49 lines
1.5 KiB
Text
49 lines
1.5 KiB
Text
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// Copyright 2020 Phyronnaz
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#pragma once
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#include "VoxelTools/Impl/VoxelLevelToolsImpl.h"
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#include "VoxelTools/Impl/VoxelToolsBaseImpl.inl"
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inline FVoxelIntBox FVoxelLevelToolsImpl::GetBounds(const FVoxelVector& Position, float Radius, float Height, bool bAdditive)
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{
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const float R = Radius + 2;
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if (bAdditive)
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{
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// Below
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return FVoxelIntBox(Position - FVector(R, R, Height + 1.f), Position + FVector(R, R, 1.f));
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}
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else
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{
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// Above
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return FVoxelIntBox(Position - FVector(R, R, 1.f), Position + FVector(R, R, Height + 1.f));
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}
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}
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template<typename TData>
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void FVoxelLevelToolsImpl::Level(TData& Data, const FVoxelVector& Position, float Radius, float Falloff, float Height, bool bAdditive)
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{
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const FVoxelIntBox Bounds = GetBounds(Position, Radius, Height, bAdditive);
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VOXEL_TOOL_FUNCTION_COUNTER(Bounds.Count());
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// Center the height
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const FVoxelVector CylinderPosition = Position + FVoxelVector(0, 0, (bAdditive ? -Height : Height) / 2);
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const float SquaredRadius = FMath::Square(Radius + 2);
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Data.template Set<FVoxelValue>(Bounds, [&](int32 X, int32 Y, int32 Z, FVoxelValue& Value)
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{
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const float SquaredDistance = FVector2D(X - Position.X, Y - Position.Y).SizeSquared();
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if (SquaredDistance <= SquaredRadius)
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{
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const float SDF = FVoxelUtilities::RoundCylinder(FVoxelVector(X, Y, Z) - CylinderPosition, Radius, Height, Falloff);
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if (bAdditive)
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{
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Value = FMath::Min(Value, FVoxelValue(SDF));
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}
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else
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{
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Value = FMath::Max(Value, FVoxelValue(-SDF));
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}
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}
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});
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}
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