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is an interactive constraint-based dataflow programming environment which is particularly suited to problems that arise in computer graphics. In addition to traditional dataflow functions, CONDOR dataflow elements can perform efficient derivative evaluation and interval arithmetic. As a result, CONDOR is able to support constraints, dynamics, surface trimming, collision testing, and a variety of other computations which are difficult or impossible to implement in traditional dataflow systems.
Michael Kass (Wed,) studied this question.