几何是一个集合的例程几何计算在2，3和氮。

代码说明：

GEOMETRY is a collection of routines for geometric calculations in 2, 3 and N space. These calculations include angles, areas, containment, distances, intersection, nearest point, and volumes. The objects considered include points, lines, line segments, polygons, planes, polyhedra and vectors.-GEOMETRY is a collection of routines for geometric calculations in 2, 3 and N space. These calculations include angles, areas, containment, distances, intersection, nearest point, and volumes. The objects considered include points, lines, line segments, polygons, planes , polyhedra and vectors.