【摘要】 由数学覆盖和物理网格形成的流形单元的积分区域可以有任意形状,其形状为物理网格和数学网格的相交部分,所以流形单元积分区域的形成为两个多边形(数学网格和物理网格)的求交运算。文章提出了以节点操作求解两多边形交集的方法和算法,对于实心任意多边形的任意相交方式,该方法是准确和通用的,且易于计算机程序的实现。更多还原

【Abstract】 The integral area’s shape can be arbitrary, its shape is the intersecting part of physical grid and mathematics grid, so, the generation of integral area of unit is an intersection operation of two polygons. This paper has offered a method and algorithm of polygon’s intersection, for the arbitrary way of intersecting of solid arbitrary polygon, this method is accurate and general, and is easy for realization by computer program.更多还原