Decreasing wheel friction with velocity

Question

I want to have my car wheels to have less sideways friction at higher speeds, how do i do this? this is the code i have so far... but it doesn't work.

var slip = 0.022 - (rigidbody.velocity.magnitude / 150);

BackRightWheel.WheelHit.sidewaysSlip = slip;

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Best Answer

Answer by spinaljack · Jul 14, 2010 at 05:50 PM

I'd change your code to:

var slip : float;

BackRightWheel.sidewaysFriction.stiffness = slip;

Also I'd clamp the slip value to make sure it never reaches 0 or some other minimum value.

To use math clamp you do this:

slip = Mathf.Clamp(slip,min,max)

or

slip = Mathf.Clamp(slip,0.001,0.022);

If you wanted a smooth curve instead of a linear line you can use this formula instead:

slip = 0.001 + 0.022/(rigidbody.velocity.magnitude+1)

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HolBol · Jul 14, 2010 at 08:00 PM 0

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Doesn' work... i get an error of : Assets/PlayerCar_Script.js(49,16): BCE0019: 'WheelHit' is not a member of 'UnityEngine.WheelCollider'.

spinaljack · Jul 14, 2010 at 09:09 PM 0

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That part's your code... Just delete that part

HolBol · Jul 14, 2010 at 09:12 PM 0

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AHHH so it is, woops.

HolBol · Jul 14, 2010 at 09:36 PM 0

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instead of this: var slip = 0.022 - (rigidbody.velocity.magnitude / 150);, is there a better way to reduce it, but not too far? cos this goes into minus numbers.

spinaljack · Jul 14, 2010 at 10:16 PM 0

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edited my answer

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Decreasing wheel friction with velocity

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