Class: Geometry::CenteredRectangle

Inherits:

Rectangle

• Object
• Rectangle
• Geometry::CenteredRectangle

Defined in:

lib/geometry/rectangle.rb

Instance Attribute Summary

• #center ⇒ Point

  The Rectangle‘s center.

• #size ⇒ Size

  The Size of the Rectangle.

Attributes inherited from Rectangle

#origin

Accessors

• #edges ⇒ Array<Edge>

  The Rectangle‘s four edges.

• #height ⇒ Object
• #max ⇒ Point

  The upper right corner of the bounding Rectangle.

• #min ⇒ Point

  The lower left corner of the bounding Rectangle.

• #points ⇒ Array<Point>

  The Rectangle‘s four points (clockwise).

• #width ⇒ Object

Instance Method Summary

• #eql?(other) ⇒ Boolean (also: #==)
• #initialize(*args) ⇒ CenteredRectangle constructor

  A new instance of CenteredRectangle.

Methods inherited from Rectangle

#bounds, #minmax, new

Methods included from ClusterFactory

included

Constructor Details

#new(width, height) ⇒ CenteredRectangle #new(size) ⇒ CenteredRectangle #new(center, size) ⇒ CenteredRectangle

Returns a new instance of CenteredRectangle.

Overloads:

• #new(width, height) ⇒ CenteredRectangle

  Creates a Rectangle of the given width and height, centered on the origin

  Parameters:

  • height (Number) —

    Height

  • width (Number) —

    Width

• #new(size) ⇒ CenteredRectangle

  Creates a Rectangle of the given Size centered on the origin

  Parameters:

  • size (Size) —

    Width and height

• #new(center, size) ⇒ CenteredRectangle

  Creates a Rectangle with the given center point and size

  Parameters:

  • center (Point)
  • size (Size)

# File 'lib/geometry/rectangle.rb', line 195

def initialize(*args)
    options, args = args.partition {|a| a.is_a? Hash}
    options = options.reduce({}, :merge)

    @center = options[:center] ? Point[options[:center]] : PointZero.new

    if options.has_key?(:size)
	@size = Geometry::Size[options[:size]]
    elsif options.has_key?(:height) and options.has_key?(:width)
	@size = Geometry::Size[options[:width], options[:height]]
    else
	raise ArgumentError, "Bad arguments to CenteredRectangle#new"
    end
end

Instance Attribute Details

#center ⇒ Point

Returns The Rectangle‘s center.

Returns:

• (Point) —

  The Rectangle‘s center

# File 'lib/geometry/rectangle.rb', line 178

def center
  @center
end

#size ⇒ Size

Returns The Size of the Rectangle.

Returns:

• (Size) —

  The Size of the Rectangle

# File 'lib/geometry/rectangle.rb', line 180

def size
  @size
end

Instance Method Details

#edges ⇒ Array<Edge>

Returns The Rectangle‘s four edges.

Returns:

• (Array<Edge>) —

  The Rectangle‘s four edges

# File 'lib/geometry/rectangle.rb', line 217

def edges
    point0 = @center - @size/2.0
    point2 = @center + @size/2.0
    point1 = Point[point0.x,point2.y]
    point3 = Point[point2.x, point0.y]
    [Edge.new(point0, point1),
    Edge.new(point1, point2),
    Edge.new(point2, point3),
    Edge.new(point3, point0)]
end

#eql?(other) ⇒ Boolean Also known as: ==

Returns:

• (Boolean)

# File 'lib/geometry/rectangle.rb', line 210

def eql?(other)
    (self.center == other.center) && (self.size == other.size)
end

#height ⇒ Object

# File 'lib/geometry/rectangle.rb', line 247

def height
    @size.height
end

#max ⇒ Point

Returns The upper right corner of the bounding Rectangle.

Returns:

• (Point) —

  The upper right corner of the bounding Rectangle

# File 'lib/geometry/rectangle.rb', line 229

def max
    @center + @size/2.0
end

#min ⇒ Point

Returns The lower left corner of the bounding Rectangle.

Returns:

• (Point) —

  The lower left corner of the bounding Rectangle

# File 'lib/geometry/rectangle.rb', line 234

def min
    @center - @size/2.0
end

#points ⇒ Array<Point>

Returns The Rectangle‘s four points (clockwise).

Returns:

• (Array<Point>) —

  The Rectangle‘s four points (clockwise)

# File 'lib/geometry/rectangle.rb', line 239

def points
    point0 = @center - @size/2.0
    point2 = @center + @size/2.0
    point1 = Point[point0.x,point2.y]
    point3 = Point[point2.x, point0.y]
    [point0, point1, point2, point3]
end

#width ⇒ Object

# File 'lib/geometry/rectangle.rb', line 251

def width
    @size.width
end