Bullet is a 3d open source physics engine that supports rigid - and soft-body dynamics and collision detection in 3d.
Bullet是一个3d的开源物理引擎,支持3d的刚体和软体力学以及碰撞检测。
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But a cold hard physics fact is that something hurting though space at 18,000 miles a second could be torn up by a collision with the tiniest speck of dust imaginable.
The single electron detachment of negative ions in collision with atoms is known to be one of the most fundamental processes occurring in plasma physics, astrophysics, and ionospheric physics.