[page:Object3D] →
		[name]
		An 3D arrow Object.
		Example
		var dir = new THREE.Vector3( 1, 0, 0 );
		var origin = new THREE.Vector3( 0, 0, 0 );
		var length = 1;
		var hex = 0xffff00;
		var arrowHelper = new THREE.ArrowHelper( dir, origin, length, hex );
		scene.add( arrowHelper );
		
		Constructor
		[name]([page:Vector3 dir], [page:Vector3 origin], [page:Number length], [page:Number hex], [page:Number headLength], [page:Number headWidth] )
		
		dir -- Vector3 -- direction from origin. Must be a unit vector. 
		origin -- Vector3 
		length -- scalar 
		hex -- hexadecimal value to define color ex:0xffff00
		headLength -- The length of the head of the arrow
		headWidth -- The length of the width of the arrow
		
		
		This creates an arrow starting in origin in the direction dir for a certain length. It is also possible to change color.
		
		Properties
		[property:Line line]
		
		Contains the line part of the arrowHelper.
		
		[property:Mesh cone]
		
		Contains the cone part of the arrowHelper.
		
		Methods
		[method:null setColor]([page:Number hex])
		
		hex -- The hexadicmal value of the color
		
		
		Sets the color of the arrowHelper.
		
		[method:null setLength]([page:Number length], [page:Number headLength], [page:Number headWidth])
		
		length -- The desired length
		headLength -- The length of the head of the arrow
		headWidth -- The length of the width of the arrow
		
		
		Sets the length of the arrowhelper.
		
		[method:null setDirection]([page:Vector3 dir])
		
		dir -- The desired direction. Must be a unit vector.
		
		
		Sets the direction of the arrowhelper.
		
		Source
		[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]