Because of DEF/USE the scene graph is directed acyclic graph
(in Script nodes there is also a way to produce a cycle,
this was discussed in www-vrml a few months ago. This
cycle is important to access the node containing a
Script node from within the script).
Here is how you get a DAG:
DEF X SomeNode { }
Transform { children [ USE X
Transfrom { children USE X } ]
}
Now the inner and the outer Transform node are
both parents of X !!!
This doesn't mean that I don't want a PARENT keyword,
I just cannot think of a clean semantics for it.
Any suggestions?
-- Stephan
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Dr. Stephan Diehl Tel.: ++49-681/302-3915
EMAIL: diehl@cs.uni-sb.de WWW: http://www.rw.cdl.uni-saarland.de/private/diehl
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