Zhirayuki: Sorry, I didn't spot your comment before. I've now uploaded the source so you can see for yourself, but essentially it works as follows. The vehicles are a fixed X width, so I always know the X coordinate of each wheel. I find the terrain height underneath each wheel and draw the two wheels. Then I connect the two wheels with a rectangle that is angled accordingly. It works quite well, although the vehicles "stretch" a little bit as they go up or down steep hills.

Ok, I've published the post this scenario refers to, go have a read: http://sinepost.wordpress.com/2012/02/16/theyve-got-atan-you-want-atan2/

This scenario is the example for a blog post I've written explaining the principle. I'll put a link up here once I've published it (either this week or next)

I probably need a better short name for it, but it's users who are close to you in terms of score. So if you are 18th, it will show something like 15th to 22nd positions.