'ive seen this link http://www.youtube.com/watch?v=fv-Oq5oe8Nw&hd=1
and now I have some thing clear.. but is there a way to modify the collision properties? like for example a cilynder, a scale, a position, etc?
the barrell have the 0,0,0 on the bottom side, not on the center of the barrel..
If I set a trimesh, everything works fine, but if I select a cilynder, that I think is faster use instead a trimesh (I don't need a precision to require a trimesh collision for this object), but the offset is wrong, as you can see from the screen...
how can I solve this?
thanks in advance!