经典的SWIFT++碰撞检测源代码。使用于刚体间的碰撞检测。-Classic SWIFT++ Collision detection source code. Used in collision detection between rigid body.

苹果最新开发语言swift的官方介绍手册，swift完全兼容X-Code，是O-C的替代语言-Apple' s latest development language swift official brochure, swift fully compatible with X-Code, alternative language is OC