> How exactly does OpenSceneGraph decide to place the origin of a > geometry-specific (i.e. local) coordinate system?
OSG does not decide this. It depends on how the geometry is specified. Imagine a unit cube with corners at (-.5,-.5,-.5) and (.5,.5,.5). OSG draws it with its center at the origin. Now imagine another unit cube, but with corners at (20,14.6,-32) and (21,15.6,-31). Its origin is still (0,0,0), but OSG draws it several units away from the origin because of the way it was "modeled". (And of course you can change the position of either of those cubes by using a Transform node such as MatrixTransform.) If this information seems unfamiliar to you, I would strongly encourage you to purchase and read through some introduction to 3D graphics books before you proceed with your work. It's important to have a firm grasp of coordinate spaces. -Paul _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
