Re: Formula for Damping f times

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> Hi,
> This is a semi-trivial but I can't quite remember the answer, even
> though I've done it before.
> 
> I have an update function sort of like this..
> 
> void updateX( float deltaTime)
> {
>    x = x*k;
> }
> 
> k is a constant less than 1.0.
> 
> Now to do the damping properly I need to perform "x=x*k" deltaTime
> times, where deltaTime is a fraction.
> 
> Can anyone help with this please? I recall it just being a log or
> something.

We just do something very simple:

x *= 1.0f-(k*deltaTime);

So k = 1 = damped to zero velocity over 1 second at 30fps.

Cheers, Paul.
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