Computational geometry in C (2nd ed.)
Computational geometry in C (2nd ed.)
Mold Accessibility via Gauss Map Analysis
SMI '04 Proceedings of the Shape Modeling International 2004
Finding feasible mold parting directions using graphics hardware
Computer-Aided Design
Testing an axis of rotation for 3D workpiece draining
2009 SIAM/ACM Joint Conference on Geometric and Physical Modeling
A new global accessibility algorithm for a polyhedral model with convex polygonal facets
Computer-Aided Design
Visibility-based conformal cooling channel generation for rapid tooling
Computer-Aided Design
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Visibility has found wide applications in manufacturing operations planning and computer vision and graphics. The motivation of this paper is to accurately calculate visibility for objects whose surface is represented by polygonal facets. In this paper, the authors focus on determining non-visibility cones, which are the complementary sets of visibility. This is accomplished by determining sliding planes that comprise the boundaries of a non-visibility cone. The approach presented in this paper directly evaluates the boundaries of the non-visibility cone of an arbitrary convex planar polygon due to the visibility blocked by obstacle polygons. The method is capable of calculating visibility for convex polygons with any number of sides, not limited to triangular facetted models. Implementation is demonstrated in this paper for three to six sided polygonal models.