/usr/share/perl5/Circos/HSV.pm is in circos 0.69.6+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 | package Circos::HSV;
=pod
=head1 NAME
Circos::HSV - HSV to RGB conversion
=head1 SYNOPSIS
This module is not meant to be used directly.
=head1 DESCRIPTION
Circos is an application for the generation of publication-quality,
circularly composited renditions of genomic data and related
annotations.
Circos is particularly suited for visualizing alignments, conservation
and intra and inter-chromosomal relationships. However, Circos can be
used to plot any kind of 2D data in a circular layout - its use is not
limited to genomics. Circos' use of lines to relate position pairs
(ribbons add a thickness parameter to each end) is effective to
display relationships between objects or positions on one or more
scales.
All documentation is in the form of tutorials at L<http://www.circos.ca>.
=cut
# -------------------------------------------------------------------
use strict;
use warnings;
use base 'Exporter';
our @EXPORT = qw(
hsv_to_rgb
);
use Carp qw( carp confess croak );
use Digest::MD5 qw(md5_hex);
use Math::Round;
use Math::VecStat qw(min max);
use Math::Trig;
use lib "$FindBin::RealBin";
use lib "$FindBin::RealBin/../lib";
use lib "$FindBin::RealBin/lib";
use POSIX qw(floor);
use Circos::Constants;
use Circos::Debug;
use Circos::Error;
use Circos::Utils;
sub hsv_to_rgb {
my ($h, $s, $v, $a) = @_;
my @rgb;
$h = $h % 360 if $h < 0 || $h > 360;
# hue segment
$h /= 60;
my $i = POSIX::floor( $h );
my $f = $h - $i;
my $p = $v * ( 1 - $s );
my $q = $v * ( 1 - $s * $f );
my $t = $v * ( 1 - $s * ( 1 - $f ) );
if ($i == 0) {
@rgb = ($v,$t,$p);
} elsif ($i == 1) {
@rgb = ($q,$v,$p);
} elsif ($i == 2) {
@rgb = ($p,$v,$t);
} elsif ($i == 3) {
@rgb = ($p,$q,$v);
} elsif ($i == 4) {
@rgb = ($t,$p,$v);
} else {
@rgb = ($v,$p,$q);
}
push @rgb, $a if defined $a;
return @rgb;
}
1;
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