Hi Julien-Charles, The interesection code only using the node bounding spheres during traversal, it doesn't use them for the final intersection calculation as this is done against the actual primitives of the drawable leaves. I can't say way is wrong with your setup, but it won't be a parental bounding sphere issue.
Robert. On Tue, Sep 15, 2009 at 8:24 PM, Julien-Charles Levesque < levesque...@gmail.com> wrote: > Hi, > > I am using LineSegmentIntersectors with IntersectionVisitor to do some ray > casting in my architecture. Everything works fine to select and move > objects. However I want to implement a drag-and-drop interaction, where I > can move an object onto another and have something different happen. I want > to obtain this object using the ray casting as well, so I cast a ray and > check to get the first object in Intersections that is not my current object > (which I saved in a member variable at the beginning of my drag-and-drop). > > It all works fine until I start interacting with parent/child objects. I > have a sphere and a cube, the sphere is the parent of the cube. When I > drag-and-drop my cube over black space, the IntersectionVisitor returns me > the sphere (the parent) as the second object intersected even though there > is nothing behind the cube at the place I dropped it. > > Now I believe this has something to do with the parent's bounding sphere > including it's children and thus being counted as an intersection, but I'm > not sure how I can deal with this kind of stuff. Then again, I could be > mistaken. > > I tried reading about bounding spheres in the reference guide and did not > see much, neither could I get much information (or enough information ;) > about IntersectionVisitors.. any help would be strongly appreciated ! > > > Thanks in advance ! > > Sincerely, > Julien-Charles > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=17395#17395 > > > > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
_______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
