FWaterUtils::GetOrCreateTransientMID

Creates a transient [UMaterialInstanceDynamic](API\Runtime\Engine\Materials\UMaterialInstanceDynamic) out of the material interface in input or returns the existing one if it's compatible (same parent material)

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References

Module	Water
Header	/Engine/Plugins/Experimental/Water/Source/Runtime/Public/WaterUtils.h
Include	#include "WaterUtils.h"
Source	/Engine/Plugins/Experimental/Water/Source/Runtime/Private/WaterUtils.cpp

Syntax

static UMaterialInstanceDynamic * GetOrCreateTransientMID
(
    UMaterialInstanceDynamic * InMID,
    FName InMIDName,
    UMaterialInterface * InMaterialInterface,
    EObjectFlags InAdditionalObjectFlags
)

Remarks

Creates a transient UMaterialInstanceDynamic out of the material interface in input or returns the existing one if it's compatible (same parent material)

Returns

a compatible transient MID if InMaterialInterface is valid, nullptr otherwise

Parameters

Parameter	Description
InMID	is the current MID currently used. It will be the one returned if it's already compatible with InMaterialInterface
InMIDName	is the UObject's name in case we need to create a MID
InMaterialInterface	is the parent material interface of the desired MID: can be a UMaterial or UMaterialInstanceConstant, in which case a MID can be created, or a UMaterialInstanceDynamic, which will just be returned as-is (as we can't create MID out of another). In the latter case, it is expected to be a transient MID. InMID is read-only so it's up to the caller to decide to update or not the MID. Usually, the calling code will be : MID = FWaterUtils::GetOrCreateTransientMID(MID, ...)
InAdditionalObjectFlags	is the additional flags that should be set on the newly-created object, if any (it will come out with at least RF_Transient as the name of the function implies)