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Representing dimensions, tolerances, and features in MCAE systems

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3 Author(s)
D. C. Gossard ; Dept. of Mech. Eng., MIT, Cambridge, MA, USA ; R. P. Zuffante ; H. Sakurai

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.<>

Published in:

IEEE Computer Graphics and Applications  (Volume:8 ,  Issue: 2 )