Hi Neil, Use the Node::setNodeMask() to set which subgraphs you want to be active, then set the TraversalMask on the IntersectionVisitor to pick out the appropriate parts.
Robert. On Nov 8, 2007 12:19 PM, <[EMAIL PROTECTED]> wrote: > Hi All, > > I have a quick question. I'm playing with picking objects in a scene using > the pickhandler example. The scene is essentially a big box whose faces face > inwards. Within the box I have a smaller box whose faces face outwards. If I > am outside both boxes, looking into the outer box, the pickhandler returns > both the outer box, face that I have hit, and the inner box faces that I have > hit. As the outer box face is actually facing away from me, I want to > exclude it. Is there an easy way to do this? > > My thinking was that I essentially need to look at the normal of the face > that I hit, and the direction of view vector for the camera, take the dot > product, and if positive exclude it. Does this sound right? Is there an > easier way/structure that I should use? > > Many thanks for any help > > Neil. > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
