package Geometry::Primitive::Circle;
use Moose;
use MooseX::Storage;
with qw(Geometry::Primitive::Shape MooseX::Clone MooseX::Storage::Deferred);
use Geometry::Primitive::Point;
use Math::Trig ':pi';
has 'origin' => (
is => 'rw',
isa => 'Geometry::Primitive::Point',
coerce => 1
);
has 'radius' => (
is => 'rw',
isa => 'Num',
default => 0
);
sub area {
my ($self) = @_;
return $self->radius**2 * pi;
};
sub circumference {
my ($self) = @_;
return $self->diameter * pi;
}
sub diameter {
my ($self) = @_;
return $self->radius * 2;
}
sub point_end {
my ($self) = @_;
return $self->point_start;
}
sub point_start {
my ($self) = @_;
return Geometry::Primitive::Point->new(
x => $self->origin->x,
y => $self->origin->y - ($self->radius / 2)
);
}
sub scale {
my ($self, $amount) = @_;
return Geometry::Primitive::Circle->new(
radius => $self->radius * $amount
);
}
__PACKAGE__->meta->make_immutable;
no Moose;
1;
__END__
=head1 NAME
Geometry::Primitive::Circle - A Circle
=head1 DESCRIPTION
Geometry::Primitive::Circle represents an ellipse with equal width and height.
=head1 SYNOPSIS
use Geometry::Primitive::Circle;
my $circle = Geometry::Primitive::Circle->new(
radius => 15
);
print $circle->diameter;
=head1 ATTRIBUTES
=head2 origin
Set/Get the origin of this circle.
=head2 radius
Set/Get the radius of this circle.
=head1 METHODS
=head2 new
Creates a new Geometry::Primitive::Circle
=head2 area
Returns the area of this circle.
=head2 circumference
Returns the circumference of this circle.
=head2 diameter
Returns the diameter of this circle
=head2 scale ($amount)
Returns a new circle whose radius is $amount times bigger than this one.
=head2 point_end
Set/Get the "end" point of this cicle. Calls C.
=head2 point_start
Set/Get the "start" point of this cicle. Returns the point at the circle's
origin X coordinate and the origin Y coordinate + radius / 2.
=head1 AUTHOR
Cory Watson
=head1 COPYRIGHT & LICENSE
You can redistribute and/or modify this code under the same terms as Perl
itself.