OSG doesn't assume left- or right-handed coordinates. It is based on OpenGL, in which object coordinate space is left-handed, but can easily be switched to right-handed with a negative scale.
In my experience, most transformation confusion stems from not knowing whether to pre- or post-multiply matrices or quats together. To be completely honest, I find it's easier (for me, personally) to simply try it both ways to determine which one produces the results I want, rather than try to keep track in my head of which API works which way. It doesn't help that OSG uses the opposite of the OpenGL API that it's built upon. Hope that helps, Paul Martz Skew Matrix Software LLC http://www.skew-matrix.com +1 303 859 9466 > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf > Of Mrs. Mister > Sent: Monday, June 09, 2008 2:14 PM > To: OpenSceneGraph Users > Subject: [osg-users] Coordinate Systems and Quaternions > > hi, > > i am working with osg 2.4, osgCal 0.3.0 and cal 3d 0.11. > > in the cal3d faq i read: > > "It should also be noted that Cal3D's math classes assume a > left-handed rotation system." > > i have trouble with setting the quaternions from osg to the > cal3d model. > > which coordinate system do osg::Quat use? > or, where can i read about the coordinate systems used in osg? > > bye > henry > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-opensce negraph.org _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
