"Joseph Garvin" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > Terry Reedy wrote: > >>Today I followed a link to an interesting Python application I have not >>seen mentioned here before: >>http://solipsis.netofpeers.net/wiki/HomePage/.
> I was looking at this earlier today because I was curious how they were > going to handle performance concerns (both due to Python and bandwidth). > I'm having trouble understanding all of the details -- what is the > significance of the use of a torus for the world space? Does this > somehow help in the computation of the convex hull? I can only guess alone with you, but it certainly makes the distance calculation needed to identify people in your local area, or a neighbor's local area, both simple and uniform (the usual Euclidean formula). In other words, a large torus make everyplace locally flat with normal orthogonal coordinates. On a sphere, you have problems near the poles. Several game worlds have had the same double-wraparound topography. Terry J. Reedy -- http://mail.python.org/mailman/listinfo/python-list
