使用CGAL中自动生成骨架线函数，给二维平面多边形，自动添加屋顶结构，并进行可视化。效果与原理，参考博客：https://blog.csdn.net/qq_32867925/article/details/139023197?csdn_share_tail=%7B%22type%22%3A%22blog%22%2C%22rType%22%3A%22article%22%2C%22rId%22%3A%22139023197%22%2C%22source%22%3A%22qq_32867925%22%7D
