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# Copyright (c) 1997-2024
# 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.
#-------------------------------------------------------------------------------
# == SUMMARY ==
# - In Polytope:
# * replace AMBIENT_DIM by CONE_AMBIENT_DIM
# * replace DIM by CONE_DIM or COMBINATORIAL_DIM, depending on presence of geometric information
# - In PointConfiguration:
# * rename POLYTOPE_AMBIENT_DIM and POLYTOPE_DIM to AMBIENT_DIM and DIM resp.
# - In PolyhedralFan:
# * adjust values of COMBINATORIAL_DIM and MAXIMAL_CONES_DIMS, rename the latter to MAXIMAL_CONES_COMBINATORIAL_DIMS
# * rename AMBIENT_DIM and DIM to FAN_AMBIENT_DIM and FAN_DIM resp.
# - Move FACET_TRIANGULATIONS to BOUNDARY.FACET_TRIANGULATIONS in TRIANGULATION
# - In Polytope and PointConfiguration with WEIGHTS, either create a POLYTOPAL_SUBDIVISION or move weights into TRIANGULATION
upgrade 2.9.10 polytope::Polytope.AMBIENT_DIM | DIM {
my ($obj, $prop) = @_;
if (defined(my $dim = delete $obj->{AMBIENT_DIM})) {
$obj->{CONE_AMBIENT_DIM} = $dim+1;
}
if (defined(my $dim = delete $obj->{DIM})) {
my $new_prop_name = "COMBINATORIAL_DIM";
for (qw(POINTS VERTICES INEQUALITIES FACETS EQUATIONS AFFINE_HULL LINEALITY_SPACE)) {
if (defined($obj->{$_})) {
$new_prop_name = "CONE_DIM";
++$dim;
last;
}
}
$obj->{$new_prop_name} = $dim;
}
true
}
upgrade 2.9.11 polytope::PointConfiguration.POLYTOPE_AMBIENT_DIM = rename AMBIENT_DIM;
upgrade 2.9.11 polytope::PointConfiguration.POLYTOPE_DIM = rename DIM;
upgrade 2.9.12 fan::PolyhedralFan.COMBINATORIAL_DIM {
my ($obj, $prop) = @_;
if (defined($obj->{$prop})) {
$obj->{$prop} -= 1;
true
}
}
upgrade 2.9.12 fan::PolyhedralFan.MAXIMAL_CONES_DIMS {
my ($obj, $prop) = @_;
my $dims = delete $obj->{$prop};
if (defined($dims)) {
my $deduct = 1 + ($obj->{LINEALITY_DIM} // 0);
$_ -= $deduct for @$dims;
}
$obj->{MAXIMAL_CONES_COMBINATORIAL_DIMS} = $dims;
true
}
upgrade 2.9.13 polytope::Cone.TRIANGULATION.FACET_TRIANGULATIONS {
my ($obj, $prop) = @_;
$obj->{BOUNDARY}{$prop} = delete $obj->{$prop};
true
}
upgrade 2.9.13 polytope::PointConfiguration.TRIANGULATION.FACET_TRIANGULATIONS {
my ($obj, $prop) = @_;
$obj->{BOUNDARY}{$prop} = delete $obj->{$prop};
true
}
upgrade 2.9.14 fan::PolyhedralFan.DIM = rename FAN_DIM;
upgrade 2.9.14 fan::PolyhedralFan.AMBIENT_DIM = rename FAN_AMBIENT_DIM;
upgrade 2.9.14 topaz::SimplicialComplex.BALANCED = rename FOLDABLE;
upgrade 2.9.15 polytope::Polytope.POLYTOPAL_SUBDIVISION {
my ($obj, $prop) = @_;
create_subdivision($obj, delete $obj->{$prop});
}
upgrade 2.9.15 polytope::PointConfiguration.POLYTOPAL_SUBDIVISION {
my ($obj, $prop) = @_;
create_subdivision($obj, delete $obj->{$prop});
}
# upgrade rules are executed in the definition order,
# so that the next two rules will only be fired when there was no POLYTOPAL_SUBDIVISION
upgrade 2.9.15 polytope::Polytope.WEIGHTS = \&move_weights;
upgrade 2.9.15 polytope::PointConfiguration.WEIGHTS = \&move_weights;
sub create_subdivision {
my ($obj, $cells) = @_;
my %subdiv;
if (defined($cells)) {
$subdiv{MAXIMAL_CELLS} = $cells;
}
if (defined(my $splits = delete $obj->{SPLITS_IN_SUBDIVISION})) {
$subdiv{REFINED_SPLITS} = $splits;
}
if (defined(my $weights = delete $obj->{WEIGHTS})) {
$subdiv{WEIGHTS} = $weights;
}
delete $obj->{WEIGHTS_GENERIC};
$obj->{POLYTOPAL_SUBDIVISION} = \%subdiv;
push @{$obj->{_load}}, "fan";
true
}
sub move_weights {
my ($obj, $prop) = @_;
if (delete $obj->{WEIGHTS_GENERIC}) {
$obj->{TRIANGULATION}{$prop} = delete $obj->{$prop};
} else {
create_subdivision($obj);
}
}
# Local Variables:
# mode: perl
# cperl-indent-level: 3
# indent-tabs-mode:nil
# End:
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