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# Use the current selection to create a toroidal universe.
# Author: Andrew Trevorrow (andrew@trevorrow.com), Sept 2010.
from glife import inside, outside
import golly as g
selrect = g.getselrect()
if len(selrect) == 0: g.exit("There is no selection.")
x = selrect[0]
y = selrect[1]
wd = selrect[2]
ht = selrect[3]
selcells = g.getcells(selrect)
if not g.empty():
g.clear(inside)
g.clear(outside)
# get current rule, remove any existing suffix, then add new suffix
rule = g.getrule().split(":")[0]
g.setrule(rule + ":T" + str(wd) + "," + str(ht))
newx = -int(wd/2)
newy = -int(ht/2)
selrect[0] = newx
selrect[1] = newy
g.select(selrect)
if len(selcells) > 0: g.putcells(selcells, newx - x, newy - y)
g.fitsel()
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