60 lines
1.7 KiB
C++
60 lines
1.7 KiB
C++
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// Copyright 2020 Phyronnaz
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#include "VoxelTools/VoxelTextureTools.h"
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#include "VoxelTools/VoxelToolHelpers.h"
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enum class EMinMax : uint8
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{
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Min,
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Max
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};
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template<EMinMax MinMax>
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FVoxelFloatTexture MinMaxImpl(const FVoxelFloatTexture& Texture, const float Radius)
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{
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VOXEL_TOOL_FUNCTION_COUNTER(Texture.Texture.GetSizeX() * Texture.Texture.GetSizeY());
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auto& Data = Texture.Texture;
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const int32 SizeX = Data.GetSizeX();
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const int32 SizeY = Data.GetSizeY();
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const auto NewTextureDataPtr = MakeVoxelShared<TVoxelTexture<float>::FTextureData>();
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auto& NewTextureData = *NewTextureDataPtr;
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NewTextureData.SetSize(SizeX, SizeY);
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const int32 CeilRadius = FMath::CeilToInt(Radius);
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const int32 RadiusSquared = FMath::CeilToInt(FMath::Square(Radius));
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for (int32 X = 0; X < SizeX; X++)
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{
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for (int32 Y = 0; Y < SizeY; Y++)
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{
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float MinMaxValue = MinMax == EMinMax::Min ? MAX_flt : -MAX_flt;
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for (int32 U = -CeilRadius; U <= CeilRadius; U++)
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{
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for (int32 V = -CeilRadius; V <= CeilRadius; V++)
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{
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if (U * U + V * V <= RadiusSquared)
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{
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const float OtherValue = Data.SampleRaw(X + U, Y + V, EVoxelSamplerMode::Clamp);
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MinMaxValue = MinMax == EMinMax::Min ? FMath::Min(MinMaxValue, OtherValue) : FMath::Max(MinMaxValue, OtherValue);
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}
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}
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}
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NewTextureData.SetValue(X, Y, MinMaxValue);
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}
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}
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return FVoxelFloatTexture{ TVoxelTexture<float>{NewTextureDataPtr} };
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}
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FVoxelFloatTexture UVoxelTextureTools::Minimum(FVoxelFloatTexture Texture, float Radius)
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{
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VOXEL_FUNCTION_COUNTER();
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return MinMaxImpl<EMinMax::Min>(Texture, Radius);
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}
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FVoxelFloatTexture UVoxelTextureTools::Maximum(FVoxelFloatTexture Texture, float Radius)
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{
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VOXEL_FUNCTION_COUNTER();
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return MinMaxImpl<EMinMax::Max>(Texture, Radius);
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}
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