126 lines
4.1 KiB
C++
126 lines
4.1 KiB
C++
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#pragma once
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#include "hw_levelmesh.h"
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#include "tarray.h"
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#include "vectors.h"
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#include "r_defs.h"
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#include "bounds.h"
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#include <dp_rect_pack.h>
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#include <set>
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typedef dp::rect_pack::RectPacker<int> RectPacker;
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struct FLevelLocals;
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struct DoomLevelMeshSurface : public LevelMeshSurface
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{
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subsector_t* Subsector = nullptr;
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side_t* Side = nullptr;
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sector_t* ControlSector = nullptr;
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float* TexCoords;
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};
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class DoomLevelMesh : public LevelMesh
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{
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public:
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DoomLevelMesh(FLevelLocals &doomMap);
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void CreatePortals();
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void DumpMesh(const FString& objFilename, const FString& mtlFilename) const;
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void BindLightmapSurfacesToGeometry(FLevelLocals& doomMap);
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void PackLightmapAtlas();
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bool TraceSky(const FVector3& start, FVector3 direction, float dist)
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{
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FVector3 end = start + direction * dist;
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auto surface = Trace(start, direction, dist);
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return surface && surface->bSky;
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}
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void UpdateLightLists() override;
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LevelMeshSurface* GetSurface(int index) override { return &Surfaces[index]; }
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unsigned int GetSurfaceIndex(const LevelMeshSurface* surface) const override { return (unsigned int)(ptrdiff_t)(static_cast<const DoomLevelMeshSurface*>(surface) - Surfaces.Data()); }
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int GetSurfaceCount() override { return Surfaces.Size(); }
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TArray<DoomLevelMeshSurface> Surfaces;
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std::vector<std::unique_ptr<LevelMeshLight>> Lights;
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TArray<FVector2> LightmapUvs;
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static_assert(alignof(FVector2) == alignof(float[2]) && sizeof(FVector2) == sizeof(float) * 2);
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// utility
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TArray<int> sectorGroup; // index is sector, value is sectorGroup
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// runtime utility variables
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TMap<const sector_t*, TArray<DoomLevelMeshSurface*>> XFloorToSurface;
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TMap<const sector_t*, TArray<DoomLevelMeshSurface*>> XFloorToSurfaceSides;
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private:
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void BuildSectorGroups(const FLevelLocals& doomMap);
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void CreateSubsectorSurfaces(FLevelLocals &doomMap);
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void CreateCeilingSurface(FLevelLocals& doomMap, subsector_t* sub, sector_t* sector, sector_t* controlSector, int typeIndex);
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void CreateFloorSurface(FLevelLocals& doomMap, subsector_t* sub, sector_t* sector, sector_t* controlSector, int typeIndex);
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void CreateSideSurfaces(FLevelLocals &doomMap, side_t *side);
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void SetSubsectorLightmap(DoomLevelMeshSurface* surface);
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void SetSideLightmap(DoomLevelMeshSurface* surface);
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void SetupLightmapUvs();
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void PropagateLight(const LevelMeshLight* light, std::set<LevelMeshPortal, RecursivePortalComparator>& touchedPortals, int lightPropagationRecursiveDepth);
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void CreateLightList();
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static bool IsTopSideSky(sector_t* frontsector, sector_t* backsector, side_t* side);
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static bool IsTopSideVisible(side_t* side);
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static bool IsBottomSideVisible(side_t* side);
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static bool IsSkySector(sector_t* sector, int plane);
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static bool IsControlSector(sector_t* sector);
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static FVector4 ToPlane(const FVector3& pt1, const FVector3& pt2, const FVector3& pt3)
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{
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FVector3 n = ((pt2 - pt1) ^ (pt3 - pt2)).Unit();
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float d = pt1 | n;
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return FVector4(n.X, n.Y, n.Z, d);
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}
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static FVector4 ToPlane(const FVector3& pt1, const FVector3& pt2, const FVector3& pt3, const FVector3& pt4)
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{
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if (pt1.ApproximatelyEquals(pt3))
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{
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return ToPlane(pt1, pt2, pt4);
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}
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else if(pt1.ApproximatelyEquals(pt2) || pt2.ApproximatelyEquals(pt3))
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{
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return ToPlane(pt1, pt3, pt4);
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}
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return ToPlane(pt1, pt2, pt3);
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}
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static FVector2 ToFVector2(const DVector2& v) { return FVector2((float)v.X, (float)v.Y); }
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static FVector3 ToFVector3(const DVector3& v) { return FVector3((float)v.X, (float)v.Y, (float)v.Z); }
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static FVector4 ToFVector4(const DVector4& v) { return FVector4((float)v.X, (float)v.Y, (float)v.Z, (float)v.W); }
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static bool IsDegenerate(const FVector3 &v0, const FVector3 &v1, const FVector3 &v2);
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// WIP internal lightmapper
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enum PlaneAxis
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{
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AXIS_YZ = 0,
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AXIS_XZ,
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AXIS_XY
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};
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static PlaneAxis BestAxis(const FVector4& p);
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BBox GetBoundsFromSurface(const LevelMeshSurface& surface) const;
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inline int AllocUvs(int amount) { return LightmapUvs.Reserve(amount); }
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void BuildSurfaceParams(int lightMapTextureWidth, int lightMapTextureHeight, LevelMeshSurface& surface);
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void FinishSurface(int lightmapTextureWidth, int lightmapTextureHeight, RectPacker& packer, LevelMeshSurface& surface);
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};
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