Different surfaces?

[joevenzon]

I've noticed though, that there seems to be no way to figure out what sort of surface the wheel is on, apart from checking if its on a Bezier patch rather than a model. (The only other thing I can think of is finding the bump and resistance parameters from the track model?) This obviously makes it tricky to play a different sound for grass and gravel for example. Are there any plans to add another way of flagging these kind of changes, or have I missed something?

I've got issue 1 and issue 24 open which rely on a way to determine the driving surface. What I was thinking is, if it's a bezier patch, assume it's asphalt, otherwise if it's a collision with models, check the TRACK_OBJECT object to get the material type. Currently the TRACK_OBJECT doesn't have a material type, but this can be added by adding a flag for each track object in its list.txt file that defines the surface type (the listedit tool makes this easy enough). So, you are pretty much on the right track.