Goofy braking

[Spaz]

I love how the traffic system works, but have any of you figured out what settings to play with so that it doesn't look like your car has the hiccups any time it brakes for the car in front of it?  Do I need to add a bunch of mass to the back end?  Should I adjust the shocks?  Something else?

Here's an example.  Watch the red car in the back.

http://www.youtube.com/watch?v=Gb7dRTfW1UQ

[Ron]

I had good luck with applying the force at a slightly different location instead of the wheel location. You could probably do the same by lowering the center of mass too.

Code:

else if (handbrakePressed >= 0.9f && forwardPressed <= 0.1f)
{
if (backLeftOnGround)
{
collideBase.AddForce( mtx.ZAxis * leftSideForce, object.GetCurMatrix().Project( 0.6, 0.6, -1));
//if (frontLeftOnGround && frontRightOnGround)
//collideBase.AddForce( mtx.XAxis * turnForce * speed / 2000, object.GetCurMatrix().Project( 0.6, 1.0, -10));
}
if (backRightOnGround)
{
collideBase.AddForce( mtx.ZAxis * rightSideForce, object.GetCurMatrix().Project( -0.6, 0.6, -1));
//if (frontLeftOnGround && frontRightOnGround)
//collideBase.AddForce( mtx.XAxis * turnForce * speed / 2000, object.GetCurMatrix().Project( -0.6, 1.0, -10));
}
}

[Spaz]

Thanks, Ron.  I've been wanting the cars on the traffic system to look normal, though.  And for them I won't be pressing the handbrake.  I tried using your code where it looked like the regular braking would occur in the vehicle script, but it didn't seem to make much difference there.  What I finally found that seems to work pretty well was simply decreasing the BrakeEffectiveness variable in the OPR file quite a bit.  I thought I'd messed with that variable before and hadn't seen any difference, but it sure seems to do the trick.

[gekido]

you don't need to modify the script, or even any of the vehicle behaviors (controller settings) at all.

the trick is lowering the physics / collision body in your vehicle and potentially increasing the mass for it.