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> Unreal Engine API Reference > Runtime > Engine > Materials > UMaterialFunctionInterface

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UMaterialFunctionInterface

A Material Function is a collection of material expressions that can be reused in different materials

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Inheritance Hierarchy

UObjectBase

UObjectBaseUtility

UObject

UMaterialFunctionInterface

UMaterialFunction

	UMaterialFunctionMaterialLayer
	UMaterialFunctionMaterialLayerBlend

UMaterialFunctionInstance

	UMaterialFunctionMaterialLayerBlendInstance
	UMaterialFunctionMaterialLayerInstance

References

Module	Engine
Header	/Engine/Source/Runtime/Engine/Classes/Materials/MaterialFunctionInterface.h
Include	#include "Materials/MaterialFunctionInterface.h"

Syntax

class UMaterialFunctionInterface : public UObject

Remarks

A Material Function is a collection of material expressions that can be reused in different materials

Variables

	Name	Description
uint32	CombinedInputTypes
uint32	CombinedOutputTypes
EMaterialFuncti...	MaterialFunctionUsage	The intended usage of this function, required for material layers.
FGuid	StateId	Used by materials using this function to know when to recompile.
UThumbnailInfo ...	ThumbnailInfo	Information for thumbnail rendering

Constructors

	Name	Description
	UMaterialFunctionInterface ( const FObjectInitializer& ObjectIn... )

Functions

	Name	Description
int32	Compile ( FMaterialCompiler* Compiler, const FFunctionExpressionOutput& O... )
void	GetAllExpressionsOfType ( TArray< ExpressionType* >& Ou..., const bool bRecursive )	Get all expressions of the requested type, recursing through any function expressions in the function
void	GetAllParameterInfo ( TArray< FMaterialParameterInfo >& ..., TArray< FGuid >& OutParameterIds, const FMaterialParameterInfo& InBa... )	Finds the names of all matching type parameters
UMaterialFun...	GetBaseFunction()
const UMater...	GetBaseFunction()
void	GetDependentFunctions ( TArray< UMaterialFunctionInterface ... )	Returns an array of the functions that this function is dependent on, directly or indirectly.
const FStrin...	GetDescription()
const TArray...	GetFunctionExpressions()
void	GetInputsAndOutputs ( TArray< struct FFunctionExpressionI..., TArray< struct FFunctionExpressionO... )
EMaterialFun...	GetMaterialFunctionUsage()
bool	GetNamedParameterOfType ( const FHashedMaterialParameterInfo ..., ExpressionType& Parameter, UMaterialFunctionInterface... )	Finds the first matching parameter by name and type
bool	GetParameterDesc ( const FHashedMaterialParameterInfo ..., FString& OutDesc )	Finds the first matching parameter's description
bool	GetParameterGroupName ( const FHashedMaterialParameterInfo ..., FName& OutGroup )	Finds the first matching parameter's group name
bool	GetParameterSortPriority ( const FHashedMaterialParameterInfo ..., int32& OutSortPriority )	Finds the first matching parameter's group name
UMaterialInt...	GetPreviewMaterial()
bool	GetReentrantFlag()
bool	HasAnyExpressionsOfType()	Get all expressions of the requested type, recursing through any function expressions in the function
bool	HasFlippedCoordinates()	Checks whether a Material Function is arranged in the old style, with inputs flowing from right to left
bool	IsDependent ( UMaterialFunctionInterface* Ot... )
bool	IterateDependentFunctions ( TFunctionRef< bool... )	Iterates all functions that this function is dependent on, directly or indrectly.
void	LinkIntoCaller ( const TArray< FFunctionExpressionIn... )
bool	OverrideNamedFontParameter ( const FHashedMaterialParameterInfo ..., UFont*& OutFontValue, int32& OutFontPage )
bool	OverrideNamedRuntimeVirtualTextureParameter ( const FHashedMaterialParameterInfo ..., URuntimeVirtualTexture*& OutVa... )
bool	OverrideNamedScalarParameter ( const FHashedMaterialParameterInfo ..., float& OutValue )
bool	OverrideNamedStaticComponentMaskParameter ( const FHashedMaterialParameterInfo ..., bool& OutR, bool& OutG, bool& OutB, bool& OutA, FGuid& OutExpressionGuid )
bool	OverrideNamedStaticSwitchParameter ( const FHashedMaterialParameterInfo ..., bool& OutValue, FGuid& OutExpressionGuid )
bool	OverrideNamedTextureParameter ( const FHashedMaterialParameterInfo ..., UTexture*& OutValue )
bool	OverrideNamedVectorParameter ( const FHashedMaterialParameterInfo ..., FLinearColor& OutValue )
void	SetReentrantFlag ( const bool bIsReentrant )
void	UnlinkFromCaller()
void	UpdateFromFunctionResource()
void	UpdateInputOutputTypes()
bool	UpdateParameterSet ( ParameterType& Parameter )	Returns if any of the matching parameters have changed
bool	ValidateFunctionUsage ( FMaterialCompiler* Compiler, const FFunctionExpressionOutput& O... )

Overridden from UObject

		Name	Description
	void	GetAssetRegistryTags ( TArray< FAssetRegistryTag >& OutTa... )	Gathers a list of asset registry searchable tags which are name/value pairs with some type information This only needs to be implemented for asset objects
	void	PostEditChangeProperty ( FPropertyChangedEvent& PropertyCha... )	Called when a property on this object has been modified externally

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