Re: node swapping algorithm

Matthew Toseland <toad-EI5O+8PHWbJeeLb3ft/[email protected]> Tue, 15 Apr 2008 11:30:08 +0100

Newsgroups	gmane.network.freenet.technical
Message-ID	<[email protected]>

On Tuesday 15 April 2008 09:28, Michael Rogers wrote:
> Daniel Cheng wrote:
> >  750             if(Math.abs(friendLocs[i] - myLoc) <=
> > Double.MIN_VALUE*2) continue;
> 
> What's the purpose of this check and why does it use Math.abs instead of 
> Location.distance?

To prevent unjustified zeros when there is a race condition or other error 
causing there to be two nodes with the same location (e.g. when a swap ends 
up swapping with a direct peer).
> 
> Cheers,
> Michael

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