A simple method for calculating distance between a solid sphere and a constructive solid geometry ( CSG) so lid primitive ( including block, cone, cylinder, sphere, wedge and torus) is derived to support the collision detection algorithm. 从几何方法上介绍了一种支持干涉检测的计算球和包括长方体、锥体、柱体、楔和圆环在内的基本体素之间距离计算方法。