Hi Art, I've never tried it myself, but the OSG should be able to support cyclic graphs, just not out of the box. The way I'd do it is have a custom Update/Event/CullCallback that is attached to a node in the cycle, these callbacks count the number of times through in each traversal, once an max number of cycles in reach the traversal is stopped - simply be not calling the traverse method.
One of the more tricky parts will be making the callbacks thread safe - much more of an issue of the cull traversal as update and event traversals are strictly single threaded so one can store state local to the callback itself. For a thread safe cull traversal I guess you might be able to use the NodePath that the NodeVisitor accumulates as it traverses as a measure of how many times the cycle has been completed. I'd guess you should be able to write such a callback with just a few lines of code. Perhaps this would be a nice little exercise for the community ;-) Robert. _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
