MaterialExpressionSwitch.h

Go to the documentation of this file.

// Copyright Epic Games, Inc. All Rights Reserved.
 
 
#pragma once
 
#include "CoreMinimal.h"
#include "UObject/ObjectMacros.h"
#include "MaterialExpressionIO.h"
#include "Materials/MaterialExpression.h"
#include "MaterialValueType.h"
#include "MaterialExpressionSwitch.generated.h"
 
struct FPropertyChangedEvent;
 
UENUM()
enum ESwitchMaterialOutputType : int
{
    TMMOT_Float1,
    TMMOT_Float2,
    TMMOT_Float3,
    TMMOT_Float4,
    TMMOT_MAX,
};
 
USTRUCT()
struct FSwitchCustomInput
{
    GENERATED_USTRUCT_BODY()
 
    UPROPERTY(EditAnywhere, Category=CustomInput)
    FName InputName;
 
    UPROPERTY()
    FExpressionInput Input;
};
 
UCLASS(collapsecategories, hidecategories=Object, MinimalAPI)
class UMaterialExpressionSwitch : public UMaterialExpression
{
    GENERATED_UCLASS_BODY()
 
    UPROPERTY(EditAnywhere, Category= UMaterialExpressionSwitch)
    FString Description = TEXT("Switch");
 
    UPROPERTY(meta = (RequiredInput = "false", ToolTip = "Defaults to 'ConstSwitchValue' if not specified"))
    FExpressionInput SwitchValue;
 
    UPROPERTY(EditAnywhere, Category= UMaterialExpressionSwitch, meta=(OverridingInputProperty = "SwitchValue"))
    float ConstSwitchValue;
 
    UPROPERTY(meta = (RequiredInput = "false", ToolTip = "Defaults to 'ConstDefault' if not specified"))
    FExpressionInput Default;
 
    UPROPERTY(EditAnywhere, Category= UMaterialExpressionSwitch, meta=(OverridingInputProperty = "Default"))
    float ConstDefault;
 
    UPROPERTY(EditAnywhere, Category= UMaterialExpressionSwitch)
    TArray<struct FSwitchCustomInput> Inputs;
 
    //~ Begin UObject Interface.
#if WITH_EDITOR
    virtual void PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent) override;
    void RebuildOutputs();
#endif // WITH_EDITOR
    virtual void Serialize(FStructuredArchive::FRecord Record) override;
    //~ End UObject Interface.
    
    //~ 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 FText GetCreationName() const override { return FText::FromString(TEXT("Switch")); }
    virtual TArrayView<FExpressionInput*> GetInputsView() override;
    virtual FExpressionInput* GetInput(int32 InputIndex) override;
    virtual FName GetInputName(int32 InputIndex) const override;
    virtual EMaterialValueType GetInputValueType(int32 InputIndex) override {return MCT_Unknown;}
 
#endif // WITH_EDITOR
    //~ End UMaterialExpression Interface
};