From: Eugene Leitl (eugene.leitl@lrz.uni-muenchen.de)
Date: Tue May 11 1999 - 13:24:22 MDT
Anders Sandberg writes:
> No. But what was the issue here was the fact that the geometry of the
> underlying grid of the CA makes the physics in the CA nonisotropic -
> there are preferred directions where the speed of light is
> different. For example, in Game of Life information from an event at
> (0,0) at time zero will arrive to (100,100) at the same time as
> information from time zero events at all points (x,0) where 0<=x<=200.
> Clearly, this doesn't correspond well to our physics.
A number of cellular automata show isotropic wave
propagation. Artifacts of lattice anisotropy do not necessary
propagate to macro level. Otherwise, lattice type has a large
impact. Some things work in cubic primitive lattice, some need hcp.
'gene
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