Support more opponents

[NaN]

fps is really low ! (around 4FPS with 4 cars on track)

Are you running the debug version? Depending on cars/track I can run with 8 cars with 20-10fps on a notebook(with shaders disabled due to intel gpu).

I'll test soon on powerful computer, but maybe we should think about optimisations of tracks, and LOD system for cars ?

That is a complex topic. One usually runs profilers to determine bottlenecks. Vdrift has some profiling capabilities itself. Run "vdrift -profiling".

From my impression we are rather low poly already compared to current racing game titles.

My earlier test suggested that we have too many small objects(for powerful graphics cards). But this might be preferable for weak gpus as small objects can be culled better(view distance). Would be interesting to see the performance with texture atlases and batched geometry. But that sounds like a lot of work.

PS: I can speed up the simulation a bit(maybe 15%) and maybe put it into a separate thread. But then I've noticed cases where the cpu is not fully utilized.