[ODE] air friction

[Sergey Kurdakov]

Hello Barbara,

> I now have a ball  on which I apply a force once (only once => no acceleration, constant speed)
> Then the ball starts rolling, but it never stops. How can I create the air friction effect? How can I stop the ball ?

the most streight way  seems  to just add 'damping' term -

add a negative moment to the ball which is proportional to it's speed of rotation

so apply ( add to other moments if the exist)  M = -koef * omega; where omega is a rotational velocity ( could be vector - so moment
will be vector as well)

Regards
Sergey Kurdakov

----- Original Message ----- 
From: <barbara.yersin at urbanet.ch>
To: <ode at q12.org>
Sent: Wednesday, April 21, 2004 1:58 PM
Subject: [ODE] air friction


> Hi guys!
> I now have a ball  on which I apply a force once (only once => no acceleration, constant speed)
> Then the ball starts rolling, but it never stops. How can I create the air friction effect? How can I stop the ball ?
>
> Thanks!
>
> Barbara
>
> _______________________________________________
> ODE mailing list
> ODE at q12.org
> http://q12.org/mailman/listinfo/ode
>