/usr/share/perl5/Geometry/Primitive/Line.pm is in libgeometry-primitive-perl 0.24-1.
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 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 | package Geometry::Primitive::Line;
use Moose;
use MooseX::Storage;
with qw(Geometry::Primitive::Shape MooseX::Clone MooseX::Storage::Deferred);
use overload ('""' => 'to_string');
use Geometry::Primitive::Point;
has 'start' => (
is => 'rw',
isa => 'Geometry::Primitive::Point',
required => 1,
coerce => 1
);
has 'end' => (
is => 'rw',
isa => 'Geometry::Primitive::Point',
required => 1,
coerce => 1
);
sub contains_point {
my ($self, $x, $y) = @_;
my $point;
if(!ref($x) && defined($y)) {
# This allows the user to pass in $x and $y as scalars, which
# easier sometimes.
$point = Geometry::Primitive::Point->new(x => $x, y => $y);
} else {
$point = $x;
}
my $expy = ($self->slope * $point->x) + $self->y_intercept;
return $expy == $point->y;
}
# Don't know how to do this atm.
sub scale { }
sub is_parallel {
my ($self, $line) = @_;
return $line->slope == $self->slope;
}
sub is_perpendicular {
my ($self, $line) = @_;
my $slope = $self->slope;
# Deal with horizontal and vertical lines
if(!defined($slope)) {
return $line->slope == 0;
}
if($slope == 0) {
return !defined($line->slope);
}
return $line->slope == (-1 / $self->slope);
}
sub length {
my ($self) = @_;
return sqrt(($self->end->x - $self->start->x) ** 2
+ ($self->end->y - $self->start->y) ** 2);
}
sub point_end {
my ($self) = @_; return $self->end;
}
sub point_start {
my ($self) = @_; return $self->start;
}
sub slope {
my ($self) = @_;
my $end = $self->end;
my $start = $self->start;
my $x = $end->x - $start->x;
my $y = $end->y - $start->y;
if($x == 0) {
return undef;
}
return $y / $x;
}
sub to_string {
my ($self) = @_;
return $self->start->to_string." - ".$self->end->to_string;
}
sub y_intercept {
my ($self) = @_;
return $self->start->y - ($self->slope * $self->start->x);
}
__PACKAGE__->meta->make_immutable;
no Moose;
1;
__END__
=head1 NAME
Geometry::Primitive::Line - A Line
=head1 DESCRIPTION
Geometry::Primitive::Line represents a straight curve defined by two points.
=head1 SYNOPSIS
use Geometry::Primitive::Line;
my $line = Geometry::Primitive::Line->new();
$line->start($point1);
$line->end($point2);
=head1 ATTRIBUTES
=head2 end
Set/Get the end point of the line.
=head2 start
Set/Get the start point of the line.
=head1 METHODS
=head2 new
Creates a new Geometry::Primitive::Line
=head2 contains_point
Returns true if the supplied point is 'on' the line. Accepts either a point
object or an x y pair.
=head2 grow
Does nothing, as I'm not sure how. Patches or hints welcome.
=head2 is_parallel ($other_line)
Returns true if the supplied line is parallel to this one.
=head2 is_perpendicular ($other_line)
Returns true if the supplied line is perpendicular to this one.
=head2 length
Get the length of the line.
=head2 point_end
Get the end point. Provided for Shape role.
=head2 point_start
Get the start point. Provided for Shape role.
=head2 scale
Does nothing at the moment.
=head2 slope
Get the slope of the line.
=head2 to_string
Guess!
=head2 y_intercept
Returns the Y intercept of this line.
=head1 AUTHOR
Cory Watson <gphat@cpan.org>
=head1 COPYRIGHT & LICENSE
You can redistribute and/or modify this code under the same terms as Perl
itself.
|