Class: Geometry::Transformation::Composition

Inherits:
Object
  • Object
show all
Defined in:
lib/aurora-geometry/transformation/composition.rb

Instance Attribute Summary collapse

Accessors collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Composition

Returns a new instance of Composition.

Raises:

  • (TypeError) 


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# File 'lib/aurora-geometry/transformation/composition.rb', line 6

def initialize(*args)
		raise TypeError unless args.all? {|a| a.is_a? Transformation }
		@transformations = *args
end

Instance Attribute Details

#transformations ⇒ Object (readonly)

Returns the value of attribute transformations.



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# File 'lib/aurora-geometry/transformation/composition.rb', line 4

def transformations
  @transformations
end

Instance Method Details

#+(other) ⇒ Object 



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# File 'lib/aurora-geometry/transformation/composition.rb', line 11

def +(other)
		case other
 when Transformation
			Composition.new(*transformations, other)
 when Composition
			Composition.new(*transformations, *other.transformations)
		end
end

#has_rotation? ⇒ Boolean

!@attribute [r] has_rotation?

@return [Bool] true if the transformation has any rotation components

Returns:

  • (Boolean) 


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# File 'lib/aurora-geometry/transformation/composition.rb', line 23

def has_rotation?
		transformations.any? {|t| t.is_a?(Rotation) || t.has_rotation? }
end

#size ⇒ Object

!@attribute [r] size

@return [Number] the number of composed {Transformation}s



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# File 'lib/aurora-geometry/transformation/composition.rb', line 29

def size
		transformations.size
end

#transform(point) ⇒ Object 



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# File 'lib/aurora-geometry/transformation/composition.rb', line 34

def transform(point)
		transformations.reverse.reduce(point) {|point, transformation| transformation.transform(point) }
end