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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「這些東西是我從來沒有經歷過，所以當時對我的心裡影響其實蠻大的，」關恆說，那些攻擊謾罵為他帶來的負面影響，加上沒有家人和朋友可以在身邊讓他傾訴，「所以我其實就是…我就不想再去面對這些事情，就是因為我當時已經是够焦頭爛額。」