MaterialExpressionCurveAtlasRowParameter.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
#pragma once
 
#include "CoreMinimal.h"
#include "UObject/ObjectMacros.h"
#include "MaterialValueType.h"
#include "Materials/MaterialExpressionScalarParameter.h"
#include "MaterialExpressionCurveAtlasRowParameter.generated.h"
 
UCLASS(collapsecategories, hidecategories=(Object, MaterialExpressionScalarParameter), MinimalAPI)
class UMaterialExpressionCurveAtlasRowParameter : public UMaterialExpressionScalarParameter
{
    GENERATED_UCLASS_BODY()
 
    UPROPERTY(EditAnywhere, Category=MaterialExpressionCurveAtlasRowParameter)
    TObjectPtr<class UCurveLinearColor> Curve;
 
    UPROPERTY(EditAnywhere, Category = MaterialExpressionCurveAtlasRowParameter)
    TObjectPtr<class UCurveLinearColorAtlas> Atlas;
 
    UPROPERTY()
    FExpressionInput InputTime;
 
    virtual bool IsUsedAsAtlasPosition() const override { return true; }
    virtual UObject* GetReferencedTexture() const override;
    virtual bool CanReferenceTexture() const { return true; }
 
#if WITH_EDITOR
    virtual bool GetParameterValue(FMaterialParameterMetadata& OutMeta) const override;
    virtual bool SetParameterValue(const FName& Name, const FMaterialParameterMetadata& Meta, EMaterialExpressionSetParameterValueFlags Flags) override;
 
    virtual EMaterialValueType GetInputValueType(int32 InputIndex) override 
    {
        return MCT_Float;
    }
 
    virtual bool IsInputConnectionRequired(int32 InputIndex) const override { return true; }
    virtual int32 Compile(class FMaterialCompiler* Compiler, int32 OutputIndex) override;
    virtual void GetTexturesForceMaterialRecompile(TArray<UTexture *> &Textures) const override;
    virtual void PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent) override;
    virtual void GetCaption(TArray<FString>& OutCaptions) const override 
    {
        OutCaptions.Empty();
        OutCaptions.Add(TEXT(""));
    }
//~ Begin UMaterialExpression Interface
    virtual FName GetInputName(int32 InputIndex) const override
    {
        return TEXT("CurveTime");
    }
 
#endif
};