113 lines
3.6 KiB
C
113 lines
3.6 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 "VoxelMaterialCollectionBase.h"
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#include "VoxelLandscapeMaterialCollection.generated.h"
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struct FMaterialParameterInfo;
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class UMaterialInstanceConstant;
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USTRUCT(BlueprintType)
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struct FVoxelLandscapeMaterialCollectionLayer
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{
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GENERATED_BODY()
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UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "Config")
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FName Name;
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UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Config")
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uint8 Index = 0;
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};
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USTRUCT(BlueprintType)
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struct FVoxelLandscapeMaterialCollectionPermutation
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{
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GENERATED_BODY()
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UPROPERTY(EditAnywhere, Category = "Config")
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FName Names[6];
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bool operator==(const FVoxelLandscapeMaterialCollectionPermutation& Other) const
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{
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return
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Names[0] == Other.Names[0] &&
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Names[1] == Other.Names[1] &&
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Names[2] == Other.Names[2] &&
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Names[3] == Other.Names[3] &&
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Names[4] == Other.Names[4] &&
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Names[5] == Other.Names[5];
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}
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FString ToString() const
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{
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return FString::Printf(TEXT("%s,%s,%s,%s,%s,%s"),
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*Names[0].ToString(),
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*Names[1].ToString(),
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*Names[2].ToString(),
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*Names[3].ToString(),
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*Names[4].ToString(),
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*Names[5].ToString());
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}
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};
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inline uint32 GetTypeHash(const FVoxelLandscapeMaterialCollectionPermutation& Key)
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{
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return
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HashCombine(GetTypeHash(Key.Names[0]),
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HashCombine(GetTypeHash(Key.Names[1]),
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HashCombine(GetTypeHash(Key.Names[2]),
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HashCombine(GetTypeHash(Key.Names[3]),
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HashCombine(GetTypeHash(Key.Names[4]), GetTypeHash(Key.Names[5]))))));
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}
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// Material collection that does not generate any blending and is just a list of materials
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UCLASS(BlueprintType)
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class VOXEL_API UVoxelLandscapeMaterialCollection : public UVoxelMaterialCollectionBase
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{
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GENERATED_BODY()
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public:
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UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Config", meta = (ClampMin = 1, ClampMax = 6, UIMin = 1, UIMax = 6))
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int32 MaxMaterialsToBlendAtOnce = 6;
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UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Config")
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TObjectPtr<UMaterialInterface> Material = nullptr;
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UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "Layers")
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TArray<FVoxelLandscapeMaterialCollectionLayer> Layers;
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UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = "Cache")
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mutable TMap<FVoxelLandscapeMaterialCollectionPermutation, TObjectPtr<UMaterialInstanceConstant>> MaterialCache;
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public:
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//~ Begin UVoxelMaterialCollectionBase Interface
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virtual int32 GetMaxMaterialIndices() const override { return FMath::Clamp(MaxMaterialsToBlendAtOnce, 1, 6); }
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virtual UMaterialInterface* GetVoxelMaterial(const FVoxelMaterialIndices& Indices, uint64 UniqueIdForErrors) const override;
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virtual UMaterialInterface* GetIndexMaterial(uint8 Index) const override;
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virtual TArray<FMaterialInfo> GetMaterials() const override;
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virtual int32 GetMaterialIndex(FName Name) const override;
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virtual void InitializeCollection() override;
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//~ End UVoxelMaterialCollectionBase Interface
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// Begin UObject Interface
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#if WITH_EDITOR
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virtual void PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent) override;
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#endif
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// End UObject Interface
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private:
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UMaterialInstanceConstant* FindOrAddPermutation(const FVoxelLandscapeMaterialCollectionPermutation& Permutation) const;
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#if WITH_EDITOR
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UMaterialInstanceConstant* CreateInstanceForPermutation(const FVoxelLandscapeMaterialCollectionPermutation& Permutation) const;
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void ForeachMaterialParameterName(TFunctionRef<void(FName)> Lambda) const;
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bool NeedsToBeConvertedToVoxel() const;
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void FixupLayers();
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void CleanupCache() const;
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#endif
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UPROPERTY(Transient)
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TMap<int32, FVoxelLandscapeMaterialCollectionLayer> IndicesToLayers;
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};
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