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A Sweep-Line Algorithm and Its Application to Spiral Pocketing  

EL-Midany, Tawfik T. (Prod. Eng. & Mechanical Design Dept. Mansoura University)
Elkeran, Ahmed (Prod. Eng. & Mechanical Design Dept. Mansoura University)
Tawfik, Hamdy (Technology Development Dept. Workers' University)
Publication Information
International Journal of CAD/CAM / v.2, no.1, 2002 , pp. 23-28 More about this Journal
Abstract
This paper presents an efficient line-offset algorithm for general polygonal shapes with islands. A developed sweep-line algorithm (SL) is introduced to find all self-intersection points accurately and quickly. The previous work is limited to handle polygons that having no line-segments in parallel to sweep-line directions. The proposed algorithm has been implemented in Visual C++ and applied to offset point sequence curves, which contain several islands.
Keywords
Monotone chain; sweep-line; self-intersection; spiral pocketing; line-offset;
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