diff --git a/src/actor.h b/src/actor.h
index 3f2577a59..75574f457 100644
--- a/src/actor.h
+++ b/src/actor.h
@@ -1193,15 +1193,6 @@ public:
 
 	bool HasSpecialDeathStates () const;
 
-	fixed_t _f_X() const
-	{
-		return FLOAT2FIXED(__Pos.X);
-	}
-	fixed_t _f_Y() const
-	{
-		return FLOAT2FIXED(__Pos.Y);
-	}
-
 	double X() const
 	{
 		return __Pos.X;
@@ -1274,23 +1265,11 @@ public:
 		if (!moving) Prev.Z = Z();
 	}
 
-	// These are not for general use as they do not link the actor into the world!
-	void SetXY(fixed_t xx, fixed_t yy)
-	{
-		__Pos.X = FIXED2DBL(xx);
-		__Pos.Y = FIXED2DBL(yy);
-	}
 	void SetXY(const DVector2 &npos)
 	{
 		__Pos.X = npos.X;
 		__Pos.Y = npos.Y;
 	}
-	void SetXYZ(fixed_t xx, fixed_t yy, fixed_t zz)
-	{
-		__Pos.X = FIXED2DBL(xx);
-		__Pos.Y = FIXED2DBL(yy);
-		__Pos.Z = FIXED2DBL(zz);
-	}
 	void SetXYZ(double xx, double yy, double zz)
 	{
 		__Pos = { xx,yy,zz };
diff --git a/src/am_map.cpp b/src/am_map.cpp
index e71177860..d84da2ebd 100644
--- a/src/am_map.cpp
+++ b/src/am_map.cpp
@@ -1931,7 +1931,7 @@ void AM_drawSubsectors()
 		sector_t *sec = Renderer->FakeFlat(subsectors[i].render_sector, &tempsec, &floorlight, &ceilinglight, false);
 		// Find texture origin.
 		originpt.x = -sec->GetXOffsetF(sector_t::floor);
-		originpt.y = sec->GetYOffset(sector_t::floor);
+		originpt.y = sec->GetYOffsetF(sector_t::floor);
 		rotation = -sec->GetAngleF(sector_t::floor);
 		// Coloring for the polygon
 		colormap = sec->ColorMap;
@@ -1953,13 +1953,13 @@ void AM_drawSubsectors()
 			double secx;
 			double secy;
 			double seczb, seczt;
-			double cmpz = FIXED2DBL(viewz);
+			double cmpz = ViewPos.Z;
 
 			if (players[consoleplayer].camera && sec == players[consoleplayer].camera->Sector)
 			{
 				// For the actual camera sector use the current viewpoint as reference.
-				secx = FIXED2DBL(viewx);
-				secy = FIXED2DBL(viewy);
+				secx = ViewPos.X;
+				secy = ViewPos.Y;
 			}
 			else
 			{
@@ -3011,7 +3011,7 @@ void AM_drawAuthorMarkers ()
 				 marked->subsector->flags & SSECF_DRAWN :
 				 marked->Sector->MoreFlags & SECF_DRAWN)))
 			{
-				DrawMarker (tex, marked->X(), marked->Y(), 0, flip, mark->Scale.X, mark->Scale.Y, mark->Translation,
+				DrawMarker (tex, marked->X(), marked->Y(), 0, flip, mark->Scale.X*16, mark->Scale.Y*16, mark->Translation,
 					mark->Alpha, mark->fillcolor, mark->RenderStyle);
 			}
 			marked = mark->args[0] != 0 ? it.Next() : NULL;
diff --git a/src/fragglescript/t_func.cpp b/src/fragglescript/t_func.cpp
index 163a6b73b..41f740dda 100644
--- a/src/fragglescript/t_func.cpp
+++ b/src/fragglescript/t_func.cpp
@@ -1782,7 +1782,7 @@ public:
 		m_Type = DCeiling::ceilLowerByValue;	// doesn't really matter as long as it's no special value
 		m_Tag=tag;			
 		m_TopHeight=m_BottomHeight=sec->ceilingplane.PointToDist(sec->centerspot,destheight);
-		m_Direction=destheight>sec->GetPlaneTexZ(sector_t::ceiling)? 1:-1;
+		m_Direction=destheight>sec->GetPlaneTexZF(sector_t::ceiling)? 1:-1;
 
 		// Do not interpolate instant movement ceilings.
 		double movedist = fabs(sec->ceilingplane.fD() - m_BottomHeight);
diff --git a/src/m_fixed.h b/src/m_fixed.h
index 1a2e8b780..506b9702c 100644
--- a/src/m_fixed.h
+++ b/src/m_fixed.h
@@ -156,6 +156,11 @@ inline double AngleToFloat(unsigned f)
 	return f * (90. / 0x40000000);
 }
 
+inline double AngleToFloat(int f)
+{
+	return f * (90. / 0x40000000);
+}
+
 #define FLOAT2FIXED(f)		FloatToFixed(f)
 #define FIXED2FLOAT(f)		float(FixedToFloat(f))
 #define FIXED2DBL(f)		FixedToFloat(f)
diff --git a/src/p_ceiling.cpp b/src/p_ceiling.cpp
index 096333bbb..00af933ef 100644
--- a/src/p_ceiling.cpp
+++ b/src/p_ceiling.cpp
@@ -205,7 +205,7 @@ void DCeiling::Tick ()
 				case ceilCrushAndRaise:
 				case ceilLowerAndCrush:
 					if (m_CrushMode == ECrushMode::crushSlowdown)
-						m_Speed = FRACUNIT / 8;
+						m_Speed = 1. / 8;
 						break;
 
 				default:
diff --git a/src/p_doors.cpp b/src/p_doors.cpp
index 24af77194..ba2fba399 100644
--- a/src/p_doors.cpp
+++ b/src/p_doors.cpp
@@ -254,7 +254,7 @@ void DDoor::DoorSound(bool raise, DSeqNode *curseq) const
 
 	if (m_Sector->Flags & SECF_SILENTMOVE) return;
 
-	if (m_Speed >= FRACUNIT*8)
+	if (m_Speed >= 8)
 	{
 		choice += 2;
 	}
diff --git a/src/p_effect.cpp b/src/p_effect.cpp
index e84cf8e3c..249ba80f9 100644
--- a/src/p_effect.cpp
+++ b/src/p_effect.cpp
@@ -149,15 +149,16 @@ CUSTOM_CVAR( Int, r_maxparticles, 4000, CVAR_ARCHIVE )
 void P_InitParticles ()
 {
 	const char *i;
+	int num;
 
 	if ((i = Args->CheckValue ("-numparticles")))
-		NumParticles = atoi (i);
+		num = atoi (i);
 	// [BC] Use r_maxparticles now.
 	else
-		NumParticles = r_maxparticles;
+		num = r_maxparticles;
 
 	// This should be good, but eh...
-	NumParticles = clamp<WORD>(NumParticles, 100, 65535);
+	NumParticles = (WORD)clamp<int>(num, 100, 65535);
 
 	P_DeinitParticles();
 	Particles = new particle_t[NumParticles];
@@ -206,7 +207,7 @@ void P_FindParticleSubsectors ()
 	for (WORD i = ActiveParticles; i != NO_PARTICLE; i = Particles[i].tnext)
 	{
 		 // Try to reuse the subsector from the last portal check, if still valid.
-		if (Particles[i].subsector == NULL) Particles[i].subsector = R_PointInSubsector(Particles[i].x, Particles[i].y);
+		if (Particles[i].subsector == NULL) Particles[i].subsector = R_PointInSubsector(Particles[i].Pos);
 		int ssnum = int(Particles[i].subsector - subsectors);
 		Particles[i].snext = ParticlesInSubsec[ssnum];
 		ParticlesInSubsec[ssnum] = i;
@@ -279,33 +280,29 @@ void P_ThinkParticles ()
 			continue;
 		}
 
-		DVector2 newxy = P_GetOffsetPosition(FIXED2DBL(particle->x), FIXED2DBL(particle->y), FIXED2DBL(particle->vel.x), FIXED2DBL(particle->vel.y));
-		particle->x = FLOAT2FIXED(newxy.X);
-		particle->y = FLOAT2FIXED(newxy.Y);
-		//particle->x += particle->vel.x;
-		//particle->y += particle->vel.y;
-		particle->z += particle->vel.z;
-		particle->vel.x += particle->accx;
-		particle->vel.y += particle->accy;
-		particle->vel.z += particle->accz;
-		particle->subsector = R_PointInSubsector(particle->x, particle->y);
+		// Handle crossing a line portal
+		DVector2 newxy = P_GetOffsetPosition(particle->Pos.X, particle->Pos.Y, particle->Vel.X, particle->Vel.Y);
+		particle->Pos.X = newxy.X;
+		particle->Pos.Y = newxy.Y;
+		particle->Pos.Z += particle->Vel.Z;
+		particle->Vel += particle->Acc;
+		particle->subsector = R_PointInSubsector(particle->Pos);
+		// Handle crossing a sector portal.
 		if (!particle->subsector->sector->PortalBlocksMovement(sector_t::ceiling))
 		{
 			AActor *skybox = particle->subsector->sector->SkyBoxes[sector_t::ceiling];
-			if (particle->z > FLOAT2FIXED(skybox->specialf1))
+			if (particle->Pos.Z > skybox->specialf1)
 			{
-				particle->x += FLOAT2FIXED(skybox->Scale.X);
-				particle->y += FLOAT2FIXED(skybox->Scale.Y);
+				particle->Pos += skybox->Scale;
 				particle->subsector = NULL;
 			}
 		}
 		else if (!particle->subsector->sector->PortalBlocksMovement(sector_t::floor))
 		{
 			AActor *skybox = particle->subsector->sector->SkyBoxes[sector_t::floor];
-			if (particle->z < FLOAT2FIXED(skybox->specialf1))
+			if (particle->Pos.Z < skybox->specialf1)
 			{
-				particle->x += FLOAT2FIXED(skybox->Scale.X);
-				particle->y += FLOAT2FIXED(skybox->Scale.Y);
+				particle->Pos += skybox->Scale;
 				particle->subsector = NULL;
 			}
 		}
@@ -320,20 +317,14 @@ void P_SpawnParticle(const DVector3 &pos, const DVector3 &vel, const DVector3 &a
 
 	if (particle)
 	{
-		particle->x = FLOAT2FIXED(pos.X);
-		particle->y = FLOAT2FIXED(pos.Y);
-		particle->z = FLOAT2FIXED(pos.Z);
-		particle->vel.x = FLOAT2FIXED(vel.X);
-		particle->vel.y = FLOAT2FIXED(vel.Y);
-		particle->vel.z = FLOAT2FIXED(vel.Z);
+		particle->Pos = pos;
+		particle->Vel = vel;
+		particle->Acc = accel;
 		particle->color = ParticleColor(color);
 		particle->trans = BYTE(startalpha*255);
 		if (fadestep < 0) particle->fade = FADEFROMTTL(lifetime);
 		else particle->fade = int(fadestep * 255);
 		particle->ttl = lifetime;
-		particle->accx = FLOAT2FIXED(accel.X);
-		particle->accy = FLOAT2FIXED(accel.Y);
-		particle->accz = FLOAT2FIXED(accel.Z);
 		particle->bright = fullbright;
 		particle->size = (WORD)size;
 	}
@@ -380,15 +371,14 @@ particle_t *JitterParticle (int ttl, double drift)
 	particle_t *particle = NewParticle ();
 
 	if (particle) {
-		fixed_t *val = &particle->vel.x;
 		int i;
 
 		// Set initial velocities
-		for (i = 3; i; i--, val++)
-			*val = (int)((FRACUNIT/4096) * (M_Random () - 128) * drift);
+		for (i = 3; i; i--)
+			particle->Vel[i] = ((1./4096) * (M_Random () - 128) * drift);
 		// Set initial accelerations
-		for (i = 3; i; i--, val++)
-			*val = (int)((FRACUNIT/16384) * (M_Random () - 128) * drift);
+		for (i = 3; i; i--)
+			particle->Acc[i] = ((1./16384) * (M_Random () - 128) * drift);
 
 		particle->trans = 255;	// fully opaque
 		particle->ttl = ttl;
@@ -411,15 +401,12 @@ static void MakeFountain (AActor *actor, int color1, int color2)
 		DAngle an = M_Random() * (360. / 256);
 		double out = actor->radius * M_Random() / 256.;
 
-		DVector3 pos = actor->Vec3Angle(out, an, actor->Height + 1);
-		particle->x = FLOAT2FIXED(pos.X);
-		particle->y = FLOAT2FIXED(pos.Y);
-		particle->z = FLOAT2FIXED(pos.Z);
+		particle->Pos = actor->Vec3Angle(out, an, actor->Height + 1);
 		if (out < actor->radius/8)
-			particle->vel.z += FRACUNIT*10/3;
+			particle->Vel.Z += 10./3;
 		else
-			particle->vel.z += FRACUNIT*3;
-		particle->accz -= FRACUNIT/11;
+			particle->Vel.Z += 3;
+		particle->Acc.Z -= 1./11;
 		if (M_Random() < 30) {
 			particle->size = 4;
 			particle->color = color2;
@@ -445,7 +432,7 @@ void P_RunEffect (AActor *actor, int effects)
 		double backz = actor->Height * ((2. / 3) - actor->Vel.Z / 8);
 
 		DAngle an = moveangle + 90.;
-		int speed;
+		double speed;
 
 		particle = JitterParticle (3 + (M_Random() & 31));
 		if (particle) {
@@ -454,14 +441,12 @@ void P_RunEffect (AActor *actor, int effects)
 				backx - actor->Vel.X * pathdist,
 				backy - actor->Vel.Y * pathdist,
 				backz - actor->Vel.Z * pathdist);
-			particle->x = FLOAT2FIXED(pos.X);
-			particle->y = FLOAT2FIXED(pos.Y);
-			particle->z = FLOAT2FIXED(pos.Z);
-			speed = (M_Random () - 128) * (FRACUNIT/200);
-			particle->vel.x += fixed_t(speed * an.Cos());
-			particle->vel.y += fixed_t(speed * an.Sin());
-			particle->vel.z -= FRACUNIT/36;
-			particle->accz -= FRACUNIT/20;
+			particle->Pos = pos;
+			speed = (M_Random () - 128) * (1./200);
+			particle->Vel.X += speed * an.Cos();
+			particle->Vel.Y += speed * an.Sin();
+			particle->Vel.Z -= 1./36;
+			particle->Acc.Z -= 1./20;
 			particle->color = yellow;
 			particle->size = 2;
 		}
@@ -473,15 +458,13 @@ void P_RunEffect (AActor *actor, int effects)
 					backx - actor->Vel.X * pathdist,
 					backy - actor->Vel.Y * pathdist,
 					backz - actor->Vel.Z * pathdist + (M_Random() / 64.));
-				particle->x = FLOAT2FIXED(pos.X);
-				particle->y = FLOAT2FIXED(pos.Y);
-				particle->z = FLOAT2FIXED(pos.Z);
+				particle->Pos = pos;
 
-				speed = (M_Random () - 128) * (FRACUNIT/200);
-				particle->vel.x += fixed_t(speed * an.Cos());
-				particle->vel.y += fixed_t(speed * an.Sin());
-				particle->vel.z += FRACUNIT/80;
-				particle->accz += FRACUNIT/40;
+				speed = (M_Random () - 128) * (1./200);
+				particle->Vel.X += speed * an.Cos();
+				particle->Vel.Y += speed * an.Sin();
+				particle->Vel.Z -= 1. / 80;
+				particle->Acc.Z -= 1. / 40;
 				if (M_Random () & 7)
 					particle->color = grey2;
 				else
@@ -529,18 +512,16 @@ void P_RunEffect (AActor *actor, int effects)
 			{
 				DAngle ang = M_Random() * (360 / 256.);
 				DVector3 pos = actor->Vec3Angle(actor->radius, ang, 0);
-				particle->x = FLOAT2FIXED(pos.X);
-				particle->y = FLOAT2FIXED(pos.Y);
-				particle->z = FLOAT2FIXED(pos.Z);
+				particle->Pos = pos;
 				particle->color = *protectColors[M_Random() & 1];
-				particle->vel.z = FRACUNIT;
-				particle->accz = M_Random () << 7;
+				particle->Vel.Z = 1;
+				particle->Acc.Z = M_Random () / 512.;
 				particle->size = 1;
 				if (M_Random () < 128)
 				{ // make particle fall from top of actor
-					particle->z += FLOAT2FIXED(actor->Height);
-					particle->vel.z = -particle->vel.z;
-					particle->accz = -particle->accz;
+					particle->Pos.Z += actor->Height;
+					particle->Vel.Z = -particle->Vel.Z;
+					particle->Acc.Z = -particle->Acc.Z;
 				}
 			}
 		}
@@ -570,20 +551,21 @@ void P_DrawSplash (int count, const DVector3 &pos, DAngle angle, int kind)
 
 		p->size = 2;
 		p->color = M_Random() & 0x80 ? color1 : color2;
-		p->vel.z -= M_Random () * 512;
-		p->accz -= FRACUNIT/8;
-		p->accx += (M_Random () - 128) * 8;
-		p->accy += (M_Random () - 128) * 8;
-		p->z = FLOAT2FIXED(pos.Z) - M_Random () * 1024;
+		p->Vel.Z -= M_Random () / 128.;
+		p->Acc.Z -= 1./8;
+		p->Acc.X += (M_Random () - 128) / 8192.;
+		p->Acc.Y += (M_Random () - 128) / 8192.;
+		p->Pos.Z = pos.Z - M_Random () / 64.;
 		angle += M_Random() * (45./256);
-		p->x = FLOAT2FIXED(pos.X + (M_Random() & 15)*angle.Cos());
-		p->y = FLOAT2FIXED(pos.Y + (M_Random() & 15)*angle.Sin());
+		p->Pos.X = pos.X + (M_Random() & 15)*angle.Cos();
+		p->Pos.Y = pos.Y + (M_Random() & 15)*angle.Sin();
 	}
 }
 
 void P_DrawSplash2 (int count, const DVector3 &pos, DAngle angle, int updown, int kind)
 {
-	int color1, color2, zvel, zspread, zadd;
+	int color1, color2, zadd;
+	double zvel, zspread;
 
 	switch (kind)
 	{
@@ -605,14 +587,14 @@ void P_DrawSplash2 (int count, const DVector3 &pos, DAngle angle, int updown, in
 		break;
 	}
 
-	zvel = -128;
-	zspread = updown ? -6000 : 6000;
-	zadd = (updown == 2) ? -128 : 0;
+	zvel = -0.5;
+	zspread = updown ? -6000 / 65536. : 6000 / 65536.;
+	zadd = (updown == 2) ? 128 : 0;
 
 	for (; count; count--)
 	{
 		particle_t *p = NewParticle ();
-		angle_t an;
+		DAngle an;
 
 		if (!p)
 			break;
@@ -622,19 +604,20 @@ void P_DrawSplash2 (int count, const DVector3 &pos, DAngle angle, int updown, in
 		p->trans = 255;
 		p->size = 4;
 		p->color = M_Random() & 0x80 ? color1 : color2;
-		p->vel.z = M_Random () * zvel;
-		p->accz = -FRACUNIT/22;
-		if (kind) {
-			an = (angle.BAMs() + ((M_Random() - 128) << 23)) >> ANGLETOFINESHIFT;
-			p->vel.x = (M_Random () * finecosine[an]) >> 11;
-			p->vel.y = (M_Random () * finesine[an]) >> 11;
-			p->accx = p->vel.x >> 4;
-			p->accy = p->vel.y >> 4;
+		p->Vel.Z = M_Random() * zvel;
+		p->Acc.Z = -1 / 22.;
+		if (kind) 
+		{
+			an = angle + ((M_Random() - 128) * (180 / 256.));
+			p->Vel.X = M_Random() * an.Cos() / 2048.;
+			p->Vel.Y = M_Random() * an.Sin() / 2048.;
+			p->Acc.X = p->Vel.X / 16.;
+			p->Acc.Y = p->Vel.Y / 16.;
 		}
-		p->z = FLOAT2FIXED(pos.Z) + (M_Random () + zadd - 128) * zspread;
-		an = (angle.BAMs() + ((M_Random() - 128) << 22)) >> ANGLETOFINESHIFT;
-		p->x = FLOAT2FIXED(pos.X) + ((M_Random () & 31)-15)*finecosine[an];
-		p->y = FLOAT2FIXED(pos.X) + ((M_Random () & 31)-15)*finesine[an];
+		an = angle + ((M_Random() - 128) * (90 / 256.));
+		p->Pos.X = pos.X + ((M_Random() & 31) - 15) * an.Cos();
+		p->Pos.Y = pos.Y + ((M_Random() & 31) - 15) * an.Sin();
+		p->Pos.Z = pos.Z + (M_Random() + zadd - 128) * zspread;
 	}
 }
 
@@ -692,7 +675,7 @@ void P_DrawRailTrail(AActor *source, const DVector3 &start, const DVector3 &end,
 				point = start + r * dir;
 				dir.Z = dirz;
 
-				S_Sound (DVector3(point.X, point.Y, viewz),	CHAN_WEAPON, sound, 1, ATTN_NORM);
+				S_Sound (DVector3(point.X, point.Y, ViewPos.Z),	CHAN_WEAPON, sound, 1, ATTN_NORM);
 			}
 		}
 	}
@@ -749,13 +732,8 @@ void P_DrawRailTrail(AActor *source, const DVector3 &start, const DVector3 &end,
 			p->bright = fullbright;
 
 			tempvec = DMatrix3x3(dir, deg) * extend;
-			p->vel.x = FLOAT2FIXED(tempvec.X * drift)>>4;
-			p->vel.y = FLOAT2FIXED(tempvec.Y * drift)>>4;
-			p->vel.z = FLOAT2FIXED(tempvec.Z * drift)>>4;
-			tempvec += pos;
-			p->x = FLOAT2FIXED(tempvec.X);
-			p->y = FLOAT2FIXED(tempvec.Y);
-			p->z = FLOAT2FIXED(tempvec.Z);
+			p->Vel = tempvec * drift / 16.;
+			p->Pos = tempvec + pos;
 			pos += spiral_step;
 			deg += double(r_rail_spiralsparsity * 14);
 
@@ -812,11 +790,9 @@ void P_DrawRailTrail(AActor *source, const DVector3 &start, const DVector3 &end,
 			DVector3 postmp = pos + diff;
 
 			p->size = 2;
-			p->x = FLOAT2FIXED(postmp.X);
-			p->y = FLOAT2FIXED(postmp.Y);
-			p->z = FLOAT2FIXED(postmp.Z);
+			p->Pos = postmp;
 			if (color1 != -1)
-				p->accz -= FRACUNIT/4096;
+				p->Acc.Z -= 1./4096;
 			pos += trail_step;
 
 			p->bright = fullbright;
@@ -888,10 +864,8 @@ void P_DisconnectEffect (AActor *actor)
 		double zo = M_Random()*actor->Height / 256;
 
 		DVector3 pos = actor->Vec3Offset(xo, yo, zo);
-		p->x = FLOAT2FIXED(pos.X);
-		p->y = FLOAT2FIXED(pos.Y);
-		p->z = FLOAT2FIXED(pos.Z);
-		p->accz -= FRACUNIT/4096;
+		p->Pos = pos;
+		p->Acc.Z -= 1./4096;
 		p->color = M_Random() < 128 ? maroon1 : maroon2;
 		p->size = 4;
 	}
diff --git a/src/p_effect.h b/src/p_effect.h
index cea9b2fdf..fad9012d0 100644
--- a/src/p_effect.h
+++ b/src/p_effect.h
@@ -52,21 +52,16 @@
 struct subsector_t;
 
 // [RH] Particle details
-struct fixedvec3
-{
-	fixed_t x, y, z;
-};
-
 
 struct particle_t
 {
-	fixed_t	x,y,z;
-	fixedvec3 vel;
-	fixed_t accx,accy,accz;
+	DVector3 Pos;
+	DVector3 Vel;
+	DVector3 Acc;
 	BYTE	ttl;
 	BYTE	trans;
 	WORD	size;
-	BYTE	bright:1;
+	BYTE	bright;
 	BYTE	fade;
 	int		color;
 	WORD	tnext;
diff --git a/src/p_floor.cpp b/src/p_floor.cpp
index 9588e8e1c..9ad68c3b1 100644
--- a/src/p_floor.cpp
+++ b/src/p_floor.cpp
@@ -615,7 +615,7 @@ bool EV_BuildStairs (int tag, DFloor::EStair type, line_t *line,
 		floor->m_PauseTime = 0;
 		floor->m_StepTime = floor->m_PerStepTime = persteptime;
 
-		floor->m_Crush = (!(usespecials & DFloor::stairUseSpecials) && speed == 4*FRACUNIT) ? 10 : -1; //jff 2/27/98 fix uninitialized crush field
+		floor->m_Crush = (!(usespecials & DFloor::stairUseSpecials) && speed == 4) ? 10 : -1; //jff 2/27/98 fix uninitialized crush field
 		floor->m_Hexencrush = false;
 
 		floor->m_Speed = speed;
diff --git a/src/p_linkedsectors.cpp b/src/p_linkedsectors.cpp
index 944a41aa9..9a451460c 100644
--- a/src/p_linkedsectors.cpp
+++ b/src/p_linkedsectors.cpp
@@ -102,7 +102,7 @@ static bool MoveCeiling(sector_t *sector, int crush, double move)
 
 	// Don't let the ceiling go below the floor
 	if (!sector->ceilingplane.isSlope() && !sector->floorplane.isSlope() &&
-		 sector->GetPlaneTexZ(sector_t::floor)  > sector->GetPlaneTexZ(sector_t::ceiling)) return false;
+		 sector->GetPlaneTexZF(sector_t::floor)  > sector->GetPlaneTexZF(sector_t::ceiling)) return false;
 
 	return true;
 }
@@ -116,7 +116,7 @@ static bool MoveFloor(sector_t *sector, int crush, double move)
 
 	// Don't let the floor go above the ceiling
 	if (!sector->ceilingplane.isSlope() && !sector->floorplane.isSlope() &&
-		 sector->GetPlaneTexZ(sector_t::floor) > sector->GetPlaneTexZ(sector_t::ceiling)) return false;
+		 sector->GetPlaneTexZF(sector_t::floor) > sector->GetPlaneTexZF(sector_t::ceiling)) return false;
 
 	return true;
 }
diff --git a/src/p_lnspec.cpp b/src/p_lnspec.cpp
index ff7626eb6..d133b42d7 100644
--- a/src/p_lnspec.cpp
+++ b/src/p_lnspec.cpp
@@ -2186,7 +2186,7 @@ FUNC(LS_Sector_SetTranslucent)
 		FSectorTagIterator itr(arg0);
 		while ((secnum = itr.Next()) >= 0)
 		{
-			sectors[secnum].SetAlpha(arg1, Scale(arg2, OPAQUE, 255));
+			sectors[secnum].SetAlpha(arg1, clamp(arg2, 0, 255) / 255.);
 			sectors[secnum].ChangeFlags(arg1, ~PLANEF_ADDITIVE, arg3? PLANEF_ADDITIVE:0);
 		}
 		return true;
@@ -2465,9 +2465,9 @@ FUNC(LS_Sector_SetFloorScale2)
 	while ((secnum = itr.Next()) >= 0)
 	{
 		if (arg1)
-			sectors[secnum].SetXScale(sector_t::floor, arg1);
+			sectors[secnum].SetXScale(sector_t::floor, xscale);
 		if (arg2)
-			sectors[secnum].SetYScale(sector_t::floor, arg2);
+			sectors[secnum].SetYScale(sector_t::floor, yscale);
 	}
 	return true;
 }
@@ -2487,9 +2487,9 @@ FUNC(LS_Sector_SetCeilingScale2)
 	while ((secnum = itr.Next()) >= 0)
 	{
 		if (arg1)
-			sectors[secnum].SetXScale(sector_t::ceiling, arg1);
+			sectors[secnum].SetXScale(sector_t::ceiling, xscale);
 		if (arg2)
-			sectors[secnum].SetYScale(sector_t::ceiling, arg2);
+			sectors[secnum].SetYScale(sector_t::ceiling, yscale);
 	}
 	return true;
 }
diff --git a/src/p_local.h b/src/p_local.h
index 4a68c236c..0dd0dca68 100644
--- a/src/p_local.h
+++ b/src/p_local.h
@@ -51,7 +51,6 @@ struct FTranslatedLineTarget;
 // mapblocks are used to check movement
 // against lines and things
 #define MAPBLOCKUNITS	128
-#define MAPBLOCKSIZE	(MAPBLOCKUNITS*FRACUNIT)
 
 // Inspired by Maes
 extern int bmapnegx;
diff --git a/src/p_map.cpp b/src/p_map.cpp
index e6b189d7b..f757f089c 100644
--- a/src/p_map.cpp
+++ b/src/p_map.cpp
@@ -2220,7 +2220,7 @@ bool P_TryMove(AActor *thing, const DVector2 &pos,
 			// so that the renderer can properly calculate an interpolated position along the movement path.
 			if (thing == players[consoleplayer].camera)
 			{
-				divline_t dl1 = { besthit.Oldrefpos.X,besthit.Oldrefpos.Y, besthit.Refpos.X - besthit.Oldrefpos.Y, besthit.Refpos.Y - besthit.Oldrefpos.Y };
+				divline_t dl1 = { besthit.Oldrefpos.X,besthit.Oldrefpos.Y, besthit.Refpos.X - besthit.Oldrefpos.X, besthit.Refpos.Y - besthit.Oldrefpos.Y };
 				DVector3a hit = { {dl1.x + dl1.dx * bestfrac, dl1.y + dl1.dy * bestfrac, 0.},0. };
 
 				R_AddInterpolationPoint(hit);
diff --git a/src/p_maputl.cpp b/src/p_maputl.cpp
index 8c03674af..6279a054f 100644
--- a/src/p_maputl.cpp
+++ b/src/p_maputl.cpp
@@ -1456,7 +1456,7 @@ void FPathTraverse::init(double x1, double y1, double x2, double y2, int flags,
 	if (flags & PT_DELTA)
 	{
 		x2 += x1;
-		y2 += y2;
+		y2 += y1;
 	}
 
 	x1 -= bmaporgx;
@@ -1469,10 +1469,10 @@ void FPathTraverse::init(double x1, double y1, double x2, double y2, int flags,
 	xt2 = x2 / MAPBLOCKUNITS;
 	yt2 = y2 / MAPBLOCKUNITS;
 
-	mapx = int(xt1);
-	mapy = int(yt1);
-	int mapex = int(xt2);
-	int mapey = int(yt2);
+	mapx = xs_FloorToInt(xt1);
+	mapy = xs_FloorToInt(yt1);
+	int mapex = xs_FloorToInt(xt2);
+	int mapey = xs_FloorToInt(yt2);
 
 
 	if (mapex > mapx)
@@ -1563,7 +1563,7 @@ void FPathTraverse::init(double x1, double y1, double x2, double y2, int flags,
 		}
 
 		// [RH] Handle corner cases properly instead of pretending they don't exist.
-		switch (((int(yintercept) == mapy) << 1) | (int(xintercept) == mapx))
+		switch (((xs_FloorToInt(yintercept) == mapy) << 1) | (xs_FloorToInt(xintercept) == mapx))
 		{
 		case 0:		// neither xintercept nor yintercept match!
 			count = 100;	// Stop traversing, because somebody screwed up.
diff --git a/src/p_maputl.h b/src/p_maputl.h
index d53ab49a7..e075f5f6d 100644
--- a/src/p_maputl.h
+++ b/src/p_maputl.h
@@ -38,12 +38,12 @@ struct intercept_t
 
 inline int P_PointOnLineSidePrecise(double x, double y, const line_t *line)
 {
-	return (y - line->v1->fY()) * line->Delta().X + (line->v1->fX() - x) * line->Delta().Y > -EQUAL_EPSILON;
+	return (y - line->v1->fY()) * line->Delta().X + (line->v1->fX() - x) * line->Delta().Y > EQUAL_EPSILON;
 }
 
 inline int P_PointOnLineSidePrecise(const DVector2 &pt, const line_t *line)
 {
-	return (pt.Y - line->v1->fY()) * line->Delta().X + (line->v1->fX() - pt.X) * line->Delta().Y > -EQUAL_EPSILON;
+	return (pt.Y - line->v1->fY()) * line->Delta().X + (line->v1->fX() - pt.X) * line->Delta().Y > EQUAL_EPSILON;
 }
 
 inline int P_PointOnLineSide (double x, double y, const line_t *line)
@@ -73,12 +73,12 @@ inline int P_PointOnLineSide(const DVector2 & p, const line_t *line)
 
 inline int P_PointOnDivlineSide(double x, double y, const divline_t *line)
 {
-	return (y - line->y) * line->dx + (line->x - x) * line->dy > -EQUAL_EPSILON;
+	return (y - line->y) * line->dx + (line->x - x) * line->dy > EQUAL_EPSILON;
 }
 
 inline int P_PointOnDivlineSide(const DVector2 &pos, const divline_t *line)
 {
-	return (pos.Y - line->y) * line->dx + (line->x - pos.X) * line->dy > -EQUAL_EPSILON;
+	return (pos.Y - line->y) * line->dx + (line->x - pos.X) * line->dy > EQUAL_EPSILON;
 }
 
 //==========================================================================
diff --git a/src/p_setup.cpp b/src/p_setup.cpp
index 6c6b05d0a..c7395208e 100644
--- a/src/p_setup.cpp
+++ b/src/p_setup.cpp
@@ -1220,10 +1220,8 @@ void P_LoadSegs (MapData * map)
 	BYTE *vertchanged = new BYTE[numvertexes];	// phares 10/4/98
 	DWORD segangle;
 	line_t* line;		// phares 10/4/98
-	int ptp_angle;		// phares 10/4/98
-	int delta_angle;	// phares 10/4/98
-	int dis;			// phares 10/4/98
-	int dx,dy;			// phares 10/4/98
+	//int ptp_angle;		// phares 10/4/98
+	//int delta_angle;	// phares 10/4/98
 	int vnum1,vnum2;	// phares 10/4/98
 	int lumplen = map->Size(ML_SEGS);
 
@@ -1315,30 +1313,26 @@ void P_LoadSegs (MapData * map)
 			// off, then move one vertex. This may seem insignificant, but one degree
 			// errors _can_ cause firelines.
 
-			ptp_angle = R_PointToAngle2 (li->v1->fixX(), li->v1->fixY(), li->v2->fixX(), li->v2->fixY());
-			dis = 0;
-			delta_angle = (absangle(ptp_angle-(segangle<<16))>>ANGLETOFINESHIFT)*360/FINEANGLES;
+			DAngle ptp_angle = (li->v2->fPos() - li->v1->fPos()).Angle();
+			DAngle seg_angle = AngleToFloat(segangle);
+			DAngle delta_angle = absangle(ptp_angle, seg_angle);
 
-			if (delta_angle != 0)
+			if (delta_angle >= 1.)
 			{
-				segangle >>= (ANGLETOFINESHIFT-16);
-				dx = (li->v1->fixX() - li->v2->fixX())>>FRACBITS;
-				dy = (li->v1->fixY() - li->v2->fixY())>>FRACBITS;
-				dis = ((int) g_sqrt((double)(dx*dx + dy*dy)))<<FRACBITS;
-				dx = finecosine[segangle];
-				dy = finesine[segangle];
+				double dis = (li->v2->fPos() - li->v1->fPos()).Length();
+				DVector2 delta = seg_angle.ToVector();
 				if ((vnum2 > vnum1) && (vertchanged[vnum2] == 0))
 				{
 					li->v2->set(
-						li->v1->fixX() + FixedMul(dis,dx),
-						li->v1->fixY() + FixedMul(dis,dy));
+						li->v1->fX() + dis * delta.X,
+						li->v1->fY() + dis * delta.Y);
 					vertchanged[vnum2] = 1; // this was changed
 				}
 				else if (vertchanged[vnum1] == 0)
 				{
 					li->v1->set(
-						li->v2->fixX() - FixedMul(dis,dx),
-						li->v2->fixY() - FixedMul(dis,dy));
+						li->v2->fX() - dis * delta.X,
+						li->v2->fY() - dis * delta.Y);
 					vertchanged[vnum1] = 1; // this was changed
 				}
 			}
@@ -1506,10 +1500,10 @@ void P_LoadSectors (MapData *map, FMissingTextureTracker &missingtex)
 	{
 		ss->e = &sectors[0].e[i];
 		if (!map->HasBehavior) ss->Flags |= SECF_FLOORDROP;
-		ss->SetPlaneTexZ(sector_t::floor, LittleShort(ms->floorheight)<<FRACBITS);
-		ss->floorplane.set(0, 0, FRACUNIT, -ss->GetPlaneTexZ(sector_t::floor));
-		ss->SetPlaneTexZ(sector_t::ceiling, LittleShort(ms->ceilingheight)<<FRACBITS);
-		ss->ceilingplane.set(0, 0, -FRACUNIT, ss->GetPlaneTexZ(sector_t::ceiling));
+		ss->SetPlaneTexZ(sector_t::floor, (double)LittleShort(ms->floorheight));
+		ss->floorplane.set(0, 0, 1., -ss->GetPlaneTexZF(sector_t::floor));
+		ss->SetPlaneTexZ(sector_t::ceiling, (double)LittleShort(ms->ceilingheight));
+		ss->ceilingplane.set(0, 0, -1., ss->GetPlaneTexZF(sector_t::ceiling));
 		SetTexture(ss, i, sector_t::floor, ms->floorpic, missingtex, true);
 		SetTexture(ss, i, sector_t::ceiling, ms->ceilingpic, missingtex, true);
 		ss->lightlevel = LittleShort(ms->lightlevel);
@@ -1525,12 +1519,12 @@ void P_LoadSectors (MapData *map, FMissingTextureTracker &missingtex)
 		ss->nextsec = -1;	//jff 2/26/98 add fields to support locking out
 		ss->prevsec = -1;	// stair retriggering until build completes
 
-		ss->SetAlpha(sector_t::floor, OPAQUE);
-		ss->SetAlpha(sector_t::ceiling, OPAQUE);
-		ss->SetXScale(sector_t::floor, FRACUNIT);	// [RH] floor and ceiling scaling
-		ss->SetYScale(sector_t::floor, FRACUNIT);
-		ss->SetXScale(sector_t::ceiling, FRACUNIT);
-		ss->SetYScale(sector_t::ceiling, FRACUNIT);
+		ss->SetAlpha(sector_t::floor, 1.);
+		ss->SetAlpha(sector_t::ceiling, 1.);
+		ss->SetXScale(sector_t::floor, 1.);	// [RH] floor and ceiling scaling
+		ss->SetYScale(sector_t::floor, 1.);
+		ss->SetXScale(sector_t::ceiling, 1.);
+		ss->SetYScale(sector_t::ceiling, 1.);
 
 		ss->heightsec = NULL;	// sector used to get floor and ceiling height
 		// killough 3/7/98: end changes
@@ -2011,8 +2005,8 @@ void P_FinishLoadingLineDef(line_t *ld, int alpha)
 
 	ld->frontsector = ld->sidedef[0] != NULL ? ld->sidedef[0]->sector : NULL;
 	ld->backsector  = ld->sidedef[1] != NULL ? ld->sidedef[1]->sector : NULL;
-	double dx = FIXED2DBL(ld->v2->fixX() - ld->v1->fixX());
-	double dy = FIXED2DBL(ld->v2->fixY() - ld->v1->fixY());
+	double dx = (ld->v2->fX() - ld->v1->fX());
+	double dy = (ld->v2->fY() - ld->v1->fY());
 	int linenum = int(ld-lines);
 
 	if (ld->frontsector == NULL)
@@ -2137,8 +2131,8 @@ void P_LoadLineDefs (MapData * map)
 			I_Error ("Line %d has invalid vertices: %d and/or %d.\nThe map only contains %d vertices.", i+skipped, v1, v2, numvertexes);
 		}
 		else if (v1 == v2 ||
-			(vertexes[LittleShort(mld->v1)].fixX() == vertexes[LittleShort(mld->v2)].fixX() &&
-			 vertexes[LittleShort(mld->v1)].fixY() == vertexes[LittleShort(mld->v2)].fixY()))
+			(vertexes[LittleShort(mld->v1)].fX() == vertexes[LittleShort(mld->v2)].fX() &&
+			 vertexes[LittleShort(mld->v1)].fY() == vertexes[LittleShort(mld->v2)].fY()))
 		{
 			Printf ("Removing 0-length line %d\n", i+skipped);
 			memmove (mld, mld+1, sizeof(*mld)*(numlines-i-1));
@@ -2226,8 +2220,8 @@ void P_LoadLineDefs2 (MapData * map)
 		mld = ((maplinedef2_t*)mldf) + i;
 
 		if (mld->v1 == mld->v2 ||
-			(vertexes[LittleShort(mld->v1)].fixX() == vertexes[LittleShort(mld->v2)].fixX() &&
-			 vertexes[LittleShort(mld->v1)].fixY() == vertexes[LittleShort(mld->v2)].fixY()))
+			(vertexes[LittleShort(mld->v1)].fX() == vertexes[LittleShort(mld->v2)].fX() &&
+			 vertexes[LittleShort(mld->v1)].fY() == vertexes[LittleShort(mld->v2)].fY()))
 		{
 			Printf ("Removing 0-length line %d\n", i+skipped);
 			memmove (mld, mld+1, sizeof(*mld)*(numlines-i-1));
@@ -2782,6 +2776,7 @@ static void P_CreateBlockMap ()
 	TArray<int> *BlockLists, *block, *endblock;
 	int adder;
 	int bmapwidth, bmapheight;
+	double dminx, dmaxx, dminy, dmaxy;
 	int minx, maxx, miny, maxy;
 	int i;
 	int line;
@@ -2790,21 +2785,21 @@ static void P_CreateBlockMap ()
 		return;
 
 	// Find map extents for the blockmap
-	minx = maxx = vertexes[0].fixX();
-	miny = maxy = vertexes[0].fixY();
+	dminx = dmaxx = vertexes[0].fX();
+	dminy = dmaxy = vertexes[0].fY();
 
 	for (i = 1; i < numvertexes; ++i)
 	{
-			 if (vertexes[i].fixX() < minx) minx = vertexes[i].fixX();
-		else if (vertexes[i].fixX() > maxx) maxx = vertexes[i].fixX();
-			 if (vertexes[i].fixY() < miny) miny = vertexes[i].fixY();
-		else if (vertexes[i].fixY() > maxy) maxy = vertexes[i].fixY();
+			 if (vertexes[i].fX() < dminx) dminx = vertexes[i].fX();
+		else if (vertexes[i].fX() > dmaxx) dmaxx = vertexes[i].fX();
+			 if (vertexes[i].fY() < dminy) dminy = vertexes[i].fY();
+		else if (vertexes[i].fY() > dmaxy) dmaxy = vertexes[i].fY();
 	}
 
-	maxx >>= FRACBITS;
-	minx >>= FRACBITS;
-	maxy >>= FRACBITS;
-	miny >>= FRACBITS;
+	minx = int(dminx);
+	miny = int(dminy);
+	maxx = int(dmaxx);
+	maxy = int(dmaxy);
 
 	bmapwidth =	 ((maxx - minx) >> BLOCKBITS) + 1;
 	bmapheight = ((maxy - miny) >> BLOCKBITS) + 1;
@@ -2820,10 +2815,10 @@ static void P_CreateBlockMap ()
 
 	for (line = 0; line < numlines; ++line)
 	{
-		int x1 = lines[line].v1->fixX() >> FRACBITS;
-		int y1 = lines[line].v1->fixY() >> FRACBITS;
-		int x2 = lines[line].v2->fixX() >> FRACBITS;
-		int y2 = lines[line].v2->fixY() >> FRACBITS;
+		int x1 = int(lines[line].v1->fX());
+		int y1 = int(lines[line].v1->fY());
+		int x2 = int(lines[line].v2->fX());
+		int y2 = int(lines[line].v2->fY());
 		int dx = x2 - x1;
 		int dy = y2 - y1;
 		int bx = (x1 - minx) >> BLOCKBITS;
@@ -3225,8 +3220,8 @@ static void P_GroupLines (bool buildmap)
 			Triangle[1] = sector->lines[0]->v2;
 			if (sector->linecount > 1)
 			{
-				fixed_t dx = Triangle[1]->fixX() - Triangle[0]->fixX();
-				fixed_t dy = Triangle[1]->fixY() - Triangle[0]->fixY();
+				double dx = Triangle[1]->fX() - Triangle[0]->fX();
+				double dy = Triangle[1]->fY() - Triangle[0]->fY();
 				// Find another point in the sector that does not lie
 				// on the same line as the first two points.
 				for (j = 0; j < 2; ++j)
@@ -3234,11 +3229,10 @@ static void P_GroupLines (bool buildmap)
 					vertex_t *v;
 
 					v = (j == 1) ? sector->lines[1]->v1 : sector->lines[1]->v2;
-					if (DMulScale32 (v->fixY() - Triangle[0]->fixY(), dx,
-									Triangle[0]->fixX() - v->fixX(), dy) != 0)
+					if ( (v->fY() - Triangle[0]->fY()) * dx + (Triangle[0]->fX() - v->fX() * dy) != 0)
 					{
-						sector->centerspot.X = FIXED2DBL(Triangle[0]->fixX() / 3 + Triangle[1]->fixX() / 3 + v->fixX() / 3);
-						sector->centerspot.Y = FIXED2DBL(Triangle[0]->fixY() / 3 + Triangle[1]->fixY() / 3 + v->fixY() / 3);
+						sector->centerspot.X = (Triangle[0]->fX() / 3 + Triangle[1]->fX() / 3 + v->fX() / 3);
+						sector->centerspot.Y = (Triangle[0]->fY() / 3 + Triangle[1]->fY() / 3 + v->fY() / 3);
 						break;
 					}
 				}
@@ -4193,9 +4187,9 @@ CCMD (lineloc)
 	{
 		Printf ("No such line\n");
 	}
-	Printf ("(%d,%d) -> (%d,%d)\n", lines[linenum].v1->fixX() >> FRACBITS,
-		lines[linenum].v1->fixY() >> FRACBITS,
-		lines[linenum].v2->fixX() >> FRACBITS,
-		lines[linenum].v2->fixY() >> FRACBITS);
+	Printf ("(%f,%f) -> (%f,%f)\n", lines[linenum].v1->fX(),
+		lines[linenum].v1->fY(),
+		lines[linenum].v2->fX(),
+		lines[linenum].v2->fY());
 }
 #endif
diff --git a/src/p_sight.cpp b/src/p_sight.cpp
index 2e6531d89..b69daa0cf 100644
--- a/src/p_sight.cpp
+++ b/src/p_sight.cpp
@@ -642,10 +642,11 @@ bool SightCheck::P_SightPathTraverse ()
 	xt2 = x2 / MAPBLOCKUNITS;
 	yt2 = y2 / MAPBLOCKUNITS;
 
-	mapx = int(xt1);
-	mapy = int(yt1);
-	int mapex = int(xt2);
-	int mapey = int(yt2);
+	mapx = xs_FloorToInt(xt1);
+	mapy = xs_FloorToInt(yt1);
+	int mapex = xs_FloorToInt(xt2);
+	int mapey = xs_FloorToInt(yt2);
+
 
 	if (mapex > mapx)
 	{
@@ -731,7 +732,7 @@ bool SightCheck::P_SightPathTraverse ()
 		if (res == -1 || (mapxstep | mapystep) == 0)
 			break;
 
-		switch (((int(yintercept) == mapy) << 1) | (int(xintercept) == mapx))
+		switch (((xs_FloorToInt(yintercept) == mapy) << 1) | (xs_FloorToInt(xintercept) == mapx))
 		{
 		case 0:		// neither xintercept nor yintercept match!
 sightcounts[5]++;
@@ -872,7 +873,7 @@ sightcounts[0]++;
 		double lookheight = t1->Center();
 		t1->GetPortalTransition(lookheight, &sec);
 
-		double bottomslope = t2->Z() - (t1->Z() + lookheight);
+		double bottomslope = t2->Z() - lookheight;
 		double topslope = bottomslope + t2->Height;
 		SightTask task = { 0, topslope, bottomslope, -1, sec->PortalGroup };
 
diff --git a/src/p_spec.cpp b/src/p_spec.cpp
index 4e42d7f1b..9c681b6dc 100644
--- a/src/p_spec.cpp
+++ b/src/p_spec.cpp
@@ -860,8 +860,8 @@ static void SetupFloorPortal (AStackPoint *point)
 	if (skyv != NULL && skyv->bAlways)
 	{
 		skyv->Mate = point;
-		if (Sector->GetAlpha(sector_t::floor) == OPAQUE)
-			Sector->SetAlpha(sector_t::floor, Scale (point->args[0], OPAQUE, 255));
+		if (Sector->GetAlphaF(sector_t::floor) == 1.)
+			Sector->SetAlpha(sector_t::floor, clamp(point->args[0], 0, 255) / 255.);
 	}
 }
 
@@ -874,8 +874,8 @@ static void SetupCeilingPortal (AStackPoint *point)
 	if (skyv != NULL && skyv->bAlways)
 	{
 		skyv->Mate = point;
-		if (Sector->GetAlpha(sector_t::ceiling) == OPAQUE)
-			Sector->SetAlpha(sector_t::ceiling, Scale(point->args[0], OPAQUE, 255));
+		if (Sector->GetAlphaF(sector_t::ceiling) == 1.)
+			Sector->SetAlpha(sector_t::ceiling, clamp(point->args[0], 0, 255) / 255.);
 	}
 }
 
@@ -1148,7 +1148,7 @@ void P_InitSectorSpecial(sector_t *sector, int special, bool nothinkers)
 		break;
 			
 	case dSector_DoorCloseIn30:
-		new DDoor(sector, DDoor::doorWaitClose, FRACUNIT * 2, 0, 0, 30 * TICRATE);
+		new DDoor(sector, DDoor::doorWaitClose, 2, 0, 0, 30 * TICRATE);
 		break;
 			
 	case dDamage_End:
@@ -1164,7 +1164,7 @@ void P_InitSectorSpecial(sector_t *sector, int special, bool nothinkers)
 		break;
 
 	case dSector_DoorRaiseIn5Mins:
-		new DDoor (sector, DDoor::doorWaitRaise, 2*FRACUNIT, TICRATE*30/7, 0, 5*60*TICRATE);
+		new DDoor (sector, DDoor::doorWaitRaise, 2, TICRATE*30/7, 0, 5*60*TICRATE);
 		break;
 
 	case dFriction_Low:
diff --git a/src/p_writemap.cpp b/src/p_writemap.cpp
index 3b0ba4f13..ba1320566 100644
--- a/src/p_writemap.cpp
+++ b/src/p_writemap.cpp
@@ -177,79 +177,17 @@ static int WriteVERTEXES (FILE *file)
 
 static int WriteSEGS (FILE *file)
 {
-#if 0
-	mapseg_t ms;
-
-	ms.offset = 0;		// unused by ZDoom, so just leave it 0
-	for (int i = 0; i < numsegs; ++i)
-	{
-		if (segs[i].linedef!=NULL)
-		{
-			ms.v1 = LittleShort(short(segs[i].v1 - vertexes));
-			ms.v2 = LittleShort(short(segs[i].v2 - vertexes));
-			ms.linedef = LittleShort(short(segs[i].linedef - lines));
-			ms.side = segs[i].sidedef == segs[i].linedef->sidedef[0] ? 0 : LittleShort((short)1);
-			ms.angle = LittleShort(short(R_PointToAngle2 (segs[i].v1->fixX(), segs[i].v1->fixY(), segs[i].v2->fixX(), segs[i].v2->fixY())>>16));
-			fwrite (&ms, sizeof(ms), 1, file);
-		}
-	}
-	return numsegs * sizeof(ms);
-#else
 	return 0;
-#endif
 }
 
 static int WriteSSECTORS (FILE *file)
 {
-#if 0
-	mapsubsector_t mss;
-
-	for (int i = 0; i < numsubsectors; ++i)
-	{
-		mss.firstseg = LittleShort((WORD)subsectors[i].firstline);
-		mss.numsegs = LittleShort((WORD)subsectors[i].numlines);
-		fwrite (&mss, sizeof(mss), 1, file);
-	}
-	return numsubsectors * sizeof(mss);
-#else
 	return 0;
-#endif
 }
 
 static int WriteNODES (FILE *file)
 {
-#if 0
-	mapnode_t mn;
-
-	for (int i = 0; i < numnodes; ++i)
-	{
-		mn.x = LittleShort(short(nodes[i].x >> FRACBITS));
-		mn.y = LittleShort(short(nodes[i].y >> FRACBITS));
-		mn.dx = LittleShort(short(nodes[i].dx >> FRACBITS));
-		mn.dy = LittleShort(short(nodes[i].dy >> FRACBITS));
-		for (int j = 0; j < 2; ++j)
-		{
-			for (int k = 0; k < 4; ++k)
-			{
-				mn.bbox[j][k] = LittleShort(short(nodes[i].bbox[j][k] >> FRACBITS));
-			}
-			WORD child;
-			if ((size_t)nodes[i].children[j] & 1)
-			{
-				child = mapnode_t::NF_SUBSECTOR | WORD((subsector_t *)((BYTE *)nodes[i].children[j] - 1) - subsectors);
-			}
-			else
-			{
-				child = WORD((node_t *)nodes[i].children[j] - nodes);
-			}
-			mn.children[j] = LittleShort(child);
-		}
-		fwrite (&mn, sizeof(mn), 1, file);
-	}
-	return numnodes * sizeof(mn);
-#else
 	return 0;
-#endif
 }
 
 static int WriteSECTORS (FILE *file)
@@ -258,8 +196,8 @@ static int WriteSECTORS (FILE *file)
 
 	for (int i = 0; i < numsectors; ++i)
 	{
-		ms.floorheight = LittleShort(short(sectors[i].GetPlaneTexZ(sector_t::floor) >> FRACBITS));
-		ms.ceilingheight = LittleShort(short(sectors[i].GetPlaneTexZ(sector_t::ceiling) >> FRACBITS));
+		ms.floorheight = LittleShort(short(sectors[i].GetPlaneTexZF(sector_t::floor)));
+		ms.ceilingheight = LittleShort(short(sectors[i].GetPlaneTexZF(sector_t::ceiling)));
 		uppercopy (ms.floorpic, GetTextureName (sectors[i].GetTexture(sector_t::floor)));
 		uppercopy (ms.ceilingpic, GetTextureName (sectors[i].GetTexture(sector_t::ceiling)));
 		ms.lightlevel = LittleShort((short)sectors[i].lightlevel);
diff --git a/src/posix/sdl/i_main.cpp b/src/posix/sdl/i_main.cpp
index 7c08dacdb..54d2c2705 100644
--- a/src/posix/sdl/i_main.cpp
+++ b/src/posix/sdl/i_main.cpp
@@ -180,10 +180,10 @@ static int DoomSpecificInfo (char *buffer, char *end)
 		}
 		else
 		{
-			p += snprintf (buffer+p, size-p, "\n\nviewx = %d", (int)viewx);
-			p += snprintf (buffer+p, size-p, "\nviewy = %d", (int)viewy);
-			p += snprintf (buffer+p, size-p, "\nviewz = %d", (int)viewz);
-			p += snprintf (buffer+p, size-p, "\nviewangle = %x", (unsigned int)viewangle);
+			p += snprintf (buffer+p, size-p, "\n\nviewx = %f", ViewPos.X);
+			p += snprintf (buffer+p, size-p, "\nviewy = %f", ViewPos.Y);
+			p += snprintf (buffer+p, size-p, "\nviewz = %f", ViewPos.Z);
+			p += snprintf (buffer+p, size-p, "\nviewangle = %f", ViewAngle.Degrees);
 		}
 	}
 	buffer[p++] = '\n';
diff --git a/src/posix/sdl/i_timer.cpp b/src/posix/sdl/i_timer.cpp
index fa08659a1..cad3000ba 100644
--- a/src/posix/sdl/i_timer.cpp
+++ b/src/posix/sdl/i_timer.cpp
@@ -184,7 +184,7 @@ double I_GetTimeFrac (uint32 *ms)
 	if (ms) *ms = TicStart + (1000 / TICRATE);
 	if (TicStart == 0)
 	{
-		return FRACUNIT;
+		return 1;
 	}
 	else
 	{
diff --git a/src/r_3dfloors.cpp b/src/r_3dfloors.cpp
index a6aa7d8b5..590d65515 100644
--- a/src/r_3dfloors.cpp
+++ b/src/r_3dfloors.cpp
@@ -52,12 +52,12 @@ void R_3D_AddHeight(secplane_t *add, sector_t *sec)
 {
 	HeightLevel *near;
 	HeightLevel *curr;
-	fixed_t height;
 
-	height = add->ZatPoint(viewx, viewy);
-	if(height >= FLOAT2FIXED(sec->CenterCeiling())) return;
-	if(height <= FLOAT2FIXED(sec->CenterFloor())) return;
+	double fheight = add->ZatPoint(ViewPos);
+	if(fheight >= sec->CenterCeiling()) return;
+	if(fheight <= sec->CenterFloor()) return;
 
+	fixed_t height = FLOAT2FIXED(fheight);
 	fakeActive = 1;
 
 	if(height_max >= 0) {
diff --git a/src/r_3dfloors.h b/src/r_3dfloors.h
index 1a16e36a5..e95d35045 100644
--- a/src/r_3dfloors.h
+++ b/src/r_3dfloors.h
@@ -49,7 +49,6 @@ enum
 
 extern int fake3D;
 extern F3DFloor *fakeFloor;
-extern fixed_t fakeHeight;
 extern fixed_t fakeAlpha;
 extern int fakeActive;
 extern fixed_t sclipBottom;
diff --git a/src/r_bsp.cpp b/src/r_bsp.cpp
index 4f6c2509f..014f8be06 100644
--- a/src/r_bsp.cpp
+++ b/src/r_bsp.cpp
@@ -38,6 +38,7 @@
 #include "p_lnspec.h"
 #include "p_setup.h"
 
+#include "r_local.h"
 #include "r_main.h"
 #include "r_plane.h"
 #include "r_draw.h"
@@ -394,8 +395,8 @@ sector_t *R_FakeFlat(sector_t *sec, sector_t *tempsec,
 			}
 		}
 
-		fixed_t refceilz = s->ceilingplane.ZatPoint (viewx, viewy);
-		fixed_t orgceilz = sec->ceilingplane.ZatPoint (viewx, viewy);
+		fixed_t refceilz = s->ceilingplane.ZatPointFixed (viewx, viewy);
+		fixed_t orgceilz = sec->ceilingplane.ZatPointFixed(viewx, viewy);
 
 #if 1
 		// [RH] Allow viewing underwater areas through doors/windows that
@@ -404,8 +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.ZatPoint (curline->v1->fixX(), curline->v1->fixY()) &&
-				rw_frontcz2 <= s->floorplane.ZatPoint (curline->v2->fixX(), curline->v2->fixY()))
+			if (rw_frontcz1 <= s->floorplane.ZatPointFixed (curline->v1) &&
+				rw_frontcz2 <= s->floorplane.ZatPointFixed(curline->v2))
 			{
 				// Check that the window is actually visible
 				for (int z = WallC.sx1; z < WallC.sx2; ++z)
@@ -555,7 +556,7 @@ void R_AddLine (seg_t *line)
 
 	// reject lines that aren't seen from the portal (if any)
 	// [ZZ] 10.01.2016: lines inside a skybox shouldn't be clipped, although this imposes some limitations on portals in skyboxes.
-	if (!CurrentPortalInSkybox && CurrentPortal && P_ClipLineToPortal(line->linedef, CurrentPortal->dst, DVector2(FIXED2DBL(viewx), FIXED2DBL(viewy))))
+	if (!CurrentPortalInSkybox && CurrentPortal && P_ClipLineToPortal(line->linedef, CurrentPortal->dst, ViewPos))
 		return;
 
 	vertex_t *v1, *v2;
@@ -580,10 +581,10 @@ void R_AddLine (seg_t *line)
 	{
 		backsector = line->backsector;
 	}
-	rw_frontcz1 = frontsector->ceilingplane.ZatPoint (line->v1->fixX(), line->v1->fixY());
-	rw_frontfz1 = frontsector->floorplane.ZatPoint (line->v1->fixX(), line->v1->fixY());
-	rw_frontcz2 = frontsector->ceilingplane.ZatPoint (line->v2->fixX(), line->v2->fixY());
-	rw_frontfz2 = frontsector->floorplane.ZatPoint (line->v2->fixX(), line->v2->fixY());
+	rw_frontcz1 = frontsector->ceilingplane.ZatPointFixed(line->v1);
+	rw_frontfz1 = frontsector->floorplane.ZatPointFixed(line->v1);
+	rw_frontcz2 = frontsector->ceilingplane.ZatPointFixed(line->v2);
+	rw_frontfz2 = frontsector->floorplane.ZatPointFixed(line->v2);
 
 	rw_mustmarkfloor = rw_mustmarkceiling = false;
 	rw_havehigh = rw_havelow = false;
@@ -602,10 +603,10 @@ void R_AddLine (seg_t *line)
 		}
 		doorclosed = 0;		// killough 4/16/98
 
-		rw_backcz1 = backsector->ceilingplane.ZatPoint (line->v1->fixX(), line->v1->fixY());
-		rw_backfz1 = backsector->floorplane.ZatPoint (line->v1->fixX(), line->v1->fixY());
-		rw_backcz2 = backsector->ceilingplane.ZatPoint (line->v2->fixX(), line->v2->fixY());
-		rw_backfz2 = backsector->floorplane.ZatPoint (line->v2->fixX(), line->v2->fixY());
+		rw_backcz1 = backsector->ceilingplane.ZatPointFixed (line->v1);
+		rw_backfz1 = backsector->floorplane.ZatPointFixed(line->v1);
+		rw_backcz2 = backsector->ceilingplane.ZatPointFixed(line->v2);
+		rw_backfz2 = backsector->floorplane.ZatPointFixed(line->v2);
 
 		// Cannot make these walls solid, because it can result in
 		// sprite clipping problems for sprites near the wall
@@ -1183,9 +1184,9 @@ void R_Subsector (subsector_t *sub)
 				fakeFloor->validcount = validcount;
 				R_3D_NewClip();
 			}
-			fakeHeight = FLOAT2FIXED(fakeFloor->top.plane->ZatPoint(frontsector->centerspot));
-			if (fakeHeight < viewz &&
-				fakeHeight > FLOAT2FIXED(frontsector->floorplane.ZatPoint(frontsector->centerspot)))
+			double fakeHeight = fakeFloor->top.plane->ZatPoint(frontsector->centerspot);
+			if (fakeHeight < ViewPos.Z &&
+				fakeHeight > frontsector->floorplane.ZatPoint(frontsector->centerspot))
 			{
 				fake3D = FAKE3D_FAKEFLOOR;
 				tempsec = *fakeFloor->model;
@@ -1245,9 +1246,9 @@ void R_Subsector (subsector_t *sub)
 				fakeFloor->validcount = validcount;
 				R_3D_NewClip();
 			}
-			fakeHeight = FLOAT2FIXED(fakeFloor->bottom.plane->ZatPoint(frontsector->centerspot));
-			if (fakeHeight > viewz &&
-				fakeHeight < FLOAT2FIXED(frontsector->ceilingplane.ZatPoint(frontsector->centerspot)))
+			double fakeHeight = fakeFloor->bottom.plane->ZatPoint(frontsector->centerspot);
+			if (fakeHeight > ViewPos.Z &&
+				fakeHeight < frontsector->ceilingplane.ZatPoint(frontsector->centerspot))
 			{
 				fake3D = FAKE3D_FAKECEILING;
 				tempsec = *fakeFloor->model;
diff --git a/src/r_defs.h b/src/r_defs.h
index 750f96cd0..240a2b907 100644
--- a/src/r_defs.h
+++ b/src/r_defs.h
@@ -313,15 +313,6 @@ private:
 	fixed_t a, b, c, d, ic;
 public:
 
-	void set(fixed_t aa, fixed_t bb, fixed_t cc, fixed_t dd)
-	{
-		a = aa;
-		b = bb;
-		c = cc;
-		d = dd;
-		ic = FixedDiv(FRACUNIT, c);
-	}
-
 	void set(double aa, double bb, double cc, double dd)
 	{
 		a = FLOAT2FIXED(aa);
@@ -383,6 +374,12 @@ public:
 		return TMulScale16(a,x, b,y, c,z) + d;
 	}
 
+	int PointOnSide(const DVector3 &pos) const
+	{
+		double v = a * pos.X + b * pos.Y + c * pos.Z + d;
+		return v < -EQUAL_EPSILON ? -1 : v > EQUAL_EPSILON ? 1 : 0;
+	}
+
 	// 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
 	{
@@ -390,11 +387,25 @@ public:
 	}
 
 	// Returns the value of z at (x,y)
-	fixed_t ZatPoint (fixed_t x, fixed_t y) const
+	fixed_t ZatPoint(fixed_t x, fixed_t y) const = delete;	// it is not allowed to call this.
+
+	fixed_t ZatPointFixed(fixed_t x, fixed_t y) const
 	{
 		return FixedMul (ic, -d - DMulScale16 (a, x, b, y));
 	}
 
+	// This is for the software renderer
+	fixed_t ZatPointFixed(const DVector2 &pos) const
+	{
+		return xs_CRoundToInt((d + a*pos.X + b*pos.Y) * ic / (-65536.0));
+	}
+
+	fixed_t ZatPointFixed(const vertex_t *v) const
+	{
+		return FixedMul(ic, -d - DMulScale16(a, v->fixX(), b, v->fixY()));
+	}
+
+
 	// Returns the value of z at (x,y) as a double
 	double ZatPoint (double x, double y) const
 	{
@@ -406,6 +417,7 @@ public:
 		return (d + a*pos.X + b*pos.Y) * ic / (-65536.0 * 65536.0);
 	}
 
+
 	double ZatPoint(const vertex_t *v) const
 	{
 		return FIXED2DBL(FixedMul(ic, -d - DMulScale16(a, v->fixX(), b, v->fixY())));
@@ -456,12 +468,6 @@ public:
 		return fD() - hdiff * fC();
 	}
 
-	// Returns how much this plane's height would change if d were set to oldd
-	fixed_t HeightDiff (fixed_t oldd) const
-	{
-		return FixedMul (oldd - d, ic);
-	}
-
 	// Returns how much this plane's height would change if d were set to oldd
 	double HeightDiff(double oldd) const
 	{
@@ -474,16 +480,6 @@ public:
 		return (oldd - newd) * fiC();
 	}
 
-	fixed_t PointToDist (fixed_t x, fixed_t y, fixed_t z) const
-	{
-		return -TMulScale16 (a, x, y, b, z, c);
-	}
-
-	fixed_t PointToDist (const vertex_t *v, fixed_t z) const
-	{
-		return -TMulScale16 (a, v->fixX(), b, v->fixY(), z, c);
-	}
-
 	double PointToDist(const DVector2 &xy, double z) const
 	{
 		return -(a * xy.X + b * xy.Y + c * z) / 65536.;
@@ -729,21 +725,11 @@ struct sector_t
 
 	splane planes[2];
 
-	void SetXOffset(int pos, fixed_t o)
-	{
-		planes[pos].xform.xoffs = o;
-	}
-
 	void SetXOffset(int pos, double o)
 	{
 		planes[pos].xform.xoffs = FLOAT2FIXED(o);
 	}
 
-	void AddXOffset(int pos, fixed_t o)
-	{
-		planes[pos].xform.xoffs += o;
-	}
-
 	void AddXOffset(int pos, double o)
 	{
 		planes[pos].xform.xoffs += FLOAT2FIXED(o);
@@ -759,21 +745,11 @@ struct sector_t
 		return FIXED2DBL(planes[pos].xform.xoffs);
 	}
 
-	void SetYOffset(int pos, fixed_t o)
-	{
-		planes[pos].xform.yoffs = o;
-	}
-
 	void SetYOffset(int pos, double o)
 	{
 		planes[pos].xform.yoffs = FLOAT2FIXED(o);
 	}
 
-	void AddYOffset(int pos, fixed_t o)
-	{
-		planes[pos].xform.yoffs += o;
-	}
-
 	void AddYOffset(int pos, double o)
 	{
 		planes[pos].xform.yoffs += FLOAT2FIXED(o);
@@ -803,11 +779,6 @@ struct sector_t
 		}
 	}
 
-	void SetXScale(int pos, fixed_t o)
-	{
-		planes[pos].xform.xscale = o;
-	}
-
 	void SetXScale(int pos, double o)
 	{
 		planes[pos].xform.xscale = FLOAT2FIXED(o);
@@ -823,11 +794,6 @@ struct sector_t
 		return FIXED2DBL(planes[pos].xform.xscale);
 	}
 
-	void SetYScale(int pos, fixed_t o)
-	{
-		planes[pos].xform.yscale = o;
-	}
-
 	void SetYScale(int pos, double o)
 	{
 		planes[pos].xform.yscale = FLOAT2FIXED(o);
@@ -843,11 +809,6 @@ struct sector_t
 		return FIXED2DBL(planes[pos].xform.yscale);
 	}
 
-	void SetAngle(int pos, angle_t o)
-	{
-		planes[pos].xform.angle = o;
-	}
-
 	void SetAngle(int pos, DAngle o)
 	{
 		planes[pos].xform.angle = o.BAMs();
@@ -883,11 +844,6 @@ struct sector_t
 		planes[pos].xform.base_angle = o.BAMs();
 	}
 
-	void SetAlpha(int pos, fixed_t o)
-	{
-		planes[pos].alpha = o;
-	}
-
 	void SetAlpha(int pos, double o)
 	{
 		planes[pos].alpha = FLOAT2FIXED(o);
@@ -946,34 +902,13 @@ struct sector_t
 		return FIXED2DBL(planes[pos].TexZ);
 	}
 
-	void SetVerticesDirty()	{
-		for (unsigned i = 0; i < e->vertices.Size(); i++) e->vertices[i]->dirty = true;
-	}
-
-	void SetAllVerticesDirty()
-	{
-		SetVerticesDirty();
-		for (unsigned i = 0; i < e->FakeFloor.Sectors.Size(); i++) e->FakeFloor.Sectors[i]->SetVerticesDirty();
-		for (unsigned i = 0; i < e->XFloor.attached.Size(); i++) e->XFloor.attached[i]->SetVerticesDirty();
-	}
-
-	void SetPlaneTexZ(int pos, fixed_t val)
-	{
-		planes[pos].TexZ = val;
-	}
-
+	void SetPlaneTexZ(int pos, double val)
 	void SetPlaneTexZ(int pos, double val, bool dirtify = false)	// This mainly gets used by init code. The only place where it must set the vertex to dirty is the interpolation code.
 	{
 		planes[pos].TexZ = FLOAT2FIXED(val);
 		if (dirtify) SetAllVerticesDirty();
 	}
 
-	void ChangePlaneTexZ(int pos, fixed_t val)
-	{
-		planes[pos].TexZ += val;
-		SetAllVerticesDirty();
-	}
-
 	void ChangePlaneTexZ(int pos, double val)
 	{
 		planes[pos].TexZ += FLOAT2FIXED(val);
@@ -1071,6 +1006,18 @@ struct sector_t
 		return Displacements.getOffset(PortalGroup, SkyBoxes[sector_t::ceiling]->Sector->PortalGroup);
 	}
 
+	void SetVerticesDirty()	
+	{
+		for (unsigned i = 0; i < e->vertices.Size(); i++) e->vertices[i]->dirty = true;
+	}
+
+	void SetAllVerticesDirty()
+	{
+		SetVerticesDirty();
+		for (unsigned i = 0; i < e->FakeFloor.Sectors.Size(); i++) e->FakeFloor.Sectors[i]->SetVerticesDirty();
+		for (unsigned i = 0; i < e->XFloor.attached.Size(); i++) e->XFloor.attached[i]->SetVerticesDirty();
+	}
+
 	int GetTerrain(int pos) const;
 
 	void TransferSpecial(sector_t *model);
diff --git a/src/r_main.cpp b/src/r_main.cpp
index 80e2eb859..3577b3c3b 100644
--- a/src/r_main.cpp
+++ b/src/r_main.cpp
@@ -68,6 +68,7 @@
 #define TEST_ANGLE 2468347904 
 #endif
 
+
 // TYPES -------------------------------------------------------------------
 
 // EXTERNAL FUNCTION PROTOTYPES --------------------------------------------
@@ -727,9 +728,8 @@ void R_EnterPortal (PortalDrawseg* pds, int depth)
 			viewx = FLOAT2FIXED((x1 + r * dx)*2 - x);
 			viewy = FLOAT2FIXED((y1 + r * dy)*2 - y);
 		}
-		viewangle = 2*R_PointToAngle2 (pds->src->v1->fixX(), pds->src->v1->fixY(),
-									   pds->src->v2->fixX(), pds->src->v2->fixY()) - startang;
-
+		viewangle = pds->src->Delta().Angle().BAMs() - startang;
+		ViewAngle = AngleToFloat(viewangle);
 	}
 	else
 	{
@@ -743,6 +743,7 @@ void R_EnterPortal (PortalDrawseg* pds, int depth)
 		viewz = FLOAT2FIXED(view.Z);
 		viewangle = va.BAMs();
 	}
+	ViewAngle = AngleToFloat(viewangle);
 
 	viewsin = finesine[viewangle>>ANGLETOFINESHIFT];
 	viewcos = finecosine[viewangle>>ANGLETOFINESHIFT];
@@ -821,6 +822,7 @@ void R_EnterPortal (PortalDrawseg* pds, int depth)
 	viewx = startx;
 	viewy = starty;
 	viewz = startz;
+	ViewAngle = AngleToFloat(viewangle);
 }
 
 //==========================================================================
diff --git a/src/r_plane.cpp b/src/r_plane.cpp
index 2bf47154a..61b969a4e 100644
--- a/src/r_plane.cpp
+++ b/src/r_plane.cpp
@@ -1082,6 +1082,7 @@ void R_DrawHeightPlanes(fixed_t height)
 				viewy = pl->viewy;
 				viewz = pl->viewz;
 				viewangle = pl->viewangle;
+				ViewAngle = AngleToFloat(viewangle);
 				MirrorFlags = pl->MirrorFlags;
 				R_DrawSinglePlane (pl, pl->sky & 0x7FFFFFFF, pl->Additive, true);
 			}
@@ -1092,6 +1093,7 @@ void R_DrawHeightPlanes(fixed_t height)
 	viewy = oViewY;
 	viewz = oViewZ;
 	viewangle = oViewAngle;
+	ViewAngle = AngleToFloat(viewangle);
 }
 
 
@@ -1240,7 +1242,7 @@ void R_DrawSkyBoxes ()
 			viewx = FLOAT2FIXED(viewpos.X);
 			viewy = FLOAT2FIXED(viewpos.Y);
 			viewz = FLOAT2FIXED(viewpos.Z);
-			viewangle = savedangle + (sky->PrevAngles.Yaw + (sky->Angles.Yaw * r_TicFracF) - sky->PrevAngles.Yaw).BAMs();
+			viewangle = savedangle + (sky->PrevAngles.Yaw + deltaangle(sky->PrevAngles.Yaw, sky->Angles.Yaw) * r_TicFracF).BAMs();
 
 			R_CopyStackedViewParameters();
 		}
@@ -1248,11 +1250,12 @@ void R_DrawSkyBoxes ()
 		{
 			extralight = pl->extralight;
 			R_SetVisibility (pl->visibility);
-			viewx = pl->viewx - FLOAT2FIXED(sky->Mate->X() + sky->X());
-			viewy = pl->viewy - FLOAT2FIXED(sky->Mate->Y() + sky->Y());
+			viewx = pl->viewx + FLOAT2FIXED(-sky->Mate->X() + sky->X());
+			viewy = pl->viewy + FLOAT2FIXED(-sky->Mate->Y() + sky->Y());
 			viewz = pl->viewz;
 			viewangle = pl->viewangle;
 		}
+		ViewAngle = AngleToFloat(viewangle);
 
 		sky->bInSkybox = true;
 		if (mate != NULL) mate->bInSkybox = true;
@@ -1367,6 +1370,7 @@ void R_DrawSkyBoxes ()
 	R_SetVisibility (savedvisibility);
 	extralight = savedextralight;
 	viewangle = savedangle;
+	ViewAngle = AngleToFloat(viewangle);
 	R_SetViewAngle ();
 
 	CurrentPortalInSkybox = false;
diff --git a/src/r_segs.cpp b/src/r_segs.cpp
index 6b24103d9..0c645f14a 100644
--- a/src/r_segs.cpp
+++ b/src/r_segs.cpp
@@ -274,7 +274,7 @@ void R_RenderMaskedSegRange (drawseg_t *ds, int x1, int x2)
 	{
 		if (!(fake3D & FAKE3D_CLIPTOP))
 		{
-			sclipTop = sec->ceilingplane.ZatPoint(viewx, viewy);
+			sclipTop = sec->ceilingplane.ZatPointFixed(viewx, viewy);
 		}
 		for (i = frontsector->e->XFloor.lightlist.Size() - 1; i >= 0; i--)
 		{
@@ -1385,10 +1385,10 @@ 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.ZatPoint(ds->curline->v1->fixX(), ds->curline->v1->fixY());
-		fixed_t frontfz1 = ds->curline->frontsector->floorplane.ZatPoint(ds->curline->v1->fixX(), ds->curline->v1->fixY());
-		fixed_t frontcz2 = ds->curline->frontsector->ceilingplane.ZatPoint(ds->curline->v2->fixX(), ds->curline->v2->fixY());
-		fixed_t frontfz2 = ds->curline->frontsector->floorplane.ZatPoint(ds->curline->v2->fixX(), ds->curline->v2->fixY());
+		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);
 		if (fake3D & FAKE3D_CLIPTOP)
@@ -2783,7 +2783,7 @@ int WallMost (short *mostbuf, const secplane_t &plane, const FWallCoords *wallc)
 			x -= MulScale30 (frac, x - curline->v1->fixX());
 			y -= MulScale30 (frac, y - curline->v1->fixY());
 		}
-		z1 = viewz - plane.ZatPoint (x, y);
+		z1 = viewz - plane.ZatPointFixed(x, y);
 
 		if (wallc->sx2 > wallc->sx1 + 1)
 		{
@@ -2795,7 +2795,7 @@ int WallMost (short *mostbuf, const secplane_t &plane, const FWallCoords *wallc)
 				x += MulScale30 (frac, curline->v2->fixX() - x);
 				y += MulScale30 (frac, curline->v2->fixY() - y);
 			}
-			z2 = viewz - plane.ZatPoint (x, y);
+			z2 = viewz - plane.ZatPointFixed(x, y);
 		}
 		else
 		{
@@ -2812,7 +2812,7 @@ int WallMost (short *mostbuf, const secplane_t &plane, const FWallCoords *wallc)
 			x += MulScale30 (frac, curline->v2->fixX() - x);
 			y += MulScale30 (frac, curline->v2->fixY() - y);
 		}
-		z1 = viewz - plane.ZatPoint (x, y);
+		z1 = viewz - plane.ZatPointFixed(x, y);
 
 		if (wallc->sx2 > wallc->sx1 + 1)
 		{
@@ -2824,7 +2824,7 @@ int WallMost (short *mostbuf, const secplane_t &plane, const FWallCoords *wallc)
 				x -= MulScale30 (frac, x - curline->v1->fixX());
 				y -= MulScale30 (frac, y - curline->v1->fixY());
 			}
-			z2 = viewz - plane.ZatPoint (x, y);
+			z2 = viewz - plane.ZatPointFixed(x, y);
 		}
 		else
 		{
diff --git a/src/r_state.h b/src/r_state.h
index 60cbecebf..5a5501465 100644
--- a/src/r_state.h
+++ b/src/r_state.h
@@ -78,9 +78,6 @@ extern int 				numgamesubsectors;
 //
 // POV data.
 //
-extern fixed_t			viewz;
-extern angle_t			viewangle;
-
 extern AActor*			camera;		// [RH] camera instead of viewplayer
 extern sector_t*		viewsector;	// [RH] keep track of sector viewing from
 
diff --git a/src/r_things.cpp b/src/r_things.cpp
index 0e4e717f6..7eb1095da 100644
--- a/src/r_things.cpp
+++ b/src/r_things.cpp
@@ -802,7 +802,7 @@ 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_PointToAngle (fx, fy);
+			angle_t ang = R_PointToAngle2 (viewx, viewy, fx, fy);
 			angle_t rot;
 			if (sprframe->Texture[0] == sprframe->Texture[1])
 			{
@@ -841,7 +841,7 @@ 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_PointToAngle (fx, fy);
+			angle_t ang = R_PointToAngle2 (viewx, viewy, fx, fy);
 			angle_t rot;
 			if (sprframe->Texture[0] == sprframe->Texture[1])
 			{
@@ -937,19 +937,19 @@ void R_ProjectSprite (AActor *thing, int fakeside, F3DFloor *fakefloor, F3DFloor
 	{
 		if (fakeside == FAKED_AboveCeiling)
 		{
-			if (gzt < heightsec->ceilingplane.ZatPoint (fx, fy))
+			if (gzt < heightsec->ceilingplane.ZatPointFixed(fx, fy))
 				return;
 		}
 		else if (fakeside == FAKED_BelowFloor)
 		{
-			if (gzb >= heightsec->floorplane.ZatPoint (fx, fy))
+			if (gzb >= heightsec->floorplane.ZatPointFixed(fx, fy))
 				return;
 		}
 		else
 		{
-			if (gzt < heightsec->floorplane.ZatPoint (fx, fy))
+			if (gzt < heightsec->floorplane.ZatPointFixed(fx, fy))
 				return;
-			if (!(heightsec->MoreFlags & SECF_FAKEFLOORONLY) && gzb >= heightsec->ceilingplane.ZatPoint (fx, fy))
+			if (!(heightsec->MoreFlags & SECF_FAKEFLOORONLY) && gzb >= heightsec->ceilingplane.ZatPointFixed(fx, fy))
 				return;
 		}
 	}
@@ -1931,7 +1931,7 @@ void R_DrawSprite (vissprite_t *spr)
 	{
 		if (!(fake3D & FAKE3D_CLIPTOP))
 		{
-			sclipTop = spr->sector->ceilingplane.ZatPoint(viewx, viewy);
+			sclipTop = spr->sector->ceilingplane.ZatPointFixed(viewx, viewy);
 		}
 		sector_t *sec = NULL;
 		for (i = spr->sector->e->XFloor.lightlist.Size() - 1; i >= 0; i--)
@@ -2031,7 +2031,7 @@ void R_DrawSprite (vissprite_t *spr)
 	{ // only things in specially marked sectors
 		if (spr->FakeFlatStat != FAKED_AboveCeiling)
 		{
-			fixed_t hz = spr->heightsec->floorplane.ZatPoint (spr->gx, spr->gy);
+			fixed_t hz = spr->heightsec->floorplane.ZatPointFixed(spr->gx, spr->gy);
 			fixed_t h = (centeryfrac - FixedMul (hz-viewz, scale)) >> FRACBITS;
 
 			if (spr->FakeFlatStat == FAKED_BelowFloor)
@@ -2053,7 +2053,7 @@ void R_DrawSprite (vissprite_t *spr)
 		}
 		if (spr->FakeFlatStat != FAKED_BelowFloor && !(spr->heightsec->MoreFlags & SECF_FAKEFLOORONLY))
 		{
-			fixed_t hz = spr->heightsec->ceilingplane.ZatPoint (spr->gx, spr->gy);
+			fixed_t hz = spr->heightsec->ceilingplane.ZatPointFixed(spr->gx, spr->gy);
 			fixed_t h = (centeryfrac - FixedMul (hz-viewz, scale)) >> FRACBITS;
 
 			if (spr->FakeFlatStat == FAKED_AboveCeiling)
@@ -2423,12 +2423,12 @@ void R_ProjectParticle (particle_t *particle, const sector_t *sector, int shade,
 	BYTE*				map;
 
 	// [ZZ] Particle not visible through the portal plane
-	if (CurrentPortal && !!P_PointOnLineSide(particle->x, particle->y, CurrentPortal->dst))
+	if (CurrentPortal && !!P_PointOnLineSide(particle->Pos, CurrentPortal->dst))
 		return;
 
 	// transform the origin point
-	tr_x = particle->x - viewx;
-	tr_y = particle->y - viewy;
+	tr_x = FLOAT2FIXED(particle->Pos.X - ViewPos.X);
+	tr_y = FLOAT2FIXED(particle->Pos.Y - ViewPos.Y);
 
 	tz = DMulScale20 (tr_x, viewtancos, tr_y, viewtansin);
 
@@ -2460,8 +2460,8 @@ void R_ProjectParticle (particle_t *particle, const sector_t *sector, int shade,
 	if (x1 >= x2)
 		return;
 
-	yscale = MulScale16 (yaspectmul, xscale);
-	ty = particle->z - viewz;
+	yscale = MulScale16(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;
@@ -2522,9 +2522,9 @@ void R_ProjectParticle (particle_t *particle, const sector_t *sector, int shade,
 		map = sector->ColorMap->Maps;
 	}
 
-	if (botpic != skyflatnum && particle->z < botplane->ZatPoint (particle->x, particle->y))
+	if (botpic != skyflatnum && particle->Pos.Z < botplane->ZatPoint (particle->Pos))
 		return;
-	if (toppic != skyflatnum && particle->z >= topplane->ZatPoint (particle->x, particle->y))
+	if (toppic != skyflatnum && particle->Pos.Z >= topplane->ZatPoint (particle->Pos))
 		return;
 
 	// store information in a vissprite
@@ -2536,9 +2536,9 @@ void R_ProjectParticle (particle_t *particle, const sector_t *sector, int shade,
 	vis->yscale = xscale;
 	vis->depth = tz;
 	vis->idepth = (DWORD)DivScale32 (1, tz) >> 1;
-	vis->gx = particle->x;
-	vis->gy = particle->y;
-	vis->gz = particle->z; // kg3D
+	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->x1 = x1;
diff --git a/src/r_utility.cpp b/src/r_utility.cpp
index 169463752..f84224aad 100644
--- a/src/r_utility.cpp
+++ b/src/r_utility.cpp
@@ -70,12 +70,15 @@ EXTERN_CVAR (Bool, cl_capfps)
 
 struct InterpolationViewer
 {
+	struct instance
+	{
+		DVector3 Pos;
+		DRotator Angles;
+	};
+
 	AActor *ViewActor;
 	int otic;
-	fixed_t oviewx, oviewy, oviewz;
-	fixed_t nviewx, nviewy, nviewz;
-	int oviewpitch, nviewpitch;
-	angle_t oviewangle, nviewangle;
+	instance Old, New;
 };
 
 // PRIVATE DATA DECLARATIONS -----------------------------------------------
@@ -102,11 +105,9 @@ DCanvas			*RenderTarget;		// [RH] canvas to render to
 int 			viewwindowx;
 int 			viewwindowy;
 
-fixed_t 		viewx;
-fixed_t 		viewy;
-fixed_t 		viewz;
-int				viewpitch;
-angle_t 		viewangle;
+DVector3		ViewPos;
+DAngle			ViewAngle;
+DAngle			ViewPitch;
 
 extern "C" 
 {
@@ -148,6 +149,10 @@ int				FieldOfView = 2048;		// Fineangles in the SCREENWIDTH wide window
 
 FCanvasTextureInfo *FCanvasTextureInfo::List;
 
+fixed_t viewx, viewy, viewz;
+angle_t viewangle;
+int viewpitch;
+
 
 // CODE --------------------------------------------------------------------
 static void R_Shutdown ();
@@ -574,27 +579,20 @@ EXTERN_CVAR (Bool, cl_noprediction)
 
 void R_InterpolateView (player_t *player, double Frac, InterpolationViewer *iview)
 {
-	fixed_t frac = FLOAT2FIXED(Frac);
 	if (NoInterpolateView)
 	{
 		InterpolationPath.Clear();
 		NoInterpolateView = false;
-		iview->oviewx = iview->nviewx;
-		iview->oviewy = iview->nviewy;
-		iview->oviewz = iview->nviewz;
-		iview->oviewpitch = iview->nviewpitch;
-		iview->oviewangle = iview->nviewangle;
+		iview->Old = iview->New;
 	}
-	int oldgroup = R_PointInSubsector(iview->oviewx, iview->oviewy)->sector->PortalGroup;
-	int newgroup = R_PointInSubsector(iview->nviewx, iview->nviewy)->sector->PortalGroup;
+	int oldgroup = R_PointInSubsector(iview->Old.Pos)->sector->PortalGroup;
+	int newgroup = R_PointInSubsector(iview->New.Pos)->sector->PortalGroup;
 
-	fixed_t oviewangle = iview->oviewangle;
-	fixed_t nviewangle = iview->nviewangle;
-	if ((iview->oviewx != iview->nviewx || iview->oviewy != iview->nviewy) && InterpolationPath.Size() > 0)
+	DAngle oviewangle = iview->Old.Angles.Yaw;
+	DAngle nviewangle = iview->New.Angles.Yaw;
+	if ((iview->Old.Pos.X != iview->New.Pos.X || iview->Old.Pos.Y != iview->New.Pos.Y) && InterpolationPath.Size() > 0)
 	{
-		viewx = iview->nviewx;
-		viewy = iview->nviewy;
-		viewz = iview->nviewz;
+		DVector3 view = iview->New.Pos;
 
 		// Interpolating through line portals is a messy affair.
 		// What needs be done is to store the portal transitions of the camera actor as waypoints
@@ -602,49 +600,47 @@ void R_InterpolateView (player_t *player, double Frac, InterpolationViewer *ivie
 		// Needless to say, this doesn't work for chasecam mode.
 		if (!r_showviewer)
 		{
-			fixed_t pathlen = 0;
-			fixed_t zdiff = 0;
-			fixed_t totalzdiff = 0;
-			angle_t adiff = 0;
-			angle_t totaladiff = 0;
-			fixed_t oviewz = iview->oviewz;
-			fixed_t nviewz = iview->nviewz;
-			DVector3a oldpos = { {FIXED2DBL(iview->oviewx), FIXED2DBL(iview->oviewy), 0.}, 0. };
-			DVector3a newpos = { {FIXED2DBL(iview->nviewx), FIXED2DBL(iview->nviewy), 0. }, 0. };
+			double pathlen = 0;
+			double zdiff = 0;
+			double totalzdiff = 0;
+			DAngle adiff = 0.;
+			DAngle totaladiff = 0.;
+			double oviewz = iview->Old.Pos.Z;
+			double nviewz = iview->New.Pos.Z;
+			DVector3a oldpos = { { iview->Old.Pos.X, iview->Old.Pos.Y, 0 }, 0. };
+			DVector3a newpos = { { iview->New.Pos.X, iview->New.Pos.Y, 0 }, 0. };
 			InterpolationPath.Push(newpos);	// add this to  the array to simplify the loops below
 
 			for (unsigned i = 0; i < InterpolationPath.Size(); i += 2)
 			{
 				DVector3a &start = i == 0 ? oldpos : InterpolationPath[i - 1];
 				DVector3a &end = InterpolationPath[i];
-				pathlen += FLOAT2FIXED((end.pos-start.pos).Length());
-				totalzdiff += FLOAT2FIXED(start.pos.Z);
-				totaladiff += start.angle.BAMs();
+				pathlen += (end.pos-start.pos).Length();
+				totalzdiff += start.pos.Z;
+				totaladiff += start.angle;
 			}
-			fixed_t interpolatedlen = FixedMul(frac, pathlen);
+			double interpolatedlen = Frac * pathlen;
 
 			for (unsigned i = 0; i < InterpolationPath.Size(); i += 2)
 			{
 				DVector3a &start = i == 0 ? oldpos : InterpolationPath[i - 1];
 				DVector3a &end = InterpolationPath[i];
-				fixed_t fraglen = FLOAT2FIXED((end.pos - start.pos).Length());
-				zdiff += FLOAT2FIXED(start.pos.Z);
-				adiff += start.angle.BAMs();
+				double fraglen = (end.pos - start.pos).Length();
+				zdiff += start.pos.Z;
+				adiff += start.angle;
 				if (fraglen <= interpolatedlen)
 				{
 					interpolatedlen -= fraglen;
 				}
 				else
 				{
-					double fragfrac = FIXED2DBL(FixedDiv(interpolatedlen, fraglen));
+					double fragfrac = interpolatedlen / fraglen;
 					oviewz += zdiff;
 					nviewz -= totalzdiff - zdiff;
 					oviewangle += adiff;
 					nviewangle -= totaladiff - adiff;
 					DVector2 viewpos = start.pos + (fragfrac * (end.pos - start.pos));
-					viewx = FLOAT2FIXED(viewpos.X);
-					viewy = FLOAT2FIXED(viewpos.Y);
-					viewz = oviewz + FixedMul(frac, nviewz - oviewz);
+					ViewPos = { viewpos, oviewz + Frac * (nviewz - oviewz) };
 					break;
 				}
 			}
@@ -654,17 +650,15 @@ void R_InterpolateView (player_t *player, double Frac, InterpolationViewer *ivie
 	else
 	{
 		DVector2 disp = Displacements.getOffset(oldgroup, newgroup);
-		viewx = iview->oviewx + FixedMul(frac, iview->nviewx - iview->oviewx - FLOAT2FIXED(disp.X));
-		viewy = iview->oviewy + FixedMul(frac, iview->nviewy - iview->oviewy - FLOAT2FIXED(disp.Y));
-		viewz = iview->oviewz + FixedMul(frac, iview->nviewz - iview->oviewz);
+		ViewPos = iview->Old.Pos + (iview->New.Pos - iview->Old.Pos - disp) * Frac;
 	}
 	if (player != NULL &&
 		!(player->cheats & CF_INTERPVIEW) &&
 		player - players == consoleplayer &&
 		camera == player->mo &&
 		!demoplayback &&
-		iview->nviewx == camera->_f_X() &&
-		iview->nviewy == camera->_f_Y() && 
+		iview->New.Pos.X == camera->X() &&
+		iview->New.Pos.Y == camera->Y() && 
 		!(player->cheats & (CF_TOTALLYFROZEN|CF_FROZEN)) &&
 		player->playerstate == PST_LIVE &&
 		player->mo->reactiontime == 0 &&
@@ -673,53 +667,26 @@ void R_InterpolateView (player_t *player, double Frac, InterpolationViewer *ivie
 		(!netgame || !cl_noprediction) &&
 		!LocalKeyboardTurner)
 	{
-		viewangle = nviewangle + (LocalViewAngle & 0xFFFF0000);
-
-		fixed_t delta = player->centering ? 0 : -(signed)(LocalViewPitch & 0xFFFF0000);
-
-		viewpitch = iview->nviewpitch;
-		if (delta > 0)
-		{
-			// Avoid overflowing viewpitch (can happen when a netgame is stalled)
-			if (viewpitch > INT_MAX - delta)
-			{
-				viewpitch = player->MaxPitch.BAMs();
-			}
-			else
-			{
-				viewpitch = MIN<int>(viewpitch + delta, player->MaxPitch.BAMs());
-			}
-		}
-		else if (delta < 0)
-		{
-			// Avoid overflowing viewpitch (can happen when a netgame is stalled)
-			if (viewpitch < INT_MIN - delta)
-			{
-				viewpitch = player->MinPitch.BAMs();
-			}
-			else
-			{
-				viewpitch = MAX<int>(viewpitch + delta, player->MinPitch.BAMs());
-			}
-		}
+		ViewAngle = (nviewangle + AngleToFloat(LocalViewAngle & 0xFFFF0000)).Normalized180();
+		DAngle delta = player->centering ? DAngle(0.) : AngleToFloat(int(LocalViewPitch & 0xFFFF0000));
+		ViewPitch = clamp<DAngle>((iview->New.Angles.Pitch - delta).Normalized180(), player->MinPitch, player->MaxPitch);
 	}
 	else
 	{
-		viewpitch = iview->oviewpitch + FixedMul (frac, iview->nviewpitch - iview->oviewpitch);
-		viewangle = oviewangle + FixedMul (frac, nviewangle - oviewangle);
+		ViewPitch = (iview->Old.Angles.Pitch + deltaangle(iview->Old.Angles.Pitch, iview->New.Angles.Pitch) * Frac).Normalized180();
+		ViewAngle = (oviewangle + deltaangle(oviewangle, nviewangle) * Frac).Normalized180();
 	}
 	
 	// Due to interpolation this is not necessarily the same as the sector the camera is in.
-	viewsector = R_PointInSubsector(viewx, viewy)->sector;
+	viewsector = R_PointInSubsector(ViewPos)->sector;
 	bool moved = false;
 	while (!viewsector->PortalBlocksMovement(sector_t::ceiling))
 	{
 		AActor *point = viewsector->SkyBoxes[sector_t::ceiling];
-		if (viewz > FLOAT2FIXED(point->specialf1))
+		if (ViewPos.Z > point->specialf1)
 		{
-			viewx += FLOAT2FIXED(point->Scale.X);
-			viewy += FLOAT2FIXED(point->Scale.Y);
-			viewsector = R_PointInSubsector(viewx, viewy)->sector;
+			ViewPos += point->Scale;
+			viewsector = R_PointInSubsector(ViewPos)->sector;
 			moved = true;
 		}
 		else break;
@@ -729,11 +696,10 @@ void R_InterpolateView (player_t *player, double Frac, InterpolationViewer *ivie
 		while (!viewsector->PortalBlocksMovement(sector_t::floor))
 		{
 			AActor *point = viewsector->SkyBoxes[sector_t::floor];
-			if (viewz < FLOAT2FIXED(point->specialf1))
+			if (ViewPos.Z < point->specialf1)
 			{
-				viewx += FLOAT2FIXED(point->Scale.X);
-				viewy += FLOAT2FIXED(point->Scale.Y);
-				viewsector = R_PointInSubsector(viewx, viewy)->sector;
+				ViewPos += point->Scale;
+				viewsector = R_PointInSubsector(ViewPos)->sector;
 				moved = true;
 			}
 			else break;
@@ -761,10 +727,8 @@ void R_ResetViewInterpolation ()
 
 void R_SetViewAngle ()
 {
-	angle_t ang = viewangle >> ANGLETOFINESHIFT;
-
-	viewsin = finesine[ang];
-	viewcos = finecosine[ang];
+	viewsin = FLOAT2FIXED(ViewAngle.Sin());
+	viewcos = FLOAT2FIXED(ViewAngle.Cos());
 
 	viewtansin = FixedMul (FocalTangent, viewsin);
 	viewtancos = FixedMul (FocalTangent, viewcos);
@@ -787,7 +751,8 @@ static InterpolationViewer *FindPastViewer (AActor *actor)
 	}
 
 	// Not found, so make a new one
-	InterpolationViewer iview = { NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+	InterpolationViewer iview;
+	memset(&iview, 0, sizeof(iview));
 	iview.ViewActor = actor;
 	iview.otic = -1;
 	InterpolationPath.Clear();
@@ -851,11 +816,7 @@ void R_RebuildViewInterpolation(player_t *player)
 
 	InterpolationViewer *iview = FindPastViewer(player->camera);
 
-	iview->oviewx = iview->nviewx;
-	iview->oviewy = iview->nviewy;
-	iview->oviewz = iview->nviewz;
-	iview->oviewpitch = iview->nviewpitch;
-	iview->oviewangle = iview->nviewangle;
+	iview->Old = iview->New;
 	InterpolationPath.Clear();
 }
 
@@ -955,52 +916,39 @@ void R_SetupFrame (AActor *actor)
 	if (iview->otic != -1 && nowtic > iview->otic)
 	{
 		iview->otic = nowtic;
-		iview->oviewx = iview->nviewx;
-		iview->oviewy = iview->nviewy;
-		iview->oviewz = iview->nviewz;
-		iview->oviewpitch = iview->nviewpitch;
-		iview->oviewangle = iview->nviewangle;
+		iview->Old = iview->New;
 	}
 
 	if (player != NULL && gamestate != GS_TITLELEVEL &&
 		((player->cheats & CF_CHASECAM) || (r_deathcamera && camera->health <= 0)))
 	{
-		sector_t *oldsector = R_PointInSubsector(iview->oviewx, iview->oviewy)->sector;
+		sector_t *oldsector = R_PointInSubsector(iview->Old.Pos)->sector;
 		// [RH] Use chasecam view
 		DVector3 campos;
-		P_AimCamera (camera, campos, viewsector, unlinked);
-		iview->nviewx = FLOAT2FIXED(campos.X);
-		iview->nviewy = FLOAT2FIXED(campos.Y);
-		iview->nviewz = FLOAT2FIXED(campos.Z);
+		P_AimCamera (camera, campos, viewsector, unlinked);	// fixme: This needs to translate the angle, too.
+		iview->New.Pos = campos;
 		r_showviewer = true;
 		// Interpolating this is a very complicated thing because nothing keeps track of the aim camera's movement, so whenever we detect a portal transition
 		// it's probably best to just reset the interpolation for this move.
 		// Note that this can still cause problems with unusually linked portals
-		if (viewsector->PortalGroup != oldsector->PortalGroup || (unlinked && P_AproxDistance(iview->oviewx - iview->nviewx, iview->oviewy - iview->nviewy) > 256 * FRACUNIT))
+		if (viewsector->PortalGroup != oldsector->PortalGroup || (unlinked && ((iview->New.Pos.XY() - iview->Old.Pos.XY()).LengthSquared()) > 256*256))
 		{
 			iview->otic = nowtic;
-			iview->oviewx = iview->nviewx;
-			iview->oviewy = iview->nviewy;
-			iview->oviewz = iview->nviewz;
-			iview->oviewpitch = iview->nviewpitch;
-			iview->oviewangle = iview->nviewangle;
+			iview->Old = iview->New;
 		}
 	}
 	else
 	{
-		iview->nviewx = camera->_f_X();
-		iview->nviewy = camera->_f_Y();
-		iview->nviewz = FLOAT2FIXED(camera->player ? camera->player->viewz : camera->Z() + camera->GetCameraHeight());
+		iview->New.Pos = { camera->Pos().XY(), camera->player ? camera->player->viewz : camera->Z() + camera->GetCameraHeight() };
 		viewsector = camera->Sector;
 		r_showviewer = false;
 	}
-	iview->nviewpitch = camera->Angles.Pitch.BAMs();
+	iview->New.Angles = camera->Angles;
 	if (camera->player != 0)
 	{
 		player = camera->player;
 	}
 
-	iview->nviewangle = camera->Angles.Yaw.BAMs();
 	if (iview->otic == -1 || r_NoInterpolate)
 	{
 		R_ResetViewInterpolation ();
@@ -1014,13 +962,6 @@ void R_SetupFrame (AActor *actor)
 	}
 	R_InterpolateView (player, r_TicFracF, iview);
 
-#ifdef TEST_X
-	viewx = TEST_X;
-	viewy = TEST_Y;
-	viewz = TEST_Z;
-	viewangle = TEST_ANGLE;
-#endif
-
 	R_SetViewAngle ();
 
 	interpolator.DoInterpolations (r_TicFracF);
@@ -1028,19 +969,19 @@ void R_SetupFrame (AActor *actor)
 	// Keep the view within the sector's floor and ceiling
 	if (viewsector->PortalBlocksMovement(sector_t::ceiling))
 	{
-		fixed_t theZ = viewsector->ceilingplane.ZatPoint(viewx, viewy) - 4 * FRACUNIT;
-		if (viewz > theZ)
+		double theZ = viewsector->ceilingplane.ZatPoint(ViewPos) - 4;
+		if (ViewPos.Z > theZ)
 		{
-			viewz = theZ;
+			ViewPos.Z = theZ;
 		}
 	}
 
 	if (viewsector->PortalBlocksMovement(sector_t::floor))
 	{
-		fixed_t theZ = viewsector->floorplane.ZatPoint(viewx, viewy) + 4 * FRACUNIT;
-		if (viewz < theZ)
+		double theZ = viewsector->floorplane.ZatPoint(ViewPos) + 4;
+		if (ViewPos.Z < theZ)
 		{
-			viewz = theZ;
+			ViewPos.Z = theZ;
 		}
 	}
 
@@ -1058,32 +999,30 @@ void R_SetupFrame (AActor *actor)
 			{
 				an = camera->Angles.Yaw;
 				double power = QuakePower(quakefactor, jiggers.RelIntensity.X, jiggers.RelOffset.X, jiggers.Falloff, jiggers.WFalloff);
-				viewx += FLOAT2FIXED(an.Cos() * power);
-				viewy += FLOAT2FIXED(an.Sin() * power);
+				ViewPos += an.ToVector(power);
 			}
 			if (jiggers.RelIntensity.Y != 0 || jiggers.RelOffset.Y != 0)
 			{
 				an = camera->Angles.Yaw + 90;
 				double power = QuakePower(quakefactor, jiggers.RelIntensity.Y, jiggers.RelOffset.Y, jiggers.Falloff, jiggers.WFalloff);
-				viewx += FLOAT2FIXED(an.Cos() * power);
-				viewy += FLOAT2FIXED(an.Sin() * power);
+				ViewPos += an.ToVector(power);
 			}
 			// FIXME: Relative Z is not relative
 			if (jiggers.RelIntensity.Z != 0 || jiggers.RelOffset.Z != 0)
 			{
-				viewz += FLOAT2FIXED(QuakePower(quakefactor, jiggers.RelIntensity.Z, jiggers.RelOffset.Z, jiggers.Falloff, jiggers.WFalloff));
+				ViewPos.Z += QuakePower(quakefactor, jiggers.RelIntensity.Z, jiggers.RelOffset.Z, jiggers.Falloff, jiggers.WFalloff);
 			}
 			if (jiggers.Intensity.X != 0 || jiggers.Offset.X != 0)
 			{
-				viewx += FLOAT2FIXED(QuakePower(quakefactor, jiggers.Intensity.X, jiggers.Offset.X, jiggers.Falloff, jiggers.WFalloff));
+				ViewPos.X += QuakePower(quakefactor, jiggers.Intensity.X, jiggers.Offset.X, jiggers.Falloff, jiggers.WFalloff);
 			}
 			if (jiggers.Intensity.Y != 0 || jiggers.Offset.Y != 0)
 			{
-				viewy += FLOAT2FIXED(QuakePower(quakefactor, jiggers.Intensity.Y, jiggers.Offset.Y, jiggers.Falloff, jiggers.WFalloff));
+				ViewPos.Y += QuakePower(quakefactor, jiggers.Intensity.Y, jiggers.Offset.Y, jiggers.Falloff, jiggers.WFalloff);
 			}
 			if (jiggers.Intensity.Z != 0 || jiggers.Offset.Z != 0)
 			{
-				viewz += FLOAT2FIXED(QuakePower(quakefactor, jiggers.Intensity.Z, jiggers.Offset.Z, jiggers.Falloff, jiggers.WFalloff));
+				ViewPos.Z += QuakePower(quakefactor, jiggers.Intensity.Z, jiggers.Offset.Z, jiggers.Falloff, jiggers.WFalloff);
 			}
 		}
 	}
@@ -1102,7 +1041,7 @@ void R_SetupFrame (AActor *actor)
 			secplane_t *plane;
 			int viewside;
 			plane = (i < lightlist.Size()-1) ? &lightlist[i+1].plane : &viewsector->floorplane;
-			viewside = plane->PointOnSide(viewx, viewy, viewz);
+			viewside = plane->PointOnSide(ViewPos);
 			// Reverse the direction of the test if the plane was downward facing.
 			// We want to know if the view is above it, whatever its orientation may be.
 			if (plane->fC() < 0)
@@ -1124,9 +1063,9 @@ void R_SetupFrame (AActor *actor)
 		const sector_t *s = viewsector->GetHeightSec();
 		if (s != NULL)
 		{
-			newblend = s->floorplane.PointOnSide(viewx, viewy, viewz) < 0
+			newblend = s->floorplane.PointOnSide(ViewPos) < 0
 				? s->bottommap
-				: s->ceilingplane.PointOnSide(viewx, viewy, viewz) < 0
+				: s->ceilingplane.PointOnSide(ViewPos) < 0
 				? s->topmap
 				: s->midmap;
 			if (APART(newblend) == 0 && newblend >= numfakecmaps)
@@ -1156,6 +1095,12 @@ 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);
 
diff --git a/src/r_utility.h b/src/r_utility.h
index f37fc01ee..9e2ccf3cf 100644
--- a/src/r_utility.h
+++ b/src/r_utility.h
@@ -2,6 +2,7 @@
 #define __R_UTIL_H
 
 #include "r_state.h"
+#include "vectors.h"
 //
 // Stuff from r_main.h that's needed outside the rendering code.
 
@@ -11,10 +12,13 @@
 
 extern DCanvas			*RenderTarget;
 
-extern fixed_t			viewx;
-extern fixed_t			viewy;
-extern fixed_t			viewz;
-extern int				viewpitch;
+extern DVector3			ViewPos;
+extern DAngle			ViewAngle;
+extern DAngle			ViewPitch;
+
+extern fixed_t viewx, viewy, viewz;
+extern angle_t viewangle;
+extern int viewpitch;
 
 extern "C" int			centerx, centerxwide;
 extern "C" int			centery;
@@ -65,7 +69,6 @@ inline int R_PointOnSide(const DVector2 &pos, const node_t *node)
 }
 
 angle_t R_PointToAngle2 (fixed_t x1, fixed_t y1, fixed_t x2, fixed_t y2);
-inline angle_t R_PointToAngle (fixed_t x, fixed_t y) { return R_PointToAngle2 (viewx, viewy, x, y); }
 inline angle_t R_PointToAnglePrecise (fixed_t viewx, fixed_t viewy, fixed_t x, fixed_t y)
 {
 	return xs_RoundToUInt(g_atan2(double(y-viewy), double(x-viewx)) * (ANGLE_180/M_PI));
diff --git a/src/wi_stuff.cpp b/src/wi_stuff.cpp
index d568051ae..108edff3b 100644
--- a/src/wi_stuff.cpp
+++ b/src/wi_stuff.cpp
@@ -722,7 +722,7 @@ static int WI_DrawCharPatch (FFont *font, int charcode, int x, int y, EColorRang
 	int width;
 	screen->DrawTexture(font->GetChar(charcode, &width), x, y,
 		nomove ? DTA_CleanNoMove : DTA_Clean, true,
-		DTA_ShadowAlpha, (gameinfo.gametype & GAME_DoomChex) ? 0 : FRACUNIT/2,
+		DTA_ShadowAlpha, (gameinfo.gametype & GAME_DoomChex) ? 0 : OPAQUE/2,
 		DTA_Translation, font->GetColorTranslation(translation),
 		TAG_DONE);
 	return x - width;
diff --git a/src/win32/i_main.cpp b/src/win32/i_main.cpp
index 4e6868a7b..241e9dae2 100644
--- a/src/win32/i_main.cpp
+++ b/src/win32/i_main.cpp
@@ -1080,10 +1080,10 @@ void DoomSpecificInfo (char *buffer, size_t bufflen)
 		}
 		else
 		{
-			buffer += mysnprintf (buffer, buffend - buffer, "\r\n\r\nviewx = %d", viewx);
-			buffer += mysnprintf (buffer, buffend - buffer, "\r\nviewy = %d", viewy);
-			buffer += mysnprintf (buffer, buffend - buffer, "\r\nviewz = %d", viewz);
-			buffer += mysnprintf (buffer, buffend - buffer, "\r\nviewangle = %x", viewangle);
+			buffer += mysnprintf (buffer, buffend - buffer, "\r\n\r\nviewx = %f", ViewPos.X);
+			buffer += mysnprintf (buffer, buffend - buffer, "\r\nviewy = %f", ViewPos.Y);
+			buffer += mysnprintf (buffer, buffend - buffer, "\r\nviewz = %f", ViewPos.Z);
+			buffer += mysnprintf (buffer, buffend - buffer, "\r\nviewangle = %f", ViewAngle);
 		}
 	}
 	*buffer++ = '\r';