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.
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。旺商聊官方下载对此有专业解读
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Екатерина Грищенко (старший редактор отдела «Бывший СССР»)
——“功成不必在我，功成必定有我”