Hi Robert -- Would you object strongly to making dirtyBound() a virtual function? In my custom node, I need to catch when the bounding box changes and make some modifications to the scene graph as a result. Currently, I'm overriding computeBounds() to do this. But because computeBounds() is const, I have to cast away const in order to perform non-const operations like modifying scene graph data. It turns out this doesn't work anyway, because thread collisions occur in multithread situations. Dirtying the bounding box seems to be an inherently non-const operation. Yet there doesn't appear to be a way for code to act on that change in a non-const way. Changing the declaration of dirtyBound() to virtual would allow custom Nodes to take non-const action on the bounding box change. Paul Martz Skew Matrix Software LLC http://www.skew-matrix.com <http://www.skew-matrix.com/> 303 859 9466
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