虚拟环境中的基于AABB包围盒的碰撞检测-A virtual environment based on the AABB bounding box collision detection

C++类运用。几何体。 计算圆与圆外接矩形，矩形外接圆。圆外切三角形四个图形的面积。周长。对角线-C++ classes to use. Geometry. Calculated circle and the circle bounding rectangle, rectangle circle. Cut four triangles outside circle graph area. Circumference. Diagonal