package Geometry::Primitive::Ellipse;
use Moose;
use MooseX::Storage;
use Math::Trig ':pi';
with qw(Geometry::Primitive::Shape MooseX::Clone MooseX::Storage::Deferred);
has 'height' => (
is => 'rw',
isa => 'Num',
default => 0
);
has 'origin' => (
is => 'rw',
isa => 'Geometry::Primitive::Point',
coerce => 1
);
has 'width' => (
is => 'rw',
isa => 'Num',
default => 0
);
sub area {
my ($self) = @_;
return (pi * $self->width * $self->height) / 4;
};
sub point_end {
my ($self) = @_;
return $self->point_start;
}
sub point_start {
my ($self) = @_;
return Geometry::Primitive::Point->new(
x => $self->origin->x,
y => $self->origin->y - ($self->height / 2)
);
}
sub scale {
my ($self, $amount) = @_;
return Geometry::Primitive::Ellipse->new(
height => $self->height * $amount,
width => $self->width * $amount
);
}
__PACKAGE__->meta->make_immutable;
no Moose;
1;
__END__
=head1 NAME
Geometry::Primitive::Ellipse - An Ellipse
=head1 DESCRIPTION
Geometry::Primitive::Ellipse represents an elliptical conic section.
=head1 SYNOPSIS
use Geometry::Primitive::Ellipse;
my $ellipse = Geometry::Primitive::Ellipse->new(
width => 15,
height => 10
);
print $ellipse->area;
=head1 ATTRIBUTES
=head2 height
Set/Get the height of this ellipse.
=head2 origin
Set/Get the origin of this ellipse.
=head2 width
Set/Get the width of this ellipse.
=head1 METHODS
=head2 new
Creates a new Geometry::Primitive::Ellipse
=head2 area
Returns the area of this ellipse.
=head2 point_end
Gets the "end" point for this Ellipse. Same as C.
=head2 point_start
Get the point that "starts" this Ellipse. Returns the a point where the X
coordinate is the Ellipse origin X and the origin Y + height / 2.
=head2 scale ($amount)
Returns a new ellipse whose radius is $amount times bigger than this one.
=head1 AUTHOR
Cory Watson
=head1 COPYRIGHT & LICENSE
You can redistribute and/or modify this code under the same terms as Perl
itself.