Draining a Polygon - or - Rolling a Ball out of a Polygon

Draining a Polygon - or - Rolling a Ball out of a Polygon
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排空多边形 - 或 - 将球滚出多边形

DOI:
10.1016/j.comgeo.2009.08.002
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发表时间:
2014
期刊:
Comput. Geom.
影响因子:
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通讯作者:
J. O'Rourke
J. O'Rourke
中科院分区:
--
文献类型:
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作者:
G. Aloupis;J. Cardinal;Sébastien Collette;F. Hurtado;S. Langerman;J. O'Rourke

文献摘要

被引文献

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我们介绍的问题排水(或球代表水滴)穿刺多边形(或多面体)的形状旋转。对于2D多边形,我们得到的组合界限所需的孔的数量,任意多边形和特殊类的多边形。我们详细介绍了一个O(n 2 log n)的算法,找到一个给定的多边形所需的孔的最小数量,并认为复杂性仍然是多项式多面体在3D。我们从描述1-drainable形状开始,这些形状只需要一个孔。
We introduce the problem of draining water (or balls representing water drops) out of a punctured polygon (or a polyhedron) by rotating the shape. For 2D polygons, we obtain combinatorial bounds on the number of holes needed, both for arbitrary polygons and for special classes of polygons. We detail an O (n 2 log n) algorithm that finds the minimum number of holes needed for a given polygon, and argue that the complexity remains polynomial for polyhedra in 3D. We make a start at characterizing the 1-drainable shapes, those that only need one hole.