three.js/examples/js/controls/experimental/CameraControls.js

( function () {

	var CameraControls = function ( object, domElement ) {

		if ( domElement === undefined ) console.warn( 'THREE.CameraControls: The second parameter "domElement" is now mandatory.' );
		if ( domElement === document ) console.error( 'THREE.CameraControls: "document" should not be used as the target "domElement". Please use "renderer.domElement" instead.' );
		this.object = object;
		this.domElement = domElement; // Set to false to disable this control

		this.enabled = true; // "target" sets the location of focus, where the object orbits around

		this.target = new THREE.Vector3(); // Set to true to enable trackball behavior

		this.trackball = false; // How far you can dolly in and out ( PerspectiveCamera only )

		this.minDistance = 0;
		this.maxDistance = Infinity; // How far you can zoom in and out ( OrthographicCamera only )

		this.minZoom = 0;
		this.maxZoom = Infinity; // How far you can orbit vertically, upper and lower limits.
		// Range is 0 to Math.PI radians.

		this.minPolarAngle = 0; // radians

		this.maxPolarAngle = Math.PI; // radians
		// How far you can orbit horizontally, upper and lower limits.
		// If set, must be a sub-interval of the interval [ - Math.PI, Math.PI ].

		this.minAzimuthAngle = - Infinity; // radians

		this.maxAzimuthAngle = Infinity; // radians
		// Set to true to enable damping (inertia)
		// If damping is enabled, you must call controls.update() in your animation loop

		this.enableDamping = false;
		this.dampingFactor = 0.05; // This option enables dollying in and out; property named as "zoom" for backwards compatibility
		// Set to false to disable zooming

		this.enableZoom = true;
		this.zoomSpeed = 1.0; // Set to false to disable rotating

		this.enableRotate = true;
		this.rotateSpeed = 1.0; // Set to false to disable panning

		this.enablePan = true;
		this.panSpeed = 1.0;
		this.screenSpacePanning = false; // if true, pan in screen-space

		this.keyPanSpeed = 7.0; // pixels moved per arrow key push
		// Set to true to automatically rotate around the target
		// If auto-rotate is enabled, you must call controls.update() in your animation loop
		// auto-rotate is not supported for trackball behavior

		this.autoRotate = false;
		this.autoRotateSpeed = 2.0; // 30 seconds per round when fps is 60
		// Set to false to disable use of the keys

		this.enableKeys = true; // The four arrow keys

		this.keys = {
			LEFT: 37,
			UP: 38,
			RIGHT: 39,
			BOTTOM: 40
		}; // Mouse buttons

		this.mouseButtons = {
			LEFT: THREE.MOUSE.ROTATE,
			MIDDLE: THREE.MOUSE.DOLLY,
			RIGHT: THREE.MOUSE.PAN
		}; // Touch fingers

		this.touches = {
			ONE: THREE.TOUCH.ROTATE,
			TWO: THREE.TOUCH.DOLLY_PAN
		}; // for reset

		this.target0 = this.target.clone();
		this.position0 = this.object.position.clone();
		this.quaternion0 = this.object.quaternion.clone();
		this.zoom0 = this.object.zoom; //
		// public methods
		//

		this.getPolarAngle = function () {

			return spherical.phi;

		};

		this.getAzimuthalAngle = function () {

			return spherical.theta;

		};

		this.saveState = function () {

			scope.target0.copy( scope.target );
			scope.position0.copy( scope.object.position );
			scope.quaternion0.copy( scope.object.quaternion );
			scope.zoom0 = scope.object.zoom;

		};

		this.reset = function () {

			scope.target.copy( scope.target0 );
			scope.object.position.copy( scope.position0 );
			scope.object.quaternion.copy( scope.quaternion0 );
			scope.object.zoom = scope.zoom0;
			scope.object.updateProjectionMatrix();
			scope.dispatchEvent( changeEvent );
			scope.update();
			state = STATE.NONE;

		}; // this method is exposed, but perhaps it would be better if we can make it private...


		this.update = function () {

			var offset = new THREE.Vector3(); // so camera.up is the orbit axis

			var quat = new THREE.Quaternion().setFromUnitVectors( object.up, new THREE.Vector3( 0, 1, 0 ) );
			var quatInverse = quat.clone().invert();
			var lastPosition = new THREE.Vector3();
			var lastQuaternion = new THREE.Quaternion();
			var q = new THREE.Quaternion();
			var vec = new THREE.Vector3();
			return function update() {

				var position = scope.object.position;
				offset.copy( position ).sub( scope.target );

				if ( scope.trackball ) {

					// rotate around screen-space y-axis
					if ( sphericalDelta.theta ) {

						vec.set( 0, 1, 0 ).applyQuaternion( scope.object.quaternion );
						const factor = scope.enableDamping ? scope.dampingFactor : 1;
						q.setFromAxisAngle( vec, sphericalDelta.theta * factor );
						scope.object.quaternion.premultiply( q );
						offset.applyQuaternion( q );

					} // rotate around screen-space x-axis


					if ( sphericalDelta.phi ) {

						vec.set( 1, 0, 0 ).applyQuaternion( scope.object.quaternion );
						const factor = scope.enableDamping ? scope.dampingFactor : 1;
						q.setFromAxisAngle( vec, sphericalDelta.phi * factor );
						scope.object.quaternion.premultiply( q );
						offset.applyQuaternion( q );

					}

					offset.multiplyScalar( scale );
					offset.clampLength( scope.minDistance, scope.maxDistance );

				} else {

					// rotate offset to "y-axis-is-up" space
					offset.applyQuaternion( quat );

					if ( scope.autoRotate && state === STATE.NONE ) {

						rotateLeft( getAutoRotationAngle() );

					}

					spherical.setFromVector3( offset );

					if ( scope.enableDamping ) {

						spherical.theta += sphericalDelta.theta * scope.dampingFactor;
						spherical.phi += sphericalDelta.phi * scope.dampingFactor;

					} else {

						spherical.theta += sphericalDelta.theta;
						spherical.phi += sphericalDelta.phi;

					} // restrict theta to be between desired limits


					spherical.theta = Math.max( scope.minAzimuthAngle, Math.min( scope.maxAzimuthAngle, spherical.theta ) ); // restrict phi to be between desired limits

					spherical.phi = Math.max( scope.minPolarAngle, Math.min( scope.maxPolarAngle, spherical.phi ) );
					spherical.makeSafe();
					spherical.radius *= scale; // restrict radius to be between desired limits

					spherical.radius = Math.max( scope.minDistance, Math.min( scope.maxDistance, spherical.radius ) );
					offset.setFromSpherical( spherical ); // rotate offset back to "camera-up-vector-is-up" space

					offset.applyQuaternion( quatInverse );

				} // move target to panned location


				if ( scope.enableDamping === true ) {

					scope.target.addScaledVector( panOffset, scope.dampingFactor );

				} else {

					scope.target.add( panOffset );

				}

				position.copy( scope.target ).add( offset );

				if ( scope.trackball === false ) {

					scope.object.lookAt( scope.target );

				}

				if ( scope.enableDamping === true ) {

					sphericalDelta.theta *= 1 - scope.dampingFactor;
					sphericalDelta.phi *= 1 - scope.dampingFactor;
					panOffset.multiplyScalar( 1 - scope.dampingFactor );

				} else {

					sphericalDelta.set( 0, 0, 0 );
					panOffset.set( 0, 0, 0 );

				}

				scale = 1; // update condition is:
				// min(camera displacement, camera rotation in radians)^2 > EPS
				// using small-angle approximation cos(x/2) = 1 - x^2 / 8

				if ( zoomChanged || lastPosition.distanceToSquared( scope.object.position ) > EPS || 8 * ( 1 - lastQuaternion.dot( scope.object.quaternion ) ) > EPS ) {

					scope.dispatchEvent( changeEvent );
					lastPosition.copy( scope.object.position );
					lastQuaternion.copy( scope.object.quaternion );
					zoomChanged = false;
					return true;

				}

				return false;

			};

		}();

		this.dispose = function () {

			scope.domElement.removeEventListener( 'contextmenu', onContextMenu, false );
			scope.domElement.removeEventListener( 'mousedown', onMouseDown, false );
			scope.domElement.removeEventListener( 'wheel', onMouseWheel, false );
			scope.domElement.removeEventListener( 'touchstart', onTouchStart, false );
			scope.domElement.removeEventListener( 'touchend', onTouchEnd, false );
			scope.domElement.removeEventListener( 'touchmove', onTouchMove, false );
			document.removeEventListener( 'mousemove', onMouseMove, false );
			document.removeEventListener( 'mouseup', onMouseUp, false );
			scope.domElement.removeEventListener( 'keydown', onKeyDown, false ); //scope.dispatchEvent( { type: 'dispose' } ); // should this be added here?

		}; //
		// internals
		//


		var scope = this;
		var changeEvent = {
			type: 'change'
		};
		var startEvent = {
			type: 'start'
		};
		var endEvent = {
			type: 'end'
		};
		var STATE = {
			NONE: - 1,
			ROTATE: 0,
			DOLLY: 1,
			PAN: 2,
			TOUCH_ROTATE: 3,
			TOUCH_PAN: 4,
			TOUCH_DOLLY_PAN: 5,
			TOUCH_DOLLY_ROTATE: 6
		};
		var state = STATE.NONE;
		var EPS = 0.000001; // current position in spherical coordinates

		var spherical = new THREE.Spherical();
		var sphericalDelta = new THREE.Spherical();
		var scale = 1;
		var panOffset = new THREE.Vector3();
		var zoomChanged = false;
		var rotateStart = new THREE.Vector2();
		var rotateEnd = new THREE.Vector2();
		var rotateDelta = new THREE.Vector2();
		var panStart = new THREE.Vector2();
		var panEnd = new THREE.Vector2();
		var panDelta = new THREE.Vector2();
		var dollyStart = new THREE.Vector2();
		var dollyEnd = new THREE.Vector2();
		var dollyDelta = new THREE.Vector2();

		function getAutoRotationAngle() {

			return 2 * Math.PI / 60 / 60 * scope.autoRotateSpeed;

		}

		function getZoomScale() {

			return Math.pow( 0.95, scope.zoomSpeed );

		}

		function rotateLeft( angle ) {

			sphericalDelta.theta -= angle;

		}

		function rotateUp( angle ) {

			sphericalDelta.phi -= angle;

		}

		var panLeft = function () {

			var v = new THREE.Vector3();
			return function panLeft( distance, objectMatrix ) {

				v.setFromMatrixColumn( objectMatrix, 0 ); // get X column of objectMatrix

				v.multiplyScalar( - distance );
				panOffset.add( v );

			};

		}();

		var panUp = function () {

			var v = new THREE.Vector3();
			return function panUp( distance, objectMatrix ) {

				if ( scope.screenSpacePanning === true ) {

					v.setFromMatrixColumn( objectMatrix, 1 );

				} else {

					v.setFromMatrixColumn( objectMatrix, 0 );
					v.crossVectors( scope.object.up, v );

				}

				v.multiplyScalar( distance );
				panOffset.add( v );

			};

		}(); // deltaX and deltaY are in pixels; right and down are positive


		var pan = function () {

			var offset = new THREE.Vector3();
			return function pan( deltaX, deltaY ) {

				var element = scope.domElement;

				if ( scope.object.isPerspectiveCamera ) {

					// perspective
					var position = scope.object.position;
					offset.copy( position ).sub( scope.target );
					var targetDistance = offset.length(); // half of the fov is center to top of screen

					targetDistance *= Math.tan( scope.object.fov / 2 * Math.PI / 180.0 ); // we use only clientHeight here so aspect ratio does not distort speed

					panLeft( 2 * deltaX * targetDistance / element.clientHeight, scope.object.matrix );
					panUp( 2 * deltaY * targetDistance / element.clientHeight, scope.object.matrix );

				} else if ( scope.object.isOrthographicCamera ) {

					// orthographic
					panLeft( deltaX * ( scope.object.right - scope.object.left ) / scope.object.zoom / element.clientWidth, scope.object.matrix );
					panUp( deltaY * ( scope.object.top - scope.object.bottom ) / scope.object.zoom / element.clientHeight, scope.object.matrix );

				} else {

					// camera neither orthographic nor perspective
					console.warn( 'WARNING: CameraControls.js encountered an unknown camera type - pan disabled.' );
					scope.enablePan = false;

				}

			};

		}();

		function dollyIn( dollyScale ) {

			if ( scope.object.isPerspectiveCamera ) {

				scale /= dollyScale;

			} else if ( scope.object.isOrthographicCamera ) {

				scope.object.zoom = Math.max( scope.minZoom, Math.min( scope.maxZoom, scope.object.zoom * dollyScale ) );
				scope.object.updateProjectionMatrix();
				zoomChanged = true;

			} else {

				console.warn( 'WARNING: CameraControls.js encountered an unknown camera type - dolly/zoom disabled.' );
				scope.enableZoom = false;

			}

		}

		function dollyOut( dollyScale ) {

			if ( scope.object.isPerspectiveCamera ) {

				scale *= dollyScale;

			} else if ( scope.object.isOrthographicCamera ) {

				scope.object.zoom = Math.max( scope.minZoom, Math.min( scope.maxZoom, scope.object.zoom / dollyScale ) );
				scope.object.updateProjectionMatrix();
				zoomChanged = true;

			} else {

				console.warn( 'WARNING: CameraControls.js encountered an unknown camera type - dolly/zoom disabled.' );
				scope.enableZoom = false;

			}

		} //
		// event callbacks - update the object state
		//


		function handleMouseDownRotate( event ) {

			rotateStart.set( event.clientX, event.clientY );

		}

		function handleMouseDownDolly( event ) {

			dollyStart.set( event.clientX, event.clientY );

		}

		function handleMouseDownPan( event ) {

			panStart.set( event.clientX, event.clientY );

		}

		function handleMouseMoveRotate( event ) {

			rotateEnd.set( event.clientX, event.clientY );
			rotateDelta.subVectors( rotateEnd, rotateStart ).multiplyScalar( scope.rotateSpeed );
			var element = scope.domElement;
			rotateLeft( 2 * Math.PI * rotateDelta.x / element.clientHeight ); // yes, height

			rotateUp( 2 * Math.PI * rotateDelta.y / element.clientHeight );
			rotateStart.copy( rotateEnd );
			scope.update();

		}

		function handleMouseMoveDolly( event ) {

			dollyEnd.set( event.clientX, event.clientY );
			dollyDelta.subVectors( dollyEnd, dollyStart );

			if ( dollyDelta.y > 0 ) {

				dollyIn( getZoomScale() );

			} else if ( dollyDelta.y < 0 ) {

				dollyOut( getZoomScale() );

			}

			dollyStart.copy( dollyEnd );
			scope.update();

		}

		function handleMouseMovePan( event ) {

			panEnd.set( event.clientX, event.clientY );
			panDelta.subVectors( panEnd, panStart ).multiplyScalar( scope.panSpeed );
			pan( panDelta.x, panDelta.y );
			panStart.copy( panEnd );
			scope.update();

		}

		function
		/*event*/
		handleMouseUp() { // no-op
		}

		function handleMouseWheel( event ) {

			if ( event.deltaY < 0 ) {

				dollyOut( getZoomScale() );

			} else if ( event.deltaY > 0 ) {

				dollyIn( getZoomScale() );

			}

			scope.update();

		}

		function handleKeyDown( event ) {

			var needsUpdate = false;

			switch ( event.keyCode ) {

				case scope.keys.UP:
					pan( 0, scope.keyPanSpeed );
					needsUpdate = true;
					break;

				case scope.keys.BOTTOM:
					pan( 0, - scope.keyPanSpeed );
					needsUpdate = true;
					break;

				case scope.keys.LEFT:
					pan( scope.keyPanSpeed, 0 );
					needsUpdate = true;
					break;

				case scope.keys.RIGHT:
					pan( - scope.keyPanSpeed, 0 );
					needsUpdate = true;
					break;

			}

			if ( needsUpdate ) {

				// prevent the browser from scrolling on cursor keys
				event.preventDefault();
				scope.update();

			}

		}

		function handleTouchStartRotate( event ) {

			if ( event.touches.length == 1 ) {

				rotateStart.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );

			} else {

				var x = 0.5 * ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX );
				var y = 0.5 * ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY );
				rotateStart.set( x, y );

			}

		}

		function handleTouchStartPan( event ) {

			if ( event.touches.length == 1 ) {

				panStart.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );

			} else {

				var x = 0.5 * ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX );
				var y = 0.5 * ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY );
				panStart.set( x, y );

			}

		}

		function handleTouchStartDolly( event ) {

			var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX;
			var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY;
			var distance = Math.sqrt( dx * dx + dy * dy );
			dollyStart.set( 0, distance );

		}

		function handleTouchStartDollyPan( event ) {

			if ( scope.enableZoom ) handleTouchStartDolly( event );
			if ( scope.enablePan ) handleTouchStartPan( event );

		}

		function handleTouchStartDollyRotate( event ) {

			if ( scope.enableZoom ) handleTouchStartDolly( event );
			if ( scope.enableRotate ) handleTouchStartRotate( event );

		}

		function handleTouchMoveRotate( event ) {

			if ( event.touches.length == 1 ) {

				rotateEnd.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );

			} else {

				var x = 0.5 * ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX );
				var y = 0.5 * ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY );
				rotateEnd.set( x, y );

			}

			rotateDelta.subVectors( rotateEnd, rotateStart ).multiplyScalar( scope.rotateSpeed );
			var element = scope.domElement;
			rotateLeft( 2 * Math.PI * rotateDelta.x / element.clientHeight ); // yes, height

			rotateUp( 2 * Math.PI * rotateDelta.y / element.clientHeight );
			rotateStart.copy( rotateEnd );

		}

		function handleTouchMovePan( event ) {

			if ( event.touches.length == 1 ) {

				panEnd.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );

			} else {

				var x = 0.5 * ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX );
				var y = 0.5 * ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY );
				panEnd.set( x, y );

			}

			panDelta.subVectors( panEnd, panStart ).multiplyScalar( scope.panSpeed );
			pan( panDelta.x, panDelta.y );
			panStart.copy( panEnd );

		}

		function handleTouchMoveDolly( event ) {

			var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX;
			var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY;
			var distance = Math.sqrt( dx * dx + dy * dy );
			dollyEnd.set( 0, distance );
			dollyDelta.set( 0, Math.pow( dollyEnd.y / dollyStart.y, scope.zoomSpeed ) );
			dollyIn( dollyDelta.y );
			dollyStart.copy( dollyEnd );

		}

		function handleTouchMoveDollyPan( event ) {

			if ( scope.enableZoom ) handleTouchMoveDolly( event );
			if ( scope.enablePan ) handleTouchMovePan( event );

		}

		function handleTouchMoveDollyRotate( event ) {

			if ( scope.enableZoom ) handleTouchMoveDolly( event );
			if ( scope.enableRotate ) handleTouchMoveRotate( event );

		}

		function
		/*event*/
		handleTouchEnd() { // no-op
		} //
		// event handlers - FSM: listen for events and reset state
		//


		function onMouseDown( event ) {

			if ( scope.enabled === false ) return; // Prevent the browser from scrolling.

			event.preventDefault(); // Manually set the focus since calling preventDefault above
			// prevents the browser from setting it automatically.

			scope.domElement.focus ? scope.domElement.focus() : window.focus();
			var mouseAction;

			switch ( event.button ) {

				case 0:
					mouseAction = scope.mouseButtons.LEFT;
					break;

				case 1:
					mouseAction = scope.mouseButtons.MIDDLE;
					break;

				case 2:
					mouseAction = scope.mouseButtons.RIGHT;
					break;

				default:
					mouseAction = - 1;

			}

			switch ( mouseAction ) {

				case THREE.MOUSE.DOLLY:
					if ( scope.enableZoom === false ) return;
					handleMouseDownDolly( event );
					state = STATE.DOLLY;
					break;

				case THREE.MOUSE.ROTATE:
					if ( event.ctrlKey || event.metaKey || event.shiftKey ) {

						if ( scope.enablePan === false ) return;
						handleMouseDownPan( event );
						state = STATE.PAN;

					} else {

						if ( scope.enableRotate === false ) return;
						handleMouseDownRotate( event );
						state = STATE.ROTATE;

					}

					break;

				case THREE.MOUSE.PAN:
					if ( event.ctrlKey || event.metaKey || event.shiftKey ) {

						if ( scope.enableRotate === false ) return;
						handleMouseDownRotate( event );
						state = STATE.ROTATE;

					} else {

						if ( scope.enablePan === false ) return;
						handleMouseDownPan( event );
						state = STATE.PAN;

					}

					break;

				default:
					state = STATE.NONE;

			}

			if ( state !== STATE.NONE ) {

				document.addEventListener( 'mousemove', onMouseMove, false );
				document.addEventListener( 'mouseup', onMouseUp, false );
				scope.dispatchEvent( startEvent );

			}

		}

		function onMouseMove( event ) {

			if ( scope.enabled === false ) return;
			event.preventDefault();

			switch ( state ) {

				case STATE.ROTATE:
					if ( scope.enableRotate === false ) return;
					handleMouseMoveRotate( event );
					break;

				case STATE.DOLLY:
					if ( scope.enableZoom === false ) return;
					handleMouseMoveDolly( event );
					break;

				case STATE.PAN:
					if ( scope.enablePan === false ) return;
					handleMouseMovePan( event );
					break;

			}

		}

		function onMouseUp( event ) {

			if ( scope.enabled === false ) return;
			handleMouseUp( event );
			document.removeEventListener( 'mousemove', onMouseMove, false );
			document.removeEventListener( 'mouseup', onMouseUp, false );
			scope.dispatchEvent( endEvent );
			state = STATE.NONE;

		}

		function onMouseWheel( event ) {

			if ( scope.enabled === false || scope.enableZoom === false || state !== STATE.NONE && state !== STATE.ROTATE ) return;
			event.preventDefault();
			event.stopPropagation();
			scope.dispatchEvent( startEvent );
			handleMouseWheel( event );
			scope.dispatchEvent( endEvent );

		}

		function onKeyDown( event ) {

			if ( scope.enabled === false || scope.enableKeys === false || scope.enablePan === false ) return;
			handleKeyDown( event );

		}

		function onTouchStart( event ) {

			if ( scope.enabled === false ) return;
			event.preventDefault();

			switch ( event.touches.length ) {

				case 1:
					switch ( scope.touches.ONE ) {

						case THREE.TOUCH.ROTATE:
							if ( scope.enableRotate === false ) return;
							handleTouchStartRotate( event );
							state = STATE.TOUCH_ROTATE;
							break;

						case THREE.TOUCH.PAN:
							if ( scope.enablePan === false ) return;
							handleTouchStartPan( event );
							state = STATE.TOUCH_PAN;
							break;

						default:
							state = STATE.NONE;

					}

					break;

				case 2:
					switch ( scope.touches.TWO ) {

						case THREE.TOUCH.DOLLY_PAN:
							if ( scope.enableZoom === false && scope.enablePan === false ) return;
							handleTouchStartDollyPan( event );
							state = STATE.TOUCH_DOLLY_PAN;
							break;

						case THREE.TOUCH.DOLLY_ROTATE:
							if ( scope.enableZoom === false && scope.enableRotate === false ) return;
							handleTouchStartDollyRotate( event );
							state = STATE.TOUCH_DOLLY_ROTATE;
							break;

						default:
							state = STATE.NONE;

					}

					break;

				default:
					state = STATE.NONE;

			}

			if ( state !== STATE.NONE ) {

				scope.dispatchEvent( startEvent );

			}

		}

		function onTouchMove( event ) {

			if ( scope.enabled === false ) return;
			event.preventDefault();
			event.stopPropagation();

			switch ( state ) {

				case STATE.TOUCH_ROTATE:
					if ( scope.enableRotate === false ) return;
					handleTouchMoveRotate( event );
					scope.update();
					break;

				case STATE.TOUCH_PAN:
					if ( scope.enablePan === false ) return;
					handleTouchMovePan( event );
					scope.update();
					break;

				case STATE.TOUCH_DOLLY_PAN:
					if ( scope.enableZoom === false && scope.enablePan === false ) return;
					handleTouchMoveDollyPan( event );
					scope.update();
					break;

				case STATE.TOUCH_DOLLY_ROTATE:
					if ( scope.enableZoom === false && scope.enableRotate === false ) return;
					handleTouchMoveDollyRotate( event );
					scope.update();
					break;

				default:
					state = STATE.NONE;

			}

		}

		function onTouchEnd( event ) {

			if ( scope.enabled === false ) return;
			handleTouchEnd( event );
			scope.dispatchEvent( endEvent );
			state = STATE.NONE;

		}

		function onContextMenu( event ) {

			if ( scope.enabled === false ) return;
			event.preventDefault();

		} //


		scope.domElement.addEventListener( 'contextmenu', onContextMenu, false );
		scope.domElement.addEventListener( 'mousedown', onMouseDown, false );
		scope.domElement.addEventListener( 'wheel', onMouseWheel, false );
		scope.domElement.addEventListener( 'touchstart', onTouchStart, false );
		scope.domElement.addEventListener( 'touchend', onTouchEnd, false );
		scope.domElement.addEventListener( 'touchmove', onTouchMove, false );
		scope.domElement.addEventListener( 'keydown', onKeyDown, false ); // make sure element can receive keys.

		if ( scope.domElement.tabIndex === - 1 ) {

			scope.domElement.tabIndex = 0;

		} // force an update at start


		this.object.lookAt( scope.target );
		this.update();
		this.saveState();

	};

	CameraControls.prototype = Object.create( THREE.EventDispatcher.prototype );
	CameraControls.prototype.constructor = CameraControls; // OrbitControls maintains the "up" direction, camera.up (+Y by default).
	//
	//    Orbit - left mouse / touch: one-finger move
	//    Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish
	//    Pan - right mouse, or left mouse + ctrl/meta/shiftKey, or arrow keys / touch: two-finger move

	var OrbitControls = function ( object, domElement ) {

		CameraControls.call( this, object, domElement );
		this.mouseButtons.LEFT = THREE.MOUSE.ROTATE;
		this.mouseButtons.RIGHT = THREE.MOUSE.PAN;
		this.touches.ONE = THREE.TOUCH.ROTATE;
		this.touches.TWO = THREE.TOUCH.DOLLY_PAN;

	};

	OrbitControls.prototype = Object.create( THREE.EventDispatcher.prototype );
	OrbitControls.prototype.constructor = OrbitControls; // MapControls maintains the "up" direction, camera.up (+Y by default)
	//
	//    Orbit - right mouse, or left mouse + ctrl/meta/shiftKey / touch: two-finger rotate
	//    Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish
	//    Pan - left mouse, or left right + ctrl/meta/shiftKey, or arrow keys / touch: one-finger move

	var MapControls = function ( object, domElement ) {

		CameraControls.call( this, object, domElement );
		this.mouseButtons.LEFT = THREE.MOUSE.PAN;
		this.mouseButtons.RIGHT = THREE.MOUSE.ROTATE;
		this.touches.ONE = THREE.TOUCH.PAN;
		this.touches.TWO = THREE.TOUCH.DOLLY_ROTATE;

	};

	MapControls.prototype = Object.create( THREE.EventDispatcher.prototype );
	MapControls.prototype.constructor = MapControls; // TrackballControls allows the camera to rotate over the polls and does not maintain camera.up
	//
	//    Orbit - left mouse / touch: one-finger move
	//    Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish
	//    Pan - right mouse, or left mouse + ctrl/meta/shiftKey, or arrow keys / touch: two-finger move

	var TrackballControls = function ( object, domElement ) {

		CameraControls.call( this, object, domElement );
		this.trackball = true;
		this.screenSpacePanning = true;
		this.autoRotate = false;
		this.mouseButtons.LEFT = THREE.MOUSE.ROTATE;
		this.mouseButtons.RIGHT = THREE.MOUSE.PAN;
		this.touches.ONE = THREE.TOUCH.ROTATE;
		this.touches.TWO = THREE.TOUCH.DOLLY_PAN;

	};

	TrackballControls.prototype = Object.create( THREE.EventDispatcher.prototype );
	TrackballControls.prototype.constructor = TrackballControls;

	THREE.CameraControls = CameraControls;
	THREE.MapControls = MapControls;
	THREE.OrbitControls = OrbitControls;
	THREE.TrackballControls = TrackballControls;

} )();