Class: AaBb

Inherits:
Object
  • Object
show all
Defined in:
lib/jruby_art/helpers/aabb.rb

Overview

Axis aligned bounding box class (AABB would clash with Toxicgem)

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(center:, extent:) ⇒ AaBb

Returns a new instance of AaBb.



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# File 'lib/jruby_art/helpers/aabb.rb', line 5

def initialize(center:, extent:)
  @center = center
  @extent = extent
end

Instance Attribute Details

#center ⇒ Object (readonly)

Returns the value of attribute center.



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# File 'lib/jruby_art/helpers/aabb.rb', line 3

def center
  @center
end

#extent ⇒ Object (readonly)

Returns the value of attribute extent.



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# File 'lib/jruby_art/helpers/aabb.rb', line 3

def extent
  @extent
end

Class Method Details

.from_min_max(min:, max:) ⇒ Object 



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# File 'lib/jruby_art/helpers/aabb.rb', line 10

def self.from_min_max(min:, max:)
  new(center: (min + max) * 0.5, extent: max - min)
end

Instance Method Details

#contains?(vec) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/jruby_art/helpers/aabb.rb', line 23

def contains?(vec)
  rad = extent * 0.5
  return false unless (center.x - rad.x..center.x + rad.x).cover? vec.x
  (center.y - rad.y..center.y + rad.y).cover? vec.y
end

#position(vec) ⇒ Object 



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# File 'lib/jruby_art/helpers/aabb.rb', line 14

def position(vec)
  return @center = vec unless block_given?
  @center = vec if yield
end

#scale(d) ⇒ Object 



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# File 'lib/jruby_art/helpers/aabb.rb', line 19

def scale(d)
  @extent *= d
end