What XNA based 3D terrain and physics libraries exist? [closed]

Question

I'm planning on creating a game that contains a landscape with objects on it. The landscape will be defined using a heightfield, and the objects will move about on top of, and fly over the terrain. If you've ever played the old games Marble Madness and Virus/Zarch, that's the kind of complexity and style I'm trying to create.

I've seen various physics engines on the Internet, and a few tutorials about how to render heightfields as terrain, but they either lack documentation or seem overly complex for what I need.

All I need is a way to draw a heightfield, place 3D objects on it and then make them roll down the hills, or fly around in the sky. I don't mind making my own code to do this, so any relevant tutorials would be good too.

Answer 1

Here is a more complete list, Xbox, Zune and Windows...

• Farseer - 2d only.
• JigLibX
• Bullet 
  •  BulletX
  •  XBAP
• Oops! 3D Physics Framework
• Bepu physics
• Jello Physics
• Physics2D.Net

Windows Only...

• PhysX
  • MS Robotics Studio wrapper
  • PhysXdotNet Wrapper
• ODE (Open Dyamics Engine)
  • XPA (XNA Physics lib)
• Newton Game Dynamics
  • Newton Physics Port to XNA

Answer 2

If you're looking for more of a tutorial rather than a full-blown solution, have you checked the collision series at the XNA creators site?

Specifically, Collision Series 5: Heightmap Collision with Normals sounds like exactly what you're looking for.