Downloaded from https://www.everyspec.com APPENDIX C MIL-STD-31000A Figure 26. Example of a cylindrical feature defined by a solid primitive. Figure 27. A geometrically equivalent cylinder created from an extruded circular sketch. Feature recognition: If the API of a CAD system does not permit a feature type to be recognized, features may sometimes be created by inferring their definitions from the geometry. Figure 28. The API of the originating CAD system doesn't permit the extraction of pattern parameters. Figure 29. Data conversion software infers a hole-pattern feature from the geometry. Feature decomposition:
Features that combine several simple features may be decomposed and recombined in accordance with the target system’s conventions. An example follows: 158