[ODE] Mushy Density?

[Chris Spencer]

Thanks, you're right. I was using an ERP of 0.8 and a CFM of 1e-5 and
decreasing the CFM to 1e-7 caused the dynamics to firm up
considerably.

Chris

On 6/12/07, Jon Watte (ODE) <hplus-ode at mindcontrol.org> wrote:
> Density has nothing to do with mushiness. Think of mercury or lead --
> very dense, very mushy.
>
> ODE models mushiness using CFM and ERP. Make the ERP high (0.9 or
> higher), and make the CFM very small (1e-4 or lower) for nice, crisp
> contacts. However, you'll need a smaller time step to make this work,
> and at some point, you really won't make it work in floating point at
> all, but should instead move over to double precision.
>
> Cheers,
>
>           / h+
>
>
> Chris Spencer wrote:
> > I've noticed that as the mass of objects increase, they tend to become
> > more "mushy" in the sense that colliding objects will penetrate each
> > other quite severely, even if both objects have very high densities.
> > Is there any way to counteract this effect while still using large
> > units?
> >
> > Regards,
> > Chris
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> >
>