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authors Trikac, S.N., Banerjeea, P. and Kashyapb, R.L.
year 1997
title Virtual reality interfaces for feature-based computer-aided design systems
source Computer-Aided Design, Vol. 29 (8) (1997) pp. 565-574
summary A computer-aided design (CAD) system with a virtual reality (VR) interface simplifies the design of complex mechanical parts. To add a design feature (e.g., a hole,slot, or protrusion), the designer can navigate in the part to the appropriate face of the part where he/she wishes to attach the feature, and sketch directly on that face.Besides convenience, this method of feature specification implicitly enforces feature accessibility constraints, and also provides hints to the process-planner regardingthe order in which the features may be manufactured. We detail the design of a VR-based prototype CAD system. The system maintains the knowledge of part cavitiesand their adjacencies, and a triangulated boundary-representation of an approximating polyhedron. We present incremental provably correct algorithms for updatingthis representation as the user edits the part. We also show how this representation supports real-time displays, navigation, and collision detection. The user-interfaceof the CAD system relies on these capabilities to provide the above-mentioned advantages.
keywords User Interfaces, Virtual Reality, Feature-Based Design, Geometric Reasoning, Feature Extraction
series journal paper
references Content-type: text/plain
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