#  Copyright (c) 1997-2018
#  Ewgenij Gawrilow, Michael Joswig (Technische Universitaet Berlin, Germany)
#  http://www.polymake.org
#
#  This program is free software; you can redistribute it and/or modify it
#  under the terms of the GNU General Public License as published by the
#  Free Software Foundation; either version 2, or (at your option) any
#  later version: http://www.gnu.org/licenses/gpl.txt.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#-------------------------------------------------------------------------------

# script copied from FAQ
# usage: polymake --script print_face_lattice FILE.poly

use application 'polytope';

my $file=shift;
my $p=is_object($file) ? $file : load($file);
my $HD=$p->HASSE_DIAGRAM;
my $dim=$HD->dim;
for (my $d=0; $d<=$dim; ++$d) {
   print "DIM=$d\n";
   foreach my $n (@{$HD->nodes_of_dim($d)}) {
      print "$n: ", $HD->FACES->[$n], "\n";
   }
}

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