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Edge-based identification of DP-features on free-form solids
T Lim1, H Medellin, C Torres-Sanchez
1Scottish Manufacturing Institute, Heriot-Watt University, Department of Mechanical Engineering, Riccarton, Edinburgh, Scotland EH14 4AS. t.lim@hw.ac.uk
Abstract:
Numerous applications in mechanical CAD/CAM need robust algorithms for the identification of protrusion and depression features (DP-features) on geometric models with free-form (B-Spline) surfaces. This paper reports a partitioning algorithm that first identifies the boundary edges of DP-features and then creates a surface patch to cover the depressions or isolate the protrusions. The novelty of the method lies in the use of tangent continuity between edge segments to identify DP-feature boundaries that cross multiple faces and geometries.
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