Problems with collision checking

[joevenzon]

while you are doing collision detection, can you look at extending the collision box to include the wheels for open-wheel vehicles? that would make driving the F1 car so much more fun.

OK. As of R2396, collision boxes are now automatically generated based on the bounding box of the body model combined with the bounding boxes of the wheels, with the lowest position equal to the lowest body model position minus 20% of the body model height (to avoid scraping the bottom of the car on the road too easily).