I need physics engine to simulate game world on server. I googled for .Net physics engines and they all were released in 2006-2009. So is there any good physics engine that I can use?
What I need from engine is box, spheres collisions..
Update: sorry forgot to mention i need 3d engine
Update: In case someone will need managed physics engine look at Jitter, it's pure managed and from the developer of JigLibX
I've used the very good Newton Game Dynamics via P/Invoke.
http://newtondynamics.com/forum/newton.php
There's also the well-regarded Bullet Physics engine, but I've never used it directly. It looks quite good, though.
http://sourceforge.net/projects/bullet/
You weren't clear if you needed a purely managed code engine, but note these are not.
2d Engine:
I had a look at this a little while ago: http://farseerphysics.codeplex.com/
-- Edit: for some reason I'm unable to delete this comment myself, or even reply to comments, so I leave this edit in here. This answer was posted before the clarification of the requirement for 3D. If a mod wants to delete this, feel free.
free or commercial ?
free: jitter, jiglibX, henge3D, bulletX
commercial: bepu physics, matali physics, digitalrune physics
I worked on one a few years back for a uni project
MIT License Written natively in C#
It has some limitations as you would guess for a uni project
eg only use convex hulls
Features collision detection (uses bounding volume hierarchy) elastic collisions custom collision handling also supports some particle physics and spatial queries (k-nearest neighbor).
its open source so if you wanted to add your own features to it you could
来源：https://stackoverflow.com/questions/4631505/suggestions-for-net-3d-physics-engine