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84 lines
2.2 KiB
C++
84 lines
2.2 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "Materials/MaterialExpressionLandscapeLayerSample.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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// UMaterialExpressionLandscapeLayerSample
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///////////////////////////////////////////////////////////////////////////////
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UMaterialExpressionLandscapeLayerSample::UMaterialExpressionLandscapeLayerSample(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 UMaterialExpressionLandscapeLayerSample::Compile(class FMaterialCompiler* Compiler, int32 OutputIndex)
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{
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const int32 WeightCode = Compiler->StaticTerrainLayerWeight(ParameterName, Compiler->Constant(PreviewWeight));
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if (WeightCode == INDEX_NONE)
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{
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// layer is not used in this component, sample value is 0.
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return Compiler->Constant(0.f);
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}
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else
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{
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return WeightCode;
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}
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}
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#endif // WITH_EDITOR
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UObject* UMaterialExpressionLandscapeLayerSample::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 UMaterialExpressionLandscapeLayerSample::GetCaption(TArray<FString>& OutCaptions) const
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{
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OutCaptions.Add(FString::Printf(TEXT("Sample '%s'"), *ParameterName.ToString()));
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}
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bool UMaterialExpressionLandscapeLayerSample::MatchesSearchQuery(const TCHAR* SearchQuery)
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{
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TArray<FString> Captions;
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GetCaption(Captions);
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for (const FString& Caption : Captions)
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{
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if (Caption.Contains(SearchQuery))
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{
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return true;
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}
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}
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return Super::MatchesSearchQuery(SearchQuery);
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}
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void UMaterialExpressionLandscapeLayerSample::GetLandscapeLayerNames(TArray<FName>& OutLayers) const
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{
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OutLayers.AddUnique(ParameterName);
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}
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#endif // WITH_EDITOR
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#undef LOCTEXT_NAMESPACE
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