Hi Chris, I guess you want the scene to accept the IntersectionVisitor, not the camera. Laurens.
On Sat, Feb 1, 2020 at 1:18 PM OpenSceneGraph Users < osg-users@lists.openscenegraph.org> wrote: > I have a scene built with a few objects loaded, the most pertinent one > being a large plane surface centered at the origin. I want to cast a ray > from a particular point at a particular angle inside the scene and get a > list of everything it intersects—both the point of intersection and the > Node object. Most examples of using intersectors involve picking from the > window, so I haven't seen exactly what I wanted. But from what I've read, > the following should at least be close: > > Vec3d start( 0.0, 0.0, 100.0 ); > Vec3d end( 0.0, 0.0, -100.0 ); > ref_ptr<LineSegmentIntersector> intsec = new LineSegmentIntersector( > Intersector::MODEL, start, end ); > IntersectionVisitor iv( intsec.get() ); > viewer.getCamera()->accept( iv ); > cout << intsec->containsIntersections() << endl; > > My start and end points in this snippet are well above and well below the > surface object. So that plane object should definitely be intersected by a > line running between them. However the containsIntersections function > always returns false. > > Immediately after making this preliminary test pick, the program calls > viewer.run() so I know everything is arranged as expected in the scene. So > my guess is that I'm missunderstanding how the visitor works. Perhaps the > accept() function is not what I should be using to execute the intersector? > > ~ Chris > > > > -- > You received this message because you are subscribed to the Google Groups > "OpenSceneGraph Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to osg-users+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/osg-users/58d20034-cb65-4bef-937f-f85a1fa92030%40googlegroups.com > <https://groups.google.com/d/msgid/osg-users/58d20034-cb65-4bef-937f-f85a1fa92030%40googlegroups.com?utm_medium=email&utm_source=footer> > . > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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