Article ID Journal Published Year Pages File Type
414313 Computational Geometry 2008 17 Pages PDF
Abstract

We present an algorithm for approximating a given open polygonal curve with a minimum number of circular arcs. In computer-aided manufacturing environments, the paths of cutting tools are usually described with circular arcs and straight line segments. Greedy algorithms for approximating a polygonal curve with curves of higher order can be found in the literature. Without theoretical bounds it is difficult to say anything about the quality of these algorithms. We present an algorithm which finds a series of circular arcs that approximate the polygonal curve while remaining within a given tolerance region. This series contains the minimum number of arcs of any such series. Our algorithm takes O(n2logn) time for an original polygonal chain with n vertices. Using a similar approach, we design an algorithm with a runtime of O(n2logn), for computing a tangent-continuous approximation with the minimum number of biarcs, for a sequence of points with given tangent directions.

Related Topics
Physical Sciences and Engineering Computer Science Computational Theory and Mathematics