Hi Michele, Michele Bosi wrote: > Hi all, > my program needs to select some lines, since > osgViewer->computeIntersections is unable to pick lines I switched to > osgUtil::PolytopeIntersector which is able to do so. Unfortunately > PolytopeIntersector seems unable to tell me the intersection > points/lines from which I would determine the closest object that I > actually picked (among all the other that intersect the picking > volume). Am I missing something? hope so.
In the current state the PolytopeIntersector does not store intersection points or primitive indices. I do have a version that does so, but it needs some cleanup before I am willing to submit it. Right now I do not have much time but I hope that can submit a version next week. > To sum up, is there a way to determine the closest object picked by a > osgUtil::PolytopeIntersector (actually not the closest object but the > one which has the closest intersection)? Or, are there other ways to > pick a line object? That's exactly what my enhancement of the PolytopeIntersector does. It uses a "reference plane" and sorts the intersections according to the distance to that reference plane. Of course there are other ways to pick lines: One could use cylinders or cones which surround the pick-ray for intersecting lines but this is not implemented within OpenSceneGraph (yet). > Regards, > Michele Peter > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > -- ________________________________creating IT solutions Peter Hrenka science + computing ag Software Solutions Hagellocher Weg 73 phone +49 7071 9457 263 72070 Tuebingen, Germany fax +49 7071 9457 511 [EMAIL PROTECTED] www.science-computing.de -- Vorstand/Board of Management: Dr. Bernd Finkbeiner, Dr. Florian Geyer, Dr. Roland Niemeier, Dr. Arno Steitz, Dr. Ingrid Zech Vorsitzender des Aufsichtsrats/ Chairman of the Supervisory Board: Prof. Dr. Hanns Ruder Sitz/Registered Office: Tuebingen Registergericht/Registration Court: Stuttgart Registernummer/Commercial Register No.: HRB 382196 _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
