projects / convert-color-husl.git / blame
| Commit | Line | Data |
|---|---|---|
| 1f72b051 MG |
1 | package Convert::Color::LCh; |
| 2 | ||
| 3 | use 5.014000; | |
| 4 | use strict; | |
| 5 | use warnings; | |
| 6 | use parent qw/Convert::Color/; | |
| 7 | ||
| 8 | our $VERSION = '0.001'; | |
| 9 | ||
| 10 | use Convert::Color::LUV; | |
| 11 | use Math::Trig ':pi'; | |
| 12 | ||
| 13 | __PACKAGE__->register_color_space('lch'); | |
| 14 | ||
| 15 | sub new { | |
| 16 | my ($class, $l, $c, $h) = @_; | |
| 17 | ($l, $c, $h) = split /,/s, $l unless defined $c; | |
| 18 | bless [$l, $c, $h], $class | |
| 19 | } | |
| 20 | ||
| 21 | sub L { shift->[0] } | |
| 22 | sub C { shift->[1] } | |
| 23 | sub h { shift->[2] } | |
| 24 | ||
| 25 | sub lch { @{$_[0]} } | |
| 26 | ||
| 27 | sub convert_to_luv { | |
| 28 | my ($self) = @_; | |
| 29 | my ($l, $c, $h) = @$self; | |
| 30 | my $hrad = $h / 180 * pi; | |
| 31 | my $u = $c * cos $hrad; | |
| 32 | my $v = $c * sin $hrad; | |
| 33 | Convert::Color::LUV->new($l, $u, $v) | |
| 34 | } | |
| 35 | ||
| 36 | sub new_from_luv { | |
| 37 | my ($class, $luv) = @_; | |
| 38 | my ($l, $u, $v) = @$luv; | |
| 39 | my $c = sqrt $u * $u + $v * $v; | |
| 00e063a5 | 40 | return $class->new($l, $c, 0) if $c < 0.00000001; |
| 1f72b051 MG |
41 | my $hrad = atan2 $v, $u; |
| 42 | my $h = $hrad * 180 / pi; | |
| 43 | $h += 360 if $h < 0; | |
| 44 | $class->new($l, $c, $h) | |
| 45 | } | |
| 46 | ||
| 47 | sub rgb { shift->convert_to_luv->rgb } | |
| 48 | sub new_rgb { shift->new_from_luv(Convert::Color::LUV->new_rgb(@_)) } | |
| 49 | ||
| 50 | 1; | |
| 51 | __END__ | |
| 52 | ||
| 53 | =encoding utf-8 | |
| 54 | ||
| 55 | =head1 NAME | |
| 56 | ||
| 57 | Convert::Color::LCh - a color value in the CIE LCh color space | |
| 58 | ||
| 59 | =head1 SYNOPSIS | |
| 60 | ||
| 61 | use Convert::Color::LCh; | |
| 62 | my $red = Convert::Color::LCh->new(53.23712, 179.03810, 12.17705); | |
| 63 | my $green = Convert::Color::LCh->new('87.73552,135.78953,127.71501'); | |
| 64 | ||
| 65 | use Convert::Color; | |
| 66 | my $blue = Convert::Color->new('lch:32.30087,130.68975,265.87432'); | |
| 67 | ||
| 68 | say $red->L; # 53.23712 | |
| 69 | say $red->C; # 179.03810 | |
| 70 | say $red->h; # 12.17705 | |
| 71 | say join ',', $blue->lch; # 32.30087,130.68975,265.87432 | |
| 72 | ||
| 73 | =head1 DESCRIPTION | |
| 74 | ||
| 75 | Objects of this class represent colors in the CIE LCh color space. | |
| 76 | ||
| 77 | Methods: | |
| 78 | ||
| 79 | =over | |
| 80 | ||
| 81 | =item Convert::Color::LCh->B<new>(I<$l>, I<$c>, I<$h>) | |
| 82 | ||
| 83 | Construct a color from its components. | |
| 84 | ||
| 85 | =item Convert::Color::LCh->B<new>(I<"$l,$c,$h">) | |
| 86 | ||
| 87 | Construct a color from a string. The string should contain the three | |
| 88 | components, separated by commas. | |
| 89 | ||
| 90 | =item $lch->B<L> | |
| 91 | ||
| 92 | =item $lch->B<C> | |
| 93 | ||
| 94 | =item $lch->B<h> | |
| 95 | ||
| 96 | Accessors for the three components of the color. | |
| 97 | ||
| 98 | =item $lch->B<lch> | |
| 99 | ||
| 100 | Returns the three components as a list. | |
| 101 | ||
| 102 | =back | |
| 103 | ||
| 104 | =head1 SEE ALSO | |
| 105 | ||
| 106 | L<Convert::Color> | |
| 107 | ||
| 108 | =head1 AUTHOR | |
| 109 | ||
| 110 | Marius Gavrilescu, E<lt>marius@ieval.roE<gt> | |
| 111 | ||
| 112 | =head1 COPYRIGHT AND LICENSE | |
| 113 | ||
| 114 | Copyright (C) 2015 by Marius Gavrilescu | |
| 115 | ||
| 116 | This library is free software; you can redistribute it and/or modify | |
| 117 | it under the same terms as Perl itself, either Perl version 5.20.2 or, | |
| 118 | at your option, any later version of Perl 5 you may have available. | |
| 119 | ||
| 120 | ||
| 121 | =cut |