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#!/usr/bin/perl -w
# Copyright 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Kevin Ryde
# This file is part of Math-PlanePath.
#
# Math-PlanePath 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 3, or (at your option) any later
# version.
#
# Math-PlanePath 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.
#
# You should have received a copy of the GNU General Public License along
# with Math-PlanePath. If not, see <http://www.gnu.org/licenses/>.
use 5.004;
use strict;
use Test;
plan tests => 21;
use lib 't';
use MyTestHelpers;
BEGIN { MyTestHelpers::nowarnings(); }
use Math::PlanePath::HypotOctant;
#------------------------------------------------------------------------------
# VERSION
{
my $want_version = 129;
ok ($Math::PlanePath::HypotOctant::VERSION, $want_version,
'VERSION variable');
ok (Math::PlanePath::HypotOctant->VERSION, $want_version,
'VERSION class method');
ok (eval { Math::PlanePath::HypotOctant->VERSION($want_version); 1 },
1,
"VERSION class check $want_version");
my $check_version = $want_version + 1000;
ok (! eval { Math::PlanePath::HypotOctant->VERSION($check_version); 1 },
1,
"VERSION class check $check_version");
my $path = Math::PlanePath::HypotOctant->new;
ok ($path->VERSION, $want_version, 'VERSION object method');
ok (eval { $path->VERSION($want_version); 1 },
1,
"VERSION object check $want_version");
ok (! eval { $path->VERSION($check_version); 1 },
1,
"VERSION object check $check_version");
}
#------------------------------------------------------------------------------
# n_start, x_negative, y_negative
{
my $path = Math::PlanePath::HypotOctant->new;
ok ($path->n_start, 1, 'n_start()');
ok ($path->x_negative, 0, 'x_negative() instance method');
ok ($path->y_negative, 0, 'y_negative() instance method');
ok ($path->class_x_negative, 0, 'class_x_negative()');
ok ($path->class_y_negative, 0, 'class_y_negative()');
ok ($path->x_minimum, 0, 'x_minimum()');
ok ($path->y_minimum, 0, 'y_minimum()');
ok ($path->sumxy_minimum, 0, 'sumxy_minimum()');
ok ($path->diffxy_minimum, 0, 'diffxy_minimum()');
}
{
my $path = Math::PlanePath::HypotOctant->new (points => 'odd');
ok ($path->x_minimum, 1, 'x_minimum()');
ok ($path->y_minimum, 0, 'y_minimum()');
ok ($path->sumxy_minimum, 1, 'sumxy_minimum()');
ok ($path->diffxy_minimum, 1, 'diffxy_minimum()');
}
{
my @pnames = map {$_->{'name'}}
Math::PlanePath::HypotOctant->parameter_info_list;
ok (join(',',@pnames), 'points');
}
#------------------------------------------------------------------------------
# increasing R^2
my @points_choices
= @{Math::PlanePath::HypotOctant->parameter_info_hash
->{'points'}->{'choices'}};
foreach my $points (@points_choices) {
my $path = Math::PlanePath::HypotOctant->new (points => $points);
my $prev_h = -1;
my $prev_x = 0;
my $prev_y = -1;
foreach my $n ($path->n_start .. 1000) {
my ($x, $y) = $path->n_to_xy ($n);
my $h = $x*$x + $y*$y;
if ($h < $prev_h) {
die "decreasing h=$h prev=$prev_h";
}
$prev_h = $h;
$prev_x = $x;
$prev_y = $y;
}
}
# if ($n > 2 && ! _turn_func_Left($prev_x,$prev_y, $x,$y)) {
# die "not turn left at n=$n xy=$x,$y prev=$prev_x,$prev_y";
# }
# sub _turn_func_Left {
# my ($dx,$dy, $next_dx,$next_dy) = @_;
# ### _turn_func_Left() ...
# my $a = $next_dy * $dx;
# my $b = $next_dx * $dy;
# return ($a > $b
# || $dx==-$next_dx && $dy==-$next_dy # straight opposite 180
# ? 1
# : 0);
# }
#------------------------------------------------------------------------------
exit 0;
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