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Unreal Engine C++ API Reference > Runtime > Engine > Materials > UMaterialExpression
References
| Module | Engine |
| Header | /Engine/Source/Runtime/Engine/Classes/Materials/MaterialExpression.h |
| Include | #include "Materials/MaterialExpression.h" |
| Source | /Engine/Source/Runtime/Engine/Private/Materials/MaterialExpressions.cpp |
void UpdateMaterialExpressionGuid
&40;
bool bForceGeneration,
bool bAllowMarkingPackageDirty
&41;
Remarks
Generates a GUID for this expression if one doesn't already exist.
Parameters
| Name | Description |
|---|---|
| bForceGeneration | Whether we should generate a GUID even if it is already valid. |