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#!/usr/bin/perl -w
# Copyright 2011, 2012, 2013 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;
use lib 't';
use MyTestHelpers;
BEGIN { MyTestHelpers::nowarnings(); }
use Math::PlanePath::PixelRings;
my $test_count = (tests => 2)[1];
plan tests => $test_count;
if (! eval 'use Image::Base 1.09; 1') { # version 1.09 for ellipse fixes
MyTestHelpers::diag ('skip due to Image::Base 1.09 not available -- ',$@);
foreach (1 .. $test_count) {
skip ('due to no Image::Base 1.09', 1, 1);
}
exit 0;
}
# uncomment this to run the ### lines
#use Smart::Comments;
sub dump_coords {
my ($href) = @_;
my $x_min = 0;
my $y_min = 0;
foreach my $key (keys %$href) {
my ($x,$y) = split /,/, $key;
if ($x < $x_min) { $x_min = $x; }
if ($y < $y_min) { $y_min = $y; }
}
my @rows;
foreach my $key (keys %$href) {
my ($x,$y) = split /,/, $key;
$rows[$y-$y_min]->[$x-$x_min] = '*';
}
foreach my $row (reverse @rows) {
my $str = '';
if ($row) {
foreach my $char (@$row) {
if ($char) {
$str .= " $char";
} else {
$str .= " ";
}
}
}
MyTestHelpers::diag ($str);
}
}
my %image_coords;
my $offset = 100;
{
package MyImage;
use vars '@ISA';
@ISA = ('Image::Base');
sub new {
my $class = shift;
return bless {@_}, $class;
}
sub xy {
my ($self, $x, $y, $colour) = @_;
$x -= $offset;
$y -= $offset;
### image_coords: "$x,$y"
$image_coords{"$x,$y"} = 1;
}
}
#------------------------------------------------------------------------------
# _cumul_extend()
{
my $path = Math::PlanePath::PixelRings->new;
my $image = MyImage->new;
my $good = 1;
my $limit = 500;
foreach my $r (1 .. $limit) {
%image_coords = ();
$image->ellipse (-$r+$offset,-$r+$offset, $r+$offset,$r+$offset, 'white');
my $image_count = scalar(@{[keys %image_coords]});
Math::PlanePath::PixelRings::_cumul_extend($path);
my $got = $path->{'cumul'}->[$r+1];
my $want = $path->{'cumul'}->[$r] + $image_count;
if ($got != $want) {
$good = 0;
MyTestHelpers::diag ("_cumul_extend() r=$r wrong: want=$want got=$got");
}
}
ok ($good, 1, "_cumul_extend() to $limit");
}
#------------------------------------------------------------------------------
# coords
{
my $path = Math::PlanePath::PixelRings->new;
my $image = MyImage->new;
my $n = 1;
my $good = 1;
my $limit = 100;
foreach my $r (0 .. $limit) {
%image_coords = ();
$image->ellipse (-$r+$offset,-$r+$offset, $r+$offset,$r+$offset, 'white');
my $image_count = scalar(@{[keys %image_coords]});
### $image_count
### from n: $n
my %path_coords;
while ($image_count--) {
my ($x,$y) = $path->n_to_xy($n++);
# perl 5.6.0 through 5.6.2 ends up giving "-0" when stringizing (as of
# the code in PixelRings version 19), avoid that so the hash keys
# compare with "eq" successfully
$x = "$x";
$y = "$y";
if ($x eq '-0') { $x = '0'; }
if ($y eq '-0') { $y = '0'; }
### path_coords: "$x,$y"
$path_coords{"$x,$y"} = 1;
}
### %image_coords
### %path_coords
if (! eq_hash (\%path_coords, \%image_coords)) {
MyTestHelpers::diag ("Wrong coords at r=$r");
MyTestHelpers::diag ("image: ", join(',', sort keys %image_coords));
MyTestHelpers::diag ("path: ", join(',', sort keys %path_coords));
dump_coords (\%image_coords);
dump_coords (\%path_coords);
$good = 0;
}
}
ok ($good, 1, 'n_to_xy() compared to image->ellipse()');
}
sub eq_hash {
my ($x, $y) = @_;
foreach my $key (keys %$x) {
if (! exists $y->{$key}) {
return 0;
}
}
foreach my $key (keys %$y) {
if (! exists $x->{$key}) {
return 0;
}
}
return 1;
}
exit 0;
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