[ODE] reverse timestep?

[Jon Watte]

I don't think this is generally possible. When a body collides with more than one other body during a timestep, I don't see how it's generally possible to analytically know how much of the respective velocities/momentums came from where. That, and the floating point imprecision would kill you ;-)

Cheers,

			/ h+


-----Original Message-----
From: ode-bounces at q12.org [mailto:ode-bounces at q12.org]On Behalf Of Tyler
Streeter
Sent: Monday, May 03, 2004 8:15 AM
To: ode at q12.org
Subject: [ODE] reverse timestep?


Is it possible to run a simulation in reverse?  I was
wondering if I could run my simulation for a while,
then run it backwards from the end to the beginning.

I thought maybe you could simply reverse the direction
of all forces, torques, and velocities.  Would that
work, or is there a lot more to it?  If it were that
simple, it would be nice to add this functionality to
ODE and be able to just pass a negative timestep to
the solver and have it do this automatically.

Tyler Streeter


	
		
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