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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 Geomview::Viewer;
CREDIT geomview
Geomview is an interactive 3D viewing program, originally developed
at The Geometry Center, at the University of Minnesota.
http://www.geomview.org/
# path to the main geomview executable
custom $geomview;
CONFIGURE {
find_program($geomview, "geomview");
}
# @category Visualization
# Use [[wiki:external_software#geomview|geomview]], an alternative tool for the visualization
# of 3- or 4-dimensional geometrical objects.
label geomview
###########################################################################################
#
# Drawing methods for graphical primitives defined in this module
#
use Geomview;
sub point_appearance {
my $P=shift;
my $style=$P->VertexStyle;
( defined($style) && !is_code($style) && $style =~ $Visual::hidden_re
? () :
defined($P->VertexColor)
? (pointColors => $P->VertexColor) : (),
points => $P->Points,
dim => $P->Dim,
);
}
sub facet_appearance {
my $P=shift;
my $style=$P->FacetStyle;
if (defined($style) && !is_code($style) && $style =~ $Visual::hidden_re) {
( appearance => "-face +edge ".($P->Closed ? "" : " -backcull") );
} else {
my $transp=$P->FacetTransparency;
( defined($transp)
? is_code($transp)
? ( appearance => "face transparent -edge",
facetAlpha => $transp,
)
: ( appearance => "face transparent -edge material { alpha $transp }" )
: $P->Closed ? () : ( appearance => "-backcull" ),
defined($P->FacetColor)
? ( facetColors => $P->FacetColor) : ()
);
}
}
sub line_appearance {
my ($G)=@_;
my ($appearance, @params);
my $thickness=$G->EdgeThickness;
if (defined($thickness) && !is_code($thickness)) {
$appearance="linewidth $thickness";
}
if (defined (my $color=$G->EdgeColor)) {
if (is_code($color)) {
@params=( lineColors => $color );
} else {
$appearance.=" material { edgecolor " . $color->toFloat . " }";
}
}
push @params, ( appearance => $appearance ) if $appearance;
@params;
}
global_method geomview.geometry: draw(Visual::PointSet, @) {
my ($self, $P)=@_;
my $geom=new Geomview::OFF( name => $P->Name,
point_appearance($P),
facets => [ ],
);
$self->append($geom);
}
global_method geomview.geometry: draw(Visual::Polygon, @) {
my ($self, $P)=@_;
my $geom=new Geomview::OFF( name => $P->Name,
point_appearance($P),
facets => $P->Facets,
facet_appearance($P),
);
$self->append($geom);
}
global_method geomview.geometry: draw(Visual::Polygons, @) {
my ($self, $P)=@_;
my $geom=new Geomview::OFF( name => $P->Name,
point_appearance($P),
facets => $P->Facets,
facet_appearance($P),
);
$self->append($geom);
}
global_method geomview.graph: draw(Visual::WireBase, @) {
my ($self, $G)=@_;
my $geom=new Geomview::SKEL( name => $G->Name,
points => $G->Vertices,
dim => $G->Dim,
lines => $G->all_edges,
n_lines => $G->n_edges,
line_appearance($G),
);
$self->append($geom);
}
###########################################################################################
#
# Implementation of the Viewer interface
#
use BackgroundViewer;
use Polymake::Struct [ '@ISA' => 'Background::Viewer' ];
sub file_suffix { ".gcl" }
sub new {
my $self=&_new;
$self->graphics=new Geomview::File;
$self;
}
sub command {
my ($self, $filename)=@_;
"$geomview $filename";
}
sub new_drawing {
my ($self, $title)=@_;
push @{$self->graphics->geom}, new geom($title);
$self;
}
sub append {
my $self=shift;
$self->graphics->geom->[-1]->append(@_);
}
###########################################################################################
#
# Writes to a gcl file without starting a GUI
#
package Geomview::File::Writer;
import Visual::FileWriter(multiple => 1);
###########################################################################################
package application;
# @category Visualization
# Run [[wiki:external_software#geomview|geomview]] to display given visual objects.
#
# @param Visual::Object vis_obj ... objects to display
#
# @option String File "filename" or "AUTO"
# Store the objects in a ''gcl'' (geomview control language) file instead of starting the interactive GUI.
# The geometric data in ''OFF'' format is embedded in the Lisp-style commands, but can be easily extracted
# using any text editor, if needed.
#
# The ''.gcl'' 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 geomview(Visual::Object+, { File => undef }) {
visualize_explicit(@_, "Geomview");
}
# Local Variables:
# mode: perl
# cperl-indent-level:3
# End:
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