HI Elliott, >From the sound of it all you need to do is put your line segment in the local coordinates of your wand then transform this line segment by the inverse of the wand matrix to take it into world coordinates, then start your traversal from above the boardMatrixTransform.
Robert. On Fri, Nov 12, 2010 at 10:07 PM, Elliott Dicus <[email protected]> wrote: > Hello Robert, > > Thanks for your reply! > > I'll try to clarify since I don't think my picture shows in the mailing list. > :o > > Essentially I have a scene like this: > > 1) Under root is sceneNode, it has these children: wandMatrixTransform and > boardMatrixTransform > 2) wandMatrixTransform has a child with geometry that represents a picking > device. I want to use the position of this for my intersection test. > 3) boardMatrixTransform has a child with geometry that represents a game > board. I want to test for intersections with this. > > So, it's not a case of mouse picking and window/eye coordinates like the > example. I have a moving object in the scene that I want to use to find > intersections with a sibling node. > > To do this, I think my IntersectionVisitor should start on sceneNode. Is this > correct? > I also think I need to use my wandMatrixTransform to find my start and end > points in the coordinate system of sceneNode. Is this correct? > > Thank you again for your time and your response! Please let me know if I need > to clarify, I'm determined to get this working! :D > > -Elliott > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=33725#33725 > > > > > > _______________________________________________ > 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
