centerOfPolygon

Introduction

Calculate the center of polygens with evenly distributed weight. In zuobiao.txt, coordinates of the polygon are sorted by a counterclockwise order. The first and the last coordinate are the same, which means the polygen is closed.

介绍

计算任意多边形重量均匀分布时的中心。zuobiao.txt里为逆时针按顺序的顶点坐标，第一个和最后一个坐标相同，表示多边形闭合。