雷军马年首场直播定档今晚，详解小米汽车安全体系
The tree is rebuilt every frame. For scenes of this scale, quadtree construction is fast enough to rebuild from scratch each frame, though larger simulations may benefit from incremental updates. Each particle queries its neighborhood for potential collisions, typically checking only 5 to 15 candidates instead of all 40. Red highlights indicate colliding pairs.，这一点在服务器推荐中也有详细论述
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Credit: GoCable
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