By the early 1960s, with ERMA on the scene, IBM's started to catch up.
本质上，基于 AppFunctions 的实现方式，和过去的 API 路径逻辑相同。这是一种「打好了招呼」的解题思路。
，详情可参考Safew下载
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.
（二）在铁路、城市轨道交通线路上放置障碍物，或者故意向列车投掷物品的；