text: import {
  	EventDispatcher,
  	MOUSE,
  	Quaternion,
  	Spherical,
  	TOUCH,
  	Vector2,
  	Vector3
  } from '../.././build/three.module.js';
  
  // This set of controls performs orbiting, dollying (zooming), and panning.
  // Unlike TrackballControls, it maintains the "up" direction object.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
  
  const _changeEvent = { type: 'change' };
  const _startEvent = { type: 'start' };
  const _endEvent = { type: 'end' };
  
  class OrbitControls extends EventDispatcher {
  
  	constructor( object, domElement ) {
  
  		super();
  
  		if ( domElement === undefined ) console.warn( 'THREE.OrbitControls: The second parameter "domElement" is now mandatory.' );
  		if ( domElement === document ) console.error( 'THREE.OrbitControls: "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 Vector3();
  
  		// 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, the interval [ min, max ] must be a sub-interval of [ - 2 PI, 2 PI ], with ( max - min < 2 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 actually enables dollying in and out; left 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 = true; // if false, pan orthogonal to world-space direction camera.up
  		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
  		this.autoRotate = false;
  		this.autoRotateSpeed = 2.0; // 30 seconds per orbit when fps is 60
  
  		// The four arrow keys
  		this.keys = { LEFT: 'ArrowLeft', UP: 'ArrowUp', RIGHT: 'ArrowRight', BOTTOM: 'ArrowDown' };
  
  		// Mouse buttons
  		this.mouseButtons = { LEFT: MOUSE.ROTATE, MIDDLE: MOUSE.DOLLY, RIGHT: MOUSE.PAN };
  
  		// Touch fingers
  		this.touches = { ONE: TOUCH.ROTATE, TWO: TOUCH.DOLLY_PAN };
  
  		// for reset
  		this.target0 = this.target.clone();
  		this.position0 = this.object.position.clone();
  		this.zoom0 = this.object.zoom;
  
  		// the target DOM element for key events
  		this._domElementKeyEvents = null;
  
  		//
  		// public methods
  		//
  
  		this.getPolarAngle = function () {
  
  			return spherical.phi;
  
  		};
  
  		this.getAzimuthalAngle = function () {
  
  			return spherical.theta;
  
  		};
  
  		this.listenToKeyEvents = function ( domElement ) {
  
  			domElement.addEventListener( 'keydown', onKeyDown );
  			this._domElementKeyEvents = domElement;
  
  		};
  
  		this.saveState = function () {
  
  			scope.target0.copy( scope.target );
  			scope.position0.copy( scope.object.position );
  			scope.zoom0 = scope.object.zoom;
  
  		};
  
  		this.reset = function () {
  
  			scope.target.copy( scope.target0 );
  			scope.object.position.copy( scope.position0 );
  			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 () {
  
  			const offset = new Vector3();
  
  			// so camera.up is the orbit axis
  			const quat = new Quaternion().setFromUnitVectors( object.up, new Vector3( 0, 1, 0 ) );
  			const quatInverse = quat.clone().invert();
  
  			const lastPosition = new Vector3();
  			const lastQuaternion = new Quaternion();
  
  			const twoPI = 2 * Math.PI;
  
  			return function update() {
  
  				const position = scope.object.position;
  
  				offset.copy( position ).sub( scope.target );
  
  				// rotate offset to "y-axis-is-up" space
  				offset.applyQuaternion( quat );
  
  				// angle from z-axis around y-axis
  				spherical.setFromVector3( offset );
  
  				if ( scope.autoRotate && state === STATE.NONE ) {
  
  					rotateLeft( getAutoRotationAngle() );
  
  				}
  
  				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
  
  				let min = scope.minAzimuthAngle;
  				let max = scope.maxAzimuthAngle;
  
  				if ( isFinite( min ) && isFinite( max ) ) {
  
  					if ( min < - Math.PI ) min += twoPI; else if ( min > Math.PI ) min -= twoPI;
  
  					if ( max < - Math.PI ) max += twoPI; else if ( max > Math.PI ) max -= twoPI;
  
  					if ( min <= max ) {
  
  						spherical.theta = Math.max( min, Math.min( max, spherical.theta ) );
  
  					} else {
  
  						spherical.theta = ( spherical.theta > ( min + max ) / 2 ) ?
  							Math.max( min, spherical.theta ) :
  							Math.min( max, 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 ) );
  
  				// move target to panned location
  
  				if ( scope.enableDamping === true ) {
  
  					scope.target.addScaledVector( panOffset, scope.dampingFactor );
  
  				} else {
  
  					scope.target.add( panOffset );
  
  				}
  
  				offset.setFromSpherical( spherical );
  
  				// rotate offset back to "camera-up-vector-is-up" space
  				offset.applyQuaternion( quatInverse );
  
  				position.copy( scope.target ).add( offset );
  
  				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 );
  
  			scope.domElement.removeEventListener( 'pointerdown', onPointerDown );
  			scope.domElement.removeEventListener( 'wheel', onMouseWheel );
  
  			scope.domElement.removeEventListener( 'touchstart', onTouchStart );
  			scope.domElement.removeEventListener( 'touchend', onTouchEnd );
  			scope.domElement.removeEventListener( 'touchmove', onTouchMove );
  
  			scope.domElement.ownerDocument.removeEventListener( 'pointermove', onPointerMove );
  			scope.domElement.ownerDocument.removeEventListener( 'pointerup', onPointerUp );
  
  
  			if ( scope._domElementKeyEvents !== null ) {
  
  				scope._domElementKeyEvents.removeEventListener( 'keydown', onKeyDown );
  
  			}
  
  			//scope.dispatchEvent( { type: 'dispose' } ); // should this be added here?
  
  		};
  
  		//
  		// internals
  		//
  
  		const scope = this;
  
  		const STATE = {
  			NONE: - 1,
  			ROTATE: 0,
  			DOLLY: 1,
  			PAN: 2,
  			TOUCH_ROTATE: 3,
  			TOUCH_PAN: 4,
  			TOUCH_DOLLY_PAN: 5,
  			TOUCH_DOLLY_ROTATE: 6
  		};
  
  		let state = STATE.NONE;
  
  		const EPS = 0.000001;
  
  		// current position in spherical coordinates
  		const spherical = new Spherical();
  		const sphericalDelta = new Spherical();
  
  		let scale = 1;
  		const panOffset = new Vector3();
  		let zoomChanged = false;
  
  		const rotateStart = new Vector2();
  		const rotateEnd = new Vector2();
  		const rotateDelta = new Vector2();
  
  		const panStart = new Vector2();
  		const panEnd = new Vector2();
  		const panDelta = new Vector2();
  
  		const dollyStart = new Vector2();
  		const dollyEnd = new Vector2();
  		const dollyDelta = new 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;
  
  		}
  
  		const panLeft = function () {
  
  			const v = new Vector3();
  
  			return function panLeft( distance, objectMatrix ) {
  
  				v.setFromMatrixColumn( objectMatrix, 0 ); // get X column of objectMatrix
  				v.multiplyScalar( - distance );
  
  				panOffset.add( v );
  
  			};
  
  		}();
  
  		const panUp = function () {
  
  			const v = new 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
  		const pan = function () {
  
  			const offset = new Vector3();
  
  			return function pan( deltaX, deltaY ) {
  
  				const element = scope.domElement;
  
  				if ( scope.object.isPerspectiveCamera ) {
  
  					// perspective
  					const position = scope.object.position;
  					offset.copy( position ).sub( scope.target );
  					let 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: OrbitControls.js encountered an unknown camera type - pan disabled.' );
  					scope.enablePan = 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: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.' );
  				scope.enableZoom = 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: OrbitControls.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 );
  
  			const 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 ) {
  
  				dollyOut( getZoomScale() );
  
  			} else if ( dollyDelta.y < 0 ) {
  
  				dollyIn( 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 handleMouseUp( /*event*/ ) {
  
  			// no-op
  
  		}
  
  		function handleMouseWheel( event ) {
  
  			if ( event.deltaY < 0 ) {
  
  				dollyIn( getZoomScale() );
  
  			} else if ( event.deltaY > 0 ) {
  
  				dollyOut( getZoomScale() );
  
  			}
  
  			scope.update();
  
  		}
  
  		function handleKeyDown( event ) {
  
  			let needsUpdate = false;
  
  			switch ( event.code ) {
  
  				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 {
  
  				const x = 0.5 * ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX );
  				const 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 {
  
  				const x = 0.5 * ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX );
  				const y = 0.5 * ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY );
  
  				panStart.set( x, y );
  
  			}
  
  		}
  
  		function handleTouchStartDolly( event ) {
  
  			const dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX;
  			const dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY;
  
  			const 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 {
  
  				const x = 0.5 * ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX );
  				const y = 0.5 * ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY );
  
  				rotateEnd.set( x, y );
  
  			}
  
  			rotateDelta.subVectors( rotateEnd, rotateStart ).multiplyScalar( scope.rotateSpeed );
  
  			const 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 {
  
  				const x = 0.5 * ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX );
  				const 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 ) {
  
  			const dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX;
  			const dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY;
  
  			const distance = Math.sqrt( dx * dx + dy * dy );
  
  			dollyEnd.set( 0, distance );
  
  			dollyDelta.set( 0, Math.pow( dollyEnd.y / dollyStart.y, scope.zoomSpeed ) );
  
  			dollyOut( 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 handleTouchEnd( /*event*/ ) {
  
  			// no-op
  
  		}
  
  		//
  		// event handlers - FSM: listen for events and reset state
  		//
  
  		function onPointerDown( event ) {
  
  			if ( scope.enabled === false ) return;
  
  			switch ( event.pointerType ) {
  
  				case 'mouse':
  				case 'pen':
  					onMouseDown( event );
  					break;
  
  				// TODO touch
  
  			}
  
  		}
  
  		function onPointerMove( event ) {
  
  			if ( scope.enabled === false ) return;
  
  			switch ( event.pointerType ) {
  
  				case 'mouse':
  				case 'pen':
  					onMouseMove( event );
  					break;
  
  				// TODO touch
  
  			}
  
  		}
  
  		function onPointerUp( event ) {
  
  			switch ( event.pointerType ) {
  
  				case 'mouse':
  				case 'pen':
  					onMouseUp( event );
  					break;
  
  				// TODO touch
  
  			}
  
  		}
  
  		function onMouseDown( event ) {
  
  			// 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();
  
  			let 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 MOUSE.DOLLY:
  
  					if ( scope.enableZoom === false ) return;
  
  					handleMouseDownDolly( event );
  
  					state = STATE.DOLLY;
  
  					break;
  
  				case 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 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 ) {
  
  				scope.domElement.ownerDocument.addEventListener( 'pointermove', onPointerMove );
  				scope.domElement.ownerDocument.addEventListener( 'pointerup', onPointerUp );
  
  				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 ) {
  
  			scope.domElement.ownerDocument.removeEventListener( 'pointermove', onPointerMove );
  			scope.domElement.ownerDocument.removeEventListener( 'pointerup', onPointerUp );
  
  			if ( scope.enabled === false ) return;
  
  			handleMouseUp( event );
  
  			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();
  
  			scope.dispatchEvent( _startEvent );
  
  			handleMouseWheel( event );
  
  			scope.dispatchEvent( _endEvent );
  
  		}
  
  		function onKeyDown( event ) {
  
  			if ( scope.enabled === false || scope.enablePan === false ) return;
  
  			handleKeyDown( event );
  
  		}
  
  		function onTouchStart( event ) {
  
  			if ( scope.enabled === false ) return;
  
  			event.preventDefault(); // prevent scrolling
  
  			switch ( event.touches.length ) {
  
  				case 1:
  
  					switch ( scope.touches.ONE ) {
  
  						case TOUCH.ROTATE:
  
  							if ( scope.enableRotate === false ) return;
  
  							handleTouchStartRotate( event );
  
  							state = STATE.TOUCH_ROTATE;
  
  							break;
  
  						case 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 TOUCH.DOLLY_PAN:
  
  							if ( scope.enableZoom === false && scope.enablePan === false ) return;
  
  							handleTouchStartDollyPan( event );
  
  							state = STATE.TOUCH_DOLLY_PAN;
  
  							break;
  
  						case 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(); // prevent scrolling
  
  			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 );
  
  		scope.domElement.addEventListener( 'pointerdown', onPointerDown );
  		scope.domElement.addEventListener( 'wheel', onMouseWheel, { passive: false } );
  
  		scope.domElement.addEventListener( 'touchstart', onTouchStart, { passive: false } );
  		scope.domElement.addEventListener( 'touchend', onTouchEnd );
  		scope.domElement.addEventListener( 'touchmove', onTouchMove, { passive: false } );
  
  		// force an update at start
  
  		this.update();
  
  	}
  
  }
  
  
  // This set of controls performs orbiting, dollying (zooming), and panning.
  // Unlike TrackballControls, it maintains the "up" direction object.up (+Y by default).
  // This is very similar to OrbitControls, another set of touch behavior
  //
  //    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 arrow keys / touch: one-finger move
  
  class MapControls extends OrbitControls {
  
  	constructor( object, domElement ) {
  
  		super( object, domElement );
  
  		this.screenSpacePanning = false; // pan orthogonal to world-space direction camera.up
  
  		this.mouseButtons.LEFT = MOUSE.PAN;
  		this.mouseButtons.RIGHT = MOUSE.ROTATE;
  
  		this.touches.ONE = TOUCH.PAN;
  		this.touches.TWO = TOUCH.DOLLY_ROTATE;
  
  	}
  
  }
  
  export { OrbitControls, MapControls };
  