How to use the node.three.js.Vector3 function in node

var EPS = 0.000001;
	var PIXELS_PER_ROUND = 1800;

	var rotateStart = new THREE.Vector2();
	var rotateEnd = new THREE.Vector2();
	var rotateDelta = new THREE.Vector2();

	var zoomStart = new THREE.Vector2();
	var zoomEnd = new THREE.Vector2();
	var zoomDelta = new THREE.Vector2();

	var phiDelta = 0;
	var thetaDelta = 0;
	var scale = 1;

	var lastPosition = new THREE.Vector3();

	var STATE = { NONE: -1, ROTATE: 0, ZOOM: 1, PAN: 2 };
	var state = STATE.NONE;

	// events

	var changeEvent = { type: 'change' };


	this.rotateLeft = function ( angle ) {

		if ( angle === undefined ) {

			angle = getAutoRotationAngle();

		}

var OrbitControls = function ( object, domElement ) {

	this.object = object;
	this.domElement = ( domElement !== undefined ) ? domElement : THREE.document;

	// API

	this.enabled = true;

	this.center = new THREE.Vector3();

	this.userZoom = true;
	this.userZoomSpeed = 1.0;

	this.userRotate = true;
	this.userRotateSpeed = 1.0;

	this.userPan = true;
	this.userPanSpeed = 2.0;

	this.autoRotate = false;
	this.autoRotateSpeed = 2.0; // 30 seconds per round when fps is 60

	this.minPolarAngle = 0; // radians
	this.maxPolarAngle = Math.PI; // radians

function onKeyDown( event ) {

		if ( scope.enabled === false ) return;
		if ( scope.userPan === false ) return;

		switch ( event.keyCode ) {

			case scope.keys.UP:
				scope.pan( new THREE.Vector3( 0, 1, 0 ) );
				break;
			case scope.keys.BOTTOM:
				scope.pan( new THREE.Vector3( 0, - 1, 0 ) );
				break;
			case scope.keys.LEFT:
				scope.pan( new THREE.Vector3( - 1, 0, 0 ) );
				break;
			case scope.keys.RIGHT:
				scope.pan( new THREE.Vector3( 1, 0, 0 ) );
				break;

			case scope.keys.ROTATE:
				state = STATE.ROTATE;
				break;
			case scope.keys.ZOOM:
				state = STATE.ZOOM;
				break;
			case scope.keys.PAN:
				state = STATE.PAN;

function onKeyDown( event ) {

		if ( scope.enabled === false ) return;
		if ( scope.userPan === false ) return;

		switch ( event.keyCode ) {

			case scope.keys.UP:
				scope.pan( new THREE.Vector3( 0, 1, 0 ) );
				break;
			case scope.keys.BOTTOM:
				scope.pan( new THREE.Vector3( 0, - 1, 0 ) );
				break;
			case scope.keys.LEFT:
				scope.pan( new THREE.Vector3( - 1, 0, 0 ) );
				break;
			case scope.keys.RIGHT:
				scope.pan( new THREE.Vector3( 1, 0, 0 ) );
				break;

			case scope.keys.ROTATE:
				state = STATE.ROTATE;
				break;
			case scope.keys.ZOOM:
				state = STATE.ZOOM;
				break;
			case scope.keys.PAN:
				state = STATE.PAN;
				break;

		}

scope.zoomIn();

			} else {

				scope.zoomOut();

			}

			zoomStart.copy( zoomEnd );

		} else if ( state === STATE.PAN ) {

			var movementX = event.movementX || event.mozMovementX || event.webkitMovementX || 0;
			var movementY = event.movementY || event.mozMovementY || event.webkitMovementY || 0;

			scope.pan( new THREE.Vector3( - movementX, movementY, 0 ) );

		}

	}

function onKeyDown( event ) {

		if ( scope.enabled === false ) return;
		if ( scope.userPan === false ) return;

		switch ( event.keyCode ) {

			case scope.keys.UP:
				scope.pan( new THREE.Vector3( 0, 1, 0 ) );
				break;
			case scope.keys.BOTTOM:
				scope.pan( new THREE.Vector3( 0, - 1, 0 ) );
				break;
			case scope.keys.LEFT:
				scope.pan( new THREE.Vector3( - 1, 0, 0 ) );
				break;
			case scope.keys.RIGHT:
				scope.pan( new THREE.Vector3( 1, 0, 0 ) );
				break;

			case scope.keys.ROTATE:
				state = STATE.ROTATE;
				break;
			case scope.keys.ZOOM:
				state = STATE.ZOOM;

if ( scope.enabled === false ) return;
		if ( scope.userPan === false ) return;

		switch ( event.keyCode ) {

			case scope.keys.UP:
				scope.pan( new THREE.Vector3( 0, 1, 0 ) );
				break;
			case scope.keys.BOTTOM:
				scope.pan( new THREE.Vector3( 0, - 1, 0 ) );
				break;
			case scope.keys.LEFT:
				scope.pan( new THREE.Vector3( - 1, 0, 0 ) );
				break;
			case scope.keys.RIGHT:
				scope.pan( new THREE.Vector3( 1, 0, 0 ) );
				break;

			case scope.keys.ROTATE:
				state = STATE.ROTATE;
				break;
			case scope.keys.ZOOM:
				state = STATE.ZOOM;
				break;
			case scope.keys.PAN:
				state = STATE.PAN;
				break;

		}

	}