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Car creation with Stressed / Re: Stunts goes Dtm
« on: November 30, 2018, 09:28:09 PM »I got two cars with the same handling/length, but one twice as long as the other. The short one steers a lot faster, more responsive. I figure it's related to the reason longer cars jump farther: When a Stunts car turns it doesn't turn by a certain number of degrees per 0.05 seconds, it turns by a certain distance per 0.05 seconds. For a shorter car the front end moving the same distance means it turning a larger angle, so it steers more quickly.
Car length does have a major effect on responsiveness, and as you say it is indeed related to jump distances. If I remember correctly, it goes like this: the game calculates displacements for each of the four wheels, and then, roughly speaking, averages them to compute the overall position of the car. Steering is actually done by changing an angle, but that angle is the direction on which the front wheels are moving. For a longer car, the same change of direction of the front wheels has less of an effect on the car as a whole over a time step.
The handling parameter seems to be in control more of how long you can keep cornering before the car starts slipping. So they still counteract each other, if you corner slower but can keep it up longer you can corner sort of around the same distance at the same speed.
That is the right intuition. The handling/grip parameter tells you how hard you can steer (i.e. how large the steering angle of the front wheels can get) at a certain speed before skidding or losing control. I had found the exact formula for that, but I lost my notes about it in my HD crash in '16. In any case, longer cars require harder steering for changing the direction of the car at the same rate, so they can't take corners as fast.
All of the faster cars can do a single wide corner at around 150 miles an hour, despite their length or exact handling parameter.
Not quite. The limit speed of IMSA cars following the ideal line on large corners is slightly above 170mph; for the Indy, it is somewhere around 190mph. Such speeds are, as one might expect, very hard to attain without RH.
The sour spot theory is very interesting, and deserves further investigation. I feel it might also have something to do with steering responsiveness (i.e. how the car responds to steering input by the driver).
The BMW has a slightly lower max rpm than the other two with the same top gear ratio, yet I could not for the life of me get its real top speed (the highest of the tree) down just one or two mph, at the very least not without altering the air drag. I could give it slowdowns or lower its flat track top speed, but I think I could only lower that by 2 mph, not one. I think one of the things that's happening is that because the game works in discrete intervals of 0.05 seconds you don't actually touch every bar in the torque curve. You often end up skipping a bunch.
Besides that, the torque curve is made of segments which are 128RPM wide. If you set the redline at 8192RPM, there will be 40 segments; if the ratio of the top gear is set so that the real top speed is 200mph, the resolution of the real top speed will be 5mph per step, which is indeed quite coarse.
