[ODE] rotating spheres (planets)

[Jon Watte (ODE)]

It is perfectly possible. Just track the body, and each frame, calculate 
and apply the appropriate force on all other bodies. In fact, if you 
want to, you could calculate and apply the mutual gravitation of all 
pairs of bodies; it'd be fairly simple to do.

However, most of the time, this is not what people want to simulate, so 
that's not what ODE does -- it would add an O(N^2) pass on bodies for 
each simulation loop, which is undesirable.

Cheers,

		/ h+


Vrej Melkonian wrote:
> I think in ODE, it's not possible to have a body act
> as a gravity source.
> The gravity in ODE is linear. You just give it a
> direction and ODE will apply a constant (non
> attenuating) force no matter where the object is.
> A planet would need to attract objects to it's center
> and ODE doesn't have this form of gravity.
> ODE is best suited for "local" simulations. Pretend
> the earth is flat :)
> 
> Vrej
> 
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around 
> http://mail.yahoo.com 
> _______________________________________________
> ODE mailing list
> ODE at q12.org
> http://q12.org/mailman/listinfo/ode
> 
>