#  Copyright (c) 1997-2015
#  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.
#-------------------------------------------------------------------------------

package Postscript;

# for arrows in directed graphs and Gale diagrams
custom $arrowheadlength=14;

# for arrows in directed graphs and Gale diagrams
custom $arrowheadwidth=6;

# relative to arrowheadlength
custom $arrowheaddent=0.1;

# between the nodes of a face lattice (relative to the face label box width)
custom $face_spacing=0.2;

require PostscriptGraph;

package Postscript::Viewer;

# the trailing @ in the signature allows to draw several graphs
# together on the same page
global_method postscript.graph: draw(Visual::Graph, @) {
   my ($self, $Graph)=@_;
   $self->current_page->addGraph($Graph);
}

global_method postscript.lattice: draw(Visual::Lattice) {
   my ($self, $Lattice)=@_;
   $self->current_page->addLattice($Lattice);
}


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