Abstract

A new algorithm for triangulating simple polygons is proposed. The algorithm uses a uniform space subdivision to speed-up the triangulation. The algorithm efficiently combines two approaches: an ear-cutting and a diagonal insertion. Comparison with the popular polygon triangulation algorithms (Sloan's ear-cutting algorithm, Seidel's randomized incremental algorithm, algorithm based on Graham scan, and Garey's et al. plane-sweep algorithm) for different classes of simple polygons (general, convex, monotone, star-shaped and the polygons taken from a GIS database) is presented. Different criteria are used for comparison: spent CPU time, quality of obtained triangulation and implementation effort. According to spent CPU time, the proposed algorithm is the most efficient among the tested algorithms for general polygons and polygons from a GIS database.

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