#! /bin/sh
#
# draw maze solution
#
case "$#" in
 0) f="solve.out";;
 *) f="$1";;
esac

# maze data from stdin, solution data from $f

# exec 2>plot.stderr

(printf "set term gif\nset output\nunset border\nunset xtics\nunset ytics\n\
 plot '-' notitle with lines lc rgb 'black', '$f' notitle with lines lc rgb 'red'"; cat) |
 gnuplot