Class: Vector

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

Overview

Monkeypatch Vector to overcome some deficiencies

Direct Known Subclasses

Geometry::Point, Geometry::Size

Constant Summary collapse

X = 
Vector[1,0,0]
Y = 
Vector[0,1,0]
Z = 
Vector[0,0,1]

Instance Attribute Summary collapse

Unary operators collapse

Instance Method Summary collapse

Instance Attribute Details

#options ⇒ Object 



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# File 'lib/geometry/vector.rb', line 7

def options
	@options = {} if !@options
	@options
end

Instance Method Details

#+@ ⇒ Object 



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# File 'lib/geometry/vector.rb', line 17

def +@
	self
end

#-@ ⇒ Object 



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# File 'lib/geometry/vector.rb', line 21

def -@
	Vector[*(@elements.map {|e| -e })]
end

#cross(other) ⇒ Vector Also known as: **

Cross-product of two Vectors

Returns:



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# File 'lib/geometry/vector.rb', line 28

def cross(other)
	Vector.Raise ErrDimensionMismatch unless @elements.size == other.size
	
	case @elements.size
 when 0 then raise ArgumentError, "Can't multply zero-length Vectors"
 when 1 then @elements.first * other.first
 when 2 then @elements.first * other[1] - @elements.last * other.first
 when 3 then Vector[ @elements[1]*other[2] - @elements[2]*other[1],
@elements[2]*other[0] - @elements[0]*other[2],
@elements[0]*other[1] - @elements[1]*other[0]]
	end
end