On the one hand, we don't provide common methods like Vector to Matrix multiplication, on the other hand, we make it particular hard to convert from XML3D Data types to array based datatypes like glMatrix.
we should extend our matrix interfaces (I would like to see at least a Matrix Vector multiplication option)
we should get a way to access the datatypes as arrays (like a getArray method) that allows to a quick conversion to other libraries like glMatrix.
On the one hand, we don't provide common methods like Vector to Matrix multiplication, on the other hand, we make it particular hard to convert from XML3D Data types to array based datatypes like glMatrix.