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# Copyright (c) 1997-2020
# Ewgenij Gawrilow, Michael Joswig, and the polymake team
# Technische Universität Berlin, Germany
# https://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 Visual::Transformation;
use Polymake::Struct (
[ new => '$' ],
[ '$representative' => '#1' ], # an Object where to attach the transformation
);
my $att_name="ViewTransformation";
sub feedback {
my ($self, $cmd, $pipe, $viewer)=@_;
if ($cmd =~ s/^T\s+//) {
my $transf=$viewer->parse_transformation_matrix($cmd);
$self->representative->attach($att_name, $transf);
1
} else {
0
}
}
sub run {} # nothing happens
sub closed {} # ignore the event
sub get_transformation_matrix {
my ($self, $obj)=@_;
($obj // $self->representative)->get_attachment($att_name);
}
sub new_representative {
my ($self, $new_rep)=@_;
$new_rep->attach($att_name, $self->representative->get_attachment($att_name));
$self->representative=$new_rep;
}
1
# Local Variables:
# cperl-indent-level:3
# indent-tabs-mode:nil
# End:
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