MaterialExpressionRerouteBase.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "Materials/MaterialExpression.h"
#include "MaterialExpressionRerouteBase.generated.h"
 
class FMaterialExpressionKey;
 
UCLASS(abstract, MinimalAPI)
class UMaterialExpressionRerouteBase : public UMaterialExpression
{
    GENERATED_BODY()
 
public:
 
    ENGINE_API UMaterialExpression* TraceInputsToRealExpression(int32& OutputIndex) const;
 
    ENGINE_API FExpressionInput TraceInputsToRealInput() const;
 
    //~ Begin UMaterialExpression Interface
#if WITH_EDITOR
    ENGINE_API virtual EMaterialValueType GetInputValueType(int32 InputIndex) override;
    ENGINE_API virtual EMaterialValueType GetOutputValueType(int32 OutputIndex) override;
    ENGINE_API virtual bool IsResultMaterialAttributes(int32 OutputIndex) override;
    ENGINE_API virtual bool IsResultSubstrateMaterial(int32 OutputIndex) override;
    ENGINE_API void GatherSubstrateMaterialInfo(FSubstrateMaterialInfo& SubstrateMaterialInfo, int32 OutputIndex) override;
    ENGINE_API FSubstrateOperator* SubstrateGenerateMaterialTopologyTree(class FMaterialCompiler* Compiler, class UMaterialExpression* Parent, int32 OutputIndex) override;
#endif
    //~ End UMaterialExpression Interface
 
protected:
     virtual bool GetRerouteInput(FExpressionInput& OutInput) const { return false; }
 
private:
    ENGINE_API FExpressionInput TraceInputsToRealExpressionInternal(TSet<FMaterialExpressionKey>& VisitedExpressions) const;
};