Changed all of the isometric functionality to mapinfo and playerinfo variables. Retained function of most of the CVars.

src/common/rendering/hwrenderer/data/hw_vrmodes.cpp

@@ -146,16 +146,16 @@ float VREyeInfo::getShift() const
 	return vr_swap_eyes ? -res : res;
 }
 
-VSMatrix VREyeInfo::GetProjection(float fov, float aspectRatio, float fovRatio, bool isocam) const
+VSMatrix VREyeInfo::GetProjection(float fov, float aspectRatio, float fovRatio, bool iso_ortho) const
 {
 	VSMatrix result;
 
-	if (isocam) // Orthographic projection for isometric viewpoint
+	if (iso_ortho) // Orthographic projection for isometric viewpoint
 	{
 		double zNear = -1.0; // screen->GetZNear();
 		double zFar = screen->GetZFar();
 
-		double fH = r_iso_dist * tan(DEG2RAD(fov) / 2) / fovRatio;
+		double fH = tan(DEG2RAD(fov) / 2) / fovRatio;
 		double fW = fH * aspectRatio * mScaleFactor;
 		double left = -fW;
 		double right = fW;

src/common/rendering/hwrenderer/data/hw_vrmodes.h

@@ -27,7 +27,7 @@ struct VREyeInfo
 	float mShiftFactor;
 	float mScaleFactor;
 
-	VSMatrix GetProjection(float fov, float aspectRatio, float fovRatio, bool isocam) const;
+	VSMatrix GetProjection(float fov, float aspectRatio, float fovRatio, bool iso_ortho) const;
 	DVector3 GetViewShift(float yaw) const;
 private:
 	float getShift() const;

src/g_level.cpp

@@ -1803,6 +1803,8 @@ void FLevelLocals::Init()
 	flags3 = 0;
 	ImpactDecalCount = 0;
 	frozenstate = 0;
+	isocam_pitch = 30.f;
+	iso_dist = 300.f;
 
 	info = FindLevelInfo (MapName.GetChars());
 
@@ -1833,6 +1835,12 @@ void FLevelLocals::Init()
 		if (info->gravity == DBL_MAX) gravity = 0;
 		else gravity = info->gravity * 35/TICRATE;
 	}
+	if (info->isocam_pitch < 0.f) isocam_pitch = 0.f;
+	else if (info->isocam_pitch > 89.f) isocam_pitch = 89.f;
+	else isocam_pitch = info->isocam_pitch;
+	if (info->iso_dist < 1.f) iso_dist = 1.f;
+	if (info->iso_dist > 1000.f) iso_dist = 1000.f;
+	else iso_dist = info->iso_dist;
 	if (info->aircontrol != 0.f)
 	{
 		aircontrol = info->aircontrol;

src/g_levellocals.h

@@ -664,6 +664,8 @@ public:
 	double		airfriction;
 	int			airsupply;
 	int			DefaultEnvironment;		// Default sound environment.
+	float		isocam_pitch;
+	float		iso_dist;
 
 	DSeqNode *SequenceListHead;
 
@@ -753,6 +755,17 @@ public:
 		return !(flags & LEVEL_FREELOOK_NO);
 	}
 
+	//==========================================================================
+	//
+	//
+	//==========================================================================
+
+	bool IsIsometricMode() const
+	{
+		return (flags3 & LEVEL3_ISOMETRICMODE);
+		// What to do about multiplayer flags? Add a dmflags3 bit?
+	}
+
 	node_t		*HeadNode() const
 	{
 		return nodes.Size() == 0 ? nullptr : &nodes[nodes.Size() - 1];

src/gamedata/g_mapinfo.cpp

@@ -295,6 +295,8 @@ void level_info_t::Reset()
 	outsidefogdensity = 0;
 	skyfog = 0;
 	pixelstretch = 1.2f;
+	isocam_pitch = 30.f;
+	iso_dist = 300.f;
 
 	specialactions.Clear();
 	DefaultEnvironment = 0;
@@ -1216,6 +1218,20 @@ DEFINE_MAP_OPTION(gravity, true)
 	info->gravity = parse.sc.Float;
 }
 
+DEFINE_MAP_OPTION(isocam_pitch, true)
+{
+	parse.ParseAssign();
+	parse.sc.MustGetFloat();
+	info->isocam_pitch = parse.sc.Float;
+}
+
+DEFINE_MAP_OPTION(iso_dist, true)
+{
+	parse.ParseAssign();
+	parse.sc.MustGetFloat();
+	info->iso_dist = parse.sc.Float;
+}
+
 DEFINE_MAP_OPTION(nogravity, true)
 {
 	info->gravity = DBL_MAX;
@@ -1819,6 +1835,9 @@ MapFlagHandlers[] =
 	{ "disableskyboxao",				MITYPE_CLRFLAG3,	LEVEL3_SKYBOXAO, 0 },
 	{ "avoidmelee",						MITYPE_SETFLAG3,	LEVEL3_AVOIDMELEE, 0 },
 	{ "attenuatelights",				MITYPE_SETFLAG3,	LEVEL3_ATTENUATE, 0 },
+	{ "isometricmode",				MITYPE_SETFLAG3,	LEVEL3_ISOMETRICMODE, 0 },
+	{ "orthographic",				MITYPE_SETFLAG3,	LEVEL3_ORTHOGRAPHIC, 0 },
+	{ "isometricsprites",				MITYPE_SETFLAG3,	LEVEL3_ISOMETRICSPRITES, 0 },
 	{ "nobotnodes",						MITYPE_IGNORE,	0, 0 },		// Skulltag option: nobotnodes
 	{ "nopassover",						MITYPE_COMPATFLAG, COMPATF_NO_PASSMOBJ, 0 },
 	{ "passover",						MITYPE_CLRCOMPATFLAG, COMPATF_NO_PASSMOBJ, 0 },

src/gamedata/g_mapinfo.h

@@ -270,6 +270,10 @@ enum ELevelFlags : unsigned int
 	LEVEL3_AVOIDMELEE			= 0x00020000,	// global flag needed for proper MBF support.
 	LEVEL3_NOJUMPDOWN			= 0x00040000,	// only for MBF21. Inverse of MBF's dog_jumping flag.
 	LEVEL3_LIGHTCREATED			= 0x00080000,	// a light had been created in the last frame
+
+	LEVEL3_ISOMETRICMODE			= 0x00100000,	// render map in isometric camera mode
+	LEVEL3_ORTHOGRAPHIC			= 0x00200000,	// render with orthographic projection (only in isometric camera mode)
+	LEVEL3_ISOMETRICSPRITES			= 0x00400000,	// displace isometrically drawn sprites towards isometric camera
 };
 
 
@@ -376,6 +380,9 @@ struct level_info_t
 	int			skyfog;
 	float		pixelstretch;
 
+	float		isocam_pitch;
+	float		iso_dist;
+
 	// Redirection: If any player is carrying the specified item, then
 	// you go to the RedirectMap instead of this one.
 	FName		RedirectType;

src/playsim/d_player.h

@@ -324,8 +324,7 @@ public:
 	// This only represents the thrust that the player applies himself.
 	// This avoids anomalies with such things as Boom ice and conveyors.
 	DVector2 Vel = { 0,0 };
-        // Used by isometric camera (% 8 cardinal directions) (See RenderViewpoint() in src/rendering/hwrenderer/hw_entrypoint.cpp)
+        // Used by isometric camera (See RenderViewpoint() in src/rendering/hwrenderer/hw_entrypoint.cpp)
-        int isoviewpoint = 1;
         int isoyaw = 225; // degrees
 
 	bool		centering = false;

src/playsim/p_user.cpp

@@ -270,7 +270,6 @@ void player_t::CopyFrom(player_t &p, bool copyPSP)
 	deltaviewheight = p.deltaviewheight;
 	bob = p.bob;
 	Vel = p.Vel;
-	isoviewpoint = p.isoviewpoint;
 	isoyaw = p.isoyaw;
 	centering = p.centering;
 	turnticks = p.turnticks;
@@ -1637,7 +1636,6 @@ void player_t::Serialize(FSerializer &arc)
 		("deltaviewheight", deltaviewheight)
 		("bob", bob)
 		("vel", Vel)
-	        ("isoviewpoint", isoviewpoint)
 	        ("isoyaw", isoyaw)
 		("centering", centering)
 		("health", health)
@@ -1746,7 +1744,6 @@ DEFINE_FIELD_X(PlayerInfo, player_t, viewheight)
 DEFINE_FIELD_X(PlayerInfo, player_t, deltaviewheight)
 DEFINE_FIELD_X(PlayerInfo, player_t, bob)
 DEFINE_FIELD_X(PlayerInfo, player_t, Vel)
-DEFINE_FIELD_X(PlayerInfo, player_t, isoviewpoint)
 DEFINE_FIELD_X(PlayerInfo, player_t, isoyaw)
 DEFINE_FIELD_X(PlayerInfo, player_t, centering)
 DEFINE_FIELD_X(PlayerInfo, player_t, turnticks)

src/rendering/hwrenderer/hw_entrypoint.cpp

@@ -163,28 +163,29 @@ sector_t* RenderViewpoint(FRenderViewpoint& mainvp, AActor* camera, IntRect* bou
 		di->Viewpoint.FieldOfView = DAngle::fromDeg(fov);	// Set the real FOV for the current scene (it's not necessarily the same as the global setting in r_viewpoint)
 
 		// Switch viewpoint for isometric camera
-		if(r_isocam && camera->player != NULL)
+		if((r_isocam || (camera->Level->flags3 & LEVEL3_ISOMETRICMODE)) && camera->player != NULL)
 		{
-		        float camdist = r_iso_dist;
+		        float camdist = camera->Level->iso_dist;
-			if (r_orthographic) camdist = r_iso_camdist;
+			float isocam_pitch = camera->Level->isocam_pitch;
-			float camheight = camdist*FAngle::fromDeg(r_iso_pitch).Tan();
+			if (r_isoviewpoint > 0)
-			camheight -= 0.5*camera->player->viewheight;
+			{
-			int myisoviewpoint = 1;
+			        isocam_pitch = r_iso_pitch;
-			if (r_isoviewpoint > 0 && r_isoviewpoint < 9) myisoviewpoint = r_isoviewpoint - 1;
+				camdist = r_iso_dist;
-			else myisoviewpoint = camera->player->isoviewpoint % 8;
+				camera->player->isoyaw = 45.0 * (r_isoviewpoint - 1); // The eight cardinal directions
-			if (myisoviewpoint < 0) myisoviewpoint = 0;
+			}
-			if (r_isoviewpoint < 9) camera->player->isoyaw = 45.0 * myisoviewpoint; // The eight cardinal directions
+			float inv_iso_dist = 1.0f/camdist; // camdist can change in next line
+			if (r_orthographic || (camera->Level->flags3 & LEVEL3_ORTHOGRAPHIC)) camdist = r_iso_camdist;
 			vp.Pos.X -= camdist * DAngle::fromDeg(camera->player->isoyaw).Cos();
 			vp.Pos.Y -= camdist * DAngle::fromDeg(camera->player->isoyaw).Sin();
-			vp.Pos.Z += camheight;
+			vp.Pos.Z += camdist * FAngle::fromDeg(isocam_pitch).Tan() - 0.5 * camera->player->viewheight;
-			vp.HWAngles.Pitch = FAngle::fromDeg(r_iso_pitch);
+			vp.HWAngles.Pitch = FAngle::fromDeg(isocam_pitch);
-			vp.Angles.Pitch = DAngle::fromDeg(r_iso_pitch);
+			vp.Angles.Pitch = DAngle::fromDeg(isocam_pitch);
 			vp.Angles.Yaw = DAngle::fromDeg(camera->player->isoyaw);
 			vp.Angles.Roll = DAngle::fromDeg(0);
 			vp.showviewer = true; // Draw player sprite
 			r_drawplayersprites = false; // Don't draw first-person hands/weapons
 			// Stereo mode specific perspective projection
-			di->VPUniforms.mProjectionMatrix = eye.GetProjection(fov, ratio, fovratio, r_orthographic);
+			di->VPUniforms.mProjectionMatrix = eye.GetProjection(fov, ratio, fovratio * inv_iso_dist, r_orthographic || (camera->Level->flags3 & LEVEL3_ORTHOGRAPHIC));
 		}
 		else // Regular first-person viewpoint
 		{

src/rendering/hwrenderer/scene/hw_sprites.cpp

@@ -477,9 +477,9 @@ bool HWSprite::CalculateVertices(HWDrawInfo* di, FVector3* v, DVector3* vp)
 			// Rotate the sprite about the vector starting at the center of the sprite
 			// triangle strip and with direction orthogonal to where the player is looking
 			// in the x/y plane.
-		        if(r_isocam) mat.Translate(0.0, z2 - zcenter, 0.0);
+		        if(r_isocam || (di->Level->flags3 & LEVEL3_ISOMETRICMODE)) mat.Translate(0.0, z2 - zcenter, 0.0);
 			mat.Rotate(-sin(angleRad), 0, cos(angleRad), -HWAngles.Pitch.Degrees());
-			if(r_isocam) mat.Translate(0.0, zcenter - z2, 0.0);
+			if(r_isocam || (di->Level->flags3 & LEVEL3_ISOMETRICMODE)) mat.Translate(0.0, zcenter - z2, 0.0);
 		}
 
 		mat.Translate(-center.X, -center.Z, -center.Y); // retreat from sprite center
@@ -902,7 +902,7 @@ void HWSprite::Process(HWDrawInfo *di, AActor* thing, sector_t * sector, area_t
 	{
 		bool mirror = false;
 		DAngle ang = (thingpos - vp.Pos).Angle();
-		if(r_isocam) ang = vp.Angles.Yaw;
+		if(r_isocam || (di->Level->flags3 & LEVEL3_ISOMETRICMODE)) ang = vp.Angles.Yaw;
 		FTextureID patch;
 		// [ZZ] add direct picnum override
 		if (isPicnumOverride)
@@ -1022,7 +1022,7 @@ void HWSprite::Process(HWDrawInfo *di, AActor* thing, sector_t * sector, area_t
 			x2 = x - viewvecY*rightfac;
 			y1 = y + viewvecX*leftfac;
 			y2 = y + viewvecX*rightfac;
-			if(thing->radius > 0 && r_isocam) // If sprites are drawn from an isometric perspective
+			if(di->Level->flags3 & LEVEL3_ISOMETRICSPRITES && (r_isocam  || (di->Level->flags3 & LEVEL3_ISOMETRICMODE))) // If sprites are drawn from an isometric perspective
 			{
 			        float signX = 1.0;
 				float signY = 1.0;
@@ -1076,7 +1076,7 @@ void HWSprite::Process(HWDrawInfo *di, AActor* thing, sector_t * sector, area_t
 	}
 
 	depth = (float)((x - vp.Pos.X) * vp.TanCos + (y - vp.Pos.Y) * vp.TanSin);
-	if(r_isocam) depth = depth * vp.Angles.Pitch.Cos() - vp.Angles.Pitch.Sin() * z2; // Helps with stacking actors with small xy offsets
+	if(r_isocam || (di->Level->flags3 & LEVEL3_ISOMETRICMODE)) depth = depth * vp.PitchCos - vp.PitchSin * z2; // Helps with stacking actors with small xy offsets
 	if (isSpriteShadow) depth += 1.f/65536.f; // always sort shadows behind the sprite.
 
 	// light calculation

src/rendering/r_utility.cpp

@@ -103,7 +103,7 @@ CVAR (Bool, r_drawvoxels, true, 0)
 CVAR (Bool, r_drawplayersprites, true, 0)	// [RH] Draw player sprites?
 CVARD (Bool, r_isocam, false,  CVAR_ARCHIVE | CVAR_SERVERINFO | CVAR_CHEAT, "render from isometric viewpoint.")
 CVARD (Bool, r_orthographic, true, CVAR_ARCHIVE | CVAR_SERVERINFO | CVAR_CHEAT, "render orthographic projection. Only used with r_isocam")
-CUSTOM_CVARD(Float, r_iso_pitch, 30.0f, CVAR_ARCHIVE | CVAR_SERVERINFO | CVAR_CHEAT, "pitch for isometric camera: 0 to 89 degrees.")
+CUSTOM_CVARD(Float, r_iso_pitch, 30.0f, CVAR_ARCHIVE | CVAR_SERVERINFO | CVAR_CHEAT, "pitch for isometric camera: 0 to 89 degrees. Used only if r_isoviewpoint > 0.")
 {
   if (self < 0.f)
     self = 0.f;
@@ -116,14 +116,14 @@ CUSTOM_CVAR(Float, r_iso_camdist, 1000.0f, CVAR_ARCHIVE | CVAR_SERVERINFO | CVAR
   if (self < 1000.f)
     self = 1000.f;
 }
-CUSTOM_CVARD(Int, r_isoviewpoint, 0, CVAR_ARCHIVE, "Isometric viewpoint angle. 1 to 8 for cardinal directions. 0 for ignore and use player->isoviewpoint. 9 for continuous use player->isoyaw.")
+CUSTOM_CVARD(Int, r_isoviewpoint, 0, CVAR_ARCHIVE, "Isometric viewpoint angle. 1 to 8 for cardinal directions using r_iso_pitch and r_iso_dist. 0 for ignore and use player->isoyaw, level->isocam_pitch and level->iso_dist (from mapinfo).")
 {
 	if (self < 0)
 		self = 0;
-	else if (self > 9)
+	else if (self > 8)
-		self = 9;
+		self = 8;
 }
-CUSTOM_CVARD(Float, r_iso_dist, 300.0, CVAR_ARCHIVE | CVAR_SERVERINFO | CVAR_CHEAT, "how far the isometric camera (r_isocam) is in the XY plane")
+CUSTOM_CVARD(Float, r_iso_dist, 300.0, CVAR_ARCHIVE | CVAR_SERVERINFO | CVAR_CHEAT, "how far the isometric camera (r_isocam) is in the XY plane. Used only if r_isoviewpoint > 0.")
 {
 	if (self < 0.f)
 		self = 0.f;
@@ -182,6 +182,8 @@ FRenderViewpoint::FRenderViewpoint()
 	Sin = 0.0;
 	TanCos = 0.0;
 	TanSin = 0.0;
+	PitchCos = 0.0;
+	PitchSin = 0.0;
 	camera = nullptr;
 	sector = nullptr;
 	FieldOfView =  DAngle::fromDeg(90.); // Angles in the SCREENWIDTH wide window
@@ -659,6 +661,9 @@ void FRenderViewpoint::SetViewAngle (const FViewWindow &viewwindow)
 	TanSin = viewwindow.FocalTangent * Sin;
 	TanCos = viewwindow.FocalTangent * Cos;
 
+	PitchSin = Angles.Pitch.Sin();
+	PitchCos = Angles.Pitch.Cos();
+
 	DVector2 v = Angles.Yaw.ToVector();
 	ViewVector.X = v.X;
 	ViewVector.Y = v.Y;

src/rendering/r_utility.h

@@ -33,6 +33,8 @@ struct FRenderViewpoint
 	double			Sin;			// sin(Angles.Yaw)
 	double			TanCos;			// FocalTangent * cos(Angles.Yaw)
 	double			TanSin;			// FocalTangent * sin(Angles.Yaw)
+	double			PitchCos;			// cos(Angles.Pitch)
+	double			PitchSin;			// sin(Angles.Pitch)
 
 	AActor			*camera;		// camera actor
 	sector_t		*sector;		// [RH] keep track of sector viewing from

src/scripting/vmthunks.cpp

@@ -1694,6 +1694,22 @@ DEFINE_ACTION_FUNCTION_NATIVE(_Sector, SetXOffset, SetXOffset)
 	 ACTION_RETURN_BOOL(self->IsFreelookAllowed());
  }
  
+ //==========================================================================
+ //
+ //
+ //==========================================================================
+
+ static int IsIsometricMode(FLevelLocals *self)
+ {
+	 return self->IsIsometricMode();
+ }
+
+ DEFINE_ACTION_FUNCTION_NATIVE(FLevelLocals, IsIsometricMode, IsIsometricMode)
+ {
+	 PARAM_SELF_STRUCT_PROLOGUE(FLevelLocals);
+	 ACTION_RETURN_BOOL(self->IsIsometricMode());
+ }
+
  //==========================================================================
 //
 // ZScript counterpart to ACS ChangeSky, uses TextureIDs

wadsrc/static/zscript/actors/player/player.zs

@@ -2744,7 +2744,6 @@ struct PlayerInfo native play	// self is what internally is known as player_t
 	native double deltaviewheight;
 	native double bob;
 	native vector2 vel;
-	native int isoviewpoint;
 	native int isoyaw;
 	native bool centering;
 	native uint8 turnticks;

wadsrc/static/zscript/doombase.zs

@@ -490,6 +490,7 @@ struct LevelLocals native
 	native bool IsJumpingAllowed() const;
 	native bool IsCrouchingAllowed() const;
 	native bool IsFreelookAllowed() const;
+	native bool IsIsometricMode() const;
 	native void StartIntermission(Name type, int state) const;
 	native play SpotState GetSpotState(bool create = true);
 	native int FindUniqueTid(int start = 0, int limit = 0);