MaterialExpressionGenericConstant.h

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// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
 
#include "CoreMinimal.h"
#include "UObject/ObjectMacros.h"
#include "Materials/MaterialExpression.h"
#include "Shader/ShaderTypes.h"
#include "MaterialExpressionGenericConstant.generated.h"
 
UCLASS(abstract, MinimalAPI)
class UMaterialExpressionGenericConstant : public UMaterialExpression
{
    GENERATED_UCLASS_BODY()
 
    virtual UE::Shader::FValue GetConstantValue() const PURE_VIRTUAL(UMaterialExpressionGenericConstant::GetConstantValue, return UE::Shader::FValue(););
 
    //~ Begin UMaterialExpression Interface
#if WITH_EDITOR
    virtual void Build(MIR::FEmitter& Emitter) override;
    virtual int32 Compile(class FMaterialCompiler* Compiler, int32 OutputIndex) override;
    virtual void GetCaption(TArray<FString>& OutCaptions) const override;
    virtual FString GetDescription() const override;
#endif // WITH_EDITOR
 
    //~ End UMaterialExpression Interface
};
 
UCLASS(collapsecategories, hidecategories = Object, MinimalAPI)
class UMaterialExpressionConstantDouble : public UMaterialExpressionGenericConstant
{
    GENERATED_UCLASS_BODY()
 
    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = MaterialExpressionConstant, meta = (ShowAsInputPin = "Primary"))
    double Value;
 
    virtual UE::Shader::FValue GetConstantValue() const override { return Value; }
};