这个源代码是用来实现图形之间的基本运算的，包括求交集、并集、差集等等。而且图形的形状也可以任意选择，可以是圆、线段、点、多边形等等。-the source code is used to achieve the basic graphics operations, including for intersection and set difference, and so on. The shape and graphics can ch

这个源代码是用来实现图形之间的基本运算的，包括求交集、并集、差集等等。而且图形的形状也可以任意选择，可以是圆、线段、点、多边形等等。-the source code is used to achieve the basic graphics operations, including for intersection and set difference, and so on. The shape and graphics can ch