[name]
		2D vector.
		Example
		var a = new THREE.Vector2( 0, 1 );
		var b = new THREE.Vector2( 1, 0 );
		var d = a.distanceTo( b );
		
		Constructor
		[name]( [page:Float x], [page:Float y] )
		
		x -- [page:Float] representing the x value of the vector 
		y -- [page:Float] representing the y value of the vector
		
		
		A vector in 2 dimensional space
		
		Properties
		[property:Float x]
		[property:Float y]
		Methods
		[method:Vector2 set]( [page:Float x], [page:Float y] ) [page:Vector2 this]
		
		Sets value of this vector.
		
		[method:Vector2 copy]( [page:Vector2 v] ) [page:Vector2 this]
		
		Copies value of *v* to this vector.
		
		[method:Vector2 add]( [page:Vector2 v] ) [page:Vector2 this]
		
		Adds *v* to this vector.
		
		[method:Vector2 addVectors]( [page:Vector2 a], [page:Vector2 b] ) [page:Vector2 this]
		
		Sets this vector to *a + b*.
		
		[method:Vector2 addScaledVector]( [page:Vector2 v], [page:Float s] ) [page:Vector2 this]
		
		Adds the multiple of v and s to this vector.
		
		[method:Vector2 sub]( [page:Vector2 v] ) [page:Vector2 this]
		
		Subtracts *v* from this vector.
		
		[method:Vector2 subVectors]( [page:Vector2 a], [page:Vector2 b] ) [page:Vector2 this]
		
		Sets this vector to *a - b*.
		
		[method:Vector2 multiplyScalar]( [page:Float s] ) [page:Vector2 this]
		
		Multiplies this vector by scalar *s*.
		
		[method:Vector2 divideScalar]( [page:Float s] ) [page:Vector2 this]
		
		Divides this vector by scalar *s*.
		Set vector to *( 0, 0 )* if *s == 0*.
		
		[method:Vector2 negate]() [page:Vector2 this]
		
		Inverts this vector.
		
		[method:Float dot]( [page:Vector2 v] )
		
		Computes dot product of this vector and *v*.
		
		[method:Float lengthSq]()
		
		Computes squared length of this vector.
		
		[method:Float length]()
		
		Computes length of this vector.
		
		[method:Float lengthManhattan]()
		
		Computes Manhattan length of this vector.
		[link:http://en.wikipedia.org/wiki/Taxicab_geometry]
		
		[method:Vector2 normalize]() [page:Vector2 this]
		
		Normalizes this vector.
		
		[method:Float distanceTo]( [page:Vector2 v] )
		
		Computes distance of this vector to *v*.
		
		[method:Float distanceToSquared]( [page:Vector2 v] )
		
		Computes squared distance of this vector to *v*.
		
		[method:Vector2 setLength]( [page:Float l] ) [page:Vector2 this]
		
		Normalizes this vector and multiplies it by *l*.
		
		[method:Boolean equals]( [page:Vector2 v] )
		
		Checks for strict equality of this vector and *v*.
		
		[method:Vector2 clone]()
		
		Clones this vector.
		
		[method:Vector2 clamp]([page:Vector2 min], [page:Vector2 max]) [page:Vector2 this]
		
		min -- [page:Vector2] containing the min x and y values in the desired range 
		max -- [page:Vector2] containing the max x and y values in the desired range
		
		
		If this vector's x or y value is greater than the max vector's x or y value, it is replaced by the corresponding value. 
		If this vector's x or y value is less than the min vector's x or y value, it is replaced by the corresponding value.
		
		[method:Vector2 clampScalar]([page:Float min], [page:Float max]) [page:Vector2 this]
		
		min -- [page:Float] the minimum value the components will be clamped to 
		max -- [page:Float] the maximum value the components will be clamped to
		
		
		If this vector's x or y values are greater than the max value, they are replaced by the max value. 
		If this vector's x or y values are less than the min value, they are replaced by the min value.
		
		[method:Vector2 floor]()
		
		The components of the vector are rounded downwards (towards negative infinity) to an integer value.
		
		[method:Vector2 ceil]()
		
		The components of the vector are rounded upwards (towards positive infinity) to an integer value.
		
		[method:Vector2 round]()
		
		The components of the vector are rounded towards the nearest integer value.
		
		[method:Vector2 roundToZero]()
		
		The components of the vector are rounded towards zero (up if negative, down if positive) to an integer value.
		
		[method:Vector2 lerp]([page:Vector2 v], [page:Float alpha]) [page:Vector2 this]
		
		v -- [page:Vector2] 
		alpha -- [page:Float] between 0 and 1;
		
		
		Linear interpolation between this vector and v, where alpha is the percent along the line.
		
		[method:Vector2 lerpVectors]([page:Vector2 v1], [page:Vector2 v2], [page:Float alpha]) [page:Vector2 this]
		
		v1 -- [page:Vector2] 
		v2 -- [page:Vector2] 
		alpha -- [page:Float] between 0 and 1.
		
		
		Sets this vector to be the vector linearly interpolated between *v1* and *v2* with *alpha* factor.
		
		[method:undefined setComponent]([page:Integer index], [page:Float value])
		
		index -- 0 or 1 
		value -- [page:Float]
		
		
		if index equals 0 method replaces this.x with value. 
		if index equals 1 method replaces this.y with value.
		
		[method:Vector2 addScalar]([page:Float s]) [page:Vector2 this]
		
		s -- [page:Float]
		
		
		Add the scalar value s to this vector's x and y values.
		
		[method:Float getComponent]([page:Integer index])
		
		index -- 0 or 1
		
		
		if index equals 0 returns the x value. 
		if index equals 1 returns the y value.
		
		[method:Vector2 fromArray]([page:Array array]) [page:Vector2 this]
		
		array -- [page:Array] of length 2
		
		
		Sets this vector's x value to be array[0] and y value to be array[1].
		
		[method:Array toArray]( [page:Array array] )
		
		array -- Optional array to store the vector.
		
		
		Returns an array [x, y].
		
		[method:Vector2 min]([page:Vector2 v]) [page:Vector2 this]
		
		v -- [page:Vector2]
		
		
		If this vector's x or y value is greater than v's x or y value, replace that value with the corresponding min value.
		
		[method:Vector2 max]([page:Vector2 v]) [page:Vector2 this]
		
		v -- [page:Vector2]
		
		
		If this vector's x or y value is less than v's x or y value, replace that value with the corresponding max value.
		
		[method:Vector2 setX]([page:Float x]) [page:Vector2 this]
		
		x -- [page:Float]
		
		
		replace this vector's x value with x.
		
		[method:Vector2 setY]([page:Float y]) [page:Vector2 this]
		
		y -- [page:Float]
		
		
		replace this vector's y value with y.
		
		Source
		[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]