[ODE] More info about timeStep and framerate

Holger Urbanek holger.urbanek at dlr.de
Thu Oct 14 10:38:53 MST 2004


Am I right that you are concerned about your calculations needing longer 
than the WorldSteps will occur?
This however is irrelevant for you, as long as you don't want to get 
real-time behaviour.

You just call the worldStep-function whenever you want the wold to move 
one, and it will move on the time as specified by stepsize. (normally in 
seconds). However be careful to choose small stepsizes to keep 
simulation errors small.

Espacially as yo are trying to do RF-Learning, real time is very 
uninterresting for you -- you will for shure interested in 
much-faster-than real time ;-), as learning takes for ages.

However I'm also at the very beginning of learning ODE.

Neelam C wrote:

>Hi all, 
>
>Can anybody help me find more info about timeStep (of dWorldStep) and
>"framerate"? 
>
>My previous thread: "http://hook.org/pipermail/ode/2004-October/014189.html".
>
>I have convert the code to C++ as suggested by comments (of course using class
>seems much easier - thanx guys). And now I am about to begin the actual
>"simulation code", where my Doggy would actually walk using Vel and FMax. 
>
>But before I start writing that code I want to know more about the timeStep and
>framerate for reasons described below:
>
>My objective is to make the Doggy learn to walk using Reinforcement Learning.
>and there would be some calculations involved for each step (Doggy has to finish
>his step in time t), plus some evaluations after tsec secs.  
>
>Once again, Thank you in advance.
>
>Neelam 
>
>
>		
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