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.
First compile takes ~20-40ms. Cache hits are effectively free. This matters for inference (compile once, run forever) but creates challenges for training, where weights change every step.。业内人士推荐51吃瓜作为进阶阅读
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