text: ( function () {
  
  	// 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 THREE.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;
  			this.domElement.style.touchAction = 'none'; // disable touch scroll
  			// 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(); // 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: 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.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.getDistance = function () {
  
  				return this.object.position.distanceTo( this.target );
  
  			};
  
  			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.resetState = function () {
  
  				state = STATE.NONE;
  
  			}; // added by P. Boytchev
  
  
  			this.update = function () {
  
  				const offset = new THREE.Vector3(); // so camera.up is the orbit axis
  
  				const quat = new THREE.Quaternion().setFromUnitVectors( object.up, new THREE.Vector3( 0, 1, 0 ) );
  				const quatInverse = quat.clone().invert();
  				const lastPosition = new THREE.Vector3();
  				const lastQuaternion = new THREE.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( 'pointercancel', onPointerCancel );
  				scope.domElement.removeEventListener( 'wheel', onMouseWheel );
  				scope.domElement.removeEventListener( 'pointermove', onPointerMove );
  				scope.domElement.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 THREE.Spherical();
  			const sphericalDelta = new THREE.Spherical();
  			let scale = 1;
  			const panOffset = new THREE.Vector3();
  			let zoomChanged = false;
  			const rotateStart = new THREE.Vector2();
  			const rotateEnd = new THREE.Vector2();
  			const rotateDelta = new THREE.Vector2();
  			const panStart = new THREE.Vector2();
  			const panEnd = new THREE.Vector2();
  			const panDelta = new THREE.Vector2();
  			const dollyStart = new THREE.Vector2();
  			const dollyEnd = new THREE.Vector2();
  			const dollyDelta = new THREE.Vector2();
  			const pointers = [];
  			const pointerPositions = {};
  
  			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 THREE.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 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
  
  
  			const pan = function () {
  
  				const offset = new THREE.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( ) { // 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() {
  
  				if ( pointers.length === 1 ) {
  
  					rotateStart.set( pointers[ 0 ].pageX, pointers[ 0 ].pageY );
  
  				} else {
  
  					const x = 0.5 * ( pointers[ 0 ].pageX + pointers[ 1 ].pageX );
  					const y = 0.5 * ( pointers[ 0 ].pageY + pointers[ 1 ].pageY );
  					rotateStart.set( x, y );
  
  				}
  
  			}
  
  			function handleTouchStartPan() {
  
  				if ( pointers.length === 1 ) {
  
  					panStart.set( pointers[ 0 ].pageX, pointers[ 0 ].pageY );
  
  				} else {
  
  					const x = 0.5 * ( pointers[ 0 ].pageX + pointers[ 1 ].pageX );
  					const y = 0.5 * ( pointers[ 0 ].pageY + pointers[ 1 ].pageY );
  					panStart.set( x, y );
  
  				}
  
  			}
  
  			function handleTouchStartDolly() {
  
  				const dx = pointers[ 0 ].pageX - pointers[ 1 ].pageX;
  				const dy = pointers[ 0 ].pageY - pointers[ 1 ].pageY;
  				const distance = Math.sqrt( dx * dx + dy * dy );
  				dollyStart.set( 0, distance );
  
  			}
  
  			function handleTouchStartDollyPan() {
  
  				if ( scope.enableZoom ) handleTouchStartDolly();
  				if ( scope.enablePan ) handleTouchStartPan();
  
  			}
  
  			function handleTouchStartDollyRotate() {
  
  				if ( scope.enableZoom ) handleTouchStartDolly();
  				if ( scope.enableRotate ) handleTouchStartRotate();
  
  			}
  
  			function handleTouchMoveRotate( event ) {
  
  				if ( pointers.length == 1 ) {
  
  					rotateEnd.set( event.pageX, event.pageY );
  
  				} else {
  
  					const position = getSecondPointerPosition( event );
  					const x = 0.5 * ( event.pageX + position.x );
  					const y = 0.5 * ( event.pageY + position.y );
  					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 ( pointers.length === 1 ) {
  
  					panEnd.set( event.pageX, event.pageY );
  
  				} else {
  
  					const position = getSecondPointerPosition( event );
  					const x = 0.5 * ( event.pageX + position.x );
  					const y = 0.5 * ( event.pageY + position.y );
  					panEnd.set( x, y );
  
  				}
  
  				panDelta.subVectors( panEnd, panStart ).multiplyScalar( scope.panSpeed );
  				pan( panDelta.x, panDelta.y );
  				panStart.copy( panEnd );
  
  			}
  
  			function handleTouchMoveDolly( event ) {
  
  				const position = getSecondPointerPosition( event );
  				const dx = event.pageX - position.x;
  				const dy = event.pageY - position.y;
  				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( ) { // no-op
  			} //
  			// event handlers - FSM: listen for events and reset state
  			//
  
  
  			function onPointerDown( event ) {
  
  				if ( scope.enabled === false ) return;
  
  				if ( pointers.length === 0 ) {
  
  					scope.domElement.setPointerCapture( event.pointerId );
  					scope.domElement.addEventListener( 'pointermove', onPointerMove );
  					scope.domElement.addEventListener( 'pointerup', onPointerUp );
  
  				} //
  
  
  				addPointer( event );
  
  				if ( event.pointerType === 'touch' ) {
  
  					onTouchStart( event );
  
  				} else {
  
  					onMouseDown( event );
  
  				}
  
  			}
  
  			function onPointerMove( event ) {
  
  				if ( scope.enabled === false ) return;
  
  				if ( event.pointerType === 'touch' ) {
  
  					onTouchMove( event );
  
  				} else {
  
  					onMouseMove( event );
  
  				}
  
  			}
  
  			function onPointerUp( event ) {
  
  				if ( scope.enabled === false ) return;
  
  				if ( event.pointerType === 'touch' ) {
  
  					onTouchEnd();
  
  				} else {
  
  					onMouseUp( event );
  
  				}
  
  				removePointer( event ); //
  
  				if ( pointers.length === 0 ) {
  
  					scope.domElement.releasePointerCapture( event.pointerId );
  					scope.domElement.removeEventListener( 'pointermove', onPointerMove );
  					scope.domElement.removeEventListener( 'pointerup', onPointerUp );
  
  				}
  
  			}
  
  			function onPointerCancel( event ) {
  
  				removePointer( event );
  
  			}
  
  			function onMouseDown( event ) {
  
  				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 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 ) {
  
  					scope.dispatchEvent( _startEvent );
  
  				}
  
  			}
  
  			function onMouseMove( event ) {
  
  				if ( scope.enabled === false ) return;
  
  				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 ) {
  
  				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 ) {
  
  				trackPointer( event );
  
  				switch ( pointers.length ) {
  
  					case 1:
  						switch ( scope.touches.ONE ) {
  
  							case THREE.TOUCH.ROTATE:
  								if ( scope.enableRotate === false ) return;
  								handleTouchStartRotate();
  								state = STATE.TOUCH_ROTATE;
  								break;
  
  							case THREE.TOUCH.PAN:
  								if ( scope.enablePan === false ) return;
  								handleTouchStartPan();
  								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();
  								state = STATE.TOUCH_DOLLY_PAN;
  								break;
  
  							case THREE.TOUCH.DOLLY_ROTATE:
  								if ( scope.enableZoom === false && scope.enableRotate === false ) return;
  								handleTouchStartDollyRotate();
  								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 ) {
  
  				trackPointer( event );
  
  				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 ) {
  
  				handleTouchEnd( event );
  				scope.dispatchEvent( _endEvent );
  				state = STATE.NONE;
  
  			}
  
  			function onContextMenu( event ) {
  
  				if ( scope.enabled === false ) return;
  				event.preventDefault();
  
  			}
  
  			function addPointer( event ) {
  
  				pointers.push( event );
  
  			}
  
  			function removePointer( event ) {
  
  				delete pointerPositions[ event.pointerId ];
  
  				for ( let i = 0; i < pointers.length; i ++ ) {
  
  					if ( pointers[ i ].pointerId == event.pointerId ) {
  
  						pointers.splice( i, 1 );
  						return;
  
  					}
  
  				}
  
  			}
  
  			function trackPointer( event ) {
  
  				let position = pointerPositions[ event.pointerId ];
  
  				if ( position === undefined ) {
  
  					position = new THREE.Vector2();
  					pointerPositions[ event.pointerId ] = position;
  
  				}
  
  				position.set( event.pageX, event.pageY );
  
  			}
  
  			function getSecondPointerPosition( event ) {
  
  				const pointer = event.pointerId === pointers[ 0 ].pointerId ? pointers[ 1 ] : pointers[ 0 ];
  				return pointerPositions[ pointer.pointerId ];
  
  			} //
  
  
  			scope.domElement.addEventListener( 'contextmenu', onContextMenu );
  			scope.domElement.addEventListener( 'pointerdown', onPointerDown );
  			scope.domElement.addEventListener( 'pointercancel', onPointerCancel );
  			scope.domElement.addEventListener( 'wheel', onMouseWheel, {
  				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 = THREE.MOUSE.PAN;
  			this.mouseButtons.RIGHT = THREE.MOUSE.ROTATE;
  			this.touches.ONE = THREE.TOUCH.PAN;
  			this.touches.TWO = THREE.TOUCH.DOLLY_ROTATE;
  
  		}
  
  	}
  
  	THREE.MapControls = MapControls;
  	THREE.OrbitControls = OrbitControls;
  
  } )();
  