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65 lines
1.9 KiB
C++
65 lines
1.9 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "Materials/MaterialExpressionLandscapeVisibilityMask.h"
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#include "Engine/Engine.h"
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#include "Engine/Texture.h"
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#include "EngineGlobals.h"
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#include "MaterialCompiler.h"
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#include "Materials/Material.h"
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#define LOCTEXT_NAMESPACE "Landscape"
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///////////////////////////////////////////////////////////////////////////////
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// UMaterialExpressionLandscapeVisibilityMask
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///////////////////////////////////////////////////////////////////////////////
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FName UMaterialExpressionLandscapeVisibilityMask::ParameterName = FName("__LANDSCAPE_VISIBILITY__");
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UMaterialExpressionLandscapeVisibilityMask::UMaterialExpressionLandscapeVisibilityMask(const FObjectInitializer& ObjectInitializer)
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: Super(ObjectInitializer)
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{
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// Structure to hold one-time initialization
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struct FConstructorStatics
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{
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FText NAME_Landscape;
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FConstructorStatics()
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: NAME_Landscape(LOCTEXT("Landscape", "Landscape"))
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{
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}
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};
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static FConstructorStatics ConstructorStatics;
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#if WITH_EDITORONLY_DATA
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MenuCategories.Add(ConstructorStatics.NAME_Landscape);
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#endif
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}
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#if WITH_EDITOR
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int32 UMaterialExpressionLandscapeVisibilityMask::Compile(class FMaterialCompiler* Compiler, int32 OutputIndex)
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{
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int32 MaskLayerCode = Compiler->StaticTerrainLayerWeight(ParameterName, Compiler->Constant(0.f));
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return MaskLayerCode == INDEX_NONE ? Compiler->Constant(1.f) : Compiler->Sub(Compiler->Constant(1.f), MaskLayerCode);
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}
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#endif // WITH_EDITOR
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UObject* UMaterialExpressionLandscapeVisibilityMask::GetReferencedTexture() const
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{
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return GEngine->WeightMapPlaceholderTexture;
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}
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#if WITH_EDITOR
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void UMaterialExpressionLandscapeVisibilityMask::GetLandscapeLayerNames(TArray<FName>& OutLayers) const
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{
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OutLayers.AddUnique(ParameterName);
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}
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void UMaterialExpressionLandscapeVisibilityMask::GetCaption(TArray<FString>& OutCaptions) const
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{
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OutCaptions.Add(FString(TEXT("Landscape Visibility Mask")));
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}
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#endif // WITH_EDITOR
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#undef LOCTEXT_NAMESPACE
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