Solved Cloner with multi-instance

Hello.

I want to support to fully support multi-instances in my render engine, but I find some difficulties with cloners.
I transfer the cloner data into my engine by reading the Cache. The problem is that the multi instances that exist inside the cloner have the parameter INSTANCEOBJECT_MULTIPOSITIONINPUT empty.
How can I get the multi instance positions from the cloner ?

Thank you for your time !

You can get the array with matrices using this member function:

const maxon::BaseArray<Matrix>* InstanceObject::GetInstanceMatrices() const

Cheers,
Frank

www.frankwilleke.de
Only asking personal code questions here.

hello,

I'm not sure if you are talking about a Mograph Cloner or an Instance with Instance Mode set to Multi-Instance.

For a Cloner Object you can retrieve the matrices inside the MoData like this

        BaseObject *mographObj = doc->GetActiveObject();
	if (mographObj == nullptr)
		return maxon::NullptrError(MAXON_SOURCE_LOCATION);


	BaseTag *tag = mographObj->GetTag(ID_MOTAGDATA);
	if (tag == nullptr)
		return maxon::NullptrError(MAXON_SOURCE_LOCATION);

	// populate the GetMoDataMessage instance by sending a MSG_GET_MODATA
	GetMoDataMessage modataMsg;
	if (!tag->Message(MSG_GET_MODATA, &modataMsg))
		return maxon::UnexpectedError(MAXON_SOURCE_LOCATION);

	if (!modataMsg.modata)
		return maxon::UnexpectedError(MAXON_SOURCE_LOCATION);

	
	// access the MoData from the returned GetMoDataMessage and check its validity
	MoData *moData = modataMsg.modata;
	if (!moData)
		return maxon::NullptrError(MAXON_SOURCE_LOCATION);

	// retrieve the number of Matrix items as well as the array containing the matrix for each of them
	maxon::Int32 matrixItemsCnt = moData->GetCount();
	maxon::Matrix* itemsMtxArray = static_cast<maxon::Matrix*>(moData->GetArray(MODATA_MATRIX));

If you are using An InstanceObject you can check our manual .
As @fwilleke80 said you have GetInstanceMatrices or you can read the multi-instanceData (example in the manual)

Cheers,
Manuel.

MAXON SDK Specialist

MAXON Registered Developer

hello,

without further addition on your part, this thread will be considered as solved tomorrow.

Cheers,
Manuel.

MAXON SDK Specialist

MAXON Registered Developer