Move math3d classes from GUI to CORE

Looking at the classes of math3d I can see no obvious reason why this mathematical methods are in GUI.

This classification forces geometrical database/calculation backends/servers that should keep/operate-on QVector[234]d and associated geometrical QMatrix4d, QQuaternion, QGenericMatrix to load GUI.

In my understading of Qt's Model-View pattern, I do not see a mathematical calcualtion as a part of a Graphical User Interface. The GUI could offer requesting parameters for a world view matrix, but calculation of the view is not part of a GUI. Showing the result (e.g. rendered bitmap) is part of the GUI.

In addition, the sparse documentation and the introduction of Qt3d could be a nice time point to move the classes...?

Or must something moving of classes like this be hold back until 6.0?