Credit: Tina Rowden / HBO
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.。爱思助手下载最新版本是该领域的重要参考
arr[j + gap] = key;，详情可参考safew官方下载
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