btRayCastVehicle tips over very easily

[gc36]

Hello
I am having a hard time adjusting the friction for the btRayCastVehicle . Even at very low friction my car tips over very easily. Any tips?
thanks

[gleemer]

Try gravity at -17, and a mass >= 180 with a friction at 3.

[sparkprime]

With cars you have to balance the power with the traction otherwise you can roll it too easy. What I have done is set the power right for the vehicle, then reduced the traction until it stops tipping over, then reduced it a bit more. If the handling is rubbish (understeer/oversteer) you may need to lower the centre of mass.

[chucksspencer]

Try experimenting with the angular damping value for the chassis shape (use the setDamping method). Setting it higher (close to 1) might help.

[kenshin]

I have the same problem ,very helpfull

[chucksspencer]

Try experimenting with the angular damping value for the chassis shape (use the setDamping method). Setting it higher (close to 1) might help.

The more I mess with this the more I notice that setting the angular damping very high really screws with the steering - the friction-to-power ratio advice is almost certainly a better way to go.

[Erwin Coumans]

You should not use angular damping for this.

One improvement is shifting the center of mass/collision shape, using a btCompoundShape for the chassis. The child transform will shift the collision shape relative to the center of mass. We should provide some example how to do this.

Another improvement is to use the latest trunk of Bullet, and set the btWheelInfo::m_rollInfluence to a smaller value (0 = no roll, 1 = default).

Hope this helps,
Erwin