41 lines
1.8 KiB
C
41 lines
1.8 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 "VoxelData/VoxelDataAccelerator.h"
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#include "VoxelRender/Meshers/VoxelMesher.h"
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/**
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* This code is based on an original implementation kindly provided by Dexyfex
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* You can check out his website here: https://dexyfex.com/
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*/
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#define SN_CHUNK_SIZE (RENDER_CHUNK_SIZE + 1) /* +1 since SN vertices are within cells */
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#define SN_EXTENDED_CHUNK_SIZE (RENDER_CHUNK_SIZE + 3) /* +3 to get parent's outer edge */
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class FVoxelSurfaceNetMesher : 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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private:
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TUniquePtr<FVoxelConstDataAccelerator> Accelerator;
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FVoxelValue CachedValues[SN_EXTENDED_CHUNK_SIZE * SN_EXTENDED_CHUNK_SIZE * SN_EXTENDED_CHUNK_SIZE];
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float EdgeFactors[SN_EXTENDED_CHUNK_SIZE * SN_EXTENDED_CHUNK_SIZE * SN_EXTENDED_CHUNK_SIZE * 3]; // edge blending factors for each cell, X,Y,Z
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uint32 VertexIndices[SN_CHUNK_SIZE * SN_CHUNK_SIZE * SN_CHUNK_SIZE]; // final vertex indices, per voxel. 65535 if no vertex
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uint8 VertexSNCases[SN_CHUNK_SIZE * SN_CHUNK_SIZE * SN_CHUNK_SIZE]; // surface net voxel cases for each cell
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// The material position is detected in a first step
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TVoxelStaticArray<FIntVector, SN_EXTENDED_CHUNK_SIZE * SN_EXTENDED_CHUNK_SIZE * SN_EXTENDED_CHUNK_SIZE> MaterialPositions;
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template<typename TVertex>
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void CreateGeometryTemplate(FVoxelMesherTimes& Times, TArray<uint32>& Indices, TArray<TVertex>& Vertices);
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};
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