[ODE] Realistic friction based on material.

[Mikhail Zoline]

Use GeomSetData (dGeomID, void *) and void *dGeomGetData (dGeomID) to 
set and get your materials.
In materials you can define mu, bounciness, bounce_vel, soft_erp,
soft_cfm, etc, etc. See the manual, contact joint section.
In nearCallback (void *data, dGeomID o1, dGeomID o2) you can get
the data associated with o1 and o2 and set your custom friction 
parameters before the creation of contacts.
MZ

Jose Marin wrote:
> Hi.
> 
> I would like to achieve a more "realistic" moviment of bodies, for example, a metal ball will roll faster in a stone ground than on a sand ground.
> 
> I would like that the interation between objects is based on their materials, not on a fixed value for all.
> 
> I think that I must check the material of each object evolved on the collision, and set the value of surface.mu, on the nearCallback function, right?
> 
> Is there any table with friction constants for most common materials?
> 
> And havint that, how I set the correct resulting value for surface.mu? Multiply? Sum?
> 
> 
> Also, the way of the materials behavior deppends of their material.
> 
> For example, if a metal ball falls on a stone ground, probably ti won't jump back, but if the ball is made of, say, plastic, it will jump several times.
> 
> How I set this behavior?
> Thanks for any tip!
> 
> 
> Jose
> 
> __________________________________________________
> Fale com seus amigos  de graça com o novo Yahoo! Messenger 
> http://br.messenger.yahoo.com/ 
> 
> _______________________________________________
> ODE mailing list
> ODE at ode.org
> http://ode.org/mailman/listinfo/ode
>