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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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就像智能手机之前融合掉了卡片机、随身听和 PDA 一样，现在的手机也还在不断融合外设配件的功能：抗反射涂层如此，防窥膜亦如此。
倪學仁指出，這次大火涉及多座大廈，情況更為複雜。個別單位狀況不同，亦無法僅稱樓宇已損毀，便可直接拆卸而不用處理後續程序。「假設你的汽車出事了，是想要total loss（全部損毀），但你也需要保險公司同意才行。」他估算，若政府統一回購業權，可以有助加快與保險公司的溝通。
BYOB (bring your own buffer) reads were designed to let developers reuse memory buffers when reading from streams, an important optimization intended for high-throughput scenarios. The idea is sound: instead of allocating new buffers for each chunk, you provide your own buffer and the stream fills it.