   Verlet terrain problem
  I've set up a verlet car with particles and stick constraints.  On a flat plane everything looks OK, the realism is acceptable for now.I recently tried the car on a terrain.  I'm not sure what causes it, but depending on the slope the car can strays to the left or right. It just doesn't look right.I you imaging a large bowl shape.  You drive from the centre up one of the sides.  Instead of reaching the top, the car would keep turning and do a compeate curcuit of the bowl.  Maybe I'll come up with a better description after ome sleep, but I  hope you get the idea. :)If anyone has experienced this before, could you give me a few pointers?  Or could someone shed some light on what the problem could be because I'm not sure how to proceed.Thanks[Edited by - fig on May 14, 2006 10:57:57 PM]
  I figured out that it was nothing to do with the verlet engine or collision response, like I had suspected. Before applying drive force to the wheels, I check to see if the wheels are colliding with something.  The problem was caused by checking the wheels individually.  So if only one wheel was touching the ground, it would cause an uneven force making the car turn instead of moving forward.  Duh!   ;  well, you might consider modeling a suspension system for your car...real ones have ways of making more than just one wheel contact the ground at once for a reason...   