Commence renderer floatification

src/r_3dfloors.cpp

@@ -21,8 +21,8 @@ F3DFloor *fakeFloor;
 fixed_t fakeHeight;
 fixed_t fakeAlpha;
 int fakeActive = 0;
-fixed_t sclipBottom;
-fixed_t sclipTop;
+double sclipBottom;
+double sclipTop;
 HeightLevel *height_top = NULL;
 HeightLevel *height_cur = NULL;
 int CurrentMirror = 0;

src/r_3dfloors.h

@@ -7,7 +7,7 @@
 
 struct HeightLevel
 {
-	fixed_t height;
+	double height;
 	struct HeightLevel *prev;
 	struct HeightLevel *next;
 };
@@ -51,8 +51,8 @@ extern int fake3D;
 extern F3DFloor *fakeFloor;
 extern fixed_t fakeAlpha;
 extern int fakeActive;
-extern fixed_t sclipBottom;
-extern fixed_t sclipTop;
+extern double sclipBottom;
+extern double sclipTop;
 extern HeightLevel *height_top;
 extern HeightLevel *height_cur;
 extern int CurrentMirror;

src/r_bsp.cpp

@@ -336,7 +336,7 @@ sector_t *R_FakeFlat(sector_t *sec, sector_t *tempsec,
 	{
 		sector_t *heightsec = viewsector->heightsec;
 		bool underwater = r_fakingunderwater ||
-			(heightsec && heightsec->floorplane.PointOnSide(viewx, viewy, viewz) <= 0);
+			(heightsec && heightsec->floorplane.PointOnSide(ViewPos) <= 0);
 		bool doorunderwater = false;
 		int diffTex = (s->MoreFlags & SECF_CLIPFAKEPLANES);
 
@@ -395,8 +395,8 @@ sector_t *R_FakeFlat(sector_t *sec, sector_t *tempsec,
 			}
 		}
 
-		fixed_t refceilz = s->ceilingplane.ZatPointFixed (viewx, viewy);
-		fixed_t orgceilz = sec->ceilingplane.ZatPointFixed(viewx, viewy);
+		double refceilz = s->ceilingplane.ZatPoint(ViewPos);
+		double orgceilz = sec->ceilingplane.ZatPoint(ViewPos);
 
 #if 1
 		// [RH] Allow viewing underwater areas through doors/windows that
@@ -405,8 +405,8 @@ sector_t *R_FakeFlat(sector_t *sec, sector_t *tempsec,
 		// sectors at the same time.
 		if (back && !r_fakingunderwater && curline->frontsector->heightsec == NULL)
 		{
-			if (rw_frontcz1 <= s->floorplane.ZatPointFixed (curline->v1) &&
-				rw_frontcz2 <= s->floorplane.ZatPointFixed(curline->v2))
+			if (rw_frontcz1 <= s->floorplane.ZatPoint(curline->v1) &&
+				rw_frontcz2 <= s->floorplane.ZatPoint(curline->v2))
 			{
 				// Check that the window is actually visible
 				for (int z = WallC.sx1; z < WallC.sx2; ++z)
@@ -470,7 +470,7 @@ sector_t *R_FakeFlat(sector_t *sec, sector_t *tempsec,
 			}
 			FakeSide = FAKED_BelowFloor;
 		}
-		else if (heightsec && heightsec->ceilingplane.PointOnSide(viewx, viewy, viewz) <= 0 &&
+		else if (heightsec && heightsec->ceilingplane.PointOnSide(ViewPos) <= 0 &&
 				 orgceilz > refceilz && !(s->MoreFlags & SECF_FAKEFLOORONLY))
 		{	// Above-ceiling hack
 			tempsec->ceilingplane		= s->ceilingplane;
@@ -540,23 +540,21 @@ void R_AddLine (seg_t *line)
 {
 	static sector_t tempsec;	// killough 3/8/98: ceiling/water hack
 	bool			solid;
-	fixed_t			tx1, tx2, ty1, ty2;
+	DVector2		pt1, pt2;
 
 	curline = line;
 
 	// [RH] Color if not texturing line
 	dc_color = (((int)(line - segs) * 8) + 4) & 255;
 
-	tx1 = line->v1->fixX() - viewx;
-	tx2 = line->v2->fixX() - viewx;
-	ty1 = line->v1->fixY() - viewy;
-	ty2 = line->v2->fixY() - viewy;
+	pt1 = line->v1->fPos() - ViewPos;
+	pt2 = line->v2->fPos() - ViewPos;
 
 	// Reject lines not facing viewer
-	if (DMulScale32 (ty1, tx1-tx2, tx1, ty2-ty1) >= 0)
+	if (pt1.Y * (pt1.X - pt2.X) + pt1.X * (pt2.Y - pt1.Y) >= 0)
 		return;
 
-	if (WallC.Init(tx1, ty1, tx2, ty2, 32))
+	if (WallC.Init(pt1, pt2, 32.0 / (1 << 12)))
 		return;
 
 	if (WallC.sx1 >= WindowRight || WallC.sx2 <= WindowLeft)
@@ -591,7 +589,7 @@ void R_AddLine (seg_t *line)
 		{
 			swapvalues (v1, v2);
 		}
-		WallT.InitFromLine(v1->fixX() - viewx, v1->fixY() - viewy, v2->fixX() - viewx, v2->fixY() - viewy);
+		WallT.InitFromLine(v1->fPos() - ViewPos, v2->fPos() - ViewPos);
 	}
 
 	if (!(fake3D & FAKE3D_FAKEBACK))
@@ -773,57 +771,57 @@ void R_AddLine (seg_t *line)
 //
 // Transform and clip coordinates. Returns true if it was clipped away
 //
-bool FWallCoords::Init(int x1, int y1, int x2, int y2, int too_close)
+bool FWallCoords::Init(const DVector2 &pt1, const DVector2 &pt2, double too_close)
 {
-	tx1 = DMulScale20(x1, viewsin, -y1, viewcos);
-	tx2 = DMulScale20(x2, viewsin, -y2, viewcos);
+	tleft.X =  float(pt1.X * ViewSin - pt1.Y * ViewCos);
+	tright.X = float(pt2.X * ViewSin - pt2.Y * ViewCos);
 
-	ty1 = DMulScale20(x1, viewtancos, y1, viewtansin);
-	ty2 = DMulScale20(x2, viewtancos, y2, viewtansin);
+	tleft.Y =  float(pt1.X * ViewTanCos + pt1.Y * ViewTanSin);
+	tright.Y = float(pt2.X * ViewTanCos + pt2.Y * ViewTanSin);
 
 	if (MirrorFlags & RF_XFLIP)
 	{
-		int t = 256 - tx1;
-		tx1 = 256 - tx2;
-		tx2 = t;
-		swapvalues(ty1, ty2);
+		float t = -tleft.X;
+		tleft.X = -tright.X;
+		tright.X = t;
+		swapvalues(tleft.Y, tright.Y);
 	}
 
-	if (tx1 >= -ty1)
+	if (tleft.X >= -tleft.Y)
 	{
-		if (tx1 > ty1) return true;	// left edge is off the right side
-		if (ty1 == 0) return true;
-		sx1 = (centerxfrac + Scale(tx1, centerxfrac, ty1)) >> FRACBITS;
-		if (tx1 >= 0) sx1 = MIN(viewwidth, sx1+1); // fix for signed divide
-		sz1 = ty1;
+		if (tleft.X > tleft.Y) return true;	// left edge is off the right side
+		if (tleft.Y == 0) return true;
+		sx1 = xs_ToInt(CenterX + tleft.X * CenterX / tleft.Y);
+		if (tleft.X >= 0) sx1 = MIN(viewwidth, sx1+1); // fix for signed divide
+		sz1 = tleft.Y;
 	}
 	else
 	{
-		if (tx2 < -ty2) return true;	// wall is off the left side
-		fixed_t den = tx1 - tx2 - ty2 + ty1;	
+		if (tright.X < -tright.Y) return true;	// wall is off the left side
+		float den = tleft.X - tright.X - tright.Y + tleft.Y;
 		if (den == 0) return true;
 		sx1 = 0;
-		sz1 = ty1 + Scale(ty2 - ty1, tx1 + ty1, den);
+		sz1 = tleft.Y + (tright.Y - tleft.Y) * (tleft.X + tleft.Y) / den;
 	}
 
 	if (sz1 < too_close)
 		return true;
 
-	if (tx2 <= ty2)
+	if (tright.X <= tright.Y)
 	{
-		if (tx2 < -ty2) return true;	// right edge is off the left side
-		if (ty2 == 0) return true;
-		sx2 = (centerxfrac + Scale(tx2, centerxfrac, ty2)) >> FRACBITS;
-		if (tx2 >= 0) sx2 = MIN(viewwidth, sx2+1);	// fix for signed divide
-		sz2 = ty2;
+		if (tright.X < -tright.Y) return true;	// right edge is off the left side
+		if (tright.Y == 0) return true;
+		sx2 = xs_ToInt(CenterX + tright.X * CenterX / tright.Y);
+		if (tright.X >= 0) sx2 = MIN(viewwidth, sx2+1);	// fix for signed divide
+		sz2 = tright.Y;
 	}
 	else
 	{
-		if (tx1 > ty1) return true;	// wall is off the right side
-		fixed_t den = ty2 - ty1 - tx2 + tx1;
+		if (tleft.X > tleft.Y) return true;	// wall is off the right side
+		float den = tright.Y - tleft.Y - tright.X + tleft.X;
 		if (den == 0) return true;
 		sx2 = viewwidth;
-		sz2 = ty1 + Scale(ty2 - ty1, tx1 - ty1, den);
+		sz2 = tleft.Y + (tright.Y - tleft.Y) * (tleft.X - tleft.Y) / den;
 	}
 
 	if (sz2 < too_close || sx2 <= sx1)
@@ -834,28 +832,25 @@ bool FWallCoords::Init(int x1, int y1, int x2, int y2, int too_close)
 
 void FWallTmapVals::InitFromWallCoords(const FWallCoords *wallc)
 {
+	const FVector2 *left = &wallc->tleft;
+	const FVector2 *right = &wallc->tright;
+
 	if (MirrorFlags & RF_XFLIP)
 	{
-		UoverZorg = (float)wallc->tx2 * centerx;
-		UoverZstep = (float)(-wallc->ty2);
-		InvZorg = (float)(wallc->tx2 - wallc->tx1) * centerx;
-		InvZstep = (float)(wallc->ty1 - wallc->ty2);
-	}
-	else
-	{
-		UoverZorg = (float)wallc->tx1 * centerx;
-		UoverZstep = (float)(-wallc->ty1);
-		InvZorg = (float)(wallc->tx1 - wallc->tx2) * centerx;
-		InvZstep = (float)(wallc->ty2 - wallc->ty1);
+		swapvalues(left, right);
 	}
+	UoverZorg = left->X * centerx;
+	UoverZstep = -left->Y;
+	InvZorg = (left->X - right->X) * centerx;
+	InvZstep = right->Y - left->Y;
 }
 
-void FWallTmapVals::InitFromLine(int tx1, int ty1, int tx2, int ty2)
+void FWallTmapVals::InitFromLine(const DVector2 &left, const DVector2 &right)
 { // Coordinates should have already had viewx,viewy subtracted
-	fixed_t fullx1 = DMulScale20 (tx1, viewsin, -ty1, viewcos);
-	fixed_t fullx2 = DMulScale20 (tx2, viewsin, -ty2, viewcos);
-	fixed_t fully1 = DMulScale20 (tx1, viewtancos, ty1, viewtansin);
-	fixed_t fully2 = DMulScale20 (tx2, viewtancos, ty2, viewtansin);
+	double fullx1 = left.X * ViewSin - left.Y * ViewCos;
+	double fullx2 = right.X * ViewSin - right.Y * ViewCos;
+	double fully1 = left.X * ViewTanCos + left.Y * ViewTanSin;
+	double fully2 = right.X * ViewTanCos + right.Y * ViewTanSin;
 
 	if (MirrorFlags & RF_XFLIP)
 	{
@@ -863,10 +858,10 @@ void FWallTmapVals::InitFromLine(int tx1, int ty1, int tx2, int ty2)
 		fullx2 = -fullx2;
 	}
 
-	UoverZorg = (float)fullx1 * centerx;
-	UoverZstep = (float)(-fully1);
-	InvZorg = (float)(fullx1 - fullx2) * centerx;
-	InvZstep = (float)(fully2 - fully1);
+	UoverZorg = float(fullx1 * centerx);
+	UoverZstep = float(-fully1);
+	InvZorg = float((fullx1 - fullx2) * centerx);
+	InvZstep = float(fully2 - fully1);
 }
 
 //
@@ -896,24 +891,24 @@ static bool R_CheckBBox (fixed_t *bspcoord)	// killough 1/28/98: static
 	int 				boxy;
 	int 				boxpos;
 
-	fixed_t 			x1, y1, x2, y2;
-	fixed_t				rx1, ry1, rx2, ry2;
+	double	 			x1, y1, x2, y2;
+	double				rx1, ry1, rx2, ry2;
 	int					sx1, sx2;
 	
 	cliprange_t*		start;
 
 	// Find the corners of the box
 	// that define the edges from current viewpoint.
-	if (viewx <= bspcoord[BOXLEFT])
+	if (ViewPos.X <= FIXED2DBL(bspcoord[BOXLEFT]))
 		boxx = 0;
-	else if (viewx < bspcoord[BOXRIGHT])
+	else if (ViewPos.X < FIXED2DBL(bspcoord[BOXRIGHT]))
 		boxx = 1;
 	else
 		boxx = 2;
 
-	if (viewy >= bspcoord[BOXTOP])
+	if (ViewPos.Y >= FIXED2DBL(bspcoord[BOXTOP]))
 		boxy = 0;
-	else if (viewy > bspcoord[BOXBOTTOM])
+	else if (ViewPos.Y > FIXED2DBL(bspcoord[BOXBOTTOM]))
 		boxy = 1;
 	else
 		boxy = 2;
@@ -922,26 +917,26 @@ static bool R_CheckBBox (fixed_t *bspcoord)	// killough 1/28/98: static
 	if (boxpos == 5)
 		return true;
 
-	x1 = bspcoord[checkcoord[boxpos][0]] - viewx;
-	y1 = bspcoord[checkcoord[boxpos][1]] - viewy;
-	x2 = bspcoord[checkcoord[boxpos][2]] - viewx;
-	y2 = bspcoord[checkcoord[boxpos][3]] - viewy;
+	x1 = FIXED2DBL(bspcoord[checkcoord[boxpos][0]]) - ViewPos.X;
+	y1 = FIXED2DBL(bspcoord[checkcoord[boxpos][1]]) - ViewPos.Y;
+	x2 = FIXED2DBL(bspcoord[checkcoord[boxpos][2]]) - ViewPos.X;
+	y2 = FIXED2DBL(bspcoord[checkcoord[boxpos][3]]) - ViewPos.Y;
 
 	// check clip list for an open space
 
 	// Sitting on a line?
-	if (DMulScale32 (y1, x1-x2, x1, y2-y1) >= 0)
+	if (y1 * (x1 - x2) + x1 * (y2 - y1) >= -EQUAL_EPSILON)
 		return true;
 
-	rx1 = DMulScale20 (x1, viewsin, -y1, viewcos);
-	rx2 = DMulScale20 (x2, viewsin, -y2, viewcos);
-	ry1 = DMulScale20 (x1, viewtancos, y1, viewtansin);
-	ry2 = DMulScale20 (x2, viewtancos, y2, viewtansin);
+	rx1 = x1 * ViewSin - y1 * ViewCos;
+	rx2 = x2 * ViewSin - y2 * ViewCos;
+	ry1 = x1 * ViewTanCos + y1 * ViewTanSin;
+	ry2 = x2 * ViewTanCos + y2 * ViewTanSin;
 
 	if (MirrorFlags & RF_XFLIP)
 	{
-		int t = 256-rx1;
-		rx1 = 256-rx2;
+		double t = -rx1;
+		rx1 = -rx2;
 		rx2 = t;
 		swapvalues(ry1, ry2);
 	}
@@ -950,7 +945,7 @@ static bool R_CheckBBox (fixed_t *bspcoord)	// killough 1/28/98: static
 	{
 		if (rx1 > ry1) return false;	// left edge is off the right side
 		if (ry1 == 0) return false;
-		sx1 = (centerxfrac + Scale (rx1, centerxfrac, ry1)) >> FRACBITS;
+		sx1 = xs_ToInt(CenterX + rx1 * CenterX / ry1);
 		if (rx1 >= 0) sx1 = MIN<int>(viewwidth, sx1+1);	// fix for signed divide
 	}
 	else
@@ -964,7 +959,7 @@ static bool R_CheckBBox (fixed_t *bspcoord)	// killough 1/28/98: static
 	{
 		if (rx2 < -ry2) return false;	// right edge is off the left side
 		if (ry2 == 0) return false;
-		sx2 = (centerxfrac + Scale (rx2, centerxfrac, ry2)) >> FRACBITS;
+		sx2 = xs_ToInt(CenterX + rx2 * CenterX / ry2);
 		if (rx2 >= 0) sx2 = MIN<int>(viewwidth, sx2+1);	// fix for signed divide
 	}
 	else
@@ -1116,7 +1111,7 @@ void R_Subsector (subsector_t *sub)
 
 	portal = frontsector->ValidatePortal(sector_t::ceiling);
 
-	ceilingplane = frontsector->ceilingplane.PointOnSide(viewx, viewy, viewz) > 0 ||
+	ceilingplane = frontsector->ceilingplane.PointOnSide(ViewPos) > 0 ||
 		frontsector->GetTexture(sector_t::ceiling) == skyflatnum ||
 		portal != NULL ||
 		(frontsector->heightsec && 
@@ -1157,7 +1152,7 @@ void R_Subsector (subsector_t *sub)
 	// killough 10/98: add support for skies transferred from sidedefs
 	portal = frontsector->ValidatePortal(sector_t::floor);
 
-	floorplane = frontsector->floorplane.PointOnSide(viewx, viewy, viewz) > 0 || // killough 3/7/98
+	floorplane = frontsector->floorplane.PointOnSide(ViewPos) > 0 || // killough 3/7/98
 		frontsector->GetTexture(sector_t::floor) == skyflatnum ||
 		portal != NULL ||
 		(frontsector->heightsec &&
@@ -1408,7 +1403,7 @@ void R_RenderBSPNode (void *node)
 		node_t *bsp = (node_t *)node;
 
 		// Decide which side the view point is on.
-		int side = R_PointOnSide (viewx, viewy, bsp);
+		int side = R_PointOnSide (ViewPos, bsp);
 
 		// Recursively divide front space (toward the viewer).
 		R_RenderBSPNode (bsp->children[side]);

src/r_bsp.h

@@ -30,17 +30,17 @@
 // The 3072 below is just an arbitrary value picked to avoid
 // drawing lines the player is too close to that would overflow
 // the texture calculations.
-#define TOO_CLOSE_Z 3072
+#define TOO_CLOSE_Z (3072.0 / (1<<12))
 
 struct FWallCoords
 {
-	fixed_t		tx1, tx2;	// x coords at left, right of wall in view space	rx1,rx2
-	fixed_t		ty1, ty2;	// y coords at left, right of wall in view space	ry1,ry2
+	FVector2	tleft;		// coords at left of wall in view space				rx1,ry1
+	FVector2	tright;		// coords at right of wall in view space			rx2,ry2
 
+	float		sz1, sz2;	// depth at left, right of wall in screen space		yb1,yb2
 	short		sx1, sx2;	// x coords at left, right of wall in screen space	xb1,xb2
-	fixed_t		sz1, sz2;	// depth at left, right of wall in screen space		yb1,yb2
 
-	bool Init(int x1, int y1, int x2, int y2, int too_close);
+	bool Init(const DVector2 &pt1, const DVector2 &pt2, double too_close);
 };
 
 struct FWallTmapVals
@@ -49,7 +49,7 @@ struct FWallTmapVals
 	float		InvZorg, InvZstep;
 
 	void InitFromWallCoords(const FWallCoords *wallc);
-	void InitFromLine(int x1, int y1, int x2, int y2);
+	void InitFromLine(const DVector2 &left, const DVector2 &right);
 };
 
 extern FWallCoords WallC;
@@ -69,9 +69,9 @@ struct drawseg_t
 	fixed_t		iscale, iscalestep;
 	short 		x1, x2;			// Same as sx1 and sx2, but clipped to the drawseg
 	short		sx1, sx2;		// left, right of parent seg on screen
-	fixed_t		sz1, sz2;		// z for left, right of parent seg on screen
-	fixed_t		siz1, siz2;		// 1/z for left, right of parent seg on screen
-	fixed_t		cx, cy, cdx, cdy;
+	float		sz1, sz2;		// z for left, right of parent seg on screen
+	float		siz1, siz2;		// 1/z for left, right of parent seg on screen
+	float		cx, cy, cdx, cdy;
 	fixed_t		yrepeat;
 	BYTE 		silhouette;		// 0=none, 1=bottom, 2=top, 3=both
 	BYTE		bFogBoundary;

src/r_defs.h

@@ -326,9 +326,9 @@ public:
 	}
 
 	// Returns the value of z at (0,0) This is used by the 3D floor code which does not handle slopes
-	fixed_t Zat0 () const
+	double Zat0() const
 	{
-		return FLOAT2FIXED(negiC*D);
+		return negiC*D;
 	}
 
 	// Returns the value of z at (x,y)
@@ -362,6 +362,10 @@ public:
 		return (D + normal.X*pos.X + normal.Y*pos.Y) * negiC;
 	}
 
+	double ZatPoint(const FVector2 &pos) const
+	{
+		return (D + normal.X*pos.X + normal.Y*pos.Y) * negiC;
+	}
 
 	double ZatPoint(const vertex_t *v) const
 	{

src/r_drawt.cpp

@@ -1136,7 +1136,7 @@ void R_DrawMaskedColumnHoriz (const BYTE *column, const FTexture::Span *span)
 			if (sprflipvert)
 			{
 				dc_texturefrac = (dc_yl*dc_iscale) - (top << FRACBITS)
-					- FixedMul (centeryfrac, dc_iscale) - dc_texturemid;
+					- fixed_t(CenterY * dc_iscale) - dc_texturemid;
 				const fixed_t maxfrac = length << FRACBITS;
 				while (dc_texturefrac >= maxfrac)
 				{
@@ -1155,7 +1155,7 @@ void R_DrawMaskedColumnHoriz (const BYTE *column, const FTexture::Span *span)
 			else
 			{
 				dc_texturefrac = dc_texturemid - (top << FRACBITS)
-					+ (dc_yl*dc_iscale) - FixedMul (centeryfrac-FRACUNIT, dc_iscale);
+					+ (dc_yl*dc_iscale) - fixed_t((CenterY-1) * dc_iscale);
 				while (dc_texturefrac < 0)
 				{
 					if (++dc_yl > dc_yh)

src/r_main.cpp

@@ -113,24 +113,22 @@ fixed_t			r_SkyVisibility;
 
 fixed_t			GlobVis;
 fixed_t			viewingrangerecip;
-fixed_t			FocalLengthX;
-fixed_t			FocalLengthY;
-float			FocalLengthXfloat;
+double			FocalLengthX;
+double			FocalLengthY;
 FDynamicColormap*basecolormap;		// [RH] colormap currently drawing with
 int				fixedlightlev;
 lighttable_t	*fixedcolormap;
 FSpecialColormap *realfixedcolormap;
-float			WallTMapScale2;
+double			WallTMapScale2;
 
 
 bool			bRenderingToCanvas;	// [RH] True if rendering to a special canvas
-fixed_t			globaluclip, globaldclip;
-fixed_t 		centerxfrac;
-fixed_t 		centeryfrac;
-fixed_t			yaspectmul;
-fixed_t			baseyaspectmul;		// yaspectmul without a forced aspect ratio
-float			iyaspectmulfloat;
-fixed_t			InvZtoScale;
+double			globaluclip, globaldclip;
+double			CenterX, CenterY;
+double			YaspectMul;
+double			BaseYaspectMul;		// yaspectmul without a forced aspect ratio
+double			IYaspectMul;
+double			InvZtoScale;
 
 // just for profiling purposes
 int 			linecount;
@@ -188,9 +186,8 @@ static inline int viewangletox(int i)
 	}
 	else
 	{
-		int t = FixedMul(finetangent[i], FocalLengthX);
-		t = (centerxfrac - t + FRACUNIT-1) >> FRACBITS;
-		return clamp(t, -1, viewwidth+1);
+		double t = FIXED2DBL(finetangent[i]) * FocalLengthX;
+		return clamp(xs_CeilToInt(CenterX - t), -1, viewwidth+1);
 	}
 }
 
@@ -205,9 +202,8 @@ void R_InitTextureMapping ()
 	int i, x;
 
 	// Calc focallength so FieldOfView fineangles covers viewwidth.
-	FocalLengthX = FixedDiv (centerxfrac, FocalTangent);
-	FocalLengthY = Scale (centerxfrac, yaspectmul, FocalTangent);
-	FocalLengthXfloat = (float)FocalLengthX / 65536.f;
+	FocalLengthX = CenterX / FocalTangent;
+	FocalLengthY = FocalLengthX * YaspectMul;
 
 	// This is 1/FocalTangent before the widescreen extension of FOV.
 	viewingrangerecip = DivScale32(1, finetangent[FINEANGLES/4+(FieldOfView/2)]);
@@ -224,9 +220,9 @@ void R_InitTextureMapping ()
 	//   the drawn sky texture.
 	// The remaining arcs are done with tantoangle instead.
 
-	const int t1 = MAX<int>(centerx - (FocalLengthX >> FRACBITS), 0);
-	const int t2 = MIN<int>(centerx + (FocalLengthX >> FRACBITS), viewwidth);
-	const fixed_t dfocus = FocalLengthX >> DBITS;
+	const int t1 = MAX(int(CenterX - FocalLengthX), 0);
+	const int t2 = MIN(int(CenterX + FocalLengthX), viewwidth);
+	const fixed_t dfocus = FLOAT2FIXED(FocalLengthX) >> DBITS;
 
 	for (i = 0, x = t2; x >= t1; --x)
 	{
@@ -278,8 +274,8 @@ void R_SetVisibility (float vis)
 	else
 		r_WallVisibility = r_BaseVisibility;
 
-	r_WallVisibility = FixedMul (Scale (InvZtoScale, SCREENWIDTH*BaseRatioSizes[WidescreenRatio][1],
-		viewwidth*SCREENHEIGHT*3), FixedMul (r_WallVisibility, FocalTangent));
+	r_WallVisibility = FixedMul (FLOAT2FIXED(InvZtoScale * SCREENWIDTH*BaseRatioSizes[WidescreenRatio][1] /
+		(viewwidth*SCREENHEIGHT*3)), xs_ToInt(r_WallVisibility * FocalTangent));
 
 	// Prevent overflow on floors/ceilings. Note that the calculation of
 	// MaxVisForFloor means that planes less than two units from the player's
@@ -292,7 +288,7 @@ void R_SetVisibility (float vis)
 	else
 		r_FloorVisibility = r_BaseVisibility;
 
-	r_FloorVisibility = Scale (160*FRACUNIT, r_FloorVisibility, FocalLengthY);
+	r_FloorVisibility = xs_ToInt(160.0 * r_FloorVisibility / FocalLengthY);
 
 	r_TiltVisibility = vis * (float)FocalTangent * (16.f * 320.f) / (float)viewwidth;
 	r_SpriteVisibility = r_WallVisibility;
@@ -359,8 +355,8 @@ void R_SWRSetWindow(int windowSize, int fullWidth, int fullHeight, int stHeight,
 	halfviewwidth = (viewwidth >> 1) - 1;
 
 	lastcenteryfrac = 1<<30;
-	centerxfrac = centerx<<FRACBITS;
-	centeryfrac = centery<<FRACBITS;
+	CenterX = centerx;
+	CenterY = centery;
 
 	virtwidth = virtwidth2 = fullWidth;
 	virtheight = virtheight2 = fullHeight;
@@ -383,16 +379,16 @@ void R_SWRSetWindow(int windowSize, int fullWidth, int fullHeight, int stHeight,
 		virtwidth = virtwidth * BaseRatioSizes[WidescreenRatio][3] / 48;
 	}
 
-	baseyaspectmul = Scale(320 << FRACBITS, virtheight2, r_Yaspect * virtwidth2);
-	yaspectmul = Scale ((320<<FRACBITS), virtheight, r_Yaspect * virtwidth);
-	iyaspectmulfloat = (float)virtwidth * r_Yaspect / 320.f / (float)virtheight;
-	InvZtoScale = yaspectmul * centerx;
+	BaseYaspectMul = 320.0 * virtheight2 / (r_Yaspect * virtwidth2);
+	YaspectMul = 320.0 * virtheight / (r_Yaspect * virtwidth);
+	IYaspectMul = (double)virtwidth * r_Yaspect / 320.0 / virtheight;
+	InvZtoScale = YaspectMul * CenterX;
 
-	WallTMapScale2 = iyaspectmulfloat * 64.f / (float)centerx;
+	WallTMapScale2 = IYaspectMul * (1 << 18) / CenterX;
 
 	// psprite scales
 	pspritexscale = (centerxwide << FRACBITS) / 160;
-	pspriteyscale = FixedMul (pspritexscale, yaspectmul);
+	pspriteyscale = FLOAT2FIXED(pspritexscale * YaspectMul);
 	pspritexiscale = FixedDiv(FRACUNIT, pspritexscale);
 
 	// thing clipping
@@ -400,10 +396,10 @@ void R_SWRSetWindow(int windowSize, int fullWidth, int fullHeight, int stHeight,
 
 	R_InitTextureMapping ();
 
-	MaxVisForWall = FixedMul (Scale (InvZtoScale, SCREENWIDTH*r_Yaspect,
-		viewwidth*SCREENHEIGHT), FocalTangent);
+	MaxVisForWall = FLOAT2FIXED((InvZtoScale * (SCREENWIDTH*r_Yaspect) /
+		(viewwidth*SCREENHEIGHT * FocalTangent)));
 	MaxVisForWall = FixedDiv (0x7fff0000, MaxVisForWall);
-	MaxVisForFloor = Scale (FixedDiv (0x7fff0000, viewheight<<(FRACBITS-2)), FocalLengthY, 160*FRACUNIT);
+	MaxVisForFloor = int(0x7fff0000 / (viewheight * FocalLengthY / 160));
 
 	// Reset r_*Visibility vars
 	R_SetVisibility (R_GetVisibility ());
@@ -489,10 +485,8 @@ static void R_ShutdownRenderer()
 
 void R_CopyStackedViewParameters()
 {
-	stacked_viewx = viewx;
-	stacked_viewy = viewy;
-	stacked_viewz = viewz;
-	stacked_angle = viewangle;
+	stacked_viewpos = ViewPos;
+	stacked_angle = ViewAngle;
 	stacked_extralight = extralight;
 	stacked_visibility = R_GetVisibility();
 }
@@ -552,58 +546,59 @@ void R_SetupColormap(player_t *player)
 void R_SetupFreelook()
 {
 	{
-		fixed_t dy;
+		double dy;
 		
 		if (camera != NULL)
 		{
-			dy = FixedMul (FocalLengthY, finetangent[(ANGLE_90-viewpitch)>>ANGLETOFINESHIFT]);
+			dy = FocalLengthY * (-ViewPitch).Tan();
 		}
 		else
 		{
 			dy = 0;
 		}
 
-		centeryfrac = (viewheight << (FRACBITS-1)) + dy;
-		centery = centeryfrac >> FRACBITS;
-		globaluclip = FixedDiv (-centeryfrac, InvZtoScale);
-		globaldclip = FixedDiv ((viewheight<<FRACBITS)-centeryfrac, InvZtoScale);
+		CenterY = (viewheight / 2.0) + dy;
+		centery = xs_ToInt(CenterY);
+		globaluclip = -CenterY / InvZtoScale;
+		globaldclip = (viewheight - CenterY) / InvZtoScale;
 
 		//centeryfrac &= 0xffff0000;
 		int e, i;
 
 		i = 0;
 		e = viewheight;
-		fixed_t focus = FocalLengthY;
-		fixed_t den;
+		float focus = float(FocalLengthY);
+		float den;
+		float cy = float(CenterY);
 		if (i < centery)
 		{
-			den = centeryfrac - (i << FRACBITS) - FRACUNIT/2;
+			den = cy - i - 0.5f;
 			if (e <= centery)
 			{
 				do {
-					yslope[i] = FixedDiv (focus, den);
-					den -= FRACUNIT;
+					yslope[i] = FLOAT2FIXED(focus / den);
+					den -= 1;
 				} while (++i < e);
 			}
 			else
 			{
 				do {
-					yslope[i] = FixedDiv (focus, den);
-					den -= FRACUNIT;
+					yslope[i] = FLOAT2FIXED(focus / den);
+					den -= 1;
 				} while (++i < centery);
-				den = (i << FRACBITS) - centeryfrac + FRACUNIT/2;
+				den = i - cy + 0.5f;
 				do {
-					yslope[i] = FixedDiv (focus, den);
-					den += FRACUNIT;
+					yslope[i] = FLOAT2FIXED(focus / den);
+					den += 1;
 				} while (++i < e);
 			}
 		}
 		else
 		{
-			den = (i << FRACBITS) - centeryfrac + FRACUNIT/2;
+			den = i - cy + 0.5f;
 			do {
-				yslope[i] = FixedDiv (focus, den);
-				den += FRACUNIT;
+				yslope[i] = FLOAT2FIXED(focus / den);
+				den += 1;
 			} while (++i < e);
 		}
 	}
@@ -688,10 +683,8 @@ void R_EnterPortal (PortalDrawseg* pds, int depth)
 		return;
 	}
 
-	angle_t startang = viewangle;
-	fixed_t startx = viewx;
-	fixed_t starty = viewy;
-	fixed_t startz = viewz;
+	DAngle startang = ViewAngle;
+	DVector3 startpos = ViewPos;
 	DVector3 savedpath[2] = { ViewPath[0], ViewPath[1] };
 	ActorRenderFlags savedvisibility = camera? camera->renderflags & RF_INVISIBLE : ActorRenderFlags::FromInt(0);
 
@@ -707,44 +700,40 @@ void R_EnterPortal (PortalDrawseg* pds, int depth)
 		// Reflect the current view behind the mirror.
 		if (pds->src->Delta().X == 0)
 		{ // vertical mirror
-			viewx = v1->fixX() - startx + v1->fixX();
+			ViewPos.X = v1->fX() - startpos.X + v1->fX();
 		}
 		else if (pds->src->Delta().Y == 0)
 		{ // horizontal mirror
-			viewy = v1->fixY() - starty + v1->fixY();
+			ViewPos.Y = v1->fY() - startpos.Y + v1->fY();
 		}
 		else
-		{ // any mirror--use floats to avoid integer overflow
+		{ // any mirror
 			vertex_t *v2 = pds->src->v2;
 
 			double dx = v2->fX() - v1->fX();
 			double dy = v2->fY() - v1->fY();
 			double x1 = v1->fX();
 			double y1 = v1->fY();
-			double x = FIXED2DBL(startx);
-			double y = FIXED2DBL(starty);
+			double x = startpos.X;
+			double y = startpos.Y;
 
 			// the above two cases catch len == 0
 			double r = ((x - x1)*dx + (y - y1)*dy) / (dx*dx + dy*dy);
 
-			viewx = FLOAT2FIXED((x1 + r * dx)*2 - x);
-			viewy = FLOAT2FIXED((y1 + r * dy)*2 - y);
+			ViewPos.X = (x1 + r * dx)*2 - x;
+			ViewPos.Y = (y1 + r * dy)*2 - y;
 		}
-		viewangle = pds->src->Delta().Angle().BAMs() - startang;
+		ViewAngle = pds->src->Delta().Angle() - startang;
 	}
 	else
 	{
-		DVector3 view(FIXED2DBL(viewx), FIXED2DBL(viewy), FIXED2DBL(viewz));
-		DAngle va = ANGLE2DBL(viewangle);
+		DVector3 view(ViewPos);
+		DAngle va = ViewAngle;
 		P_TranslatePortalXY(pds->src, view.X, view.Y);
 		P_TranslatePortalZ(pds->src, view.Z);
 		P_TranslatePortalAngle(pds->src, va);
 		P_TranslatePortalXY(pds->src, ViewPath[0].X, ViewPath[0].Y);
 		P_TranslatePortalXY(pds->src, ViewPath[1].X, ViewPath[1].Y);
-		viewx = FLOAT2FIXED(view.X);
-		viewy = FLOAT2FIXED(view.Y);
-		viewz = FLOAT2FIXED(view.Z);
-		viewangle = va.BAMs();
 
 		if (!r_showviewer && camera)
 		{
@@ -760,15 +749,15 @@ void R_EnterPortal (PortalDrawseg* pds, int depth)
 				}
 			}
 		}
+		ViewPos = view;
+		ViewAngle = va;
 	}
-	ViewAngle = AngleToFloat(viewangle);
-	ViewPos = { FIXED2DBL(viewx), FIXED2DBL(viewy), FIXED2DBL(viewz) };
 
-	viewsin = finesine[viewangle>>ANGLETOFINESHIFT];
-	viewcos = finecosine[viewangle>>ANGLETOFINESHIFT];
+	ViewSin = ViewAngle.Sin();
+	ViewCos = ViewAngle.Cos();
 
-	viewtansin = FixedMul (FocalTangent, viewsin);
-	viewtancos = FixedMul (FocalTangent, viewcos);
+	ViewTanSin = FocalTangent * ViewSin;
+	ViewTanCos = FocalTangent * ViewCos;
 
 	R_CopyStackedViewParameters();
 
@@ -809,7 +798,7 @@ void R_EnterPortal (PortalDrawseg* pds, int depth)
 	R_DrawPortals ();
 	PlaneCycles.Unclock();
 
-	fixed_t vzp = viewz;
+	double vzp = ViewPos.Z;
 
 	int prevuniq = CurrentPortalUniq;
 	// depth check is in another place right now
@@ -838,14 +827,10 @@ void R_EnterPortal (PortalDrawseg* pds, int depth)
 
 	CurrentPortal = prevpds;
 	MirrorFlags = prevmf;
-	viewangle = startang;
-	viewx = startx;
-	viewy = starty;
-	viewz = startz;
+	ViewAngle = startang;
+	ViewPos = startpos;
 	ViewPath[0] = savedpath[0];
 	ViewPath[1] = savedpath[1];
-	ViewAngle = AngleToFloat(viewangle);
-	ViewPos = { FIXED2DBL(viewx), FIXED2DBL(viewy), FIXED2DBL(viewz) };
 }
 
 //==========================================================================

src/r_main.h

@@ -35,22 +35,21 @@ typedef BYTE lighttable_t;	// This could be wider for >8 bit display.
 // POV related.
 //
 extern bool				bRenderingToCanvas;
-extern fixed_t			viewcos;
-extern fixed_t			viewsin;
+extern double			ViewCos;
+extern double			ViewSin;
 extern fixed_t			viewingrangerecip;
-extern fixed_t			FocalLengthX, FocalLengthY;
-extern float			FocalLengthXfloat;
-extern fixed_t			InvZtoScale;
+extern double			FocalLengthX, FocalLengthY;
+extern double			InvZtoScale;
 
-extern float			WallTMapScale2;
+extern double			WallTMapScale2;
 
 extern int				viewwindowx;
 extern int				viewwindowy;
 
-extern fixed_t			centerxfrac;
-extern fixed_t			centeryfrac;
-extern fixed_t			yaspectmul;
-extern float			iyaspectmulfloat;
+extern double			CenterX;
+extern double			CenterY;
+extern double			YaspectMul;
+extern double			IYaspectMul;
 
 extern FDynamicColormap*basecolormap;	// [RH] Colormap for sector currently being drawn
 
@@ -139,8 +138,8 @@ void R_MultiresInit (void);
 
 extern int stacked_extralight;
 extern float stacked_visibility;
-extern fixed_t stacked_viewx, stacked_viewy, stacked_viewz;
-extern angle_t stacked_angle;
+extern DVector3 stacked_viewpos;
+extern DAngle stacked_angle;
 
 extern void R_CopyStackedViewParameters();
 

src/r_plane.cpp

@@ -99,8 +99,8 @@ visplane_t 				*ceilingplane;
 // won't draw in skyboxes properly.
 int stacked_extralight;
 float stacked_visibility;
-fixed_t stacked_viewx, stacked_viewy, stacked_viewz;
-angle_t stacked_angle;
+DVector3 stacked_viewpos;
+DAngle stacked_angle;
 
 
 //
@@ -228,7 +228,7 @@ void R_MapPlane (int y, int x1)
 	{
 		// Determine lighting based on the span's distance from the viewer.
 		ds_colormap = basecolormap->Maps + (GETPALOOKUP (
-			FixedMul (GlobVis, abs (centeryfrac - (y << FRACBITS))), planeshade) << COLORMAPSHIFT);
+			xs_ToInt(GlobVis * fabs(CenterY - y)), planeshade) << COLORMAPSHIFT);
 	}
 
 #ifdef X86_ASM
@@ -640,9 +640,7 @@ visplane_t *R_FindPlane (const secplane_t &height, FTextureID picnum, int lightl
 				  // check even more.
 					if (check->extralight == stacked_extralight &&
 						check->visibility == stacked_visibility &&
-						check->viewx == stacked_viewx &&
-						check->viewy == stacked_viewy &&
-						check->viewz == stacked_viewz &&
+						check->viewpos == stacked_viewpos &&
 						(
 							// headache inducing logic... :(
 							(portal->mType != PORTS_STACKEDSECTORTHING) ||
@@ -689,9 +687,7 @@ visplane_t *R_FindPlane (const secplane_t &height, FTextureID picnum, int lightl
 			CurrentPortalUniq == check->CurrentPortalUniq &&
 			MirrorFlags == check->MirrorFlags &&
 			CurrentSkybox == check->CurrentSkybox &&
-			viewx == check->viewx &&
-			viewy == check->viewy &&
-			viewz == check->viewz
+			ViewPos == check->viewpos
 			)
 		{
 		  return check;
@@ -715,9 +711,7 @@ visplane_t *R_FindPlane (const secplane_t &height, FTextureID picnum, int lightl
 	check->right = 0;
 	check->extralight = stacked_extralight;
 	check->visibility = stacked_visibility;
-	check->viewx = stacked_viewx;
-	check->viewy = stacked_viewy;
-	check->viewz = stacked_viewz;
+	check->viewpos = stacked_viewpos;
 	check->viewangle = stacked_angle;
 	check->Alpha = alpha;
 	check->Additive = additive;
@@ -803,9 +797,7 @@ visplane_t *R_CheckPlane (visplane_t *pl, int start, int stop)
 		new_pl->portal = pl->portal;
 		new_pl->extralight = pl->extralight;
 		new_pl->visibility = pl->visibility;
-		new_pl->viewx = pl->viewx;
-		new_pl->viewy = pl->viewy;
-		new_pl->viewz = pl->viewz;
+		new_pl->viewpos = pl->viewpos;
 		new_pl->viewangle = pl->viewangle;
 		new_pl->sky = pl->sky;
 		new_pl->Alpha = pl->Alpha;
@@ -985,7 +977,7 @@ static void R_DrawSky (visplane_t *pl)
 
 static void R_DrawSkyStriped (visplane_t *pl)
 {
-	fixed_t centerysave = centeryfrac;
+	double centerysave = CenterY;
 	short drawheight = (short)MulScale16 (frontskytex->GetHeight(), frontyScale);
 	fixed_t topfrac;
 	fixed_t iscale = frontiScale;
@@ -995,7 +987,7 @@ static void R_DrawSkyStriped (visplane_t *pl)
 
 	// So that I don't have to worry about fractional precision, chop off the
 	// fractional part of centeryfrac.
-	centeryfrac = centery << FRACBITS;
+	CenterY = centery;
 	topfrac = (skymid + iscale * (1-centery)) % (frontskytex->GetHeight() << FRACBITS);
 	if (topfrac < 0) topfrac += frontskytex->GetHeight() << FRACBITS;
 	yl = 0;
@@ -1020,7 +1012,7 @@ static void R_DrawSkyStriped (visplane_t *pl)
 		yh += drawheight;
 		dc_texturemid = iscale * (centery-yl-1);
 	}
-	centeryfrac = centerysave;
+	CenterY = centerysave;
 }
 
 //==========================================================================
@@ -1060,15 +1052,15 @@ int R_DrawPlanes ()
 }
 
 // kg3D - draw all visplanes with "height"
-void R_DrawHeightPlanes(fixed_t height)
+void R_DrawHeightPlanes(double height)
 {
 	visplane_t *pl;
 	int i;
 
 	ds_color = 3;
 
-	fixed_t oViewX = viewx, oViewY = viewy, oViewZ = viewz;
-	angle_t oViewAngle = viewangle;
+	DVector3 oViewPos = ViewPos;
+	DAngle oViewAngle = ViewAngle;
 
 	for (i = 0; i < MAXVISPLANES; i++)
 	{
@@ -1078,24 +1070,15 @@ void R_DrawHeightPlanes(fixed_t height)
 			if(pl->CurrentSkybox != CurrentSkybox || pl->CurrentPortalUniq != CurrentPortalUniq)
 				continue;
 			if(pl->sky < 0 && pl->height.Zat0() == height) {
-				viewx = pl->viewx;
-				viewy = pl->viewy;
-				viewz = pl->viewz;
-				viewangle = pl->viewangle;
-				ViewAngle = AngleToFloat(viewangle);
-				ViewPos = { FIXED2DBL(viewx), FIXED2DBL(viewy), FIXED2DBL(viewz) };
+				ViewPos = pl->viewpos;
+				ViewAngle = pl->viewangle;
 				MirrorFlags = pl->MirrorFlags;
 				R_DrawSinglePlane (pl, pl->sky & 0x7FFFFFFF, pl->Additive, true);
 			}
 		}
 	}
-
-	viewx = oViewX;
-	viewy = oViewY;
-	viewz = oViewZ;
-	viewangle = oViewAngle;
-	ViewAngle = AngleToFloat(viewangle);
-	ViewPos = { FIXED2DBL(viewx), FIXED2DBL(viewy), FIXED2DBL(viewz) };
+	ViewPos = oViewPos;
+	ViewAngle = oViewAngle;
 }
 
 
@@ -1186,7 +1169,7 @@ void R_DrawPortals ()
 	static TArray<size_t> interestingStack;
 	static TArray<ptrdiff_t> drawsegStack;
 	static TArray<ptrdiff_t> visspriteStack;
-	static TArray<fixed_t> viewxStack, viewyStack, viewzStack;
+	static TArray<DVector3> viewposStack;
 	static TArray<visplane_t *> visplaneStack;
 
 	numskyboxes = 0;
@@ -1198,10 +1181,8 @@ void R_DrawPortals ()
 	CurrentPortalInSkybox = true;
 
 	int savedextralight = extralight;
-	fixed_t savedx = viewx;
-	fixed_t savedy = viewy;
-	fixed_t savedz = viewz;
-	angle_t savedangle = viewangle;
+	DVector3 savedpos = ViewPos;
+	DAngle savedangle = ViewAngle;
 	ptrdiff_t savedvissprite_p = vissprite_p - vissprites;
 	ptrdiff_t savedds_p = ds_p - drawsegs;
 	ptrdiff_t savedlastopening = lastopening;
@@ -1241,11 +1222,8 @@ void R_DrawPortals ()
 			extralight = 0;
 			R_SetVisibility(sky->args[0] * 0.25f);
 
-			DVector3 viewpos = sky->InterpolatedPosition(r_TicFracF);
-			viewx = FLOAT2FIXED(viewpos.X);
-			viewy = FLOAT2FIXED(viewpos.Y);
-			viewz = FLOAT2FIXED(viewpos.Z);
-			viewangle = savedangle + (sky->PrevAngles.Yaw + deltaangle(sky->PrevAngles.Yaw, sky->Angles.Yaw) * r_TicFracF).BAMs();
+			ViewPos = sky->InterpolatedPosition(r_TicFracF);
+			ViewAngle = savedangle + (sky->PrevAngles.Yaw + deltaangle(sky->PrevAngles.Yaw, sky->Angles.Yaw) * r_TicFracF);
 
 			R_CopyStackedViewParameters();
 			break;
@@ -1256,10 +1234,10 @@ void R_DrawPortals ()
 		case PORTS_LINKEDPORTAL:
 			extralight = pl->extralight;
 			R_SetVisibility (pl->visibility);
-			viewx = pl->viewx + FLOAT2FIXED(port->mDisplacement.X);
-			viewy = pl->viewy + FLOAT2FIXED(port->mDisplacement.Y);
-			viewz = pl->viewz;
-			viewangle = pl->viewangle;
+			ViewPos.X = pl->viewpos.X + port->mDisplacement.X;
+			ViewPos.Y = pl->viewpos.Y + port->mDisplacement.Y;
+			ViewPos.Z = pl->viewpos.Z;
+			ViewAngle = pl->viewangle;
 			break;
 
 		case PORTS_HORIZON:
@@ -1274,9 +1252,6 @@ void R_DrawPortals ()
 			continue;
 		}
 
-		ViewAngle = AngleToFloat(viewangle);
-		ViewPos = { FIXED2DBL(viewx), FIXED2DBL(viewy), FIXED2DBL(viewz) };
-
 		port->mFlags |= PORTSF_INSKYBOX;
 		if (port->mPartner > 0) sectorPortals[port->mPartner].mFlags |= PORTSF_INSKYBOX;
 		camera = NULL;
@@ -1332,9 +1307,7 @@ void R_DrawPortals ()
 		drawsegStack.Push (diffnum);
 		diffnum = firstvissprite - vissprites;
 		visspriteStack.Push (diffnum);
-		viewxStack.Push (viewx);
-		viewyStack.Push (viewy);
-		viewzStack.Push (viewz);
+		viewposStack.Push(ViewPos);
 		visplaneStack.Push (pl);
 
 		InSubsector = NULL;
@@ -1357,9 +1330,9 @@ void R_DrawPortals ()
 		firstdrawseg = drawsegs + pd;
 		visspriteStack.Pop (pd);
 		firstvissprite = vissprites + pd;
-		viewxStack.Pop (viewx);	// Masked textures and planes need the view
-		viewyStack.Pop (viewy); // coordinates restored for proper positioning.
-		viewzStack.Pop (viewz);
+
+		// Masked textures and planes need the view coordinates restored for proper positioning.
+		viewposStack.Pop(ViewPos);
 
 		R_DrawMasked ();
 
@@ -1385,14 +1358,10 @@ void R_DrawPortals ()
 
 	camera = savedcamera;
 	viewsector = savedsector;
-	viewx = savedx;
-	viewy = savedy;
-	viewz = savedz;
+	ViewPos = savedpos;
 	R_SetVisibility (savedvisibility);
 	extralight = savedextralight;
-	viewangle = savedangle;
-	ViewAngle = AngleToFloat(viewangle);
-	ViewPos = { FIXED2DBL(viewx), FIXED2DBL(viewy), FIXED2DBL(viewz) };
+	ViewAngle = savedangle;
 	R_SetViewAngle ();
 
 	CurrentPortalInSkybox = false;
@@ -1432,7 +1401,7 @@ void R_DrawSkyPlane (visplane_t *pl)
 	}
 	sky2tex = sky2texture;
 	skymid = skytexturemid;
-	skyangle = viewangle;
+	skyangle = ViewAngle.BAMs();
 
 	if (pl->picnum == skyflatnum)
 	{
@@ -1560,23 +1529,23 @@ void R_DrawNormalPlane (visplane_t *pl, fixed_t alpha, bool additive, bool maske
 		double rad = planeang * (M_PI / ANGLE_180);
 		double cosine = cos(rad), sine = sin(rad);
 
-		pviewx = xs_RoundToInt(pl->xoffs + viewx * cosine - viewy * sine);
-		pviewy = xs_RoundToInt(pl->yoffs - viewx * sine - viewy * cosine);
+		pviewx = xs_RoundToInt(pl->xoffs + FLOAT2FIXED(ViewPos.X * cosine - ViewPos.Y * sine));
+		pviewy = xs_RoundToInt(pl->yoffs - FLOAT2FIXED(ViewPos.X * sine - ViewPos.Y * cosine));
 	}
 	else
 	{
-		pviewx = pl->xoffs + viewx;
-		pviewy = pl->yoffs - viewy;
+		pviewx = pl->xoffs + FLOAT2FIXED(ViewPos.X);
+		pviewy = pl->yoffs - FLOAT2FIXED(ViewPos.Y);
 	}
 
 	pviewx = FixedMul (xscale, pviewx);
 	pviewy = FixedMul (yscale, pviewy);
 	
 	// left to right mapping
-	planeang = (viewangle - ANG90 + planeang) >> ANGLETOFINESHIFT;
+	planeang = (ViewAngle.BAMs() - ANG90 + planeang) >> ANGLETOFINESHIFT;
 	// Scale will be unit scale at FocalLengthX (normally SCREENWIDTH/2) distance
-	xstepscale = Scale (xscale, finecosine[planeang], FocalLengthX);
-	ystepscale = Scale (yscale, -finesine[planeang], FocalLengthX);
+	xstepscale = fixed_t(FixedMul(xscale, finecosine[planeang]) / FocalLengthX);
+	ystepscale = fixed_t(FixedMul(yscale, -finesine[planeang]) / FocalLengthX);
 
 	// [RH] flip for mirrors
 	if (MirrorFlags & RF_XFLIP)
@@ -1590,7 +1559,7 @@ void R_DrawNormalPlane (visplane_t *pl, fixed_t alpha, bool additive, bool maske
 	basexfrac = FixedMul (xscale, finecosine[planeang]) + x*xstepscale;
 	baseyfrac = FixedMul (yscale, -finesine[planeang]) + x*ystepscale;
 
-	planeheight = abs (pl->height.Zat0() - viewz);
+	planeheight = FLOAT2FIXED(fabs(pl->height.Zat0() - ViewPos.Z));
 
 	GlobVis = FixedDiv (r_FloorVisibility, planeheight);
 	if (fixedlightlev >= 0)
@@ -1678,15 +1647,11 @@ void R_DrawTiltedPlane (visplane_t *pl, fixed_t alpha, bool additive, bool maske
 		return;
 	}
 
-	double vx = FIXED2DBL(viewx);
-	double vy = FIXED2DBL(viewy);
-	double vz = FIXED2DBL(viewz);
-
 	lxscale = FIXED2DBL(pl->xscale) * ifloatpow2[ds_xbits];
 	lyscale = FIXED2DBL(pl->yscale) * ifloatpow2[ds_ybits];
 	xscale = 64.f / lxscale;
 	yscale = 64.f / lyscale;
-	zeroheight = pl->height.ZatPoint(vx, vy);
+	zeroheight = pl->height.ZatPoint(ViewPos);
 
 	pviewx = MulScale (pl->xoffs, pl->xscale, ds_xbits);
 	pviewy = MulScale (pl->yoffs, pl->yscale, ds_ybits);
@@ -1694,13 +1659,13 @@ void R_DrawTiltedPlane (visplane_t *pl, fixed_t alpha, bool additive, bool maske
 	// p is the texture origin in view space
 	// Don't add in the offsets at this stage, because doing so can result in
 	// errors if the flat is rotated.
-	ang = (ANG270 - viewangle) * (M_PI / ANGLE_180);
-	p[0] = vx * cos(ang) - vy * sin(ang);
-	p[2] = vx * sin(ang) + vy * cos(ang);
-	p[1] = pl->height.ZatPoint(0.0, 0.0) - vz;
+	ang = (DAngle(270.) - ViewAngle).Radians();
+	p[0] = ViewPos.X * cos(ang) - ViewPos.Y * sin(ang);
+	p[2] = ViewPos.X * sin(ang) + ViewPos.Y * cos(ang);
+	p[1] = pl->height.ZatPoint(0.0, 0.0) - ViewPos.Z;
 
 	// m is the v direction vector in view space
-	ang = (ANG180 - viewangle - pl->angle) * (M_PI / ANGLE_180);
+	ang = (DAngle(180.) - ViewAngle).Radians();
 	m[0] = yscale * cos(ang);
 	m[2] = yscale * sin(ang);
 //	m[1] = pl->height.ZatPointF (0, iyscale) - pl->height.ZatPointF (0,0));
@@ -1717,21 +1682,21 @@ void R_DrawTiltedPlane (visplane_t *pl, fixed_t alpha, bool additive, bool maske
 	// how much you slope the surface. Use the commented-out code above instead to keep
 	// the textures a constant size across the surface's plane instead.
 	ang = pl->angle * (M_PI / ANGLE_180);
-	m[1] = pl->height.ZatPoint(vx + yscale * sin(ang), vy + yscale * cos(ang)) - zeroheight;
+	m[1] = pl->height.ZatPoint(ViewPos.X + yscale * sin(ang), ViewPos.Y + yscale * cos(ang)) - zeroheight;
 	ang += PI/2;
-	n[1] = pl->height.ZatPoint(vx + xscale * sin(ang), vy + xscale * cos(ang)) - zeroheight;
+	n[1] = pl->height.ZatPoint(ViewPos.X + xscale * sin(ang), ViewPos.Y + xscale * cos(ang)) - zeroheight;
 
 	plane_su = p ^ m;
 	plane_sv = p ^ n;
 	plane_sz = m ^ n;
 
-	plane_su.Z *= FocalLengthXfloat;
-	plane_sv.Z *= FocalLengthXfloat;
-	plane_sz.Z *= FocalLengthXfloat;
+	plane_su.Z *= FocalLengthX;
+	plane_sv.Z *= FocalLengthX;
+	plane_sz.Z *= FocalLengthX;
 
-	plane_su.Y *= iyaspectmulfloat;
-	plane_sv.Y *= iyaspectmulfloat;
-	plane_sz.Y *= iyaspectmulfloat;
+	plane_su.Y *= IYaspectMul;
+	plane_sv.Y *= IYaspectMul;
+	plane_sz.Y *= IYaspectMul;
 
 	// Premultiply the texture vectors with the scale factors
 	plane_su *= 4294967296.f;
@@ -1744,7 +1709,7 @@ void R_DrawTiltedPlane (visplane_t *pl, fixed_t alpha, bool additive, bool maske
 		plane_sz[0] = -plane_sz[0];
 	}
 
-	planelightfloat = (r_TiltVisibility * lxscale * lyscale) / (fabs(pl->height.ZatPoint(FIXED2DBL(viewx), FIXED2DBL(viewy)) - FIXED2DBL(viewz))) / 65536.0;
+	planelightfloat = (r_TiltVisibility * lxscale * lyscale) / (fabs(pl->height.ZatPoint(ViewPos)) / 65536.0);
 
 	if (pl->height.fC() > 0)
 		planelightfloat = -planelightfloat;

src/r_plane.h

@@ -51,8 +51,8 @@ struct visplane_s
 	// stack, then they are unused.
 	int			extralight;
 	float		visibility;
-	fixed_t		viewx, viewy, viewz;
-	angle_t		viewangle;
+	DVector3	viewpos;
+	DAngle		viewangle;
 	fixed_t		Alpha;
 	bool		Additive;
 

src/r_segs.cpp

@@ -64,7 +64,7 @@ CVAR(Bool, r_np2, true, 0)
 #define HEIGHTBITS 12
 #define HEIGHTSHIFT (FRACBITS-HEIGHTBITS)
 
-extern fixed_t globaluclip, globaldclip;
+extern double globaluclip, globaldclip;
 
 PortalDrawseg* CurrentPortal = NULL;
 int CurrentPortalUniq = 0;
@@ -93,7 +93,7 @@ short	wallupper[MAXWIDTH];
 short	walllower[MAXWIDTH];
 fixed_t	swall[MAXWIDTH];
 fixed_t	lwall[MAXWIDTH];
-fixed_t	lwallscale;
+double	lwallscale;
 
 //
 // regular wall
@@ -114,7 +114,7 @@ fixed_t			rw_light;		// [RH] Scale lights with viewsize adjustments
 fixed_t			rw_lightstep;
 fixed_t			rw_lightleft;
 
-static fixed_t	rw_frontlowertop;
+static double	rw_frontlowertop;
 
 static int		rw_x;
 static int		rw_stopx;
@@ -123,12 +123,12 @@ static fixed_t	rw_scalestep;
 static fixed_t	rw_midtexturemid;
 static fixed_t	rw_toptexturemid;
 static fixed_t	rw_bottomtexturemid;
-static fixed_t	rw_midtexturescalex;
-static fixed_t	rw_midtexturescaley;
-static fixed_t	rw_toptexturescalex;
-static fixed_t	rw_toptexturescaley;
-static fixed_t	rw_bottomtexturescalex;
-static fixed_t	rw_bottomtexturescaley;
+static double	rw_midtexturescalex;
+static double	rw_midtexturescaley;
+static double	rw_toptexturescalex;
+static double	rw_toptexturescaley;
+static double	rw_bottomtexturescalex;
+static double	rw_bottomtexturescaley;
 
 FTexture		*rw_pic;
 
@@ -182,9 +182,9 @@ static void BlastMaskedColumn (void (*blastfunc)(const BYTE *pixels, const FText
 
 	dc_iscale = MulScale18 (MaskedSWall[dc_x], MaskedScaleY);
  	if (sprflipvert)
-		sprtopscreen = centeryfrac + FixedMul(dc_texturemid, spryscale);
+		sprtopscreen = FLOAT2FIXED(CenterY) + FixedMul(dc_texturemid, spryscale);
 	else
-		sprtopscreen = centeryfrac - FixedMul(dc_texturemid, spryscale);
+		sprtopscreen = FLOAT2FIXED(CenterY) - FixedMul(dc_texturemid, spryscale);
 	
 	// killough 1/25/98: here's where Medusa came in, because
 	// it implicitly assumed that the column was all one patch.
@@ -228,7 +228,7 @@ void R_RenderMaskedSegRange (drawseg_t *ds, int x1, int x2)
 	FTexture	*tex;
 	int			i;
 	sector_t	tempsec;		// killough 4/13/98
-	fixed_t		texheight, texheightscale;
+	double		texheight, texheightscale;
 	bool		notrelevant = false;
 	fixed_t		rowoffset;
 
@@ -274,7 +274,7 @@ void R_RenderMaskedSegRange (drawseg_t *ds, int x1, int x2)
 	{
 		if (!(fake3D & FAKE3D_CLIPTOP))
 		{
-			sclipTop = sec->ceilingplane.ZatPointFixed(viewx, viewy);
+			sclipTop = sec->ceilingplane.ZatPoint(ViewPos);
 		}
 		for (i = frontsector->e->XFloor.lightlist.Size() - 1; i >= 0; i--)
 		{
@@ -317,19 +317,19 @@ void R_RenderMaskedSegRange (drawseg_t *ds, int x1, int x2)
 		dc_colormap = fixedcolormap;
 
 	// find positioning
-	texheight = tex->GetScaledHeight() << FRACBITS;
-	texheightscale = abs(curline->sidedef->GetTextureYScale(side_t::mid));
-	if (texheightscale != FRACUNIT)
+	texheight = tex->GetScaledHeightDouble();
+	texheightscale = fabs(curline->sidedef->GetTextureYScaleF(side_t::mid));
+	if (texheightscale != 1)
 	{
-		texheight = FixedDiv(texheight, texheightscale);
+		texheight = texheight / texheightscale;
 	}
 	if (curline->linedef->flags & ML_DONTPEGBOTTOM)
 	{
-		dc_texturemid = MAX (frontsector->GetPlaneTexZ(sector_t::floor), backsector->GetPlaneTexZ(sector_t::floor)) + texheight;
+		dc_texturemid = FLOAT2FIXED(MAX(frontsector->GetPlaneTexZF(sector_t::floor), backsector->GetPlaneTexZF(sector_t::floor)) + texheight);
 	}
 	else
 	{
-		dc_texturemid = MIN (frontsector->GetPlaneTexZ(sector_t::ceiling), backsector->GetPlaneTexZ(sector_t::ceiling));
+		dc_texturemid = FLOAT2FIXED(MIN(frontsector->GetPlaneTexZF(sector_t::ceiling), backsector->GetPlaneTexZF(sector_t::ceiling)));
 	}
 
 	rowoffset = curline->sidedef->GetTextureYOffset(side_t::mid);
@@ -337,7 +337,7 @@ void R_RenderMaskedSegRange (drawseg_t *ds, int x1, int x2)
 	if (!(curline->linedef->flags & ML_WRAP_MIDTEX) &&
 		!(curline->sidedef->Flags & WALLF_WRAP_MIDTEX))
 	{ // Texture does not wrap vertically.
-		fixed_t textop;
+		double textop;
 
 		if (MaskedScaleY < 0)
 		{
@@ -348,16 +348,16 @@ void R_RenderMaskedSegRange (drawseg_t *ds, int x1, int x2)
 		{
 			// rowoffset is added before the MulScale3 so that the masked texture will
 			// still be positioned in world units rather than texels.
-			dc_texturemid += rowoffset - viewz;
-			textop = dc_texturemid;
+			dc_texturemid += rowoffset - FLOAT2FIXED(ViewPos.Z);
+			textop = FIXED2FLOAT(dc_texturemid);
 			dc_texturemid = MulScale16 (dc_texturemid, MaskedScaleY);
 		}
 		else
 		{
 			// rowoffset is added outside the multiply so that it positions the texture
 			// by texels instead of world units.
-			textop = dc_texturemid - viewz + SafeDivScale16 (rowoffset, MaskedScaleY);
-			dc_texturemid = MulScale16 (dc_texturemid - viewz, MaskedScaleY) + rowoffset;
+			textop = FIXED2FLOAT(dc_texturemid + SafeDivScale16 (rowoffset, MaskedScaleY)) - ViewPos.Z;
+			dc_texturemid = MulScale16 (dc_texturemid - FLOAT2FIXED(ViewPos.Z), MaskedScaleY) + rowoffset;
 		}
 		if (sprflipvert)
 		{
@@ -366,24 +366,22 @@ void R_RenderMaskedSegRange (drawseg_t *ds, int x1, int x2)
 		}
 
 		// [RH] Don't bother drawing segs that are completely offscreen
-		if (MulScale12 (globaldclip, ds->sz1) < -textop &&
-			MulScale12 (globaldclip, ds->sz2) < -textop)
+		if (globaldclip * ds->sz1 < -textop && globaldclip * ds->sz2 < -textop)
 		{ // Texture top is below the bottom of the screen
 			goto clearfog;
 		}
 
-		if (MulScale12 (globaluclip, ds->sz1) > texheight - textop &&
-			MulScale12 (globaluclip, ds->sz2) > texheight - textop)
+		if (globaluclip * ds->sz1 > texheight - textop && globaluclip * ds->sz2 > texheight - textop)
 		{ // Texture bottom is above the top of the screen
 			goto clearfog;
 		}
 
-		if ((fake3D & FAKE3D_CLIPBOTTOM) && textop < sclipBottom - viewz)
+		if ((fake3D & FAKE3D_CLIPBOTTOM) && textop < sclipBottom - ViewPos.Z)
 		{
 			notrelevant = true;
 			goto clearfog;
 		}
-		if ((fake3D & FAKE3D_CLIPTOP) && textop - texheight > sclipTop - viewz)
+		if ((fake3D & FAKE3D_CLIPTOP) && textop - texheight > sclipTop - ViewPos.Z)
 		{
 			notrelevant = true;
 			goto clearfog;
@@ -396,7 +394,7 @@ void R_RenderMaskedSegRange (drawseg_t *ds, int x1, int x2)
 
 		if (fake3D & FAKE3D_CLIPTOP)
 		{
-			OWallMost(wallupper, textop < sclipTop - viewz ? textop : sclipTop - viewz, &WallC);
+			OWallMost(wallupper, textop < sclipTop - ViewPos.Z ? textop : sclipTop - ViewPos.Z, &WallC);
 		}
 		else
 		{
@@ -404,7 +402,7 @@ void R_RenderMaskedSegRange (drawseg_t *ds, int x1, int x2)
 		}
 		if (fake3D & FAKE3D_CLIPBOTTOM)
 		{
-			OWallMost(walllower, textop - texheight > sclipBottom - viewz ? textop - texheight : sclipBottom - viewz, &WallC);
+			OWallMost(walllower, textop - texheight > sclipBottom - ViewPos.Z ? textop - texheight : sclipBottom - ViewPos.Z, &WallC);
 		}
 		else
 		{
@@ -484,14 +482,14 @@ void R_RenderMaskedSegRange (drawseg_t *ds, int x1, int x2)
 		{
 			// rowoffset is added before the MulScale3 so that the masked texture will
 			// still be positioned in world units rather than texels.
-			dc_texturemid += rowoffset - viewz;
+			dc_texturemid += rowoffset - FLOAT2FIXED(ViewPos.Z);
 			dc_texturemid = MulScale16 (dc_texturemid, MaskedScaleY);
 		}
 		else
 		{
 			// rowoffset is added outside the multiply so that it positions the texture
 			// by texels instead of world units.
-			dc_texturemid = MulScale16 (dc_texturemid - viewz, MaskedScaleY) + rowoffset;
+			dc_texturemid = MulScale16 (dc_texturemid - FLOAT2FIXED(ViewPos.Z), MaskedScaleY) + rowoffset;
 		}
 
 		WallC.sz1 = ds->sz1;
@@ -512,7 +510,7 @@ void R_RenderMaskedSegRange (drawseg_t *ds, int x1, int x2)
 
 		if (fake3D & FAKE3D_CLIPTOP)
 		{
-			OWallMost(wallupper, sclipTop - viewz, &WallC);
+			OWallMost(wallupper, sclipTop - ViewPos.Z, &WallC);
 			for (i = x1; i < x2; i++)
 			{
 				if (wallupper[i] < mceilingclip[i])
@@ -522,7 +520,7 @@ void R_RenderMaskedSegRange (drawseg_t *ds, int x1, int x2)
 		}
 		if (fake3D & FAKE3D_CLIPBOTTOM)
 		{
-			OWallMost(walllower, sclipBottom - viewz, &WallC);
+			OWallMost(walllower, sclipBottom - ViewPos.Z, &WallC);
 			for (i = x1; i < x2; i++)
 			{
 				if (walllower[i] > mfloorclip[i])
@@ -561,7 +559,8 @@ clearfog:
 void R_RenderFakeWall(drawseg_t *ds, int x1, int x2, F3DFloor *rover)
 {
 	int i;
-	fixed_t xscale, yscale;
+	fixed_t xscale;
+	double yscale;
 
 	fixed_t Alpha = Scale(rover->alpha, OPAQUE, 255);
 	ESPSResult drawmode;
@@ -602,28 +601,29 @@ void R_RenderFakeWall(drawseg_t *ds, int x1, int x2, F3DFloor *rover)
 		scaledpart = side_t::mid;
 	}
 	xscale = fixed_t(rw_pic->Scale.X * scaledside->GetTextureXScale(scaledpart));
-	yscale = fixed_t(rw_pic->Scale.Y * scaledside->GetTextureYScale(scaledpart));
+	yscale = rw_pic->Scale.Y * scaledside->GetTextureYScale(scaledpart);
 
 	fixed_t rowoffset = curline->sidedef->GetTextureYOffset(side_t::mid) + rover->master->sidedef[0]->GetTextureYOffset(side_t::mid);
-	dc_texturemid = rover->model->GetPlaneTexZ(sector_t::ceiling);
+	double planez = rover->model->GetPlaneTexZF(sector_t::ceiling);
 	rw_offset = curline->sidedef->GetTextureXOffset(side_t::mid) + rover->master->sidedef[0]->GetTextureXOffset(side_t::mid);
 	if (rowoffset < 0)
 	{
 		rowoffset += rw_pic->GetHeight() << FRACBITS;
 	}
+	dc_texturemid = FLOAT2FIXED((planez - ViewPos.Z) * yscale);
 	if (rw_pic->bWorldPanning)
 	{
 		// rowoffset is added before the MulScale3 so that the masked texture will
 		// still be positioned in world units rather than texels.
 
-		dc_texturemid = MulScale16(dc_texturemid - viewz + rowoffset, yscale);
-		rw_offset = MulScale16 (rw_offset, xscale);
+		dc_texturemid += xs_FloorToInt(rowoffset * yscale);
+		rw_offset = MulScale16 (rw_offset, xscale);	///Is this really supposed to be xscale and not yscale?
 	}
 	else
 	{
 		// rowoffset is added outside the multiply so that it positions the texture
 		// by texels instead of world units.
-		dc_texturemid = MulScale16(dc_texturemid - viewz, yscale) + rowoffset;
+		dc_texturemid += rowoffset;
 	}
 
 	if (fixedlightlev >= 0)
@@ -635,14 +635,14 @@ void R_RenderFakeWall(drawseg_t *ds, int x1, int x2, F3DFloor *rover)
 	WallC.sz2 = ds->sz2;
 	WallC.sx1 = ds->sx1;
 	WallC.sx2 = ds->sx2;
-	WallC.tx1 = ds->cx;
-	WallC.ty1 = ds->cy;
-	WallC.tx2 = ds->cx + ds->cdx;
-	WallC.ty2 = ds->cy + ds->cdy;
+	WallC.tleft.X = ds->cx;
+	WallC.tleft.Y = ds->cy;
+	WallC.tright.X = ds->cx + ds->cdx;
+	WallC.tright.Y = ds->cy + ds->cdy;
 	WallT = ds->tmapvals;
 
-	OWallMost(wallupper, sclipTop - viewz, &WallC);
-	OWallMost(walllower, sclipBottom - viewz, &WallC);
+	OWallMost(wallupper, sclipTop - ViewPos.Z, &WallC);
+	OWallMost(walllower, sclipBottom - ViewPos.Z, &WallC);
 
 	for (i = x1; i < x2; i++)
 	{
@@ -656,7 +656,7 @@ void R_RenderFakeWall(drawseg_t *ds, int x1, int x2, F3DFloor *rover)
 	}
 
 	PrepLWall (lwall, curline->sidedef->TexelLength*xscale, ds->sx1, ds->sx2);
-	wallscan_np2_ds(ds, x1, x2, wallupper, walllower, MaskedSWall, lwall, yscale);
+	wallscan_np2_ds(ds, x1, x2, wallupper, walllower, MaskedSWall, lwall, FLOAT2FIXED(yscale));
 	R_FinishSetPatchStyle();
 }
 
@@ -1104,6 +1104,7 @@ void wallscan (int x1, int x2, short *uwal, short *dwal, fixed_t *swal, fixed_t
 	texturemid = dc_texturemid << (16 - shiftval);
 	xoffset = rw_offset;
 	basecolormapdata = basecolormap->Maps;
+	fixed_t centeryfrac = FLOAT2FIXED(CenterY);
 
 	x = x1;
 	//while ((umost[x] > dmost[x]) && (x < x2)) x++;
@@ -1316,7 +1317,7 @@ static void call_wallscan(int x1, int x2, short *uwal, short *dwal, fixed_t *swa
 //
 //=============================================================================
 
-void wallscan_np2(int x1, int x2, short *uwal, short *dwal, fixed_t *swal, fixed_t *lwal, fixed_t yrepeat, fixed_t top, fixed_t bot, bool mask)
+void wallscan_np2(int x1, int x2, short *uwal, short *dwal, fixed_t *swal, fixed_t *lwal, fixed_t yrepeat, fixed_t itop, fixed_t ibot, bool mask)
 {
 	if (!r_np2)
 	{
@@ -1327,18 +1328,24 @@ void wallscan_np2(int x1, int x2, short *uwal, short *dwal, fixed_t *swal, fixed
 		short most1[MAXWIDTH], most2[MAXWIDTH], most3[MAXWIDTH];
 		short *up, *down;
 		fixed_t texheight = rw_pic->GetHeight() << FRACBITS;
-		fixed_t scaledtexheight = FixedDiv(texheight, yrepeat);
-		fixed_t partition;
+		double scaledtexheight = FIXED2FLOAT(FixedDiv(texheight, yrepeat));
+		double partition;
+		double top = FIXED2FLOAT(itop);
+		double bot = FIXED2FLOAT(ibot);
 
 		if (yrepeat >= 0)
 		{ // normal orientation: draw strips from top to bottom
-			partition = top - (top - FixedDiv(dc_texturemid, yrepeat) - viewz) % scaledtexheight;
+			partition = top - fmod(top - FIXED2FLOAT(FixedDiv(dc_texturemid, yrepeat)) - ViewPos.Z, scaledtexheight);
+			if (partition == top)
+			{
+				partition -= scaledtexheight;
+			}
 			up = uwal;
 			down = most1;
-			dc_texturemid = FixedMul(partition - viewz, yrepeat) + texheight;
+			dc_texturemid = xs_RoundToInt((partition - ViewPos.Z) * yrepeat + texheight);
 			while (partition > bot)
 			{
-				int j = OWallMost(most3, partition - viewz, &WallC);
+				int j = OWallMost(most3, partition - ViewPos.Z, &WallC);
 				if (j != 3)
 				{
 					for (int j = x1; j < x2; ++j)
@@ -1356,13 +1363,13 @@ void wallscan_np2(int x1, int x2, short *uwal, short *dwal, fixed_t *swal, fixed
 		}
 		else
 		{ // upside down: draw strips from bottom to top
-			partition = bot - (bot - FixedDiv(dc_texturemid, yrepeat) - viewz) % scaledtexheight;
+			partition = bot - fmod(bot - FIXED2FLOAT(FixedDiv(dc_texturemid, yrepeat)) - ViewPos.Z, scaledtexheight);
 			up = most1;
 			down = dwal;
-			dc_texturemid = FixedMul(partition - viewz, yrepeat) + texheight;
+			dc_texturemid = xs_RoundToInt((partition - ViewPos.Z) * yrepeat + texheight);
 			while (partition < top)
 			{
-				int j = OWallMost(most3, partition - viewz, &WallC);
+				int j = OWallMost(most3, partition - ViewPos.Z, &WallC);
 				if (j != 12)
 				{
 					for (int j = x1; j < x2; ++j)
@@ -1385,12 +1392,12 @@ static void wallscan_np2_ds(drawseg_t *ds, int x1, int x2, short *uwal, short *d
 {
 	if (rw_pic->GetHeight() != 1 << rw_pic->HeightBits)
 	{
-		fixed_t frontcz1 = ds->curline->frontsector->ceilingplane.ZatPointFixed(ds->curline->v1);
-		fixed_t frontfz1 = ds->curline->frontsector->floorplane.ZatPointFixed(ds->curline->v1);
-		fixed_t frontcz2 = ds->curline->frontsector->ceilingplane.ZatPointFixed(ds->curline->v2);
-		fixed_t frontfz2 = ds->curline->frontsector->floorplane.ZatPointFixed(ds->curline->v2);
-		fixed_t top = MAX(frontcz1, frontcz2);
-		fixed_t bot = MIN(frontfz1, frontfz2);
+		double frontcz1 = ds->curline->frontsector->ceilingplane.ZatPoint(ds->curline->v1);
+		double frontfz1 = ds->curline->frontsector->floorplane.ZatPoint(ds->curline->v1);
+		double frontcz2 = ds->curline->frontsector->ceilingplane.ZatPoint(ds->curline->v2);
+		double frontfz2 = ds->curline->frontsector->floorplane.ZatPoint(ds->curline->v2);
+		double top = MAX(frontcz1, frontcz2);
+		double bot = MIN(frontfz1, frontfz2);
 		if (fake3D & FAKE3D_CLIPTOP)
 		{
 			top = MIN(top, sclipTop);
@@ -1399,7 +1406,7 @@ static void wallscan_np2_ds(drawseg_t *ds, int x1, int x2, short *uwal, short *d
 		{
 			bot = MAX(bot, sclipBottom);
 		}
-		wallscan_np2(x1, x2, uwal, dwal, swal, lwal, yrepeat, top, bot, true);
+		wallscan_np2(x1, x2, uwal, dwal, swal, lwal, yrepeat, FLOAT2FIXED(top), FLOAT2FIXED(bot), true);
 	}
 	else
 	{
@@ -1450,6 +1457,7 @@ void maskwallscan (int x1, int x2, short *uwal, short *dwal, fixed_t *swal, fixe
 	texturemid = dc_texturemid << (16 - shiftval);
 	xoffset = rw_offset;
 	basecolormapdata = basecolormap->Maps;
+	fixed_t centeryfrac = FLOAT2FIXED(CenterY);
 
 	x = startx = x1;
 	p = x + dc_destorg;
@@ -1623,6 +1631,7 @@ void transmaskwallscan (int x1, int x2, short *uwal, short *dwal, fixed_t *swal,
 	texturemid = dc_texturemid << (16 - shiftval);
 	xoffset = rw_offset;
 	basecolormapdata = basecolormap->Maps;
+	fixed_t centeryfrac = FLOAT2FIXED(CenterY);
 
 	x = startx = x1;
 	p = x + dc_destorg;
@@ -1769,7 +1778,8 @@ void R_RenderSegLoop ()
 	int x1 = rw_x;
 	int x2 = rw_stopx;
 	int x;
-	fixed_t xscale, yscale;
+	double xscale;
+	fixed_t yscale;
 	fixed_t xoffset = rw_offset;
 
 	if (fixedlightlev >= 0)
@@ -1858,8 +1868,8 @@ void R_RenderSegLoop ()
 		{
 			dc_texturemid = rw_midtexturemid;
 			rw_pic = midtexture;
-			xscale = fixed_t(rw_pic->Scale.X * rw_midtexturescalex);
-			yscale = fixed_t(rw_pic->Scale.Y * rw_midtexturescaley);
+			xscale = rw_pic->Scale.X * rw_midtexturescalex;
+			yscale = FLOAT2FIXED(rw_pic->Scale.Y * rw_midtexturescaley);
 			if (xscale != lwallscale)
 			{
 				PrepLWall (lwall, curline->sidedef->TexelLength*xscale, WallC.sx1, WallC.sx2);
@@ -1867,7 +1877,7 @@ void R_RenderSegLoop ()
 			}
 			if (midtexture->bWorldPanning)
 			{
-				rw_offset = MulScale16 (rw_offset_mid, xscale);
+				rw_offset = xs_RoundToInt(rw_offset_mid * xscale);
 			}
 			else
 			{
@@ -1901,8 +1911,8 @@ void R_RenderSegLoop ()
 			{
 				dc_texturemid = rw_toptexturemid;
 				rw_pic = toptexture;
-				xscale = fixed_t(rw_pic->Scale.X * rw_toptexturescalex);
-				yscale = fixed_t(rw_pic->Scale.Y * rw_toptexturescaley);
+				xscale = rw_pic->Scale.X * rw_toptexturescalex;
+				yscale = FLOAT2FIXED(rw_pic->Scale.Y * rw_toptexturescaley);
 				if (xscale != lwallscale)
 				{
 					PrepLWall (lwall, curline->sidedef->TexelLength*xscale, WallC.sx1, WallC.sx2);
@@ -1910,7 +1920,7 @@ void R_RenderSegLoop ()
 				}
 				if (toptexture->bWorldPanning)
 				{
-					rw_offset = MulScale16 (rw_offset_top, xscale);
+					rw_offset = xs_RoundToInt(rw_offset_top * xscale);
 				}
 				else
 				{
@@ -1947,8 +1957,8 @@ void R_RenderSegLoop ()
 			{
 				dc_texturemid = rw_bottomtexturemid;
 				rw_pic = bottomtexture;
-				xscale = fixed_t(rw_pic->Scale.X * rw_bottomtexturescalex);
-				yscale = fixed_t(rw_pic->Scale.Y * rw_bottomtexturescaley);
+				xscale = rw_pic->Scale.X * rw_bottomtexturescalex;
+				yscale = FLOAT2FIXED(rw_pic->Scale.Y * rw_bottomtexturescaley);
 				if (xscale != lwallscale)
 				{
 					PrepLWall (lwall, curline->sidedef->TexelLength*xscale, WallC.sx1, WallC.sx2);
@@ -1956,7 +1966,7 @@ void R_RenderSegLoop ()
 				}
 				if (bottomtexture->bWorldPanning)
 				{
-					rw_offset = MulScale16 (rw_offset_bottom, xscale);
+					rw_offset = xs_RoundToInt(rw_offset_bottom * xscale);
 				}
 				else
 				{
@@ -1987,7 +1997,8 @@ void R_RenderSegLoop ()
 
 void R_NewWall (bool needlights)
 {
-	fixed_t rowoffset, yrepeat;
+	fixed_t rowoffset;
+	double yrepeat;
 
 	rw_markportal = false;
 
@@ -2016,18 +2027,18 @@ void R_NewWall (bool needlights)
 			midtexture = TexMan(sidedef->GetTexture(side_t::mid), true);
 			rw_offset_mid = sidedef->GetTextureXOffset(side_t::mid);
 			rowoffset = sidedef->GetTextureYOffset(side_t::mid);
-			rw_midtexturescalex = sidedef->GetTextureXScale(side_t::mid);
-			rw_midtexturescaley = sidedef->GetTextureYScale(side_t::mid);
-			yrepeat = fixed_t(midtexture->Scale.Y * rw_midtexturescaley);
+			rw_midtexturescalex = FIXED2DBL(sidedef->GetTextureXScale(side_t::mid));
+			rw_midtexturescaley = FIXED2DBL(sidedef->GetTextureYScale(side_t::mid));
+			yrepeat = midtexture->Scale.Y * rw_midtexturescaley;
 			if (yrepeat >= 0)
 			{ // normal orientation
 				if (linedef->flags & ML_DONTPEGBOTTOM)
 				{ // bottom of texture at bottom
-					rw_midtexturemid = MulScale16(frontsector->GetPlaneTexZ(sector_t::floor) - viewz, yrepeat) + (midtexture->GetHeight() << FRACBITS);
+					rw_midtexturemid = FLOAT2FIXED((frontsector->GetPlaneTexZF(sector_t::floor) - ViewPos.Z) * yrepeat + midtexture->GetHeight());
 				}
 				else
 				{ // top of texture at top
-					rw_midtexturemid = MulScale16(frontsector->GetPlaneTexZ(sector_t::ceiling) - viewz, yrepeat);
+					rw_midtexturemid = FLOAT2FIXED((frontsector->GetPlaneTexZF(sector_t::ceiling) - ViewPos.Z) * yrepeat);
 					if (rowoffset < 0 && midtexture != NULL)
 					{
 						rowoffset += midtexture->GetHeight() << FRACBITS;
@@ -2039,16 +2050,16 @@ void R_NewWall (bool needlights)
 				rowoffset = -rowoffset;
 				if (linedef->flags & ML_DONTPEGBOTTOM)
 				{ // top of texture at bottom
-					rw_midtexturemid = MulScale16(frontsector->GetPlaneTexZ(sector_t::floor) - viewz, yrepeat);
+					rw_midtexturemid = FLOAT2FIXED((frontsector->GetPlaneTexZF(sector_t::floor) - ViewPos.Z) * yrepeat);
 				}
 				else
 				{ // bottom of texture at top
-					rw_midtexturemid = MulScale16(frontsector->GetPlaneTexZ(sector_t::ceiling) - viewz, yrepeat) + (midtexture->GetHeight() << FRACBITS);
+					rw_midtexturemid = FLOAT2FIXED((frontsector->GetPlaneTexZ(sector_t::ceiling) - ViewPos.Z) * yrepeat + midtexture->GetHeight());
 				}
 			}
 			if (midtexture->bWorldPanning)
 			{
-				rw_midtexturemid += MulScale16(rowoffset, yrepeat);
+				rw_midtexturemid += xs_FloorToInt(rowoffset * yrepeat);
 			}
 			else
 			{
@@ -2062,7 +2073,7 @@ void R_NewWall (bool needlights)
 	{ // two-sided line
 		// hack to allow height changes in outdoor areas
 
-		rw_frontlowertop = frontsector->GetPlaneTexZ(sector_t::ceiling);
+		rw_frontlowertop = frontsector->GetPlaneTexZF(sector_t::ceiling);
 
 		if (frontsector->GetTexture(sector_t::ceiling) == skyflatnum &&
 			backsector->GetTexture(sector_t::ceiling) == skyflatnum)
@@ -2083,7 +2094,7 @@ void R_NewWall (bool needlights)
 			}
 			// Putting sky ceilings on the front and back of a line alters the way unpegged
 			// positioning works.
-			rw_frontlowertop = backsector->GetPlaneTexZ(sector_t::ceiling);
+			rw_frontlowertop = backsector->GetPlaneTexZF(sector_t::ceiling);
 		}
 
 		if ((rw_backcz1 <= rw_frontfz1 && rw_backcz2 <= rw_frontfz2) ||
@@ -2171,14 +2182,14 @@ void R_NewWall (bool needlights)
 
 			rw_offset_top = sidedef->GetTextureXOffset(side_t::top);
 			rowoffset = sidedef->GetTextureYOffset(side_t::top);
-			rw_toptexturescalex = sidedef->GetTextureXScale(side_t::top);
-			rw_toptexturescaley = sidedef->GetTextureYScale(side_t::top);
-			yrepeat = fixed_t(toptexture->Scale.Y * rw_toptexturescaley);
+			rw_toptexturescalex = FIXED2DBL(sidedef->GetTextureXScale(side_t::top));
+			rw_toptexturescaley = FIXED2DBL(sidedef->GetTextureYScale(side_t::top));
+			yrepeat = toptexture->Scale.Y * rw_toptexturescaley;
 			if (yrepeat >= 0)
 			{ // normal orientation
 				if (linedef->flags & ML_DONTPEGTOP)
 				{ // top of texture at top
-					rw_toptexturemid = MulScale16(frontsector->GetPlaneTexZ(sector_t::ceiling) - viewz, yrepeat);
+					rw_toptexturemid = FLOAT2FIXED((frontsector->GetPlaneTexZF(sector_t::ceiling) - ViewPos.Z) * yrepeat);
 					if (rowoffset < 0 && toptexture != NULL)
 					{
 						rowoffset += toptexture->GetHeight() << FRACBITS;
@@ -2186,7 +2197,7 @@ void R_NewWall (bool needlights)
 				}
 				else
 				{ // bottom of texture at bottom
-					rw_toptexturemid = MulScale16(backsector->GetPlaneTexZ(sector_t::ceiling) - viewz, yrepeat) + (toptexture->GetHeight() << FRACBITS);
+					rw_toptexturemid = FLOAT2FIXED((backsector->GetPlaneTexZF(sector_t::ceiling) - ViewPos.Z) * yrepeat + toptexture->GetHeight());
 				}
 			}
 			else
@@ -2194,16 +2205,16 @@ void R_NewWall (bool needlights)
 				rowoffset = -rowoffset;
 				if (linedef->flags & ML_DONTPEGTOP)
 				{ // bottom of texture at top
-					rw_toptexturemid = MulScale16(frontsector->GetPlaneTexZ(sector_t::ceiling) - viewz, yrepeat) + (toptexture->GetHeight() << FRACBITS);
+					rw_toptexturemid = FLOAT2FIXED((frontsector->GetPlaneTexZF(sector_t::ceiling) - ViewPos.Z) * yrepeat + toptexture->GetHeight());
 				}
 				else
 				{ // top of texture at bottom
-					rw_toptexturemid = MulScale16(backsector->GetPlaneTexZ(sector_t::ceiling) - viewz, yrepeat);
+					rw_toptexturemid = FLOAT2FIXED((backsector->GetPlaneTexZF(sector_t::ceiling) - ViewPos.Z) * yrepeat);
 				}
 			}
 			if (toptexture->bWorldPanning)
 			{
-				rw_toptexturemid += MulScale16(rowoffset, yrepeat);
+				rw_toptexturemid += xs_FloorToInt(rowoffset * yrepeat);
 			}
 			else
 			{
@@ -2216,18 +2227,18 @@ void R_NewWall (bool needlights)
 
 			rw_offset_bottom = sidedef->GetTextureXOffset(side_t::bottom);
 			rowoffset = sidedef->GetTextureYOffset(side_t::bottom);
-			rw_bottomtexturescalex = sidedef->GetTextureXScale(side_t::bottom);
-			rw_bottomtexturescaley = sidedef->GetTextureYScale(side_t::bottom);
+			rw_bottomtexturescalex = FIXED2DBL(sidedef->GetTextureXScale(side_t::bottom));
+			rw_bottomtexturescaley = FIXED2DBL(sidedef->GetTextureYScale(side_t::bottom));
 			yrepeat = fixed_t(bottomtexture->Scale.Y * rw_bottomtexturescaley);
 			if (yrepeat >= 0)
 			{ // normal orientation
 				if (linedef->flags & ML_DONTPEGBOTTOM)
 				{ // bottom of texture at bottom
-					rw_bottomtexturemid = MulScale16(rw_frontlowertop - viewz, yrepeat);
+					rw_bottomtexturemid = FLOAT2FIXED((rw_frontlowertop - ViewPos.Z) * yrepeat);
 				}
 				else
 				{ // top of texture at top
-					rw_bottomtexturemid = MulScale16(backsector->GetPlaneTexZ(sector_t::floor) - viewz, yrepeat);
+					rw_bottomtexturemid = FLOAT2FIXED((backsector->GetPlaneTexZF(sector_t::floor) - ViewPos.Z) * yrepeat);
 					if (rowoffset < 0 && bottomtexture != NULL)
 					{
 						rowoffset += bottomtexture->GetHeight() << FRACBITS;
@@ -2239,16 +2250,16 @@ void R_NewWall (bool needlights)
 				rowoffset = -rowoffset;
 				if (linedef->flags & ML_DONTPEGBOTTOM)
 				{ // top of texture at bottom
-					rw_bottomtexturemid = MulScale16(rw_frontlowertop - viewz, yrepeat);
+					rw_bottomtexturemid = FLOAT2FIXED((rw_frontlowertop - ViewPos.Z) * yrepeat);
 				}
 				else
 				{ // bottom of texture at top
-					rw_bottomtexturemid = MulScale16(backsector->GetPlaneTexZ(sector_t::floor) - viewz, yrepeat) + (bottomtexture->GetHeight() << FRACBITS);
+					rw_bottomtexturemid = FLOAT2FIXED((backsector->GetPlaneTexZ(sector_t::floor) - ViewPos.Z) * yrepeat + bottomtexture->GetHeight());
 				}
 			}
 			if (bottomtexture->bWorldPanning)
 			{
-				rw_bottomtexturemid += MulScale16(rowoffset, yrepeat);
+				rw_bottomtexturemid += xs_FloorToInt(rowoffset * yrepeat);
 			}
 			else
 			{
@@ -2265,7 +2276,7 @@ void R_NewWall (bool needlights)
 	{
 		int planeside;
 
-		planeside = frontsector->floorplane.PointOnSide(viewx, viewy, viewz);
+		planeside = frontsector->floorplane.PointOnSide(ViewPos);
 		if (frontsector->floorplane.fC() < 0)	// 3D floors have the floor backwards
 			planeside = -planeside;
 		if (planeside <= 0)		// above view plane
@@ -2273,7 +2284,7 @@ void R_NewWall (bool needlights)
 
 		if (frontsector->GetTexture(sector_t::ceiling) != skyflatnum)
 		{
-			planeside = frontsector->ceilingplane.PointOnSide(viewx, viewy, viewz);
+			planeside = frontsector->ceilingplane.PointOnSide(ViewPos);
 			if (frontsector->ceilingplane.fC() > 0)	// 3D floors have the ceiling backwards
 				planeside = -planeside;
 			if (planeside <= 0)		// below view plane
@@ -2289,9 +2300,9 @@ void R_NewWall (bool needlights)
 	if (needlights && (segtextured || (backsector && IsFogBoundary(frontsector, backsector))))
 	{
 		lwallscale =
-			midtex ? int(midtex->Scale.X * sidedef->GetTextureXScale(side_t::mid)) :
-			toptexture ? int(toptexture->Scale.X * sidedef->GetTextureXScale(side_t::top)) :
-			bottomtexture ? int(bottomtexture->Scale.X * sidedef->GetTextureXScale(side_t::bottom)) :
+			midtex ? (midtex->Scale.X * sidedef->GetTextureXScale(side_t::mid) / 65536.0) :
+			toptexture ? (toptexture->Scale.X * sidedef->GetTextureXScale(side_t::top) / 65536.0) :
+			bottomtexture ? (bottomtexture->Scale.X * sidedef->GetTextureXScale(side_t::bottom) / 65536.0) :
 			FRACUNIT;
 
 		PrepWall (swall, lwall, sidedef->TexelLength * lwallscale, WallC.sx1, WallC.sx2);
@@ -2301,8 +2312,8 @@ void R_NewWall (bool needlights)
 			wallshade = LIGHT2SHADE(curline->sidedef->GetLightLevel(foggy, frontsector->lightlevel)
 				+ r_actualextralight);
 			GlobVis = r_WallVisibility;
-			rw_lightleft = SafeDivScale12 (GlobVis, WallC.sz1);
-			rw_lightstep = (SafeDivScale12 (GlobVis, WallC.sz2) - rw_lightleft) / (WallC.sx2 - WallC.sx1);
+			rw_lightleft = FLOAT2FIXED(FIXED2DBL(GlobVis) / WallC.sz1);
+			rw_lightstep = (FLOAT2FIXED(FIXED2DBL(GlobVis) / WallC.sz2) - rw_lightleft) / (WallC.sx2 - WallC.sx1);
 		}
 		else
 		{
@@ -2383,13 +2394,13 @@ void R_StoreWallRange (int start, int stop)
 	ds_p->sx2 = WallC.sx2;
 	ds_p->sz1 = WallC.sz1;
 	ds_p->sz2 = WallC.sz2;
-	ds_p->cx = WallC.tx1;
-	ds_p->cy = WallC.ty1;
-	ds_p->cdx = WallC.tx2 - WallC.tx1;
-	ds_p->cdy = WallC.ty2 - WallC.ty1;
+	ds_p->cx = WallC.tleft.X;;
+	ds_p->cy = WallC.tleft.Y;
+	ds_p->cdx = WallC.tright.X - WallC.tleft.X;
+	ds_p->cdy = WallC.tright.Y - WallC.tleft.Y;
 	ds_p->tmapvals = WallT;
-	ds_p->siz1 = (DWORD)DivScale32 (1, WallC.sz1) >> 1;
-	ds_p->siz2 = (DWORD)DivScale32 (1, WallC.sz2) >> 1;
+	ds_p->siz1 = 1 / WallC.sz1;
+	ds_p->siz2 = 1 / WallC.sz2;
 	ds_p->x1 = rw_x = start;
 	ds_p->x2 = stop;
 	ds_p->curline = curline;
@@ -2420,13 +2431,13 @@ void R_StoreWallRange (int start, int stop)
 		ds_p->silhouette = 0;
 
 		if (rw_frontfz1 > rw_backfz1 || rw_frontfz2 > rw_backfz2 ||
-			backsector->floorplane.PointOnSide(viewx, viewy, viewz) < 0)
+			backsector->floorplane.PointOnSide(ViewPos) < 0)
 		{
 			ds_p->silhouette = SIL_BOTTOM;
 		}
 
 		if (rw_frontcz1 < rw_backcz1 || rw_frontcz2 < rw_backcz2 ||
-			backsector->ceilingplane.PointOnSide(viewx, viewy, viewz) < 0)
+			backsector->ceilingplane.PointOnSide(ViewPos) < 0)
 		{
 			ds_p->silhouette |= SIL_TOP;
 		}
@@ -2509,7 +2520,7 @@ void R_StoreWallRange (int start, int stop)
 
 				if (pic->bWorldPanning)
 				{
-					xoffset = MulScale16 (xoffset, lwallscale);
+					xoffset = xs_RoundToInt(xoffset * lwallscale);
 				}
 
 				for (i = start; i < stop; i++)
@@ -2655,14 +2666,15 @@ void R_StoreWallRange (int start, int stop)
 	ds_p++;
 }
 
-int OWallMost (short *mostbuf, fixed_t z, const FWallCoords *wallc)
+int OWallMost (short *mostbuf, double z, const FWallCoords *wallc)
 {
-	int bad, y, ix1, ix2, iy1, iy2;
-	fixed_t s1, s2, s3, s4;
+	int bad, ix1, ix2;
+	double y, iy1, iy2;
+	double s1, s2, s3, s4;
 
-	z = -(z >> 4);
-	s1 = MulScale16 (globaluclip, wallc->sz1); s2 = MulScale16 (globaluclip, wallc->sz2);
-	s3 = MulScale16 (globaldclip, wallc->sz1); s4 = MulScale16 (globaldclip, wallc->sz2);
+	z = -z;
+	s1 = globaluclip * wallc->sz1; s2 = globaluclip * wallc->sz2;
+	s3 = globaldclip * wallc->sz1; s4 = globaldclip * wallc->sz2;
 	bad = (z<s1)+((z<s2)<<1)+((z>s3)<<2)+((z>s4)<<3);
 
 #if 1
@@ -2683,9 +2695,9 @@ int OWallMost (short *mostbuf, fixed_t z, const FWallCoords *wallc)
 #if 1
 	if (bad & 3)
 	{
-		int t = DivScale30 (z-s1, s2-s1);
-		int inty = wallc->sz1 + MulScale30 (wallc->sz2 - wallc->sz1, t);
-		int xcross = wallc->sx1 + Scale (MulScale30 (wallc->sz2, t), wallc->sx2 - wallc->sx1, inty);
+		double t = (z-s1) / (s2-s1);
+		double inty = wallc->sz1 + t * (wallc->sz2 - wallc->sz1);
+		int xcross = xs_RoundToInt(wallc->sx1 + (t * wallc->sz2 * (wallc->sx2 - wallc->sx1)) / inty);
 
 		if ((bad & 3) == 2)
 		{
@@ -2701,9 +2713,9 @@ int OWallMost (short *mostbuf, fixed_t z, const FWallCoords *wallc)
 
 	if (bad & 12)
 	{
-		int t = DivScale30 (z-s3, s4-s3);
-		int inty = wallc->sz1 + MulScale30 (wallc->sz2 - wallc->sz1, t);
-		int xcross = wallc->sx1 + Scale (MulScale30 (wallc->sz2, t), wallc->sx2 - wallc->sx1, inty);
+		double t = (z-s3) / (s4-s3);
+		double inty = wallc->sz1 + t * (wallc->sz2 - wallc->sz1);
+		int xcross = xs_RoundToInt(wallc->sx1 + (t * wallc->sz2 * (wallc->sx2 - wallc->sx1)) / inty);
 
 		if ((bad & 12) == 8)
 		{
@@ -2717,15 +2729,15 @@ int OWallMost (short *mostbuf, fixed_t z, const FWallCoords *wallc)
 		}
 	}
 
-	y = Scale (z, InvZtoScale, iy1);
+	y = z * InvZtoScale / iy1;
 	if (ix2 == ix1)
 	{
-		mostbuf[ix1] = (short)((y + centeryfrac) >> FRACBITS);
+		mostbuf[ix1] = (short)xs_RoundToInt(y + CenterY);
 	}
 	else
 	{
-		fixed_t yinc  = (Scale (z, InvZtoScale, iy2) - y) / (ix2 - ix1);
-		qinterpolatedown16short (&mostbuf[ix1], ix2-ix1, y + centeryfrac, yinc);
+		fixed_t yinc = FLOAT2FIXED(((z * InvZtoScale / iy2) - y) / (ix2 - ix1));
+		qinterpolatedown16short (&mostbuf[ix1], ix2-ix1, FLOAT2FIXED(y + CenterY), yinc);
 	}
 #else
 	double max = viewheight;
@@ -2766,36 +2778,37 @@ int WallMost (short *mostbuf, const secplane_t &plane, const FWallCoords *wallc)
 {
 	if (!plane.isSlope())
 	{
-		return OWallMost (mostbuf, plane.Zat0() - viewz, wallc);
+		return OWallMost(mostbuf, plane.Zat0() - ViewPos.Z, wallc);
 	}
 
-	fixed_t x, y, den, z1, z2, oz1, oz2;
-	fixed_t s1, s2, s3, s4;
-	int bad, ix1, ix2, iy1, iy2;
+	double x, y, den, z1, z2, oz1, oz2;
+	double s1, s2, s3, s4;
+	int bad, ix1, ix2;
+	double iy1, iy2;
 
 	if (MirrorFlags & RF_XFLIP)
 	{
-		x = curline->v2->fixX();
-		y = curline->v2->fixY();
-		if (wallc->sx1 == 0 && 0 != (den = wallc->tx1 - wallc->tx2 + wallc->ty1 - wallc->ty2))
+		x = curline->v2->fX();
+		y = curline->v2->fY();
+		if (wallc->sx1 == 0 && 0 != (den = wallc->tleft.X - wallc->tright.X + wallc->tleft.Y - wallc->tright.Y))
 		{
-			int frac = SafeDivScale30 (wallc->ty1 + wallc->tx1, den);
-			x -= MulScale30 (frac, x - curline->v1->fixX());
-			y -= MulScale30 (frac, y - curline->v1->fixY());
+			double frac = (wallc->tleft.Y + wallc->tleft.X) / den;
+			x -= frac * (x - curline->v1->fX());
+			y -= frac * (y - curline->v1->fY());
 		}
-		z1 = viewz - plane.ZatPointFixed(x, y);
+		z1 = ViewPos.Z - plane.ZatPoint(x, y);
 
 		if (wallc->sx2 > wallc->sx1 + 1)
 		{
-			x = curline->v1->fixX();
-			y = curline->v1->fixY();
-			if (wallc->sx2 == viewwidth && 0 != (den = wallc->tx1 - wallc->tx2 - wallc->ty1 + wallc->ty2))
+			x = curline->v1->fX();
+			y = curline->v1->fY();
+			if (wallc->sx2 == viewwidth && 0 != (den = wallc->tleft.X - wallc->tright.X - wallc->tleft.Y + wallc->tright.Y))
 			{
-				int frac = SafeDivScale30 (wallc->ty2 - wallc->tx2, den);
-				x += MulScale30 (frac, curline->v2->fixX() - x);
-				y += MulScale30 (frac, curline->v2->fixY() - y);
+				double frac = (wallc->tright.Y - wallc->tright.X) / den;
+				x += frac * (curline->v2->fX() - x);
+				y += frac * (curline->v2->fY() - y);
 			}
-			z2 = viewz - plane.ZatPointFixed(x, y);
+			z2 = ViewPos.Z - plane.ZatPoint(x, y);
 		}
 		else
 		{
@@ -2804,27 +2817,27 @@ int WallMost (short *mostbuf, const secplane_t &plane, const FWallCoords *wallc)
 	}
 	else
 	{
-		x = curline->v1->fixX();
-		y = curline->v1->fixY();
-		if (wallc->sx1 == 0 && 0 != (den = wallc->tx1 - wallc->tx2 + wallc->ty1 - wallc->ty2))
+		x = curline->v1->fX();
+		y = curline->v1->fY();
+		if (wallc->sx1 == 0 && 0 != (den = wallc->tleft.X - wallc->tright.X + wallc->tleft.Y - wallc->tright.Y))
 		{
-			int frac = SafeDivScale30 (wallc->ty1 + wallc->tx1, den);
-			x += MulScale30 (frac, curline->v2->fixX() - x);
-			y += MulScale30 (frac, curline->v2->fixY() - y);
+			double frac = (wallc->tleft.Y + wallc->tleft.X) / den;
+			x += frac * (curline->v2->fX() - x);
+			y += frac * (curline->v2->fY() - y);
 		}
-		z1 = viewz - plane.ZatPointFixed(x, y);
+		z1 = ViewPos.Z - plane.ZatPoint(x, y);
 
 		if (wallc->sx2 > wallc->sx1 + 1)
 		{
-			x = curline->v2->fixX();
-			y = curline->v2->fixY();
-			if (wallc->sx2 == viewwidth && 0 != (den = wallc->tx1 - wallc->tx2 - wallc->ty1 + wallc->ty2))
+			x = curline->v2->fX();
+			y = curline->v2->fY();
+			if (wallc->sx2 == viewwidth && 0 != (den = wallc->tleft.X - wallc->tright.X - wallc->tleft.Y + wallc->tright.Y))
 			{
-				int frac = SafeDivScale30 (wallc->ty2 - wallc->tx2, den);
-				x -= MulScale30 (frac, x - curline->v1->fixX());
-				y -= MulScale30 (frac, y - curline->v1->fixY());
+				double frac = (wallc->tright.Y - wallc->tright.X) / den;
+				x -= frac * (x - curline->v1->fX());
+				y -= frac * (y - curline->v1->fY());
 			}
-			z2 = viewz - plane.ZatPointFixed(x, y);
+			z2 = ViewPos.Z - plane.ZatPoint(x, y);
 		}
 		else
 		{
@@ -2832,8 +2845,8 @@ int WallMost (short *mostbuf, const secplane_t &plane, const FWallCoords *wallc)
 		}
 	}
 
-	s1 = MulScale12 (globaluclip, wallc->sz1); s2 = MulScale12 (globaluclip, wallc->sz2);
-	s3 = MulScale12 (globaldclip, wallc->sz1); s4 = MulScale12 (globaldclip, wallc->sz2);
+	s1 = globaluclip * wallc->sz1; s2 = globaluclip * wallc->sz2;
+	s3 = globaldclip * wallc->sz1; s4 = globaldclip * wallc->sz2;
 	bad = (z1<s1)+((z2<s2)<<1)+((z1>s3)<<2)+((z2>s4)<<3);
 
 	ix1 = wallc->sx1; ix2 = wallc->sx2;
@@ -2856,10 +2869,10 @@ int WallMost (short *mostbuf, const secplane_t &plane, const FWallCoords *wallc)
 	if (bad&3)
 	{
 			//inty = intz / (globaluclip>>16)
-		int t = SafeDivScale30 (oz1-s1, s2-s1+oz1-oz2);
-		int inty = wallc->sz1 + MulScale30 (wallc->sz2-wallc->sz1,t);
-		int intz = oz1 + MulScale30 (oz2-oz1,t);
-		int xcross = wallc->sx1 + Scale (MulScale30 (wallc->sz2, t), wallc->sx2-wallc->sx1, inty);
+		double t = (oz1-s1) / (s2-s1+oz1-oz2);
+		double inty = wallc->sz1 + t * (wallc->sz2-wallc->sz1);
+		double intz = oz1 + t * (oz2-oz1);
+		int xcross = wallc->sx1 + xs_RoundToInt((t * wallc->sz2 * (wallc->sx2-wallc->sx1)) / inty);
 
 		//t = divscale30((x1<<4)-xcross*yb1[w],xcross*(yb2[w]-yb1[w])-((x2-x1)<<4));
 		//inty = yb1[w] + mulscale30(yb2[w]-yb1[w],t);
@@ -2880,10 +2893,10 @@ int WallMost (short *mostbuf, const secplane_t &plane, const FWallCoords *wallc)
 	if (bad&12)
 	{
 			//inty = intz / (globaldclip>>16)
-		int t = SafeDivScale30 (oz1-s3, s4-s3+oz1-oz2);
-		int inty = wallc->sz1 + MulScale30 (wallc->sz2-wallc->sz1,t);
-		int intz = oz1 + MulScale30 (oz2-oz1,t);
-		int xcross = wallc->sx1 + Scale (MulScale30 (wallc->sz2, t), wallc->sx2-wallc->sx1,inty);
+		double t = (oz1-s3) / (s4-s3+oz1-oz2);
+		double inty = wallc->sz1 + t * (wallc->sz2-wallc->sz1);
+		double intz = oz1 + t * (oz2-oz1);
+		int xcross = wallc->sx1 + xs_RoundToInt((t * wallc->sz2 * (wallc->sx2-wallc->sx1)) / inty);
 
 		//t = divscale30((x1<<4)-xcross*yb1[w],xcross*(yb2[w]-yb1[w])-((x2-x1)<<4));
 		//inty = yb1[w] + mulscale30(yb2[w]-yb1[w],t);
@@ -2901,15 +2914,15 @@ int WallMost (short *mostbuf, const secplane_t &plane, const FWallCoords *wallc)
 		}
 	}
 
-	y = Scale (z1>>4, InvZtoScale, iy1);
+	y = z1 * InvZtoScale / iy1;
 	if (ix2 == ix1)
 	{
-		mostbuf[ix1] = (short)((y + centeryfrac) >> FRACBITS);
+		mostbuf[ix1] = (short)xs_RoundToInt(y/65536.0 + CenterY);
 	}
 	else
 	{
-		fixed_t yinc = (Scale (z2>>4, InvZtoScale, iy2) - y) / (ix2-ix1);
-		qinterpolatedown16short (&mostbuf[ix1], ix2-ix1, y + centeryfrac,yinc);
+		fixed_t yinc = FLOAT2FIXED(((z2 * InvZtoScale / iy2) - y) / (ix2-ix1));
+		qinterpolatedown16short (&mostbuf[ix1], ix2-ix1, FLOAT2FIXED(y/65536.0 + CenterY), yinc);
 	}
 
 	return bad;
@@ -2950,10 +2963,10 @@ static void PrepWallRoundFix(fixed_t *lwall, fixed_t walxrepeat, int x1, int x2)
 	}
 }
 
-void PrepWall (fixed_t *swall, fixed_t *lwall, fixed_t walxrepeat, int x1, int x2)
+void PrepWall (fixed_t *swall, fixed_t *lwall, double walxrepeat, int x1, int x2)
 { // swall = scale, lwall = texturecolumn
 	double top, bot, i;
-	double xrepeat = fabs((double)walxrepeat);
+	double xrepeat = fabs(walxrepeat * 65536);
 	double depth_scale = WallT.InvZstep * WallTMapScale2;
 	double depth_org = -WallT.UoverZstep * WallTMapScale2;
 
@@ -2976,14 +2989,14 @@ void PrepWall (fixed_t *swall, fixed_t *lwall, fixed_t walxrepeat, int x1, int x
 		top += WallT.UoverZstep;
 		bot += WallT.InvZstep;
 	}
-	PrepWallRoundFix(lwall, walxrepeat, x1, x2);
+	PrepWallRoundFix(lwall, FLOAT2FIXED(walxrepeat), x1, x2);
 }
 
-void PrepLWall (fixed_t *lwall, fixed_t walxrepeat, int x1, int x2)
+void PrepLWall (fixed_t *lwall, double walxrepeat, int x1, int x2)
 { // lwall = texturecolumn
 	double top, bot, i;
-	double xrepeat = fabs((double)walxrepeat);
-	double topstep;
+	double xrepeat = fabs(walxrepeat * 65536);
+	double topstep, botstep;
 
 	i = x1 - centerx;
 	top = WallT.UoverZorg + WallT.UoverZstep * i;
@@ -2991,6 +3004,7 @@ void PrepLWall (fixed_t *lwall, fixed_t walxrepeat, int x1, int x2)
 
 	top *= xrepeat;
 	topstep = WallT.UoverZstep * xrepeat;
+	botstep = WallT.InvZstep;
 
 	for (int x = x1; x < x2; x++)
 	{
@@ -3003,9 +3017,9 @@ void PrepLWall (fixed_t *lwall, fixed_t walxrepeat, int x1, int x2)
 			lwall[x] = xs_RoundToInt(top / bot);
 		}
 		top += topstep;
-		bot += WallT.InvZstep;
+		bot += botstep;
 	}
-	PrepWallRoundFix(lwall, walxrepeat, x1, x2);
+	PrepWallRoundFix(lwall, FLOAT2FIXED(walxrepeat), x1, x2);
 }
 
 // pass = 0: when seg is first drawn
@@ -3014,7 +3028,7 @@ void PrepLWall (fixed_t *lwall, fixed_t walxrepeat, int x1, int x2)
 
 static void R_RenderDecal (side_t *wall, DBaseDecal *decal, drawseg_t *clipper, int pass)
 {
-	fixed_t lx, ly, lx2, ly2, decalx, decaly;
+	DVector2 decal_left, decal_right, decal_pos;
 	int x1, x2;
 	fixed_t xscale, yscale;
 	fixed_t topoff;
@@ -3095,16 +3109,14 @@ static void R_RenderDecal (side_t *wall, DBaseDecal *decal, drawseg_t *clipper,
 
 	double dcx, dcy;
 	decal->GetXY(wall, dcx, dcy);
-	decalx = FLOAT2FIXED(dcx);
-	decaly = FLOAT2FIXED(dcy);
+	decal_pos = { dcx, dcy };
 
-	angle_t ang = R_PointToAngle2 (curline->v1->fixX(), curline->v1->fixY(), curline->v2->fixX(), curline->v2->fixY()) >> ANGLETOFINESHIFT;
-	lx  = decalx - FixedMul (x1, finecosine[ang]) - viewx;
-	lx2 = decalx + FixedMul (x2, finecosine[ang]) - viewx;
-	ly  = decaly - FixedMul (x1, finesine[ang]) - viewy;
-	ly2 = decaly + FixedMul (x2, finesine[ang]) - viewy;
+	DVector2 angvec = (curline->v2->fPos() - curline->v1->fPos()).Unit();
 
-	if (WallC.Init(lx, ly, lx2, ly2, TOO_CLOSE_Z))
+	decal_left = decal_pos - x1 * angvec - ViewPos;
+	decal_right = decal_pos + x2 * angvec - ViewPos;
+
+	if (WallC.Init(decal_left, decal_right, TOO_CLOSE_Z))
 		goto done;
 
 	x1 = WallC.sx1;
@@ -3169,10 +3181,8 @@ static void R_RenderDecal (side_t *wall, DBaseDecal *decal, drawseg_t *clipper,
 		break;
 	}
 
-	fixed_t fzpos;
-	fzpos = FLOAT2FIXED(zpos);	// pacify GCC
 	topoff = WallSpriteTile->TopOffset << FRACBITS;
-	dc_texturemid = topoff + FixedDiv (fzpos - viewz, yscale);
+	dc_texturemid = topoff + xs_ToInt((zpos - ViewPos.Z) * 65536 / yscale);
 
 	// Clip sprite to drawseg
 	x1 = MAX<int>(clipper->x1, x1);

src/r_segs.h

@@ -31,10 +31,10 @@ extern short *openings;
 extern ptrdiff_t lastopening;
 extern size_t maxopenings;
 
-int OWallMost (short *mostbuf, fixed_t z, const FWallCoords *wallc);
+int OWallMost (short *mostbuf, double z, const FWallCoords *wallc);
 int WallMost (short *mostbuf, const secplane_t &plane, const FWallCoords *wallc);
-void PrepWall (fixed_t *swall, fixed_t *lwall, fixed_t walxrepeat, int x1, int x2);
-void PrepLWall (fixed_t *lwall, fixed_t walxrepeat, int x1, int x2);
+void PrepWall (fixed_t *swall, fixed_t *lwall, double walxrepeat, int x1, int x2);
+void PrepLWall (fixed_t *lwall, double walxrepeat, int x1, int x2);
 
 ptrdiff_t R_NewOpening (ptrdiff_t len);
 

src/r_things.cpp

@@ -88,10 +88,10 @@ struct FCoverageBuffer
 	unsigned int NumLists;
 };
 
-extern fixed_t globaluclip, globaldclip;
+extern double globaluclip, globaldclip;
 
 
-#define MINZ			(2048*4)
+#define MINZ			double((2048*4) / double(1 << 20))
 #define BASEYCENTER 	(100)
 
 EXTERN_CVAR (Bool, st_scale)
@@ -151,7 +151,7 @@ static vissprite_t **spritesorter;
 static int spritesortersize = 0;
 static int vsprcount;
 
-static void R_ProjectWallSprite(AActor *thing, fixed_t fx, fixed_t fy, fixed_t fz, FTextureID picnum, fixed_t xscale, fixed_t yscale, INTBOOL flip);
+static void R_ProjectWallSprite(AActor *thing, const DVector3 &pos, FTextureID picnum, const DVector2 &scale, INTBOOL flip);
 
 
 
@@ -244,6 +244,7 @@ bool			sprflipvert;
 
 void R_DrawMaskedColumn (const BYTE *column, const FTexture::Span *span)
 {
+	fixed_t centeryfrac = FLOAT2FIXED(CenterY);
 	while (span->Length != 0)
 	{
 		const int length = span->Length;
@@ -357,7 +358,7 @@ static inline void R_CollectPortals()
 	}
 }
 
-static inline bool R_ClipSpriteColumnWithPortals(fixed_t x, fixed_t y, vissprite_t* spr)
+static inline bool R_ClipSpriteColumnWithPortals(vissprite_t* spr)
 {
 	// [ZZ] 10.01.2016: don't clip sprites from the root of a skybox.
 	if (CurrentPortalInSkybox)
@@ -371,10 +372,8 @@ static inline bool R_ClipSpriteColumnWithPortals(fixed_t x, fixed_t y, vissprite
 
 		// (all checks that are already done in R_CollectPortals have been removed for performance reasons.)
 
-		line_t* line = seg->curline->linedef;
-
 		// don't clip if the sprite is in front of the portal
-		if (!P_PointOnLineSidePrecise(FIXED2DBL(x), FIXED2DBL(y), line))
+		if (!P_PointOnLineSidePrecise(spr->gpos.X, spr->gpos.Y, seg->curline->linedef))
 			continue;
 
 		// now if current column is covered by this drawseg, we clip it away
@@ -399,13 +398,14 @@ void R_DrawVisSprite (vissprite_t *vis)
 	int				x2, stop4;
 	fixed_t			xiscale;
 	ESPSResult		mode;
-	bool			ispsprite = (!vis->sector && !vis->gx && !vis->gy && !vis->gz);
+	bool			ispsprite = (!vis->sector && vis->gpos != FVector3(0, 0, 0));
 
 	if (vis->xscale == 0 || vis->yscale == 0)
 	{ // scaled to 0; can't see
 		return;
 	}
 
+	fixed_t centeryfrac = FLOAT2FIXED(CenterY);
 	dc_colormap = vis->Style.colormap;
 
 	mode = R_SetPatchStyle (vis->Style.RenderStyle, vis->Style.Alpha, vis->Translation, vis->FillColor);
@@ -461,7 +461,7 @@ void R_DrawVisSprite (vissprite_t *vis)
 			while ((dc_x < stop4) && (dc_x & 3))
 			{
 				pixels = tex->GetColumn (frac >> FRACBITS, &spans);
-				if (ispsprite || !R_ClipSpriteColumnWithPortals(vis->gx, vis->gy, vis))
+				if (ispsprite || !R_ClipSpriteColumnWithPortals(vis))
 					R_DrawMaskedColumn (pixels, spans);
 				dc_x++;
 				frac += xiscale;
@@ -473,7 +473,7 @@ void R_DrawVisSprite (vissprite_t *vis)
 				for (int zz = 4; zz; --zz)
 				{
 					pixels = tex->GetColumn (frac >> FRACBITS, &spans);
-					if (ispsprite || !R_ClipSpriteColumnWithPortals(vis->gx, vis->gy, vis))
+					if (ispsprite || !R_ClipSpriteColumnWithPortals(vis))
 						R_DrawMaskedColumnHoriz (pixels, spans);
 					dc_x++;
 					frac += xiscale;
@@ -484,7 +484,7 @@ void R_DrawVisSprite (vissprite_t *vis)
 			while (dc_x < x2)
 			{
 				pixels = tex->GetColumn (frac >> FRACBITS, &spans);
-				if (ispsprite || !R_ClipSpriteColumnWithPortals(vis->gx, vis->gy, vis))
+				if (ispsprite || !R_ClipSpriteColumnWithPortals(vis))
 					R_DrawMaskedColumn (pixels, spans);
 				dc_x++;
 				frac += xiscale;
@@ -509,7 +509,7 @@ void R_DrawWallSprite(vissprite_t *spr)
 	WallT.InitFromWallCoords(&spr->wallc);
 	PrepWall(swall, lwall, spr->pic->GetWidth() << FRACBITS, x1, x2);
 	yscale = spr->yscale;
-	dc_texturemid = FixedDiv(spr->gzt - viewz, yscale);
+	dc_texturemid = FixedDiv(FLOAT2FIXED(spr->gzt - ViewPos.Z), yscale);
 	if (spr->renderflags & RF_XFLIP)
 	{
 		int right = (spr->pic->GetWidth() << FRACBITS) - 1;
@@ -533,8 +533,8 @@ void R_DrawWallSprite(vissprite_t *spr)
 
 	int shade = LIGHT2SHADE(spr->sector->lightlevel + r_actualextralight);
 	GlobVis = r_WallVisibility;
-	rw_lightleft = SafeDivScale12(GlobVis, spr->wallc.sz1);
-	rw_lightstep = (SafeDivScale12(GlobVis, spr->wallc.sz2) - rw_lightleft) / (spr->wallc.sx2 - spr->wallc.sx1);
+	rw_lightleft = SafeDivScale12(GlobVis, xs_Fix<12>::ToFix(spr->wallc.sz1));
+	rw_lightstep = (SafeDivScale12(GlobVis, xs_Fix<12>::ToFix(spr->wallc.sz2)) - rw_lightleft) / (spr->wallc.sx2 - spr->wallc.sx1);
 	rw_light = rw_lightleft + (x1 - spr->wallc.sx1) * rw_lightstep;
 	if (fixedlightlev >= 0)
 		dc_colormap = usecolormap->Maps + fixedlightlev;
@@ -595,7 +595,7 @@ void R_DrawWallSprite(vissprite_t *spr)
 			{ // calculate lighting
 				dc_colormap = usecolormap->Maps + (GETPALOOKUP (rw_light, shade) << COLORMAPSHIFT);
 			}
-			if (!R_ClipSpriteColumnWithPortals(spr->gx, spr->gy, spr))
+			if (!R_ClipSpriteColumnWithPortals(spr))
 				R_WallSpriteColumn(R_DrawMaskedColumn);
 			dc_x++;
 		}
@@ -609,7 +609,7 @@ void R_DrawWallSprite(vissprite_t *spr)
 			rt_initcols();
 			for (int zz = 4; zz; --zz)
 			{
-				if (!R_ClipSpriteColumnWithPortals(spr->gx, spr->gy, spr))
+				if (!R_ClipSpriteColumnWithPortals(spr))
 					R_WallSpriteColumn(R_DrawMaskedColumnHoriz);
 				dc_x++;
 			}
@@ -622,7 +622,7 @@ void R_DrawWallSprite(vissprite_t *spr)
 			{ // calculate lighting
 				dc_colormap = usecolormap->Maps + (GETPALOOKUP (rw_light, shade) << COLORMAPSHIFT);
 			}
-			if (!R_ClipSpriteColumnWithPortals(spr->gx, spr->gy, spr))
+			if (!R_ClipSpriteColumnWithPortals(spr))
 				R_WallSpriteColumn(R_DrawMaskedColumn);
 			dc_x++;
 		}
@@ -636,9 +636,9 @@ void R_WallSpriteColumn (void (*drawfunc)(const BYTE *column, const FTexture::Sp
 	dc_iscale = MulScale16 (swall[dc_x], rw_offset);
 	spryscale = SafeDivScale32 (1, dc_iscale);
 	if (sprflipvert)
-		sprtopscreen = centeryfrac + FixedMul (dc_texturemid, spryscale);
+		sprtopscreen = FLOAT2FIXED(CenterY) + FixedMul (dc_texturemid, spryscale);
 	else
-		sprtopscreen = centeryfrac - FixedMul (dc_texturemid, spryscale);
+		sprtopscreen = FLOAT2FIXED(CenterY) - FixedMul (dc_texturemid, spryscale);
 
 	const BYTE *column;
 	const FTexture::Span *spans;
@@ -679,7 +679,7 @@ void R_DrawVisVoxel(vissprite_t *spr, int minslabz, int maxslabz, short *cliptop
 	}
 
 	// Render the voxel, either directly to the screen or offscreen.
-	R_DrawVoxel(spr->vx, spr->vy, spr->vz, spr->vang, spr->gx, spr->gy, spr->gz, spr->angle,
+	R_DrawVoxel(spr->vpos, spr->vang, spr->gpos, spr->angle,
 		spr->xscale, spr->yscale, spr->voxel, spr->Style.colormap, cliptop, clipbot,
 		minslabz, maxslabz, flags);
 
@@ -728,15 +728,15 @@ void R_DrawVisVoxel(vissprite_t *spr, int minslabz, int maxslabz, short *cliptop
 //
 void R_ProjectSprite (AActor *thing, int fakeside, F3DFloor *fakefloor, F3DFloor *fakeceiling)
 {
-	fixed_t 			tr_x;
-	fixed_t 			tr_y;
+	double 			tr_x;
+	double 			tr_y;
 	
-	fixed_t				gzt;				// killough 3/27/98
-	fixed_t				gzb;				// [RH] use bottom of sprite, not actor
-	fixed_t 			tx, tx2;
-	fixed_t 			tz;
+	double				gzt;				// killough 3/27/98
+	double				gzb;				// [RH] use bottom of sprite, not actor
+	double	 			tx;// , tx2;
+	double 				tz;
 
-	fixed_t 			xscale = FRACUNIT, yscale = FRACUNIT;
+	double 				xscale = 1, yscale = 1;
 	
 	int 				x1;
 	int 				x2;
@@ -767,9 +767,7 @@ void R_ProjectSprite (AActor *thing, int fakeside, F3DFloor *fakefloor, F3DFloor
 
 	// [RH] Interpolate the sprite's position to make it look smooth
 	DVector3 pos = thing->InterpolatedPosition(r_TicFracF);
-	const fixed_t fx = FLOAT2FIXED(pos.X);
-	const fixed_t fy = FLOAT2FIXED(pos.Y);
-	fixed_t fz = FLOAT2FIXED(pos.Z + thing->GetBobOffset(r_TicFracF));
+	pos.Z += thing->GetBobOffset(r_TicFracF);
 
 	tex = NULL;
 	voxel = NULL;
@@ -801,15 +799,15 @@ void R_ProjectSprite (AActor *thing, int fakeside, F3DFloor *fakefloor, F3DFloor
 		{
 			// choose a different rotation based on player view
 			spriteframe_t *sprframe = &SpriteFrames[tex->Rotations];
-			angle_t ang = R_PointToAngle2 (viewx, viewy, fx, fy);
+			DAngle ang = (pos - ViewPos).Angle();
 			angle_t rot;
 			if (sprframe->Texture[0] == sprframe->Texture[1])
 			{
-				rot = (ang - thing->Angles.Yaw.BAMs() + (angle_t)(ANGLE_45/2)*9) >> 28;
+				rot = (ang - thing->Angles.Yaw + 45.0/2*9).BAMs() >> 28;
 			}
 			else
 			{
-				rot = (ang - thing->Angles.Yaw.BAMs() + (angle_t)(ANGLE_45/2)*9-(angle_t)(ANGLE_180/16)) >> 28;
+				rot = (ang - thing->Angles.Yaw + (45.0/2*9-180.0/16)).BAMs() >> 28;
 			}
 			picnum = sprframe->Texture[rot];
 			if (sprframe->Flip & (1 << rot))
@@ -840,15 +838,15 @@ void R_ProjectSprite (AActor *thing, int fakeside, F3DFloor *fakefloor, F3DFloor
 			//picnum = SpriteFrames[sprdef->spriteframes + thing->frame].Texture[0];
 			// choose a different rotation based on player view
 			spriteframe_t *sprframe = &SpriteFrames[sprdef->spriteframes + thing->frame];
-			angle_t ang = R_PointToAngle2 (viewx, viewy, fx, fy);
+			DAngle ang = (pos - ViewPos).Angle();
 			angle_t rot;
 			if (sprframe->Texture[0] == sprframe->Texture[1])
 			{
-				rot = (ang - thing->Angles.Yaw.BAMs() + (angle_t)(ANGLE_45/2)*9) >> 28;
+				rot = (ang - thing->Angles.Yaw + 45.0 / 2 * 9).BAMs() >> 28;
 			}
 			else
 			{
-				rot = (ang - thing->Angles.Yaw.BAMs() + (angle_t)(ANGLE_45/2)*9-(angle_t)(ANGLE_180/16)) >> 28;
+				rot = (ang - thing->Angles.Yaw + (45.0 / 2 * 9 - 180.0 / 16)).BAMs() >> 28;
 			}
 			picnum = sprframe->Texture[rot];
 			if (sprframe->Flip & (1 << rot))
@@ -872,37 +870,35 @@ void R_ProjectSprite (AActor *thing, int fakeside, F3DFloor *fakefloor, F3DFloor
 		return;
 	}
 
-	fixed_t spritescaleX = FLOAT2FIXED(spriteScale.X);
-	fixed_t spritescaleY = FLOAT2FIXED(spriteScale.Y);
 	if ((renderflags & RF_SPRITETYPEMASK) == RF_WALLSPRITE)
 	{
-		R_ProjectWallSprite(thing, fx, fy, fz, picnum, spritescaleX, spritescaleY, renderflags);
+		R_ProjectWallSprite(thing, pos, picnum, spriteScale, renderflags);
 		return;
 	}
 
 	// transform the origin point
-	tr_x = fx - viewx;
-	tr_y = fy - viewy;
+	tr_x = pos.X - ViewPos.X;
+	tr_y = pos.Y - ViewPos.Y;
 
-	tz = DMulScale20 (tr_x, viewtancos, tr_y, viewtansin);
+	tz = tr_x * ViewTanCos + tr_y * ViewTanSin;
 
 	// thing is behind view plane?
 	if (voxel == NULL && tz < MINZ)
 		return;
 
-	tx = DMulScale16 (tr_x, viewsin, -tr_y, viewcos);
+	tx = tr_x * ViewSin - tr_y * ViewCos;
 
 	// [RH] Flip for mirrors
 	if (MirrorFlags & RF_XFLIP)
 	{
 		tx = -tx;
 	}
-	tx2 = tx >> 4;
+	//tx2 = tx >> 4;
 
 	// too far off the side?
 	// if it's a voxel, it can be further off the side
-	if ((voxel == NULL && (abs(tx) >> 6) > abs(tz)) ||
-		(voxel != NULL && (abs(tx) >> 7) > abs(tz)))
+	if ((voxel == NULL && (fabs(tx / 64) > fabs(tz))) ||
+		(voxel != NULL && (fabs(tx / 128) > abs(tz))))
 	{
 		return;
 	}
@@ -912,16 +908,16 @@ void R_ProjectSprite (AActor *thing, int fakeside, F3DFloor *fakefloor, F3DFloor
 		// [RH] Added scaling
 		int scaled_to = tex->GetScaledTopOffset();
 		int scaled_bo = scaled_to - tex->GetScaledHeight();
-		gzt = fz + spritescaleY * scaled_to;
-		gzb = fz + spritescaleY * scaled_bo;
+		gzt = pos.Z + spriteScale.Y * scaled_to;
+		gzb = pos.Z + spriteScale.Y * scaled_bo;
 	}
 	else
 	{
-		xscale = fixed_t(spritescaleX * voxel->Scale);
-		yscale = fixed_t(spritescaleY * voxel->Scale);
-		fixed_t piv = fixed_t(voxel->Voxel->Mips[0].Pivot.Z*256.);
-		gzt = fz + MulScale8(yscale, piv) - FLOAT2FIXED(thing->Floorclip);
-		gzb = fz + MulScale8(yscale, piv - (voxel->Voxel->Mips[0].SizeZ << 8));
+		xscale = spriteScale.X * voxel->Scale;
+		yscale = spriteScale.Y * voxel->Scale;
+		double piv = voxel->Voxel->Mips[0].Pivot.Z;
+		gzt = pos.Z + yscale * piv - thing->Floorclip;
+		gzb = pos.Z + yscale * (piv - voxel->Voxel->Mips[0].SizeZ);
 		if (gzt <= gzb)
 			return;
 	}
@@ -955,11 +951,10 @@ void R_ProjectSprite (AActor *thing, int fakeside, F3DFloor *fakefloor, F3DFloor
 
 	if (voxel == NULL)
 	{
-		xscale = DivScale12 (centerxfrac, tz);
+		xscale = CenterX / tz;
 
 		// [RH] Reject sprites that are off the top or bottom of the screen
-		if (MulScale12 (globaluclip, tz) > viewz - gzb ||
-			MulScale12 (globaldclip, tz) < viewz - gzt)
+		if (globaluclip * tz > ViewPos.Z - gzb || globaldclip * tz < ViewPos.Z - gzt)
 		{
 			return;
 		}
@@ -968,36 +963,36 @@ void R_ProjectSprite (AActor *thing, int fakeside, F3DFloor *fakefloor, F3DFloor
 		renderflags ^= MirrorFlags & RF_XFLIP;
 
 		// calculate edges of the shape
-		const fixed_t thingxscalemul = fixed_t(spritescaleX / tex->Scale.X);
+		const double thingxscalemul = spriteScale.X / tex->Scale.X;
 
 		tx -= ((renderflags & RF_XFLIP) ? (tex->GetWidth() - tex->LeftOffset - 1) : tex->LeftOffset) * thingxscalemul;
-		x1 = centerx + MulScale32 (tx, xscale);
+		x1 = centerx + xs_RoundToInt(tx * xscale);
 
 		// off the right side?
 		if (x1 >= WindowRight)
 			return;
 
 		tx += tex->GetWidth() * thingxscalemul;
-		x2 = centerx + MulScale32 (tx, xscale);
+		x2 = centerx + xs_RoundToInt(tx * xscale);
 
 		// off the left side or too small?
 		if ((x2 < WindowLeft || x2 <= x1))
 			return;
 
-		xscale = fixed_t(FixedMul(spritescaleX, xscale) / tex->Scale.X);
+		xscale = spriteScale.X * xscale / tex->Scale.X;
 		iscale = (tex->GetWidth() << FRACBITS) / (x2 - x1);
 
-		fixed_t yscale = fixed_t(spritescaleY / tex->Scale.Y);
+		fixed_t yscale = FLOAT2FIXED(spriteScale.Y / tex->Scale.Y);
 
 		// store information in a vissprite
 		vis = R_NewVisSprite();
 
 		vis->CurrentPortalUniq = CurrentPortalUniq;
-		vis->xscale = xscale;
-		vis->yscale = Scale(InvZtoScale, yscale, tz << 4);
-		vis->idepth = (unsigned)DivScale32(1, tz) >> 1;	// tz is 20.12, so idepth ought to be 12.20, but signed math makes it 13.19
+		vis->xscale = FLOAT2FIXED(xscale);
+		vis->yscale = fixed_t(InvZtoScale * yscale / tz);
+		vis->idepth = float(1 / tz);
 		vis->floorclip = FixedDiv (FLOAT2FIXED(thing->Floorclip), yscale);
-		vis->texturemid = (tex->TopOffset << FRACBITS) - FixedDiv (viewz - fz + FLOAT2FIXED(thing->Floorclip), yscale);
+		vis->texturemid = (tex->TopOffset << FRACBITS) - FixedDiv(FLOAT2FIXED(ViewPos.Z - pos.Z + thing->Floorclip), yscale);
 		vis->x1 = x1 < WindowLeft ? WindowLeft : x1;
 		vis->x2 = x2 > WindowRight ? WindowRight : x2;
 		vis->angle = thing->Angles.Yaw.BAMs();
@@ -1021,14 +1016,14 @@ void R_ProjectSprite (AActor *thing, int fakeside, F3DFloor *fakefloor, F3DFloor
 		vis = R_NewVisSprite();
 
 		vis->CurrentPortalUniq = CurrentPortalUniq;
-		vis->xscale = xscale;
-		vis->yscale = yscale;
+		vis->xscale = FLOAT2FIXED(xscale);
+		vis->yscale = FLOAT2FIXED(yscale);
 		vis->x1 = WindowLeft;
 		vis->x2 = WindowRight;
-		vis->idepth = (unsigned)DivScale32(1, MAX(tz, MINZ)) >> 1;
+		vis->idepth = 1 / MINZ;
 		vis->floorclip = FLOAT2FIXED(thing->Floorclip);
 
-		fz -= FLOAT2FIXED(thing->Floorclip);
+		pos.Z -= thing->Floorclip;
 
 		vis->angle = thing->Angles.Yaw.BAMs() + voxel->AngleOffset.BAMs();
 
@@ -1039,24 +1034,20 @@ void R_ProjectSprite (AActor *thing, int fakeside, F3DFloor *fakefloor, F3DFloor
 			vis->angle -= ang.BAMs();
 		}
 
-		vis->vx = viewx;
-		vis->vy = viewy;
-		vis->vz = viewz;
-		vis->vang = viewangle;
+		vis->vpos = { (float)ViewPos.X, (float)ViewPos.Y, (float)ViewPos.Z };
+		vis->vang = FAngle((float)ViewAngle.Degrees);
 	}
 
 	// killough 3/27/98: save sector for special clipping later
 	vis->heightsec = heightsec;
 	vis->sector = thing->Sector;
 
-	vis->depth = tz;
-	vis->gx = fx;
-	vis->gy = fy;
-	vis->gz = fz;
-	vis->gzb = gzb;		// [RH] use gzb, not thing->z
-	vis->gzt = gzt;		// killough 3/27/98
-	vis->deltax = fx - viewx;
-	vis->deltay = fy - viewy;
+	vis->depth = (float)tz;
+	vis->gpos = { (float)pos.X, (float)pos.Y, (float)pos.Z };
+	vis->gzb = (float)gzb;		// [RH] use gzb, not thing->z
+	vis->gzt = (float)gzt;		// killough 3/27/98
+	vis->deltax = float(pos.X - ViewPos.X);
+	vis->deltay = float(pos.Y - ViewPos.Y);
 	vis->renderflags = renderflags;
 	if(thing->flags5 & MF5_BRIGHT) vis->renderflags |= RF_FULLBRIGHT; // kg3D
 	vis->Style.RenderStyle = thing->RenderStyle;
@@ -1137,20 +1128,22 @@ void R_ProjectSprite (AActor *thing, int fakeside, F3DFloor *fakefloor, F3DFloor
 		else
 		{ // diminished light
 			vis->ColormapNum = GETPALOOKUP(
-				(fixed_t)DivScale12 (r_SpriteVisibility, MAX(tz, MINZ)), spriteshade);
+				(fixed_t)(r_SpriteVisibility / MAX(tz, MINZ)), spriteshade);
 			vis->Style.colormap = mybasecolormap->Maps + (vis->ColormapNum << COLORMAPSHIFT);
 		}
 	}
 }
 
-static void R_ProjectWallSprite(AActor *thing, fixed_t fx, fixed_t fy, fixed_t fz, FTextureID picnum, fixed_t xscale, fixed_t yscale, int renderflags)
+static void R_ProjectWallSprite(AActor *thing, const DVector3 &pos, FTextureID picnum, const DVector2 &scale, int renderflags)
 {
 	FWallCoords wallc;
-	int x1, x2;
-	fixed_t lx1, lx2, ly1, ly2;
-	fixed_t gzb, gzt, tz;
+	double x1, x2;
+	DVector2 left, right;
+	double gzb, gzt, tz;
 	FTexture *pic = TexMan(picnum, true);
-	angle_t ang = (thing->Angles.Yaw.BAMs() + ANGLE_90) >> ANGLETOFINESHIFT;
+	DAngle ang = thing->Angles.Yaw + 90;
+	double angcos = ang.Cos();
+	double angsin = ang.Sin();
 	vissprite_t *vis;
 
 	// Determine left and right edges of sprite. The sprite's angle is its normal,
@@ -1158,16 +1151,16 @@ static void R_ProjectWallSprite(AActor *thing, fixed_t fx, fixed_t fy, fixed_t f
 	x2 = pic->GetScaledWidth();
 	x1 = pic->GetScaledLeftOffset();
 
-	x1 *= xscale;
-	x2 *= xscale;
+	x1 *= scale.X;
+	x2 *= scale.X;
 
-	lx1 = fx - FixedMul(x1, finecosine[ang]) - viewx;
-	ly1 = fy - FixedMul(x1, finesine[ang]) - viewy;
-	lx2 = lx1 + FixedMul(x2, finecosine[ang]);
-	ly2 = ly1 + FixedMul(x2, finesine[ang]);
+	left.X = pos.X - x1 * angcos - ViewPos.X;
+	left.Y = pos.Y - x1 * angsin - ViewPos.Y;
+	right.X = left.X + x2 * angcos;
+	right.Y = right.Y + x2 * angsin;
 
 	// Is it off-screen?
-	if (wallc.Init(lx1, ly1, lx2, ly2, TOO_CLOSE_Z))
+	if (wallc.Init(left, right, TOO_CLOSE_Z))
 		return;
 	
 	if (wallc.sx1 >= WindowRight || wallc.sx2 <= WindowLeft)
@@ -1175,29 +1168,27 @@ static void R_ProjectWallSprite(AActor *thing, fixed_t fx, fixed_t fy, fixed_t f
 
 	// Sprite sorting should probably treat these as walls, not sprites,
 	// but right now, I just want to get them drawing.
-	tz = DMulScale20(fx - viewx, viewtancos, fy - viewy, viewtansin);
+	tz = (pos.X - ViewPos.X) * ViewTanCos + (pos.Y - ViewPos.Y) * ViewTanSin;
 
 	int scaled_to = pic->GetScaledTopOffset();
 	int scaled_bo = scaled_to - pic->GetScaledHeight();
-	gzt = fz + yscale * scaled_to;
-	gzb = fz + yscale * scaled_bo;
+	gzt = pos.Z + scale.Y * scaled_to;
+	gzb = pos.Z + scale.Y * scaled_bo;
 
 	vis = R_NewVisSprite();
 	vis->CurrentPortalUniq = CurrentPortalUniq;
 	vis->x1 = wallc.sx1 < WindowLeft ? WindowLeft : wallc.sx1;
 	vis->x2 = wallc.sx2 >= WindowRight ? WindowRight : wallc.sx2;
-	vis->yscale = yscale;
-	vis->idepth = (unsigned)DivScale32(1, tz) >> 1;
-	vis->depth = tz;
+	vis->yscale = FLOAT2FIXED(scale.Y);
+	vis->idepth = float(1 / tz);
+	vis->depth = (float)tz;
 	vis->sector = thing->Sector;
 	vis->heightsec = NULL;
-	vis->gx = fx;
-	vis->gy = fy;
-	vis->gz = fz;
-	vis->gzb = gzb;
-	vis->gzt = gzt;
-	vis->deltax = fx - viewx;
-	vis->deltay = fy - viewy;
+	vis->gpos = { (float)pos.X, (float)pos.Y, (float)pos.Z };
+	vis->gzb = (float)gzb;
+	vis->gzt = (float)gzt;
+	vis->deltax = float(pos.X - ViewPos.X);
+	vis->deltay = float(pos.Y - ViewPos.Y);
 	vis->renderflags = renderflags;
 	if(thing->flags5 & MF5_BRIGHT) vis->renderflags |= RF_FULLBRIGHT; // kg3D
 	vis->Style.RenderStyle = thing->RenderStyle;
@@ -1213,7 +1204,7 @@ static void R_ProjectWallSprite(AActor *thing, fixed_t fx, fixed_t fy, fixed_t f
 	vis->bIsVoxel = false;
 	vis->bWallSprite = true;
 	vis->ColormapNum = GETPALOOKUP(
-		(fixed_t)DivScale12 (r_SpriteVisibility, MAX(tz, MINZ)), spriteshade);
+		(fixed_t)DivScale12 (r_SpriteVisibility, xs_Fix<20>::ToFix(MAX(tz, MINZ))), spriteshade);
 	vis->Style.colormap = basecolormap->Maps + (vis->ColormapNum << COLORMAPSHIFT);
 	vis->wallc = wallc;
 }
@@ -1325,14 +1316,14 @@ void R_DrawPSprite (pspdef_t* psp, int pspnum, AActor *owner, fixed_t sx, fixed_
 	tx = sx-((320/2)<<FRACBITS);
 
 	tx -= tex->GetScaledLeftOffset() << FRACBITS;
-	x1 = (centerxfrac + FixedMul (tx, pspritexscale)) >>FRACBITS;
+	x1 = centerx + (FixedMul(tx, pspritexscale) >> FRACBITS);
 
 	// off the right side
 	if (x1 > viewwidth)
 		return; 
 
 	tx += tex->GetScaledWidth() << FRACBITS;
-	x2 = ((centerxfrac + FixedMul (tx, pspritexscale)) >>FRACBITS);
+	x2 = centerx + (FixedMul(tx, pspritexscale) >> FRACBITS);
 
 	// off the left side
 	if (x2 <= 0)
@@ -1544,10 +1535,10 @@ void R_DrawPlayerSprites ()
 
 	if(fixedlightlev < 0 && viewsector->e && viewsector->e->XFloor.lightlist.Size()) {
 		for(i = viewsector->e->XFloor.lightlist.Size() - 1; i >= 0; i--)
-			if(viewz <= viewsector->e->XFloor.lightlist[i].plane.Zat0()) {
+			if(ViewPos.Z <= viewsector->e->XFloor.lightlist[i].plane.Zat0()) {
 				rover = viewsector->e->XFloor.lightlist[i].caster;
 				if(rover) {
-					if(rover->flags & FF_DOUBLESHADOW && viewz <= rover->bottom.plane->Zat0())
+					if(rover->flags & FF_DOUBLESHADOW && ViewPos.Z <= rover->bottom.plane->Zat0())
 						break;
 					sec = rover->model;
 					if(rover->flags & FF_FADEWALLS)
@@ -1586,11 +1577,10 @@ void R_DrawPlayerSprites ()
 
 	if (camera->player != NULL)
 	{
-		fixed_t centerhack = centeryfrac;
+		double centerhack = CenterY;
 		float ofsx, ofsy;
 
-		centery = viewheight >> 1;
-		centeryfrac = centery << FRACBITS;
+		CenterY = viewheight / 2;
 
 		P_BobWeapon (camera->player, &camera->player->psprites[ps_weapon], &ofsx, &ofsy, r_TicFracF);
 
@@ -1611,8 +1601,7 @@ void R_DrawPlayerSprites ()
 			}
 		}
 
-		centeryfrac = centerhack;
-		centery = centerhack >> FRACBITS;
+		CenterY = centerhack;
 	}
 }
 
@@ -1914,8 +1903,8 @@ void R_DrawSprite (vissprite_t *spr)
 	if (!spr->bIsVoxel && spr->pic == NULL)
 	{
 		// kg3D - reject invisible parts
-		if ((fake3D & FAKE3D_CLIPBOTTOM) && spr->gz <= sclipBottom) return;
-		if ((fake3D & FAKE3D_CLIPTOP)    && spr->gz >= sclipTop) return;
+		if ((fake3D & FAKE3D_CLIPBOTTOM) && spr->gpos.Z <= sclipBottom) return;
+		if ((fake3D & FAKE3D_CLIPTOP)    && spr->gpos.Z >= sclipTop) return;
 		R_DrawParticle (spr);
 		return;
 	}
@@ -1940,7 +1929,7 @@ void R_DrawSprite (vissprite_t *spr)
 	{
 		if (!(fake3D & FAKE3D_CLIPTOP))
 		{
-			sclipTop = spr->sector->ceilingplane.ZatPointFixed(viewx, viewy);
+			sclipTop = spr->sector->ceilingplane.ZatPointFixed(ViewPos);
 		}
 		sector_t *sec = NULL;
 		for (i = spr->sector->e->XFloor.lightlist.Size() - 1; i >= 0; i--)
@@ -2013,7 +2002,7 @@ void R_DrawSprite (vissprite_t *spr)
 			{ // diminished light
 				spriteshade = LIGHT2SHADE(sec->lightlevel + r_actualextralight);
 				spr->Style.colormap = mybasecolormap->Maps + (GETPALOOKUP (
-					(fixed_t)DivScale12 (r_SpriteVisibility, MAX(MINZ, spr->depth)), spriteshade) << COLORMAPSHIFT);
+					(fixed_t)DivScale12 (r_SpriteVisibility, xs_Fix<20>::ToFix(MAX(MINZ, (double)spr->depth))), spriteshade) << COLORMAPSHIFT);
 			}
 		}
 	}
@@ -2028,8 +2017,8 @@ void R_DrawSprite (vissprite_t *spr)
 	// Clip the sprite against deep water and/or fake ceilings.
 	// [RH] rewrote this to be based on which part of the sector is really visible
 
-	fixed_t scale = MulScale19 (InvZtoScale, spr->idepth);
-	fixed_t hzb = FIXED_MIN, hzt = FIXED_MAX;
+	double scale = InvZtoScale * spr->idepth;
+	double hzb = DBL_MIN, hzt = DBL_MAX;
 
 	if (spr->bIsVoxel && spr->floorclip != 0)
 	{
@@ -2040,8 +2029,8 @@ void R_DrawSprite (vissprite_t *spr)
 	{ // only things in specially marked sectors
 		if (spr->FakeFlatStat != FAKED_AboveCeiling)
 		{
-			fixed_t hz = spr->heightsec->floorplane.ZatPointFixed(spr->gx, spr->gy);
-			fixed_t h = (centeryfrac - FixedMul (hz-viewz, scale)) >> FRACBITS;
+			double hz = spr->heightsec->floorplane.ZatPoint(spr->gpos);
+			int h = xs_RoundToInt(CenterY - (hz - ViewPos.Z) * scale);
 
 			if (spr->FakeFlatStat == FAKED_BelowFloor)
 			{ // seen below floor: clip top
@@ -2062,8 +2051,8 @@ void R_DrawSprite (vissprite_t *spr)
 		}
 		if (spr->FakeFlatStat != FAKED_BelowFloor && !(spr->heightsec->MoreFlags & SECF_FAKEFLOORONLY))
 		{
-			fixed_t hz = spr->heightsec->ceilingplane.ZatPointFixed(spr->gx, spr->gy);
-			fixed_t h = (centeryfrac - FixedMul (hz-viewz, scale)) >> FRACBITS;
+			double hz = spr->heightsec->ceilingplane.ZatPoint(spr->gpos);
+			int h = xs_RoundToInt(CenterY - (hz - ViewPos.Z) * scale);
 
 			if (spr->FakeFlatStat == FAKED_AboveCeiling)
 			{ // seen above ceiling: clip bottom
@@ -2086,7 +2075,7 @@ void R_DrawSprite (vissprite_t *spr)
 	// killough 3/27/98: end special clipping for deep water / fake ceilings
 	else if (!spr->bIsVoxel && spr->floorclip)
 	{ // [RH] Move floorclip stuff from R_DrawVisSprite to here
-		int clip = ((centeryfrac - FixedMul (spr->texturemid -
+		int clip = ((FLOAT2FIXED(CenterY) - FixedMul (spr->texturemid -
 			(spr->pic->GetHeight() << FRACBITS) +
 			spr->floorclip, spr->yscale)) >> FRACBITS);
 		if (clip < botclip)
@@ -2099,16 +2088,16 @@ void R_DrawSprite (vissprite_t *spr)
 	{
 		if (!spr->bIsVoxel)
 		{
-			fixed_t h = sclipBottom;
+			double hz = sclipBottom;
 			if (spr->fakefloor)
 			{
-				fixed_t floorz = spr->fakefloor->top.plane->Zat0();
-				if (viewz > floorz && floorz == sclipBottom )
+				double floorz = spr->fakefloor->top.plane->Zat0();
+				if (ViewPos.Z > floorz && floorz == sclipBottom )
 				{
-					h = spr->fakefloor->bottom.plane->Zat0();
+					hz = spr->fakefloor->bottom.plane->Zat0();
 				}
 			}
-			h = (centeryfrac - FixedMul(h-viewz, scale)) >> FRACBITS;
+			int h = xs_RoundToInt(CenterY - (hz - ViewPos.Z) * scale);
 			if (h < botclip)
 			{
 				botclip = MAX<short>(0, h);
@@ -2120,17 +2109,16 @@ void R_DrawSprite (vissprite_t *spr)
 	{
 		if (!spr->bIsVoxel)
 		{
-			fixed_t h = sclipTop;
-
+			double hz = sclipTop;
 			if (spr->fakeceiling != NULL)
 			{
-				fixed_t ceilingZ = spr->fakeceiling->bottom.plane->Zat0();
-				if (viewz < ceilingZ && ceilingZ == sclipTop)
+				double ceilingZ = spr->fakeceiling->bottom.plane->Zat0();
+				if (ViewPos.Z < ceilingZ && ceilingZ == sclipTop)
 				{
-					h = spr->fakeceiling->top.plane->Zat0();
+					hz = spr->fakeceiling->top.plane->Zat0();
 				}
 			}
-			h = (centeryfrac - FixedMul (h-viewz, scale)) >> FRACBITS;
+			int h = xs_RoundToInt(CenterY - (hz - ViewPos.Z) * scale);
 			if (h > topclip)
 			{
 				topclip = MIN<short>(h, viewheight);
@@ -2206,7 +2194,7 @@ void R_DrawSprite (vissprite_t *spr)
 		r1 = MAX<int> (ds->x1, x1);
 		r2 = MIN<int> (ds->x2, x2);
 
-		fixed_t neardepth, fardepth;
+		float neardepth, fardepth;
 		if (!spr->bWallSprite)
 		{
 			if (ds->sz1 < ds->sz2)
@@ -2220,8 +2208,8 @@ void R_DrawSprite (vissprite_t *spr)
 		}
 		// Check if sprite is in front of draw seg:
 		if ((!spr->bWallSprite && neardepth > spr->depth) || ((spr->bWallSprite || fardepth > spr->depth) &&
-			DMulScale32(spr->gy - ds->curline->v1->fixY(), ds->curline->v2->fixX() - ds->curline->v1->fixX(),
-						ds->curline->v1->fixX() - spr->gx, ds->curline->v2->fixY() - ds->curline->v1->fixY()) <= 0))
+			(spr->gpos.Y - ds->curline->v1->fY()) * (ds->curline->v2->fX() - ds->curline->v1->fX()) -
+			(spr->gpos.X - ds->curline->v1->fX()) * (ds->curline->v2->fY() - ds->curline->v1->fY()) <= 0))
 		{
 			// seg is behind sprite, so draw the mid texture if it has one
 			if (ds->CurrentPortalUniq == CurrentPortalUniq && // [ZZ] instead, portal uniq check is made here
@@ -2307,8 +2295,8 @@ void R_DrawSprite (vissprite_t *spr)
 		{
 			clearbufshort(cliptop + x2, viewwidth - x2, viewheight);
 		}
-		int minvoxely = spr->gzt <= hzt ? 0 : (spr->gzt - hzt) / spr->yscale;
-		int maxvoxely = spr->gzb > hzb ? INT_MAX : (spr->gzt - hzb) / spr->yscale;
+		int minvoxely = spr->gzt <= hzt ? 0 : FLOAT2FIXED(spr->gzt - hzt) / spr->yscale;
+		int maxvoxely = spr->gzb > hzb ? INT_MAX : FLOAT2FIXED(spr->gzt - hzb) / spr->yscale;
 		R_DrawVisVoxel(spr, minvoxely, maxvoxely, cliptop, clipbot);
 	}
 	spr->Style.colormap = colormap;
@@ -2360,7 +2348,7 @@ void R_DrawMaskedSingle (bool renew)
 	}
 }
 
-void R_DrawHeightPlanes(fixed_t height); // kg3D - fake planes
+void R_DrawHeightPlanes(double height); // kg3D - fake planes
 
 void R_DrawMasked (void)
 {
@@ -2376,7 +2364,7 @@ void R_DrawMasked (void)
 		HeightLevel *hl;
 
 		// ceilings
-		for (hl = height_cur; hl != NULL && hl->height >= viewz; hl = hl->prev)
+		for (hl = height_cur; hl != NULL && hl->height >= ViewPos.Z; hl = hl->prev)
 		{
 			if (hl->next)
 			{
@@ -2397,7 +2385,7 @@ void R_DrawMasked (void)
 		sclipTop = height_top->height;
 		R_DrawMaskedSingle(true);
 		hl = height_top;
-		for (hl = height_top; hl != NULL && hl->height < viewz; hl = hl->next)
+		for (hl = height_top; hl != NULL && hl->height < ViewPos.Z; hl = hl->next)
 		{
 			R_DrawHeightPlanes(hl->height);
 			if (hl->next)
@@ -2421,11 +2409,10 @@ void R_DrawMasked (void)
 
 void R_ProjectParticle (particle_t *particle, const sector_t *sector, int shade, int fakeside)
 {
-	fixed_t 			tr_x;
-	fixed_t 			tr_y;
-	fixed_t 			tx, ty;
-	fixed_t 			tz, tiz;
-	fixed_t 			xscale, yscale;
+	double 				tr_x, tr_y;
+	double 				tx, ty;
+	double	 			tz, tiz;
+	double	 			xscale, yscale;
 	int 				x1, x2, y1, y2;
 	vissprite_t*		vis;
 	sector_t*			heightsec = NULL;
@@ -2436,16 +2423,16 @@ void R_ProjectParticle (particle_t *particle, const sector_t *sector, int shade,
 		return;
 
 	// transform the origin point
-	tr_x = FLOAT2FIXED(particle->Pos.X - ViewPos.X);
-	tr_y = FLOAT2FIXED(particle->Pos.Y - ViewPos.Y);
+	tr_x = particle->Pos.X - ViewPos.X;
+	tr_y = particle->Pos.Y - ViewPos.Y;
 
-	tz = DMulScale20 (tr_x, viewtancos, tr_y, viewtansin);
+	tz = tr_x * ViewTanCos + tr_y * ViewTanSin;
 
 	// particle is behind view plane?
 	if (tz < MINZ)
 		return;
 
-	tx = DMulScale20 (tr_x, viewsin, -tr_y, viewcos);
+	tx = tr_x * ViewSin - tr_y * ViewCos;
 
 	// Flip for mirrors
 	if (MirrorFlags & RF_XFLIP)
@@ -2454,26 +2441,25 @@ void R_ProjectParticle (particle_t *particle, const sector_t *sector, int shade,
 	}
 
 	// too far off the side?
-	if (tz <= abs (tx))
+	if (tz <= fabs(tx))
 		return;
 
-	tiz = 268435456 / tz;
+	tiz = 1 / tz;
 	xscale = centerx * tiz;
 
 	// calculate edges of the shape
-	int psize = particle->size << (12-3);
+	double psize = particle->size / 8.0;
 
-	x1 = MAX<int> (WindowLeft, (centerxfrac + MulScale12 (tx-psize, xscale)) >> FRACBITS);
-	x2 = MIN<int> (WindowRight, (centerxfrac + MulScale12 (tx+psize, xscale)) >> FRACBITS);
+	x1 = MAX<int>(WindowLeft, centerx + xs_RoundToInt((tx - psize) * xscale));
+	x2 = MIN<int>(WindowRight, centerx + xs_RoundToInt((tx + psize) * xscale));
 
 	if (x1 >= x2)
 		return;
 
-	yscale = MulScale16(yaspectmul, xscale);
+	yscale = xs_RoundToInt(YaspectMul * xscale);
 	ty = FLOAT2FIXED(particle->Pos.Z - ViewPos.Z);
-	psize <<= 4;
-	y1 = (centeryfrac - FixedMul (ty+psize, yscale)) >> FRACBITS;
-	y2 = (centeryfrac - FixedMul (ty-psize, yscale)) >> FRACBITS;
+	y1 = xs_RoundToInt(CenterY - (ty + psize) * yscale);
+	y2 = xs_RoundToInt(CenterY - (ty - psize) * yscale);
 
 	// Clip the particle now. Because it's a point and projected as its subsector is
 	// entered, we don't need to clip it to drawsegs like a normal sprite.
@@ -2540,16 +2526,13 @@ void R_ProjectParticle (particle_t *particle, const sector_t *sector, int shade,
 	vis = R_NewVisSprite ();
 	vis->CurrentPortalUniq = CurrentPortalUniq;
 	vis->heightsec = heightsec;
-	vis->xscale = xscale;
+	vis->yscale = vis->xscale = FLOAT2FIXED(xscale);
 //	vis->yscale = FixedMul (xscale, InvZtoScale);
-	vis->yscale = xscale;
-	vis->depth = tz;
-	vis->idepth = (DWORD)DivScale32 (1, tz) >> 1;
-	vis->gx = FLOAT2FIXED(particle->Pos.X);
-	vis->gy = FLOAT2FIXED(particle->Pos.Y);
-	vis->gz = FLOAT2FIXED(particle->Pos.Z);
-	vis->gzb = y1;
-	vis->gzt = y2;
+	vis->depth = (float)tz;
+	vis->idepth = float(1 / tz);
+	vis->gpos = { (float)particle->Pos.X, (float)particle->Pos.Y, (float)particle->Pos.Z };
+	vis->y1 = y1;
+	vis->y2 = y2;
 	vis->x1 = x1;
 	vis->x2 = x2;
 	vis->Translation = 0;
@@ -2569,14 +2552,15 @@ void R_ProjectParticle (particle_t *particle, const sector_t *sector, int shade,
 	{
 		vis->Style.colormap = fixedcolormap;
 	}
-	else if(particle->bright) {
+	else if (particle->bright)
+	{
 		vis->Style.colormap = map;
 	}
 	else
 	{
 		// Using MulScale15 instead of 16 makes particles slightly more visible
 		// than regular sprites.
-		vis->ColormapNum = GETPALOOKUP(MulScale15 (tiz, r_SpriteVisibility), shade);
+		vis->ColormapNum = GETPALOOKUP(MulScale15 (FLOAT2FIXED(tiz), r_SpriteVisibility), shade);
 		vis->Style.colormap = map + (vis->ColormapNum << COLORMAPSHIFT);
 	}
 }
@@ -2597,7 +2581,7 @@ static void R_DrawMaskedSegsBehindParticle (const vissprite_t *vis)
 		{
 			continue;
 		}
-		if (Scale (ds->siz2 - ds->siz1, (x2 + x1)/2 - ds->sx1, ds->sx2 - ds->sx1) + ds->siz1 < vis->idepth)
+		if ((ds->siz2 - ds->siz1) * ((x2 + x1)/2 - ds->sx1) / (ds->sx2 - ds->sx1) + ds->siz1 < vis->idepth)
 		{
 			// [ZZ] only draw stuff that's inside the same portal as the particle, other portals will care for themselves
 			if (ds->CurrentPortalUniq == vis->CurrentPortalUniq)
@@ -2613,8 +2597,8 @@ void R_DrawParticle (vissprite_t *vis)
 	BYTE *dest;
 	DWORD fg;
 	BYTE color = vis->Style.colormap[vis->startfrac];
-	int yl = vis->gzb;
-	int ycount = vis->gzt - yl + 1;
+	int yl = vis->y1;
+	int ycount = vis->y2 - yl + 1;
 	int x1 = vis->x1;
 	int countbase = vis->x2 - x1;
 
@@ -2658,7 +2642,7 @@ void R_DrawParticle (vissprite_t *vis)
 	for (int x = x1; x < (x1+countbase); x++)
 	{
 		dc_x = x;
-		if (R_ClipSpriteColumnWithPortals(vis->gx, vis->gy, vis))
+		if (R_ClipSpriteColumnWithPortals(vis))
 			continue;
 		dest = ylookup[yl] + x + dc_destorg;
 		for (int y = 0; y < ycount; y++)
@@ -2671,10 +2655,10 @@ void R_DrawParticle (vissprite_t *vis)
 	}
 }
 
-extern fixed_t baseyaspectmul;
+extern double BaseYaspectMul;;
 
-void R_DrawVoxel(fixed_t globalposx, fixed_t globalposy, fixed_t globalposz, angle_t viewang,
-	fixed_t dasprx, fixed_t daspry, fixed_t dasprz, angle_t dasprang,
+void R_DrawVoxel(const FVector3 &globalpos, FAngle viewangle,
+	const FVector3 &dasprpos, angle_t dasprang,
 	fixed_t daxscale, fixed_t dayscale, FVoxel *voxobj,
 	lighttable_t *colormap, short *daumost, short *dadmost, int minslabz, int maxslabz, int flags)
 {
@@ -2689,24 +2673,25 @@ void R_DrawVoxel(fixed_t globalposx, fixed_t globalposy, fixed_t globalposz, ang
 	int z1a[64], z2a[64], yplc[64];
 
 	const int nytooclose = centerxwide * 2100, nytoofar = 32768*32768 - 1048576;
-	const int xdimenscale = Scale(centerxwide, yaspectmul, 160);
+	const int xdimenscale = FLOAT2FIXED(centerxwide * YaspectMul / 160);
 	const double centerxwide_f = centerxwide;
 	const double centerxwidebig_f = centerxwide_f * 65536*65536*8;
 
 	// Convert to Build's coordinate system.
-	globalposx =  globalposx >> 12;
-	globalposy = -globalposy >> 12;
-	globalposz = -globalposz >> 8;
+	fixed_t globalposx = xs_Fix<4>::ToFix(globalpos.X);
+	fixed_t globalposy = xs_Fix<4>::ToFix(-globalpos.Y);
+	fixed_t globalposz = xs_Fix<8>::ToFix(-globalpos.Z);
 
-	dasprx =  dasprx >> 12;
-	daspry = -daspry >> 12;
-	dasprz = -dasprz >> 8;
+	fixed_t dasprx = xs_Fix<4>::ToFix(dasprpos.X);
+	fixed_t daspry = xs_Fix<4>::ToFix(-dasprpos.Y);
+	fixed_t dasprz = xs_Fix<8>::ToFix(-dasprpos.Z);
 
 	// Shift the scales from 16 bits of fractional precision to 6.
 	// Also do some magic voodoo scaling to make them the right size.
 	daxscale = daxscale / (0xC000 >> 6);
 	dayscale = dayscale / (0xC000 >> 6);
 
+	angle_t viewang = viewangle.BAMs();
 	cosang = finecosine[viewang >> ANGLETOFINESHIFT] >> 2;
 	sinang = -finesine[viewang >> ANGLETOFINESHIFT] >> 2;
 	sprcosang = finecosine[dasprang >> ANGLETOFINESHIFT] >> 2;
@@ -2717,7 +2702,7 @@ void R_DrawVoxel(fixed_t globalposx, fixed_t globalposy, fixed_t globalposz, ang
 	// Select mip level
 	i = abs(DMulScale6(dasprx - globalposx, cosang, daspry - globalposy, sinang));
 	i = DivScale6(i, MIN(daxscale, dayscale));
-	j = FocalLengthX >> 3;
+	j = xs_Fix<13>::ToFix(FocalLengthX);
 	for (k = 0; i >= j && k < voxobj->NumMips; ++k)
 	{
 		i >>= 1;
@@ -2730,8 +2715,8 @@ void R_DrawVoxel(fixed_t globalposx, fixed_t globalposy, fixed_t globalposz, ang
 	maxslabz >>= k;
 
 	daxscale <<= (k+8); dayscale <<= (k+8);
-	dazscale = FixedDiv(dayscale, baseyaspectmul);
-	daxscale = FixedDiv(daxscale, yaspectmul);
+	dazscale = FixedDiv(dayscale, FLOAT2FIXED(BaseYaspectMul));
+	daxscale = fixed_t(daxscale / YaspectMul);
 	daxscale = Scale(daxscale, xdimenscale, centerxwide << 9);
 	dayscale = Scale(dayscale, FixedMul(xdimenscale, viewingrangerecip), centerxwide << 9);
 

src/r_things.h

@@ -32,13 +32,17 @@
 struct vissprite_t
 {
 	short			x1, x2;
-	fixed_t			gx, gy, gz;		// origin in world coordinates
+	FVector3		gpos;			// origin in world coordinates
+	union
+	{
+		float		gzb, gzt;		// global bottom / top for silhouette clipping
+		int			y1, y2;			// top / bottom of particle on screen
+	};
 	angle_t			angle;
-	fixed_t			gzb, gzt;		// global bottom / top for silhouette clipping
 	fixed_t			xscale, yscale;
-	fixed_t			depth;
-	fixed_t			idepth;			// 1/z
-	fixed_t			deltax, deltay;
+	float			depth;
+	float			idepth;			// 1/z
+	float			deltax, deltay;
 	DWORD			FillColor;
 	fixed_t			floorclip;
 	union
@@ -63,8 +67,8 @@ struct vissprite_t
 		// Used by voxels
 		struct
 		{
-			fixed_t vx, vy, vz;		// view origin
-			angle_t vang;			// view angle
+			FVector3 vpos;			// view origin
+			FAngle vang;			// view angle
 		};
 	};
 	sector_t		*heightsec;		// killough 3/27/98: height sector for underwater/fake ceiling
@@ -81,6 +85,9 @@ struct vissprite_t
 	DWORD			Translation;	// [RH] for color translation
 	visstyle_t		Style;
 	int				CurrentPortalUniq; // [ZZ] to identify the portal that this thing is in. used for clipping.
+
+	vissprite_t() {}
+	vissprite_t &vissprite_t::operator= (const vissprite_t &o) { memcpy(this, &o, sizeof *this); return *this; }
 };
 
 struct particle_t;
@@ -128,9 +135,9 @@ void R_CheckOffscreenBuffer(int width, int height, bool spansonly);
 
 enum { DVF_OFFSCREEN = 1, DVF_SPANSONLY = 2, DVF_MIRRORED = 4 };
 
-void R_DrawVoxel(fixed_t viewx, fixed_t viewy, fixed_t viewz, angle_t viewangle,
-	fixed_t dasprx, fixed_t daspry, fixed_t dasprz, angle_t dasprang,
-	fixed_t daxscale, fixed_t dayscale, FVoxel *voxobj,
+void R_DrawVoxel(const FVector3 &viewpos, FAngle viewangle,
+	const FVector3 &sprpos, angle_t dasprang,
+	fixed_t daxscale, fixed_t dayscale, struct FVoxel *voxobj,
 	lighttable_t *colormap, short *daumost, short *dadmost, int minslabz, int maxslabz, int flags);
 
 void R_ClipVisSprite (vissprite_t *vis, int xl, int xh);

src/r_utility.cpp

@@ -123,8 +123,8 @@ int				otic;
 
 sector_t		*viewsector;
 
-fixed_t 		viewcos, viewtancos;
-fixed_t 		viewsin, viewtansin;
+double	 		ViewCos, ViewTanCos;
+double	 		ViewSin, ViewTanSin;
 
 AActor			*camera;	// [RH] camera to draw from. doesn't have to be a player
 
@@ -142,7 +142,7 @@ int				WidescreenRatio;
 int				setblocks;
 int				extralight;
 bool			setsizeneeded;
-fixed_t			FocalTangent;
+double			FocalTangent;
 
 unsigned int	R_OldBlend = ~0;
 int 			validcount = 1; 	// increment every time a check is made
@@ -150,9 +150,8 @@ int				FieldOfView = 2048;		// Fineangles in the SCREENWIDTH wide window
 
 FCanvasTextureInfo *FCanvasTextureInfo::List;
 
-fixed_t viewx, viewy, viewz;
-angle_t viewangle;
-int viewpitch;
+DVector3a view;
+DAngle viewpitch;
 
 
 // CODE --------------------------------------------------------------------
@@ -463,7 +462,7 @@ void R_SetWindow (int windowSize, int fullWidth, int fullHeight, int stHeight)
 			fov = 170*FINEANGLES/360;
 	}
 
-	FocalTangent = finetangent[FINEANGLES/4+fov/2];
+	FocalTangent = FIXED2FLOAT(finetangent[FINEANGLES/4+fov/2]);
 	Renderer->SetWindow(windowSize, fullWidth, fullHeight, stHeight, trueratio);
 }
 
@@ -737,11 +736,11 @@ void R_ResetViewInterpolation ()
 
 void R_SetViewAngle ()
 {
-	viewsin = FLOAT2FIXED(ViewAngle.Sin());
-	viewcos = FLOAT2FIXED(ViewAngle.Cos());
+	ViewSin = ViewAngle.Sin();
+	ViewCos = ViewAngle.Cos();
 
-	viewtansin = FixedMul (FocalTangent, viewsin);
-	viewtancos = FixedMul (FocalTangent, viewcos);
+	ViewTanSin = FocalTangent * ViewSin;
+	ViewTanCos = FocalTangent * ViewCos;
 }
 
 //==========================================================================
@@ -1108,12 +1107,6 @@ void R_SetupFrame (AActor *actor)
 		}
 	}
 
-	viewx = FLOAT2FIXED(ViewPos.X);
-	viewy = FLOAT2FIXED(ViewPos.Y);
-	viewz = FLOAT2FIXED(ViewPos.Z);
-	viewangle = ViewAngle.BAMs();
-	viewpitch = ViewPitch.BAMs();
-
 	Renderer->CopyStackedViewParameters();
 	Renderer->SetupFrame(player);
 

src/r_utility.h

@@ -17,18 +17,14 @@ extern DAngle			ViewAngle;
 extern DAngle			ViewPitch;
 extern DVector3			ViewPath[2];
 
-extern fixed_t viewx, viewy, viewz;
-extern angle_t viewangle;
-extern int viewpitch;
-
 extern "C" int			centerx, centerxwide;
 extern "C" int			centery;
 
 extern int				setblocks;
 
-extern fixed_t			viewtancos;
-extern fixed_t			viewtansin;
-extern fixed_t			FocalTangent;
+extern double			ViewTanCos;
+extern double			ViewTanSin;
+extern double			FocalTangent;
 
 extern bool				r_NoInterpolate;
 extern int				validcount;

src/v_draw.cpp

@@ -199,8 +199,8 @@ void DCanvas::DrawTextureParms(FTexture *img, DrawParms &parms)
 			unmaskedSpan[1].Length = 0;
 		}
 
-		fixed_t centeryback = centeryfrac;
-		centeryfrac = 0;
+		double centeryback = CenterY;
+		CenterY = 0;
 
 		sprtopscreen = FLOAT2FIXED(y0);
 		// There is not enough precision in the drawing routines to keep the full
@@ -225,7 +225,7 @@ void DCanvas::DrawTextureParms(FTexture *img, DrawParms &parms)
 		//dc_texturemid = FLOAT2FIXED((-y0) * iyscale);
 		//dc_iscale = 0xffffffffu / (unsigned)spryscale;
 		dc_iscale = DivScale32(1, spryscale);
-		dc_texturemid = FixedMul(-sprtopscreen, dc_iscale) + FixedMul(centeryfrac-FRACUNIT, dc_iscale);
+		dc_texturemid = FixedMul(-sprtopscreen, dc_iscale) + xs_ToInt((CenterY - 1) * dc_iscale);
 		fixed_t frac = 0;
 		double xiscale = img->GetWidth() / parms.destwidth;
 		double x2 = x0 + parms.destwidth;
@@ -325,7 +325,7 @@ void DCanvas::DrawTextureParms(FTexture *img, DrawParms &parms)
 				frac += xiscale_i;
 			}
 		}
-		centeryfrac = centeryback;
+		CenterY = centeryback;
 	}
 	R_FinishSetPatchStyle ();