Hi Sanat, Am 03.03.2011 20:21, schrieb Sanat Talmaki: > Hi, > > I want to test for intersection in my scene using a cylinder instead of a > line segment. > > For example if my object is on a terrain I want to highlight all features > that are within an imaginary cylinder around my object. > > I read about polytope intersector but it seems as though that is for planes > only or can I get cylinder intersector from there as well ?
You could use the PolytopeIntersector with a hexagonal shape which envelops the cylinder and post-process the results. This sould give you a good aproximation and little false positives. As was noted by Chris PolytopeIntersector can be very slow if there are many Intersections in the picking volume. That is because every primitive and every vertex that is inside the volume is recorded in the result. The kd-tree is not integrated into PolytopeIntersector as of now. > Any tips on how I can get started will be much appreciated. > > Thanks! > > Sincerely, > Sanat. > > ------------------ Cheers, Peter -- Vorstand/Board of Management: Dr. Bernd Finkbeiner, Dr. Roland Niemeier, Dr. Arno Steitz, Dr. Ingrid Zech Vorsitzender des Aufsichtsrats/ Chairman of the Supervisory Board: Michel Lepert Sitz/Registered Office: Tuebingen Registergericht/Registration Court: Stuttgart Registernummer/Commercial Register No.: HRB 382196 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
