[ODE] Non-deterministic behavior

[Josh Welber]

Constant, Each update we call dWorldStep with time step of 0.032.

thoughts?

thanks

Josh




At 08:35 PM 8/24/2003 +0200, Flavien Brebion wrote:
>Are time steps constant or framerate dependant?
>
>F. Brebion
>
>
>-----Original Message-----
>From: ode-admin@q12.org [mailto:ode-admin@q12.org]On Behalf Of Josh
>Welber
>Sent: dimanche 24 aout 2003 16:17
>To: ode@q12.org
>Subject: [ODE] Non-deterministic behavior
>
>
>Does anyone have experience with ODE giving non-deterministic
>results?  What I mean is specifically this:  We have a simulation where you
>shoot a ball out over a terrain and it starts rolling from there.  The only
>user input is the direction/spin/force that the ball is launched with --
>and all these are set with discrete controls. The collisions in this case
>are all between spheres and triMesh.  We have found that the ball does not
>in a deterministic manner -- but rather bounces oddly sometimes, sometimes
>acts as expected.  This is sometimes worse if there is friction in the
>collision contact, but even for frictionless collisions it still reacts in
>a non-deterministic way.  Does anyone have any ideas about this one, seen
>this behavior themselves?  I saw the posting regarding friction causing
>unexpected results -- this is a different problem.
>
>thanks
>
>
>
>Josh Welber
>partner/tech wrangler
>Large Animal Games
>http://www.largeanimal.com
>t: 212.989.4312
>f: 305.489.5790
>
>
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Josh Welber
partner/tech wrangler
Large Animal Games
http://www.largeanimal.com
t: 212.989.4312
f: 305.489.5790