用于RoboCup仿真2D的球场使用，主要可以显示出具体的球员和球得参数，可以显示太多森多边形 -Stadium for the RoboCup Simulation 2D, mainly to show the players and the ball have parameters, can show too much Sen polygon

该文档中详细介绍了一种求解任意多边形重力异常的方法(In this document, a method for solving the gravity anomaly of a arbitrary polygon is introduced in detail.)