Hi Robert, thanks for your quick answer. I think that a shader would be the best way at the moment. Do you know any literature or examples for this problem. If you have any ideas please let me know.
Thanks, Roland -----Ursprüngliche Nachricht----- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Im Auftrag von Robert Osfield Gesendet: Montag, 6. Oktober 2008 18:08 An: OpenSceneGraph Users Betreff: Re: [osg-users] Linesegment, shader Hi Roland, You'll need to be a be more specific about the nature of your problem, as this make a huge difference about what solutions you could possibly pursue. For instance if you don't need any results on the CPU and you want the results to be screen space then using shaders is a very good way tackle the problem, but if you need to results back on the CPU then using a GPU to do this would only work effectively in cases were you can wait for a CPU to GPU back to CPU round trip which is very expensive. Robert. On Mon, Oct 6, 2008 at 4:23 PM, Leitner, Roland <[EMAIL PROTECTED]> wrote: > > Dear all osg users, > > I meassure the distance of a ray (linesegment) from a given point (start > point of the ray) to the first intersection of this ray with any object > in the scene. Now I need more than one ray (up to 4000 rays) to simulate > a sensor. I have read that it could be done with a fragment shader, to > meassure the distances from any view pose to the object in sight. So, > maybe you have any ideas to solve this problem. > > Best regards, > > R. Leitner > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
