:Status: Incomplete After changing ``gzz.vob.VobCoorder`` these methods should also be implemented in all implementing classes, which inherit ``gzz.vob.VobCoorder``. Because culling is already implemented in ``gzz.gfx.gl.GLVobCoorder``, currently classes left seem to be: * ``gzz.vob.impl.OrthoCoorder`` **NOTE:** ``CullingCoordsys`` is currently implemented only on the C++ side, but ``OrthoCoorder`` is not allowed to use JNI. *Dummy* ``CullingCoordSys`` can be implented on the Java side as ``translate(parent, 0, 0)``.