- sector rendering refactoring for sections - work in progress.

src/actor.h

@@ -53,6 +53,7 @@ struct FBlockNode;
 struct FPortalGroupArray;
 struct visstyle_t;
 class FLightDefaults;
+struct FSection;
 //
 // NOTES: AActor
 //

src/hwrenderer/data/hw_sections.cpp

@@ -34,6 +34,7 @@
 #include "p_setup.h"
 #include "c_dispatch.h"
 #include "memarena.h"
+#include "flatvertices.h"
 
 using DoublePoint = std::pair<DVector2, DVector2>;
 
@@ -611,6 +612,114 @@ public:
 		return false;
 	}
 
+
+	//=============================================================================
+	//
+	//
+	//
+	//=============================================================================
+
+	// Temporary data for creating an indexed buffer
+	struct VertexIndexGenerationInfo
+	{
+		TArray<vertex_t *> vertices;
+		TMap<vertex_t*, uint32_t> vertexmap;
+
+		TArray<uint32_t> indices;
+
+		uint32_t AddVertex(vertex_t *vert)
+		{
+			auto check = vertexmap.CheckKey(vert);
+			if (check != nullptr) return *check;
+			auto index = vertices.Push(vert);
+			vertexmap[vert] = index;
+			return index;
+		}
+
+		uint32_t GetIndex(vertex_t *vert)
+		{
+			auto check = vertexmap.CheckKey(vert);
+			if (check != nullptr) return *check;
+			return ~0u;
+		}
+
+		uint32_t AddIndexForVertex(vertex_t *vert)
+		{
+			return indices.Push(GetIndex(vert));
+		}
+
+		uint32_t AddIndex(uint32_t indx)
+		{
+			return indices.Push(indx);
+		}
+	};
+
+	//=============================================================================
+	//
+	//
+	//
+	//=============================================================================
+
+	void CreateIndexedSubsectorVertices(subsector_t *sub, VertexIndexGenerationInfo &gen)
+	{
+		if (sub->numlines < 3) return;
+
+		uint32_t startindex = gen.indices.Size();
+
+		if ((sub->flags & SSECF_HOLE) && sub->numlines > 3)
+		{
+			// Hole filling "subsectors" are not necessarily convex so they require real triangulation.
+			// These things are extremely rare so performance is secondary here.
+
+			using Point = std::pair<double, double>;
+			std::vector<std::vector<Point>> polygon;
+			std::vector<Point> *curPoly;
+
+			for (unsigned i = 0; i < sub->numlines; i++)
+			{
+				polygon.resize(1);
+				curPoly = &polygon.back();
+				curPoly->push_back({ sub->firstline[i].v1->fX(), sub->firstline[i].v1->fY() });
+			}
+			auto indices = mapbox::earcut(polygon);
+			for (auto vti : indices)
+			{
+				gen.AddIndexForVertex(sub->firstline[vti].v1);
+			}
+		}
+		else
+		{
+			int firstndx = gen.GetIndex(sub->firstline[0].v1);
+			int secondndx = gen.GetIndex(sub->firstline[1].v1);
+			for (unsigned int k = 2; k < sub->numlines; k++)
+			{
+				gen.AddIndex(firstndx);
+				gen.AddIndex(secondndx);
+				auto ndx = gen.GetIndex(sub->firstline[k].v1);
+				gen.AddIndex(ndx);
+				secondndx = ndx;
+			}
+		}
+	}
+
+
+	void CreateVerticesForSection(FSectionContainer &output, FSection &section)
+	{
+		VertexIndexGenerationInfo gen;
+
+		for (auto sub : section.subsectors)
+		{
+			CreateIndexedSubsectorVertices(sub, gen);
+		}
+		section.vertexindex = output.allVertices.Size();
+		section.vertexcount = gen.vertices.Size();
+		section.indexindex = output.allVertexIndices.Size();
+		section.indexcount = gen.indices.Size();
+		output.allVertices.Append(gen.vertices);
+		output.allVertexIndices.Append(gen.indices);
+	}
+
+
 	//=============================================================================
 	//
 	//
@@ -620,10 +729,14 @@ public:
 	void ConstructOutput(FSectionContainer &output)
 	{
 		output.allSections.Resize(groups.Size());
-		output.allIndices.Resize(level.subsectors.Size() + level.sides.Size());
+		output.allIndices.Resize(level.subsectors.Size() + level.sides.Size() + 2*level.sectors.Size());
 		output.sectionForSubsectorPtr = &output.allIndices[0];
 		output.sectionForSidedefPtr = &output.allIndices[level.subsectors.Size()];
+		output.firstSectionForSectorPtr = &output.allIndices[level.subsectors.Size() + level.sides.Size()];
+		output.numberOfSectionForSectorPtr = &output.allIndices[level.subsectors.Size() + level.sides.Size() + level.sectors.Size()];
 		memset(output.sectionForSubsectorPtr, -1, sizeof(int) * level.subsectors.Size());
+		memset(output.firstSectionForSectorPtr, -1, sizeof(int) * level.sectors.Size());
+		memset(output.numberOfSectionForSectorPtr, 0, sizeof(int) * level.sectors.Size());
 
 		unsigned numsegments = 0;
 		unsigned numsides = 0;
@@ -669,10 +782,15 @@ public:
 			dest.validcount = 0;
 			dest.segments.Set(&output.allLines[numsegments], group.segments.Size());
 			dest.sides.Set(&output.allSides[numsides], group.sideMap.CountUsed());
-			dest.subsectors.Set(&output.allSubsectors[numsubsectors]);
+			dest.subsectors.Set(&output.allSubsectors[numsubsectors], group.subsectors.Size());
+			dest.vertexindex = -1;
+			dest.vertexcount = 0;
 			dest.bounds = {1e32, 1e32, -1e32, -1e32};
 			numsegments += group.segments.Size();
 
+			if (output.firstSectionForSectorPtr[dest.sector->Index()] == -1)
+				output.firstSectionForSectorPtr[dest.sector->Index()] = curgroup;
+
 			for (auto &segment : group.segments)
 			{
 				// Use the indices calculated above to store these elements.
@@ -697,6 +815,7 @@ public:
 				output.sectionForSubsectorPtr[ssi] = curgroup;
 			}
 			numsubsectors += group.subsectors.Size();
+			CreateVerticesForSection(output, dest);
 			curgroup++;
 		}
 	}

src/hwrenderer/data/hw_sections.h

@@ -80,11 +80,15 @@ struct FSection
 {
 	// tbd: Do we need a list of subsectors here? Ideally the subsectors should not be used anywhere anymore except for finding out where a location is.
 	TArrayView<FSectionLine> segments;
-	TArrayView<side_t *>	 sides;		// contains all sidedefs, including the internal ones that do not make up the outer shape. (this list is not exclusive. A sidedef can be in multiple sections!)
+	TArrayView<side_t *>	 sides;				// contains all sidedefs, including the internal ones that do not make up the outer shape.
-	TArrayView<subsector_t *>	 subsectors;		// contains all sidedefs, including the internal ones that do not make up the outer shape. (this list is not exclusive. A sidedef can be in multiple sections!)
+	TArrayView<subsector_t *>	 subsectors;	// contains all subsectors making up this section
 	sector_t				*sector;
 	FLightNode				*lighthead;			// Light nodes (blended and additive)
 	BoundingRect			 bounds;
+	int						 vertexindex;	
+	int						 vertexcount;		// index and length of this section's entry in the allVertices array
+	int						 indexindex;
+	int						 indexcount;		// index and length of this section's entry in the allVertices array
 	int						 validcount;
 	short					 mapsection;
 	char					 hacked;			// 1: is part of a render hack
@@ -95,13 +99,16 @@ class FSectionContainer
 public:
 	TArray<FSectionLine> allLines;
 	TArray<FSection> allSections;
-	//TArray<vertex_t*> allVertices;
+	TArray<vertex_t*> allVertices;
+	TArray<uint32_t> allVertexIndices;
 	TArray<side_t *> allSides;
 	TArray<subsector_t *> allSubsectors;
 	TArray<int> allIndices;
 
 	int *sectionForSubsectorPtr;			// stored inside allIndices
 	int *sectionForSidedefPtr;				// also stored inside allIndices;
+	int *firstSectionForSectorPtr;			// ditto.
+	int *numberOfSectionForSectorPtr;		// ditto.
 
 	FSection *SectionForSubsector(subsector_t *sub)
 	{
@@ -111,6 +118,14 @@ public:
 	{
 		return ssindex < 0 ? nullptr : &allSections[sectionForSubsectorPtr[ssindex]];
 	}
+	int SectionNumForSubsector(subsector_t *sub)
+	{
+		return SectionNumForSubsector(sub->Index());
+	}
+	int SectionNumForSubsector(int ssindex)
+	{
+		return ssindex < 0 ? -1 : sectionForSubsectorPtr[ssindex];
+	}
 	FSection *SectionForSidedef(side_t *side)
 	{
 		return SectionForSidedef(side->Index());
@@ -119,11 +134,35 @@ public:
 	{
 		return sindex < 0 ? nullptr : &allSections[sectionForSidedefPtr[sindex]];
 	}
+	int SectionNumForSidedef(side_t *side)
+	{
+		return SectionNumForSidedef(side->Index());
+	}
+	int SectionNumForSidedef(int sindex)
+	{
+		return sindex < 0 ? -1 : sectionForSidedefPtr[sindex];
+	}
+	TArrayView<FSection> SectionsForSector(sector_t *sec)
+	{
+		return SectionsForSector(sec->Index());
+	}
+	TArrayView<FSection> SectionsForSector(int sindex)
+	{
+		return sindex < 0 ? TArrayView<FSection>(0) : TArrayView<FSection>(&allSections[firstSectionForSectorPtr[sindex]], numberOfSectionForSectorPtr[sindex]);
+	}
+	int SectionIndex(const FSection *sect)
+	{
+		return int(sect - allSections.Data());
+	}
 	void Clear()
 	{
 		allLines.Clear();
 		allSections.Clear();
 		allIndices.Clear();
+		allVertexIndices.Clear();
+		allVertices.Clear();
+		allSides.Clear();
+		allSubsectors.Clear();
 	}
 	void Reset()
 	{
@@ -131,6 +170,10 @@ public:
 		allLines.ShrinkToFit();
 		allSections.ShrinkToFit();
 		allIndices.ShrinkToFit();
+		allVertexIndices.ShrinkToFit();
+		allVertices.ShrinkToFit();
+		allSides.ShrinkToFit();
+		allSubsectors.ShrinkToFit();
 	}
 };
 

src/hwrenderer/scene/hw_bsp.cpp

@@ -155,6 +155,7 @@ void HWDrawInfo::WorkerThread()
 		{
 			GLFlat flat;
 			SetupFlat.Clock();
+			flat.section = level.sections.SectionForSubsector(job->sub);
 			front = hw_FakeFlat(job->sub->render_sector, &fakefront, in_area, false);
 			flat.ProcessSector(this, front);
 			SetupFlat.Unclock();
@@ -679,7 +680,8 @@ void HWDrawInfo::DoSubsector(subsector_t * sub)
 					fakesector = hw_FakeFlat(sector, &fake, in_area, false);
 				}
 
-				uint8_t &srf = sectorrenderflags[sub->render_sector->sectornum];
+				auto secnum = level.sections.SectionNumForSubsector(sub);
+				uint8_t &srf = section_renderflags[secnum];
 				if (!(srf & SSRF_PROCESSED))
 				{
 					srf |= SSRF_PROCESSED;
@@ -691,6 +693,7 @@ void HWDrawInfo::DoSubsector(subsector_t * sub)
 					else
 					{
 						GLFlat flat;
+						flat.section = level.sections.SectionForSubsector(sub);
 						SetupFlat.Clock();
 						flat.ProcessSector(this, fakesector);
 						SetupFlat.Unclock();

src/hwrenderer/scene/hw_drawinfo.cpp

@@ -214,11 +214,11 @@ void HWDrawInfo::ClearBuffers()
 	CurrentMapSections.Resize(level.NumMapSections);
 	CurrentMapSections.Zero();
 
-	sectorrenderflags.Resize(level.sectors.Size());
+	section_renderflags.Resize(level.sections.allSections.Size());
 	ss_renderflags.Resize(level.subsectors.Size());
 	no_renderflags.Resize(level.subsectors.Size());
 
-	memset(&sectorrenderflags[0], 0, level.sectors.Size() * sizeof(sectorrenderflags[0]));
+	memset(&section_renderflags[0], 0, level.sections.allSections.Size() * sizeof(section_renderflags[0]));
 	memset(&ss_renderflags[0], 0, level.subsectors.Size() * sizeof(ss_renderflags[0]));
 	memset(&no_renderflags[0], 0, level.nodes.Size() * sizeof(no_renderflags[0]));
 

src/hwrenderer/scene/hw_drawinfo.h

@@ -170,7 +170,7 @@ struct HWDrawInfo
 
 	TArray<subsector_t *> HandledSubsectors;
 
-	TArray<uint8_t> sectorrenderflags;
+	TArray<uint8_t> section_renderflags;
 	TArray<uint8_t> ss_renderflags;
 	TArray<uint8_t> no_renderflags;
 

src/hwrenderer/scene/hw_drawstructs.h

@@ -27,6 +27,7 @@ struct FSpriteModelFrame;
 struct particle_t;
 class FRenderState;
 struct GLDecal;
+struct FSection;
 enum area_t : int;
 
 enum HWRenderStyle
@@ -293,6 +294,7 @@ class GLFlat
 {
 public:
 	sector_t * sector;
+	FSection *section;
 	float z; // the z position of the flat (only valid for non-sloped planes)
 	FMaterial *gltexture;
 

src/hwrenderer/scene/hw_flats.cpp

@@ -189,6 +189,8 @@ void GLFlat::DrawSubsectors(HWDrawInfo *di, FRenderState &state)
 		SetupLights(di, sector->lighthead, lightdata, sector->PortalGroup);
 	}
 	state.SetLightIndex(dynlightindex);
+
+
 	if (vcount > 0 && !di->ClipLineShouldBeActive())
 	{
 		state.DrawIndexed(DT_Triangles, iboindex, vcount);
@@ -197,6 +199,7 @@ void GLFlat::DrawSubsectors(HWDrawInfo *di, FRenderState &state)
 	}
 	else
 	{
+		/*
 		int index = iboindex;
 		bool applied = false;
 		for (int i = 0; i < sector->subsectorcount; i++)
@@ -213,6 +216,7 @@ void GLFlat::DrawSubsectors(HWDrawInfo *di, FRenderState &state)
 			}
 			index += (sub->numlines - 2) * 3;
 		}
+		*/
 	}
 
 	if (!(renderflags&SSRF_RENDER3DPLANES))
@@ -473,7 +477,7 @@ void GLFlat::ProcessSector(HWDrawInfo *di, sector_t * frontsector)
 	extsector_t::xfloor &x = sector->e->XFloor;
 	dynlightindex = -1;
 
-	uint8_t &srf = di->sectorrenderflags[sector->sectornum];
+	uint8_t &srf = di->section_renderflags[level.sections.SectionIndex(section)];
     const auto &vp = di->Viewpoint;
 
 	//

src/hwrenderer/scene/hw_renderhacks.cpp

@@ -850,7 +850,8 @@ void HWDrawInfo::PrepareUnhandledMissingTextures()
 
 			if (seg->linedef->validcount == validcount) continue;		// already done
 			seg->linedef->validcount = validcount;
-			if (!(sectorrenderflags[seg->backsector->sectornum] & SSRF_RENDERFLOOR)) continue;
+			int section = level.sections.SectionNumForSidedef(seg->sidedef);
+			if (!(section_renderflags[section] & SSRF_RENDERFLOOR)) continue;
 			if (seg->frontsector->GetPlaneTexZ(sector_t::floor) > Viewpoint.Pos.Z) continue;	// out of sight
 			if (seg->backsector->transdoor) continue;
 			if (seg->backsector->GetTexture(sector_t::floor) == skyflatnum) continue;