I would like to at runtime in blueprints to get the name of any given material parameter(s) parent group, is that possible?
Example below, I would like the string “Variant” from the parameter “Blackwash Color”. I already know how to get/set material parameters and that works great, I want to make some UI based off of the group.
It seems with C++ this is possible but not in a blueprint UMaterial::GetGroupName | Unreal Engine Documentation
I’ll answer my own question. Below is the custom C++ needed to expose this data in a crude way back to blueprints, it works, but there is nothing native in blueprints right now to get a parameter group.
.cpp
FString UFullMaterialProperties::GetMaterialInstanceProperties(UMaterialInstanceDynamic * Material)
{
FString result;
for (FVectorParameterValue param : Material->VectorParameterValues)
{
FName group;
Material->GetGroupName(param.ParameterInfo, group);
result.Append(param.ParameterInfo.Name.ToString());
result.Append(":");
result.Append(group.ToString());
}
return result;
}
.h
UCLASS()
class UFullMaterialProperties : public UBlueprintFunctionLibrary
{
GENERATED_BODY()
UFUNCTION(BlueprintCallable, Category = "AAAMatProps")
static FString GetMaterialInstanceProperties(UMaterialInstanceDynamic* Material);
};
Then use this in your blueprint. You create a dynamic material instance and copy all the properties, if you dont copy the properties then it wont pick up the groups.
