BEPUphysics

Aha! I knew it was something stupid on my part. You're right, I was using the non-dynamic constructor. Thanks for the help, both of you. That had me stuck for quite a while. Also, I wanted to say thanks for the awesome physics engine you made. It's definitely the most helpful XNA project I have ever...

...but I'm having trouble getting my entities to move at all. I have created a static triangle group out of the "playground" model, and I made a Box. I added both of those entities to the space, and set the space's gravity. I also have the space's update method getting called. However, whe...