MaterialExpressionTransformPosition.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
 
#pragma once
 
#include "CoreMinimal.h"
#include "UObject/ObjectMacros.h"
#include "MaterialExpressionIO.h"
#include "Materials/MaterialExpression.h"
#include "MaterialExpressionTransformPosition.generated.h"
 
UENUM()
enum EMaterialPositionTransformSource : int
{
    TRANSFORMPOSSOURCE_Local UMETA(DisplayName="Local Space"),
    
    TRANSFORMPOSSOURCE_World UMETA(DisplayName="Absolute World Space"),
 
    TRANSFORMPOSSOURCE_PeriodicWorld UMETA(DisplayName="Periodic World Space"),
    
    TRANSFORMPOSSOURCE_TranslatedWorld  UMETA(DisplayName="Camera Relative World Space"),
 
    TRANSFORMPOSSOURCE_FirstPersonTranslatedWorld  UMETA(DisplayName = "First Person Space (Camera Relative World Space)"),
 
    TRANSFORMPOSSOURCE_View  UMETA(DisplayName="View Space"),
 
    TRANSFORMPOSSOURCE_Camera  UMETA(DisplayName="Camera Space"),
 
    TRANSFORMPOSSOURCE_Particle UMETA(Hidden, DisplayName = "Mesh Particle Space"),
 
    TRANSFORMPOSSOURCE_Instance UMETA(DisplayName = "Instance & Particle Space"),
 
    TRANSFORMPOSSOURCE_MAX,
};
 
UCLASS(collapsecategories, hidecategories=Object, MinimalAPI)
class UMaterialExpressionTransformPosition : public UMaterialExpression
{
    GENERATED_BODY()
 
public:
 
    UPROPERTY()
    FExpressionInput Input;
 
    UPROPERTY(EditAnywhere, Category=MaterialExpressionTransformPosition, meta=(DisplayName = "Source", ShowAsInputPin = "Advanced", InvalidEnumValues="TRANSFORMPOSSOURCE_FirstPersonTranslatedWorld"))
    TEnumAsByte<enum EMaterialPositionTransformSource> TransformSourceType = TRANSFORMPOSSOURCE_Local;
 
    UPROPERTY(EditAnywhere, Category=MaterialExpressionTransformPosition, meta=(DisplayName = "Destination", ShowAsInputPin = "Advanced"))
    TEnumAsByte<enum EMaterialPositionTransformSource> TransformType = TRANSFORMPOSSOURCE_Local;
 
    UPROPERTY(meta=(DisplayName = "Periodic World Tile Size", ToolTip = "Distance the camera can move before the world origin is moved", RequiredInput = "false"))
    FExpressionInput PeriodicWorldTileSize;
 
    UPROPERTY(meta = (DisplayName = "First Person Interpolation Alpha", ToolTip = "Interpolates between world space and first person space. Valid range is [0, 1], from world space to first person space. Defaults to 'ConstFirstPersonInterpolationAlpha' if not specified.", RequiredInput = "false"))
    FExpressionInput FirstPersonInterpolationAlpha;
 
    UPROPERTY(EditAnywhere, Category=MaterialExpressionTransformPosition, meta=(DisplayName = "Periodic World Tile Size", ClampMin=0.0001, UIMax=524288.0, OverridingInputProperty = "PeriodicWorldTileSize", EditCondition=bUsesPeriodicWorldPosition, EditConditionHides, HideEditConditionToggle))
    float ConstPeriodicWorldTileSize = 32.0;
 
    UPROPERTY(EditAnywhere, Category=MaterialExpressionTransformPosition, meta=(DisplayName = "First Person Interpolation Alpha", UIMin = 0.0f, UIMax = 1.0f, ClampMin = 0.0f, ClampMax = 1.0f, OverridingInputProperty = "FirstPersonInterpolationAlpha", EditCondition = bUsesFirstPersonInterpolationAlpha, EditConditionHides, HideEditConditionToggle))
    float ConstFirstPersonInterpolationAlpha = 1.0f;
 
private:
    UPROPERTY()
    bool bUsesPeriodicWorldPosition = false;
    
    UPROPERTY()
    bool bUsesFirstPersonInterpolationAlpha = false;
 
public:
 
    //~ Begin UMaterialExpression Interface
#if WITH_EDITOR
    virtual void Build(MIR::FEmitter& Em) override;
    virtual int32 Compile(class FMaterialCompiler* Compiler, int32 OutputIndex) override;
    virtual void GetConnectorToolTip(int32 InputIndex, int32 OutputIndex, TArray<FString>& OutToolTip) override;
    virtual void GetCaption(TArray<FString>& OutCaptions) const override;
    virtual TArrayView<FExpressionInput*> GetInputsView() override;
    virtual FExpressionInput* GetInput(int32 InputIndex) override;
    virtual FName GetInputName(int32 InputIndex) const override;
    virtual void PostEditChangeProperty(struct FPropertyChangedEvent& PropertyChangedEvent) override;
#endif
    //~ End UMaterialExpression Interface
 
private:
    int32 GetAbsoluteInputIndex(int32 InputIndex);
};