LandscapeMaterialInstanceConstant.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 "Materials/MaterialInstanceConstant.h"
#include "LandscapeMaterialInstanceConstant.generated.h"
 
USTRUCT()
struct FLandscapeMaterialTextureStreamingInfo
{
    GENERATED_USTRUCT_BODY()
 
    FLandscapeMaterialTextureStreamingInfo()
        : TexelFactor(0.0f)
    {}
 
    UPROPERTY()
    FName TextureName;
 
    UPROPERTY()
    float TexelFactor;
};
 
UCLASS(MinimalAPI)
class ULandscapeMaterialInstanceConstant : public UMaterialInstanceConstant
{
    GENERATED_UCLASS_BODY()
 
    UPROPERTY()
    TArray<FLandscapeMaterialTextureStreamingInfo> TextureStreamingInfo;
 
    UPROPERTY()
    uint32 bIsLayerThumbnail:1;
 
    UPROPERTY()
    uint32 bDisableTessellation_DEPRECATED:1;
 
    UPROPERTY()
    uint32 bMobile:1;
 
    UPROPERTY()
    uint32 bEditorToolUsage:1;
 
    virtual bool WritesToRuntimeVirtualTexture() const override;
 
    virtual void PostLoad() override;
#if WITH_EDITOR
    virtual void PostEditChangeProperty(FPropertyChangedEvent& PropertyChangedEvent) override;
#endif
    virtual FMaterialResource* AllocatePermutationResource() override;
    virtual bool HasOverridenBaseProperties() const override;
 
#if WITH_EDITOR
    FLandscapeMaterialTextureStreamingInfo& AcquireTextureStreamingInfo(const FName& TextureName);
    void UpdateCachedTextureStreaming();
#endif
 
public:
    float GetLandscapeTexelFactor(const FName& TextureName) const;
};