Class: Geom2D::BoundingBox

Inherits:
Object
  • Object
show all
Defined in:
lib/geom2d/bounding_box.rb

Overview

Represents an axis aligned bounding box.

An empty bounding box contains just the point at origin.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(min_x = 0, min_y = 0, max_x = 0, max_y = 0) ⇒ BoundingBox

Creates a new BoundingBox.



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# File 'lib/geom2d/bounding_box.rb', line 31

def initialize(min_x = 0, min_y = 0, max_x = 0, max_y = 0)
  @min_x = min_x
  @min_y = min_y
  @max_x = max_x
  @max_y = max_y
end

Instance Attribute Details

#max_x ⇒ Object (readonly)

The maximum x-coordinate.



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# File 'lib/geom2d/bounding_box.rb', line 25

def max_x
  @max_x
end

#max_y ⇒ Object (readonly)

The maximum y-coordinate.



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# File 'lib/geom2d/bounding_box.rb', line 28

def max_y
  @max_y
end

#min_x ⇒ Object (readonly)

The minimum x-coordinate.



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# File 'lib/geom2d/bounding_box.rb', line 19

def min_x
  @min_x
end

#min_y ⇒ Object (readonly)

The minimum y-coordinate.



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# File 'lib/geom2d/bounding_box.rb', line 22

def min_y
  @min_y
end

Instance Method Details

#add(other) ⇒ Object Also known as: +

Returns a bounding box containing this bounding box and the argument.



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# File 'lib/geom2d/bounding_box.rb', line 68

def add(other)
  dup.add!(other)
end

#add!(other) ⇒ Object

Updates this bounding box to also contain the given bounding box or point.



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# File 'lib/geom2d/bounding_box.rb', line 39

def add!(other)
  case other
  when BoundingBox
    @min_x = [min_x, other.min_x].min
    @min_y = [min_y, other.min_y].min
    @max_x = [max_x, other.max_x].max
    @max_y = [max_y, other.max_y].max
  when Point
    @min_x = [min_x, other.x].min
    @min_y = [min_y, other.y].min
    @max_x = [max_x, other.x].max
    @max_y = [max_y, other.y].max
  else
    raise ArgumentError, "Can only use another BoundingBox or Point"
  end
  self
end

#height ⇒ Object

Returns the height of the bounding box.



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# File 'lib/geom2d/bounding_box.rb', line 63

def height
  @max_y - @min_y
end

#inspect ⇒ Object

:nodoc:



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# File 'lib/geom2d/bounding_box.rb', line 78

def inspect # :nodoc:
  "BBox[#{min_x}, #{min_y}, #{max_x}, #{max_y}]"
end

#to_a ⇒ Object

Returns the bounding box as an array of the form [min_x, min_y, max_x, max_y].



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# File 'lib/geom2d/bounding_box.rb', line 74

def to_a
  [@min_x, @min_y, @max_x, @max_y]
end

#width ⇒ Object

Returns the width of the bounding box.



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# File 'lib/geom2d/bounding_box.rb', line 58

def width
  @max_x - @min_x
end