Problem walking on terrain with tree collision

i have been working with the same problem for a long time , and i couldnt find answers in the fourums

look , i'm trying to control my character , i have set up all the newton world and the materials ,

i have a terrain ( mesh ) with a TreeCollision , and the character has a Ellipsoid ,

i have seem that when the character touchs the edges of the TreeCollision (subdivisions ) , the character start to rotate , so my character is always rotating in the terrain ,

i have tested runing over a Box collision , and it's works fine , becasuse it hasnt edges nearly , just in the end when the character fall , the character rotate , so, is in the edges that the problem happen .


was going on ????
any answers could be helpful

Tried setting the rotation friction higher (is there such a thing, or just normal friction...)?

What you need to do is add an UpVector constraint to your character like this:
new OgreNewt::BasicJoints::UpVector( mNewtonWorld, yourBodyHere, Ogre::Vector3::UNIT_Y );

That way, your character will always stand up straight. Hope that helps.

it stays up, but thats it. In that way especially if the body is elipsoid, the character will continue to rotate in a very weird way... I solved the rotation problem with a compound colision by helping the elipsoid stay up using 4 small spheres and removed the upVector..