Hi, I'll pitch in for this one :-)
You need to set the mask of the other nodes by removing the mask of your visitor. I tried to explain this with a simplified version of the mask using 4 bits to a collegue recently. Here it goes : root_node has 2 children, child_1 and child_2. my intersection visitor's node mask is like yours set to 0001 (0x1) child_2 node's mask is set to 0001 0001 : visitor 1111 : root_node 1111 : child_1 0001 : child_2 everybody matches your visitor's mask so everybody get's traversed now the correct solution would be to set child_1 node mask to the complement to the visitor's mask (here 1110) and don't touch the child_2's one : 0001 : visitor 1111 : root_node 1110 : child_1 1111 : child_2 now everybody except child_1 gets traversed... HTH P.S. Paul beat me into this one, but my explanation will hopefully make it more visual :-) 2008/7/3 Jason Beverage <[EMAIL PROTECTED]>: > Hi all, > > This is probably a very basic question, but I'm having a hard time > understanding how the traversal masks work when using an > IntersectionVisitor. > > I have a scene that contains an osgdem generated terrain database as well > as other nodes such as text labels, lines, etc. In certain situations, I > only want to compute the intersections against the terrain database. > > I created a node mask for the terrain, 0x1, and used setNodeMask to set it > on the root node of the terrain database. > > I am using the computeIntersections function of Viewer and passed along > that traversal mask hoping that it would only intersect the paged database. > However, the computeIntersections function is computing intersections > against all of the nodes in the scene graph instead of just the paged > database. > > Does this usage sound correct or am I way off base? > > Thanks! > > Jason > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > -- Mathieu
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