mathematical model of vdrift cars

[portets]

It's a simple multiplier that gets set depending on what surface the car is driving on. A grass track surface could be set to 0.5 times friction, for example, which would cause the tire to only generate half the usual forces. It's not a very good way to model real off-road driving but it works well enough for when a car goes off the track accidentally.

does this mean that the code will need a little reworking to allow realistic off-road rally type events?

by realistic i mean gran turismo 1 or 2's rally realism. which isn't too realistic, but works