OpenAI 与五角大楼的合作，核心争议在于 AI 技术的军事化边界。
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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expect is what most tools do anyway.
qualified, or under another name.