[ODE] Combining contact surface parameters

[Marco Grubert]

Rubber (1.0) on ice (0.0) would still slide that's why I use the multiply
approach..

- Marco Grubert

----- Original Message ----- 
From: "Alex Rubinsteyn" <rubnstyn at uiuc.edu>
To: <ode at q12.org>
Sent: Monday, February 28, 2005 17:59
Subject: [ODE] Combining contact surface parameters


>I know this has come up on this list before, but I couldn't find any sort
>of
> definitive answer.
>
> When colliding two geoms with different contact surfaces parameters, what
> is
> the most realistic (in appearance) method of combining their surfaces?
>
> The suggestions I've seen were:
>
> 1) having a lookup table for all combinations of surfaces
> 2) averaging values (1st mu = 0.1, 2nd mu = 0.9, collision mu = 0.5)
> 3) multiplying values ( 1st mu = 0.1, 2nd mu = 0.9, collision mu = 0.09)
>
> The first is impossible for me, since I won't know what all the possible
> surfaces
> will be in advance.
> So between averaging and multiplying, what gives better results?
> Is there some other method? (taking the max/min for some parameters?)
>
> Thanks,
> Alex
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