121 lines
2.9 KiB
C++
121 lines
2.9 KiB
C++
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// Copyright 2020 Phyronnaz
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#include "VoxelMaterialBuilder.h"
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#include "VoxelUtilities/VoxelMaterialUtilities.h"
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void FVoxelMaterialBuilder::Clear()
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{
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MaterialConfig = EVoxelMaterialConfig(-1);
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MaterialOverride.Reset();
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Color = FColor{ ForceInit };
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SingleIndex = 0;
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Wetness = 0;
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Us.Memzero();
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Vs.Memzero();
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IndicesStrengths.Reset();
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}
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FVoxelMaterial FVoxelMaterialBuilder::Build() const
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{
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if (MaterialOverride.IsSet())
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{
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return MaterialOverride.GetValue();
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}
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FVoxelMaterial Material{ ForceInit };
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if (MaterialConfig == EVoxelMaterialConfig::RGB)
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{
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Material.SetColor(Color);
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Material.SetU0(Us[0]);
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Material.SetU1(Us[1]);
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Material.SetU2(Us[2]);
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Material.SetU3(Us[3]);
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Material.SetV0(Vs[0]);
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Material.SetV1(Vs[1]);
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Material.SetV2(Vs[2]);
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Material.SetV3(Vs[3]);
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}
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else if (MaterialConfig == EVoxelMaterialConfig::SingleIndex)
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{
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Material.SetColor(Color);
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Material.SetSingleIndex(SingleIndex);
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Material.SetU0(Us[0]);
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Material.SetU1(Us[1]);
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Material.SetU2(Us[2]);
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Material.SetU3(Us[3]);
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Material.SetV0(Vs[0]);
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Material.SetV1(Vs[1]);
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Material.SetV2(Vs[2]);
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Material.SetV3(Vs[3]);
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}
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else
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{
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check(MaterialConfig == EVoxelMaterialConfig::MultiIndex);
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TVoxelStaticArray<uint8, 4> MaterialIndices{ ForceInit };
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TVoxelStaticArray<float, 3> Alphas{ ForceInit };
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if (IndicesStrengths.Num() > 0)
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{
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TVoxelStaticArray<float, 4> MaterialStrengths{ ForceInit };
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uint32 LockedChannels = 0;
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const auto AddIndexStrength = [&](int32 Index, const FIndexStrength& IndexStrength)
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{
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MaterialIndices[Index] = IndexStrength.Index;
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MaterialStrengths[Index] = IndexStrength.Strength;
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if (IndexStrength.bLocked)
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{
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LockedChannels |= 1 << IndexStrength.Index;
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}
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};
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if (IndicesStrengths.Num() > 4)
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{
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const TVoxelStaticArray<TTuple<int32, FIndexStrength>, 4> Stack = FVoxelUtilities::FindTopXElements<4>(IndicesStrengths, [&](auto& A, auto& B) { return A.Strength < B.Strength; });
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AddIndexStrength(0, Stack[0].Get<1>());
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AddIndexStrength(1, Stack[1].Get<1>());
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AddIndexStrength(2, Stack[2].Get<1>());
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AddIndexStrength(3, Stack[3].Get<1>());
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}
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else
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{
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for (int32 Index = 0; Index < IndicesStrengths.Num(); Index++)
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{
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AddIndexStrength(Index, IndicesStrengths[Index]);
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}
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}
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Alphas = FVoxelUtilities::XWayBlend_StrengthsToAlphas_Static<4>(MaterialStrengths, LockedChannels);
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}
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Material.SetMultiIndex_Wetness(Wetness);
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Material.SetMultiIndex_Blend0_AsFloat(Alphas[0]);
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Material.SetMultiIndex_Blend1_AsFloat(Alphas[1]);
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Material.SetMultiIndex_Blend2_AsFloat(Alphas[2]);
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Material.SetMultiIndex_Index0(MaterialIndices[0]);
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Material.SetMultiIndex_Index1(MaterialIndices[1]);
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Material.SetMultiIndex_Index2(MaterialIndices[2]);
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Material.SetMultiIndex_Index3(MaterialIndices[3]);
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Material.SetU2(Us[2]);
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Material.SetU3(Us[3]);
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Material.SetV2(Vs[2]);
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Material.SetV3(Vs[3]);
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}
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return Material;
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}
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