-	newZ = actor->_f_Z();
-	newZ -= finesine[weaveZ] * 16;
-	weaveZ = (weaveZ + pr_random(5 << BOBTOFINESHIFT)) & FINEMASK;
-	newZ += finesine[weaveZ] * 16;
-	actor->_f_SetZ(newZ);
-	actor->special2 = weaveZ + (weaveXY << 16);
-}
-
 //============================================================================
 //
 // A_CHolySeek
@@ -504,7 +465,10 @@ DEFINE_ACTION_FUNCTION(AActor, A_CHolySeek)
 			self->args[0] = 5+(pr_holyseek()/20);
 		}
 	}
-	CHolyWeave (self, pr_holyweave);
+
+	int xyspeed = (pr_holyweave() % 5);
+	int zspeed = (pr_holyweave() % 5);
+	A_Weave(self, xyspeed, zspeed, 4., 2.);
 	return 0;
 }
 
@@ -543,7 +507,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_ClericAttack)
 
 	if (!self->target) return 0;
 
-	AActor * missile = P_SpawnMissileZ (self, self->_f_Z() + 40*FRACUNIT, self->target, PClass::FindActor ("HolyMissile"));
+	AActor * missile = P_SpawnMissileZ (self, self->Z() + 40., self->target, PClass::FindActor ("HolyMissile"));
 	if (missile != NULL) missile->tracer = NULL;	// No initial target
 	S_Sound (self, CHAN_WEAPON, "HolySymbolFire", 1, ATTN_NORM);
 	return 0;
diff --git a/src/g_hexen/a_clericmace.cpp b/src/g_hexen/a_clericmace.cpp
index 8715316f1..69f1f729c 100644
--- a/src/g_hexen/a_clericmace.cpp
+++ b/src/g_hexen/a_clericmace.cpp
@@ -44,7 +44,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_CMaceAttack)
 				if (t.linetarget != NULL)
 				{
 					AdjustPlayerAngle(player->mo, &t);
-					goto macedone;
+					return 0;
 				}
 			}
 		}
@@ -55,6 +55,5 @@ DEFINE_ACTION_FUNCTION(AActor, A_CMaceAttack)
 	angle = player->mo->Angles.Yaw;
 	slope = P_AimLineAttack (player->mo, angle, MELEERANGE);
 	P_LineAttack (player->mo, angle, MELEERANGE, slope, damage, NAME_Melee, hammertime);
-macedone:
 	return 0;		
 }
diff --git a/src/g_hexen/a_clericstaff.cpp b/src/g_hexen/a_clericstaff.cpp
index 2b6c88d6f..d936e8d1d 100644
--- a/src/g_hexen/a_clericstaff.cpp
+++ b/src/g_hexen/a_clericstaff.cpp
@@ -155,7 +155,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_CStaffMissileSlither)
 {
 	PARAM_ACTION_PROLOGUE;
 
-	A_Weave(self, 3, 0, FRACUNIT, 0);
+	A_Weave(self, 3, 0, 1., 0.);
 	return 0;
 }
 
diff --git a/src/g_hexen/a_dragon.cpp b/src/g_hexen/a_dragon.cpp
index 088d2de13..c94be3988 100644
--- a/src/g_hexen/a_dragon.cpp
+++ b/src/g_hexen/a_dragon.cpp
@@ -29,8 +29,8 @@ static void DragonSeek (AActor *actor, DAngle thresh, DAngle turnMax)
 	DAngle delta;
 	AActor *target;
 	int i;
-	angle_t bestAngle;
-	angle_t angleToSpot, angleToTarget;
+	DAngle bestAngle;
+	DAngle angleToSpot, angleToTarget;
 	AActor *mo;
 
 	target = actor->tracer;
@@ -66,8 +66,8 @@ static void DragonSeek (AActor *actor, DAngle thresh, DAngle turnMax)
 	if (target->flags&MF_SHOOTABLE && pr_dragonseek() < 64)
 	{ // attack the destination mobj if it's attackable
 		AActor *oldTarget;
-
-		if (absangle(actor->_f_angle() - actor->__f_AngleTo(target)) < ANGLE_45/2)
+		
+		if (absangle(actor->Angles.Yaw, actor->AngleTo(target)) < 22.5)
 		{
 			oldTarget = actor->target;
 			actor->target = target;
@@ -91,8 +91,8 @@ static void DragonSeek (AActor *actor, DAngle thresh, DAngle turnMax)
 		if (actor->target && pr_dragonseek() < 200)
 		{
 			AActor *bestActor = NULL;
-			bestAngle = ANGLE_MAX;
-			angleToTarget = actor->__f_AngleTo(actor->target);
+			bestAngle = 360.;
+			angleToTarget = actor->AngleTo(actor->target);
 			for (i = 0; i < 5; i++)
 			{
 				if (!target->args[i])
@@ -105,10 +105,11 @@ static void DragonSeek (AActor *actor, DAngle thresh, DAngle turnMax)
 				{
 					continue;
 				}
-				angleToSpot = actor->__f_AngleTo(mo);
-				if (absangle(angleToSpot-angleToTarget) < bestAngle)
+				angleToSpot = actor->AngleTo(mo);
+				DAngle diff = absangle(angleToSpot, angleToTarget);
+				if (diff < bestAngle)
 				{
-					bestAngle = absangle(angleToSpot-angleToTarget);
+					bestAngle = diff;
 					bestActor = mo;
 				}
 			}
@@ -176,7 +177,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_DragonFlight)
 {
 	PARAM_ACTION_PROLOGUE;
 
-	angle_t angle;
+	DAngle angle;
 
 	DragonSeek (self, 4., 8.);
 	if (self->target)
@@ -186,15 +187,15 @@ DEFINE_ACTION_FUNCTION(AActor, A_DragonFlight)
 			self->target = NULL;
 			return 0;
 		}
-		angle = self->__f_AngleTo(self->target);
-		if (absangle(self->_f_angle()-angle) < ANGLE_45/2 && self->CheckMeleeRange())
+		angle = absangle(self->Angles.Yaw, self->AngleTo(self->target));
+		if (angle <22.5 && self->CheckMeleeRange())
 		{
 			int damage = pr_dragonflight.HitDice (8);
 			int newdam = P_DamageMobj (self->target, self, self, damage, NAME_Melee);
 			P_TraceBleed (newdam > 0 ? newdam : damage, self->target, self);
 			S_Sound (self, CHAN_WEAPON, self->AttackSound, 1, ATTN_NORM);
 		}
-		else if (absangle(self->_f_angle()-angle) <= ANGLE_1*20)
+		else if (angle <= 20)
 		{
 			self->SetState (self->MissileState);
 			S_Sound (self, CHAN_WEAPON, self->AttackSound, 1, ATTN_NORM);
@@ -260,9 +261,9 @@ DEFINE_ACTION_FUNCTION(AActor, A_DragonFX2)
 	delay = 16+(pr_dragonfx2()>>3);
 	for (i = 1+(pr_dragonfx2()&3); i; i--)
 	{
-		fixed_t xo = ((pr_dragonfx2() - 128) << 14);
-		fixed_t yo = ((pr_dragonfx2() - 128) << 14);
-		fixed_t zo = ((pr_dragonfx2() - 128) << 12);
+		double xo = (pr_dragonfx2() - 128) / 4.;
+		double yo = (pr_dragonfx2() - 128) / 4.;
+		double zo = (pr_dragonfx2() - 128) / 16.;
 
 		mo = Spawn ("DragonExplosion", self->Vec3Offset(xo, yo, zo), ALLOW_REPLACE);
 		if (mo)
diff --git a/src/g_hexen/a_fighterquietus.cpp b/src/g_hexen/a_fighterquietus.cpp
index abc8cf0c9..27e787d31 100644
--- a/src/g_hexen/a_fighterquietus.cpp
+++ b/src/g_hexen/a_fighterquietus.cpp
@@ -36,7 +36,7 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_DropWeaponPieces)
 		PClassActor *cls = j == 0 ?  p1 : j == 1 ? p2 : p3;
 		if (cls)
 		{
-			AActor *piece = Spawn (cls, self->_f_Pos(), ALLOW_REPLACE);
+			AActor *piece = Spawn (cls, self->Pos(), ALLOW_REPLACE);
 			if (piece != NULL)
 			{
 				piece->Vel = self->Vel + DAngle(i*120.).ToVector(1);
@@ -92,11 +92,11 @@ DEFINE_ACTION_FUNCTION(AActor, A_FSwordAttack)
 		if (!weapon->DepleteAmmo (weapon->bAltFire))
 			return 0;
 	}
-	P_SpawnPlayerMissile (self, 0, 0, -10*FRACUNIT, RUNTIME_CLASS(AFSwordMissile), self->Angles.Yaw + (45./4));
-	P_SpawnPlayerMissile (self, 0, 0,  -5*FRACUNIT, RUNTIME_CLASS(AFSwordMissile), self->Angles.Yaw + (45./8));
-	P_SpawnPlayerMissile (self, 0, 0,   0,		   RUNTIME_CLASS(AFSwordMissile), self->Angles.Yaw);
-	P_SpawnPlayerMissile (self, 0, 0,   5*FRACUNIT, RUNTIME_CLASS(AFSwordMissile), self->Angles.Yaw - (45./8));
-	P_SpawnPlayerMissile (self, 0, 0,  10*FRACUNIT, RUNTIME_CLASS(AFSwordMissile), self->Angles.Yaw - (45./4));
+	P_SpawnPlayerMissile (self, 0, 0, -10, RUNTIME_CLASS(AFSwordMissile), self->Angles.Yaw + (45./4));
+	P_SpawnPlayerMissile (self, 0, 0,  -5, RUNTIME_CLASS(AFSwordMissile), self->Angles.Yaw + (45./8));
+	P_SpawnPlayerMissile (self, 0, 0,   0, RUNTIME_CLASS(AFSwordMissile),  self->Angles.Yaw);
+	P_SpawnPlayerMissile (self, 0, 0,   5, RUNTIME_CLASS(AFSwordMissile), self->Angles.Yaw - (45./8));
+	P_SpawnPlayerMissile (self, 0, 0,  10, RUNTIME_CLASS(AFSwordMissile), self->Angles.Yaw - (45./4));
 	S_Sound (self, CHAN_WEAPON, "FighterSwordFire", 1, ATTN_NORM);
 	return 0;
 }
@@ -115,9 +115,9 @@ DEFINE_ACTION_FUNCTION(AActor, A_FSwordFlames)
 
 	for (i = 1+(pr_fswordflame()&3); i; i--)
 	{
-		fixed_t xo = ((pr_fswordflame() - 128) << 12);
-		fixed_t yo = ((pr_fswordflame() - 128) << 12);
-		fixed_t zo = ((pr_fswordflame() - 128) << 11);
+		double xo = (pr_fswordflame() - 128) / 16.;
+		double yo = (pr_fswordflame() - 128) / 16.;
+		double zo = (pr_fswordflame() - 128) / 8.;
 		Spawn ("FSwordFlame", self->Vec3Offset(xo, yo, zo), ALLOW_REPLACE);
 	}
 	return 0;
@@ -135,13 +135,11 @@ DEFINE_ACTION_FUNCTION(AActor, A_FighterAttack)
 
 	if (!self->target) return 0;
 
-	angle_t angle = self->_f_angle();
-
-	P_SpawnMissileAngle (self, RUNTIME_CLASS(AFSwordMissile), angle+ANG45/4, 0);
-	P_SpawnMissileAngle (self, RUNTIME_CLASS(AFSwordMissile), angle+ANG45/8, 0);
-	P_SpawnMissileAngle (self, RUNTIME_CLASS(AFSwordMissile), angle,         0);
-	P_SpawnMissileAngle (self, RUNTIME_CLASS(AFSwordMissile), angle-ANG45/8, 0);
-	P_SpawnMissileAngle (self, RUNTIME_CLASS(AFSwordMissile), angle-ANG45/4, 0);
+	P_SpawnMissileAngle(self, RUNTIME_CLASS(AFSwordMissile), self->Angles.Yaw + (45. / 4), 0);
+	P_SpawnMissileAngle(self, RUNTIME_CLASS(AFSwordMissile), self->Angles.Yaw + (45. / 8), 0);
+	P_SpawnMissileAngle(self, RUNTIME_CLASS(AFSwordMissile), self->Angles.Yaw, 0);
+	P_SpawnMissileAngle(self, RUNTIME_CLASS(AFSwordMissile), self->Angles.Yaw - (45. / 8), 0);
+	P_SpawnMissileAngle(self, RUNTIME_CLASS(AFSwordMissile), self->Angles.Yaw - (45. / 4), 0);
 	S_Sound (self, CHAN_WEAPON, "FighterSwordFire", 1, ATTN_NORM);
 	return 0;
 }
diff --git a/src/g_hexen/a_firedemon.cpp b/src/g_hexen/a_firedemon.cpp
index b35521200..712363167 100644
--- a/src/g_hexen/a_firedemon.cpp
+++ b/src/g_hexen/a_firedemon.cpp
@@ -9,7 +9,7 @@
 #include "thingdef/thingdef.h"
 */
 
-#define FIREDEMON_ATTACK_RANGE	64*8*FRACUNIT
+#define FIREDEMON_ATTACK_RANGE	(64*8.)
 
 static FRandom pr_firedemonrock ("FireDemonRock");
 static FRandom pr_smbounce ("SMBounce");
@@ -54,9 +54,9 @@ void A_FiredSpawnRock (AActor *actor)
 			break;
 	}
 
-	fixed_t xo = ((pr_firedemonrock() - 128) << 12);
-	fixed_t yo = ((pr_firedemonrock() - 128) << 12);
-	fixed_t zo = (pr_firedemonrock() << 11);
+	double xo = (pr_firedemonrock() - 128) / 16.;
+	double yo = (pr_firedemonrock() - 128) / 16.;
+	double zo = pr_firedemonrock() / 32.;
 	mo = Spawn (rtype, actor->Vec3Offset(xo, yo, zo), ALLOW_REPLACE);
 	if (mo)
 	{
@@ -138,13 +138,13 @@ DEFINE_ACTION_FUNCTION(AActor, A_FiredChase)
 	int weaveindex = self->special1;
 	AActor *target = self->target;
 	DAngle ang;
-	fixed_t dist;
+	double dist;
 
 	if (self->reactiontime) self->reactiontime--;
 	if (self->threshold) self->threshold--;
 
 	// Float up and down
-	self->_f_AddZ(finesine[weaveindex << BOBTOFINESHIFT] * 8);
+	self->AddZ(BobSin(weaveindex));
 	self->special1 = (weaveindex + 2) & 63;
 
 	// Ensure it stays above certain height
@@ -168,7 +168,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_FiredChase)
 	{
 		self->special2 = 0;
 		self->Vel.X = self->Vel.Y = 0;
-		dist = self->AproxDistance (target);
+		dist = self->Distance2D(target);
 		if (dist < FIREDEMON_ATTACK_RANGE)
 		{
 			if (pr_firedemonchase() < 30)
diff --git a/src/g_hexen/a_flechette.cpp b/src/g_hexen/a_flechette.cpp
index 19cb3132c..ccc2bf112 100644
--- a/src/g_hexen/a_flechette.cpp
+++ b/src/g_hexen/a_flechette.cpp
@@ -39,10 +39,7 @@ IMPLEMENT_CLASS (AArtiPoisonBag1)
 
 bool AArtiPoisonBag1::Use (bool pickup)
 {
-	angle_t angle = Owner->_f_angle() >> ANGLETOFINESHIFT;
-	AActor *mo;
-
-	mo = Spawn("PoisonBag", Owner->Vec3Offset(
+	AActor *mo = Spawn("PoisonBag", Owner->Vec3Offset(
 		16 * Owner->Angles.Yaw.Cos(),
 		24 * Owner->Angles.Yaw.Sin(),
 		-Owner->Floorclip + 8), ALLOW_REPLACE);
@@ -67,10 +64,7 @@ IMPLEMENT_CLASS (AArtiPoisonBag2)
 
 bool AArtiPoisonBag2::Use (bool pickup)
 {
-	angle_t angle = Owner->_f_angle() >> ANGLETOFINESHIFT;
-	AActor *mo;
-
-	mo = Spawn("FireBomb", Owner->Vec3Offset(
+	AActor *mo = Spawn("FireBomb", Owner->Vec3Offset(
 		16 * Owner->Angles.Yaw.Cos(),
 		24 * Owner->Angles.Yaw.Sin(),
 		-Owner->Floorclip + 8), ALLOW_REPLACE);
@@ -97,15 +91,15 @@ bool AArtiPoisonBag3::Use (bool pickup)
 {
 	AActor *mo;
 
-	mo = Spawn("ThrowingBomb", Owner->PosPlusZ(-Owner->_f_floorclip()+35*FRACUNIT + (Owner->player? Owner->player->crouchoffset : 0)), ALLOW_REPLACE);
+	mo = Spawn("ThrowingBomb", Owner->PosPlusZ(35. - Owner->Floorclip + (Owner->player? Owner->player->crouchoffset : 0)), ALLOW_REPLACE);
 	if (mo)
 	{
 		mo->Angles.Yaw = Owner->Angles.Yaw + (((pr_poisonbag() & 7) - 4) * (360./256.));
 
 		/* Original flight code from Hexen
-		 * mo->momz = 4*FRACUNIT+((player->lookdir)<<(FRACBITS-4));
-		 * mo->z += player->lookdir<<(FRACBITS-4);
-		 * P_ThrustMobj(mo, mo->_f_angle(), mo->info->speed);
+		 * mo->momz = 4*F.RACUNIT+((player->lookdir)<<(F.RACBITS-4));
+		 * mo->z += player->lookdir<<(F.RACBITS-4);
+		 * P_ThrustMobj(mo, mo->angle, mo->info->speed);
 		 * mo->momx += player->mo->momx>>1;
 		 * mo->momy += player->mo->momy>>1;
 		 */
@@ -265,7 +259,7 @@ AInventory *AArtiPoisonBag::CreateCopy (AActor *other)
 
 	AInventory *copy;
 	PClassActor *spawntype = GetFlechetteType(other);
-	copy = static_cast<AInventory *>(Spawn (spawntype, 0, 0, 0, NO_REPLACE));
+	copy = static_cast<AInventory *>(Spawn (spawntype));
 	copy->Amount = Amount;
 	copy->MaxAmount = MaxAmount;
 	GoAwayAndDie ();
@@ -324,7 +318,7 @@ int APoisonCloud::DoSpecialDamage (AActor *victim, int damage, FName damagetype)
 		}
 		else
 		{
-			dopoison = victim->player->poisoncount < (int)(4.f * level.teamdamage);
+			dopoison = victim->player->poisoncount < (int)(4. * level.teamdamage);
 		}
 
 		if (dopoison)
@@ -332,7 +326,7 @@ int APoisonCloud::DoSpecialDamage (AActor *victim, int damage, FName damagetype)
 			int damage = 15 + (pr_poisoncloudd()&15);
 			if (mate)
 			{
-				damage = (int)((double)damage * level.teamdamage);
+				damage = (int)(damage * level.teamdamage);
 			}
 			// Handle passive damage modifiers (e.g. PowerProtection)
 			if (victim->Inventory != NULL)
@@ -340,11 +334,7 @@ int APoisonCloud::DoSpecialDamage (AActor *victim, int damage, FName damagetype)
 				victim->Inventory->ModifyDamage(damage, damagetype, damage, true);
 			}
 			// Modify with damage factors
-			damage = FixedMul(damage, victim->DamageFactor);
-			if (damage > 0)
-			{
-				damage = DamageTypeDefinition::ApplyMobjDamageFactor(damage, damagetype, victim->GetClass()->DamageFactors);
-			}
+			damage = victim->ApplyDamageFactor(damagetype, damage);
 			if (damage > 0)
 			{
 				P_PoisonDamage (victim->player, this,
@@ -376,7 +366,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_PoisonBagInit)
 
 	AActor *mo;
 	
-	mo = Spawn<APoisonCloud> (self->PosPlusZ(28*FRACUNIT), ALLOW_REPLACE);
+	mo = Spawn<APoisonCloud> (self->PosPlusZ(28.), ALLOW_REPLACE);
 	if (mo)
 	{
 		mo->target = self->target;
@@ -419,7 +409,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_PoisonBagDamage)
 	
 	P_RadiusAttack (self, self->target, 4, 40, self->DamageType, RADF_HURTSOURCE);
 	bobIndex = self->special2;
-	self->_f_AddZ(finesine[bobIndex << BOBTOFINESHIFT] >> 1);
+	self->AddZ(BobSin(bobIndex) / 16);
 	self->special2 = (bobIndex + 1) & 63;
 	return 0;
 }
@@ -452,8 +442,6 @@ DEFINE_ACTION_FUNCTION(AActor, A_CheckThrowBomb2)
 	PARAM_ACTION_PROLOGUE;
 
 	// [RH] Check using actual velocity, although the vel.z < 2 check still stands
-	//if (abs(self->vel.x) < FRACUNIT*3/2 && abs(self->vel.y) < FRACUNIT*3/2
-	//	&& self->vel.z < 2*FRACUNIT)
 	if (self->Vel.Z < 2 && self->Vel.LengthSquared() < (9./4.))
 	{
 		self->SetState (self->SpawnState + 6);
diff --git a/src/g_hexen/a_flies.cpp b/src/g_hexen/a_flies.cpp
index 9714f6a72..1023c12ae 100644
--- a/src/g_hexen/a_flies.cpp
+++ b/src/g_hexen/a_flies.cpp
@@ -86,9 +86,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_FlyBuzz)
 
 	self->Angles.Yaw = self->AngleTo(targ);
 	self->args[0]++;
-	angle_t ang = self->__f_AngleTo(targ);
-	ang >>= ANGLETOFINESHIFT;
-	if (!P_TryMove(self, self->_f_X() + 6 * finecosine[ang], self->_f_Y() + 6 * finesine[ang], true))
+	if (!P_TryMove(self, self->Pos().XY() + self->Angles.Yaw.ToVector(6), true))
 	{
 		self->SetIdle(true);
 		return 0;
diff --git a/src/g_hexen/a_fog.cpp b/src/g_hexen/a_fog.cpp
index 90c069223..b89f8d38c 100644
--- a/src/g_hexen/a_fog.cpp
+++ b/src/g_hexen/a_fog.cpp
@@ -15,7 +15,7 @@ static FRandom pr_fogspawn ("FogSpawn");
 //		args[3]		Lifetime countdown
 //		args[4]		Boolean: fog moving?
 //		special1	Internal:  Counter for spawn frequency
-//		special2	Internal:  Index into floatbob table
+//		WeaveIndexZ	Internal:  Index into floatbob table
 //
 //==========================================================================
 
@@ -37,7 +37,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_FogSpawn)
 	};
 
 	AActor *mo = NULL;
-	angle_t delta;
+	int delta;
 
 	if (self->special1-- > 0)
 	{
@@ -57,7 +57,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_FogSpawn)
 		mo->args[0] = (pr_fogspawn() % (self->args[0]))+1;	// Random speed
 		mo->args[3] = self->args[3];						// Set lifetime
 		mo->args[4] = 1;									// Set to moving
-		mo->special2 = pr_fogspawn()&63;
+		mo->WeaveIndexZ = pr_fogspawn()&63;
 	}
 	return 0;
 }
@@ -72,7 +72,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_FogMove)
 {
 	PARAM_ACTION_PROLOGUE;
 
-	int speed = self->args[0]<<FRACBITS;
+	double speed = self->args[0];
 	int weaveindex;
 
 	if (!self->args[4])
@@ -88,9 +88,9 @@ DEFINE_ACTION_FUNCTION(AActor, A_FogMove)
 
 	if ((self->args[3] % 4) == 0)
 	{
-		weaveindex = self->special2;
-		self->_f_AddZ(finesine[weaveindex << BOBTOFINESHIFT] * 4);
-		self->special2 = (weaveindex + 1) & 63;
+		weaveindex = self->WeaveIndexZ;
+		self->AddZ(BobSin(weaveindex) / 2);
+		self->WeaveIndexZ = (weaveindex + 1) & 63;
 	}
 
 	self->VelFromAngle(speed);
diff --git a/src/g_hexen/a_healingradius.cpp b/src/g_hexen/a_healingradius.cpp
index 2563df089..c381f3964 100644
--- a/src/g_hexen/a_healingradius.cpp
+++ b/src/g_hexen/a_healingradius.cpp
@@ -12,7 +12,7 @@
 #include "doomstat.h"
 */
 
-#define HEAL_RADIUS_DIST	255*FRACUNIT
+#define HEAL_RADIUS_DIST	255.
 
 static FRandom pr_healradius ("HealRadius");
 
@@ -42,7 +42,7 @@ bool AArtiHealingRadius::Use (bool pickup)
 		if (playeringame[i] &&
 			players[i].mo != NULL &&
 			players[i].mo->health > 0 &&
-			players[i].mo->AproxDistance (Owner) <= HEAL_RADIUS_DIST)
+			players[i].mo->Distance2D (Owner) <= HEAL_RADIUS_DIST)
 		{
 			// Q: Is it worth it to make this selectable as a player property?
 			// A: Probably not - but it sure doesn't hurt.
@@ -52,7 +52,7 @@ bool AArtiHealingRadius::Use (bool pickup)
 			case NAME_Armor:
 				for (int j = 0; j < 4; ++j)
 				{
-					AHexenArmor *armor = Spawn<AHexenArmor> (0,0,0, NO_REPLACE);
+					AHexenArmor *armor = Spawn<AHexenArmor> ();
 					armor->health = j;
 					armor->Amount = 1;
 					if (!armor->CallTryPickup (players[i].mo))
diff --git a/src/g_hexen/a_heresiarch.cpp b/src/g_hexen/a_heresiarch.cpp
index 87a3d17ae..d6ce35d18 100644
--- a/src/g_hexen/a_heresiarch.cpp
+++ b/src/g_hexen/a_heresiarch.cpp
@@ -16,7 +16,7 @@
 //	Sorcerer stuff
 //
 // Sorcerer Variables
-//		special1		Angle of ball 1 (all others relative to that)
+//		specialf1		Angle of ball 1 (all others relative to that)
 //		StopBall		which ball to stop at in stop mode (MT_???)
 //		args[0]			Defense time
 //		args[1]			Number of full rotations since stopping mode
@@ -24,7 +24,7 @@
 //		args[3]			Movement mode (see SORC_ macros)
 //		args[4]			Current ball orbit speed
 //	Sorcerer Ball Variables
-//		special1		Previous angle of ball (for woosh)
+//		specialf1		Previous angle of ball (for woosh)
 //		special2		Countdown of rapid fire (FX4)
 //============================================================================
 
@@ -45,9 +45,9 @@
 #define SORC_NORMAL			5
 #define SORC_FIRING_SPELL	6
 
-#define BALL1_ANGLEOFFSET	0
-#define BALL2_ANGLEOFFSET	(ANGLE_MAX/3)
-#define BALL3_ANGLEOFFSET	((ANGLE_MAX/3)*2)
+#define BALL1_ANGLEOFFSET	0.
+#define BALL2_ANGLEOFFSET	120.
+#define BALL3_ANGLEOFFSET	240.
 
 void A_SlowBalls (AActor *actor);
 void A_StopBalls (AActor *actor);
@@ -65,6 +65,7 @@ class AHeresiarch : public AActor
 	DECLARE_CLASS (AHeresiarch, AActor)
 public:
 	const PClass *StopBall;
+	DAngle BallAngle;
 
 	void Serialize (FArchive &arc);
 	void Die (AActor *source, AActor *inflictor, int dmgflags);
@@ -75,7 +76,7 @@ IMPLEMENT_CLASS (AHeresiarch)
 void AHeresiarch::Serialize (FArchive &arc)
 {
 	Super::Serialize (arc);
-	arc << StopBall;
+	arc << StopBall << BallAngle;
 }
 
 void AHeresiarch::Die (AActor *source, AActor *inflictor, int dmgflags)
@@ -101,15 +102,16 @@ public:
 	virtual void DoFireSpell ();
 	virtual void SorcUpdateBallAngle ();
 	virtual void CastSorcererSpell ();
-	angle_t AngleOffset;
+	DAngle AngleOffset;
+	DAngle OldAngle;
 
 	void Serialize (FArchive &arc)
 	{
 		Super::Serialize (arc);
-		arc << AngleOffset;
+		arc << AngleOffset << OldAngle;
 	}
 
-	bool SpecialBlastHandling (AActor *source, fixed_t strength)
+	bool SpecialBlastHandling (AActor *source, double strength)
 	{ // don't blast sorcerer balls
 		return false;
 	}
@@ -169,26 +171,6 @@ IMPLEMENT_CLASS (ASorcBall3)
 
 // Sorcerer spell 1 (The burning, bouncing head thing) ----------------------
 
-/*
-class ASorcFX1 : public AActor
-{
-	DECLARE_CLASS (ASorcFX1, AActor)
-public:
-	bool FloorBounceMissile (secplane_t &plane)
-	{
-		fixed_t orgvelz = vel.z;
-
-		if (!Super::FloorBounceMissile (plane))
-		{
-			vel.z = -orgvelz;		// no energy absorbed
-			return false;
-		}
-		return true;
-	}
-};
-IMPLEMENT_CLASS (ASorcFX1)
-*/
-
 //============================================================================
 //
 // SorcBall::DoFireSpell
@@ -231,7 +213,7 @@ void ASorcBall1::DoFireSpell ()
 
 DEFINE_ACTION_FUNCTION(AActor, A_SorcSpinBalls)
 {
-	PARAM_ACTION_PROLOGUE;
+	PARAM_ACTION_PROLOGUE_TYPE(AHeresiarch);
 
 	AActor *mo;
 
@@ -240,7 +222,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_SorcSpinBalls)
 	self->args[0] = 0;								// Currently no defense
 	self->args[3] = SORC_NORMAL;
 	self->args[4] = SORCBALL_INITIAL_SPEED;		// Initial orbit speed
-	self->special1 = ANGLE_1;
+	self->BallAngle = 1.;
 
 	DVector3 pos = self->PosPlusZ(-self->Floorclip + self->Height);
 	
@@ -262,11 +244,12 @@ DEFINE_ACTION_FUNCTION(AActor, A_SorcSpinBalls)
 //
 // A_SorcBallOrbit
 //
+// - actor is ball
 //============================================================================
 
 DEFINE_ACTION_FUNCTION(AActor, A_SorcBallOrbit)
 {
-	PARAM_ACTION_PROLOGUE;
+	PARAM_ACTION_PROLOGUE_TYPE(ASorcBall);
 
 	// [RH] If no parent, then die instead of crashing
 	if (self->target == NULL)
@@ -275,78 +258,78 @@ DEFINE_ACTION_FUNCTION(AActor, A_SorcBallOrbit)
 		return 0;
 	}
 
-	ASorcBall *actor;
-	angle_t angle, baseangle;
 	int mode = self->target->args[3];
 	AHeresiarch *parent = barrier_cast<AHeresiarch *>(self->target);
-	int dist = parent->_f_radius() - (self->_f_radius()<<1);
-	angle_t prevangle = self->special1;
+	double dist = parent->radius - (self->radius*2);
 
+#if 0
+	// This cannot happen anymore because this is defined locally in SorcBall
 	if (!self->IsKindOf (RUNTIME_CLASS(ASorcBall)))
 	{
 		I_Error ("Corrupted sorcerer:\nTried to use a %s", self->GetClass()->TypeName.GetChars());
 	}
-	actor = static_cast<ASorcBall *> (self);
+#endif
 
-	if (actor->target->health <= 0)
+	if (self->target->health <= 0)
 	{
-		actor->SetState (actor->FindState(NAME_Pain));
+		self->SetState (self->FindState(NAME_Pain));
 		return 0;
 	}
 
-	baseangle = (angle_t)parent->special1;
-	angle = baseangle + actor->AngleOffset;
-	actor->Angles.Yaw = ANGLE2FLOAT(angle);
-	angle >>= ANGLETOFINESHIFT;
+	DAngle prevangle = self->OldAngle;
+	DAngle baseangle = parent->BallAngle;
+	DAngle angle = baseangle + self->AngleOffset;
+
+	self->Angles.Yaw = angle;
 
 	switch (mode)
 	{
 	case SORC_NORMAL:			// Balls rotating normally
-		actor->SorcUpdateBallAngle ();
+		self->SorcUpdateBallAngle ();
 		break;
 
 	case SORC_DECELERATE:		// Balls decelerating
-		A_DecelBalls(actor);
-		actor->SorcUpdateBallAngle ();
+		A_DecelBalls(self);
+		self->SorcUpdateBallAngle ();
 		break;
 
 	case SORC_ACCELERATE:		// Balls accelerating
-		A_AccelBalls(actor);
-		actor->SorcUpdateBallAngle ();
+		A_AccelBalls(self);
+		self->SorcUpdateBallAngle ();
 		break;
 
 	case SORC_STOPPING:			// Balls stopping
-		if ((parent->StopBall == actor->GetClass()) &&
+		if ((parent->StopBall == self->GetClass()) &&
 			 (parent->args[1] > SORCBALL_SPEED_ROTATIONS) &&
-			 (absangle(angle - (parent->_f_angle()>>ANGLETOFINESHIFT)) < (30<<5)))
+			 absangle(angle, parent->Angles.Yaw) < 42.1875)
 		{
 			// Can stop now
-			actor->target->args[3] = SORC_FIRESPELL;
-			actor->target->args[4] = 0;
+			self->target->args[3] = SORC_FIRESPELL;
+			self->target->args[4] = 0;
 			// Set angle so self angle == sorcerer angle
-			parent->special1 = (int)(parent->_f_angle() - actor->AngleOffset);
+			parent->BallAngle = parent->Angles.Yaw - self->AngleOffset;
 		}
 		else
 		{
-			actor->SorcUpdateBallAngle ();
+			self->SorcUpdateBallAngle ();
 		}
 		break;
 
 	case SORC_FIRESPELL:			// Casting spell
-		if (parent->StopBall == actor->GetClass())
+		if (parent->StopBall == self->GetClass())
 		{
 			// Put sorcerer into special throw spell anim
 			if (parent->health > 0)
 				parent->SetState (parent->FindState("Attack1"));
 
-			actor->DoFireSpell ();
+			self->DoFireSpell ();
 		}
 		break;
 
 	case SORC_FIRING_SPELL:
-		if (parent->StopBall == actor->GetClass())
+		if (parent->StopBall == self->GetClass())
 		{
-			if (actor->special2-- <= 0)
+			if (self->special2-- <= 0)
 			{
 				// Done rapid firing 
 				parent->args[3] = SORC_STOPPED;
@@ -357,7 +340,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_SorcBallOrbit)
 			else
 			{
 				// Do rapid fire spell
-				A_SorcOffense2(actor);
+				A_SorcOffense2(self);
 			}
 		}
 		break;
@@ -367,21 +350,18 @@ DEFINE_ACTION_FUNCTION(AActor, A_SorcBallOrbit)
 		break;
 	}
 
-	if ((angle < prevangle) && (parent->args[4]==SORCBALL_TERMINAL_SPEED))
+	if (deltaangle(angle, prevangle) < 0 && (parent->args[4]==SORCBALL_TERMINAL_SPEED))
 	{
 		parent->args[1]++;			// Bump rotation counter
 		// Completed full rotation - make woosh sound
-		S_Sound (actor, CHAN_BODY, "SorcererBallWoosh", 1, ATTN_NORM);
+		S_Sound (self, CHAN_BODY, "SorcererBallWoosh", 1, ATTN_NORM);
 	}
-	actor->special1 = angle;		// Set previous angle
+	self->OldAngle = angle;		// Set previous angle
 
-	fixedvec3 pos = parent->Vec3Offset(
-		FixedMul(dist, finecosine[angle]),
-		FixedMul(dist, finesine[angle]),
-		-parent->_f_floorclip() + parent->_f_height());
-	actor->SetOrigin (pos, true);
-	actor->floorz = parent->floorz;
-	actor->ceilingz = parent->ceilingz;
+	DVector3 pos = parent->Vec3Angle(dist, angle, -parent->Floorclip + parent->Height);
+	self->SetOrigin (pos, true);
+	self->floorz = parent->floorz;
+	self->ceilingz = parent->ceilingz;
 	return 0;
 }
 
@@ -411,10 +391,10 @@ DEFINE_ACTION_FUNCTION(AActor, A_SpeedBalls)
 //
 //============================================================================
 
-void A_SlowBalls(AActor *actor)
+void A_SlowBalls(AActor *self)
 {
-	actor->args[3] = SORC_DECELERATE;				// slow mode
-	actor->args[2] = SORCBALL_INITIAL_SPEED;		// target speed
+	self->args[3] = SORC_DECELERATE;				// slow mode
+	self->args[2] = SORCBALL_INITIAL_SPEED;		// target speed
 }
 
 //============================================================================
@@ -428,23 +408,23 @@ void A_SlowBalls(AActor *actor)
 
 void A_StopBalls(AActor *scary)
 {
-	AHeresiarch *actor = static_cast<AHeresiarch *> (scary);
+	AHeresiarch *self = static_cast<AHeresiarch *> (scary);
 	int chance = pr_heresiarch();
-	actor->args[3] = SORC_STOPPING;				// stopping mode
-	actor->args[1] = 0;							// Reset rotation counter
+	self->args[3] = SORC_STOPPING;				// stopping mode
+	self->args[1] = 0;							// Reset rotation counter
 
-	if ((actor->args[0] <= 0) && (chance < 200))
+	if ((self->args[0] <= 0) && (chance < 200))
 	{
-		actor->StopBall = RUNTIME_CLASS(ASorcBall2);	// Blue
+		self->StopBall = RUNTIME_CLASS(ASorcBall2);	// Blue
 	}
-	else if((actor->health < (actor->SpawnHealth() >> 1)) &&
+	else if((self->health < (self->SpawnHealth() >> 1)) &&
 			(chance < 200))
 	{
-		actor->StopBall = RUNTIME_CLASS(ASorcBall3);	// Green
+		self->StopBall = RUNTIME_CLASS(ASorcBall3);	// Green
 	}
 	else
 	{
-		actor->StopBall = RUNTIME_CLASS(ASorcBall1);	// Yellow
+		self->StopBall = RUNTIME_CLASS(ASorcBall1);	// Yellow
 	}
 }
 
@@ -456,9 +436,9 @@ void A_StopBalls(AActor *scary)
 //
 //============================================================================
 
-void A_AccelBalls(AActor *actor)
+void A_AccelBalls(AActor *self)
 {
-	AActor *sorc = actor->target;
+	AActor *sorc = self->target;
 
 	if (sorc->args[4] < sorc->args[2])
 	{
@@ -483,9 +463,9 @@ void A_AccelBalls(AActor *actor)
 //
 //============================================================================
 
-void A_DecelBalls(AActor *actor)
+void A_DecelBalls(AActor *self)
 {
-	AActor *sorc = actor->target;
+	AActor *sorc = self->target;
 
 	if (sorc->args[4] > sorc->args[2])
 	{
@@ -506,7 +486,7 @@ void A_DecelBalls(AActor *actor)
 
 void ASorcBall1::SorcUpdateBallAngle ()
 {
-	target->special1 += ANGLE_1*target->args[4];
+	barrier_cast<AHeresiarch*>(target)->BallAngle += target->args[4];
 }
 
 //============================================================================
@@ -551,7 +531,7 @@ void ASorcBall2::CastSorcererSpell ()
 	AActor *parent = target;
 	AActor *mo;
 
-	mo = Spawn("SorcFX2", PosPlusZ(-parent->_f_floorclip() + SORC_DEFENSE_HEIGHT*FRACUNIT), ALLOW_REPLACE);
+	mo = Spawn("SorcFX2", PosPlusZ(parent->Floorclip + SORC_DEFENSE_HEIGHT), ALLOW_REPLACE);
 	parent->flags2 |= MF2_REFLECTIVE|MF2_INVULNERABLE;
 	parent->args[0] = SORC_DEFENSE_TIME;
 	if (mo) mo->target = parent;
@@ -570,24 +550,24 @@ void ASorcBall3::CastSorcererSpell ()
 	Super::CastSorcererSpell ();
 
 	AActor *mo;
-	angle_t ang1, ang2;
+	DAngle ang1, ang2;
 	AActor *parent = target;
 
-	ang1 = FLOAT2ANGLE(Angles.Yaw.Degrees) - ANGLE_45;
-	ang2 = FLOAT2ANGLE(Angles.Yaw.Degrees) + ANGLE_45;
+	ang1 = Angles.Yaw.Degrees - 45;
+	ang2 = Angles.Yaw.Degrees + 45;
 	PClassActor *cls = PClass::FindActor("SorcFX3");
 	if (health < (SpawnHealth()/3))
 	{	// Spawn 2 at a time
-		mo = P_SpawnMissileAngle(parent, cls, ang1, 4*FRACUNIT);
+		mo = P_SpawnMissileAngle(parent, cls, ang1, 4.);
 		if (mo) mo->target = parent;
-		mo = P_SpawnMissileAngle(parent, cls, ang2, 4*FRACUNIT);
+		mo = P_SpawnMissileAngle(parent, cls, ang2, 4.);
 		if (mo) mo->target = parent;
 	}			
 	else
 	{
 		if (pr_heresiarch() < 128)
 			ang1 = ang2;
-		mo = P_SpawnMissileAngle(parent, cls, ang1, 4*FRACUNIT);
+		mo = P_SpawnMissileAngle(parent, cls, ang1, 4.);
 		if (mo) mo->target = parent;
 	}
 }
@@ -596,12 +576,12 @@ void ASorcBall3::CastSorcererSpell ()
 /*
 void A_SpawnReinforcements(AActor *actor)
 {
-	AActor *parent = actor->target;
+	AActor *parent = self->target;
 	AActor *mo;
-	angle_t ang;
+	DAngle ang;
 
-	ang = ANGLE_1 * P_Random();
-	mo = P_SpawnMissileAngle(actor, MT_SORCFX3, ang, 5*FRACUNIT);
+	ang = P_Random();
+	mo = P_SpawnMissileAngle(actor, MT_SORCFX3, ang, 5.);
 	if (mo) mo->target = parent;
 }
 */
@@ -619,11 +599,11 @@ void ASorcBall1::CastSorcererSpell ()
 	Super::CastSorcererSpell ();
 
 	AActor *mo;
-	angle_t ang1, ang2;
+	DAngle ang1, ang2;
 	AActor *parent = target;
 
-	ang1 = FLOAT2ANGLE(Angles.Yaw.Degrees) + ANGLE_1*70;
-	ang2 = FLOAT2ANGLE(Angles.Yaw.Degrees) - ANGLE_1*70;
+	ang1 = Angles.Yaw.Degrees + 70;
+	ang2 = Angles.Yaw.Degrees - 70;
 	PClassActor *cls = PClass::FindActor("SorcFX1");
 	mo = P_SpawnMissileAngle (parent, cls, ang1, 0);
 	if (mo)
@@ -651,12 +631,13 @@ void ASorcBall1::CastSorcererSpell ()
 //
 //============================================================================
 
-void A_SorcOffense2(AActor *actor)
+void A_SorcOffense2(AActor *self)
 {
-	angle_t ang1;
+	DAngle ang1;
 	AActor *mo;
-	int delta, index;
-	AActor *parent = actor->target;
+	double delta;
+	int index;
+	AActor *parent = self->target;
 	AActor *dest = parent->target;
 	double dist;
 
@@ -666,11 +647,11 @@ void A_SorcOffense2(AActor *actor)
 		return;
 	}
 
-	index = actor->args[4] << 5;
-	actor->args[4] = (actor->args[4] + 15) & 255;
-	delta = (finesine[index])*SORCFX4_SPREAD_ANGLE;
-	delta = (delta>>FRACBITS)*ANGLE_1;
-	ang1 = actor->_f_angle() + delta;
+	index = self->args[4];
+	self->args[4] = (self->args[4] + 15) & 255;
+	delta = DAngle(index * (360 / 256.f)).Sin() * SORCFX4_SPREAD_ANGLE;
+
+	ang1 = self->Angles.Yaw + delta;
 	mo = P_SpawnMissileAngle(parent, PClass::FindActor("SorcFX4"), ang1, 0);
 	if (mo)
 	{
@@ -708,13 +689,12 @@ DEFINE_ACTION_FUNCTION(AActor, A_SorcBossAttack)
 DEFINE_ACTION_FUNCTION(AActor, A_SpawnFizzle)
 {
 	PARAM_ACTION_PROLOGUE;
-	fixed_t dist = 5*FRACUNIT;
 	int speed = (int)self->Speed;
 	DAngle rangle;
 	AActor *mo;
 	int ix;
 
-	fixedvec3 pos = self->_f_Vec3Angle(dist, self->_f_angle(), -self->_f_floorclip() + (self->_f_height() >> 1));
+	DVector3 pos = self->Vec3Angle(5., self->Angles.Yaw, -self->Floorclip + self->Height / 2. );
 	for (ix=0; ix<5; ix++)
 	{
 		mo = Spawn("SorcSpark1", pos, ALLOW_REPLACE);
@@ -743,7 +723,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_SorcFX1Seek)
 	PARAM_ACTION_PROLOGUE;
 
 	A_DoBounceCheck (self, "SorcererHeadScream");
-	P_SeekerMissile (self,ANGLE_1*2,ANGLE_1*6);
+	P_SeekerMissile(self, 2, 6);
 	return 0;
 }
 
@@ -757,7 +737,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_SorcFX1Seek)
 //============================================================================
 //
 // FX2 Variables
-//		special1		current angle
+//		specialf1		current angle
 //		special2
 //		args[0]		0 = CW,  1 = CCW
 //		args[1]		
@@ -775,7 +755,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_SorcFX2Split)
 	{
 		mo->target = self->target;
 		mo->args[0] = 0;									// CW
-		mo->special1 = self->_f_angle();					// Set angle
+		mo->specialf1 = self->Angles.Yaw.Degrees;			// Set angle
 		mo->SetState (mo->FindState("Orbit"));
 	}
 	mo = Spawn(self->GetClass(), self->Pos(), NO_REPLACE);
@@ -783,7 +763,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_SorcFX2Split)
 	{
 		mo->target = self->target;
 		mo->args[0] = 1;									// CCW
-		mo->special1 = self->_f_angle();					// Set angle
+		mo->specialf1 = self->Angles.Yaw.Degrees;			// Set angle
 		mo->SetState (mo->FindState("Orbit"));
 	}
 	self->Destroy ();
@@ -802,8 +782,8 @@ DEFINE_ACTION_FUNCTION(AActor, A_SorcFX2Orbit)
 {
 	PARAM_ACTION_PROLOGUE;
 
-	angle_t angle;
-	fixedvec3 pos;
+	DAngle angle;
+	DVector3 pos;
 	AActor *parent = self->target;
 
 	// [RH] If no parent, then disappear
@@ -813,7 +793,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_SorcFX2Orbit)
 		return 0;
 	}
 
-	fixed_t dist = parent->_f_radius();
+	double dist = parent->radius;
 
 	if ((parent->health <= 0) ||		// Sorcerer is dead
 		(!parent->args[0]))				// Time expired
@@ -834,25 +814,18 @@ DEFINE_ACTION_FUNCTION(AActor, A_SorcFX2Orbit)
 	// Move to new position based on angle
 	if (self->args[0])		// Counter clock-wise
 	{
-		self->special1 += ANGLE_1*10;
-		angle = ((angle_t)self->special1) >> ANGLETOFINESHIFT;
-		pos = parent->Vec3Offset(
-			FixedMul(dist, finecosine[angle]),
-			FixedMul(dist, finesine[angle]),
-			parent->_f_floorclip() + SORC_DEFENSE_HEIGHT*FRACUNIT);
-		pos.z += FixedMul(15*FRACUNIT,finecosine[angle]);
+		self->specialf1 += 10;
+		angle = self->specialf1;
+		pos = parent->Vec3Angle(dist, angle, parent->Floorclip + SORC_DEFENSE_HEIGHT);
+		pos.Z += 15 * angle.Cos();
 		// Spawn trailer
 		Spawn("SorcFX2T1", pos, ALLOW_REPLACE);
 	}
 	else							// Clock wise
 	{
-		self->special1 -= ANGLE_1*10;
-		angle = ((angle_t)self->special1) >> ANGLETOFINESHIFT;
-		pos = parent->Vec3Offset(
-			FixedMul(dist, finecosine[angle]),
-			FixedMul(dist, finesine[angle]),
-			parent->_f_floorclip() + SORC_DEFENSE_HEIGHT*FRACUNIT);
-		pos.z += FixedMul(20*FRACUNIT,finesine[angle]);
+		self->specialf1 -= 10;
+		pos = parent->Vec3Angle(dist, angle, parent->Floorclip + SORC_DEFENSE_HEIGHT);
+		pos.Z += 20 * angle.Sin();
 		// Spawn trailer
 		Spawn("SorcFX2T1", pos, ALLOW_REPLACE);
 	}
@@ -947,7 +920,6 @@ DEFINE_ACTION_FUNCTION(AActor, A_SorcBallPop)
 	self->Vel.X = ((pr_heresiarch()%10)-5);
 	self->Vel.Y = ((pr_heresiarch()%10)-5);
 	self->Vel.Z = (2+(pr_heresiarch()%3));
-	self->special2 = 4*FRACUNIT;		// Initial bounce factor
 	self->args[4] = BOUNCE_TIME_UNIT;	// Bounce time unit
 	self->args[3] = 5;					// Bounce time in seconds
 	return 0;
diff --git a/src/g_hexen/a_hexenglobal.h b/src/g_hexen/a_hexenglobal.h
index 5544afb24..3455b684d 100644
--- a/src/g_hexen/a_hexenglobal.h
+++ b/src/g_hexen/a_hexenglobal.h
@@ -10,7 +10,7 @@ class AHolySpirit : public AActor
 	DECLARE_CLASS (AHolySpirit, AActor)
 public:
 	bool Slam (AActor *thing);
-	bool SpecialBlastHandling (AActor *source, fixed_t strength);
+	bool SpecialBlastHandling (AActor *source, double strength);
 };
 
 class AFighterWeapon : public AWeapon
diff --git a/src/g_hexen/a_hexenspecialdecs.cpp b/src/g_hexen/a_hexenspecialdecs.cpp
index b3d1348ed..28de8d46a 100644
--- a/src/g_hexen/a_hexenspecialdecs.cpp
+++ b/src/g_hexen/a_hexenspecialdecs.cpp
@@ -117,7 +117,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_PotteryCheck)
 		if (playeringame[i])
 		{
 			AActor *pmo = players[i].mo;
-			if (P_CheckSight (self, pmo) && (absangle(pmo->__f_AngleTo(self) - pmo->_f_angle()) <= ANGLE_45))
+			if (P_CheckSight (self, pmo) && (absangle(pmo->AngleTo(self), pmo->Angles.Yaw) <= 45))
 			{ // Previous state (pottery bit waiting state)
 				self->SetState (self->state - 1);
 				return 0;
@@ -156,7 +156,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_CorpseBloodDrip)
 
 	if (pr_drip() <= 128)
 	{
-		Spawn ("CorpseBloodDrip", self->PosPlusZ(self->_f_height()/2), ALLOW_REPLACE);
+		Spawn ("CorpseBloodDrip", self->PosPlusZ(self->Height / 2), ALLOW_REPLACE);
 	}
 	return 0;
 }
@@ -186,7 +186,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_CorpseExplode)
 		}
 	}
 	// Spawn a skull
-	mo = Spawn ("CorpseBit", self->_f_Pos(), ALLOW_REPLACE);
+	mo = Spawn ("CorpseBit", self->Pos(), ALLOW_REPLACE);
 	if (mo)
 	{
 		mo->SetState (mo->SpawnState + 3);
@@ -214,9 +214,9 @@ DEFINE_ACTION_FUNCTION(AActor, A_LeafSpawn)
 
 	for (i = (pr_leaf()&3)+1; i; i--)
 	{
-		fixed_t xo = (pr_leaf.Random2() << 14);
-		fixed_t yo = (pr_leaf.Random2() << 14);
-		fixed_t zo = (pr_leaf() << 14);
+		double xo = pr_leaf.Random2() / 4.;
+		double yo = pr_leaf.Random2() / 4.;
+		double zo = pr_leaf() / 4.;
 		mo = Spawn (pr_leaf()&1 ? PClass::FindActor ("Leaf1") : PClass::FindActor ("Leaf2"),
 			self->Vec3Offset(xo, yo, zo), ALLOW_REPLACE);
 
@@ -289,7 +289,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_PoisonShroom)
 {
 	PARAM_ACTION_PROLOGUE;
 
-	self->tics = 128+(pr_shroom()<<1);
+	self->tics = 128 + (pr_shroom() << 1);
 	return 0;
 }
 
@@ -308,9 +308,9 @@ DEFINE_ACTION_FUNCTION(AActor, A_SoAExplode)
 
 	for (i = 0; i < 10; i++)
 	{
-		fixed_t xo = ((pr_soaexplode() - 128) << 12);
-		fixed_t yo = ((pr_soaexplode() - 128) << 12);
-		fixed_t zo = (pr_soaexplode()*self->_f_height() / 256);
+		double xo = (pr_soaexplode() - 128) / 16.;
+		double yo = (pr_soaexplode() - 128) / 16.;
+		double zo = pr_soaexplode()*self->Height / 256.;
 		mo = Spawn ("ZArmorChunk", self->Vec3Offset(xo, yo, zo), ALLOW_REPLACE);
 		if (mo)
 		{
diff --git a/src/g_hexen/a_iceguy.cpp b/src/g_hexen/a_iceguy.cpp
index fd7efe426..d00e86041 100644
--- a/src/g_hexen/a_iceguy.cpp
+++ b/src/g_hexen/a_iceguy.cpp
@@ -28,19 +28,15 @@ DEFINE_ACTION_FUNCTION(AActor, A_IceGuyLook)
 {
 	PARAM_ACTION_PROLOGUE;
 
-	fixed_t dist;
-	fixed_t an;
+	double dist;
+	DAngle an;
 
 	CALL_ACTION(A_Look, self);
 	if (pr_iceguylook() < 64)
 	{
-		dist = ((pr_iceguylook()-128)*self->_f_radius())>>7;
-		an = (self->_f_angle()+ANG90)>>ANGLETOFINESHIFT;
-
-		Spawn(WispTypes[pr_iceguylook() & 1], self->Vec3Offset(
-			FixedMul(dist, finecosine[an]),
-			FixedMul(dist, finesine[an]),
-			60 * FRACUNIT), ALLOW_REPLACE);
+		dist = (pr_iceguylook() - 128) * self->radius / 128.;
+		an = self->Angles.Yaw + 90;
+		Spawn(WispTypes[pr_iceguylook() & 1], self->Vec3Angle(dist, an, 60.), ALLOW_REPLACE);
 	}
 	return 0;
 }
@@ -55,20 +51,16 @@ DEFINE_ACTION_FUNCTION(AActor, A_IceGuyChase)
 {
 	PARAM_ACTION_PROLOGUE;
 
-	fixed_t dist;
-	fixed_t an;
+	double dist;
+	DAngle an;
 	AActor *mo;
 
-	A_Chase (stack, self);
+	A_Chase(stack, self);
 	if (pr_iceguychase() < 128)
 	{
-		dist = ((pr_iceguychase()-128)*self->_f_radius())>>7;
-		an = (self->_f_angle()+ANG90)>>ANGLETOFINESHIFT;
-
-		mo = Spawn(WispTypes[pr_iceguychase() & 1], self->Vec3Offset(
-			FixedMul(dist, finecosine[an]),
-			FixedMul(dist, finesine[an]),
-			60 * FRACUNIT), ALLOW_REPLACE);
+		dist = (pr_iceguychase() - 128) * self->radius / 128.;
+		an = self->Angles.Yaw + 90;
+		mo = Spawn(WispTypes[pr_iceguylook() & 1], self->Vec3Angle(dist, an, 60.), ALLOW_REPLACE);
 		if (mo)
 		{
 			mo->Vel = self->Vel;
@@ -92,8 +84,8 @@ DEFINE_ACTION_FUNCTION(AActor, A_IceGuyAttack)
 	{
 		return 0;
 	}
-	P_SpawnMissileXYZ(self->_f_Vec3Angle(self->_f_radius()>>1, self->_f_angle()+ANG90, 40*FRACUNIT), self, self->target, PClass::FindActor ("IceGuyFX"));
-	P_SpawnMissileXYZ(self->_f_Vec3Angle(self->_f_radius()>>1, self->_f_angle()-ANG90, 40*FRACUNIT), self, self->target, PClass::FindActor ("IceGuyFX"));
+	P_SpawnMissileXYZ(self->Vec3Angle(self->radius / 2, self->Angles.Yaw + 90, 40.), self, self->target, PClass::FindActor("IceGuyFX"));
+	P_SpawnMissileXYZ(self->Vec3Angle(self->radius / 2, self->Angles.Yaw - 90, 40.), self, self->target, PClass::FindActor("IceGuyFX"));
 	S_Sound (self, CHAN_WEAPON, self->AttackSound, 1, ATTN_NORM);
 	return 0;
 }
@@ -129,8 +121,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_IceGuyMissileExplode)
 
 	for (i = 0; i < 8; i++)
 	{
-		mo = P_SpawnMissileAngleZ (self, self->_f_Z()+3*FRACUNIT, 
-			PClass::FindActor("IceGuyFX2"), i*ANG45, (fixed_t)(-0.3*FRACUNIT));
+		mo = P_SpawnMissileAngleZ (self, self->Z()+3, PClass::FindActor("IceGuyFX2"), DAngle(i*45.), -0.3);
 		if (mo)
 		{
 			mo->target = self->target;
diff --git a/src/g_hexen/a_korax.cpp b/src/g_hexen/a_korax.cpp
index 0cb8f1149..2597fe8cd 100644
--- a/src/g_hexen/a_korax.cpp
+++ b/src/g_hexen/a_korax.cpp
@@ -37,16 +37,16 @@ const int KORAX_TID					= 245;
 const int KORAX_FIRST_TELEPORT_TID	= 248;
 const int KORAX_TELEPORT_TID		= 249;
 
-const int KORAX_DELTAANGLE			= 85*ANGLE_1;
+const int KORAX_DELTAANGLE			= 85;
 const int KORAX_ARM_EXTENSION_SHORT	= 40;
 const int KORAX_ARM_EXTENSION_LONG	= 55;
 
-const int KORAX_ARM1_HEIGHT			= 108*FRACUNIT;
-const int KORAX_ARM2_HEIGHT			= 82*FRACUNIT;
-const int KORAX_ARM3_HEIGHT			= 54*FRACUNIT;
-const int KORAX_ARM4_HEIGHT			= 104*FRACUNIT;
-const int KORAX_ARM5_HEIGHT			= 86*FRACUNIT;
-const int KORAX_ARM6_HEIGHT			= 53*FRACUNIT;
+const int KORAX_ARM1_HEIGHT			= 108;
+const int KORAX_ARM2_HEIGHT			= 82;
+const int KORAX_ARM3_HEIGHT			= 54;
+const int KORAX_ARM4_HEIGHT			= 104;
+const int KORAX_ARM5_HEIGHT			= 86;
+const int KORAX_ARM6_HEIGHT			= 53;
 
 const double KORAX_BOLT_HEIGHT		= 48.;
 const int KORAX_BOLT_LIFETIME		= 3;
@@ -76,8 +76,7 @@ void A_KBoltRaise (AActor *);
 
 void KoraxFire (AActor *actor, PClassActor *type, int arm);
 void KSpiritInit (AActor *spirit, AActor *korax);
-AActor *P_SpawnKoraxMissile (fixed_t x, fixed_t y, fixed_t z,
-	AActor *source, AActor *dest, PClassActor *type);
+AActor *P_SpawnKoraxMissile (const DVector3 &pos, AActor *source, AActor *dest, PClassActor *type);
 
 extern void SpawnSpiritTail (AActor *spirit);
 
@@ -99,7 +98,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_KoraxChase)
 		spot = iterator.Next ();
 		if (spot != NULL)
 		{
-			P_Teleport (self, spot->_f_X(), spot->_f_Y(), ONFLOORZ, spot->Angles.Yaw, TELF_SOURCEFOG | TELF_DESTFOG);
+			P_Teleport (self, spot->PosAtZ(ONFLOORZ), spot->Angles.Yaw, TELF_SOURCEFOG | TELF_DESTFOG);
 		}
 
 		P_StartScript (self, NULL, 249, NULL, NULL, 0, 0);
@@ -141,7 +140,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_KoraxChase)
 			self->tracer = spot;
 			if (spot)
 			{
-				P_Teleport (self, spot->_f_X(), spot->_f_Y(), ONFLOORZ, spot->Angles.Yaw, TELF_SOURCEFOG | TELF_DESTFOG);
+				P_Teleport (self, spot->PosAtZ(ONFLOORZ), spot->Angles.Yaw, TELF_SOURCEFOG | TELF_DESTFOG);
 			}
 		}
 	}
@@ -164,7 +163,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_KoraxBonePop)
 	// Spawn 6 spirits equalangularly
 	for (i = 0; i < 6; ++i)
 	{
-		mo = P_SpawnMissileAngle (self, PClass::FindActor("KoraxSpirit"), ANGLE_60*i, 5*FRACUNIT);
+		mo = P_SpawnMissileAngle (self, PClass::FindActor("KoraxSpirit"), DAngle(60.*i), 5.);
 		if (mo)
 		{
 			KSpiritInit (mo, self);
@@ -186,7 +185,7 @@ void KSpiritInit (AActor *spirit, AActor *korax)
 	spirit->health = KORAX_SPIRIT_LIFETIME;
 
 	spirit->tracer = korax;						// Swarm around korax
-	spirit->special2 = FINEANGLES/2 + pr_kspiritinit(8 << BOBTOFINESHIFT);	// Float bob index
+	spirit->WeaveIndexZ = 32 + (pr_kspiritinit() & 7);	// Float bob index
 	spirit->args[0] = 10; 						// initial turn value
 	spirit->args[1] = 0; 						// initial look angle
 
@@ -235,23 +234,23 @@ DEFINE_ACTION_FUNCTION(AActor, A_KoraxMissile)
 		{ "SerpentFX", "CentaurLeaderAttack" }
 	};
 
-	int type = pr_koraxmissile()%6;
+	int type = pr_koraxmissile() % 6;
 	int i;
 	PClassActor *info;
 
-	S_Sound (self, CHAN_VOICE, "KoraxAttack", 1, ATTN_NORM);
+	S_Sound(self, CHAN_VOICE, "KoraxAttack", 1, ATTN_NORM);
 
 	info = PClass::FindActor(choices[type].type);
 	if (info == NULL)
 	{
-		I_Error ("Unknown Korax missile: %s\n", choices[type].type);
+		I_Error("Unknown Korax missile: %s\n", choices[type].type);
 	}
 
 	// Fire all 6 missiles at once
-	S_Sound (self, CHAN_WEAPON, choices[type].sound, 1, ATTN_NONE);
+	S_Sound(self, CHAN_WEAPON, choices[type].sound, 1, ATTN_NONE);
 	for (i = 0; i < 6; ++i)
 	{
-		KoraxFire (self, info, i);
+		KoraxFire(self, info, i);
 	}
 	return 0;
 }
@@ -267,17 +266,14 @@ DEFINE_ACTION_FUNCTION(AActor, A_KoraxMissile)
 DEFINE_ACTION_FUNCTION(AActor, A_KoraxCommand)
 {
 	PARAM_ACTION_PROLOGUE;
-	angle_t ang;
+	DAngle ang;
 	int numcommands;
 
 	S_Sound (self, CHAN_VOICE, "KoraxCommand", 1, ATTN_NORM);
 
 	// Shoot stream of lightning to ceiling
-	ang = (self->_f_angle() - ANGLE_90) >> ANGLETOFINESHIFT;
-	fixedvec3 pos = self->Vec3Offset(
-		KORAX_COMMAND_OFFSET * finecosine[ang],
-		KORAX_COMMAND_OFFSET * finesine[ang],
-		KORAX_COMMAND_HEIGHT*FRACUNIT);
+	ang = self->Angles.Yaw - 90;
+	DVector3 pos = self->Vec3Angle(KORAX_COMMAND_OFFSET, ang, KORAX_COMMAND_HEIGHT);
 	Spawn("KoraxBolt", pos, ALLOW_REPLACE);
 
 	if (self->health <= (self->SpawnHealth() >> 1))
@@ -319,7 +315,7 @@ void KoraxFire (AActor *actor, PClassActor *type, int arm)
 		KORAX_ARM_EXTENSION_LONG,
 		KORAX_ARM_EXTENSION_LONG
 	};
-	static const fixed_t armheight[6] =
+	static const int armheight[6] =
 	{
 		KORAX_ARM1_HEIGHT,
 		KORAX_ARM2_HEIGHT,
@@ -329,25 +325,11 @@ void KoraxFire (AActor *actor, PClassActor *type, int arm)
 		KORAX_ARM6_HEIGHT
 	};
 
-	angle_t ang;
-
-	ang = (actor->_f_angle() + (arm < 3 ? -KORAX_DELTAANGLE : KORAX_DELTAANGLE)) >> ANGLETOFINESHIFT;
-	fixedvec3 pos = actor->Vec3Offset(
-		extension[arm] * finecosine[ang],
-		extension[arm] * finesine[ang],
-		-actor->_f_floorclip() + armheight[arm]);
-	P_SpawnKoraxMissile (pos.x, pos.y, pos.z, actor, actor->target, type);
+	DAngle ang = actor->Angles.Yaw + (arm < 3 ? -KORAX_DELTAANGLE : KORAX_DELTAANGLE);
+	DVector3 pos = actor->Vec3Angle(extension[arm], ang, armheight[arm] - actor->Floorclip);
+	P_SpawnKoraxMissile (pos, actor, actor->target, type);
 }
 
-//============================================================================
-//
-// A_KSpiritWeave
-// [BL] Was identical to CHolyWeave so lets just use that
-//
-//============================================================================
-
-void CHolyWeave (AActor *actor, FRandom &pr_random);
-
 //============================================================================
 //
 // A_KSpiritSeeker
@@ -357,11 +339,10 @@ void CHolyWeave (AActor *actor, FRandom &pr_random);
 static void A_KSpiritSeeker (AActor *actor, DAngle thresh, DAngle turnMax)
 {
 	int dir;
-	int dist;
 	DAngle delta;
 	AActor *target;
-	fixed_t newZ;
-	fixed_t deltaZ;
+	double newZ;
+	double deltaZ;
 
 	target = actor->tracer;
 	if (target == NULL)
@@ -388,28 +369,24 @@ static void A_KSpiritSeeker (AActor *actor, DAngle thresh, DAngle turnMax)
 	actor->VelFromAngle();
 
 	if (!(level.time&15) 
-		|| actor->_f_Z() > target->_f_Z()+(target->GetDefault()->_f_height())
-		|| actor->_f_Top() < target->_f_Z())
+		|| actor->Z() > target->Z() + target->GetDefault()->Height
+		|| actor->Top() < target->Z())
 	{
-		newZ = target->_f_Z()+((pr_kspiritseek()*target->GetDefault()->_f_height())>>8);
-		deltaZ = newZ-actor->_f_Z();
-		if (abs(deltaZ) > 15*FRACUNIT)
+		newZ = target->Z() + pr_kspiritseek() * target->GetDefault()->Height / 256;
+		deltaZ = newZ-actor->Z();
+
+		if (fabs(deltaZ) > 15)
 		{
 			if(deltaZ > 0)
 			{
-				deltaZ = 15*FRACUNIT;
+				deltaZ = 15;
 			}
 			else
 			{
-				deltaZ = -15*FRACUNIT;
+				deltaZ = -15;
 			}
 		}
-		dist = actor->AproxDistance (target) / actor->_f_speed();
-		if (dist < 1)
-		{
-			dist = 1;
-		}
-		actor->Vel.Z = FIXED2DBL(deltaZ/dist);
+		actor->Vel.Z = deltaZ + actor->DistanceBySpeed(target, actor->Speed);
 	}
 	return;
 }
@@ -435,7 +412,10 @@ DEFINE_ACTION_FUNCTION(AActor, A_KSpiritRoam)
 		{
 			A_KSpiritSeeker(self, (double)self->args[0], self->args[0] * 2.);
 		}
-		CHolyWeave(self, pr_kspiritweave);
+		int xyspeed = (pr_kspiritweave() % 5);
+		int zspeed = (pr_kspiritweave() % 5);
+		A_Weave(self, xyspeed, zspeed, 4., 2.);
+
 		if (pr_kspiritroam()<50)
 		{
 			S_Sound (self, CHAN_VOICE, "SpiritActive", 1, ATTN_NONE);
@@ -498,15 +478,13 @@ DEFINE_ACTION_FUNCTION(AActor, A_KBoltRaise)
 //
 //============================================================================
 
-AActor *P_SpawnKoraxMissile (fixed_t x, fixed_t y, fixed_t z,
-	AActor *source, AActor *dest, PClassActor *type)
+AActor *P_SpawnKoraxMissile (const DVector3 &pos, AActor *source, AActor *dest, PClassActor *type)
 {
 	AActor *th;
 	DAngle an;
-	int dist;
+	double dist;
 
-	z -= source->_f_floorclip();
-	th = Spawn (type, x, y, z, ALLOW_REPLACE);
+	th = Spawn (type, source->PosPlusZ(-source->Floorclip), ALLOW_REPLACE);
 	th->target = source; // Originator
 	an = th->AngleTo(dest);
 	if (dest->flags & MF_SHADOW)
@@ -515,11 +493,7 @@ AActor *P_SpawnKoraxMissile (fixed_t x, fixed_t y, fixed_t z,
 	}
 	th->Angles.Yaw = an;
 	th->VelFromAngle();
-	dist = dest->AproxDistance (th) / th->_f_speed();
-	if (dist < 1)
-	{
-		dist = 1;
-	}
-	th->Vel.Z = FIXED2DBL((dest->_f_Z()-z+(30*FRACUNIT))/dist);
+	dist = dest->DistanceBySpeed(th, th->Speed);
+	th->Vel.Z = (dest->Z() - pos.Z + 30) / dist;
 	return (P_CheckMissileSpawn(th, source->radius) ? th : NULL);
 }
diff --git a/src/g_hexen/a_magecone.cpp b/src/g_hexen/a_magecone.cpp
index 2346cb26a..f31e57e58 100644
--- a/src/g_hexen/a_magecone.cpp
+++ b/src/g_hexen/a_magecone.cpp
@@ -128,8 +128,8 @@ DEFINE_ACTION_FUNCTION(AActor, A_ShedShard)
 	// every so many calls, spawn a new missile in its set directions
 	if (spawndir & SHARDSPAWN_LEFT)
 	{
-		mo = P_SpawnMissileAngleZSpeed (self, self->_f_Z(), RUNTIME_CLASS(AFrostMissile), self->_f_angle()+(ANG45/9),
-											 0, (20+2*spermcount)<<FRACBITS, self->target);
+		mo = P_SpawnMissileAngleZSpeed(self, self->Z(), RUNTIME_CLASS(AFrostMissile), 
+			self->Angles.Yaw + 5, 0, (20. + 2 * spermcount), self->target);
 		if (mo)
 		{
 			mo->special1 = SHARDSPAWN_LEFT;
@@ -140,8 +140,8 @@ DEFINE_ACTION_FUNCTION(AActor, A_ShedShard)
 	}
 	if (spawndir & SHARDSPAWN_RIGHT)
 	{
-		mo = P_SpawnMissileAngleZSpeed (self, self->_f_Z(), RUNTIME_CLASS(AFrostMissile), self->_f_angle()-(ANG45/9),
-											 0, (20+2*spermcount)<<FRACBITS, self->target);
+		mo = P_SpawnMissileAngleZSpeed(self, self->Z(), RUNTIME_CLASS(AFrostMissile),
+			self->Angles.Yaw - 5, 0, (20. + 2 * spermcount), self->target);
 		if (mo)
 		{
 			mo->special1 = SHARDSPAWN_RIGHT;
@@ -152,8 +152,8 @@ DEFINE_ACTION_FUNCTION(AActor, A_ShedShard)
 	}
 	if (spawndir & SHARDSPAWN_UP)
 	{
-		mo = P_SpawnMissileAngleZSpeed (self, self->_f_Z()+8*FRACUNIT, RUNTIME_CLASS(AFrostMissile), self->_f_angle(), 
-											 0, (15+2*spermcount)<<FRACBITS, self->target);
+		mo = P_SpawnMissileAngleZSpeed(self, self->Z() + 8., RUNTIME_CLASS(AFrostMissile),
+			self->Angles.Yaw, 0, (15. + 2 * spermcount), self->target);
 		if (mo)
 		{
 			mo->Vel.Z = self->Vel.Z;
@@ -167,8 +167,8 @@ DEFINE_ACTION_FUNCTION(AActor, A_ShedShard)
 	}
 	if (spawndir & SHARDSPAWN_DOWN)
 	{
-		mo = P_SpawnMissileAngleZSpeed (self, self->_f_Z()-4*FRACUNIT, RUNTIME_CLASS(AFrostMissile), self->_f_angle(), 
-											 0, (15+2*spermcount)<<FRACBITS, self->target);
+		mo = P_SpawnMissileAngleZSpeed(self, self->Z() - 4., RUNTIME_CLASS(AFrostMissile),
+			self->Angles.Yaw, 0, (15. + 2 * spermcount), self->target);
 		if (mo)
 		{
 			mo->Vel.Z = self->Vel.Z;
diff --git a/src/g_hexen/a_magelightning.cpp b/src/g_hexen/a_magelightning.cpp
index f3f2e439d..b5718f4d7 100644
--- a/src/g_hexen/a_magelightning.cpp
+++ b/src/g_hexen/a_magelightning.cpp
@@ -215,7 +215,6 @@ DEFINE_ACTION_FUNCTION(AActor, A_LightningZap)
 
 	PClassActor *lightning = PClass::FindActor(self->GetClass()->MissileName);
 	AActor *mo;
-	fixed_t deltaZ;
 
 	if (lightning == NULL)
 	{
@@ -230,32 +229,18 @@ DEFINE_ACTION_FUNCTION(AActor, A_LightningZap)
 		self->SetState (self->FindState(NAME_Death));
 		return 0;
 	}
-	if (self->flags3 & MF3_FLOORHUGGER)
-	{
-		deltaZ = 10*FRACUNIT;
-	}
-	else
-	{
-		deltaZ = -10*FRACUNIT;
-	}			
-	fixed_t xo = ((pr_zap() - 128)*self->_f_radius() / 256);
-	fixed_t yo = ((pr_zap() - 128)*self->_f_radius() / 256);
+	double deltaX = (pr_zap() - 128) * self->radius / 256;
+	double deltaY = (pr_zap() - 128) * self->radius / 256;
+	double deltaZ = (self->flags3 & MF3_FLOORHUGGER) ? 10 : -10;
 
-	mo = Spawn(lightning, self->Vec3Offset(xo, yo, deltaZ), ALLOW_REPLACE);
+	mo = Spawn(lightning, self->Vec3Offset(deltaX, deltaY, deltaZ), ALLOW_REPLACE);
 	if (mo)
 	{
 		mo->lastenemy = self;
 		mo->Vel.X = self->Vel.X;
 		mo->Vel.Y = self->Vel.Y;
+		mo->Vel.Z = (self->flags3 & MF3_FLOORHUGGER) ? 20 : -20;
 		mo->target = self->target;
-		if (self->flags3 & MF3_FLOORHUGGER)
-		{
-			mo->Vel.Z = 20;
-		}
-		else 
-		{
-			mo->Vel.Z = -20;
-		}
 	}
 	if ((self->flags3 & MF3_FLOORHUGGER) && pr_zapf() < 160)
 	{
diff --git a/src/g_hexen/a_magestaff.cpp b/src/g_hexen/a_magestaff.cpp
index dff795dcd..92724016c 100644
--- a/src/g_hexen/a_magestaff.cpp
+++ b/src/g_hexen/a_magestaff.cpp
@@ -64,7 +64,7 @@ class AMageStaffFX2 : public AActor
 	DECLARE_CLASS(AMageStaffFX2, AActor)
 public:
 	int SpecialMissileHit (AActor *victim);
-	bool SpecialBlastHandling (AActor *source, fixed_t strength);
+	bool SpecialBlastHandling (AActor *source, double strength);
 };
 
 IMPLEMENT_CLASS (AMageStaffFX2)
@@ -81,7 +81,7 @@ int AMageStaffFX2::SpecialMissileHit (AActor *victim)
 	return -1;
 }
 
-bool AMageStaffFX2::SpecialBlastHandling (AActor *source, fixed_t strength)
+bool AMageStaffFX2::SpecialBlastHandling (AActor *source, double strength)
 {
 	// Reflect to originator
 	tracer = target;	
@@ -102,7 +102,7 @@ void MStaffSpawn (AActor *pmo, DAngle angle, AActor *alttarget)
 	AActor *mo;
 	FTranslatedLineTarget t;
 
-	mo = P_SpawnPlayerMissile (pmo, 0, 0, 8*FRACUNIT, RUNTIME_CLASS(AMageStaffFX2), angle, &t);
+	mo = P_SpawnPlayerMissile (pmo, 0, 0, 8, RUNTIME_CLASS(AMageStaffFX2), angle, &t);
 	if (mo)
 	{
 		mo->target = pmo;
@@ -144,10 +144,10 @@ DEFINE_ACTION_FUNCTION(AActor, A_MStaffAttack)
 	P_AimLineAttack (self, angle, PLAYERMISSILERANGE, &t, 32.);
 	if (t.linetarget == NULL)
 	{
-		BlockCheckLine.x = self->_f_X();
-		BlockCheckLine.y = self->_f_Y();
-		BlockCheckLine.dx = FLOAT2FIXED(-angle.Sin());
-		BlockCheckLine.dy = FLOAT2FIXED(-angle.Cos());
+		BlockCheckLine.x = self->X();
+		BlockCheckLine.y = self->Y();
+		BlockCheckLine.dx = -angle.Sin();
+		BlockCheckLine.dy = -angle.Cos();
 		t.linetarget = P_BlockmapSearch (self, 10, FrontBlockCheck);
 	}
 	MStaffSpawn (self, angle, t.linetarget);
@@ -193,7 +193,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_MStaffTrack)
 	{
 		self->tracer = P_RoughMonsterSearch (self, 10, true);
 	}
-	P_SeekerMissile (self, ANGLE_1*2, ANGLE_1*10);
+	P_SeekerMissile(self, 2, 10);
 	return 0;
 }
 
@@ -213,7 +213,7 @@ static AActor *FrontBlockCheck (AActor *mo, int index, void *)
 	{
 		if (link->Me != mo)
 		{
-			if (P_PointOnDivlineSide (link->Me->_f_X(), link->Me->_f_Y(), &BlockCheckLine) == 0 &&
+			if (P_PointOnDivlineSidePrecise(link->Me->X(), link->Me->Y(), &BlockCheckLine) == 0 &&
 				mo->IsOkayToAttack (link->Me))
 			{
 				return link->Me;
@@ -229,12 +229,11 @@ static AActor *FrontBlockCheck (AActor *mo, int index, void *)
 //
 //============================================================================
 
-void MStaffSpawn2 (AActor *actor, angle_t angle)
+void MStaffSpawn2 (AActor *actor, DAngle angle)
 {
 	AActor *mo;
 
-	mo = P_SpawnMissileAngleZ (actor, actor->_f_Z()+40*FRACUNIT,
-		RUNTIME_CLASS(AMageStaffFX2), angle, 0);
+	mo = P_SpawnMissileAngleZ (actor, actor->Z()+40, RUNTIME_CLASS(AMageStaffFX2), angle, 0.);
 	if (mo)
 	{
 		mo->target = actor;
@@ -256,11 +255,10 @@ DEFINE_ACTION_FUNCTION(AActor, A_MageAttack)
 	{
 		return 0;
 	}
-	angle_t angle;
-	angle = self->_f_angle();
-	MStaffSpawn2 (self, angle);
-	MStaffSpawn2 (self, angle-ANGLE_1*5);
-	MStaffSpawn2 (self, angle+ANGLE_1*5);
-	S_Sound (self, CHAN_WEAPON, "MageStaffFire", 1, ATTN_NORM);
+	DAngle angle = self->Angles.Yaw;
+	MStaffSpawn2(self, angle);
+	MStaffSpawn2(self, angle - 5);
+	MStaffSpawn2(self, angle + 5);
+	S_Sound(self, CHAN_WEAPON, "MageStaffFire", 1, ATTN_NORM);
 	return 0;
 }
diff --git a/src/g_hexen/a_spike.cpp b/src/g_hexen/a_spike.cpp
index dd1978583..4770f5d3a 100644
--- a/src/g_hexen/a_spike.cpp
+++ b/src/g_hexen/a_spike.cpp
@@ -160,8 +160,8 @@ DEFINE_ACTION_FUNCTION(AActor, A_ThrustImpale)
 	FMultiBlockThingsIterator::CheckResult cres;
 	while (it.Next(&cres))
 	{
-		fixed_t blockdist = self->_f_radius() + cres.thing->_f_radius();
-		if (abs(cres.thing->_f_X() - cres.position.x) >= blockdist || abs(cres.thing->_f_Y() - cres.position.y) >= blockdist)
+		double blockdist = self->radius + cres.thing->radius;
+		if (fabs(cres.thing->X() - cres.Position.X) >= blockdist || fabs(cres.thing->Y() - cres.Position.Y) >= blockdist)
 			continue;
 
 		// Q: Make this z-aware for everything? It never was before.
diff --git a/src/g_hexen/a_summon.cpp b/src/g_hexen/a_summon.cpp
index 61df3fb2d..eb5d825bf 100644
--- a/src/g_hexen/a_summon.cpp
+++ b/src/g_hexen/a_summon.cpp
@@ -53,13 +53,13 @@ DEFINE_ACTION_FUNCTION(AActor, A_Summon)
 
 	AMinotaurFriend *mo;
 
-	mo = Spawn<AMinotaurFriend> (self->Pos(), ALLOW_REPLACE);
+	mo = Spawn<AMinotaurFriend>(self->Pos(), ALLOW_REPLACE);
 	if (mo)
 	{
 		if (P_TestMobjLocation(mo) == false || !self->tracer)
 		{ // Didn't fit - change back to artifact
-			mo->Destroy ();
-			AActor *arti = Spawn<AArtiDarkServant> (self->_f_Pos(), ALLOW_REPLACE);
+			mo->Destroy();
+			AActor *arti = Spawn<AArtiDarkServant>(self->Pos(), ALLOW_REPLACE);
 			if (arti) arti->flags |= MF_DROPPED;
 			return 0;
 		}
@@ -72,14 +72,14 @@ DEFINE_ACTION_FUNCTION(AActor, A_Summon)
 		else
 		{
 			mo->tracer = self->tracer;		// Pointer to master
-			AInventory *power = Spawn<APowerMinotaur> (0, 0, 0, NO_REPLACE);
-			power->CallTryPickup (self->tracer);
+			AInventory *power = Spawn<APowerMinotaur>();
+			power->CallTryPickup(self->tracer);
 			mo->SetFriendPlayer(self->tracer->player);
 		}
 
 		// Make smoke puff
-		Spawn ("MinotaurSmoke", self->Pos(), ALLOW_REPLACE);
-		S_Sound (self, CHAN_VOICE, mo->ActiveSound, 1, ATTN_NORM);
+		Spawn("MinotaurSmoke", self->Pos(), ALLOW_REPLACE);
+		S_Sound(self, CHAN_VOICE, mo->ActiveSound, 1, ATTN_NORM);
 	}
 	return 0;
 }
diff --git a/src/g_hexen/a_teleportother.cpp b/src/g_hexen/a_teleportother.cpp
index 8903d47e0..7333d9d91 100644
--- a/src/g_hexen/a_teleportother.cpp
+++ b/src/g_hexen/a_teleportother.cpp
@@ -164,12 +164,12 @@ int ATelOtherFX1::DoSpecialDamage (AActor *target, int damage, FName damagetype)
 
 void P_TeleportToPlayerStarts (AActor *victim)
 {
-	fixed_t destX,destY;
+	DVector3 dest;
 
 	FPlayerStart *start = G_PickPlayerStart(0, PPS_FORCERANDOM | PPS_NOBLOCKINGCHECK);
-	destX = start->x;
-	destY = start->y;
-	P_Teleport (victim, destX, destY, ONFLOORZ, (double)start->angle, TELF_SOURCEFOG | TELF_DESTFOG);
+	dest = start->pos;
+	dest.Z = ONFLOORZ;
+	P_Teleport (victim, dest, (double)start->angle, TELF_SOURCEFOG | TELF_DESTFOG);
 }
 
 //===========================================================================
@@ -181,15 +181,15 @@ void P_TeleportToPlayerStarts (AActor *victim)
 void P_TeleportToDeathmatchStarts (AActor *victim)
 {
 	unsigned int i, selections;
-	fixed_t destX,destY;
+	DVector3 dest;
 
 	selections = deathmatchstarts.Size ();
 	if (selections > 0)
 	{
 		i = pr_teledm() % selections;
-		destX = deathmatchstarts[i].x;
-		destY = deathmatchstarts[i].y;
-		P_Teleport (victim, destX, destY, ONFLOORZ, (double)deathmatchstarts[i].angle, TELF_SOURCEFOG | TELF_DESTFOG);
+		dest = deathmatchstarts[i].pos;
+		dest.Z = ONFLOORZ;
+		P_Teleport (victim, dest, (double)deathmatchstarts[i].angle, TELF_SOURCEFOG | TELF_DESTFOG);
 	}
 	else
 	{
diff --git a/src/g_hexen/a_wraith.cpp b/src/g_hexen/a_wraith.cpp
index de5f4bb72..24ae22afd 100644
--- a/src/g_hexen/a_wraith.cpp
+++ b/src/g_hexen/a_wraith.cpp
@@ -15,12 +15,6 @@ static FRandom pr_wraithfx2 ("WraithFX2");
 static FRandom pr_wraithfx3 ("WraithFX3");
 static FRandom pr_wraithfx4 ("WraithFX4");
 
-//============================================================================
-// Wraith Variables
-//
-//	special1				Internal index into floatbob
-//============================================================================
-
 //============================================================================
 //
 // A_WraithInit
@@ -39,7 +33,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_WraithInit)
 		self->SetZ(self->ceilingz - self->Height);
 	}
 
-	self->special1 = 0;			// index into floatbob
+	self->WeaveIndexZ = 0;			// index into floatbob
 	return 0;
 }
 
@@ -71,7 +65,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_WraithRaise)
 {
 	PARAM_ACTION_PROLOGUE;
 
-	if (A_RaiseMobj (self, 2*FRACUNIT))
+	if (A_RaiseMobj (self, 2))
 	{
 		// Reached it's target height
 		// [RH] Once a buried wraith is fully raised, it should be
@@ -156,15 +150,15 @@ DEFINE_ACTION_FUNCTION(AActor, A_WraithFX3)
 	PARAM_ACTION_PROLOGUE;
 
 	AActor *mo;
-	int numdropped = pr_wraithfx3()%15;
+	int numdropped = pr_wraithfx3() % 15;
 
 	while (numdropped-- > 0)
 	{
-		fixed_t xo = (pr_wraithfx3() - 128) << 11;
-		fixed_t yo = (pr_wraithfx3() - 128) << 11;
-		fixed_t zo = pr_wraithfx3() << 10;
+		double xo = (pr_wraithfx3() - 128) / 32.;
+		double yo = (pr_wraithfx3() - 128) / 32.;
+		double zo = pr_wraithfx3() / 64.;
 
-		mo = Spawn ("WraithFX3", self->Vec3Offset(xo, yo, zo), ALLOW_REPLACE);
+		mo = Spawn("WraithFX3", self->Vec3Offset(xo, yo, zo), ALLOW_REPLACE);
 		if (mo)
 		{
 			mo->floorz = self->floorz;
@@ -212,9 +206,9 @@ void A_WraithFX4 (AActor *self)
 
 	if (spawn4)
 	{
-		fixed_t xo = (pr_wraithfx4() - 128) << 12;
-		fixed_t yo = (pr_wraithfx4() - 128) << 12;
-		fixed_t zo = (pr_wraithfx4() << 10);
+		double xo = (pr_wraithfx4() - 128) / 16.;
+		double yo = (pr_wraithfx4() - 128) / 16.;
+		double zo = (pr_wraithfx4() / 64.);
 
 		mo = Spawn ("WraithFX4", self->Vec3Offset(xo, yo, zo), ALLOW_REPLACE);
 		if (mo)
@@ -226,9 +220,9 @@ void A_WraithFX4 (AActor *self)
 	}
 	if (spawn5)
 	{
-		fixed_t xo = (pr_wraithfx4() - 128) << 11;
-		fixed_t yo = (pr_wraithfx4() - 128) << 11;
-		fixed_t zo = (pr_wraithfx4()<<10);
+		double xo = (pr_wraithfx4() - 128) / 32.;
+		double yo = (pr_wraithfx4() - 128) / 32.;
+		double zo = (pr_wraithfx4() / 64.);
 
 		mo = Spawn ("WraithFX5", self->Vec3Offset(xo, yo, zo), ALLOW_REPLACE);
 		if (mo)
@@ -250,9 +244,9 @@ DEFINE_ACTION_FUNCTION(AActor, A_WraithChase)
 {
 	PARAM_ACTION_PROLOGUE;
 
-	int weaveindex = self->special1;
-	self->_f_AddZ(finesine[weaveindex << BOBTOFINESHIFT] * 8);
-	self->special1 = (weaveindex + 2) & 63;
+	int weaveindex = self->WeaveIndexZ;
+	self->AddZ(BobSin(weaveindex));
+	self->WeaveIndexZ = (weaveindex + 2) & 63;
 //	if (self->Floorclip > 0)
 //	{
 //		P_SetMobjState(self, S_WRAITH_RAISE2);
diff --git a/src/g_level.h b/src/g_level.h
index 8de66974c..2468ff658 100644
--- a/src/g_level.h
+++ b/src/g_level.h
@@ -329,7 +329,7 @@ struct level_info_t
 	FString		SoundInfo;
 	FString		SndSeq;
 
-	float		teamdamage;
+	double		teamdamage;
 
 	FOptData	optdata;
 	FMusicMap	MusicMap;
@@ -444,7 +444,7 @@ struct FLevelLocals
 
 	bool		FromSnapshot;			// The current map was restored from a snapshot
 
-	float		teamdamage;
+	double		teamdamage;
 
 	bool		IsJumpingAllowed() const;
 	bool		IsCrouchingAllowed() const;
@@ -547,7 +547,6 @@ enum ESkillProperty
 {
 	SKILLP_AmmoFactor,
 	SKILLP_DropAmmoFactor,
-	SKILLP_DamageFactor,
 	SKILLP_FastMonsters,
 	SKILLP_Respawn,
 	SKILLP_RespawnLimit,
@@ -566,7 +565,12 @@ enum ESkillProperty
 	SKILLP_SlowMonsters,
 	SKILLP_Infight,
 };
+enum EFSkillProperty	// floating point properties
+{
+	SKILLP_DamageFactor,
+};
 int G_SkillProperty(ESkillProperty prop);
+double G_SkillProperty(EFSkillProperty prop);
 const char * G_SkillName();
 
 typedef TMap<FName, FString> SkillMenuNames;
@@ -577,7 +581,7 @@ struct FSkillInfo
 {
 	FName Name;
 	fixed_t AmmoFactor, DoubleAmmoFactor, DropAmmoFactor;
-	fixed_t DamageFactor;
+	double DamageFactor;
 	bool FastMonsters;
 	bool SlowMonsters;
 	bool DisableCheats;
diff --git a/src/g_mapinfo.cpp b/src/g_mapinfo.cpp
index 4d5bfeb99..b6c3a376a 100644
--- a/src/g_mapinfo.cpp
+++ b/src/g_mapinfo.cpp
@@ -1150,7 +1150,7 @@ DEFINE_MAP_OPTION(teamdamage, true)
 {
 	parse.ParseAssign();
 	parse.sc.MustGetFloat();
-	info->teamdamage = float(parse.sc.Float);
+	info->teamdamage = parse.sc.Float;
 }
 
 DEFINE_MAP_OPTION(mapbackground, true)
diff --git a/src/g_raven/a_artitele.cpp b/src/g_raven/a_artitele.cpp
index 8463609be..9a43f8518 100644
--- a/src/g_raven/a_artitele.cpp
+++ b/src/g_raven/a_artitele.cpp
@@ -27,26 +27,24 @@ IMPLEMENT_CLASS (AArtiTeleport)
 
 bool AArtiTeleport::Use (bool pickup)
 {
-	fixed_t destX;
-	fixed_t destY;
+	DVector3 dest;
 	int destAngle;
 
 	if (deathmatch)
 	{
 		unsigned int selections = deathmatchstarts.Size ();
 		unsigned int i = pr_tele() % selections;
-		destX = deathmatchstarts[i].x;
-		destY = deathmatchstarts[i].y;
+		dest = deathmatchstarts[i].pos;
 		destAngle = deathmatchstarts[i].angle;
 	}
 	else
 	{
 		FPlayerStart *start = G_PickPlayerStart(int(Owner->player - players));
-		destX = start->x;
-		destY = start->y;
+		dest = start->pos;
 		destAngle = start->angle;
 	}
-	P_Teleport (Owner, destX, destY, ONFLOORZ, (double)destAngle, TELF_SOURCEFOG | TELF_DESTFOG);
+	dest.Z = ONFLOORZ;
+	P_Teleport (Owner, dest, (double)destAngle, TELF_SOURCEFOG | TELF_DESTFOG);
 	bool canlaugh = true;
  	if (Owner->player->morphTics && (Owner->player->MorphStyle & MORPH_UNDOBYCHAOSDEVICE))
  	{ // Teleporting away will undo any morph effects (pig)
diff --git a/src/g_raven/a_minotaur.cpp b/src/g_raven/a_minotaur.cpp
index c6c4e233f..34ecfd161 100644
--- a/src/g_raven/a_minotaur.cpp
+++ b/src/g_raven/a_minotaur.cpp
@@ -161,7 +161,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_MinotaurAtk1)
 		if ((player = self->target->player) != NULL &&
 			player->mo == self->target)
 		{ // Squish the player
-			player->deltaviewheight = -16*FRACUNIT;
+			player->deltaviewheight = -16;
 		}
 	}
 	return 0;
@@ -183,7 +183,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_MinotaurDecide)
 
 	bool friendly = !!(self->flags5 & MF5_SUMMONEDMONSTER);
 	AActor *target;
-	int dist;
+	double dist;
 
 	target = self->target;
 	if (!target)
@@ -194,11 +194,11 @@ DEFINE_ACTION_FUNCTION(AActor, A_MinotaurDecide)
 	{
 		S_Sound (self, CHAN_WEAPON, "minotaur/sight", 1, ATTN_NORM);
 	}
-	dist = self->AproxDistance (target);
+	dist = self->Distance2D(target);
 	if (target->Top() > self->Z()
 		&& target->Top() < self->Top()
-		&& dist < (friendly ? 16*64*FRACUNIT : 8*64*FRACUNIT)
-		&& dist > 1*64*FRACUNIT
+		&& dist < (friendly ? 16*64. : 8*64.)
+		&& dist > 1*64.
 		&& pr_minotaurdecide() < 150)
 	{ // Charge attack
 		// Don't call the state function right away
@@ -213,7 +213,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_MinotaurDecide)
 		self->special1 = TICRATE/2; // Charge duration
 	}
 	else if (target->Z() == target->floorz
-		&& dist < 9*64*FRACUNIT
+		&& dist < 9*64.
 		&& pr_minotaurdecide() < (friendly ? 100 : 220))
 	{ // Floor fire attack
 		self->SetState (self->FindState ("Hammer"));
@@ -282,9 +282,9 @@ DEFINE_ACTION_FUNCTION(AActor, A_MinotaurAtk2)
 	PARAM_ACTION_PROLOGUE;
 
 	AActor *mo;
-	angle_t angle;
-	fixed_t vz;
-	fixed_t z;
+	DAngle angle;
+	double vz;
+	double z;
 	bool friendly = !!(self->flags5 & MF5_SUMMONEDMONSTER);
 
 	if (self->target == NULL)
@@ -300,7 +300,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_MinotaurAtk2)
 		P_TraceBleed (newdam > 0 ? newdam : damage, self->target, self);
 		return 0;
 	}
-	z = self->_f_Z() + 40*FRACUNIT;
+	z = self->Z() + 40;
 	PClassActor *fx = PClass::FindActor("MinotaurFX1");
 	if (fx)
 	{
@@ -308,12 +308,12 @@ DEFINE_ACTION_FUNCTION(AActor, A_MinotaurAtk2)
 		if (mo != NULL)
 		{
 //			S_Sound (mo, CHAN_WEAPON, "minotaur/attack2", 1, ATTN_NORM);
-			vz = mo->_f_velz();
-			angle = mo->_f_angle();
-			P_SpawnMissileAngleZ (self, z, fx, angle-(ANG45/8), vz);
-			P_SpawnMissileAngleZ (self, z, fx, angle+(ANG45/8), vz);
-			P_SpawnMissileAngleZ (self, z, fx, angle-(ANG45/16), vz);
-			P_SpawnMissileAngleZ (self, z, fx, angle+(ANG45/16), vz);
+			vz = mo->Vel.Z;
+			angle = mo->Angles.Yaw;
+			P_SpawnMissileAngleZ (self, z, fx, angle-(45./8), vz);
+			P_SpawnMissileAngleZ (self, z, fx, angle+(45./8), vz);
+			P_SpawnMissileAngleZ (self, z, fx, angle-(45./16), vz);
+			P_SpawnMissileAngleZ (self, z, fx, angle+(45./16), vz);
 		}
 	}
 	return 0;
@@ -350,7 +350,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_MinotaurAtk3)
 		if ((player = self->target->player) != NULL &&
 			player->mo == self->target)
 		{ // Squish the player
-			player->deltaviewheight = -16*FRACUNIT;
+			player->deltaviewheight = -16;
 		}
 	}
 	else
@@ -486,7 +486,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_MinotaurRoam)
 //
 // Look for enemy of player
 //----------------------------------------------------------------------------
-#define MINOTAUR_LOOK_DIST		(16*54*FRACUNIT)
+#define MINOTAUR_LOOK_DIST		(16*54.)
 
 DEFINE_ACTION_FUNCTION(AActor, A_MinotaurLook)
 {
@@ -500,7 +500,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_MinotaurLook)
 
 	AActor *mo = NULL;
 	player_t *player;
-	fixed_t dist;
+	double dist;
 	int i;
 	AActor *master = self->tracer;
 
@@ -514,7 +514,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_MinotaurLook)
 			mo = player->mo;
 			if (mo == master) continue;
 			if (mo->health <= 0) continue;
-			dist = self->AproxDistance(mo);
+			dist = self->Distance2D(mo);
 			if (dist > MINOTAUR_LOOK_DIST) continue;
 			self->target = mo;
 			break;
@@ -539,7 +539,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_MinotaurLook)
 			if (!(mo->flags3 & MF3_ISMONSTER)) continue;
 			if (mo->health <= 0) continue;
 			if (!(mo->flags & MF_SHOOTABLE)) continue;
-			dist = self->AproxDistance(mo);
+			dist = self->Distance2D(mo);
 			if (dist > MINOTAUR_LOOK_DIST) continue;
 			if ((mo == master) || (mo == self)) continue;
 			if ((mo->flags5 & MF5_SUMMONEDMONSTER) && (mo->tracer == master)) continue;
diff --git a/src/g_shared/a_action.cpp b/src/g_shared/a_action.cpp
index dbb50445f..56c691c88 100644
--- a/src/g_shared/a_action.cpp
+++ b/src/g_shared/a_action.cpp
@@ -63,7 +63,7 @@ void A_Unblock(AActor *self, bool drop)
 	// [RH] Andy Baker's stealth monsters
 	if (self->flags & MF_STEALTH)
 	{
-		self->alpha = OPAQUE;
+		self->Alpha = 1.;
 		self->visdir = 0;
 	}
 
@@ -201,7 +201,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_FreezeDeath)
 	// [RH] Andy Baker's stealth monsters
 	if (self->flags & MF_STEALTH)
 	{
-		self->alpha = OPAQUE;
+		self->Alpha = 1;
 		self->visdir = 0;
 	}
 
@@ -303,7 +303,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_FreezeDeathChunks)
 			mo->Vel.Z = (mo->Z() - self->Z()) / self->Height * 4;
 			CALL_ACTION(A_IceSetTics, mo); // set a random tic wait
 			mo->RenderStyle = self->RenderStyle;
-			mo->alpha = self->alpha;
+			mo->Alpha = self->Alpha;
 		}
 	}
 	if (self->player)
@@ -326,7 +326,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_FreezeDeathChunks)
 			}
 			head->Angles.Pitch = 0.;
 			head->RenderStyle = self->RenderStyle;
-			head->alpha = self->alpha;
+			head->Alpha = self->Alpha;
 			if (head->player->camera == self)
 			{
 				head->player->camera = head;
diff --git a/src/g_shared/a_armor.cpp b/src/g_shared/a_armor.cpp
index 12e841d7e..016633eff 100644
--- a/src/g_shared/a_armor.cpp
+++ b/src/g_shared/a_armor.cpp
@@ -249,7 +249,7 @@ bool ABasicArmorPickup::Use (bool pickup)
 
 	if (armor == NULL)
 	{
-		armor = Spawn<ABasicArmor> (0,0,0, NO_REPLACE);
+		armor = Spawn<ABasicArmor> ();
 		armor->BecomeItem ();
 		Owner->AddInventory (armor);
 	}
@@ -332,7 +332,7 @@ bool ABasicArmorBonus::Use (bool pickup)
 
 	if (armor == NULL)
 	{
-		armor = Spawn<ABasicArmor> (0,0,0, NO_REPLACE);
+		armor = Spawn<ABasicArmor> ();
 		armor->BecomeItem ();
 		armor->Amount = 0;
 		armor->MaxAmount = MaxSaveAmount;
diff --git a/src/g_shared/a_artifacts.cpp b/src/g_shared/a_artifacts.cpp
index 83ce03099..a09c03c3d 100644
--- a/src/g_shared/a_artifacts.cpp
+++ b/src/g_shared/a_artifacts.cpp
@@ -66,7 +66,7 @@ bool APowerupGiver::Use (bool pickup)
 {
 	if (PowerupType == NULL) return true;	// item is useless
 
-	APowerup *power = static_cast<APowerup *> (Spawn (PowerupType, 0, 0, 0, NO_REPLACE));
+	APowerup *power = static_cast<APowerup *> (Spawn (PowerupType));
 
 	if (EffectTics != 0)
 	{
@@ -415,28 +415,28 @@ void APowerInvulnerable::DoEffect ()
 			// Don't mess with the translucency settings if an
 			// invisibility powerup is active.
 			Owner->RenderStyle = STYLE_Translucent;
-			if (!(level.time & 7) && Owner->alpha > 0 && Owner->alpha < OPAQUE)
+			if (!(level.time & 7) && Owner->Alpha > 0 && Owner->Alpha < 1)
 			{
-				if (Owner->alpha == HX_SHADOW)
+				if (Owner->Alpha == HX_SHADOW)
 				{
-					Owner->alpha = HX_ALTSHADOW;
+					Owner->Alpha = HX_ALTSHADOW;
 				}
 				else
 				{
-					Owner->alpha = 0;
+					Owner->Alpha = 0;
 					Owner->flags2 |= MF2_NONSHOOTABLE;
 				}
 			}
 			if (!(level.time & 31))
 			{
-				if (Owner->alpha == 0)
+				if (Owner->Alpha == 0)
 				{
 					Owner->flags2 &= ~MF2_NONSHOOTABLE;
-					Owner->alpha = HX_ALTSHADOW;
+					Owner->Alpha = HX_ALTSHADOW;
 				}
 				else
 				{
-					Owner->alpha = HX_SHADOW;
+					Owner->Alpha = HX_SHADOW;
 				}
 			}
 		}
@@ -472,7 +472,7 @@ void APowerInvulnerable::EndEffect ()
 			// Don't mess with the translucency settings if an
 			// invisibility powerup is active.
 			Owner->RenderStyle = STYLE_Normal;
-			Owner->alpha = OPAQUE;
+			Owner->Alpha = 1.;
 		}
 	}
 	else if (Mode == NAME_Reflective)
@@ -499,8 +499,8 @@ int APowerInvulnerable::AlterWeaponSprite (visstyle_t *vis)
 	{
 		if (Mode == NAME_Ghost && !(Owner->flags & MF_SHADOW))
 		{
-			fixed_t wp_alpha = MIN<fixed_t>(FRACUNIT/4 + Owner->alpha*3/4, FRACUNIT);
-			if (wp_alpha != FIXED_MAX) vis->alpha = wp_alpha;
+			double wp_alpha = MIN<double>(0.25 + Owner->Alpha*0.75, 1.);
+			vis->alpha = FLOAT2FIXED(wp_alpha);
 		}
 	}
 	return changed;
@@ -616,8 +616,10 @@ void APowerInvisibility::DoEffect ()
 	Super::DoEffect();
 	// Due to potential interference with other PowerInvisibility items
 	// the effect has to be refreshed each tic.
-	fixed_t ts = (Strength/100) * (special1 + 1); if (ts > FRACUNIT) ts = FRACUNIT;
-	Owner->alpha = clamp<fixed_t>((OPAQUE - ts), 0, OPAQUE);
+	double ts = FIXED2DBL((Strength/100) * (special1 + 1)); 
+	
+	if (ts > 1.) ts = 1.;
+	Owner->Alpha = clamp((1. - ts), 0., 1.);
 	switch (Mode)
 	{
 	case (NAME_Fuzzy):
@@ -645,7 +647,7 @@ void APowerInvisibility::DoEffect ()
 		break;
 	default: // Something's wrong
 		Owner->RenderStyle = STYLE_Normal;
-		Owner->alpha = OPAQUE;
+		Owner->Alpha = 1.;
 		break;
 	}
 }
@@ -666,7 +668,7 @@ void APowerInvisibility::EndEffect ()
 		Owner->flags5 &= ~(flags5 & INVISIBILITY_FLAGS5);
 
 		Owner->RenderStyle = STYLE_Normal;
-		Owner->alpha = OPAQUE;
+		Owner->Alpha = 1.;
 
 		// Check whether there are other invisibility items and refresh their effect.
 		// If this isn't done there will be one incorrectly drawn frame when this
@@ -1180,14 +1182,14 @@ IMPLEMENT_CLASS (APlayerSpeedTrail)
 
 void APlayerSpeedTrail::Tick ()
 {
-	const int fade = OPAQUE*6/10/8;
-	if (alpha <= fade)
+	const double fade = .6 / 8;
+	if (Alpha <= fade)
 	{
 		Destroy ();
 	}
 	else
 	{
-		alpha -= fade;
+		Alpha -= fade;
 	}
 }
 
diff --git a/src/g_shared/a_decals.cpp b/src/g_shared/a_decals.cpp
index bcab12b4a..b480deb99 100644
--- a/src/g_shared/a_decals.cpp
+++ b/src/g_shared/a_decals.cpp
@@ -65,7 +65,7 @@ IMPLEMENT_CLASS (DImpactDecal)
 
 DBaseDecal::DBaseDecal ()
 : DThinker(STAT_DECAL),
-  WallNext(0), WallPrev(0), LeftDistance(0), Z(0), ScaleX(FRACUNIT), ScaleY(FRACUNIT), Alpha(FRACUNIT),
+  WallNext(0), WallPrev(0), LeftDistance(0), Z(0), ScaleX(FRACUNIT), ScaleY(FRACUNIT), Alpha(OPAQUE),
   AlphaColor(0), Translation(0), RenderFlags(0)
 {
 	RenderStyle = STYLE_None;
@@ -74,7 +74,7 @@ DBaseDecal::DBaseDecal ()
 
 DBaseDecal::DBaseDecal (fixed_t z)
 : DThinker(STAT_DECAL),
-  WallNext(0), WallPrev(0), LeftDistance(0), Z(z), ScaleX(FRACUNIT), ScaleY(FRACUNIT), Alpha(FRACUNIT),
+  WallNext(0), WallPrev(0), LeftDistance(0), Z(z), ScaleX(FRACUNIT), ScaleY(FRACUNIT), Alpha(OPAQUE),
   AlphaColor(0), Translation(0), RenderFlags(0)
 {
 	RenderStyle = STYLE_None;
@@ -83,7 +83,7 @@ DBaseDecal::DBaseDecal (fixed_t z)
 
 DBaseDecal::DBaseDecal (int statnum, fixed_t z)
 : DThinker(statnum),
-  WallNext(0), WallPrev(0), LeftDistance(0), Z(z), ScaleX(FRACUNIT), ScaleY(FRACUNIT), Alpha(FRACUNIT),
+  WallNext(0), WallPrev(0), LeftDistance(0), Z(z), ScaleX(FRACUNIT), ScaleY(FRACUNIT), Alpha(OPAQUE),
   AlphaColor(0), Translation(0), RenderFlags(0)
 {
 	RenderStyle = STYLE_None;
@@ -93,7 +93,7 @@ DBaseDecal::DBaseDecal (int statnum, fixed_t z)
 DBaseDecal::DBaseDecal (const AActor *basis)
 : DThinker(STAT_DECAL),
   WallNext(0), WallPrev(0), LeftDistance(0), Z(basis->_f_Z()), ScaleX(FLOAT2FIXED(basis->Scale.X)), ScaleY(FLOAT2FIXED(basis->Scale.Y)),
-  Alpha(basis->alpha), AlphaColor(basis->fillcolor), Translation(basis->Translation), PicNum(basis->picnum),
+  Alpha(FLOAT2FIXED(basis->Alpha)), AlphaColor(basis->fillcolor), Translation(basis->Translation), PicNum(basis->picnum),
   RenderFlags(basis->renderflags), RenderStyle(basis->RenderStyle)
 {
 }
diff --git a/src/g_shared/a_morph.cpp b/src/g_shared/a_morph.cpp
index 33d25e638..174bfd4a2 100644
--- a/src/g_shared/a_morph.cpp
+++ b/src/g_shared/a_morph.cpp
@@ -168,7 +168,6 @@ bool P_UndoPlayerMorph (player_t *activator, player_t *player, int unmorphflag,
 	AWeapon *beastweap;
 	APlayerPawn *mo;
 	APlayerPawn *pmo;
-	angle_t angle;
 
 	pmo = player->mo;
 	// [MH]
@@ -305,11 +304,10 @@ bool P_UndoPlayerMorph (player_t *activator, player_t *player, int unmorphflag,
 		}
 	}
 
-	angle = mo->_f_angle() >> ANGLETOFINESHIFT;
 	AActor *eflash = NULL;
 	if (exit_flash != NULL)
 	{
-		eflash = Spawn(exit_flash, pmo->Vec3Offset(20*finecosine[angle], 20*finesine[angle], TELEFOGHEIGHT), ALLOW_REPLACE);
+		eflash = Spawn(exit_flash, pmo->Vec3Angle(20., mo->Angles.Yaw, TELEFOGHEIGHT), ALLOW_REPLACE);
 		if (eflash)	eflash->target = mo;
 	}
 	mo->SetupWeaponSlots();		// Use original class's weapon slots.
@@ -385,7 +383,7 @@ bool P_MorphMonster (AActor *actor, PClassActor *spawntype, int duration, int st
 	morphed->tid = actor->tid;
 	morphed->Angles.Yaw = actor->Angles.Yaw;
 	morphed->UnmorphedMe = actor;
-	morphed->alpha = actor->alpha;
+	morphed->Alpha = actor->Alpha;
 	morphed->RenderStyle = actor->RenderStyle;
 	morphed->Score = actor->Score;
 
diff --git a/src/g_shared/a_pickups.cpp b/src/g_shared/a_pickups.cpp
index 2aea9fa14..2e1db7c5d 100644
--- a/src/g_shared/a_pickups.cpp
+++ b/src/g_shared/a_pickups.cpp
@@ -204,7 +204,7 @@ AInventory *AAmmo::CreateCopy (AActor *other)
 			Destroy ();
 		}
 
-		copy = static_cast<AInventory *>(Spawn (type, 0, 0, 0, NO_REPLACE));
+		copy = static_cast<AInventory *>(Spawn (type));
 		copy->Amount = amount;
 		copy->BecomeItem ();
 	}
@@ -747,7 +747,7 @@ AInventory *AInventory::CreateCopy (AActor *other)
 	Amount = MIN(Amount, MaxAmount);
 	if (GoAway ())
 	{
-		copy = static_cast<AInventory *>(Spawn (GetClass(), 0, 0, 0, NO_REPLACE));
+		copy = static_cast<AInventory *>(Spawn (GetClass()));
 		copy->Amount = Amount;
 		copy->MaxAmount = MaxAmount;
 	}
@@ -1861,7 +1861,7 @@ AInventory *ABackpackItem::CreateCopy (AActor *other)
 			if (amount < 0) amount = 0;
 			if (ammo == NULL)
 			{ // The player did not have the ammo. Add it.
-				ammo = static_cast<AAmmo *>(Spawn(atype, 0, 0, 0, NO_REPLACE));
+				ammo = static_cast<AAmmo *>(Spawn(atype));
 				ammo->Amount = bDepleted ? 0 : amount;
 				if (ammo->BackpackMaxAmount > ammo->MaxAmount)
 				{
diff --git a/src/g_shared/a_weaponpiece.cpp b/src/g_shared/a_weaponpiece.cpp
index 9612b1716..2d7549db7 100644
--- a/src/g_shared/a_weaponpiece.cpp
+++ b/src/g_shared/a_weaponpiece.cpp
@@ -89,7 +89,7 @@ bool AWeaponPiece::TryPickup (AActor *&toucher)
 	}
 	if (!hold)
 	{
-		hold=static_cast<AWeaponHolder*>(Spawn(RUNTIME_CLASS(AWeaponHolder), 0, 0, 0, NO_REPLACE));
+		hold=static_cast<AWeaponHolder*>(Spawn(RUNTIME_CLASS(AWeaponHolder)));
 		hold->BecomeItem();
 		hold->AttachToOwner(toucher);
 		hold->PieceMask=0;
@@ -129,7 +129,7 @@ bool AWeaponPiece::TryPickup (AActor *&toucher)
 	{
 		if (!toucher->FindInventory (WeaponClass))
 		{
-			FullWeapon= static_cast<AWeapon*>(Spawn(WeaponClass, 0, 0, 0, NO_REPLACE));
+			FullWeapon= static_cast<AWeapon*>(Spawn(WeaponClass));
 			
 			// The weapon itself should not give more ammo to the player!
 			FullWeapon->AmmoGive1=0;
diff --git a/src/g_shared/a_weapons.cpp b/src/g_shared/a_weapons.cpp
index 93036b031..5e00d9025 100644
--- a/src/g_shared/a_weapons.cpp
+++ b/src/g_shared/a_weapons.cpp
@@ -387,7 +387,7 @@ AAmmo *AWeapon::AddAmmo (AActor *other, PClassActor *ammotype, int amount)
 	ammo = static_cast<AAmmo *>(other->FindInventory (ammotype));
 	if (ammo == NULL)
 	{
-		ammo = static_cast<AAmmo *>(Spawn (ammotype, 0, 0, 0, NO_REPLACE));
+		ammo = static_cast<AAmmo *>(Spawn (ammotype));
 		ammo->Amount = MIN (amount, ammo->MaxAmount);
 		ammo->AttachToOwner (other);
 	}
@@ -449,7 +449,7 @@ AWeapon *AWeapon::AddWeapon (PClassWeapon *weapontype)
 	weap = static_cast<AWeapon *>(Owner->FindInventory (weapontype));
 	if (weap == NULL)
 	{
-		weap = static_cast<AWeapon *>(Spawn (weapontype, 0, 0, 0, NO_REPLACE));
+		weap = static_cast<AWeapon *>(Spawn (weapontype));
 		weap->AttachToOwner (Owner);
 	}
 	return weap;
@@ -749,7 +749,7 @@ bool AWeaponGiver::TryPickup(AActor *&toucher)
 		{
 			if (master == NULL)
 			{
-				master = weap = static_cast<AWeapon*>(Spawn(di->Name, 0, 0, 0, NO_REPLACE));
+				master = weap = static_cast<AWeapon*>(Spawn(di->Name));
 				if (weap != NULL)
 				{
 					weap->ItemFlags &= ~IF_ALWAYSPICKUP;	// use the flag of this item only.
diff --git a/src/g_shared/sbarinfo.cpp b/src/g_shared/sbarinfo.cpp
index 23733efcf..3cc4ccc42 100644
--- a/src/g_shared/sbarinfo.cpp
+++ b/src/g_shared/sbarinfo.cpp
@@ -294,7 +294,7 @@ class SBarInfoMainBlock : public SBarInfoCommandFlowControl
 {
 	public:
 		SBarInfoMainBlock(SBarInfo *script) : SBarInfoCommandFlowControl(script),
-			alpha(FRACUNIT), currentAlpha(FRACUNIT), forceScaled(false),
+			alpha(OPAQUE), currentAlpha(OPAQUE), forceScaled(false),
 			fullScreenOffsets(false)
 		{
 			SetTruth(true, NULL, NULL);
@@ -309,7 +309,7 @@ class SBarInfoMainBlock : public SBarInfoCommandFlowControl
 		{
 			this->xOffset = xOffset;
 			this->yOffset = yOffset;
-			this->currentAlpha = fixed_t((((double) this->alpha / (double) FRACUNIT) * ((double) alpha / (double) FRACUNIT)) * FRACUNIT);
+			this->currentAlpha = FixedMul(this->alpha, alpha);
 			SBarInfoCommandFlowControl::Draw(this, statusBar);
 		}
 		bool	ForceScaled() const { return forceScaled; }
@@ -334,7 +334,7 @@ class SBarInfoMainBlock : public SBarInfoCommandFlowControl
 					}
 				}
 				sc.MustGetToken(TK_FloatConst);
-				alpha = fixed_t(FRACUNIT * sc.Float);
+				alpha = fixed_t(OPAQUE * sc.Float);
 			}
 			SBarInfoCommandFlowControl::Parse(sc, this->fullScreenOffsets);
 		}
@@ -870,11 +870,11 @@ void Popup::tick()
 			if(moving)
 			{
 				if(opened)
-					alpha = clamp(alpha + speed, 0, FRACUNIT);
+					alpha = clamp<int>(alpha + speed, 0, OPAQUE);
 				else
-					alpha = clamp(alpha - speed2, 0, FRACUNIT);
+					alpha = clamp<int>(alpha - speed2, 0, OPAQUE);
 			}
-			if(alpha == 0 || alpha == FRACUNIT)
+			if(alpha == 0 || alpha == OPAQUE)
 				moving = false;
 			else
 				moving = true;
@@ -912,9 +912,7 @@ int Popup::getYOffset()
 
 int Popup::getAlpha(int maxAlpha)
 {
-	double a = (double) alpha / (double) FRACUNIT;
-	double b = (double) maxAlpha / (double) FRACUNIT;
-	return fixed_t((a * b) * FRACUNIT);
+	return FixedMul(alpha, maxAlpha);
 }
 
 int Popup::getXDisplacement()
@@ -1458,7 +1456,7 @@ public:
 			}
 			if(drawshadow)
 			{
-				int salpha = fixed_t(((double) alpha / (double) FRACUNIT) * ((double) HR_SHADOW / (double) FRACUNIT) * FRACUNIT);
+				fixed_t salpha = fixed_t(alpha *HR_SHADOW);
 				double srx = rx + (shadowX*xScale);
 				double sry = ry + (shadowY*yScale);
 				screen->DrawTexture(character, srx, sry,
diff --git a/src/g_shared/sbarinfo.h b/src/g_shared/sbarinfo.h
index 4e6591e65..780cb433b 100644
--- a/src/g_shared/sbarinfo.h
+++ b/src/g_shared/sbarinfo.h
@@ -77,7 +77,7 @@ struct Popup
 	bool isDoneMoving();
 	int getXOffset();
 	int getYOffset();
-	int getAlpha(int maxAlpha=FRACUNIT);
+	int getAlpha(int maxAlpha=OPAQUE);
 	int getXDisplacement();
 	int getYDisplacement();
 };
diff --git a/src/g_shared/sbarinfo_commands.cpp b/src/g_shared/sbarinfo_commands.cpp
index 78b7bc859..1e41a624c 100644
--- a/src/g_shared/sbarinfo_commands.cpp
+++ b/src/g_shared/sbarinfo_commands.cpp
@@ -48,7 +48,7 @@ class CommandDrawImage : public SBarInfoCommandFlowControl
 			translatable(false), type(NORMAL_IMAGE), image(-1), maxwidth(-1),
 			maxheight(-1), spawnScaleX(1.0f), spawnScaleY(1.0f), flags(0),
 			applyscale(false), offset(static_cast<Offset> (TOP|LEFT)),
-			texture(NULL), alpha(FRACUNIT)
+			texture(NULL), alpha(OPAQUE)
 		{
 		}
 
@@ -63,9 +63,7 @@ class CommandDrawImage : public SBarInfoCommandFlowControl
 			int w = maxwidth, h = maxheight;
 			
 			// We must calculate this per frame in order to prevent glitches with cl_capfps true.
-			fixed_t frameAlpha = block->Alpha();
-			if(alpha != FRACUNIT)
-				frameAlpha = fixed_t(((double) block->Alpha() / (double) FRACUNIT) * ((double) alpha / (double) OPAQUE) * FRACUNIT);
+			fixed_t frameAlpha = FixedMul(block->Alpha(), alpha);
 			
 			if(flags & DI_DRAWINBOX)
 			{
@@ -236,7 +234,7 @@ class CommandDrawImage : public SBarInfoCommandFlowControl
 			SBarInfoCommandFlowControl::Tick(block, statusBar, hudChanged);
 
 			texture = NULL;
-			alpha = FRACUNIT;
+			alpha = OPAQUE;
 			if (applyscale)
 			{
 				spawnScaleX = spawnScaleY = 1.0f;
@@ -284,7 +282,7 @@ class CommandDrawImage : public SBarInfoCommandFlowControl
 					if (harmor->Slots[armorType] > 0 && harmor->SlotsIncrement[armorType] > 0)
 					{
 						//combine the alpha values
-						alpha = fixed_t(((double) alpha / (double) FRACUNIT) * ((double) MIN<fixed_t> (OPAQUE, Scale(harmor->Slots[armorType], OPAQUE, harmor->SlotsIncrement[armorType])) / (double) OPAQUE) * FRACUNIT);
+						alpha = FixedMul(alpha, MIN<fixed_t> (OPAQUE, Scale(harmor->Slots[armorType], OPAQUE, harmor->SlotsIncrement[armorType])));
 						texture = statusBar->Images[image];
 					}
 					else
@@ -1645,7 +1643,7 @@ class CommandDrawSelectedInventory : public CommandDrawImage, private CommandDra
 				{
 					if(itemflash && itemflashFade)
 					{
-						fixed_t flashAlpha = fixed_t(((double) block->Alpha() / (double) FRACUNIT) * ((double) itemflashFade / (double) OPAQUE) * FRACUNIT);
+						fixed_t flashAlpha = FixedMul(block->Alpha(), itemflashFade);
 						statusBar->DrawGraphic(statusBar->Images[statusBar->invBarOffset + imgCURSOR], imgx-4, imgy+2, block->XOffset(), block->YOffset(), flashAlpha, block->FullScreenOffsets(),
 							translatable, false, offset);
 					}
@@ -2114,7 +2112,7 @@ class CommandDrawInventoryBar : public SBarInfoCommand
 		
 			int bgalpha = block->Alpha();
 			if(translucent)
-				bgalpha = fixed_t((((double) block->Alpha() / (double) FRACUNIT) * ((double) HX_SHADOW / (double) FRACUNIT)) * FRACUNIT);
+				bgalpha = fixed_t(block->Alpha() * HX_SHADOW);
 		
 			AInventory *item;
 			unsigned int i = 0;
diff --git a/src/g_shared/shared_hud.cpp b/src/g_shared/shared_hud.cpp
index e6f3420b0..f3eb29cb6 100644
--- a/src/g_shared/shared_hud.cpp
+++ b/src/g_shared/shared_hud.cpp
@@ -767,7 +767,7 @@ static void DrawInventory(player_t * CPlayer, int x,int y)
 
 				if (AltIcon.Exists() && (rover->Icon.isValid() || AltIcon.isValid()) )
 				{
-					int trans = rover==CPlayer->mo->InvSel ? FRACUNIT : 0x6666;
+					int trans = rover==CPlayer->mo->InvSel ? OPAQUE : 0x6666;
 
 					DrawImageToBox(TexMan[AltIcon.isValid()? AltIcon : rover->Icon], x, y, 19, 25, trans);
 					if (rover->Amount>1)
@@ -934,7 +934,7 @@ static void DrawTime()
 	const int width  = SmallFont->GetCharWidth('0') * characterCount + 2; // small offset from screen's border
 	const int height = SmallFont->GetHeight();
 
-	DrawHudText(SmallFont, hud_timecolor, timeString, hudwidth - width, height, FRACUNIT);
+	DrawHudText(SmallFont, hud_timecolor, timeString, hudwidth - width, height, OPAQUE);
 }
 
 static bool IsAltHUDTextVisible()
@@ -992,7 +992,7 @@ static void DrawLatency()
 	const int width = SmallFont->GetCharWidth('0') * characterCount + 2; // small offset from screen's border
 	const int height = SmallFont->GetHeight() * (ST_IsTimeVisible() ? 2 : 1);
 
-	DrawHudText(SmallFont, color, tempstr, hudwidth - width, height, FRACUNIT);
+	DrawHudText(SmallFont, color, tempstr, hudwidth - width, height, OPAQUE);
 }
 
 bool ST_IsLatencyVisible()
@@ -1083,7 +1083,7 @@ void DrawHUD()
 		{
 			seconds = Tics2Seconds(level.totaltime);
 			mysnprintf(printstr, countof(printstr), "%02i:%02i:%02i", seconds/3600, (seconds%3600)/60, seconds%60);
-			DrawHudText(SmallFont, hudcolor_ttim, printstr, hudwidth-length, bottom, FRACUNIT);
+			DrawHudText(SmallFont, hudcolor_ttim, printstr, hudwidth-length, bottom, OPAQUE);
 			bottom -= fonth;
 		}
 
@@ -1093,14 +1093,14 @@ void DrawHUD()
 			{
 				seconds = Tics2Seconds(level.time);
 				mysnprintf(printstr, countof(printstr), "%02i:%02i:%02i", seconds/3600, (seconds%3600)/60, seconds%60);
-				DrawHudText(SmallFont, hudcolor_time, printstr, hudwidth-length, bottom, FRACUNIT);
+				DrawHudText(SmallFont, hudcolor_time, printstr, hudwidth-length, bottom, OPAQUE);
 				bottom -= fonth;
 			}
 
 			// Single level time for hubs
 			seconds= Tics2Seconds(level.maptime);
 			mysnprintf(printstr, countof(printstr), "%02i:%02i:%02i", seconds/3600, (seconds%3600)/60, seconds%60);
-			DrawHudText(SmallFont, hudcolor_ltim, printstr, hudwidth-length, bottom, FRACUNIT);
+			DrawHudText(SmallFont, hudcolor_ltim, printstr, hudwidth-length, bottom, OPAQUE);
 		}
 
 		ST_FormatMapName(mapname);
diff --git a/src/g_shared/shared_sbar.cpp b/src/g_shared/shared_sbar.cpp
index 781ca915e..736ba4af7 100644
--- a/src/g_shared/shared_sbar.cpp
+++ b/src/g_shared/shared_sbar.cpp
@@ -762,7 +762,7 @@ void DBaseStatusBar::DrINumberOuter (signed int val, int x, int y, bool center,
 	else if (val == 0)
 	{
 		screen->DrawTexture (Images[imgINumbers], x + 1, y + 1,
-			DTA_FillColor, 0, DTA_Alpha, HR_SHADOW,
+			DTA_FillColor, 0, DTA_AlphaF, HR_SHADOW,
 			DTA_HUDRules, center ? HUD_HorizCenter : HUD_Normal, TAG_DONE);
 		screen->DrawTexture (Images[imgINumbers], x, y,
 			DTA_HUDRules, center ? HUD_HorizCenter : HUD_Normal, TAG_DONE);
@@ -776,7 +776,7 @@ void DBaseStatusBar::DrINumberOuter (signed int val, int x, int y, bool center,
 	while (val != 0)
 	{
 		screen->DrawTexture (Images[imgINumbers + val % 10], x + 1, y + 1,
-			DTA_FillColor, 0, DTA_Alpha, HR_SHADOW,
+			DTA_FillColor, 0, DTA_AlphaF, HR_SHADOW,
 			DTA_HUDRules, center ? HUD_HorizCenter : HUD_Normal, TAG_DONE);
 		x -= w;
 		val /= 10;
@@ -784,7 +784,7 @@ void DBaseStatusBar::DrINumberOuter (signed int val, int x, int y, bool center,
 	if (negative)
 	{
 		screen->DrawTexture (Images[imgNEGATIVE], x + 1, y + 1,
-			DTA_FillColor, 0, DTA_Alpha, HR_SHADOW,
+			DTA_FillColor, 0, DTA_AlphaF, HR_SHADOW,
 			DTA_HUDRules, center ? HUD_HorizCenter : HUD_Normal, TAG_DONE);
 	}
 
@@ -839,7 +839,7 @@ void DBaseStatusBar::DrBNumberOuter (signed int val, int x, int y, int size) con
 		{
 			screen->DrawTexture (pic, xpos - pic->GetWidth()/2 + 2, y + 2,
 				DTA_HUDRules, HUD_Normal,
-				DTA_Alpha, HR_SHADOW,
+				DTA_AlphaF, HR_SHADOW,
 				DTA_FillColor, 0,
 				TAG_DONE);
 			screen->DrawTexture (pic, xpos - pic->GetWidth()/2, y,
@@ -865,7 +865,7 @@ void DBaseStatusBar::DrBNumberOuter (signed int val, int x, int y, int size) con
 		{
 			screen->DrawTexture (pic, xpos - pic->GetWidth()/2 + 2, y + 2,
 				DTA_HUDRules, HUD_Normal,
-				DTA_Alpha, HR_SHADOW,
+				DTA_AlphaF, HR_SHADOW,
 				DTA_FillColor, 0,
 				TAG_DONE);
 		}
@@ -879,7 +879,7 @@ void DBaseStatusBar::DrBNumberOuter (signed int val, int x, int y, int size) con
 		{
 			screen->DrawTexture (pic, xpos - pic->GetWidth()/2 + 2, y + 2,
 				DTA_HUDRules, HUD_Normal,
-				DTA_Alpha, HR_SHADOW,
+				DTA_AlphaF, HR_SHADOW,
 				DTA_FillColor, 0,
 				TAG_DONE);
 		}
@@ -941,7 +941,7 @@ void DBaseStatusBar::DrBNumberOuterFont (signed int val, int x, int y, int size)
 		pic = BigFont->GetChar ('0', &v);
 		screen->DrawTexture (pic, xpos - v/2 + 2, y + 2,
 			DTA_HUDRules, HUD_Normal,
-			DTA_Alpha, HR_SHADOW,
+			DTA_AlphaF, HR_SHADOW,
 			DTA_FillColor, 0,
 			DTA_Translation, BigFont->GetColorTranslation (CR_UNTRANSLATED),
 			TAG_DONE);
@@ -966,7 +966,7 @@ void DBaseStatusBar::DrBNumberOuterFont (signed int val, int x, int y, int size)
 		pic = BigFont->GetChar ('0' + val % 10, &v);
 		screen->DrawTexture (pic, xpos - v/2 + 2, y + 2,
 			DTA_HUDRules, HUD_Normal,
-			DTA_Alpha, HR_SHADOW,
+			DTA_AlphaF, HR_SHADOW,
 			DTA_FillColor, 0,
 			DTA_Translation, BigFont->GetColorTranslation (CR_UNTRANSLATED),
 			TAG_DONE);
@@ -980,7 +980,7 @@ void DBaseStatusBar::DrBNumberOuterFont (signed int val, int x, int y, int size)
 		{
 			screen->DrawTexture (pic, xpos - v/2 + 2, y + 2,
 				DTA_HUDRules, HUD_Normal,
-				DTA_Alpha, HR_SHADOW,
+				DTA_AlphaF, HR_SHADOW,
 				DTA_FillColor, 0,
 				DTA_Translation, BigFont->GetColorTranslation (CR_UNTRANSLATED),
 				TAG_DONE);
diff --git a/src/g_skill.cpp b/src/g_skill.cpp
index a4956477c..10d6a3ac7 100644
--- a/src/g_skill.cpp
+++ b/src/g_skill.cpp
@@ -62,7 +62,7 @@ void FMapInfoParser::ParseSkill ()
 	skill.AmmoFactor = FRACUNIT;
 	skill.DoubleAmmoFactor = 2*FRACUNIT;
 	skill.DropAmmoFactor = -1;
-	skill.DamageFactor = FRACUNIT;
+	skill.DamageFactor = 1.;
 	skill.FastMonsters = false;
 	skill.SlowMonsters = false;
 	skill.DisableCheats = false;
@@ -115,7 +115,7 @@ void FMapInfoParser::ParseSkill ()
 		{
 			ParseAssign();
 			sc.MustGetFloat ();
-			skill.DamageFactor = FLOAT2FIXED(sc.Float);
+			skill.DamageFactor = sc.Float;
 		}
 		else if (sc.Compare ("fastmonsters"))
 		{
@@ -351,9 +351,6 @@ int G_SkillProperty(ESkillProperty prop)
 		case SKILLP_DropAmmoFactor:
 			return AllSkills[gameskill].DropAmmoFactor;
 
-		case SKILLP_DamageFactor:
-			return AllSkills[gameskill].DamageFactor;
-
 		case SKILLP_FastMonsters:
 			return AllSkills[gameskill].FastMonsters  || (dmflags & DF_FAST_MONSTERS);
 
@@ -416,6 +413,28 @@ int G_SkillProperty(ESkillProperty prop)
 	return 0;
 }
 
+//==========================================================================
+//
+//
+//
+//==========================================================================
+
+double G_SkillProperty(EFSkillProperty prop)
+{
+	if (AllSkills.Size() > 0)
+	{
+		switch (prop)
+		{
+		case SKILLP_DamageFactor:
+			return AllSkills[gameskill].DamageFactor;
+			break;
+		}
+	}
+	return 0;
+}
+
+
+
 //==========================================================================
 //
 //
diff --git a/src/g_strife/a_acolyte.cpp b/src/g_strife/a_acolyte.cpp
index f0824a98b..e8049da1b 100644
--- a/src/g_strife/a_acolyte.cpp
+++ b/src/g_strife/a_acolyte.cpp
@@ -29,7 +29,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_HideDecepticon)
 {
 	PARAM_ACTION_PROLOGUE;
 
-	EV_DoDoor (DDoor::doorClose, NULL, self, 999, 8*FRACUNIT, 0, 0, 0);
+	EV_DoDoor (DDoor::doorClose, NULL, self, 999, 8., 0, 0, 0);
 	if (self->target != NULL && self->target->player != NULL)
 	{
 		P_NoiseAlert (self->target, self);
@@ -95,7 +95,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_BeShadowyFoe)
 	PARAM_ACTION_PROLOGUE;
 
 	self->RenderStyle = STYLE_Translucent;
-	self->alpha = HR_SHADOW;
+	self->Alpha = HR_SHADOW;
 	self->flags &= ~MF_FRIENDLY;
 	return 0;
 }
diff --git a/src/g_strife/a_alienspectres.cpp b/src/g_strife/a_alienspectres.cpp
index de95de431..a7624785b 100644
--- a/src/g_strife/a_alienspectres.cpp
+++ b/src/g_strife/a_alienspectres.cpp
@@ -22,7 +22,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_SpectreChunkSmall)
 {
 	PARAM_ACTION_PROLOGUE;
 
-	AActor *foo = Spawn("AlienChunkSmall", self->PosPlusZ(10*FRACUNIT), ALLOW_REPLACE);
+	AActor *foo = Spawn("AlienChunkSmall", self->PosPlusZ(10.), ALLOW_REPLACE);
 
 	if (foo != NULL)
 	{
@@ -43,7 +43,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_SpectreChunkLarge)
 {
 	PARAM_ACTION_PROLOGUE;
 
-	AActor *foo = Spawn("AlienChunkLarge", self->PosPlusZ(10*FRACUNIT), ALLOW_REPLACE);
+	AActor *foo = Spawn("AlienChunkLarge", self->PosPlusZ(10.), ALLOW_REPLACE);
 
 	if (foo != NULL)
 	{
@@ -67,7 +67,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_Spectre3Attack)
 	if (self->target == NULL)
 		return 0;
 
-	AActor *foo = Spawn("SpectralLightningV2", self->PosPlusZ(32*FRACUNIT), ALLOW_REPLACE);
+	AActor *foo = Spawn("SpectralLightningV2", self->PosPlusZ(32.), ALLOW_REPLACE);
 
 	foo->Vel.Z = -12;
 	foo->target = self;
@@ -114,7 +114,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_AlienSpectreDeath)
 	switch (self->GetClass()->TypeName)
 	{
 	case NAME_AlienSpectre1:
-		EV_DoFloor (DFloor::floorLowerToLowest, NULL, 999, FRACUNIT, 0, -1, 0, false);
+		EV_DoFloor (DFloor::floorLowerToLowest, NULL, 999, 1., 0., -1, 0, false);
 		log = 95;
 		break;
 
@@ -152,7 +152,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_AlienSpectreDeath)
 		{	// You wield the power of the complete Sigil.
 			log = 85;
 		}
-		EV_DoDoor (DDoor::doorOpen, NULL, NULL, 222, 8*FRACUNIT, 0, 0, 0);
+		EV_DoDoor (DDoor::doorOpen, NULL, NULL, 222, 8., 0, 0, 0);
 		break;
 	}
 
@@ -188,7 +188,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_AlienSpectreDeath)
 		{	// Another Sigil piece. Woohoo!
 			log = 83;
 		}
-		EV_DoFloor (DFloor::floorLowerToLowest, NULL, 666, FRACUNIT, 0, -1, 0, false);
+		EV_DoFloor (DFloor::floorLowerToLowest, NULL, 666, 1., 0., -1, 0, false);
 		break;
 
 	default:
diff --git a/src/g_strife/a_coin.cpp b/src/g_strife/a_coin.cpp
index 0796abc54..5848164bd 100644
--- a/src/g_strife/a_coin.cpp
+++ b/src/g_strife/a_coin.cpp
@@ -54,7 +54,7 @@ AInventory *ACoin::CreateCopy (AActor *other)
 	{
 		return Super::CreateCopy (other);
 	}
-	AInventory *copy = Spawn<ACoin> (0,0,0, NO_REPLACE);
+	AInventory *copy = Spawn<ACoin> ();
 	copy->Amount = Amount;
 	copy->BecomeItem ();
 	GoAwayAndDie ();
diff --git a/src/g_strife/a_crusader.cpp b/src/g_strife/a_crusader.cpp
index 9fef47f09..b54fdd427 100644
--- a/src/g_strife/a_crusader.cpp
+++ b/src/g_strife/a_crusader.cpp
@@ -13,7 +13,7 @@ static bool CrusaderCheckRange (AActor *self)
 {
 	if (self->reactiontime == 0 && P_CheckSight (self, self->target))
 	{
-		return self->AproxDistance (self->target) < 264*FRACUNIT;
+		return self->Distance2D (self->target) < 264.;
 	}
 	return false;
 }
@@ -29,18 +29,18 @@ DEFINE_ACTION_FUNCTION(AActor, A_CrusaderChoose)
 	{
 		A_FaceTarget (self);
 		self->Angles.Yaw -= 180./16;
-		P_SpawnMissileZAimed (self, self->_f_Z() + 40*FRACUNIT, self->target, PClass::FindActor("FastFlameMissile"));
+		P_SpawnMissileZAimed (self, self->Z() + 40, self->target, PClass::FindActor("FastFlameMissile"));
 	}
 	else
 	{
 		if (P_CheckMissileRange (self))
 		{
 			A_FaceTarget (self);
-			P_SpawnMissileZAimed (self, self->_f_Z() + 56*FRACUNIT, self->target, PClass::FindActor("CrusaderMissile"));
+			P_SpawnMissileZAimed (self, self->Z() + 56, self->target, PClass::FindActor("CrusaderMissile"));
 			self->Angles.Yaw -= 45./32;
-			P_SpawnMissileZAimed (self, self->_f_Z() + 40*FRACUNIT, self->target, PClass::FindActor("CrusaderMissile"));
+			P_SpawnMissileZAimed (self, self->Z() + 40, self->target, PClass::FindActor("CrusaderMissile"));
 			self->Angles.Yaw += 45./16;
-			P_SpawnMissileZAimed (self, self->_f_Z() + 40*FRACUNIT, self->target, PClass::FindActor("CrusaderMissile"));
+			P_SpawnMissileZAimed (self, self->Z() + 40, self->target, PClass::FindActor("CrusaderMissile"));
 			self->Angles.Yaw -= 45./16;
 			self->reactiontime += 15;
 		}
@@ -54,7 +54,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_CrusaderSweepLeft)
 	PARAM_ACTION_PROLOGUE;
 
 	self->Angles.Yaw += 90./16;
-	AActor *misl = P_SpawnMissileZAimed (self, self->_f_Z() + 48*FRACUNIT, self->target, PClass::FindActor("FastFlameMissile"));
+	AActor *misl = P_SpawnMissileZAimed (self, self->Z() + 48, self->target, PClass::FindActor("FastFlameMissile"));
 	if (misl != NULL)
 	{
 		misl->Vel.Z += 1;
@@ -67,7 +67,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_CrusaderSweepRight)
 	PARAM_ACTION_PROLOGUE;
 
 	self->Angles.Yaw -= 90./16;
-	AActor *misl = P_SpawnMissileZAimed (self, self->_f_Z() + 48*FRACUNIT, self->target, PClass::FindActor("FastFlameMissile"));
+	AActor *misl = P_SpawnMissileZAimed (self, self->Z() + 48, self->target, PClass::FindActor("FastFlameMissile"));
 	if (misl != NULL)
 	{
 		misl->Vel.Z += 1;
@@ -94,7 +94,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_CrusaderDeath)
 
 	if (CheckBossDeath (self))
 	{
-		EV_DoFloor (DFloor::floorLowerToLowest, NULL, 667, FRACUNIT, 0, -1, 0, false);
+		EV_DoFloor (DFloor::floorLowerToLowest, NULL, 667, 1., 0., -1, 0, false);
 	}
 	return 0;
 }
diff --git a/src/g_strife/a_entityboss.cpp b/src/g_strife/a_entityboss.cpp
index 2913a7f8a..349942fe2 100644
--- a/src/g_strife/a_entityboss.cpp
+++ b/src/g_strife/a_entityboss.cpp
@@ -27,8 +27,7 @@ void A_SpectralMissile (AActor *self, const char *missilename)
 {
 	if (self->target != NULL)
 	{
-		AActor *missile = P_SpawnMissileXYZ (self->PosPlusZ(32*FRACUNIT), 
-			self, self->target, PClass::FindActor(missilename), false);
+		AActor *missile = P_SpawnMissileXYZ (self->PosPlusZ(32.), self, self->target, PClass::FindActor(missilename), false);
 		if (missile != NULL)
 		{
 			missile->tracer = self->target;
@@ -78,7 +77,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_SpawnEntity)
 {
 	PARAM_ACTION_PROLOGUE;
 
-	AActor *entity = Spawn("EntityBoss", self->PosPlusZ(70*FRACUNIT), ALLOW_REPLACE);
+	AActor *entity = Spawn("EntityBoss", self->PosPlusZ(70), ALLOW_REPLACE);
 	if (entity != NULL)
 	{
 		entity->Angles.Yaw = self->Angles.Yaw;
@@ -94,7 +93,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_EntityDeath)
 	PARAM_ACTION_PROLOGUE;
 
 	AActor *second;
-	double secondRadius = FIXED2DBL(GetDefaultByName("EntitySecond")->_f_radius() * 2);
+	double secondRadius = GetDefaultByName("EntitySecond")->radius * 2;
 
 	static const double turns[3] = { 0, 90, -90 };
 	const double velmul[3] = { 4.8828125f, secondRadius*4, secondRadius*4 };
diff --git a/src/g_strife/a_inquisitor.cpp b/src/g_strife/a_inquisitor.cpp
index 368df7621..101959ffb 100644
--- a/src/g_strife/a_inquisitor.cpp
+++ b/src/g_strife/a_inquisitor.cpp
@@ -23,7 +23,7 @@ bool InquisitorCheckDistance (AActor *self)
 {
 	if (self->reactiontime == 0 && P_CheckSight (self, self->target))
 	{
-		return self->AproxDistance (self->target) < 264*FRACUNIT;
+		return self->Distance2D (self->target) < 264.;
 	}
 	return false;
 }
@@ -61,20 +61,20 @@ DEFINE_ACTION_FUNCTION(AActor, A_InquisitorAttack)
 
 	A_FaceTarget (self);
 
-	self->_f_AddZ(32*FRACUNIT);
+	self->AddZ(32);
 	self->Angles.Yaw -= 45./32;
-	proj = P_SpawnMissileZAimed (self, self->_f_Z(), self->target, PClass::FindActor("InquisitorShot"));
+	proj = P_SpawnMissileZAimed (self, self->Z(), self->target, PClass::FindActor("InquisitorShot"));
 	if (proj != NULL)
 	{
 		proj->Vel.Z += 9;
 	}
 	self->Angles.Yaw += 45./16;
-	proj = P_SpawnMissileZAimed (self, self->_f_Z(), self->target, PClass::FindActor("InquisitorShot"));
+	proj = P_SpawnMissileZAimed (self, self->Z(), self->target, PClass::FindActor("InquisitorShot"));
 	if (proj != NULL)
 	{
 		proj->Vel.Z += 16;
 	}
-	self->_f_AddZ(-32*FRACUNIT);
+	self->AddZ(-32);
 	return 0;
 }
 
@@ -89,7 +89,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_InquisitorJump)
 		return 0;
 
 	S_Sound (self, CHAN_ITEM|CHAN_LOOP, "inquisitor/jump", 1, ATTN_NORM);
-	self->_f_AddZ(64*FRACUNIT);
+	self->AddZ(64);
 	A_FaceTarget (self);
 	speed = self->Speed * (2./3);
 	self->VelFromAngle(speed);
@@ -127,7 +127,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_TossArm)
 {
 	PARAM_ACTION_PROLOGUE;
 
-	AActor *foo = Spawn("InquisitorArm", self->PosPlusZ(24*FRACUNIT), ALLOW_REPLACE);
+	AActor *foo = Spawn("InquisitorArm", self->PosPlusZ(24), ALLOW_REPLACE);
 	foo->Angles.Yaw = self->Angles.Yaw - 90. + pr_inq.Random2() * (360./1024.);
 	foo->VelFromAngle(foo->Speed / 8);
 	foo->Vel.Z = pr_inq() / 64.;
diff --git a/src/g_strife/a_loremaster.cpp b/src/g_strife/a_loremaster.cpp
index 85ef0ba2b..ead116c63 100644
--- a/src/g_strife/a_loremaster.cpp
+++ b/src/g_strife/a_loremaster.cpp
@@ -37,7 +37,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_LoremasterChain)
 
 	S_Sound (self, CHAN_BODY, "loremaster/active", 1, ATTN_NORM);
 	Spawn("LoreShot2", self->Pos(), ALLOW_REPLACE);
-	Spawn("LoreShot2", self->Vec3Offset(-(self->_f_velx() >> 1), -(self->_f_vely() >> 1), -(self->_f_velz() >> 1)), ALLOW_REPLACE);
-	Spawn("LoreShot2", self->Vec3Offset(-self->_f_velx(), -self->_f_vely(), -self->_f_velz()), ALLOW_REPLACE);
+	Spawn("LoreShot2", self->Vec3Offset(-self->Vel/2.), ALLOW_REPLACE);
+	Spawn("LoreShot2", self->Vec3Offset(-self->Vel), ALLOW_REPLACE);
 	return 0;
 }
diff --git a/src/g_strife/a_programmer.cpp b/src/g_strife/a_programmer.cpp
index cbdc4a14c..951e9d954 100644
--- a/src/g_strife/a_programmer.cpp
+++ b/src/g_strife/a_programmer.cpp
@@ -130,7 +130,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_SpawnProgrammerBase)
 {
 	PARAM_ACTION_PROLOGUE;
 
-	AActor *foo = Spawn("ProgrammerBase", self->PosPlusZ(24*FRACUNIT), ALLOW_REPLACE);
+	AActor *foo = Spawn("ProgrammerBase", self->PosPlusZ(24), ALLOW_REPLACE);
 	if (foo != NULL)
 	{
 		foo->Angles.Yaw = self->Angles.Yaw + 180. + pr_prog.Random2() * (360. / 1024.);
diff --git a/src/g_strife/a_rebels.cpp b/src/g_strife/a_rebels.cpp
index ba9213471..dd5267c60 100644
--- a/src/g_strife/a_rebels.cpp
+++ b/src/g_strife/a_rebels.cpp
@@ -78,10 +78,9 @@ DEFINE_ACTION_FUNCTION(AActor, A_Beacon)
 
 	AActor *owner = self->target;
 	AActor *rebel;
-	angle_t an;
 
 	rebel = Spawn("Rebel1", self->PosAtZ(self->floorz), ALLOW_REPLACE);
-	if (!P_TryMove (rebel, rebel->X(), rebel->Y(), true))
+	if (!P_TryMove (rebel, rebel->Pos(), true))
 	{
 		rebel->Destroy ();
 		return 0;
@@ -116,8 +115,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_Beacon)
 
 	rebel->SetState (rebel->SeeState);
 	rebel->Angles.Yaw = self->Angles.Yaw;
-	an = self->_f_angle() >> ANGLETOFINESHIFT;
-	Spawn<ATeleportFog> (rebel->Vec3Offset(20*finecosine[an], 20*finesine[an], TELEFOGHEIGHT), ALLOW_REPLACE);
+	Spawn<ATeleportFog> (rebel->Vec3Angle(20., self->Angles.Yaw, TELEFOGHEIGHT), ALLOW_REPLACE);
 	if (--self->health < 0)
 	{
 		self->SetState(self->FindState(NAME_Death));
diff --git a/src/g_strife/a_sentinel.cpp b/src/g_strife/a_sentinel.cpp
index eb282fcce..977098df4 100644
--- a/src/g_strife/a_sentinel.cpp
+++ b/src/g_strife/a_sentinel.cpp
@@ -53,14 +53,14 @@ DEFINE_ACTION_FUNCTION(AActor, A_SentinelAttack)
 		return 0;
 	}
 
-	missile = P_SpawnMissileZAimed (self, self->_f_Z() + 32*FRACUNIT, self->target, PClass::FindActor("SentinelFX2"));
+	missile = P_SpawnMissileZAimed (self, self->Z() + 32, self->target, PClass::FindActor("SentinelFX2"));
 
 	if (missile != NULL && (missile->Vel.X != 0 || missile->Vel.Y != 0))
 	{
 		for (int i = 8; i > 1; --i)
 		{
 			trail = Spawn("SentinelFX1",
-				self->_f_Vec3Angle(missile->_f_radius()*i, missile->_f_angle(), (missile->_f_velz() / 4 * i)), ALLOW_REPLACE);
+				self->Vec3Angle(missile->radius*i, missile->Angles.Yaw, missile->Vel.Z / 4 * i), ALLOW_REPLACE);
 			if (trail != NULL)
 			{
 				trail->target = self;
diff --git a/src/g_strife/a_spectral.cpp b/src/g_strife/a_spectral.cpp
index 9e06433a1..00b19055c 100644
--- a/src/g_strife/a_spectral.cpp
+++ b/src/g_strife/a_spectral.cpp
@@ -28,7 +28,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_SpectralLightningTail)
 {
 	PARAM_ACTION_PROLOGUE;
 
-	AActor *foo = Spawn("SpectralLightningHTail", self->Vec3Offset(-self->_f_velx(), -self->_f_vely(), 0), ALLOW_REPLACE);
+	AActor *foo = Spawn("SpectralLightningHTail", self->Vec3Offset(-self->Vel.X, -self->Vel.Y, 0.), ALLOW_REPLACE);
 
 	foo->Angles.Yaw = self->Angles.Yaw;
 	foo->FriendPlayer = self->FriendPlayer;
@@ -66,21 +66,20 @@ DEFINE_ACTION_FUNCTION(AActor, A_SpectralLightning)
 	self->Vel.X += pr_zap5.Random2(3);
 	self->Vel.Y += pr_zap5.Random2(3);
 
-	fixedvec2 pos = self->Vec2Offset(
-		pr_zap5.Random2(3) * FRACUNIT * 50,
-		pr_zap5.Random2(3) * FRACUNIT * 50);
+	double xo = pr_zap5.Random2(3) * 50.;
+	double yo = pr_zap5.Random2(3) * 50.;
 
 	flash = Spawn (self->threshold > 25 ? PClass::FindActor(NAME_SpectralLightningV2) :
-		PClass::FindActor(NAME_SpectralLightningV1), pos.x, pos.y, ONCEILINGZ, ALLOW_REPLACE);
+		PClass::FindActor(NAME_SpectralLightningV1), self->Vec2OffsetZ(xo, yo, ONCEILINGZ), ALLOW_REPLACE);
 
 	flash->target = self->target;
-	flash->Vel.Z = -18*FRACUNIT;
+	flash->Vel.Z = -18;
 	flash->FriendPlayer = self->FriendPlayer;
 
-	flash = Spawn(NAME_SpectralLightningV2, self->_f_X(), self->_f_Y(), ONCEILINGZ, ALLOW_REPLACE);
+	flash = Spawn(NAME_SpectralLightningV2, self->PosAtZ(ONCEILINGZ), ALLOW_REPLACE);
 
 	flash->target = self->target;
-	flash->Vel.Z = -18 * FRACUNIT;
+	flash->Vel.Z = -18;
 	flash->FriendPlayer = self->FriendPlayer;
 	return 0;
 }
@@ -94,8 +93,8 @@ DEFINE_ACTION_FUNCTION(AActor, A_Tracer2)
 	PARAM_ACTION_PROLOGUE;
 
 	AActor *dest;
-	fixed_t dist;
-	fixed_t slope;
+	double dist;
+	double slope;
 
 	dest = self->tracer;
 
@@ -123,21 +122,16 @@ DEFINE_ACTION_FUNCTION(AActor, A_Tracer2)
 	if (!(self->flags3 & (MF3_FLOORHUGGER|MF3_CEILINGHUGGER)))
 	{
 		// change slope
-		dist = self->AproxDistance (dest) / self->_f_speed();
-
-		if (dist < 1)
+		dist = self->DistanceBySpeed (dest, self->Speed);
+		if (dest->Height >= 56)
 		{
-			dist = 1;
-		}
-		if (dest->_f_height() >= 56*FRACUNIT)
-		{
-			slope = (dest->_f_Z()+40*FRACUNIT - self->_f_Z()) / dist;
+			slope = (dest->Z()+40 - self->Z()) / dist;
 		}
 		else
 		{
-			slope = (dest->_f_Z() + self->_f_height()*2/3 - self->_f_Z()) / dist;
+			slope = (dest->Z() + self->Height*(2./3) - self->Z()) / dist;
 		}
-		if (slope < self->_f_velz())
+		if (slope < self->Vel.Z)
 		{
 			self->Vel.Z -= 1 / 8.;
 		}
diff --git a/src/g_strife/a_strifeitems.cpp b/src/g_strife/a_strifeitems.cpp
index 896357c8d..45e8218e1 100644
--- a/src/g_strife/a_strifeitems.cpp
+++ b/src/g_strife/a_strifeitems.cpp
@@ -82,7 +82,7 @@ bool AHealthTraining::TryPickup (AActor *&toucher)
 	if (Super::TryPickup (toucher))
 	{
 		toucher->GiveInventoryType (PClass::FindActor("GunTraining"));
-		AInventory *coin = Spawn<ACoin> (0,0,0, NO_REPLACE);
+		AInventory *coin = Spawn<ACoin> ();
 		if (coin != NULL)
 		{
 			coin->Amount = toucher->player->mo->accuracy*5 + 300;
@@ -135,7 +135,7 @@ IMPLEMENT_CLASS (APrisonPass)
 bool APrisonPass::TryPickup (AActor *&toucher)
 {
 	Super::TryPickup (toucher);
-	EV_DoDoor (DDoor::doorOpen, NULL, toucher, 223, 2*FRACUNIT, 0, 0, 0);
+	EV_DoDoor (DDoor::doorOpen, NULL, toucher, 223, 2., 0, 0, 0);
 	toucher->GiveInventoryType (QuestItemClasses[9]);
 	return true;
 }
@@ -152,7 +152,7 @@ bool APrisonPass::TryPickup (AActor *&toucher)
 
 bool APrisonPass::SpecialDropAction (AActor *dropper)
 {
-	EV_DoDoor (DDoor::doorOpen, NULL, dropper, 223, 2*FRACUNIT, 0, 0, 0);
+	EV_DoDoor (DDoor::doorOpen, NULL, dropper, 223, 2., 0, 0, 0);
 	Destroy ();
 	return true;
 }
@@ -210,7 +210,7 @@ IMPLEMENT_CLASS (AOpenDoor222)
 
 bool AOpenDoor222::TryPickup (AActor *&toucher)
 {
-	EV_DoDoor (DDoor::doorOpen, NULL, toucher, 222, 2*FRACUNIT, 0, 0, 0);
+	EV_DoDoor (DDoor::doorOpen, NULL, toucher, 222, 2., 0, 0, 0);
 	GoAwayAndDie ();
 	return true;
 }
@@ -229,14 +229,14 @@ IMPLEMENT_CLASS (ACloseDoor222)
 
 bool ACloseDoor222::TryPickup (AActor *&toucher)
 {
-	EV_DoDoor (DDoor::doorClose, NULL, toucher, 222, 2*FRACUNIT, 0, 0, 0);
+	EV_DoDoor (DDoor::doorClose, NULL, toucher, 222, 2., 0, 0, 0);
 	GoAwayAndDie ();
 	return true;
 }
 
 bool ACloseDoor222::SpecialDropAction (AActor *dropper)
 {
-	EV_DoDoor (DDoor::doorClose, NULL, dropper, 222, 2*FRACUNIT, 0, 0, 0);
+	EV_DoDoor (DDoor::doorClose, NULL, dropper, 222, 2., 0, 0, 0);
 	if (dropper->target->CheckLocalView (consoleplayer))
 	{
 		Printf ("You're dead!  You set off the alarm.\n");
@@ -260,14 +260,14 @@ IMPLEMENT_CLASS (AOpenDoor224)
 
 bool AOpenDoor224::TryPickup (AActor *&toucher)
 {
-	EV_DoDoor (DDoor::doorOpen, NULL, toucher, 224, 2*FRACUNIT, 0, 0, 0);
+	EV_DoDoor (DDoor::doorOpen, NULL, toucher, 224, 2., 0, 0, 0);
 	GoAwayAndDie ();
 	return true;
 }
 
 bool AOpenDoor224::SpecialDropAction (AActor *dropper)
 {
-	EV_DoDoor (DDoor::doorOpen, NULL, dropper, 224, 2*FRACUNIT, 0, 0, 0);
+	EV_DoDoor (DDoor::doorOpen, NULL, dropper, 224, 2., 0, 0, 0);
 	Destroy ();
 	return true;
 }
diff --git a/src/g_strife/a_strifestuff.cpp b/src/g_strife/a_strifestuff.cpp
index beb64e2dd..c845c253c 100644
--- a/src/g_strife/a_strifestuff.cpp
+++ b/src/g_strife/a_strifestuff.cpp
@@ -58,354 +58,6 @@
 //		angle += pr_spawnmissile.Random2() << 22
 // Note that these numbers are different from those used by all the other Doom engine games.
 
-/* These mobjinfos have been converted:
-
-	  0 ForceFieldGuard
-	  1 StrifePlayer
-	  2 WeaponSmith
-	  3 BarKeep
-	  4 Armorer
-	  5 Medic
-	  6 Peasant1
-	  7 Peasant2
-	  8 Peasant3
-	  9 Peasant4
-     10 Peasant5
-	 11 Peasant6
-	 12 Peasant7
-	 13 Peasant8
-	 14 Peasant9
-	 15 Peasant10
-	 16 Peasant11
-	 17 Peasant12
-	 18 Peasant13
-	 19 Peasant14
-	 20 Peasant15
-	 21 Peasant16
-	 22 Peasant17
-	 23 Peasant18
-	 24 Peasant19
-	 25 Peasant20
-	 26 Peasant21
-     27 Peasant22
-	 28 Zombie
-	 29 AcolyteToBe
-	 30 ZombieSpawner
-	 31 Tank1
-	 32 Tank2
-	 33 Tank3
-	 34 Tank4
-	 35 Tank5
-	 36 Tank6
-	 37 KneelingGuy
-	 38 Beggar1
-	 39 Beggar2
-	 40 Beggar3
-	 41 Beggar4
-	 42 Beggar5
-	 43 Rebel1
-	 44 Rebel2
-	 45 Rebel3
-	 46 Rebel4
-	 47 Rebel5
-	 48 Rebel6
-	 49 Macil1
-	 50 Macil2
-	 51 RocketTrail
-	 52 Reaver
-	 53 AcolyteTan
-	 54 AcolyteRed
-	 55 AcolyteRust
-	 56 AcolyteGray
-	 57 AcolyteDGreen
-	 58 AcolyteGold
-	 59 AcolyteLGreen
-	 60 AcolyteBlue
-	 61 AcolyteShadow
-	 62 Templar
-	 63 Crusader
-	 64 StrifeBishop
-	 65 Oracle
-	 66 Loremaster (aka Priest)
-	 67 AlienSpectre1
-	 68 AlienChunkSmall
-	 69 AlienChunkLarge
-	 70 AlienSpectre2
-	 71 AlienSpectre3
-	 72 AlienSpectre4
-	 73 AlienSpectre5
-	 74 EntityBoss
-	 75 EntitySecond
-	 76 EntityNest
-	 77 EntityPod
-	 78 SpectralLightningH1
-	 79 SpectralLightningH2
-	 80 SpectralLightningBall1
-	 81 SpectralLightningBall2
-	 82 SpectralLightningH3
-	 83 SpectralLightningHTail
-	 84 SpectralLightningBigBall1
-	 85 SpectralLightningBigBall2
-	 86 SpectralLightningV1
-	 87 SpectralLightningV2
-	 88 SpectralLightningSpot
-	 89 SpectralLightningBigV1
-	 90 SpectralLightningBigV2
-	 91 Sentinel
-	 92 Stalker
-	 93 Inquisitor
-	 94 InquisitorArm
-	 95 Programmer
-	 96 ProgrammerBase
-	 97 LoreShot
-	 98 LoreShot2
-	 99 MiniMissile
-    100 CrusaderMissile
-	101 BishopMissile
-    102 ElectricBolt
-	103 PoisonBolt
-	104 SentinelFX1
-	105 SentinelFX2
-	106 HEGrenade
-	107 PhosphorousGrenade
-	108 InquisitorShot
-	109 PhosphorousFire
-	110 MaulerTorpedo
-	111 MaulerTorpedoWave
-	112 FlameMissile
-	113 FastFlameMissile
-	114 MaulerPuff
-	115 StrifePuff
-    116 StrifeSpark
-	117 Blood
-	118 TeleportFog
-	119 ItemFog
-	120 teleport destination
-	121 KlaxonWarningLight
-	122 CeilingTurret
-	123 Piston
-	124 Computer
-	125 MedPatch
-	126 MedicalKit
-	127 SurgeryKit
-	128 DegninOre
-	129 MetalArmor
-	130 LeatherArmor
-	131 WaterBottle
-	132 Mug
-	133 BaseKey
-	134 GovsKey
-	135 Passcard
-	136 IDBadge
-	137 PrisonKey
-	138 SeveredHand
-	139 Power1Key
-	140 Power2Key
-	141 Power3Key
-	142 GoldKey
-	143 IDCard
-	144 SilverKey
-	145 OracleKey
-	146 MilitaryID
-	147 OrderKey
-	148 WarehouseKey
-	149 BrassKey
-	150 RedCrystalKey
-	151 BlueCrystalKey
-	152 ChapelKey
-	153 CatacombKey
-	154 SecurityKey
-	155 CoreKey
-	156 MaulerKey
-	157 FactoryKey
-	158 MineKey
-	159 NewKey5
-	160 ShadowArmor
-	161 EnvironmentalSuit
-	162 GuardUniform
-	163 OfficersUniform
-	164 StrifeMap
-	165 Scanner
-	166
-	167 Targeter
-	168 Coin
-	169 Gold10
-	170 Gold25
-	171 Gold50
-	172 Gold300
-	173 BeldinsRing
-	174 OfferingChalice
-	175 Ear
-	176 Communicator
-	177 HEGrenadeRounds
-	178 PhosphorusGrenadeRounds
-	179 ClipOfBullets
-	180 BoxOfBullets
-	181 MiniMissiles
-	182 CrateOfMissiles
-	183 EnergyPod
-	184 EnergyPack
-	185 PoisonBolts
-	186 ElectricBolts
-	187 AmmoSatchel
-	188 AssaultGun
-	189 AssaultGunStanding
-	190 FlameThrower
-	191 FlameThrowerParts
-	192 MiniMissileLauncher
-	193 Mauler
-	194 StrifeCrossbow
-	195 StrifeGrenadeLauncher
-	196 Sigil1
-	197 Sigil2
-	198 Sigil3
-	199 Sigil4
-	200 Sigil5
-	201 PowerCrystal
-	202 RatBuddy
-	203 WoodenBarrel
-	204 ExplosiveBarrel2
-	205 TargetPractice
-	206 LightSilverFluorescent
-	207 LightBrownFluorescent
-	208 LightGoldFluorescent
-	209 LightGlobe
-	210 PillarTechno
-	211 PillarAztec
-	212 PillarAztecDamaged
-	213 PillarAztecRuined
-	214 PillarHugeTech
-	215 PillarAlienPower
-	216 SStalactiteBig
-	217 SStalactiteSmall
-	218 SStalagmiteBig
-	219 CavePillarTop
-	220 CavePillarBottom
-	221 SStalagmiteSmall
-	222 Candle
-	223 StrifeCandelabra
-	224 WaterDropOnFloor
-	225 WaterfallSplash
-	226 WaterDrip
-	227 WaterFountain
-	228 HeartsInTank
-	229 TeleportSwirl
-	230 DeadCrusader
-	231 DeadStrifePlayer
-	232 DeadPeasant
-	233 DeadAcolyte
-	234 DeadReaver
-	235 DeadRebel
-	236 SacrificedGuy
-	237 PileOfGuts
-	238 StrifeBurningBarrel
-	239 BurningBowl
-	240 BurningBrazier
-	241 SmallTorchLit
-	242 SmallTorchUnlit
-	243 CeilingChain
-	244 CageLight
-	245 Statue
-	246 StatueRuined
-	247 MediumTorch
-	248 OutsideLamp
-	249 PoleLantern
-	250 SRock1
-	251 SRock2
-	252 SRock3
-	253 SRock4
-	254 StickInWater
-	255 Rubble1
-	256 Rubble2
-	257 Rubble3
-	258 Rubble4
-	259 Rubble5
-	260 Rubble6
-	261 Rubble7
-	262 Rubble8
-	263 SurgeryCrab
-	264 LargeTorch
-	265 HugeTorch
-	266 PalmTree
-	267 BigTree2
-	268 PottedTree
-	269 TreeStub
-	270 ShortBush
-	271 TallBush
-	272 ChimneyStack
-	273 BarricadeColumn
-	274 Pot
-	275 Pitcher
-	276 Stool
-	277 MetalPot
-	278 Tub
-	279 Anvil
-	280 TechLampSilver
-	281 TechLampBrass
-	282 Tray
-	283 AmmoFiller
-	284 SigilBanner
-	285 RebelBoots
-	286 RebelHelmet
-	287 RebelShirt
-	288 PowerCoupling
-	289 BrokenPowerCoupling
-	290 AlienBubbleColumn
-	291 AlienFloorBubble
-	292 AlienCeilingBubble
-	293 AlienAspClimber
-	294 AlienSpiderLight
-	295 Meat
-	296 Junk
-	297 FireDroplet
-	298 AmmoFillup
-	299 HealthFillup
-	300 Info
-	301 RaiseAlarm
-	302 OpenDoor222
-	303 CloseDoor222
-	304 PrisonPass
-	305 OpenDoor224
-	306 UpgradeStamina
-	307 UpgradeAccuracy
-	308 InterrogatorReport (seems to be unused)
-	309 HealthTraining
-	310 GunTraining
-	311 OraclePass
-	312 QuestItem1
-	313 QuestItem2
-	314 QuestItem3
-	315 QuestItem4
-	316 QuestItem5
-	317 QuestItem6
-	318 QuestItem7
-	319 QuestItem8
-	320 QuestItem9
-	321 QuestItem10
-	322 QuestItem11
-	323 QuestItem12
-	324 QuestItem13
-	325 QuestItem14
-	326 QuestItem15
-	327 QuestItem16
-	328 QuestItem17
-	329 QuestItem18
-	330 QuestItem19
-	331 QuestItem20
-	332 QuestItem21
-	333 QuestItem22
-	334 QuestItem23
-	335 QuestItem24
-	336 QuestItem25
-	337 QuestItem26
-	338 QuestItem27
-	339 QuestItem28
-	340 QuestItem29
-	341 QuestItem30
-	342 QuestItem31
-	343 SlideshowStarter
-*/	
-
 static FRandom pr_gibtosser ("GibTosser");
 
 // Force Field Guard --------------------------------------------------------
@@ -438,7 +90,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_SetShadow)
 
 	self->flags |= MF_STRIFEx8000000|MF_SHADOW;
 	self->RenderStyle = STYLE_Translucent;
-	self->alpha = HR_SHADOW;
+	self->Alpha = HR_SHADOW;
 	return 0;
 }
 
@@ -448,7 +100,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_ClearShadow)
 
 	self->flags &= ~(MF_STRIFEx8000000|MF_SHADOW);
 	self->RenderStyle = STYLE_Normal;
-	self->alpha = OPAQUE;
+	self->Alpha = 1.;
 	return 0;
 }
 
@@ -564,8 +216,8 @@ void APowerCoupling::Die (AActor *source, AActor *inflictor, int dmgflags)
 	{
 		P_NoiseAlert (source, this);
 	}
-	EV_DoDoor (DDoor::doorClose, NULL, players[i].mo, 225, 2*FRACUNIT, 0, 0, 0);
-	EV_DoFloor (DFloor::floorLowerToHighest, NULL, 44, FRACUNIT, 0, -1, 0, false);
+	EV_DoDoor (DDoor::doorClose, NULL, players[i].mo, 225, 2., 0, 0, 0);
+	EV_DoFloor (DFloor::floorLowerToHighest, NULL, 44, 1., 0., -1, 0, false);
 	players[i].mo->GiveInventoryType (QuestItemClasses[5]);
 	S_Sound (CHAN_VOICE, "svox/voc13", 1, ATTN_NORM);
 	players[i].SetLogNumber (13);
@@ -599,7 +251,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_TossGib)
 	PARAM_ACTION_PROLOGUE;
 
 	const char *gibtype = (self->flags & MF_NOBLOOD) ? "Junk" : "Meat";
-	AActor *gib = Spawn (gibtype, self->PosPlusZ(24*FRACUNIT), ALLOW_REPLACE);
+	AActor *gib = Spawn (gibtype, self->PosPlusZ(24), ALLOW_REPLACE);
 
 	if (gib == NULL)
 	{
@@ -654,7 +306,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_CheckTerrain)
 
 	sector_t *sec = self->Sector;
 
-	if (self->_f_Z() == sec->floorplane.ZatPoint(self) && sec->PortalBlocksMovement(sector_t::floor))
+	if (self->Z() == sec->floorplane.ZatPointF(self) && sec->PortalBlocksMovement(sector_t::floor))
 	{
 		if (sec->special == Damage_InstantDeath)
 		{
@@ -714,8 +366,8 @@ DEFINE_ACTION_FUNCTION(AActor, A_DropFire)
 {
 	PARAM_ACTION_PROLOGUE;
 
-	AActor *drop = Spawn("FireDroplet", self->PosPlusZ(24*FRACUNIT), ALLOW_REPLACE);
-	drop->Vel.Z = -FRACUNIT;
+	AActor *drop = Spawn("FireDroplet", self->PosPlusZ(24.), ALLOW_REPLACE);
+	drop->Vel.Z = -1.;
 	P_RadiusAttack (self, self, 64, 64, NAME_Fire, 0);
 	return 0;
 }
diff --git a/src/g_strife/a_strifeweapons.cpp b/src/g_strife/a_strifeweapons.cpp
index 1447603ab..5eee0827a 100644
--- a/src/g_strife/a_strifeweapons.cpp
+++ b/src/g_strife/a_strifeweapons.cpp
@@ -147,7 +147,7 @@ enum
 DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_AlertMonsters)
 {
 	PARAM_ACTION_PROLOGUE;
-	PARAM_FIXED_OPT(maxdist) { maxdist = 0; }
+	PARAM_FLOAT_OPT(maxdist) { maxdist = 0; }
 	PARAM_INT_OPT(Flags) { Flags = 0; }
 
 	AActor * target = NULL;
@@ -379,8 +379,8 @@ DEFINE_ACTION_FUNCTION(AActor, A_RocketInFlight)
 	AActor *trail;
 
 	S_Sound (self, CHAN_VOICE, "misc/missileinflight", 1, ATTN_NORM);
-	P_SpawnPuff (self, PClass::FindActor("MiniMissilePuff"), self->_f_Pos(), self->_f_angle() - ANGLE_180, 2, PF_HITTHING);
-	trail = Spawn("RocketTrail", self->Vec3Offset(-self->_f_velx(), -self->_f_vely(), 0), ALLOW_REPLACE);
+	P_SpawnPuff (self, PClass::FindActor("MiniMissilePuff"), self->Pos(), self->Angles.Yaw - 180, self->Angles.Yaw - 180, 2, PF_HITTHING);
+	trail = Spawn("RocketTrail", self->Vec3Offset(-self->Vel.X, -self->Vel.Y, 0.), ALLOW_REPLACE);
 	if (trail != NULL)
 	{
 		trail->Vel.Z = 1;
@@ -547,11 +547,11 @@ DEFINE_ACTION_FUNCTION(AActor, A_MaulerTorpedoWave)
 	PARAM_ACTION_PROLOGUE;
 
 	AActor *wavedef = GetDefaultByName("MaulerTorpedoWave");
-	fixed_t savedz;
+	double savedz;
 	self->Angles.Yaw += 180.;
 
 	// If the torpedo hit the ceiling, it should still spawn the wave
-	savedz = self->_f_Z();
+	savedz = self->Z();
 	if (wavedef && self->ceilingz < wavedef->Top())
 	{
 		self->SetZ(self->ceilingz - wavedef->Height);
@@ -562,13 +562,13 @@ DEFINE_ACTION_FUNCTION(AActor, A_MaulerTorpedoWave)
 		self->Angles.Yaw += 4.5;
 		P_SpawnSubMissile (self, PClass::FindActor("MaulerTorpedoWave"), self->target);
 	}
-	self->_f_SetZ(savedz);
+	self->SetZ(savedz);
 	return 0;
 }
 
 AActor *P_SpawnSubMissile (AActor *source, PClassActor *type, AActor *target)
 {
-	AActor *other = Spawn (type, source->_f_Pos(), ALLOW_REPLACE);
+	AActor *other = Spawn (type, source->Pos(), ALLOW_REPLACE);
 
 	if (other == NULL)
 	{
@@ -594,7 +594,7 @@ AActor *P_SpawnSubMissile (AActor *source, PClassActor *type, AActor *target)
 	if (P_CheckMissileSpawn (other, source->radius))
 	{
 		DAngle pitch = P_AimLineAttack (source, source->Angles.Yaw, 1024.);
-		other->Vel.Z = -other->Speed * pitch.Cos();
+		other->Vel.Z = -other->Speed * pitch.Sin();
 		return other;
 	}
 	return NULL;
@@ -639,7 +639,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_Burnination)
 	if (!(self->flags & MF_DROPPED))
 	{
 		// Original x and y offsets seemed to be like this:
-		//		x + (((pr_phburn() + 12) & 31) << FRACBITS);
+		//		x + (((pr_phburn() + 12) & 31) << F.RACBITS);
 		//
 		// But that creates a lop-sided burn because it won't use negative offsets.
 		int xofs, xrand = pr_phburn();
@@ -658,19 +658,16 @@ DEFINE_ACTION_FUNCTION(AActor, A_Burnination)
 			yofs = -yofs;
 		}
 
-		fixedvec2 pos = self->Vec2Offset(xofs << FRACBITS, yofs << FRACBITS);
-		sector_t * sector = P_PointInSector(pos.x, pos.y);
+		DVector2 pos = self->Vec2Offset((double)xofs, (double)yofs);
+		sector_t * sector = P_PointInSector(pos);
 
 		// The sector's floor is too high so spawn the flame elsewhere.
-		if (sector->floorplane.ZatPoint(pos.x, pos.y) > self->_f_Z() + self->MaxStepHeight)
+		if (sector->floorplane.ZatPoint(pos) > self->Z() + self->MaxStepHeight)
 		{
-			pos.x = self->_f_X();
-			pos.y = self->_f_Y();
+			pos = self->Pos();
 		}
 
-		AActor *drop = Spawn<APhosphorousFire> (
-			pos.x, pos.y,
-			self->_f_Z() + 4*FRACUNIT, ALLOW_REPLACE);
+		AActor *drop = Spawn<APhosphorousFire> (pos.X, pos.Y, self->Z() + 4., ALLOW_REPLACE);
 		if (drop != NULL)
 		{
 			drop->Vel.X = self->Vel.X + pr_phburn.Random2 (7);
@@ -693,13 +690,12 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_FireGrenade)
 {
 	PARAM_ACTION_PROLOGUE;
 	PARAM_CLASS(grenadetype, AActor);
-	PARAM_ANGLE(angleofs);
+	PARAM_DANGLE(angleofs);
 	PARAM_STATE(flash)
 
 	player_t *player = self->player;
 	AActor *grenade;
-	angle_t an;
-	fixed_t tworadii;
+	DAngle an;
 	AWeapon *weapon;
 
 	if (player == NULL || grenadetype == NULL)
@@ -715,9 +711,9 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_FireGrenade)
 
 	if (grenadetype != NULL)
 	{
-		self->_f_AddZ(32*FRACUNIT);
+		self->AddZ(32);
 		grenade = P_SpawnSubMissile (self, grenadetype, self);
-		self->_f_AddZ(-32*FRACUNIT);
+		self->AddZ(-32);
 		if (grenade == NULL)
 			return 0;
 
@@ -728,20 +724,10 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_FireGrenade)
 
 		grenade->Vel.Z = (-self->Angles.Pitch.TanClamped()) * grenade->Speed + 8;
 
-		fixedvec2 offset;
-
-		an = self->_f_angle() >> ANGLETOFINESHIFT;
-		tworadii = self->_f_radius() + grenade->_f_radius();
-		offset.x = FixedMul (finecosine[an], tworadii);
-		offset.y = FixedMul (finesine[an], tworadii);
-
-		an = self->_f_angle() + angleofs;
-		an >>= ANGLETOFINESHIFT;
-		offset.x += FixedMul (finecosine[an], 15*FRACUNIT);
-		offset.y += FixedMul (finesine[an], 15*FRACUNIT);
-
-		fixedvec2 newpos = grenade->Vec2Offset(offset.x, offset.y);
-		grenade->SetOrigin(newpos.x, newpos.y, grenade->_f_Z(), false);
+		DVector2 offset = self->Angles.Yaw.ToVector(self->radius + grenade->radius);
+		DAngle an = self->Angles.Yaw + angleofs;
+		offset += an.ToVector(15);
+		grenade->SetOrigin(grenade->Vec3Offset(offset.X, offset.Y, 0.), false);
 	}
 	return 0;
 }
@@ -814,7 +800,7 @@ bool ASigil::HandlePickup (AInventory *item)
 
 AInventory *ASigil::CreateCopy (AActor *other)
 {
-	ASigil *copy = Spawn<ASigil> (0,0,0, NO_REPLACE);
+	ASigil *copy = Spawn<ASigil> ();
 	copy->Amount = Amount;
 	copy->MaxAmount = MaxAmount;
 	copy->NumPieces = NumPieces;
@@ -995,7 +981,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_FireSigil1)
 	}
 	else
 	{
-		spot = Spawn("SpectralLightningSpot", self->_f_Pos(), ALLOW_REPLACE);
+		spot = Spawn("SpectralLightningSpot", self->Pos(), ALLOW_REPLACE);
 		if (spot != NULL)
 		{
 			spot->VelFromAngle(self->Angles.Yaw, 28.);
@@ -1058,7 +1044,7 @@ DEFINE_ACTION_FUNCTION(AActor, A_FireSigil3)
 		spot = P_SpawnSubMissile (self, PClass::FindActor("SpectralLightningBall1"), self);
 		if (spot != NULL)
 		{
-			spot->_f_SetZ(self->_f_Z() + 32*FRACUNIT);
+			spot->SetZ(self->Z() + 32);
 		}
 	}
 	self->Angles.Yaw -= 90.;
@@ -1167,7 +1153,7 @@ int ASigil::GiveSigilPiece (AActor *receiver)
 	sigil = receiver->FindInventory<ASigil> ();
 	if (sigil == NULL)
 	{
-		sigil = static_cast<ASigil*>(Spawn("Sigil1", 0,0,0, NO_REPLACE));
+		sigil = static_cast<ASigil*>(Spawn("Sigil1"));
 		if (!sigil->CallTryPickup (receiver))
 		{
 			sigil->Destroy ();
diff --git a/src/g_strife/a_thingstoblowup.cpp b/src/g_strife/a_thingstoblowup.cpp
index 5e4b5deff..1dc72b118 100644
--- a/src/g_strife/a_thingstoblowup.cpp
+++ b/src/g_strife/a_thingstoblowup.cpp
@@ -18,9 +18,9 @@ DEFINE_ACTION_FUNCTION(AActor, A_Bang4Cloud)
 {
 	PARAM_ACTION_PROLOGUE;
 
-	fixed_t xo = (pr_bang4cloud.Random2() & 3) * 10240;
-	fixed_t yo = (pr_bang4cloud.Random2() & 3) * 10240;
-	Spawn("Bang4Cloud", self->Vec3Offset(xo, yo, 0), ALLOW_REPLACE);
+	double xo = (pr_bang4cloud.Random2() & 3) * (10. / 64);
+	double yo = (pr_bang4cloud.Random2() & 3) * (10. / 64);
+	Spawn("Bang4Cloud", self->Vec3Offset(xo, yo, 0.), ALLOW_REPLACE);
 	return 0;
 }
 
@@ -38,7 +38,7 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_GiveQuestItem)
 		{
 			if (playeringame[i])
 			{
-				AInventory *item = static_cast<AInventory *>(Spawn (QuestItemClasses[questitem - 1], 0,0,0, NO_REPLACE));
+				AInventory *item = static_cast<AInventory *>(Spawn (QuestItemClasses[questitem - 1]));
 				if (!item->CallTryPickup (players[i].mo))
 				{
 					item->Destroy ();
diff --git a/src/g_strife/strife_sbar.cpp b/src/g_strife/strife_sbar.cpp
index 2257ee268..dfdd9dbb5 100644
--- a/src/g_strife/strife_sbar.cpp
+++ b/src/g_strife/strife_sbar.cpp
@@ -327,7 +327,7 @@ private:
 
 		if (ItemFlash > 0)
 		{
-			ItemFlash -= FRACUNIT/14;
+			ItemFlash -= 1/14.;
 			if (ItemFlash < 0)
 			{
 				ItemFlash = 0;
@@ -379,7 +379,7 @@ private:
 
 	void FlashItem (const PClass *itemtype)
 	{
-		ItemFlash = FRACUNIT*3/4;
+		ItemFlash = 0.75;
 	}
 
 	void DrawMainBar ()
@@ -454,7 +454,7 @@ private:
 				screen->DrawTexture (Images[CursorImage],
 					42 + 35*i + ST_X, 12 + ST_Y,
 					DTA_Bottom320x200, Scaled,
-					DTA_Alpha, FRACUNIT - ItemFlash,
+					DTA_AlphaF, 1. - ItemFlash,
 					TAG_DONE);
 			}
 			if (item->Icon.isValid())
@@ -526,7 +526,7 @@ private:
 						DTA_HUDRules, HUD_Normal,
 						DTA_LeftOffset, cursor->GetWidth(),
 						DTA_TopOffset, cursor->GetHeight(),
-						DTA_Alpha, ItemFlash,
+						DTA_AlphaF, ItemFlash,
 						TAG_DONE);
 				}
 				DrINumberOuter (CPlayer->mo->InvSel->Amount, -51, -10, false, 7);
@@ -583,7 +583,7 @@ private:
 		left = screen->GetWidth()/2 - 160*CleanXfac;
 		top = bottom + height * yscale;
 
-		screen->DrawTexture (Images[back], left, top, DTA_CleanNoMove, true, DTA_Alpha, FRACUNIT*3/4, TAG_DONE);
+		screen->DrawTexture (Images[back], left, top, DTA_CleanNoMove, true, DTA_AlphaF, 0.75, TAG_DONE);
 		screen->DrawTexture (Images[bars], left, top, DTA_CleanNoMove, true, TAG_DONE);
 
 
@@ -847,7 +847,7 @@ private:
 	int CursorImage;
 	int CurrentPop, PendingPop, PopHeight, PopHeightChange;
 	int KeyPopPos, KeyPopScroll;
-	fixed_t ItemFlash;
+	double ItemFlash;
 };
 
 IMPLEMENT_CLASS(DStrifeStatusBar);
diff --git a/src/gi.cpp b/src/gi.cpp
index 405e42ce7..7881c0006 100644
--- a/src/gi.cpp
+++ b/src/gi.cpp
@@ -133,6 +133,13 @@ const char* GameInfoBorders[] =
 		gameinfo.key = static_cast<float> (sc.Float); \
 	}
 
+#define GAMEINFOKEY_DOUBLE(key, variable) \
+	else if(nextKey.CompareNoCase(variable) == 0) \
+	{ \
+		sc.MustGetFloat(); \
+		gameinfo.key = sc.Float; \
+	}
+
 #define GAMEINFOKEY_FIXED(key, variable) \
 	else if(nextKey.CompareNoCase(variable) == 0) \
 	{ \
@@ -310,7 +317,7 @@ void FMapInfoParser::ParseGameInfo()
 		GAMEINFOKEY_STRING(PauseSign, "pausesign")
 		GAMEINFOKEY_STRING(quitSound, "quitSound")
 		GAMEINFOKEY_STRING(BorderFlat, "borderFlat")
-		GAMEINFOKEY_FIXED(telefogheight, "telefogheight")
+		GAMEINFOKEY_DOUBLE(telefogheight, "telefogheight")
 		GAMEINFOKEY_FIXED(gibfactor, "gibfactor")
 		GAMEINFOKEY_INT(defKickback, "defKickback")
 		GAMEINFOKEY_STRING(SkyFlatName, "SkyFlatName")
diff --git a/src/gi.h b/src/gi.h
index 8bdfc7e3e..07839cacd 100644
--- a/src/gi.h
+++ b/src/gi.h
@@ -138,7 +138,7 @@ struct gameinfo_t
 	fixed_t Armor2Percent;
 	FString quitSound;
 	gameborder_t Border;
-	int telefogheight;
+	double telefogheight;
 	int defKickback;
 	FString translator;
 	DWORD defaultbloodcolor;
diff --git a/src/intermission/intermission.cpp b/src/intermission/intermission.cpp
index 3fe677da6..49e875195 100644
--- a/src/intermission/intermission.cpp
+++ b/src/intermission/intermission.cpp
@@ -627,7 +627,7 @@ void DIntermissionScreenCast::Drawer ()
 			DTA_DestHeightF, pic->GetScaledHeightDouble() * castscale.Y,
 			DTA_DestWidthF, pic->GetScaledWidthDouble() * castscale.X,
 			DTA_RenderStyle, mDefaults->RenderStyle,
-			DTA_Alpha, mDefaults->alpha,
+			DTA_AlphaF, mDefaults->Alpha,
 			DTA_Translation, casttranslation,
 			TAG_DONE);
 	}
diff --git a/src/m_cheat.cpp b/src/m_cheat.cpp
index 595b19e82..5b88b5658 100644
--- a/src/m_cheat.cpp
+++ b/src/m_cheat.cpp
@@ -694,7 +694,7 @@ void cht_Give (player_t *player, const char *name, int amount)
 				AInventory *ammo = player->mo->FindInventory(atype);
 				if (ammo == NULL)
 				{
-					ammo = static_cast<AInventory *>(Spawn (atype, 0, 0, 0, NO_REPLACE));
+					ammo = static_cast<AInventory *>(Spawn (atype));
 					ammo->AttachToOwner (player->mo);
 					ammo->Amount = ammo->MaxAmount;
 				}
@@ -713,7 +713,7 @@ void cht_Give (player_t *player, const char *name, int amount)
 	{
 		if (gameinfo.gametype != GAME_Hexen)
 		{
-			ABasicArmorPickup *armor = Spawn<ABasicArmorPickup> (0,0,0, NO_REPLACE);
+			ABasicArmorPickup *armor = Spawn<ABasicArmorPickup> ();
 			armor->SaveAmount = 100*deh.BlueAC;
 			armor->SavePercent = gameinfo.Armor2Percent > 0? gameinfo.Armor2Percent : FRACUNIT/2;
 			if (!armor->CallTryPickup (player->mo))
@@ -725,7 +725,7 @@ void cht_Give (player_t *player, const char *name, int amount)
 		{
 			for (i = 0; i < 4; ++i)
 			{
-				AHexenArmor *armor = Spawn<AHexenArmor> (0,0,0, NO_REPLACE);
+				AHexenArmor *armor = Spawn<AHexenArmor> ();
 				armor->health = i;
 				armor->Amount = 0;
 				if (!armor->CallTryPickup (player->mo))
@@ -748,7 +748,7 @@ void cht_Give (player_t *player, const char *name, int amount)
 				AKey *key = (AKey *)GetDefaultByType (PClassActor::AllActorClasses[i]);
 				if (key->KeyNumber != 0)
 				{
-					key = static_cast<AKey *>(Spawn(static_cast<PClassActor *>(PClassActor::AllActorClasses[i]), 0,0,0, NO_REPLACE));
+					key = static_cast<AKey *>(Spawn(static_cast<PClassActor *>(PClassActor::AllActorClasses[i])));
 					if (!key->CallTryPickup (player->mo))
 					{
 						key->Destroy ();
@@ -1071,8 +1071,8 @@ public:
 		Pawn->flags |= MF_SHOOTABLE;
 		Pawn->flags2 &= ~MF2_INVULNERABLE;
 		// Store the player's current damage factor, to restore it later.
-		fixed_t plyrdmgfact = Pawn->DamageFactor;
-		Pawn->DamageFactor = 65536;
+		double plyrdmgfact = Pawn->DamageFactor;
+		Pawn->DamageFactor = 1.;
 		P_DamageMobj (Pawn, Pawn, Pawn, TELEFRAG_DAMAGE, NAME_Suicide);
 		Pawn->DamageFactor = plyrdmgfact;
 		if (Pawn->health <= 0)
diff --git a/src/menu/menu.cpp b/src/menu/menu.cpp
index 115b6818f..081a6e446 100644
--- a/src/menu/menu.cpp
+++ b/src/menu/menu.cpp
@@ -680,12 +680,12 @@ void M_Ticker (void)
 		}
 		if (BackbuttonTime > 0)
 		{
-			if (BackbuttonAlpha < FRACUNIT) BackbuttonAlpha += FRACUNIT/10;
+			if (BackbuttonAlpha < OPAQUE) BackbuttonAlpha += OPAQUE/10;
 			BackbuttonTime--;
 		}
 		else
 		{
-			if (BackbuttonAlpha > 0) BackbuttonAlpha -= FRACUNIT/10;
+			if (BackbuttonAlpha > 0) BackbuttonAlpha -= OPAQUE/10;
 			if (BackbuttonAlpha < 0) BackbuttonAlpha = 0;
 		}
 	}
diff --git a/src/p_3dfloors.cpp b/src/p_3dfloors.cpp
index fe1553fef..6dbb341b3 100644
--- a/src/p_3dfloors.cpp
+++ b/src/p_3dfloors.cpp
@@ -191,7 +191,7 @@ static void P_Add3DFloor(sector_t* sec, sector_t* sec2, line_t* master, int flag
 	// The engine cannot handle sloped translucent floors. Sorry
 	if (ffloor->top.plane->a || ffloor->top.plane->b || ffloor->bottom.plane->a || ffloor->bottom.plane->b)
 	{
-		ffloor->alpha = FRACUNIT;
+		ffloor->alpha = OPAQUE;
 		ffloor->flags &= ~FF_ADDITIVETRANS;
 	}
 
@@ -813,7 +813,7 @@ void P_LineOpening_XFloors (FLineOpening &open, AActor * thing, const line_t *li
 						highestfloorsec = j == 0 ? linedef->frontsector : linedef->backsector;
 						highestfloorplanes[j] = rover->top.plane;
 					}
-					if(ff_top > lowestfloor[j] && ff_top <= thing->_f_Z() + thing->MaxStepHeight) lowestfloor[j] = ff_top;
+					if(ff_top > lowestfloor[j] && ff_top <= thing->_f_Z() + thing->_f_MaxStepHeight()) lowestfloor[j] = ff_top;
 				}
 			}
 			
diff --git a/src/p_3dmidtex.cpp b/src/p_3dmidtex.cpp
index eeef7e7fe..ffeb32e6f 100644
--- a/src/p_3dmidtex.cpp
+++ b/src/p_3dmidtex.cpp
@@ -299,7 +299,7 @@ bool P_LineOpening_3dMidtex(AActor *thing, const line_t *linedef, FLineOpening &
 
 			}
 			// returns true if it touches the midtexture
-			return (abs(thing->_f_Z() - tt) <= thing->MaxStepHeight);
+			return (abs(thing->_f_Z() - tt) <= thing->_f_MaxStepHeight());
 		}
 	}
 	return false;
diff --git a/src/p_acs.cpp b/src/p_acs.cpp
index db588efba..dbfe1db29 100644
--- a/src/p_acs.cpp
+++ b/src/p_acs.cpp
@@ -1150,7 +1150,7 @@ static void DoGiveInv (AActor *actor, PClassActor *info, int amount)
 		? actor->player->PendingWeapon : NULL;
 	bool hadweap = actor->player != NULL ? actor->player->ReadyWeapon != NULL : true;
 
-	AInventory *item = static_cast<AInventory *>(Spawn (info, 0,0,0, NO_REPLACE));
+	AInventory *item = static_cast<AInventory *>(Spawn (info));
 
 	// This shouldn't count for the item statistics!
 	item->ClearCounters();
@@ -3843,7 +3843,7 @@ void DLevelScript::DoSetActorProperty (AActor *actor, int property, int value)
 		break;
 
 	case APROP_Alpha:
-		actor->alpha = value;
+		actor->Alpha = ACSToDouble(value);
 		break;
 
 	case APROP_RenderStyle:
@@ -3954,7 +3954,7 @@ void DLevelScript::DoSetActorProperty (AActor *actor, int property, int value)
 		break;
 
 	case APROP_DamageFactor:
-		actor->DamageFactor = value;
+		actor->DamageFactor = ACSToDouble(value);
 		break;
 
 	case APROP_DamageMultiplier:
@@ -4037,9 +4037,9 @@ int DLevelScript::GetActorProperty (int tid, int property)
 	case APROP_Health:		return actor->health;
 	case APROP_Speed:		return DoubleToACS(actor->Speed);
 	case APROP_Damage:		return actor->GetMissileDamage(0,1);
-	case APROP_DamageFactor:return actor->DamageFactor;
+	case APROP_DamageFactor:return DoubleToACS(actor->DamageFactor);
 	case APROP_DamageMultiplier: return actor->DamageMultiply;
-	case APROP_Alpha:		return actor->alpha;
+	case APROP_Alpha:		return DoubleToACS(actor->Alpha);
 	case APROP_RenderStyle:	for (int style = STYLE_None; style < STYLE_Count; ++style)
 							{ // Check for a legacy render style that matches.
 								if (LegacyRenderStyles[style] == actor->RenderStyle)
@@ -4214,7 +4214,7 @@ bool DLevelScript::DoCheckActorTexture(int tid, AActor *activator, int string, b
 
 	if (floor)
 	{
-		actor->Sector->NextLowestFloorAt(actor->_f_X(), actor->_f_Y(), actor->_f_Z(), 0, actor->MaxStepHeight, &resultsec, &resffloor);
+		actor->Sector->NextLowestFloorAt(actor->_f_X(), actor->_f_Y(), actor->_f_Z(), 0, actor->_f_MaxStepHeight(), &resultsec, &resffloor);
 		secpic = resffloor ? *resffloor->top.texture : resultsec->planes[sector_t::floor].Texture;
 	}
 	else
@@ -8000,13 +8000,13 @@ scriptwait:
 					switch (type & 0xFF)
 					{
 					default:	// normal
-						alpha = (optstart < sp) ? Stack[optstart] : FRACUNIT;
+						alpha = (optstart < sp) ? Stack[optstart] : OPAQUE;
 						msg = new DHUDMessage (activefont, work, x, y, hudwidth, hudheight, color, holdTime);
 						break;
 					case 1:		// fade out
 						{
 							float fadeTime = (optstart < sp) ? ACSToFloat(Stack[optstart]) : 0.5f;
-							alpha = (optstart < sp-1) ? Stack[optstart+1] : FRACUNIT;
+							alpha = (optstart < sp-1) ? Stack[optstart+1] : OPAQUE;
 							msg = new DHUDMessageFadeOut (activefont, work, x, y, hudwidth, hudheight, color, holdTime, fadeTime);
 						}
 						break;
@@ -8022,7 +8022,7 @@ scriptwait:
 						{
 							float inTime = (optstart < sp) ? ACSToFloat(Stack[optstart]) : 0.5f;
 							float outTime = (optstart < sp-1) ? ACSToFloat(Stack[optstart+1]) : 0.5f;
-							alpha = (optstart < sp-2) ? Stack[optstart+2] : FRACUNIT;
+							alpha = (optstart < sp-2) ? Stack[optstart+2] : OPAQUE;
 							msg = new DHUDMessageFadeInOut (activefont, work, x, y, hudwidth, hudheight, color, holdTime, inTime, outTime);
 						}
 						break;
diff --git a/src/p_buildmap.cpp b/src/p_buildmap.cpp
index d2258eb53..25691aa3e 100644
--- a/src/p_buildmap.cpp
+++ b/src/p_buildmap.cpp
@@ -595,11 +595,11 @@ static void LoadWalls (walltype *walls, int numwalls, sectortype *bsec)
 		{
 			if (walls[i].cstat & 512)
 			{
-				lines[j].Alpha = FRACUNIT/3;
+				lines[j].Alpha = TRANSLUC33;
 			}
 			else
 			{
-				lines[j].Alpha = FRACUNIT*2/3;
+				lines[j].Alpha = TRANSLUC66;
 			}
 		}
 		if (walls[i].cstat & 1)
@@ -707,7 +707,7 @@ static int LoadSprites (spritetype *sprites, Xsprite *xsprites, int numsprites,
 		mapthings[count].special = 0;
 		mapthings[count].Gravity = 1.;
 		mapthings[count].RenderStyle = STYLE_Count;
-		mapthings[count].alpha = -1;
+		mapthings[count].Alpha = -1;
 		mapthings[count].health = -1;
 		mapthings[count].FloatbobPhase = -1;
 
@@ -890,7 +890,7 @@ void ACustomSprite::BeginPlay ()
 	if (cstat & 2)
 	{
 		RenderStyle = STYLE_Translucent;
-		alpha = (cstat & 512) ? TRANSLUC66 : TRANSLUC33;
+		Alpha = (cstat & 512) ? 0.6666 : 0.3333;
 	}
 	if (cstat & 4)
 		renderflags |= RF_XFLIP;
diff --git a/src/p_conversation.cpp b/src/p_conversation.cpp
index 79cb3385d..e8aaa6912 100644
--- a/src/p_conversation.cpp
+++ b/src/p_conversation.cpp
@@ -989,10 +989,10 @@ public:
 
 			mysnprintf (goldstr, countof(goldstr), "%d", coin != NULL ? coin->Amount : 0);
 			screen->DrawText (SmallFont, CR_GRAY, 21, 191, goldstr, DTA_320x200, true,
-				DTA_FillColor, 0, DTA_Alpha, HR_SHADOW, TAG_DONE);
+				DTA_FillColor, 0, DTA_AlphaF, HR_SHADOW, TAG_DONE);
 			screen->DrawTexture (TexMan(((AInventory *)GetDefaultByType (RUNTIME_CLASS(ACoin)))->Icon),
 				3, 190, DTA_320x200, true,
-				DTA_FillColor, 0, DTA_Alpha, HR_SHADOW, TAG_DONE);
+				DTA_FillColor, 0, DTA_AlphaF, HR_SHADOW, TAG_DONE);
 			screen->DrawText (SmallFont, CR_GRAY, 20, 190, goldstr, DTA_320x200, true, TAG_DONE);
 			screen->DrawTexture (TexMan(((AInventory *)GetDefaultByType (RUNTIME_CLASS(ACoin)))->Icon),
 				2, 189, DTA_320x200, true, TAG_DONE);
@@ -1268,7 +1268,7 @@ static void HandleReply(player_t *player, bool isconsole, int nodenum, int reply
 	
 			if (takestuff)
 			{
-				AInventory *item = static_cast<AInventory *>(Spawn(reply->GiveType, 0, 0, 0, NO_REPLACE));
+				AInventory *item = static_cast<AInventory *>(Spawn(reply->GiveType));
 				// Items given here should not count as items!
 				item->ClearCounters();
 				if (item->GetClass()->TypeName == NAME_FlameThrower)
diff --git a/src/p_enemy.cpp b/src/p_enemy.cpp
index 8c3a857bc..a1e5d063d 100644
--- a/src/p_enemy.cpp
+++ b/src/p_enemy.cpp
@@ -576,7 +576,7 @@ bool P_Move (AActor *actor)
 		!((actor->flags & MF_NOGRAVITY) || (actor->flags6 & MF6_CANJUMP))
 			&& actor->Z() > actor->floorz && !(actor->flags2 & MF2_ONMOBJ))
 	{
-		if (actor->_f_Z() <= actor->_f_floorz() + actor->MaxStepHeight)
+		if (actor->Z() <= actor->floorz + actor->MaxStepHeight)
 		{
 			double savedz = actor->Z();
 			actor->SetZ(actor->floorz);
@@ -2708,9 +2708,9 @@ static bool P_CheckForResurrection(AActor *self, bool usevilestates)
 					if (corpsehit->Height == 0)
 					{
 						// Make raised corpses look ghostly
-						if (corpsehit->alpha > TRANSLUC50)
+						if (corpsehit->Alpha > 0.5)
 						{
-							corpsehit->alpha /= 2;
+							corpsehit->Alpha /= 2;
 						}
 						// This will only work if the render style is changed as well.
 						if (corpsehit->RenderStyle == LegacyRenderStyles[STYLE_Normal])
diff --git a/src/p_enemy.h b/src/p_enemy.h
index ed1c9fcbc..467e74eba 100644
--- a/src/p_enemy.h
+++ b/src/p_enemy.h
@@ -50,6 +50,11 @@ void P_DaggerAlert (AActor *target, AActor *emitter);
 void P_RecursiveSound (sector_t *sec, AActor *soundtarget, bool splash, int soundblocks, AActor *emitter=NULL, fixed_t maxdist=0);
 bool P_HitFriend (AActor *self);
 void P_NoiseAlert (AActor *target, AActor *emmiter, bool splash=false, fixed_t maxdist=0);
+inline void P_NoiseAlert(AActor *target, AActor *emmiter, bool splash, double maxdist)
+{
+	P_NoiseAlert(target, emmiter, splash, FLOAT2FIXED(maxdist));
+}
+
 bool P_CheckMeleeRange2 (AActor *actor);
 bool P_Move (AActor *actor);
 bool P_TryWalk (AActor *actor);
@@ -57,7 +62,7 @@ void P_NewChaseDir (AActor *actor);
 AInventory *P_DropItem (AActor *source, PClassActor *type, int special, int chance);
 void P_TossItem (AActor *item);
 bool P_LookForPlayers (AActor *actor, INTBOOL allaround, FLookExParams *params);
-void A_Weave(AActor *self, int xyspeed, int zspeed, fixed_t xydist, fixed_t zdist);
+void A_Weave(AActor *self, int xyspeed, int zspeed, double xydist, double zdist);
 void A_Unblock(AActor *self, bool drop);
 
 DECLARE_ACTION(A_Look)
diff --git a/src/p_interaction.cpp b/src/p_interaction.cpp
index ba3d3af5d..6d047e6f3 100644
--- a/src/p_interaction.cpp
+++ b/src/p_interaction.cpp
@@ -1024,7 +1024,7 @@ int P_DamageMobj (AActor *target, AActor *inflictor, AActor *source, int damage,
 	// [RH] Andy Baker's Stealth monsters
 	if (target->flags & MF_STEALTH)
 	{
-		target->alpha = OPAQUE;
+		target->Alpha = 1.;
 		target->visdir = -1;
 	}
 	if (target->flags & MF_SKULLFLY)
@@ -1046,7 +1046,7 @@ int P_DamageMobj (AActor *target, AActor *inflictor, AActor *source, int damage,
 			if (player && damage > 1)
 			{
 				// Take half damage in trainer mode
-				damage = FixedMul(damage, G_SkillProperty(SKILLP_DamageFactor));
+				damage = int(damage * G_SkillProperty(SKILLP_DamageFactor));
 			}
 			// Special damage types
 			if (inflictor)
@@ -1091,11 +1091,7 @@ int P_DamageMobj (AActor *target, AActor *inflictor, AActor *source, int damage,
 			}
 			if (damage > 0 && !(flags & DMG_NO_FACTOR))
 			{
-				damage = FixedMul(damage, target->DamageFactor);
-				if (damage > 0)
-				{
-					damage = DamageTypeDefinition::ApplyMobjDamageFactor(damage, mod, target->GetClass()->DamageFactors);
-				}
+				damage = target->ApplyDamageFactor(mod, damage);
 			}
 
 			if (damage >= 0)
@@ -1221,7 +1217,7 @@ int P_DamageMobj (AActor *target, AActor *inflictor, AActor *source, int damage,
 		//Use the original damage to check for telefrag amount. Don't let the now-amplified damagetypes do it.
 		if (rawdamage < TELEFRAG_DAMAGE || (target->flags7 & MF7_LAXTELEFRAGDMG)) 
 		{ // Still allow telefragging :-(
-			damage = (int)((float)damage * level.teamdamage);
+			damage = (int)(damage * level.teamdamage);
 			if (damage < 0)
 			{
 				return damage;
@@ -1672,7 +1668,7 @@ bool P_PoisonPlayer (player_t *player, AActor *poisoner, AActor *source, int poi
 	}
 	if (source != NULL && source->player != player && player->mo->IsTeammate (source))
 	{
-		poison = (int)((float)poison * level.teamdamage);
+		poison = (int)(poison * level.teamdamage);
 	}
 	if (poison > 0)
 	{
@@ -1721,18 +1717,15 @@ void P_PoisonDamage (player_t *player, AActor *source, int damage,
 		return;
 	}
 	// Take half damage in trainer mode
-	damage = FixedMul(damage, G_SkillProperty(SKILLP_DamageFactor));
+	damage = int(damage * G_SkillProperty(SKILLP_DamageFactor));
 	// Handle passive damage modifiers (e.g. PowerProtection)
 	if (target->Inventory != NULL)
 	{
 		target->Inventory->ModifyDamage(damage, player->poisontype, damage, true);
 	}
 	// Modify with damage factors
-	damage = FixedMul(damage, target->DamageFactor);
-	if (damage > 0)
-	{
-		damage = DamageTypeDefinition::ApplyMobjDamageFactor(damage, player->poisontype, target->GetClass()->DamageFactors);
-	}
+	damage = target->ApplyDamageFactor(player->poisontype, damage);
+
 	if (damage <= 0)
 	{ // Damage was reduced to 0, so don't bother further.
 		return;
diff --git a/src/p_lnspec.cpp b/src/p_lnspec.cpp
index ecdb73a5d..47d909c61 100644
--- a/src/p_lnspec.cpp
+++ b/src/p_lnspec.cpp
@@ -3103,7 +3103,7 @@ FUNC(LS_TranslucentLine)
 	int linenum;
 	while ((linenum = itr.Next()) >= 0)
 	{
-		lines[linenum].Alpha = Scale(clamp(arg1, 0, 255), FRACUNIT, 255);
+		lines[linenum].Alpha = Scale(clamp(arg1, 0, 255), OPAQUE, 255);
 		if (arg2 == 0)
 		{
 			lines[linenum].flags &= ~ML_ADDTRANS;
diff --git a/src/p_local.h b/src/p_local.h
index aa691d4ce..6f33acc3f 100644
--- a/src/p_local.h
+++ b/src/p_local.h
@@ -124,7 +124,7 @@ void	P_PredictionLerpReset();
 APlayerPawn *P_SpawnPlayer (FPlayerStart *mthing, int playernum, int flags=0);
 
 int P_FaceMobj (AActor *source, AActor *target, DAngle *delta);
-bool P_SeekerMissile (AActor *actor, angle_t thresh, angle_t turnMax, bool precise = false, bool usecurspeed=false);
+bool P_SeekerMissile (AActor *actor, double thresh, double turnMax, bool precise = false, bool usecurspeed=false);
 
 enum EPuffFlags
 {
@@ -168,6 +168,10 @@ inline AActor *P_SpawnMissileXYZ(const fixedvec3 &pos, AActor *source, AActor *d
 {
 	return P_SpawnMissileXYZ(pos.x, pos.y, pos.z, source, dest, type, checkspawn, owner);
 }
+inline AActor *P_SpawnMissileXYZ(const DVector3 &pos, AActor *source, AActor *dest, PClassActor *type, bool checkspawn = true, AActor *owner = NULL)
+{
+	return P_SpawnMissileXYZ(FLOAT2FIXED(pos.X), FLOAT2FIXED(pos.Y), FLOAT2FIXED(pos.Z), source, dest, type, checkspawn, owner);
+}
 AActor *P_SpawnMissileAngle (AActor *source, PClassActor *type, angle_t angle, fixed_t vz);
 inline AActor *P_SpawnMissileAngle(AActor *source, PClassActor *type, DAngle angle, double vz)
 {
@@ -180,13 +184,23 @@ inline AActor *P_SpawnMissileAngleZ(AActor *source, double z, PClassActor *type,
 	return P_SpawnMissileAngleZ(source, FLOAT2FIXED(z), type, angle.BAMs(), FLOAT2FIXED(vz));
 }
 AActor *P_SpawnMissileAngleZSpeed (AActor *source, fixed_t z, PClassActor *type, angle_t angle, fixed_t vz, fixed_t speed, AActor *owner=NULL, bool checkspawn = true);
+inline AActor *P_SpawnMissileAngleZSpeed(AActor *source, double z, PClassActor *type, DAngle angle, double vz, double speed, AActor *owner = NULL, bool checkspawn = true)
+{
+	return P_SpawnMissileAngleZSpeed(source, FLOAT2FIXED(z), type, angle.BAMs(), FLOAT2FIXED(vz), FLOAT2FIXED(speed), owner, checkspawn);
+}
 AActor *P_SpawnMissileZAimed (AActor *source, fixed_t z, AActor *dest, PClassActor *type);
+inline AActor *P_SpawnMissileZAimed(AActor *source, double z, AActor *dest, PClassActor *type)
+{
+	return P_SpawnMissileZAimed(source, FLOAT2FIXED(z), dest, type);
+}
 
 AActor *P_SpawnPlayerMissile (AActor* source, PClassActor *type);
 AActor *P_SpawnPlayerMissile (AActor *source, PClassActor *type, DAngle angle);
-AActor *P_SpawnPlayerMissile (AActor *source, fixed_t x, fixed_t y, fixed_t z, PClassActor *type, DAngle angle, 
+
+AActor *P_SpawnPlayerMissile (AActor *source, double x, double y, double z, PClassActor *type, DAngle angle, 
 							  FTranslatedLineTarget *pLineTarget = NULL, AActor **MissileActor = NULL, bool nofreeaim = false, bool noautoaim = false, int aimflags = 0);
 
+
 void P_CheckFakeFloorTriggers (AActor *mo, fixed_t oldz, bool oldz_has_viewheight=false);
 
 AActor *P_SpawnSubMissile (AActor *source, PClassActor *type, AActor *target);	// Strife uses it
@@ -283,6 +297,10 @@ inline bool	P_TryMove(AActor* thing, double x, double y, int dropoff, const secp
 {
 	return P_TryMove(thing, FLOAT2FIXED(x), FLOAT2FIXED(y), dropoff, onfloor);
 }
+inline bool	P_TryMove(AActor* thing, const DVector2 &pos, int dropoff, const secplane_t * onfloor = NULL)
+{
+	return P_TryMove(thing, FLOAT2FIXED(pos.X), FLOAT2FIXED(pos.Y), dropoff, onfloor);
+}
 bool	P_CheckMove(AActor *thing, fixed_t x, fixed_t y);
 void	P_ApplyTorque(AActor *mo);
 bool	P_TeleportMove (AActor* thing, fixed_t x, fixed_t y, fixed_t z, bool telefrag, bool modifyactor = true);	// [RH] Added z and telefrag parameters
diff --git a/src/p_map.cpp b/src/p_map.cpp
index 993180b1f..318f2b95f 100644
--- a/src/p_map.cpp
+++ b/src/p_map.cpp
@@ -292,7 +292,7 @@ void P_GetFloorCeilingZ(FCheckPosition &tmf, int flags)
 	F3DFloor *ffc, *fff;
 
 	tmf.ceilingz = FIXED2DBL(sec->NextHighestCeilingAt(tmf.x, tmf.y, tmf.z, tmf.z + tmf.thing->_f_height(), flags, &tmf.ceilingsector, &ffc));
-	tmf.dropoffz = sec->NextLowestFloorAt(tmf.x, tmf.y, tmf.z, flags, tmf.thing->MaxStepHeight, &tmf.floorsector, &fff);
+	tmf.dropoffz = sec->NextLowestFloorAt(tmf.x, tmf.y, tmf.z, flags, tmf.thing->_f_MaxStepHeight(), &tmf.floorsector, &fff);
 	tmf.floorz = FIXED2DBL(tmf.dropoffz);
 
 	if (fff)
@@ -1224,7 +1224,7 @@ bool PIT_CheckThing(FMultiBlockThingsIterator &it, FMultiBlockThingsIterator::Ch
 		{
 			// [RH] Let monsters walk on actors as well as floors
 			if ((tm.thing->flags3 & MF3_ISMONSTER) &&
-				topz >= tm._f_floorz() && topz <= tm.thing->_f_Z() + tm.thing->MaxStepHeight)
+				topz >= tm._f_floorz() && topz <= tm.thing->_f_Z() + tm.thing->_f_MaxStepHeight())
 			{
 				// The commented-out if is an attempt to prevent monsters from walking off a
 				// thing further than they would walk off a ledge. I can't think of an easy
@@ -1549,7 +1549,7 @@ bool PIT_CheckThing(FMultiBlockThingsIterator &it, FMultiBlockThingsIterator::Ch
 		// [RH] The next condition is to compensate for the extra height
 		// that gets added by P_CheckPosition() so that you cannot pick
 		// up things that are above your true height.
-		&& thing->_f_Z() < tm.thing->_f_Top() - tm.thing->MaxStepHeight)
+		&& thing->Z() < tm.thing->Top() - tm.thing->MaxStepHeight)
 	{ // Can be picked up by tmthing
 		P_TouchSpecialThing(thing, tm.thing);	// can remove thing
 	}
@@ -1645,7 +1645,7 @@ bool P_CheckPosition(AActor *thing, fixed_t x, fixed_t y, FCheckPosition &tm, bo
 	thingblocker = NULL;
 	if (thing->player)
 	{ // [RH] Fake taller height to catch stepping up into things.
-		thing->Height = realHeight + FIXED2DBL(thing->MaxStepHeight);
+		thing->Height = realHeight + thing->MaxStepHeight;
 	}
 
 	tm.stepthing = NULL;
@@ -1671,17 +1671,17 @@ bool P_CheckPosition(AActor *thing, fixed_t x, fixed_t y, FCheckPosition &tm, bo
 				return false;
 			}
 			else if (!BlockingMobj->player && !(thing->flags & (MF_FLOAT | MF_MISSILE | MF_SKULLFLY)) &&
-				BlockingMobj->_f_Top() - thing->_f_Z() <= thing->MaxStepHeight)
+				BlockingMobj->Top() - thing->Z() <= thing->MaxStepHeight)
 			{
 				if (thingblocker == NULL ||
-					BlockingMobj->_f_Z() > thingblocker->_f_Z())
+					BlockingMobj->Z() > thingblocker->Z())
 				{
 					thingblocker = BlockingMobj;
 				}
 				thing->BlockingMobj = NULL;
 			}
 			else if (thing->player &&
-				thing->_f_Top() - BlockingMobj->_f_Z() <= thing->MaxStepHeight)
+				thing->Top() - BlockingMobj->Z() <= thing->MaxStepHeight)
 			{
 				if (thingblocker)
 				{ // There is something to step up on. Return this thing as
@@ -2054,8 +2054,8 @@ bool P_TryMove(AActor *thing, fixed_t x, fixed_t y,
 			{
 				goto pushline;
 			}
-			else if (BlockingMobj->_f_Top() - thing->_f_Z() > thing->MaxStepHeight
-				|| (BlockingMobj->Sector->ceilingplane.ZatPoint(x, y) - (BlockingMobj->_f_Top()) < thing->_f_height())
+			else if (BlockingMobj->Top() - thing->Z() > thing->MaxStepHeight
+				|| (BlockingMobj->Sector->ceilingplane._f_ZatPointF(x, y) - (BlockingMobj->Top()) < thing->Height)
 				|| (tm.ceilingz - (BlockingMobj->Top()) < thing->Height))
 			{
 				goto pushline;
@@ -2124,7 +2124,7 @@ bool P_TryMove(AActor *thing, fixed_t x, fixed_t y,
 			{ // [RH] Don't let normal missiles climb steps
 				goto pushline;
 			}
-			if (tm._f_floorz() - thing->_f_Z() > thing->MaxStepHeight)
+			if (tm.floorz - thing->Z() > thing->MaxStepHeight)
 			{ // too big a step up
 				goto pushline;
 			}
@@ -2281,8 +2281,8 @@ bool P_TryMove(AActor *thing, fixed_t x, fixed_t y,
 			side = P_PointOnLineSide(spec.refpos.x, spec.refpos.y, ld);
 			if (oldside == 0 && side == 1)
 			{
-				divline_t dl2 = { ld->v1->x, ld->v1->y, ld->dx, ld->dy };
-				divline_t dl1 = { spec.oldrefpos.x, spec.oldrefpos.y, spec.refpos.x - spec.oldrefpos.x, spec.refpos.y - spec.oldrefpos.y };
+				fdivline_t dl2 = { ld->v1->x, ld->v1->y, ld->dx, ld->dy };
+				fdivline_t dl1 = { spec.oldrefpos.x, spec.oldrefpos.y, spec.refpos.x - spec.oldrefpos.x, spec.refpos.y - spec.oldrefpos.y };
 				fixed_t frac = P_InterceptVector(&dl1, &dl2);
 				if (frac < bestfrac)
 				{
@@ -2337,7 +2337,7 @@ bool P_TryMove(AActor *thing, fixed_t x, fixed_t y,
 			// so that the renderer can properly calculate an interpolated position along the movement path.
 			if (thing == players[consoleplayer].camera)
 			{
-				divline_t dl1 = { besthit.oldrefpos.x,besthit. oldrefpos.y, besthit.refpos.x - besthit.oldrefpos.x, besthit.refpos.y - besthit.oldrefpos.y };
+				fdivline_t dl1 = { besthit.oldrefpos.x,besthit. oldrefpos.y, besthit.refpos.x - besthit.oldrefpos.x, besthit.refpos.y - besthit.oldrefpos.y };
 				fixedvec3a hit = { dl1.x + FixedMul(dl1.dx, bestfrac), dl1.y + FixedMul(dl1.dy, bestfrac), 0, 0. };
 
 				R_AddInterpolationPoint(hit);
@@ -2569,7 +2569,7 @@ bool P_CheckMove(AActor *thing, fixed_t x, fixed_t y)
 		}
 		if (!(thing->flags & MF_TELEPORT) && !(thing->flags3 & MF3_FLOORHUGGER))
 		{
-			if (tm._f_floorz() - newz > thing->MaxStepHeight)
+			if (tm._f_floorz() - newz > thing->_f_MaxStepHeight())
 			{ // too big a step up
 				return false;
 			}
@@ -2749,7 +2749,7 @@ void FSlide::HitSlideLine(line_t* ld)
 		}
 		else
 		{
-			divline_t dll, dlv;
+			fdivline_t dll, dlv;
 			fixed_t inter1, inter2, inter3;
 
 			P_MakeDivline(ld, &dll);
@@ -3034,7 +3034,7 @@ const secplane_t * P_CheckSlopeWalk(AActor *actor, fixed_t &xmove, fixed_t &ymov
 
 		fixed_t thisplanez = rover->top.plane->ZatPoint(pos);
 
-		if (thisplanez>planezhere && thisplanez <= actor->_f_Z() + actor->MaxStepHeight)
+		if (thisplanez>planezhere && thisplanez <= actor->_f_Z() + actor->_f_MaxStepHeight())
 		{
 			copyplane = *rover->top.plane;
 			if (copyplane.c<0) copyplane.FlipVert();
@@ -3052,7 +3052,7 @@ const secplane_t * P_CheckSlopeWalk(AActor *actor, fixed_t &xmove, fixed_t &ymov
 
 			fixed_t thisplanez = rover->top.plane->ZatPoint(actor);
 
-			if (thisplanez>planezhere && thisplanez <= actor->_f_Z() + actor->MaxStepHeight)
+			if (thisplanez>planezhere && thisplanez <= actor->_f_Z() + actor->_f_MaxStepHeight())
 			{
 				copyplane = *rover->top.plane;
 				if (copyplane.c<0) copyplane.FlipVert();
@@ -3107,7 +3107,7 @@ const secplane_t * P_CheckSlopeWalk(AActor *actor, fixed_t &xmove, fixed_t &ymov
 								pos.x += xmove;
 								pos.y += ymove;
 
-								if (sec->floorplane.ZatPoint(pos) >= actor->_f_Z() - actor->MaxStepHeight)
+								if (sec->floorplane.ZatPoint(pos) >= actor->_f_Z() - actor->_f_MaxStepHeight())
 								{
 									dopush = false;
 									break;
@@ -3554,7 +3554,7 @@ struct aim_t
 	//
 	//============================================================================
 
-	bool AimTraverse3DFloors(const divline_t &trace, intercept_t * in, int frontflag, int *planestocheck)
+	bool AimTraverse3DFloors(const fdivline_t &trace, intercept_t * in, int frontflag, int *planestocheck)
 	{
 		sector_t * nextsector;
 		secplane_t * nexttopplane, *nextbottomplane;
@@ -5086,7 +5086,7 @@ bool P_NoWayTraverse(AActor *usething, fixed_t startx, fixed_t starty, fixed_t e
 		if (ld->flags&(ML_BLOCKING | ML_BLOCKEVERYTHING | ML_BLOCK_PLAYERS)) return true;
 		P_LineOpening(open, NULL, ld, it.InterceptPoint(in));
 		if (open.range <= 0 ||
-			open.bottom > usething->_f_Z() + usething->MaxStepHeight ||
+			open.bottom > usething->_f_Z() + usething->_f_MaxStepHeight() ||
 			open.top < usething->_f_Top()) return true;
 	}
 	return false;
diff --git a/src/p_maputl.cpp b/src/p_maputl.cpp
index 46a0cda5f..51c79358d 100644
--- a/src/p_maputl.cpp
+++ b/src/p_maputl.cpp
@@ -73,7 +73,7 @@ fixed_t P_AproxDistance (fixed_t dx, fixed_t dy)
 //
 //==========================================================================
 
-fixed_t P_InterceptVector (const divline_t *v2, const divline_t *v1)
+fixed_t P_InterceptVector (const fdivline_t *v2, const fdivline_t *v1)
 {
 #if 0	// [RH] Use 64 bit ints, so long divlines don't overflow
 
@@ -387,7 +387,7 @@ bool AActor::FixMapthingPos()
 				continue;
 
 			// Get the exact distance to the line
-			divline_t dll, dlv;
+			fdivline_t dll, dlv;
 			fixed_t linelen = (fixed_t)g_sqrt((double)ldef->dx*ldef->dx + (double)ldef->dy*ldef->dy);
 
 			P_MakeDivline(ldef, &dll);
@@ -1106,6 +1106,9 @@ bool FMultiBlockThingsIterator::Next(FMultiBlockThingsIterator::CheckResult *ite
 		item->thing = thing;
 		item->position = checkpoint + Displacements.getOffset(basegroup, thing->Sector->PortalGroup);
 		item->portalflags = portalflags;
+
+		// same as above in floating point. This is here so that this stuff can be converted piece by piece.
+		item->Position = { FIXED2DBL(item->position.x), FIXED2DBL(item->position.y), FIXED2DBL(item->position.z) };
 		return true;
 	}
 	bool onlast = unsigned(index + 1) >= checklist.Size();
@@ -1194,7 +1197,7 @@ void FPathTraverse::AddLineIntercepts(int bx, int by)
 		int 				s1;
 		int 				s2;
 		fixed_t 			frac;
-		divline_t			dl;
+		fdivline_t			dl;
 
 		// avoid precision problems with two routines
 		if ( trace.dx > FRACUNIT*16
@@ -1244,7 +1247,7 @@ void FPathTraverse::AddThingIntercepts (int bx, int by, FBlockThingsIterator &it
 	while ((thing = it.Next(compatible)))
 	{
 		int numfronts = 0;
-		divline_t line;
+		fdivline_t line;
 		int i;
 
 
@@ -1355,7 +1358,7 @@ void FPathTraverse::AddThingIntercepts (int bx, int by, FBlockThingsIterator &it
 			// Old code for compatibility purposes
 			fixed_t 		x1, y1, x2, y2;
 			int 			s1, s2;
-			divline_t		dl;
+			fdivline_t		dl;
 			fixed_t 		frac;
 				
 			bool tracepositive = (trace.dx ^ trace.dy)>0;
@@ -1937,7 +1940,7 @@ int P_VanillaPointOnLineSide(fixed_t x, fixed_t y, const line_t* line)
 //
 //===========================================================================
 
-int P_VanillaPointOnDivlineSide(fixed_t x, fixed_t y, const divline_t* line)
+int P_VanillaPointOnDivlineSide(fixed_t x, fixed_t y, const fdivline_t* line)
 {
 	fixed_t	dx;
 	fixed_t	dy;
diff --git a/src/p_maputl.h b/src/p_maputl.h
index ddfed2fa6..6556029cd 100644
--- a/src/p_maputl.h
+++ b/src/p_maputl.h
@@ -7,7 +7,7 @@
 
 extern int validcount;
 
-struct divline_t
+struct fdivline_t
 {
 	fixed_t 	x;
 	fixed_t 	y;
@@ -15,6 +15,14 @@ struct divline_t
 	fixed_t 	dy;
 };
 
+struct divline_t
+{
+	double 	x;
+	double 	y;
+	double 	dx;
+	double 	dy;
+};
+
 struct intercept_t
 {
 	fixed_t 	frac;			// along trace line
@@ -73,20 +81,25 @@ inline int P_PointOnLineSidePrecise(const DVector3 &pt, const line_t *line)
 //
 //==========================================================================
 
-inline int P_PointOnDivlineSide (fixed_t x, fixed_t y, const divline_t *line)
+inline int P_PointOnDivlineSide (fixed_t x, fixed_t y, const fdivline_t *line)
 {
-	extern int P_VanillaPointOnDivlineSide(fixed_t x, fixed_t y, const divline_t* line);
+	extern int P_VanillaPointOnDivlineSide(fixed_t x, fixed_t y, const fdivline_t* line);
 
 	return (i_compatflags2 & COMPATF2_POINTONLINE)
 		? P_VanillaPointOnDivlineSide(x, y, line)
 		: (DMulScale32 (y-line->y, line->dx, line->x-x, line->dy) > 0);
 }
 
-inline int P_PointOnDivlineSidePrecise (fixed_t x, fixed_t y, const divline_t *line)
+inline int P_PointOnDivlineSidePrecise (fixed_t x, fixed_t y, const fdivline_t *line)
 {
 	return DMulScale32 (y-line->y, line->dx, line->x-x, line->dy) > 0;
 }
 
+inline int P_PointOnDivlineSidePrecise(double x, double y, const divline_t *line)
+{
+	return (y - line->y) * line->dx + (line->x - x) * line->dy > 0;
+}
+
 
 //==========================================================================
 //
@@ -94,7 +107,7 @@ inline int P_PointOnDivlineSidePrecise (fixed_t x, fixed_t y, const divline_t *l
 //
 //==========================================================================
 
-inline void P_MakeDivline (const line_t *li, divline_t *dl)
+inline void P_MakeDivline (const line_t *li, fdivline_t *dl)
 {
 	dl->x = li->v1->x;
 	dl->y = li->v1->y;
@@ -336,7 +349,8 @@ public:
 	struct CheckResult
 	{
 		AActor *thing;
-		fixedvec3 position;
+		fixedvec3 position;	// keep these both until the fixed version can be removed.
+		DVector3 Position;
 		int portalflags;
 	};
 
@@ -357,7 +371,7 @@ class FPathTraverse
 protected:
 	static TArray<intercept_t> intercepts;
 
-	divline_t trace;
+	fdivline_t trace;
 	fixed_t startfrac;
 	unsigned int intercept_index;
 	unsigned int intercept_count;
@@ -377,7 +391,7 @@ public:
 	void init(fixed_t x1, fixed_t y1, fixed_t x2, fixed_t y2, int flags, fixed_t startfrac = 0);
 	int PortalRelocate(intercept_t *in, int flags, fixedvec3 *optpos = NULL);
 	virtual ~FPathTraverse();
-	const divline_t &Trace() const { return trace; }
+	const fdivline_t &Trace() const { return trace; }
 
 	inline fixedvec2 InterceptPoint(const intercept_t *in)
 	{
@@ -418,7 +432,7 @@ typedef bool(*traverser_t) (intercept_t *in);
 fixed_t P_AproxDistance (fixed_t dx, fixed_t dy);
 
 
-fixed_t P_InterceptVector (const divline_t *v2, const divline_t *v1);
+fixed_t P_InterceptVector (const fdivline_t *v2, const fdivline_t *v1);
 
 #define PT_ADDLINES 	1
 #define PT_ADDTHINGS	2
diff --git a/src/p_mobj.cpp b/src/p_mobj.cpp
index 4b665bf53..c7090f60d 100644
--- a/src/p_mobj.cpp
+++ b/src/p_mobj.cpp
@@ -238,6 +238,8 @@ void AActor::Serialize(FArchive &arc)
 		<< __pos.y
 		<< __pos.z
 		<< Angles.Yaw
+		<< Angles.Pitch
+		<< Angles.Roll
 		<< frame
 		<< Scale
 		<< RenderStyle
@@ -249,10 +251,8 @@ void AActor::Serialize(FArchive &arc)
 		<< LastLookPlayerNumber
 		<< LastLookActor
 		<< effects
-		<< alpha
+		<< Alpha
 		<< fillcolor
-		<< Angles.Pitch	// move these up when savegame compatibility is broken!
-		<< Angles.Roll	// For now they have to remain here.
 		<< Sector
 		<< floorz
 		<< ceilingz
@@ -898,7 +898,7 @@ AInventory *AActor::GiveInventoryType (PClassActor *type)
 
 	if (type != NULL)
 	{
-		item = static_cast<AInventory *>(Spawn (type, 0,0,0, NO_REPLACE));
+		item = static_cast<AInventory *>(Spawn (type));
 		if (!item->CallTryPickup (this))
 		{
 			item->Destroy ();
@@ -920,7 +920,7 @@ bool AActor::GiveAmmo (PClassAmmo *type, int amount)
 {
 	if (type != NULL)
 	{
-		AInventory *item = static_cast<AInventory *>(Spawn (type, 0, 0, 0, NO_REPLACE));
+		AInventory *item = static_cast<AInventory *>(Spawn (type));
 		if (item)
 		{
 			item->Amount = amount;
@@ -1272,7 +1272,7 @@ bool AActor::Grind(bool items)
 			if (gib != NULL)
 			{
 				gib->RenderStyle = RenderStyle;
-				gib->alpha = alpha;
+				gib->Alpha = Alpha;
 				gib->Height = 0;
 				gib->radius = 0;
 
@@ -1469,18 +1469,18 @@ void P_ExplodeMissile (AActor *mo, line_t *line, AActor *target)
 				if (addrocketexplosion)
 				{
 					mo->RenderStyle = STYLE_Add;
-					mo->alpha = FRACUNIT;
+					mo->Alpha = 1.;
 				}
 				else
 				{
 					mo->RenderStyle = STYLE_Translucent;
-					mo->alpha = FRACUNIT*2/3;
+					mo->Alpha = 0.6666;
 				}
 			}
 			else
 			{
 				mo->RenderStyle = ERenderStyle(deh.ExplosionStyle);
-				mo->alpha = deh.ExplosionAlpha;
+				mo->Alpha = deh.ExplosionAlpha;
 			}
 		}
 
@@ -1666,7 +1666,7 @@ bool AActor::CanSeek(AActor *target) const
 	if ((flags2 & MF2_DONTSEEKINVISIBLE) && 
 		((target->flags & MF_SHADOW) || 
 		 (target->renderflags & RF_INVISIBLE) || 
-		 !target->RenderStyle.IsVisible(target->alpha)
+		 !target->RenderStyle.IsVisible(target->Alpha)
 		)
 	   ) return false;
 	return true;
@@ -1681,11 +1681,8 @@ bool AActor::CanSeek(AActor *target) const
 //
 //----------------------------------------------------------------------------
 
-bool P_SeekerMissile (AActor *actor, angle_t _thresh, angle_t _turnMax, bool precise, bool usecurspeed)
+bool P_SeekerMissile (AActor *actor, double thresh, double turnMax, bool precise, bool usecurspeed)
 {
-	DAngle thresh = ANGLE2DBL(_thresh);
-	DAngle turnMax = ANGLE2DBL(_turnMax);
-
 	int dir;
 	DAngle delta;
 	AActor *target;
@@ -1782,7 +1779,7 @@ fixed_t P_XYMovement (AActor *mo, fixed_t scrollx, fixed_t scrolly)
 	fixed_t oldz = mo->_f_Z();
 
 	double maxmove = (mo->waterlevel < 1) || (mo->flags & MF_MISSILE) || 
-					  (mo->player && mo->player->crouchoffset<-10*FRACUNIT) ? MAXMOVE : MAXMOVE/4;
+					  (mo->player && mo->player->crouchoffset<-10) ? MAXMOVE : MAXMOVE/4;
 
 	if (mo->flags2 & MF2_WINDTHRUST && mo->waterlevel < 2 && !(mo->flags & MF_NOCLIP))
 	{
@@ -2704,7 +2701,7 @@ static void PlayerLandedOnThing (AActor *mo, AActor *onmobj)
 
 	if (mo->player->mo == mo)
 	{
-		mo->player->deltaviewheight = mo->_f_velz() >> 3;
+		mo->player->deltaviewheight = mo->Vel.Z / 8.;
 	}
 
 	if (mo->player->cheats & CF_PREDICTING)
@@ -2829,7 +2826,7 @@ void P_NightmareRespawn (AActor *mobj)
 	P_SpawnTeleportFog(mobj, mobj->PosPlusZ(TELEFOGHEIGHT), true, true);
 
 	// spawn a teleport fog at the new spot
-	P_SpawnTeleportFog(mobj, x, y, z + TELEFOGHEIGHT, false, true);
+	P_SpawnTeleportFog(mobj, FIXED2DBL(x), FIXED2DBL(y), FIXED2DBL(z) + TELEFOGHEIGHT, false, true);
 
 	// remove the old monster
 	mobj->Destroy ();
@@ -3068,7 +3065,7 @@ bool AActor::Slam (AActor *thing)
 	return false;			// stop moving
 }
 
-bool AActor::SpecialBlastHandling (AActor *source, fixed_t strength)
+bool AActor::SpecialBlastHandling (AActor *source, double strength)
 {
 	return true;
 }
@@ -3086,7 +3083,7 @@ bool AActor::AdjustReflectionAngle (AActor *thing, DAngle &angle)
 	if (thing->flags4&MF4_SHIELDREFLECT)
 	{
 		// Shield reflection (from the Centaur)
-		if (diffangle(angle, thing->Angles.Yaw) > 45)
+		if (absangle(angle, thing->Angles.Yaw) > 45)
 			return true;	// Let missile explode
 
 		if (thing->IsKindOf (RUNTIME_CLASS(AHolySpirit)))	// shouldn't this be handled by another flag???
@@ -3500,19 +3497,19 @@ void AActor::Tick ()
 		{
 			if (visdir > 0)
 			{
-				alpha += 0x800;
-				if (alpha >= OPAQUE)
+				Alpha += 1/32.;
+				if (Alpha >= 1.)
 				{
-					alpha = OPAQUE;
+					Alpha = 1.;
 					visdir = -1;
 				}
 			}
 			else
 			{
-				alpha -= 0x800;
-				if (alpha <= TRANSLUC25)
+				Alpha -= 1/32.;
+				if (Alpha <= 0.25)
 				{
-					alpha = TRANSLUC25;
+					Alpha = 0.25;
 					visdir = 1;
 				}
 			}
@@ -3523,19 +3520,19 @@ void AActor::Tick ()
 			RenderStyle.Flags &= ~STYLEF_Alpha1;
 			if (visdir > 0)
 			{
-				alpha += 2*FRACUNIT/TICRATE;
-				if (alpha > OPAQUE)
+				Alpha += 2./TICRATE;
+				if (Alpha > 1.)
 				{
-					alpha = OPAQUE;
+					Alpha = 1.;
 					visdir = 0;
 				}
 			}
 			else if (visdir < 0)
 			{
-				alpha -= 3*FRACUNIT/TICRATE/2;
-				if (alpha < 0)
+				Alpha -= 1.5/TICRATE;
+				if (Alpha < 0)
 				{
-					alpha = 0;
+					Alpha = 0;
 					visdir = 0;
 				}
 			}
@@ -3748,7 +3745,7 @@ void AActor::Tick ()
 						const sector_t *sec = node->m_sector;
 						if (sec->floorplane.c >= STEEPSLOPE)
 						{
-							if (floorplane.ZatPoint (PosRelative(node->m_sector)) >= _f_Z() - MaxStepHeight)
+							if (floorplane.ZatPoint (PosRelative(node->m_sector)) >= _f_Z() - _f_MaxStepHeight())
 							{
 								dopush = false;
 								break;
@@ -3813,12 +3810,12 @@ void AActor::Tick ()
 							PlayerLandedOnThing (this, onmo);
 						}
 					}
-					if (onmo->_f_Top() - _f_Z() <= MaxStepHeight)
+					if (onmo->Top() - Z() <= MaxStepHeight)
 					{
 						if (player && player->mo == this)
 						{
 							player->viewheight -= onmo->_f_Top() - _f_Z();
-							fixed_t deltaview = player->GetDeltaViewHeight();
+							double deltaview = player->GetDeltaViewHeight();
 							if (deltaview > player->deltaviewheight)
 							{
 								player->deltaviewheight = deltaview;
@@ -4380,7 +4377,7 @@ void AActor::HandleSpawnFlags ()
 	{
 		flags |= MF_SHADOW;
 		RenderStyle = STYLE_Translucent;
-		alpha = TRANSLUC25;
+		Alpha = 0.25;
 	}
 	else if (SpawnFlags & MTF_ALTSHADOW)
 	{
@@ -4637,8 +4634,8 @@ APlayerPawn *P_SpawnPlayer (FPlayerStart *mthing, int playernum, int flags)
 	}
 	else
 	{
-		spawn_x = mthing->x;
-		spawn_y = mthing->y;
+		spawn_x = mthing->_f_X();
+		spawn_y = mthing->_f_Y();
 
 		// Allow full angular precision
 		SpawnAngle = (double)mthing->angle;
@@ -4661,9 +4658,9 @@ APlayerPawn *P_SpawnPlayer (FPlayerStart *mthing, int playernum, int flags)
 	if (level.flags & LEVEL_USEPLAYERSTARTZ)
 	{
 		if (spawn_z == ONFLOORZ)
-			mobj->_f_AddZ(mthing->z);
+			mobj->AddZ(mthing->pos.Z);
 		else if (spawn_z == ONCEILINGZ)
-			mobj->_f_AddZ(-mthing->z);
+			mobj->AddZ(-mthing->pos.Z);
 		P_FindFloorCeiling(mobj, FFCF_SAMESECTOR | FFCF_ONLY3DFLOORS | FFCF_3DRESTRICT);
 	}
 
@@ -4783,8 +4780,7 @@ APlayerPawn *P_SpawnPlayer (FPlayerStart *mthing, int playernum, int flags)
 
 	if (multiplayer)
 	{
-		unsigned an = mobj->_f_angle() >> ANGLETOFINESHIFT;
-		Spawn ("TeleportFog", mobj->Vec3Offset(20*finecosine[an], 20*finesine[an], TELEFOGHEIGHT), ALLOW_REPLACE);
+		Spawn ("TeleportFog", mobj->Vec3Angle(20, mobj->Angles.Yaw, TELEFOGHEIGHT), ALLOW_REPLACE);
 	}
 
 	// "Fix" for one of the starts on exec.wad MAP01: If you start inside the ceiling,
@@ -5174,8 +5170,8 @@ AActor *P_SpawnMapThing (FMapThing *mthing, int position)
 	}
 
 	// Set various UDMF options
-	if (mthing->alpha != -1)
-		mobj->alpha = mthing->alpha;
+	if (mthing->Alpha >= 0)
+		mobj->Alpha = mthing->Alpha;
 	if (mthing->RenderStyle != STYLE_Count)
 		mobj->RenderStyle = (ERenderStyle)mthing->RenderStyle;
 	if (mthing->Scale.X != 0)
@@ -6139,7 +6135,7 @@ AActor *P_SpawnPlayerMissile (AActor *source, PClassActor *type, DAngle angle)
 	return P_SpawnPlayerMissile (source, 0, 0, 0, type, angle);
 }
 
-AActor *P_SpawnPlayerMissile (AActor *source, fixed_t x, fixed_t y, fixed_t z,
+AActor *P_SpawnPlayerMissile (AActor *source, double x, double y, double z,
 							  PClassActor *type, DAngle angle, FTranslatedLineTarget *pLineTarget, AActor **pMissileActor,
 							  bool nofreeaim, bool noautoaim, int aimflags)
 {
@@ -6198,23 +6194,23 @@ AActor *P_SpawnPlayerMissile (AActor *source, fixed_t x, fixed_t y, fixed_t z,
 	if (z != ONFLOORZ && z != ONCEILINGZ)
 	{
 		// Doom spawns missiles 4 units lower than hitscan attacks for players.
-		z += source->_f_Z() + (source->_f_height()>>1) - source->_f_floorclip();
+		z += source->Center() - source->Floorclip;
 		if (source->player != NULL)	// Considering this is for player missiles, it better not be NULL.
 		{
-			z += fixed_t ((source->player->mo->AttackZOffset - 4*FRACUNIT) * source->player->crouchfactor);
+			z += ((FIXED2DBL(source->player->mo->AttackZOffset) - 4) * source->player->crouchfactor);
 		}
 		else
 		{
-			z += 4*FRACUNIT;
+			z += 4;
 		}
 		// Do not fire beneath the floor.
-		if (z < source->_f_floorz())
+		if (z < source->floorz)
 		{
-			z = source->_f_floorz();
+			z = source->floorz;
 		}
 	}
-	fixedvec2 pos = source->Vec2Offset(x, y);
-	AActor *MissileActor = Spawn (type, pos.x, pos.y, z, ALLOW_REPLACE);
+	DVector3 pos = source->Vec2OffsetZ(x, y, z);
+	AActor *MissileActor = Spawn (type, pos, ALLOW_REPLACE);
 	if (pMissileActor) *pMissileActor = MissileActor;
 	P_PlaySpawnSound(MissileActor, source);
 	MissileActor->target = source;
@@ -6634,6 +6630,17 @@ void AActor::ClearCounters()
 }
 
 
+int AActor::ApplyDamageFactor(FName damagetype, int damage) const
+{
+	damage = int(damage * DamageFactor);
+	if (damage > 0)
+	{
+		damage = DamageTypeDefinition::ApplyMobjDamageFactor(damage, damagetype, GetClass()->DamageFactors);
+	}
+	return damage;
+}
+
+
 //----------------------------------------------------------------------------
 //
 // DropItem handling
@@ -6691,7 +6698,7 @@ void PrintMiscActorInfo(AActor *query)
 			if (query->BounceFlags & 1<<flagi) Printf(" %s", flagnamesb[flagi]);*/
 		Printf("\nRender style = %i:%s, alpha %f\nRender flags: %x", 
 			querystyle, (querystyle < STYLE_Count ? renderstyles[querystyle] : "Unknown"),
-			FIXED2DBL(query->alpha), query->renderflags.GetValue());
+			query->Alpha, query->renderflags.GetValue());
 		/*for (flagi = 0; flagi < 31; flagi++)
 			if (query->renderflags & 1<<flagi) Printf(" %s", flagnamesr[flagi]);*/
 		Printf("\nSpecial+args: %s(%i, %i, %i, %i, %i)\nspecial1: %i, special2: %i.",
diff --git a/src/p_setup.cpp b/src/p_setup.cpp
index eeab02133..45b490bf7 100644
--- a/src/p_setup.cpp
+++ b/src/p_setup.cpp
@@ -1527,8 +1527,8 @@ void P_LoadSectors (MapData *map, FMissingTextureTracker &missingtex)
 		ss->nextsec = -1;	//jff 2/26/98 add fields to support locking out
 		ss->prevsec = -1;	// stair retriggering until build completes
 
-		ss->SetAlpha(sector_t::floor, FRACUNIT);
-		ss->SetAlpha(sector_t::ceiling, FRACUNIT);
+		ss->SetAlpha(sector_t::floor, OPAQUE);
+		ss->SetAlpha(sector_t::ceiling, OPAQUE);
 		ss->SetXScale(sector_t::floor, FRACUNIT);	// [RH] floor and ceiling scaling
 		ss->SetYScale(sector_t::floor, FRACUNIT);
 		ss->SetXScale(sector_t::ceiling, FRACUNIT);
@@ -1760,7 +1760,7 @@ void P_LoadThings (MapData * map)
 		mti[i].SkillFilter = MakeSkill(flags);
 		mti[i].ClassFilter = 0xffff;	// Doom map format doesn't have class flags so spawn for all player classes
 		mti[i].RenderStyle = STYLE_Count;
-		mti[i].alpha = -1;
+		mti[i].Alpha = -1;
 		mti[i].health = 1;
 		mti[i].FloatbobPhase = -1;
 
@@ -1856,7 +1856,7 @@ void P_LoadThings2 (MapData * map)
 
 		mti[i].Gravity = 1;
 		mti[i].RenderStyle = STYLE_Count;
-		mti[i].alpha = -1;
+		mti[i].Alpha = -1;
 		mti[i].health = 1;
 		mti[i].FloatbobPhase = -1;
 	}
@@ -2055,7 +2055,7 @@ void P_FinishLoadingLineDef(line_t *ld, int alpha)
 			additive = true;
 		}
 
-		alpha = Scale(alpha, FRACUNIT, 255); 
+		alpha = Scale(alpha, OPAQUE, 255); 
 		if (!ld->args[0])
 		{
 			ld->Alpha = alpha;
@@ -2172,7 +2172,7 @@ void P_LoadLineDefs (MapData * map)
 	ld = lines;
 	for (i = 0; i < numlines; i++, mld++, ld++)
 	{
-		ld->Alpha = FRACUNIT;	// [RH] Opaque by default
+		ld->Alpha = OPAQUE;	// [RH] Opaque by default
 		ld->portalindex = UINT_MAX;
 
 		// [RH] Translate old linedef special and flags to be
@@ -2276,7 +2276,7 @@ void P_LoadLineDefs2 (MapData * map)
 
 		ld->v1 = &vertexes[LittleShort(mld->v1)];
 		ld->v2 = &vertexes[LittleShort(mld->v2)];
-		ld->Alpha = FRACUNIT;	// [RH] Opaque by default
+		ld->Alpha = OPAQUE;	// [RH] Opaque by default
 
 		P_SetSideNum (&ld->sidedef[0], LittleShort(mld->sidenum[0]));
 		P_SetSideNum (&ld->sidedef[1], LittleShort(mld->sidenum[1]));
diff --git a/src/p_sight.cpp b/src/p_sight.cpp
index dfe510f85..d9652cb01 100644
--- a/src/p_sight.cpp
+++ b/src/p_sight.cpp
@@ -95,7 +95,7 @@ class SightCheck
 	sector_t * lastsector;			// last sector being entered by trace
 	fixed_t topslope, bottomslope;	// slopes to top and bottom of target
 	int Flags;
-	divline_t trace;
+	fdivline_t trace;
 	int portaldir;
 	int portalgroup;
 	bool portalfound;
@@ -372,7 +372,7 @@ bool SightCheck::PTR_SightTraverse (intercept_t *in)
 
 bool SightCheck::P_SightCheckLine (line_t *ld)
 {
-	divline_t dl;
+	fdivline_t dl;
 
 	if (ld->validcount == validcount)
 	{
@@ -508,7 +508,7 @@ bool SightCheck::P_SightTraverseIntercepts ()
 	fixed_t dist;
 	intercept_t *scan, *in;
 	unsigned scanpos;
-	divline_t dl;
+	fdivline_t dl;
 
 	count = intercepts.Size ();
 //
@@ -849,7 +849,7 @@ sightcounts[0]++;
 //
 	// [RH] Andy Baker's stealth monsters:
 	// Cannot see an invisible object
-	if ((flags & SF_IGNOREVISIBILITY) == 0 && ((t2->renderflags & RF_INVISIBLE) || !t2->RenderStyle.IsVisible(t2->alpha)))
+	if ((flags & SF_IGNOREVISIBILITY) == 0 && ((t2->renderflags & RF_INVISIBLE) || !t2->RenderStyle.IsVisible(t2->Alpha)))
 	{ // small chance of an attack being made anyway
 		if ((bglobal.m_Thinking ? pr_botchecksight() : pr_checksight()) > 50)
 		{
diff --git a/src/p_spec.h b/src/p_spec.h
index 7fe978476..1148dfa6b 100644
--- a/src/p_spec.h
+++ b/src/p_spec.h
@@ -801,6 +801,11 @@ bool EV_BuildStairs (int tag, DFloor::EStair type, line_t *line,
 	int usespecials);
 bool EV_DoFloor (DFloor::EFloor floortype, line_t *line, int tag,
 	fixed_t speed, fixed_t height, int crush, int change, bool hexencrush, bool hereticlower=false);
+inline bool EV_DoFloor(DFloor::EFloor floortype, line_t *line, int tag,
+	double speed, double height, int crush, int change, bool hexencrush, bool hereticlower = false)
+{
+	return EV_DoFloor(floortype, line, tag, FLOAT2FIXED(speed), FLOAT2FIXED(height), crush, change, hexencrush, hereticlower);
+}
 bool EV_FloorCrushStop (int tag);
 bool EV_DoDonut (int tag, line_t *line, fixed_t pillarspeed, fixed_t slimespeed);
 
@@ -928,7 +933,15 @@ inline void P_SpawnTeleportFog(AActor *mobj, const DVector3 &pos, bool beforeTel
 {
 	P_SpawnTeleportFog(mobj, FLOAT2FIXED(pos.X), FLOAT2FIXED(pos.Y), FLOAT2FIXED(pos.Z), beforeTele, setTarget);
 }
+inline void P_SpawnTeleportFog(AActor *mobj, double x, double y, double z, bool beforeTele = true, bool setTarget = false)
+{
+	P_SpawnTeleportFog(mobj, FLOAT2FIXED(x), FLOAT2FIXED(y), FLOAT2FIXED(z), beforeTele, setTarget);
+}
 bool P_Teleport (AActor *thing, fixed_t x, fixed_t y, fixed_t z, DAngle angle, int flags); // bool useFog, bool sourceFog, bool keepOrientation, bool haltVelocity = true, bool keepHeight = false
+inline bool P_Teleport(AActor *thing, const DVector3 &pos, DAngle angle, int flags)
+{
+	return P_Teleport(thing, FLOAT2FIXED(pos.X), FLOAT2FIXED(pos.Y), FLOAT2FIXED(pos.Z), angle, flags);
+}
 bool EV_Teleport (int tid, int tag, line_t *line, int side, AActor *thing, int flags);
 bool EV_SilentLineTeleport (line_t *line, int side, AActor *thing, int id, INTBOOL reverse);
 bool EV_TeleportOther (int other_tid, int dest_tid, bool fog);
diff --git a/src/p_switch.cpp b/src/p_switch.cpp
index 7871b8aaa..2c0c8c2f6 100644
--- a/src/p_switch.cpp
+++ b/src/p_switch.cpp
@@ -135,7 +135,7 @@ bool P_CheckSwitchRange(AActor *user, line_t *line, int sideno, fixedvec3 *optpo
 		return true;
 
 	// calculate the point where the user would touch the wall.
-	divline_t dll, dlu;
+	fdivline_t dll, dlu;
 	fixed_t inter, checkx, checky;
 
 	P_MakeDivline (line, &dll);
diff --git a/src/p_teleport.cpp b/src/p_teleport.cpp
index 61eb73dc7..1441ae39b 100644
--- a/src/p_teleport.cpp
+++ b/src/p_teleport.cpp
@@ -191,10 +191,10 @@ bool P_Teleport (AActor *thing, fixed_t x, fixed_t y, fixed_t z, DAngle angle, i
 	{
 		if (!predicting)
 		{
-			fixed_t fogDelta = thing->flags & MF_MISSILE ? 0 : TELEFOGHEIGHT;
-			fixedvec2 vector = Vec2Angle(20 * FRACUNIT, angle);
-			fixedvec2 fogpos = P_GetOffsetPosition(x, y, vector.x, vector.y);
-			P_SpawnTeleportFog(thing, fogpos.x, fogpos.y, thing->_f_Z() + fogDelta, false, true);
+			double fogDelta = thing->flags & MF_MISSILE ? 0 : TELEFOGHEIGHT;
+			DVector2 vector = angle.ToVector(20);
+			DVector2 fogpos = P_GetOffsetPosition(FIXED2DBL(x), FIXED2DBL(y), vector.X, vector.Y);
+			P_SpawnTeleportFog(thing, fogpos.X, fogpos.Y, thing->Z() + fogDelta, false, true);
 
 		}
 		if (thing->player)
@@ -560,7 +560,7 @@ bool EV_SilentLineTeleport (line_t *line, int side, AActor *thing, int id, INTBO
 				player->Vel.Y = p.Y*c + p.X*s;
 
 				// Save the current deltaviewheight, used in stepping
-				fixed_t deltaviewheight = player->deltaviewheight;
+				double deltaviewheight = player->deltaviewheight;
 
 				// Clear deltaviewheight, since we don't want any changes now
 				player->deltaviewheight = 0;
diff --git a/src/p_things.cpp b/src/p_things.cpp
index 35560af6c..032ae9075 100644
--- a/src/p_things.cpp
+++ b/src/p_things.cpp
@@ -86,7 +86,7 @@ bool P_Thing_Spawn (int tid, AActor *source, int type, DAngle angle, bool fog, i
 	}
 	while (spot != NULL)
 	{
-		mobj = Spawn (kind, spot->_f_Pos(), ALLOW_REPLACE);
+		mobj = Spawn (kind, spot->Pos(), ALLOW_REPLACE);
 
 		if (mobj != NULL)
 		{
@@ -98,7 +98,7 @@ bool P_Thing_Spawn (int tid, AActor *source, int type, DAngle angle, bool fog, i
 				mobj->Angles.Yaw = (angle != 1000000. ? angle : spot->Angles.Yaw);
 				if (fog)
 				{
-					P_SpawnTeleportFog(mobj, spot->_f_X(), spot->_f_Y(), spot->_f_Z() + TELEFOGHEIGHT, false, true);
+					P_SpawnTeleportFog(mobj, spot->PosPlusZ(TELEFOGHEIGHT), false, true);
 				}
 				if (mobj->flags & MF_SPECIAL)
 					mobj->flags |= MF_DROPPED;	// Don't respawn
diff --git a/src/p_udmf.cpp b/src/p_udmf.cpp
index 49b4779eb..89b5b9737 100644
--- a/src/p_udmf.cpp
+++ b/src/p_udmf.cpp
@@ -473,7 +473,7 @@ public:
 		memset(th, 0, sizeof(*th));
 		th->Gravity = 1;
 		th->RenderStyle = STYLE_Count;
-		th->alpha = -1;
+		th->Alpha = -1;
 		th->health = 1;
 		th->FloatbobPhase = -1;
 		sc.MustGetToken('{');
@@ -694,7 +694,7 @@ public:
 				break;
 
 			case NAME_Alpha:
-				th->alpha = CheckFixed(key);
+				th->Alpha = CheckFloat(key);
 				break;
 
 			case NAME_FillColor:
@@ -790,7 +790,7 @@ public:
 		FString tagstring;
 
 		memset(ld, 0, sizeof(*ld));
-		ld->Alpha = FRACUNIT;
+		ld->Alpha = OPAQUE;
 		ld->portalindex = UINT_MAX;
 		ld->sidedef[0] = ld->sidedef[1] = NULL;
 		if (level.flags2 & LEVEL2_CLIPMIDTEX) ld->flags |= ML_CLIP_MIDTEX;
@@ -1092,13 +1092,13 @@ public:
 		{
 			ld->activation = (ld->activation & ~SPAC_Use) | SPAC_UseThrough;
 		}
-		if (strifetrans && ld->Alpha == FRACUNIT)
+		if (strifetrans && ld->Alpha == OPAQUE)
 		{
-			ld->Alpha = FRACUNIT * 3/4;
+			ld->Alpha = TRANSLUC75;
 		}
 		if (strifetrans2 && ld->Alpha == FRACUNIT)
 		{
-			ld->Alpha = FRACUNIT * 1/4;
+			ld->Alpha = TRANSLUC25;
 		}
 		if (ld->sidedef[0] == NULL)
 		{
@@ -1292,8 +1292,8 @@ public:
 		sec->SetYScale(sector_t::floor, FRACUNIT);
 		sec->SetXScale(sector_t::ceiling, FRACUNIT);
 		sec->SetYScale(sector_t::ceiling, FRACUNIT);
-		sec->SetAlpha(sector_t::floor, FRACUNIT);
-		sec->SetAlpha(sector_t::ceiling, FRACUNIT);
+		sec->SetAlpha(sector_t::floor, OPAQUE);
+		sec->SetAlpha(sector_t::ceiling, OPAQUE);
 		sec->thinglist = NULL;
 		sec->touching_thinglist = NULL;		// phares 3/14/98
 		sec->seqType = (level.flags & LEVEL_SNDSEQTOTALCTRL) ? 0 : -1;
diff --git a/src/p_user.cpp b/src/p_user.cpp
index 840d10c94..2409a7475 100644
--- a/src/p_user.cpp
+++ b/src/p_user.cpp
@@ -1053,7 +1053,7 @@ void APlayerPawn::GiveDeathmatchInventory()
 			AKey *key = (AKey *)GetDefaultByType (PClassActor::AllActorClasses[i]);
 			if (key->KeyNumber != 0)
 			{
-				key = static_cast<AKey *>(Spawn(static_cast<PClassActor *>(PClassActor::AllActorClasses[i]), 0,0,0, NO_REPLACE));
+				key = static_cast<AKey *>(Spawn(static_cast<PClassActor *>(PClassActor::AllActorClasses[i])));
 				if (!key->CallTryPickup (this))
 				{
 					key->Destroy ();
@@ -1327,7 +1327,7 @@ void APlayerPawn::GiveDefaultInventory ()
 	// BasicArmor must come right after that. It should not affect any
 	// other protection item as well but needs to process the damage
 	// before the HexenArmor does.
-	ABasicArmor *barmor = Spawn<ABasicArmor> (0,0,0, NO_REPLACE);
+	ABasicArmor *barmor = Spawn<ABasicArmor> ();
 	barmor->BecomeItem ();
 	barmor->SavePercent = 0;
 	barmor->Amount = 0;
@@ -1350,7 +1350,7 @@ void APlayerPawn::GiveDefaultInventory ()
 			}
 			else
 			{
-				item = static_cast<AInventory *>(Spawn (ti, 0,0,0, NO_REPLACE));
+				item = static_cast<AInventory *>(Spawn (ti));
 				item->ItemFlags |= IF_IGNORESKILL;	// no skill multiplicators here
 				item->Amount = di->Amount;
 				if (item->IsKindOf (RUNTIME_CLASS (AWeapon)))
@@ -1879,7 +1879,7 @@ void P_CalcHeight (player_t *player)
 	// move viewheight
 	if (player->playerstate == PST_LIVE)
 	{
-		player->viewheight += player->deltaviewheight;
+		player->viewheight += FLOAT2FIXED(player->deltaviewheight);
 
 		if (player->viewheight > defaultviewheight)
 		{
@@ -1890,14 +1890,14 @@ void P_CalcHeight (player_t *player)
 		{
 			player->viewheight = defaultviewheight>>1;
 			if (player->deltaviewheight <= 0)
-				player->deltaviewheight = 1;
+				player->deltaviewheight = 1 / 65536.;
 		}
 		
 		if (player->deltaviewheight)	
 		{
-			player->deltaviewheight += FRACUNIT/4;
+			player->deltaviewheight += 0.25;
 			if (!player->deltaviewheight)
-				player->deltaviewheight = 1;
+				player->deltaviewheight = 1/65536.;
 		}
 	}
 
@@ -2430,7 +2430,7 @@ void P_PlayerThink (player_t *player)
 		player->Uncrouch();
 	}
 
-	player->crouchoffset = -fixed_t(player->mo->ViewHeight * (1 - player->crouchfactor));
+	player->crouchoffset = -(FIXED2DBL(player->mo->ViewHeight) * (1 - player->crouchfactor));
 
 	// MUSINFO stuff
 	if (player->MUSINFOtics >= 0 && player->MUSINFOactor != NULL)
diff --git a/src/p_xlat.cpp b/src/p_xlat.cpp
index ea6bd7d9e..2e30925bb 100644
--- a/src/p_xlat.cpp
+++ b/src/p_xlat.cpp
@@ -87,10 +87,10 @@ void P_TranslateLineDef (line_t *ld, maplinedef_t *mld, int lineindexforid)
 				passthrough = true;
 				break;
 			case -2:
-				ld->Alpha = FRACUNIT*3/4;
+				ld->Alpha = TRANSLUC75;
 				break;
 			case -3:
-				ld->Alpha = FRACUNIT / 4;
+				ld->Alpha = TRANSLUC25;
 				break;
 			default:
 				newflags |= LineFlagTranslations[i].newvalue;
diff --git a/src/portal.cpp b/src/portal.cpp
index ef6013f51..af0f96b33 100644
--- a/src/portal.cpp
+++ b/src/portal.cpp
@@ -162,7 +162,7 @@ void FLinePortalTraverse::AddLineIntercepts(int bx, int by)
 	{
 		line_t *ld = block.portallines[i];
 		fixed_t frac;
-		divline_t dl;
+		fdivline_t dl;
 
 		if (ld->validcount == validcount) continue;	// already processed
 
diff --git a/src/portal.h b/src/portal.h
index 4fe89a3c6..582695f06 100644
--- a/src/portal.h
+++ b/src/portal.h
@@ -217,4 +217,11 @@ void P_NormalizeVXVY(fixed_t& vx, fixed_t& vy);
 fixed_t P_PointLineDistance(line_t* line, fixed_t x, fixed_t y);
 fixedvec2 P_GetOffsetPosition(fixed_t x, fixed_t y, fixed_t dx, fixed_t dy);
 
+inline DVector2 P_GetOffsetPosition(double x, double y, double dx, double dy)
+{
+	fixedvec2 v = P_GetOffsetPosition(FLOAT2FIXED(x), FLOAT2FIXED(y), FLOAT2FIXED(dx), FLOAT2FIXED(dy));
+	return{ FIXED2DBL(v.x), FIXED2DBL(v.y) };
+}
+
+
 #endif
\ No newline at end of file
diff --git a/src/r_bsp.cpp b/src/r_bsp.cpp
index 5351c722e..da963e6dd 100644
--- a/src/r_bsp.cpp
+++ b/src/r_bsp.cpp
@@ -1177,7 +1177,7 @@ void R_Subsector (subsector_t *sub)
 			if (!(fakeFloor->flags & FF_RENDERPLANES)) continue;
 			if (fakeFloor->alpha == 0) continue;
 			if (fakeFloor->flags & FF_THISINSIDE && fakeFloor->flags & FF_INVERTSECTOR) continue;
-			fakeAlpha = MIN(Scale(fakeFloor->alpha, OPAQUE, 255), OPAQUE);
+			fakeAlpha = MIN<fixed_t>(Scale(fakeFloor->alpha, OPAQUE, 255), OPAQUE);
 			if (fakeFloor->validcount != validcount)
 			{
 				fakeFloor->validcount = validcount;
@@ -1238,7 +1238,7 @@ void R_Subsector (subsector_t *sub)
 			if (!(fakeFloor->flags & FF_RENDERPLANES)) continue;
 			if (fakeFloor->alpha == 0) continue;
 			if (!(fakeFloor->flags & FF_THISINSIDE) && (fakeFloor->flags & (FF_SWIMMABLE|FF_INVERTSECTOR)) == (FF_SWIMMABLE|FF_INVERTSECTOR)) continue;
-			fakeAlpha = MIN(Scale(fakeFloor->alpha, OPAQUE, 255), OPAQUE);
+			fakeAlpha = MIN<fixed_t>(Scale(fakeFloor->alpha, OPAQUE, 255), OPAQUE);
 
 			if (fakeFloor->validcount != validcount)
 			{
diff --git a/src/r_data/renderstyle.cpp b/src/r_data/renderstyle.cpp
index 6372a7afd..5ddb58a27 100644
--- a/src/r_data/renderstyle.cpp
+++ b/src/r_data/renderstyle.cpp
@@ -114,7 +114,7 @@ FArchive &operator<< (FArchive &arc, FRenderStyle &style)
 //
 //==========================================================================
 
-bool FRenderStyle::IsVisible(fixed_t alpha) const throw()
+bool FRenderStyle::IsVisible(double alpha) const throw()
 {
 	if (BlendOp == STYLEOP_None)
 	{
@@ -124,13 +124,13 @@ bool FRenderStyle::IsVisible(fixed_t alpha) const throw()
 	{
 		if (Flags & STYLEF_Alpha1)
 		{
-			alpha = FRACUNIT;
+			alpha = 1.;
 		}
 		else
 		{
-			alpha = clamp(alpha, 0, FRACUNIT);
+			alpha = clamp(alpha, 0., 1.);
 		}
-		return GetAlpha(SrcAlpha, alpha) != 0 || GetAlpha(DestAlpha, alpha) != FRACUNIT;
+		return GetAlpha(SrcAlpha, alpha) != 0 || GetAlpha(DestAlpha, alpha) != OPAQUE;
 	}
 	// Treat anything else as visible.
 	return true;
@@ -192,10 +192,23 @@ fixed_t GetAlpha(int type, fixed_t alpha)
 	switch (type)
 	{
 	case STYLEALPHA_Zero:		return 0;
-	case STYLEALPHA_One:		return FRACUNIT;
+	case STYLEALPHA_One:		return OPAQUE;
 	case STYLEALPHA_Src:		return alpha;
-	case STYLEALPHA_InvSrc:		return FRACUNIT - alpha;
+	case STYLEALPHA_InvSrc:		return OPAQUE - alpha;
 	default:					return 0;
 	}
 }
 
+fixed_t GetAlpha(int type, double alpha)
+{
+	switch (type)
+	{
+	case STYLEALPHA_Zero:		return 0;
+	case STYLEALPHA_One:		return OPAQUE;
+	case STYLEALPHA_Src:		return FLOAT2FIXED(alpha);
+	case STYLEALPHA_InvSrc:		return FLOAT2FIXED(1. - alpha);
+	default:					return 0;
+	}
+}
+
+
diff --git a/src/r_data/renderstyle.h b/src/r_data/renderstyle.h
index 613505821..e453efd6c 100644
--- a/src/r_data/renderstyle.h
+++ b/src/r_data/renderstyle.h
@@ -35,6 +35,20 @@
 **
 */
 
+// <wingdi.h> also #defines OPAQUE
+#ifdef OPAQUE
+#undef OPAQUE
+#endif
+
+enum
+{
+	OPAQUE = 65536,
+	TRANSLUC25 = (OPAQUE / 4),
+	TRANSLUC33 = (OPAQUE / 3),
+	TRANSLUC66 = ((OPAQUE * 2) / 3),
+	TRANSLUC75 = ((OPAQUE * 3) / 4),
+};
+
 // Legacy render styles
 enum ERenderStyle
 {
@@ -127,7 +141,7 @@ union FRenderStyle
 	operator uint32() const { return AsDWORD; }
 	bool operator==(const FRenderStyle &o) const { return AsDWORD == o.AsDWORD; }
 	void CheckFuzz();
-	bool IsVisible(fixed_t alpha) const throw();
+	bool IsVisible(double alpha) const throw();
 private:
 	// Code that compares an actor's render style with a legacy render
 	// style value should be updated. Making these conversion operators
@@ -152,5 +166,6 @@ class FArchive;
 
 FArchive &operator<< (FArchive &arc, FRenderStyle &style);
 fixed_t GetAlpha(int type, fixed_t alpha);
+fixed_t GetAlpha(int type, double alpha);
 
 #endif
diff --git a/src/r_defs.h b/src/r_defs.h
index 7819a0cdd..7340ae4cf 100644
--- a/src/r_defs.h
+++ b/src/r_defs.h
@@ -295,12 +295,22 @@ struct secplane_t
 		return FixedMul (ic, -d - DMulScale16 (a, x, b, y));
 	}
 
+	double _f_ZatPointF(fixed_t x, fixed_t y) const
+	{
+		return FIXED2DBL(FixedMul(ic, -d - DMulScale16(a, x, b, y)));
+	}
+
 	// Returns the value of z at (x,y) as a double
 	double ZatPoint (double x, double y) const
 	{
 		return (d + a*x + b*y) * ic / (-65536.0 * 65536.0);
 	}
 
+	double ZatPoint(const DVector2 &pos) const
+	{
+		return (d + a*pos.X + b*pos.Y) * ic / (-65536.0 * 65536.0);
+	}
+
 	// Returns the value of z at vertex v
 	fixed_t ZatPoint (const vertex_t *v) const
 	{
@@ -1406,6 +1416,11 @@ inline sector_t *P_PointInSector(fixed_t x, fixed_t y)
 	return P_PointInSubsector(x, y)->sector;
 }
 
+inline sector_t *P_PointInSector(const DVector2 &pos)
+{
+	return P_PointInSubsector(FLOAT2FIXED(pos.X), FLOAT2FIXED(pos.Y))->sector;
+}
+
 inline fixedvec3 AActor::PosRelative(int portalgroup) const
 {
 	return __pos + Displacements.getOffset(Sector->PortalGroup, portalgroup);
diff --git a/src/r_draw.cpp b/src/r_draw.cpp
index 7a7fe5a96..2f8f04403 100644
--- a/src/r_draw.cpp
+++ b/src/r_draw.cpp
@@ -2359,13 +2359,13 @@ ESPSResult R_SetPatchStyle (FRenderStyle style, fixed_t alpha, int translation,
 	if (style.BlendOp == STYLEOP_Shadow)
 	{
 		style = LegacyRenderStyles[STYLE_TranslucentStencil];
-		alpha = FRACUNIT*3/10;
+		alpha = TRANSLUC33;
 		color = 0;
 	}
 
 	if (style.Flags & STYLEF_TransSoulsAlpha)
 	{
-		alpha = fixed_t(transsouls * FRACUNIT);
+		alpha = fixed_t(transsouls * OPAQUE);
 	}
 	else if (style.Flags & STYLEF_Alpha1)
 	{
@@ -2373,7 +2373,7 @@ ESPSResult R_SetPatchStyle (FRenderStyle style, fixed_t alpha, int translation,
 	}
 	else
 	{
-		alpha = clamp<fixed_t> (alpha, 0, FRACUNIT);
+		alpha = clamp<fixed_t> (alpha, 0, OPAQUE);
 	}
 
 	dc_translation = NULL;
diff --git a/src/r_plane.cpp b/src/r_plane.cpp
index bbf63333e..7e7e4cd4f 100644
--- a/src/r_plane.cpp
+++ b/src/r_plane.cpp
@@ -625,7 +625,7 @@ visplane_t *R_FindPlane (const secplane_t &height, FTextureID picnum, int lightl
 		if (fake3D & (FAKE3D_FAKEFLOOR|FAKE3D_FAKECEILING)) sky = 0x80000000 | fakeAlpha;
 		else sky = 0;	// not skyflatnum so it can't be a sky
 		skybox = NULL;
-		alpha = FRACUNIT;
+		alpha = OPAQUE;
 	}
 
 	// New visplane algorithm uses hash table -- killough
diff --git a/src/r_segs.cpp b/src/r_segs.cpp
index eca7adc88..8d2c3767b 100644
--- a/src/r_segs.cpp
+++ b/src/r_segs.cpp
@@ -243,7 +243,7 @@ void R_RenderMaskedSegRange (drawseg_t *ds, int x1, int x2)
 	ESPSResult drawmode;
 
 	drawmode = R_SetPatchStyle (LegacyRenderStyles[curline->linedef->flags & ML_ADDTRANS ? STYLE_Add : STYLE_Translucent],
-		MIN(curline->linedef->Alpha, FRACUNIT),	0, 0);
+		MIN<fixed_t>(curline->linedef->Alpha, OPAQUE),	0, 0);
 
 	if ((drawmode == DontDraw && !ds->bFogBoundary && !ds->bFakeBoundary))
 	{
diff --git a/src/r_things.cpp b/src/r_things.cpp
index 5aa00e44c..f0082e6c4 100644
--- a/src/r_things.cpp
+++ b/src/r_things.cpp
@@ -755,7 +755,7 @@ void R_ProjectSprite (AActor *thing, int fakeside, F3DFloor *fakefloor, F3DFloor
 	// Don't waste time projecting sprites that are definitely not visible.
 	if (thing == NULL ||
 		(thing->renderflags & RF_INVISIBLE) ||
-		!thing->RenderStyle.IsVisible(thing->alpha) ||
+		!thing->RenderStyle.IsVisible(thing->Alpha) ||
 		!thing->IsVisibleToPlayer())
 	{
 		return;
@@ -1063,7 +1063,7 @@ void R_ProjectSprite (AActor *thing, int fakeside, F3DFloor *fakefloor, F3DFloor
 	vis->FillColor = thing->fillcolor;
 	vis->Translation = thing->Translation;		// [RH] thing translation table
 	vis->FakeFlatStat = fakeside;
-	vis->Style.alpha = thing->alpha;
+	vis->Style.alpha = FLOAT2FIXED(thing->Alpha);
 	vis->fakefloor = fakefloor;
 	vis->fakeceiling = fakeceiling;
 	vis->ColormapNum = 0;
@@ -1204,7 +1204,7 @@ static void R_ProjectWallSprite(AActor *thing, fixed_t fx, fixed_t fy, fixed_t f
 	vis->FillColor = thing->fillcolor;
 	vis->Translation = thing->Translation;
 	vis->FakeFlatStat = 0;
-	vis->Style.alpha = thing->alpha;
+	vis->Style.alpha = FLOAT2FIXED(thing->Alpha);
 	vis->fakefloor = NULL;
 	vis->fakeceiling = NULL;
 	vis->ColormapNum = 0;
@@ -1388,7 +1388,7 @@ void R_DrawPSprite (pspdef_t* psp, int pspnum, AActor *owner, fixed_t sx, fixed_
 	noaccel = false;
 	if (pspnum <= ps_flash)
 	{
-		vis->Style.alpha = owner->alpha;
+		vis->Style.alpha = FLOAT2FIXED(owner->Alpha);
 		vis->Style.RenderStyle = owner->RenderStyle;
 
 		// The software renderer cannot invert the source without inverting the overlay
diff --git a/src/tables.h b/src/tables.h
index 790deed5f..6fe767a4f 100644
--- a/src/tables.h
+++ b/src/tables.h
@@ -53,7 +53,6 @@
 #define ANGLETOFINESHIFT		19
 
 #define BOBTOFINESHIFT			(FINEANGLEBITS - 6)
-#define BOBTORAD(v)		((v) * (M_PI/32))	// from FloatBobTable to radians.
 
 // Effective size is 10240.
 extern	fixed_t 		finesine[5*FINEANGLES/4];
diff --git a/src/textures/multipatchtexture.cpp b/src/textures/multipatchtexture.cpp
index f33bfa702..5a9b8d491 100644
--- a/src/textures/multipatchtexture.cpp
+++ b/src/textures/multipatchtexture.cpp
@@ -593,7 +593,7 @@ int FMultiPatchTexture::CopyTrueColorPixels(FBitmap *bmp, int x, int y, int rota
 
 		memset (&info, 0, sizeof(info));
 		info.alpha = Parts[i].Alpha;
-		info.invalpha = FRACUNIT - info.alpha;
+		info.invalpha = OPAQUE - info.alpha;
 		info.op = ECopyOp(Parts[i].op);
 		PalEntry b = Parts[i].Blend;
 		if (b.a == 0 && b != BLEND_NONE)
@@ -1165,7 +1165,7 @@ void FMultiPatchTexture::ParsePatch(FScanner &sc, TexPart & part, bool silent, i
 			else if (sc.Compare("alpha"))
 			{
 				sc.MustGetFloat();
-				part.Alpha = clamp(FLOAT2FIXED(sc.Float), 0, FRACUNIT);
+				part.Alpha = clamp<fixed_t>(FLOAT2FIXED(sc.Float), 0, OPAQUE);
 				// bComplex is not set because it is only needed when the style is not OP_COPY.
 			}
 			else if (sc.Compare("style"))
diff --git a/src/thingdef/olddecorations.cpp b/src/thingdef/olddecorations.cpp
index 0a0e93f6f..5fa994262 100644
--- a/src/thingdef/olddecorations.cpp
+++ b/src/thingdef/olddecorations.cpp
@@ -440,7 +440,7 @@ static void ParseInsideDecoration (Baggage &bag, AActor *defaults,
 		else if (sc.Compare ("Alpha"))
 		{
 			sc.MustGetFloat ();
-			defaults->alpha = int(clamp (sc.Float, 0.0, 1.0) * OPAQUE);
+			defaults->Alpha = clamp (sc.Float, 0.0, 1.0);
 		}
 		else if (sc.Compare ("Scale"))
 		{
diff --git a/src/thingdef/thingdef_codeptr.cpp b/src/thingdef/thingdef_codeptr.cpp
index 5ca8bbdb9..9c6cbb8c3 100644
--- a/src/thingdef/thingdef_codeptr.cpp
+++ b/src/thingdef/thingdef_codeptr.cpp
@@ -803,7 +803,7 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_SeekerMissile)
 	{
 		self->tracer = P_RoughMonsterSearch (self, distance, true);
 	}
-	if (!P_SeekerMissile(self, clamp<int>(ang1, 0, 90) * ANGLE_1, clamp<int>(ang2, 0, 90) * ANGLE_1, !!(flags & SMF_PRECISE), !!(flags & SMF_CURSPEED)))
+	if (!P_SeekerMissile(self, clamp<int>(ang1, 0, 90), clamp<int>(ang2, 0, 90), !!(flags & SMF_PRECISE), !!(flags & SMF_CURSPEED)))
 	{
 		if (flags & SMF_LOOK)
 		{ // This monster is no longer seekable, so let us look for another one next time.
@@ -1218,7 +1218,7 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_CustomMissile)
 			angle_t ang = (self->_f_angle() - ANGLE_90) >> ANGLETOFINESHIFT;
 			fixed_t x = spawnofs_xy * finecosine[ang];
 			fixed_t y = spawnofs_xy * finesine[ang];
-			fixed_t z = spawnheight + self->GetBobOffset() - 32*FRACUNIT + (self->player? self->player->crouchoffset : 0);
+			fixed_t z = spawnheight + self->GetBobOffset() - 32*FRACUNIT + (self->player? FLOAT2FIXED(self->player->crouchoffset) : 0);
 
 			fixedvec3 pos = self->_f_Pos();
 			switch (aimmode)
@@ -1622,8 +1622,8 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_FireCustomMissile)
 	PARAM_CLASS		(ti, AActor);
 	PARAM_DANGLE_OPT(angle)			{ angle = 0.; }
 	PARAM_BOOL_OPT	(useammo)		{ useammo = true; }
-	PARAM_INT_OPT	(spawnofs_xy)	{ spawnofs_xy = 0; }
-	PARAM_FIXED_OPT	(spawnheight)	{ spawnheight = 0; }
+	PARAM_FLOAT_OPT	(spawnofs_xy)	{ spawnofs_xy = 0; }
+	PARAM_FLOAT_OPT	(spawnheight)	{ spawnheight = 0; }
 	PARAM_INT_OPT	(flags)			{ flags = 0; }
 	PARAM_DANGLE_OPT(pitch)			{ pitch = 0.; }
 
@@ -1643,10 +1643,8 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_FireCustomMissile)
 
 	if (ti) 
 	{
-		angle_t ang = (self->_f_angle() - ANGLE_90) >> ANGLETOFINESHIFT;
-		fixed_t x = spawnofs_xy * finecosine[ang];
-		fixed_t y = spawnofs_xy * finesine[ang];
-		fixed_t z = spawnheight;
+		DAngle ang = self->Angles.Yaw - 90;
+		DVector3 ofs = self->Vec3Angle(spawnofs_xy, ang, spawnheight);
 		DAngle shootangle = self->Angles.Yaw;
 
 		if (flags & FPF_AIMATANGLE) shootangle += angle;
@@ -1654,7 +1652,7 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_FireCustomMissile)
 		// Temporarily adjusts the pitch
 		DAngle saved_player_pitch = self->Angles.Pitch;
 		self->Angles.Pitch -= pitch;
-		AActor * misl=P_SpawnPlayerMissile (self, x, y, z, ti, shootangle, &t, NULL, false, (flags & FPF_NOAUTOAIM) != 0);
+		AActor * misl=P_SpawnPlayerMissile (self, ofs.X, ofs.Y, ofs.Z, ti, shootangle, &t, NULL, false, (flags & FPF_NOAUTOAIM) != 0);
 		self->Angles.Pitch = saved_player_pitch;
 
 		// automatic handling of seeker missiles
@@ -1758,7 +1756,7 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_CustomPunch)
 				if (armorbonustype != NULL)
 				{
 					assert(armorbonustype->IsDescendantOf(RUNTIME_CLASS(ABasicArmorBonus)));
-					ABasicArmorBonus *armorbonus = static_cast<ABasicArmorBonus *>(Spawn(armorbonustype, 0,0,0, NO_REPLACE));
+					ABasicArmorBonus *armorbonus = static_cast<ABasicArmorBonus *>(Spawn(armorbonustype));
 					armorbonus->SaveAmount *= (actualdamage * lifesteal) >> FRACBITS;
 					armorbonus->MaxSaveAmount = lifestealmax <= 0 ? armorbonus->MaxSaveAmount : lifestealmax;
 					armorbonus->flags |= MF_DROPPED;
@@ -1996,7 +1994,7 @@ static bool DoGiveInventory(AActor *receiver, bool orresult, VM_ARGS)
 	}
 	if (mi) 
 	{
-		AInventory *item = static_cast<AInventory *>(Spawn(mi, 0, 0, 0, NO_REPLACE));
+		AInventory *item = static_cast<AInventory *>(Spawn(mi));
 		if (item == NULL)
 		{
 			return false;
@@ -2334,7 +2332,7 @@ static bool InitSpawnedItem(AActor *self, AActor *mo, int flags)
 	}
 	if (flags & SIXF_TRANSFERALPHA)
 	{
-		mo->alpha = self->alpha;
+		mo->Alpha = self->Alpha;
 	}
 	if (flags & SIXF_TRANSFERRENDERSTYLE)
 	{
@@ -2544,7 +2542,7 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_ThrowGrenade)
 	AActor *bo;
 
 	bo = Spawn(missile, 
-			self->PosPlusZ(-self->_f_floorclip() + self->GetBobOffset() + zheight + 35*FRACUNIT + (self->player? self->player->crouchoffset : 0)),
+			self->PosPlusZ(-self->_f_floorclip() + self->GetBobOffset() + zheight + 35*FRACUNIT + (self->player? FLOAT2FIXED(self->player->crouchoffset) : 0)),
 			ALLOW_REPLACE);
 	if (bo)
 	{
@@ -2739,13 +2737,13 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_LogInt)
 DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_SetTranslucent)
 {
 	PARAM_ACTION_PROLOGUE;
-	PARAM_FIXED		(alpha);
+	PARAM_FLOAT		(alpha);
 	PARAM_INT_OPT	(mode)	{ mode = 0; }
 
 	mode = mode == 0 ? STYLE_Translucent : mode == 2 ? STYLE_Fuzzy : STYLE_Add;
 
 	self->RenderStyle.Flags &= ~STYLEF_Alpha1;
-	self->alpha = clamp<fixed_t>(alpha, 0, FRACUNIT);
+	self->Alpha = clamp(alpha, 0., 1.);
 	self->RenderStyle = ERenderStyle(mode);
 	return 0;
 }
@@ -2767,21 +2765,21 @@ enum FadeFlags
 DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_FadeIn)
 {
 	PARAM_ACTION_PROLOGUE;
-	PARAM_FIXED_OPT(reduce)	{ reduce = FRACUNIT/10; }
+	PARAM_FLOAT_OPT(reduce)	{ reduce = 0.1; }
 	PARAM_INT_OPT(flags)	{ flags = 0; }
 
 	if (reduce == 0)
 	{
-		reduce = FRACUNIT / 10;
+		reduce = 0.1;
 	}
 	self->RenderStyle.Flags &= ~STYLEF_Alpha1;
-	self->alpha += reduce;
+	self->Alpha += reduce;
 
-	if (self->alpha >= FRACUNIT)
+	if (self->Alpha >= 1.)
 	{
 		if (flags & FTF_CLAMP)
 		{
-			self->alpha = FRACUNIT;
+			self->Alpha = 1.;
 		}
 		if (flags & FTF_REMOVE)
 		{
@@ -2801,20 +2799,20 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_FadeIn)
 DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_FadeOut)
 {
 	PARAM_ACTION_PROLOGUE;
-	PARAM_FIXED_OPT(reduce)	{ reduce = FRACUNIT/10; }
+	PARAM_FLOAT_OPT(reduce)	{ reduce = 0.1; }
 	PARAM_INT_OPT(flags)	{ flags = FTF_REMOVE; }
 
 	if (reduce == 0)
 	{
-		reduce = FRACUNIT/10;
+		reduce = 0.1;
 	}
 	self->RenderStyle.Flags &= ~STYLEF_Alpha1;
-	self->alpha -= reduce;
-	if (self->alpha <= 0)
+	self->Alpha -= reduce;
+	if (self->Alpha <= 0)
 	{
 		if (flags & FTF_CLAMP)
 		{
-			self->alpha = 0;
+			self->Alpha = 0;
 		}
 		if (flags & FTF_REMOVE)
 		{
@@ -2835,35 +2833,35 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_FadeOut)
 DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_FadeTo)
 {
 	PARAM_ACTION_PROLOGUE;
-	PARAM_FIXED		(target);
-	PARAM_FIXED_OPT	(amount)		{ amount = fixed_t(0.1*FRACUNIT); }
+	PARAM_FLOAT		(target);
+	PARAM_FLOAT_OPT	(amount)		{ amount = 0.1; }
 	PARAM_INT_OPT	(flags)			{ flags = 0; }
 
 	self->RenderStyle.Flags &= ~STYLEF_Alpha1;
 
-	if (self->alpha > target)
+	if (self->Alpha > target)
 	{
-		self->alpha -= amount;
+		self->Alpha -= amount;
 
-		if (self->alpha < target)
+		if (self->Alpha < target)
 		{
-			self->alpha = target;
+			self->Alpha = target;
 		}
 	}
-	else if (self->alpha < target)
+	else if (self->Alpha < target)
 	{
-		self->alpha += amount;
+		self->Alpha += amount;
 
-		if (self->alpha > target)
+		if (self->Alpha > target)
 		{
-			self->alpha = target;
+			self->Alpha = target;
 		}
 	}
 	if (flags & FTF_CLAMP)
 	{
-		self->alpha = clamp(self->alpha, 0, FRACUNIT);
+		self->Alpha = clamp(self->Alpha, 0., 1.);
 	}
-	if (self->alpha == target && (flags & FTF_REMOVE))
+	if (self->Alpha == target && (flags & FTF_REMOVE))
 	{
 		P_RemoveThing(self);
 	}
@@ -3334,7 +3332,7 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_Burst)
 			mo->Vel.X = pr_burst.Random2() / 128.;
 			mo->Vel.Y = pr_burst.Random2() / 128.;
 			mo->RenderStyle = self->RenderStyle;
-			mo->alpha = self->alpha;
+			mo->Alpha = self->Alpha;
 			mo->CopyFriendliness(self, true);
 		}
 	}
@@ -4936,47 +4934,44 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_QuakeEx)
 //
 //===========================================================================
 
-void A_Weave(AActor *self, int xyspeed, int zspeed, fixed_t xydist, fixed_t zdist)
+void A_Weave(AActor *self, int xyspeed, int zspeed, double xydist, double zdist)
 {
-	fixed_t newX, newY;
+	DVector2 newpos;
 	int weaveXY, weaveZ;
-	int angle;
-	fixed_t dist;
+	DAngle angle;
+	double dist;
 
 	weaveXY = self->WeaveIndexXY & 63;
 	weaveZ = self->WeaveIndexZ & 63;
-	angle = (self->_f_angle() + ANG90) >> ANGLETOFINESHIFT;
+	angle = self->Angles.Yaw + 90;
 
 	if (xydist != 0 && xyspeed != 0)
 	{
-		dist = MulScale13(finesine[weaveXY << BOBTOFINESHIFT], xydist);
-		newX = self->_f_X() - FixedMul (finecosine[angle], dist);
-		newY = self->_f_Y() - FixedMul (finesine[angle], dist);
+		dist = BobSin(weaveXY) * xydist;
+		newpos = self->Pos().XY() - angle.ToVector(dist);
 		weaveXY = (weaveXY + xyspeed) & 63;
-		dist = MulScale13(finesine[weaveXY << BOBTOFINESHIFT], xydist);
-		newX += FixedMul (finecosine[angle], dist);
-		newY += FixedMul (finesine[angle], dist);
+		dist = BobSin(weaveXY) * xydist;
+		newpos += angle.ToVector(dist);
 		if (!(self->flags5 & MF5_NOINTERACTION))
 		{
-			P_TryMove (self, newX, newY, true);
+			P_TryMove (self, newpos, true);
 		}
 		else
 		{
 			self->UnlinkFromWorld ();
 			self->flags |= MF_NOBLOCKMAP;
 			// We need to do portal offsetting here explicitly, because SetXY cannot do that.
-			newX -= self->_f_X();
-			newY -= self->_f_Y();
-			self->SetXY(self->Vec2Offset(newX, newY));
+			newpos -= self->Pos().XY();
+			self->SetXY(self->Vec2Offset(newpos.X, newpos.Y));
 			self->LinkToWorld ();
 		}
 		self->WeaveIndexXY = weaveXY;
 	}
 	if (zdist != 0 && zspeed != 0)
 	{
-		self->_f_AddZ(-MulScale13(finesine[weaveZ << BOBTOFINESHIFT], zdist));
+		self->AddZ(-BobSin(weaveZ) * zdist);
 		weaveZ = (weaveZ + zspeed) & 63;
-		self->_f_AddZ(MulScale13(finesine[weaveZ << BOBTOFINESHIFT], zdist));
+		self->AddZ(BobSin(weaveZ) * zdist);
 		self->WeaveIndexZ = weaveZ;
 	}
 }
@@ -4986,8 +4981,8 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_Weave)
 	PARAM_ACTION_PROLOGUE;
 	PARAM_INT	(xspeed);
 	PARAM_INT	(yspeed);
-	PARAM_FIXED	(xdist);
-	PARAM_FIXED	(ydist);
+	PARAM_FLOAT	(xdist);
+	PARAM_FLOAT	(ydist);
 	A_Weave(self, xspeed, yspeed, xdist, ydist);
 	return 0;
 }
@@ -5463,7 +5458,7 @@ static bool DoRadiusGive(AActor *self, AActor *thing, PClassActor *item, int amo
 
 		if ((flags & RGF_NOSIGHT) || P_CheckSight(thing, self, SF_IGNOREVISIBILITY | SF_IGNOREWATERBOUNDARY))
 		{ // OK to give; target is in direct path, or the monster doesn't care about it being in line of sight.
-			AInventory *gift = static_cast<AInventory *>(Spawn(item, 0, 0, 0, NO_REPLACE));
+			AInventory *gift = static_cast<AInventory *>(Spawn(item));
 			if (gift->IsKindOf(RUNTIME_CLASS(AHealth)))
 			{
 				gift->Amount *= amount;
diff --git a/src/thingdef/thingdef_data.cpp b/src/thingdef/thingdef_data.cpp
index da23b61e3..e9686532d 100644
--- a/src/thingdef/thingdef_data.cpp
+++ b/src/thingdef/thingdef_data.cpp
@@ -619,7 +619,7 @@ void InitThingdef()
 	// Define some member variables we feel like exposing to the user
 	PSymbolTable &symt = RUNTIME_CLASS(AActor)->Symbols;
 	PType *array5 = NewArray(TypeSInt32, 5);
-	symt.AddSymbol(new PField(NAME_Alpha,		TypeFixed,	VARF_Native, myoffsetof(AActor,alpha)));
+	symt.AddSymbol(new PField(NAME_Alpha,		TypeFloat64,	VARF_Native, myoffsetof(AActor,Alpha)));
 	symt.AddSymbol(new PField(NAME_Angle,		TypeFloat64,	VARF_Native, myoffsetof(AActor,Angles.Yaw)));
 	symt.AddSymbol(new PField(NAME_Args,		array5,			VARF_Native, myoffsetof(AActor,args)));
 	symt.AddSymbol(new PField(NAME_CeilingZ,	TypeFloat64,	VARF_Native, myoffsetof(AActor,ceilingz)));
diff --git a/src/thingdef/thingdef_properties.cpp b/src/thingdef/thingdef_properties.cpp
index e8c83fe40..270ac19ce 100644
--- a/src/thingdef/thingdef_properties.cpp
+++ b/src/thingdef/thingdef_properties.cpp
@@ -850,7 +850,7 @@ DEFINE_PROPERTY(renderstyle, S, Actor)
 //==========================================================================
 DEFINE_PROPERTY(defaultalpha, 0, Actor)
 {
-	defaults->alpha = gameinfo.gametype == GAME_Heretic ? HR_SHADOW : HX_SHADOW;
+	defaults->Alpha = gameinfo.gametype == GAME_Heretic ? HR_SHADOW : HX_SHADOW;
 }
 
 //==========================================================================
@@ -858,8 +858,8 @@ DEFINE_PROPERTY(defaultalpha, 0, Actor)
 //==========================================================================
 DEFINE_PROPERTY(alpha, F, Actor)
 {
-	PROP_FIXED_PARM(id, 0);
-	defaults->alpha = id;
+	PROP_DOUBLE_PARM(id, 0);
+	defaults->Alpha = id;
 }
 
 //==========================================================================
@@ -1217,7 +1217,7 @@ DEFINE_PROPERTY(deathtype, S, Actor)
 DEFINE_PROPERTY(damagefactor, ZF, Actor)
 {
 	PROP_STRING_PARM(str, 0);
-	PROP_FIXED_PARM(id, 1);
+	PROP_DOUBLE_PARM(id, 1);
 
 	if (str == NULL)
 	{
@@ -1229,7 +1229,7 @@ DEFINE_PROPERTY(damagefactor, ZF, Actor)
 		if (!stricmp(str, "Normal")) dmgType = NAME_None;
 		else dmgType=str;
 
-		info->SetDamageFactor(dmgType, id);
+		info->SetDamageFactor(dmgType, FLOAT2FIXED(id));
 	}
 }
 
@@ -1247,7 +1247,7 @@ DEFINE_PROPERTY(decal, S, Actor)
 //==========================================================================
 DEFINE_PROPERTY(maxstepheight, F, Actor)
 {
-	PROP_FIXED_PARM(i, 0);
+	PROP_DOUBLE_PARM(i, 0);
 	defaults->MaxStepHeight = i;
 }
 
diff --git a/src/v_draw.cpp b/src/v_draw.cpp
index 1ccf04044..6ae8ae4e5 100644
--- a/src/v_draw.cpp
+++ b/src/v_draw.cpp
@@ -531,7 +531,11 @@ bool DCanvas::ParseDrawTextureTags (FTexture *img, double x, double y, DWORD tag
 			break;
 
 		case DTA_Alpha:
-			parms->alpha = MIN<fixed_t>(FRACUNIT, va_arg (tags, fixed_t));
+			parms->alpha = MIN<fixed_t>(OPAQUE, va_arg (tags, fixed_t));
+			break;
+
+		case DTA_AlphaF:
+			parms->alpha = FLOAT2FIXED(MIN<double>(1., va_arg(tags, double)));
 			break;
 
 		case DTA_AlphaChannel:
@@ -640,7 +644,7 @@ bool DCanvas::ParseDrawTextureTags (FTexture *img, double x, double y, DWORD tag
 			break;
 
 		case DTA_ShadowAlpha:
-			parms->shadowAlpha = MIN<fixed_t>(FRACUNIT, va_arg (tags, fixed_t));
+			parms->shadowAlpha = MIN<fixed_t>(OPAQUE, va_arg (tags, fixed_t));
 			break;
 
 		case DTA_ShadowColor:
@@ -719,7 +723,7 @@ bool DCanvas::ParseDrawTextureTags (FTexture *img, double x, double y, DWORD tag
 			{
 				parms->style = STYLE_Shaded;
 			}
-			else if (parms->alpha < FRACUNIT)
+			else if (parms->alpha < OPAQUE)
 			{
 				parms->style = STYLE_TranslucentStencil;
 			}
@@ -728,7 +732,7 @@ bool DCanvas::ParseDrawTextureTags (FTexture *img, double x, double y, DWORD tag
 				parms->style = STYLE_Stencil;
 			}
 		}
-		else if (parms->alpha < FRACUNIT)
+		else if (parms->alpha < OPAQUE)
 		{
 			parms->style = STYLE_Translucent;
 		}
diff --git a/src/v_video.h b/src/v_video.h
index c94e6ec76..5f137937e 100644
--- a/src/v_video.h
+++ b/src/v_video.h
@@ -75,6 +75,7 @@ enum
 	DTA_DestWidth,		// width of area to draw to
 	DTA_DestHeight,		// height of area to draw to
 	DTA_Alpha,			// alpha value for translucency
+	DTA_AlphaF,			// alpha value for translucency
 	DTA_FillColor,		// color to stencil onto the destination (RGB is the color for truecolor drawers, A is the palette index for paletted drawers)
 	DTA_Translation,	// translation table to recolor the source
 	DTA_AlphaChannel,	// bool: the source is an alpha channel; used with DTA_FillColor
diff --git a/src/vectors.h b/src/vectors.h
index 9eaa375cf..cbc221b1f 100644
--- a/src/vectors.h
+++ b/src/vectors.h
@@ -1076,6 +1076,12 @@ inline TAngle<double> ToDegrees (double rad)
 	return TAngle<double> (double(rad * (180.0 / M_PI)));
 }
 
+// Emulates the old floatbob offset table with direct calls to trig functions.
+inline double BobSin(double fb)
+{
+	return TAngle<double>(double(fb * (180.0 / 32))).Sin() * 8;
+}
+
 template<class T>
 inline TAngle<T> fabs (const TAngle<T> &deg)
 {
@@ -1101,13 +1107,13 @@ inline TAngle<T> deltaangle(double a1, const TAngle<T> &a2)
 }
 
 template<class T>
-inline TAngle<T> diffangle(const TAngle<T> &a1, const TAngle<T> &a2)
+inline TAngle<T> absangle(const TAngle<T> &a1, const TAngle<T> &a2)
 {
 	return fabs((a1 - a2).Normalize180());
 }
 
 template<class T>
-inline TAngle<T> diffangle(const TAngle<T> &a1, double a2)
+inline TAngle<T> absangle(const TAngle<T> &a1, double a2)
 {
 	return fabs((a1 - a2).Normalize180());
 }
diff --git a/wadsrc/static/actors/shared/inventory.txt b/wadsrc/static/actors/shared/inventory.txt
index 98a195f01..0d1ea8b92 100644
--- a/wadsrc/static/actors/shared/inventory.txt
+++ b/wadsrc/static/actors/shared/inventory.txt
@@ -10,7 +10,7 @@ ACTOR Inventory native
 	action native state A_JumpIfNoAmmo(state label);
 	action native A_CustomPunch(int damage, bool norandom = false, int flags = CPF_USEAMMO, class<Actor> pufftype = "BulletPuff", float range = 0, float lifesteal = 0, int lifestealmax = 0, class<BasicArmorBonus> armorbonustype = "ArmorBonus", sound MeleeSound = "", sound MissSound = "");
 	action native A_FireBullets(float/*angle*/ spread_xy, float/*angle*/ spread_z, int numbullets, int damageperbullet, class<Actor> pufftype = "BulletPuff", int flags = 1, float range = 0);
-	action native A_FireCustomMissile(class<Actor> missiletype, float angle = 0, bool useammo = true, int spawnofs_xy = 0, float spawnheight = 0, int flags = 0, float pitch = 0);
+	action native A_FireCustomMissile(class<Actor> missiletype, float angle = 0, bool useammo = true, float spawnofs_xy = 0, float spawnheight = 0, int flags = 0, float pitch = 0);
 	action native A_RailAttack(int damage, int spawnofs_xy = 0, bool useammo = true, color color1 = "", color color2 = "", int flags = 0, float maxdiff = 0, class<Actor> pufftype = "BulletPuff", float/*angle*/ spread_xy = 0, float/*angle*/ spread_z = 0, float range = 0, int duration = 0, float sparsity = 1.0, float driftspeed = 1.0, class<Actor> spawnclass = "none", float spawnofs_z = 0, int spiraloffset = 270);
 	action native A_Light(int extralight);
 	action native A_Light0();