Partial sky portal support

src/r_poly_plane.cpp

@@ -32,7 +32,7 @@
 
 EXTERN_CVAR(Int, r_3dfloors)
 
-void RenderPolyPlane::RenderPlanes(const TriMatrix &worldToClip, subsector_t *sub, uint32_t subsectorDepth, uint32_t stencilValue, double skyCeilingHeight, double skyFloorHeight)
+void RenderPolyPlane::RenderPlanes(const TriMatrix &worldToClip, subsector_t *sub, uint32_t subsectorDepth, uint32_t stencilValue, double skyCeilingHeight, double skyFloorHeight, std::vector<std::unique_ptr<PolyDrawSectorPortal>> &sectorPortals)
 {
 	RenderPolyPlane plane;
 
@@ -84,8 +84,8 @@ void RenderPolyPlane::RenderPlanes(const TriMatrix &worldToClip, subsector_t *su
 		}
 	}
 
-	plane.Render(worldToClip, sub, subsectorDepth, stencilValue, true, skyCeilingHeight);
-	plane.Render(worldToClip, sub, subsectorDepth, stencilValue, false, skyFloorHeight);
+	plane.Render(worldToClip, sub, subsectorDepth, stencilValue, true, skyCeilingHeight, sectorPortals);
+	plane.Render(worldToClip, sub, subsectorDepth, stencilValue, false, skyFloorHeight, sectorPortals);
 }
 
 void RenderPolyPlane::Render3DFloor(const TriMatrix &worldToClip, subsector_t *sub, uint32_t subsectorDepth, uint32_t stencilValue, bool ceiling, F3DFloor *fakeFloor)
@@ -146,8 +146,14 @@ void RenderPolyPlane::Render3DFloor(const TriMatrix &worldToClip, subsector_t *s
 	PolyTriangleDrawer::draw(args, TriDrawVariant::Stencil, TriBlendMode::Copy);
 }
 
-void RenderPolyPlane::Render(const TriMatrix &worldToClip, subsector_t *sub, uint32_t subsectorDepth, uint32_t stencilValue, bool ceiling, double skyHeight)
+void RenderPolyPlane::Render(const TriMatrix &worldToClip, subsector_t *sub, uint32_t subsectorDepth, uint32_t stencilValue, bool ceiling, double skyHeight, std::vector<std::unique_ptr<PolyDrawSectorPortal>> &sectorPortals)
 {
+	FSectorPortal *portal = sub->sector->ValidatePortal(ceiling ? sector_t::ceiling : sector_t::floor);
+	if (portal && sectorPortals.empty())
+	{
+		sectorPortals.push_back(std::make_unique<PolyDrawSectorPortal>(portal, ceiling));
+	}
+
 	sector_t *fakesector = sub->sector->heightsec;
 	if (fakesector && (fakesector == sub->sector || (fakesector->MoreFlags & SECF_IGNOREHEIGHTSEC) == SECF_IGNOREHEIGHTSEC))
 		fakesector = nullptr;
@@ -237,13 +243,29 @@ void RenderPolyPlane::Render(const TriMatrix &worldToClip, subsector_t *sub, uin
 
 	if (!isSky)
 	{
-		args.SetTexture(tex);
-		PolyTriangleDrawer::draw(args, TriDrawVariant::DrawNormal, TriBlendMode::Copy);
-		PolyTriangleDrawer::draw(args, TriDrawVariant::Stencil, TriBlendMode::Copy);
+		if (!portal)
+		{
+			args.SetTexture(tex);
+			PolyTriangleDrawer::draw(args, TriDrawVariant::DrawNormal, TriBlendMode::Copy);
+			PolyTriangleDrawer::draw(args, TriDrawVariant::Stencil, TriBlendMode::Copy);
+		}
+		else
+		{
+			args.stencilwritevalue = 252;
+			PolyTriangleDrawer::draw(args, TriDrawVariant::Stencil, TriBlendMode::Copy);
+		}
 	}
 	else
 	{
-		args.stencilwritevalue = 255;
+		if (portal)
+		{
+			args.stencilwritevalue = 252;
+		}
+		else
+		{
+			args.stencilwritevalue = 255;
+		}
+
 		PolyTriangleDrawer::draw(args, TriDrawVariant::Stencil, TriBlendMode::Copy);
 
 		for (uint32_t i = 0; i < sub->numlines; i++)

src/r_poly_plane.h

@@ -24,13 +24,15 @@
 
 #include "r_poly_triangle.h"
 
+class PolyDrawSectorPortal;
+
 class RenderPolyPlane
 {
 public:
-	static void RenderPlanes(const TriMatrix &worldToClip, subsector_t *sub, uint32_t subsectorDepth, uint32_t stencilValue, double skyCeilingHeight, double skyFloorHeight);
+	static void RenderPlanes(const TriMatrix &worldToClip, subsector_t *sub, uint32_t subsectorDepth, uint32_t stencilValue, double skyCeilingHeight, double skyFloorHeight, std::vector<std::unique_ptr<PolyDrawSectorPortal>> &sectorPortals);
 
 private:
 	void Render3DFloor(const TriMatrix &worldToClip, subsector_t *sub, uint32_t subsectorDepth, uint32_t stencilValue, bool ceiling, F3DFloor *fakefloor);
-	void Render(const TriMatrix &worldToClip, subsector_t *sub, uint32_t subsectorDepth, uint32_t stencilValue, bool ceiling, double skyHeight);
+	void Render(const TriMatrix &worldToClip, subsector_t *sub, uint32_t subsectorDepth, uint32_t stencilValue, bool ceiling, double skyHeight, std::vector<std::unique_ptr<PolyDrawSectorPortal>> &sectorPortals);
 	TriVertex PlaneVertex(vertex_t *v1, double height);
 };

src/r_poly_portal.cpp

@@ -29,9 +29,18 @@
 #include "gl/data/gl_data.h"
 
 CVAR(Bool, r_debug_cull, 0, 0)
+EXTERN_CVAR(Int, r_portal_recursions)
 
 /////////////////////////////////////////////////////////////////////////////
 
+RenderPolyPortal::RenderPolyPortal()
+{
+}
+
+RenderPolyPortal::~RenderPolyPortal()
+{
+}
+
 void RenderPolyPortal::SetViewpoint(const TriMatrix &worldToClip, uint32_t stencilValue)
 {
 	WorldToClip = worldToClip;
@@ -43,7 +52,9 @@ void RenderPolyPortal::Render()
 	ClearBuffers();
 	Cull.CullScene(WorldToClip);
 	RenderSectors();
-	for (auto &portal : Portals)
+	for (auto &portal : SectorPortals)
+		portal->Render();
+	for (auto &portal : LinePortals)
 		portal->Render();
 }
 
@@ -53,7 +64,8 @@ void RenderPolyPortal::ClearBuffers()
 	SectorSpriteRanges.resize(numsectors);
 	SortedSprites.clear();
 	TranslucentObjects.clear();
-	Portals.clear();
+	SectorPortals.clear();
+	LinePortals.clear();
 	NextSubsectorDepth = 0;
 }
 
@@ -80,10 +92,7 @@ void RenderPolyPortal::RenderSubsector(subsector_t *sub)
 
 	if (sub->sector->CenterFloor() != sub->sector->CenterCeiling())
 	{
-		RenderPolyPlane::RenderPlanes(WorldToClip, sub, subsectorDepth, StencilValue, Cull.MaxCeilingHeight, Cull.MinFloorHeight);
-
-		FSectorPortal *ceilingPortal = frontsector->ValidatePortal(sector_t::ceiling);
-		FSectorPortal *floorPortal = frontsector->ValidatePortal(sector_t::floor);
+		RenderPolyPlane::RenderPlanes(WorldToClip, sub, subsectorDepth, StencilValue, Cull.MaxCeilingHeight, Cull.MinFloorHeight, SectorPortals);
 	}
 
 	for (uint32_t i = 0; i < sub->numlines; i++)
@@ -181,7 +190,10 @@ void RenderPolyPortal::RenderLine(subsector_t *sub, seg_t *line, sector_t *front
 
 void RenderPolyPortal::RenderTranslucent()
 {
-	for (auto it = Portals.rbegin(); it != Portals.rend(); ++it)
+	for (auto it = SectorPortals.rbegin(); it != SectorPortals.rend(); ++it)
+		(*it)->RenderTranslucent();
+
+	for (auto it = LinePortals.rbegin(); it != LinePortals.rend(); ++it)
 		(*it)->RenderTranslucent();
 
 	for (auto it = TranslucentObjects.rbegin(); it != TranslucentObjects.rend(); ++it)
@@ -208,3 +220,94 @@ void RenderPolyPortal::RenderTranslucent()
 		}
 	}
 }
+
+/////////////////////////////////////////////////////////////////////////////
+
+PolyDrawSectorPortal::PolyDrawSectorPortal(FSectorPortal *portal, bool ceiling) : Portal(portal), Ceiling(ceiling)
+{
+}
+
+void PolyDrawSectorPortal::Render()
+{
+	if (Portal->mType != PORTS_SKYVIEWPOINT)
+		return;
+
+	static int recursion = 0;
+	if (recursion >= 1/*r_portal_recursions*/)
+		return;
+	recursion++;
+
+	int savedextralight = extralight;
+	DVector3 savedpos = ViewPos;
+	DAngle savedangle = ViewAngle;
+	double savedvisibility = R_GetVisibility();
+	AActor *savedcamera = camera;
+	sector_t *savedsector = viewsector;
+
+	// Don't let gun flashes brighten the sky box
+	ASkyViewpoint *sky = barrier_cast<ASkyViewpoint*>(Portal->mSkybox);
+	extralight = 0;
+	R_SetVisibility(sky->args[0] * 0.25f);
+	ViewPos = sky->InterpolatedPosition(r_TicFracF);
+	ViewAngle = savedangle + (sky->PrevAngles.Yaw + deltaangle(sky->PrevAngles.Yaw, sky->Angles.Yaw) * r_TicFracF);
+
+	camera = nullptr;
+	viewsector = Portal->mDestination;
+	R_SetViewAngle();
+
+	// To do: get this information from RenderPolyScene instead of duplicating the code..
+	double radPitch = ViewPitch.Normalized180().Radians();
+	double angx = cos(radPitch);
+	double angy = sin(radPitch) * glset.pixelstretch;
+	double alen = sqrt(angx*angx + angy*angy);
+	float adjustedPitch = (float)asin(angy / alen);
+	float adjustedViewAngle = (float)(ViewAngle - 90).Radians();
+	float ratio = WidescreenRatio;
+	float fovratio = (WidescreenRatio >= 1.3f) ? 1.333333f : ratio;
+	float fovy = (float)(2 * DAngle::ToDegrees(atan(tan(FieldOfView.Radians() / 2) / fovratio)).Degrees);
+	TriMatrix worldToView =
+		TriMatrix::rotate(adjustedPitch, 1.0f, 0.0f, 0.0f) *
+		TriMatrix::rotate(adjustedViewAngle, 0.0f, -1.0f, 0.0f) *
+		TriMatrix::scale(1.0f, glset.pixelstretch, 1.0f) *
+		TriMatrix::swapYZ() *
+		TriMatrix::translate((float)-ViewPos.X, (float)-ViewPos.Y, (float)-ViewPos.Z);
+	TriMatrix worldToClip = TriMatrix::perspective(fovy, ratio, 5.0f, 65535.0f) * worldToView;
+
+	RenderPortal.SetViewpoint(worldToClip, 252);
+	RenderPortal.Render();
+
+	camera = savedcamera;
+	viewsector = savedsector;
+	ViewPos = savedpos;
+	R_SetVisibility(savedvisibility);
+	extralight = savedextralight;
+	ViewAngle = savedangle;
+	R_SetViewAngle();
+
+	recursion--;
+}
+
+void PolyDrawSectorPortal::RenderTranslucent()
+{
+	/*if (Portal->mType != PORTS_SKYVIEWPOINT)
+		return;
+
+	RenderPortal.RenderTranslucent();*/
+}
+
+/////////////////////////////////////////////////////////////////////////////
+
+PolyDrawLinePortal::PolyDrawLinePortal(line_t *src, line_t *dest, bool mirror) : Src(src), Dest(dest)
+{
+	// To do: do what R_EnterPortal and PortalDrawseg does
+}
+
+void PolyDrawLinePortal::Render()
+{
+	RenderPortal.Render();
+}
+
+void PolyDrawLinePortal::RenderTranslucent()
+{
+	RenderPortal.RenderTranslucent();
+}

src/r_poly_portal.h

@@ -74,10 +74,15 @@ public:
 	int Count = 0;
 };
 
+class PolyDrawSectorPortal;
+class PolyDrawLinePortal;
+
 // Renders everything from a specific viewpoint
 class RenderPolyPortal
 {
 public:
+	RenderPolyPortal();
+	~RenderPolyPortal();
 	void SetViewpoint(const TriMatrix &worldToClip, uint32_t stencilValue);
 	void Render();
 	void RenderTranslucent();
@@ -101,5 +106,34 @@ private:
 	std::vector<PolyTranslucentObject> TranslucentObjects;
 	std::vector<PolyTranslucentObject> SubsectorTranslucentWalls;
 
-	std::vector<std::unique_ptr<RenderPolyPortal>> Portals;
+	std::vector<std::unique_ptr<PolyDrawSectorPortal>> SectorPortals;
+	std::vector<std::unique_ptr<PolyDrawLinePortal>> LinePortals;
+};
+
+class PolyDrawSectorPortal
+{
+public:
+	PolyDrawSectorPortal(FSectorPortal *portal, bool ceiling);
+
+	void Render();
+	void RenderTranslucent();
+
+private:
+	FSectorPortal *Portal;
+	bool Ceiling;
+	RenderPolyPortal RenderPortal;
+};
+
+class PolyDrawLinePortal
+{
+public:
+	PolyDrawLinePortal(line_t *src, line_t *dest, bool mirror);
+
+	void Render();
+	void RenderTranslucent();
+
+private:
+	line_t *Src;
+	line_t *Dest;
+	RenderPolyPortal RenderPortal;
 };

src/r_poly_wall.cpp

@@ -39,6 +39,7 @@ bool RenderPolyWall::RenderLine(const TriMatrix &worldToClip, seg_t *line, secto
 	wall.Colormap = frontsector->ColorMap;
 	wall.Masked = false;
 	wall.SubsectorDepth = subsectorDepth;
+	wall.StencilValue = stencilValue;
 
 	double frontceilz1 = frontsector->ceilingplane.ZatPoint(line->v1);
 	double frontfloorz1 = frontsector->floorplane.ZatPoint(line->v1);
@@ -134,6 +135,7 @@ void RenderPolyWall::Render3DFloorLine(const TriMatrix &worldToClip, seg_t *line
 	wall.Colormap = frontsector->ColorMap;
 	wall.Masked = false;
 	wall.SubsectorDepth = subsectorDepth;
+	wall.StencilValue = stencilValue;
 	wall.SetCoords(line->v1->fPos(), line->v2->fPos(), frontceilz1, frontfloorz1, frontceilz2, frontfloorz2);
 	wall.TopZ = frontceilz1;
 	wall.BottomZ = frontfloorz1;