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#!/usr/bin/perl -w
# Copyright 2011, 2012, 2013, 2014 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 => 576;
use lib 't';
use MyTestHelpers;
BEGIN { MyTestHelpers::nowarnings(); }
# uncomment this to run the ### lines
#use Devel::Comments;
require Math::PlanePath::DragonMidpoint;
#------------------------------------------------------------------------------
# VERSION
{
my $want_version = 117;
ok ($Math::PlanePath::DragonMidpoint::VERSION, $want_version,
'VERSION variable');
ok (Math::PlanePath::DragonMidpoint->VERSION, $want_version,
'VERSION class method');
ok (eval { Math::PlanePath::DragonMidpoint->VERSION($want_version); 1 },
1,
"VERSION class check $want_version");
my $check_version = $want_version + 1000;
ok (! eval { Math::PlanePath::DragonMidpoint->VERSION($check_version); 1 },
1,
"VERSION class check $check_version");
my $path = Math::PlanePath::DragonMidpoint->new;
ok ($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");
}
#------------------------------------------------------------------------------
# xy_to_n() reversal
foreach my $arms (1 .. 4) {
my $path = Math::PlanePath::DragonMidpoint->new (arms => $arms);
for my $x (0 .. 5) {
for my $y (0 .. 5) {
my $n = $path->xy_to_n ($x,$y);
next if ! defined $n;
my ($nx,$ny) = $path->n_to_xy ($n);
ok ($nx, $x, "arms=$arms xy=$x,$y n=$n cf nxy=$nx,$ny");
ok ($ny, $y, "arms=$arms xy=$x,$y n=$n cf nxy=$nx,$ny");
}
}
}
#------------------------------------------------------------------------------
# n_start, x_negative, y_negative
{
my $path = Math::PlanePath::DragonMidpoint->new;
ok ($path->n_start, 0, 'n_start()');
ok ($path->x_negative, 1, 'x_negative()');
ok ($path->y_negative, 1, 'y_negative()');
}
{
my @pnames = map {$_->{'name'}}
Math::PlanePath::DragonMidpoint->parameter_info_list;
ok (join(',',@pnames), 'arms');
}
#------------------------------------------------------------------------------
# first few points
{
my @data = (
[ 0, 0,0 ],
[ 1, 1,0 ],
[ 2, 1,1 ],
[ 3, 1,2 ],
[ 4, 1,3 ],
[ 5, 0,3 ],
[ 6, -1,3 ],
[ 7, -1,4 ],
[ 8, -1,5 ],
[ 0.25, 0.25, 0 ],
[ 1.25, 1, 0.25 ],
[ 2.25, 1, 1.25 ],
[ 3.25, 1, 2.25 ],
[ 4.25, .75, 3 ],
);
my $path = Math::PlanePath::DragonMidpoint->new;
foreach my $elem (@data) {
my ($n, $x, $y) = @$elem;
{
# n_to_xy()
my ($got_x, $got_y) = $path->n_to_xy ($n);
if ($got_x == 0) { $got_x = 0 } # avoid "-0"
if ($got_y == 0) { $got_y = 0 }
ok ($got_x, $x, "n_to_xy() x at n=$n");
ok ($got_y, $y, "n_to_xy() y at n=$n");
}
if ($n==int($n)) {
# xy_to_n()
my $got_n = $path->xy_to_n ($x, $y);
ok ($got_n, $n, "xy_to_n() n at x=$x,y=$y");
}
{
$n = int($n);
my ($got_nlo, $got_nhi) = $path->rect_to_n_range (0,0, $x,$y);
ok ($got_nlo <= $n, 1, "rect_to_n_range() nlo=$got_nlo at n=$n,x=$x,y=$y");
ok ($got_nhi >= $n, 1, "rect_to_n_range() nhi=$got_nhi at n=$n,x=$x,y=$y");
}
}
}
#------------------------------------------------------------------------------
# random fracs
foreach my $arms (1 .. 4) {
my $path = Math::PlanePath::DragonMidpoint->new (arms => $arms);
for (1 .. 5) {
my $bits = int(rand(25)); # 0 to 25, inclusive
my $n = int(rand(2**$bits)) + 1; # 1 to 2^bits, inclusive
my ($x1,$y1) = $path->n_to_xy ($n);
my ($x2,$y2) = $path->n_to_xy ($n+$arms);
foreach my $frac (0.25, 0.5, 0.75) {
my $want_xf = $x1 + ($x2-$x1)*$frac;
my $want_yf = $y1 + ($y2-$y1)*$frac;
my $nf = $n + $frac;
my ($got_xf,$got_yf) = $path->n_to_xy ($nf);
ok ($got_xf, $want_xf, "n_to_xy($nf) arms=$arms frac $frac, x");
ok ($got_yf, $want_yf, "n_to_xy($nf) arms=$arms frac $frac, y");
}
}
}
#------------------------------------------------------------------------------
# random points
foreach my $arms (1 .. 4) {
my $path = Math::PlanePath::DragonMidpoint->new (arms => $arms);
for (1 .. 20) {
my $bits = int(rand(25)); # 0 to 25, inclusive
my $n = int(rand(2**$bits)) + 1; # 1 to 2^bits, inclusive
my ($x,$y) = $path->n_to_xy ($n);
my $rev_n = $path->xy_to_n ($x,$y);
if (! defined $rev_n) { $rev_n = 'undef'; }
ok ($rev_n, $n, "xy_to_n($x,$y) reverse to expect n=$n, got $rev_n");
my ($n_lo, $n_hi) = $path->rect_to_n_range ($x,$y, $x,$y);
ok ($n_lo <= $n, 1, "rect_to_n_range() reverse n=$n cf got n_lo=$n_lo");
ok ($n_hi >= $n, 1, "rect_to_n_range() reverse n=$n cf got n_hi=$n_hi");
}
}
exit 0;
|
