Many three-dimensional objects consist of quasi-rigid pieces connected at articulable joints. The choice of a suitable three-dimensional representation for such objects, for example, the human body, is considered with respect to properties required during movement of the jointed segments. We discuss the coordinate systems involved, representation of the surface of the object, and maintenance of proper segment orientation during movement. Generalization to more complex forms is discussed. Disciplines Computer Engineering | Computer Sciences Comments University of Pennsylvania Department of Computer and Information Science Technical Report No. MSCIS-79-24. This technical report is available at ScholarlyCommons: http://repository.upenn.edu/cis_reports/1001 Representation of Articulable, Quasi-Rigid, Three-Dimensional Objects Norman I. Sadler Joseph O'Rourke April 1979 MS-CIS-79"""24 Computer and Information Science Department Moore School of Electrical Engineering University of Pennsylvania Philadelphia, PA 19104 0 resented at the NSF sponsored Workshop on Three-Dimensional Object RepresPntations University of Pennsylvania, April 1979
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