[绘制点物件](GH%E7%BB%98%E5%88%B6%E7%82%B9%E7%89%A9%E4%BB%B6.md) [最近点分析](GH%E6%9C%80%E8%BF%91%E7%82%B9%E5%88%86%E6%9E%90.md) [线交集处理](GH%E7%BA%BF%E4%BA%A4%E9%9B%86%E5%A4%84%E7%90%86.md)