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############################################################################
#
# File: sympmm.icn
#
# Subject: Program to produce pmm symmetry composite images
#
# Author: Ralph E. Griswold
#
# Date: February 4, 1995
#
############################################################################
#
# This file is in the public domain.
#
############################################################################
#
# This program reflects and concatenates images in the horizontal and
# vertical directions to produce composite images with the pmm ("prickly
# pear") plane symmetry. The resulting images tile seamlessly.
#
# The composite images are given the base name of the input images with
# "_pmm" appended.
#
# Warning: This program is slow.
#
############################################################################
#
# Requires: Version 9 graphics
#
############################################################################
#
# Links: basename, wopen, xformimg
#
############################################################################
link basename
link xformimg
link wopen
procedure main(args)
local name, base, win1, win2, win3, win4, win5
every name := !args do {
base := basename(name, ".gif")
win1 := WOpen("canvas=hidden", "image=" || name) | {
write(&errout, "*** cannot open ", name)
next
}
win2 := wreflect(win1, "v")
win3 := wcatenate(win1, win2, "h")
WClose(win1)
WClose(win2)
win4 := wreflect(win3, "h")
win5 := wcatenate(win3, win4, "v")
WClose(win3)
WClose(win4)
WriteImage(win5, base || "_pmm.gif")
WClose(win5)
}
end
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