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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>
David C. Gossard, Robert P. Zuffante, Hiroshi Sakurai, "Representing Dimensions, Tolerances, and Features in MCAE Systems", IEEE Computer Graphics and Applications, vol. 8, no. , pp. 51-59, March/April 1988, doi:10.1109/38.503
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