MaterialDependencyWalker.h

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// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
 
#if WITH_EDITOR
 
#include "CoreMinimal.h"
 
class UMaterialExpression;
 
struct FMaterialDependencySearchMetadata
{
    FMaterialDependencySearchMetadata() :
        bHasTextureInput(0)
    {
    }
 
    uint32 bHasTextureInput : 1;
};
 
enum EMaterialDependencySearchFlags
{
    MDSF_TextureDependencyOnly = (1 << 0),
};
 
 
// Walks the dependency graph (i.e. all expression inputs) of the specified material expression.
// Returns the maxmium depth the search went or INDEX_NONE if the limit has reached before finding anything.
// @param SearchFlags can be a bitwise OR combination of EMaterialDependencySearchFlags.
ENGINE_API int32 WalkMaterialDependencyGraph(const UMaterialExpression* Expression, int32 MaxDepth, uint32 SearchFlags, FMaterialDependencySearchMetadata& OutMetaData);
 
 
#endif // WITH_EDITOR