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# 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;
# a postscript file viewer, e.g. ghostscript
custom $viewer;
CONFIGURE_OPT {
find_program($viewer, qw( gv evince kghostview ggv okular ghostview ), { prompt => "a PostScript viewer program" });
}
# @topic custom
# All numeric constants defined here are in postscript points (1/72")
# height of DIN A4 sheet
custom $Hpaper=841;
# width of DIN A4 sheet
custom $Wpaper=595;
# vertical margin
custom $Hmargin=50;
# horizontal margin
custom $Wmargin=30;
# text labels
custom $fontname="Times-Roman";
# text labels
custom $fontsize=10;
# for circles representing single geometric points
custom $point_radius=4;
# normal line width
custom $line_width=1;
# spacing between points (lines) and labels
custom $text_spacing=3;
use Postscript;
# @category Visualization
# Create a PostScript (tm) drawing and show it with your favorite viewer.
label postscript
###########################################################################################
#
# Basic class implementing the required back-end interface.
#
package Postscript::Viewer;
use BackgroundViewer;
use Polymake::Struct [ '@ISA' => 'Background::Viewer' ];
sub file_suffix { ".ps" }
sub new {
unless (defined $viewer) {
die <<'.';
no Postscript viewer configured: please specify the output File option
or call reconfigure("common::postscript.rules");
.
}
my $self=&_new;
$self->graphics=new Postscript::File;
$self;
}
sub command {
my ($self, $filename)=@_;
"$viewer $filename";
}
sub new_drawing {
my $self=shift;
$self->graphics->new_page(@_);
$self;
}
sub current_page {
shift->graphics->pages->[-1];
}
global_method postscript.geometry: draw(Visual::PointSet, @) {
my ($self, $P)=@_;
$self->current_page->addPointSet(new Postscript::PointSet($P));
}
global_method postscript.geometry: draw(Visual::Polygon, @) {
my ($self, $P)=@_;
$self->current_page->addPointSet(new Postscript::Polygon($P));
}
global_method postscript.geometry: draw(Visual::Polygons, @) {
my ($self, $P)=@_;
$self->current_page->addPointSet(new Postscript::Polygons($P));
}
###########################################################################################
#
# Writes a PS file without rendering
#
package Postscript::File::Writer;
import Visual::FileWriter(multiple => 1);
###########################################################################################
package application;
# @category Visualization
# Create a Postscript (tm) drawing with the given visual objects.
#
# @param Visual::Object vis_obj ... objects to draw
#
# @option String File "filename" or "AUTO"
# Store the drawing in a file without starting the viewer.
# The ''.ps'' suffix is automatically added to the file name.
#
# Specify //AUTO// if you want the filename be automatically derived
# from the drawing title.
#
# You can also use any expression allowed for the ''open'' function,
# including "-" for terminal output, "&HANDLE" for an already opened file handle,
# or "| program" for a pipe.
user_function postscript(Visual::Object+, { File => undef }) {
visualize_explicit(@_, "Postscript");
}
# Local Variables:
# mode: perl
# cperl-indent-level:3
# End:
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