92 lines
2.5 KiB
C
92 lines
2.5 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 "VoxelWorld.h"
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#include "VoxelMaterial.h"
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#include "VoxelUtilities/VoxelMaterialUtilities.h"
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struct VOXEL_API FVoxelHardnessHandler
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{
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public:
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explicit FVoxelHardnessHandler(const AVoxelWorld& World);
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FORCEINLINE float GetHardness(const FVoxelMaterial& Material) const
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{
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return FMath::Max(GetHardnessInternal(Material), KINDA_SMALL_NUMBER);
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}
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FORCEINLINE bool NeedsToCompute() const
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{
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return bNeedsToCompute;
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}
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private:
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const EVoxelMaterialConfig MaterialConfig;
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const EVoxelRGBHardness RGBHardness;
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TVoxelStaticArray<float, 256> Hardness;
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bool bNeedsToCompute;
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FORCEINLINE float GetHardnessInternal(const FVoxelMaterial& Material) const
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{
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switch (MaterialConfig)
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{
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case EVoxelMaterialConfig::RGB:
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{
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switch (RGBHardness)
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{
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case EVoxelRGBHardness::FourWayBlend:
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{
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const auto Strengths = FVoxelUtilities::GetFourWayBlendStrengths(Material);
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return
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Hardness[0] * Strengths[0] +
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Hardness[1] * Strengths[1] +
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Hardness[2] * Strengths[2] +
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Hardness[3] * Strengths[3];
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}
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case EVoxelRGBHardness::FiveWayBlend:
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{
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const auto Strengths = FVoxelUtilities::GetFiveWayBlendStrengths(Material);
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return
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Hardness[0] * Strengths[0] +
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Hardness[1] * Strengths[1] +
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Hardness[2] * Strengths[2] +
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Hardness[3] * Strengths[3] +
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Hardness[4] * Strengths[4];
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}
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case EVoxelRGBHardness::R: return Material.GetR_AsFloat();
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case EVoxelRGBHardness::G: return Material.GetG_AsFloat();
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case EVoxelRGBHardness::B: return Material.GetB_AsFloat();
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case EVoxelRGBHardness::A: return Material.GetA_AsFloat();
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case EVoxelRGBHardness::U0: return Material.GetU0_AsFloat();
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case EVoxelRGBHardness::U1: return Material.GetU1_AsFloat();
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case EVoxelRGBHardness::V0: return Material.GetV0_AsFloat();
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case EVoxelRGBHardness::V1: return Material.GetV1_AsFloat();
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default:
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{
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checkVoxelSlow(false);
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return 1;
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}
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}
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}
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case EVoxelMaterialConfig::SingleIndex:
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{
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return Hardness[Material.GetSingleIndex()];
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}
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case EVoxelMaterialConfig::MultiIndex:
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{
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const auto Strengths = FVoxelUtilities::GetMultiIndexStrengths(Material);
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return
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Hardness[Material.GetMultiIndex_Index0()] * Strengths[0] +
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Hardness[Material.GetMultiIndex_Index1()] * Strengths[1] +
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Hardness[Material.GetMultiIndex_Index2()] * Strengths[2] +
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Hardness[Material.GetMultiIndex_Index3()] * Strengths[3];
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}
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default:
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{
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checkVoxelSlow(false);
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return 1;
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}
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}
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}
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};
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