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<p>A method is presented for explicitly representing dimensions, tolerances, and geometric features in solid models. The method combines CSG and boundary representations in a graph structure called an object graph. Dimensions are represented by a relative position operator. The method can automatically translate changes in dimensional values into corresponding changes in geometry and topology. The representation provides an important foundation for higher-level application programs to automate tolerance analysis and synthesis. The implementation of a prototype interactive polyhedral modeler based on this representation is presented.</p>

R. P. Zuffante, D. C. Gossard and H. Sakurai, "Representing Dimensions, Tolerances, and Features in MCAE Systems," in IEEE Computer Graphics and Applications, vol. 8, no. , pp. 51-59, 1988.
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