[ODE] Simulating a bobsleigh

[Jon Watte (ODE)]

Did you turn on dContactApprox1 for the contacts? If not, then "mu" is 
really a force limit, which is usually not what you want.

Also, I'm not sure that you want boxes, because those will have nasty 
behavior when running over rough terrain, along the edges. I'd probably 
use ccylinders, or possibly just a ray per skate, and doctor the 
contacts to use fDir, and have a high friction sideways, and low 
friction lengthways.

Cheers,

           / h+



David Ramos wrote:
> Hi,
>  
> I'm trying to setup a bobsleigh :
> a box for the chassis, and 4 hinged-boxes for the skates.
>  
> The problem is that this configuration makes the bob to behave a little 
> like an hovercraft. I don't have much control.
>  
> mu is set to a low value (0.0015f) to make the bob sliding but the 
> skates don't have
> any grip. Playing with slip values doesn't give me better results.
>  
> On the other side, setting mu to a higher friction asks me to add some 
> traction force simulated with hinge2 joints and spheres for the wheels. 
> So I end up with a car :) Not the result expected....
>  
> an hybrid approach with traction for the rear wheels and skates for the
> front wheels is not better...
>  
> Some ideas on how to model that kind of behavior ?
>  
> Thanks,
> David
> 
> 
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