MaterialExpressionTextureSampleParameter.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 "Misc/Guid.h"
#include "Materials/MaterialExpressionTextureSample.h"
#include "MaterialExpressionTextureSampleParameter.generated.h"
 
class UTexture;
struct FMaterialParameterInfo;
 
UCLASS(collapsecategories, abstract, hidecategories=Object, MinimalAPI)
class UMaterialExpressionTextureSampleParameter : public UMaterialExpressionTextureSample
{
    GENERATED_UCLASS_BODY()
 
    UPROPERTY(EditAnywhere, Category=MaterialExpressionTextureSampleParameter)
    FName ParameterName;
 
    UPROPERTY()
    FGuid ExpressionGUID;
 
    UPROPERTY(EditAnywhere, Category=MaterialExpressionTextureSampleParameter)
    FName Group;
 
    UPROPERTY(EditAnywhere, Category = MaterialExpressionTextureSampleParameter)
    int32 SortPriority = 32;
 
    //~ Begin UMaterialExpression Interface
#if WITH_EDITOR
    ENGINE_API virtual void Build(MIR::FEmitter& Emitter) override;
    ENGINE_API virtual int32 Compile(class FMaterialCompiler* Compiler, int32 OutputIndex) override;
    ENGINE_API virtual void GetCaption(TArray<FString>& OutCaptions) const override;
    ENGINE_API virtual bool MatchesSearchQuery(const TCHAR* SearchQuery) override;
    virtual bool CanRenameNode() const override { return true; }
    ENGINE_API virtual FString GetEditableName() const override;
    ENGINE_API virtual void SetEditableName(const FString& NewName) override;
 
    virtual bool HasAParameterName() const override { return true; }
    virtual FName GetParameterName() const override { return ParameterName; }
    virtual void SetParameterName(const FName& Name) override { ParameterName = Name; }
    ENGINE_API virtual void ValidateParameterName(const bool bAllowDuplicateName) override;
    virtual bool GetParameterValue(FMaterialParameterMetadata& OutMeta) const override
    {
        OutMeta.Value = Texture;
        OutMeta.Description = Desc;
        OutMeta.ExpressionGuid = ExpressionGUID;
        OutMeta.Group = Group;
        OutMeta.SortPriority = SortPriority;
        OutMeta.AssetPath = GetAssetPathName();
        OutMeta.ChannelNames = GetTextureChannelNames();
        return true;
    }
    virtual bool SetParameterValue(const FName& Name, const FMaterialParameterMetadata& Meta, EMaterialExpressionSetParameterValueFlags Flags) override
    {
        if (Meta.Value.Type == EMaterialParameterType::Texture)
        {
            if (SetParameterValue(Name, Meta.Value.Texture, Flags))
            {
                if (EnumHasAnyFlags(Flags, EMaterialExpressionSetParameterValueFlags::AssignGroupAndSortPriority))
                {
                    Group = Meta.Group;
                    SortPriority = Meta.SortPriority;
                }
                return true;
            }
        }
        return false;
    }
#endif
    //~ End UMaterialExpression Interface
 
#if WITH_EDITOR
    ENGINE_API bool SetParameterValue(FName InParameterName, UTexture* InValue, EMaterialExpressionSetParameterValueFlags Flags = EMaterialExpressionSetParameterValueFlags::None);
 
    ENGINE_API virtual bool TextureIsValid(UTexture* InTexture, FString& OutMessage);
 
    ENGINE_API virtual void SetDefaultTexture();
#endif // WITH_EDITOR
 
    virtual FGuid& GetParameterExpressionId() override
    {
        return ExpressionGUID;
    }
};