>>>>> "BH" == Bryce Harrington <bryce at osg.samsung.com> writes: BH> So is adding px and py the right approach? It would be better to support the full 3x3 matrix, rather than force the last element to be 1.0. -JimC -- James Cloos <cloos at jhcloos.com> OpenPGP: 0x997A9F17ED7DAEA6