Class: Geometry::CenteredSquare

Inherits:
Square
  • Object
show all
Defined in:
lib/geometry/square.rb

Overview

A Square created with a center point and a size

Accessors collapse

Instance Attribute Summary collapse

Attributes inherited from Square

#options

Accessors collapse

Instance Method Summary collapse

Constructor Details

#initialize(center, size) ⇒ CenteredSquare

Returns a new instance of CenteredSquare.

Parameters:

  • center (Point) —

    The center point

  • size (Numeric) —

    The length of each side



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# File 'lib/geometry/square.rb', line 75

def initialize(center, size)
    @center = Point[center]
    @size = size
end

Instance Attribute Details

#center ⇒ Point (readonly)

Returns The center of the Square.

Returns:



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# File 'lib/geometry/square.rb', line 71

def center
  @center
end

#origin ⇒ Point (readonly)

Returns The lower left corner.

Returns:

  • (Point) —

    The lower left corner



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# File 'lib/geometry/square.rb', line 83

def origin
    Point[@center.x - size/2, @center.y - size/2]
end

#points ⇒ Array<Point> (readonly)

Returns The Square‘s four points (counterclockwise).

Returns:

  • (Array<Point>) —

    The Square‘s four points (counterclockwise)



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# File 'lib/geometry/square.rb', line 89

def points
    half_size = @size/2
    minx = @center.x - half_size
    maxx = @center.x + half_size
    miny = @center.y - half_size
    maxy = @center.y + half_size

    [Point[minx,miny], Point[maxx, miny], Point[maxx, maxy], Point[minx,maxy]]
end

Instance Method Details

#height ⇒ Object 



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# File 'lib/geometry/square.rb', line 99

def height
    @size
end

#width ⇒ Object 



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# File 'lib/geometry/square.rb', line 103

def width
    @size
end