99 lines
3.6 KiB
C
99 lines
3.6 KiB
C
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// Copyright 2020 Phyronnaz
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#pragma once
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#include "CoreMinimal.h"
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#include "VoxelContainers/VoxelStaticArray.h"
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#include "VoxelData/VoxelDataAccelerator.h"
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#include "VoxelRender/Meshers/VoxelMesher.h"
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#define CHUNK_SIZE_WITH_END_EDGE (RENDER_CHUNK_SIZE + 1)
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#define CHUNK_SIZE_WITH_NORMALS (RENDER_CHUNK_SIZE + 3)
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#define EDGE_INDEX_COUNT 4
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class FVoxelMarchingCubeMesher : public FVoxelMesher
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{
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public:
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using FVoxelMesher::FVoxelMesher;
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protected:
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virtual FVoxelIntBox GetBoundsToCheckIsEmptyOn() const override final;
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virtual FVoxelIntBox GetBoundsToLock() const override final;
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virtual TVoxelSharedPtr<FVoxelChunkMesh> CreateFullChunkImpl(FVoxelMesherTimes& Times) override final;
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virtual void CreateGeometryImpl(FVoxelMesherTimes& Times, TArray<uint32>& Indices, TArray<FVector>& Vertices) override final;
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public:
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// For GetGradient template
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FORCEINLINE FVoxelValue GetValue(int32 X, int32 Y, int32 Z, int32 InLOD) const
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{
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checkVoxelSlow(LOD == 0);
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checkVoxelSlow(InLOD == 0);
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checkVoxelSlow(-1 <= X && X < CHUNK_SIZE_WITH_NORMALS - 1);
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checkVoxelSlow(-1 <= Y && Y < CHUNK_SIZE_WITH_NORMALS - 1);
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checkVoxelSlow(-1 <= Z && Z < CHUNK_SIZE_WITH_NORMALS - 1);
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return CachedValues[(X + 1) + (Y + 1) * CHUNK_SIZE_WITH_NORMALS + (Z + 1) * CHUNK_SIZE_WITH_NORMALS * CHUNK_SIZE_WITH_NORMALS];
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}
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private:
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// Use LOD0 size as it's bigger
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using FCachedValues = TVoxelStaticArray<FVoxelValue, CHUNK_SIZE_WITH_NORMALS * CHUNK_SIZE_WITH_NORMALS * CHUNK_SIZE_WITH_NORMALS>;
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using FCache = TVoxelStaticArray<int32, RENDER_CHUNK_SIZE * RENDER_CHUNK_SIZE * EDGE_INDEX_COUNT>;
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TUniquePtr<FCachedValues> CachedValuesStorage = MakeUnique<FCachedValues>();
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TUniquePtr<FCache> CacheStorageA = MakeUnique<FCache>();
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TUniquePtr<FCache> CacheStorageB = MakeUnique<FCache>();
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TUniquePtr<FVoxelConstDataAccelerator> Accelerator;
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FVoxelValue* RESTRICT const CachedValues = CachedValuesStorage->GetData();
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// Cache to get index of already created vertices
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int32* RESTRICT CurrentCache = CacheStorageA->GetData();
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int32* RESTRICT OldCache = CacheStorageB->GetData();
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private:
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// T: will be created as T(IntersectionPoint, MaterialPosition)
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template<typename T>
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bool CreateGeometryTemplate(FVoxelMesherTimes& Times, TArray<uint32>& Indices, TArray<T>& Vertices);
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private:
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static int32 GetCacheIndex(int32 EdgeIndex, int32 LX, int32 LY);
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friend class FMarchingCubeHelpers;
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};
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#define TRANSITION_EDGE_INDEX_COUNT 10
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class FVoxelMarchingCubeTransitionsMesher : public FVoxelTransitionsMesher
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{
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public:
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using FVoxelTransitionsMesher::FVoxelTransitionsMesher;
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protected:
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virtual FVoxelIntBox GetBoundsToCheckIsEmptyOn() const override final;
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virtual FVoxelIntBox GetBoundsToLock() const override final;
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virtual TVoxelSharedPtr<FVoxelChunkMesh> CreateFullChunkImpl(FVoxelMesherTimes& Times) override final;
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private:
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TUniquePtr<FVoxelConstDataAccelerator> Accelerator;
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TVoxelStaticArray<int32, RENDER_CHUNK_SIZE * RENDER_CHUNK_SIZE * TRANSITION_EDGE_INDEX_COUNT> Cache2D;
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private:
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// T: will be created as T(IntersectionPoint, MaterialPosition, bNeedToTranslate)
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template<typename T>
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bool CreateGeometryTemplate(FVoxelMesherTimes& Times, TArray<uint32>& Indices, TArray<T>& Vertices);
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template<uint8 Direction, typename T>
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bool CreateGeometryForDirection(FVoxelMesherTimes& Times, TArray<uint32>& Indices, TArray<T>& Vertices);
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private:
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static int32 GetCacheIndex(int32 EdgeIndex, int32 LX, int32 LY);
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template<uint8 Direction>
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FVoxelValue GetValue(int32 X, int32 Y, int32 InLOD) const;
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template<uint8 Direction>
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FIntVector Local2DToGlobal(int32 X, int32 Y, int32 Z) const;
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friend class FMarchingCubeHelpers;
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};
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