An extension of manifold boundary representations to the r-sets
ACM Transactions on Graphics (TOG)
Interference detection among solids and surfaces
Communications of the ACM
Design of solids with free-form surfaces
SIGGRAPH '83 Proceedings of the 10th annual conference on Computer graphics and interactive techniques
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GEOMED is a system for doing 3-D geometric modeling; used from a keyboard, it is an interactive drawing program; used as a package of SAIL or LISP accessible subroutines, it is a graphics language. With GEOMED, arbitrary polyhedra can be constructed, moved about and viewed in perspective with hidden lines eliminated. In addition to polyhedra, camera and image models are provided so that simulators relevant to computer vision, problem solving, and animation may be constructed.