Hi, I think I got it now.
I combine both hud and callback approach. I created a slave camera similar to the one in the example, then add a update callback to it. In the callback I update the view matrix of the slave camera relate to the master camera's view matrix. so the views are basically the same between the slave and master camera, but for slave camera it was translated so it always look at my 3D axis object's center (which is (0, 0, 0) in my case to make it simple). It seems work fine now, but I would happy to know if there are other ways to do this. Thank you! Cheers, Jimmy ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=16363#16363 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org

