implementing grid- based collision detection
...碰撞检测(Hit Testing with a Large Number of Objects) 实现基于网格的碰撞检测(Implementing grid- based collision detection) 编写网格代码(Coding the grid) ..
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implementing grid- based collision detection
实现基于网格的碰撞检测
以上为机器翻译结果，长、整句建议使用 人工翻译 。