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Gift wrapping algorithm
In computational geometry, the gift wrapping algorithm is an algorithm for computing the convex hull of a given set of points.
==Planar case==
In the two-dimensional case the algorithm is also known as Jarvis march, after R. A. Jarvis, who published it in 1973; it has O(''nh'') time complexity, where ''n'' is the number of points and ''h'' is the number of points on the convex hull. Its real-life performance compared with other convex hull algorithms is favorable when n is small or h is expected to be very small with respect to n. In general cases the algorithm is outperformed by many others.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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