[ODE] Cross-platform woes

[Keith Johnston]

The simulation must be identical because this is a
game in which people construct machines and then
simulate them - the end result must be the same on
every machine, every platform.  Otherwise the same
solution will not work from one machine to another.

--- Geoff Carlton <gcarlton at iinet.net.au> wrote:

> Why do you need the simulation to be strictly
> identical?  Is it demos, 
> network etc? 
> 
> There are usually ways around this for both, namely
> to just send the 
> compressed position+orientation for bodies, rather
> than re-running the 
> simulation.
> 
> Geoff
> 
> 
> Keith Johnston wrote:
> 
> >Having finally conquered repeatability on the PC
> from
> >one simulation run to the next, I am now trying to
> >make simulations on the PC and Mac run
> *identically*. 
> >I have tried truncating the physical properties to
> 2
> >decimal places, but this has not solved the
> problem. 
> >The same initial conditions on a simulation on the
> PC
> >and the Mac still diverge.
> >
> >Perhaps the only solution is to give up on Visual
> C++
> >and use gcc on windows - that way at least I'd be
> >using the same compiler on both operating systems. 
> >Currently we are using Xcode on the Mac and Visual
> >Studio on windows.
> >
> >Has anyone ever gotten exactly the same simulation
> >results on both Mac and PC?  How did you do it?
> >
> >Thanks,
> >Keith
> >
> >
> >		
>
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> >
> 
> 



		
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