829 lines
		
	
	
		
			17 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
		
		
			
		
	
	
			829 lines
		
	
	
		
			17 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
|  | import { | ||
|  | 	EventDispatcher, | ||
|  | 	MathUtils, | ||
|  | 	MOUSE, | ||
|  | 	Quaternion, | ||
|  | 	Vector2, | ||
|  | 	Vector3 | ||
|  | } from 'three'; | ||
|  | 
 | ||
|  | const _changeEvent = { type: 'change' }; | ||
|  | const _startEvent = { type: 'start' }; | ||
|  | const _endEvent = { type: 'end' }; | ||
|  | 
 | ||
|  | class TrackballControls extends EventDispatcher { | ||
|  | 
 | ||
|  | 	constructor( object, domElement ) { | ||
|  | 
 | ||
|  | 		super(); | ||
|  | 
 | ||
|  | 		const scope = this; | ||
|  | 		const STATE = { NONE: - 1, ROTATE: 0, ZOOM: 1, PAN: 2, TOUCH_ROTATE: 3, TOUCH_ZOOM_PAN: 4 }; | ||
|  | 
 | ||
|  | 		this.object = object; | ||
|  | 		this.domElement = domElement; | ||
|  | 		this.domElement.style.touchAction = 'none'; // disable touch scroll
 | ||
|  | 
 | ||
|  | 		// API
 | ||
|  | 
 | ||
|  | 		this.enabled = true; | ||
|  | 
 | ||
|  | 		this.screen = { left: 0, top: 0, width: 0, height: 0 }; | ||
|  | 
 | ||
|  | 		this.rotateSpeed = 1.0; | ||
|  | 		this.zoomSpeed = 1.2; | ||
|  | 		this.panSpeed = 0.3; | ||
|  | 
 | ||
|  | 		this.noRotate = false; | ||
|  | 		this.noZoom = false; | ||
|  | 		this.noPan = false; | ||
|  | 
 | ||
|  | 		this.staticMoving = false; | ||
|  | 		this.dynamicDampingFactor = 0.2; | ||
|  | 
 | ||
|  | 		this.minDistance = 0; | ||
|  | 		this.maxDistance = Infinity; | ||
|  | 
 | ||
|  | 		this.minZoom = 0; | ||
|  | 		this.maxZoom = Infinity; | ||
|  | 
 | ||
|  | 		this.keys = [ 'KeyA' /*A*/, 'KeyS' /*S*/, 'KeyD' /*D*/ ]; | ||
|  | 
 | ||
|  | 		this.mouseButtons = { LEFT: MOUSE.ROTATE, MIDDLE: MOUSE.DOLLY, RIGHT: MOUSE.PAN }; | ||
|  | 
 | ||
|  | 		// internals
 | ||
|  | 
 | ||
|  | 		this.target = new Vector3(); | ||
|  | 
 | ||
|  | 		const EPS = 0.000001; | ||
|  | 
 | ||
|  | 		const lastPosition = new Vector3(); | ||
|  | 		let lastZoom = 1; | ||
|  | 
 | ||
|  | 		let _state = STATE.NONE, | ||
|  | 			_keyState = STATE.NONE, | ||
|  | 
 | ||
|  | 			_touchZoomDistanceStart = 0, | ||
|  | 			_touchZoomDistanceEnd = 0, | ||
|  | 
 | ||
|  | 			_lastAngle = 0; | ||
|  | 
 | ||
|  | 		const _eye = new Vector3(), | ||
|  | 
 | ||
|  | 			_movePrev = new Vector2(), | ||
|  | 			_moveCurr = new Vector2(), | ||
|  | 
 | ||
|  | 			_lastAxis = new Vector3(), | ||
|  | 
 | ||
|  | 			_zoomStart = new Vector2(), | ||
|  | 			_zoomEnd = new Vector2(), | ||
|  | 
 | ||
|  | 			_panStart = new Vector2(), | ||
|  | 			_panEnd = new Vector2(), | ||
|  | 
 | ||
|  | 			_pointers = [], | ||
|  | 			_pointerPositions = {}; | ||
|  | 
 | ||
|  | 		// for reset
 | ||
|  | 
 | ||
|  | 		this.target0 = this.target.clone(); | ||
|  | 		this.position0 = this.object.position.clone(); | ||
|  | 		this.up0 = this.object.up.clone(); | ||
|  | 		this.zoom0 = this.object.zoom; | ||
|  | 
 | ||
|  | 		// methods
 | ||
|  | 
 | ||
|  | 		this.handleResize = function () { | ||
|  | 
 | ||
|  | 			const box = scope.domElement.getBoundingClientRect(); | ||
|  | 			// adjustments come from similar code in the jquery offset() function
 | ||
|  | 			const d = scope.domElement.ownerDocument.documentElement; | ||
|  | 			scope.screen.left = box.left + window.pageXOffset - d.clientLeft; | ||
|  | 			scope.screen.top = box.top + window.pageYOffset - d.clientTop; | ||
|  | 			scope.screen.width = box.width; | ||
|  | 			scope.screen.height = box.height; | ||
|  | 
 | ||
|  | 		}; | ||
|  | 
 | ||
|  | 		const getMouseOnScreen = ( function () { | ||
|  | 
 | ||
|  | 			const vector = new Vector2(); | ||
|  | 
 | ||
|  | 			return function getMouseOnScreen( pageX, pageY ) { | ||
|  | 
 | ||
|  | 				vector.set( | ||
|  | 					( pageX - scope.screen.left ) / scope.screen.width, | ||
|  | 					( pageY - scope.screen.top ) / scope.screen.height | ||
|  | 				); | ||
|  | 
 | ||
|  | 				return vector; | ||
|  | 
 | ||
|  | 			}; | ||
|  | 
 | ||
|  | 		}() ); | ||
|  | 
 | ||
|  | 		const getMouseOnCircle = ( function () { | ||
|  | 
 | ||
|  | 			const vector = new Vector2(); | ||
|  | 
 | ||
|  | 			return function getMouseOnCircle( pageX, pageY ) { | ||
|  | 
 | ||
|  | 				vector.set( | ||
|  | 					( ( pageX - scope.screen.width * 0.5 - scope.screen.left ) / ( scope.screen.width * 0.5 ) ), | ||
|  | 					( ( scope.screen.height + 2 * ( scope.screen.top - pageY ) ) / scope.screen.width ) // screen.width intentional
 | ||
|  | 				); | ||
|  | 
 | ||
|  | 				return vector; | ||
|  | 
 | ||
|  | 			}; | ||
|  | 
 | ||
|  | 		}() ); | ||
|  | 
 | ||
|  | 		this.rotateCamera = ( function () { | ||
|  | 
 | ||
|  | 			const axis = new Vector3(), | ||
|  | 				quaternion = new Quaternion(), | ||
|  | 				eyeDirection = new Vector3(), | ||
|  | 				objectUpDirection = new Vector3(), | ||
|  | 				objectSidewaysDirection = new Vector3(), | ||
|  | 				moveDirection = new Vector3(); | ||
|  | 
 | ||
|  | 			return function rotateCamera() { | ||
|  | 
 | ||
|  | 				moveDirection.set( _moveCurr.x - _movePrev.x, _moveCurr.y - _movePrev.y, 0 ); | ||
|  | 				let angle = moveDirection.length(); | ||
|  | 
 | ||
|  | 				if ( angle ) { | ||
|  | 
 | ||
|  | 					_eye.copy( scope.object.position ).sub( scope.target ); | ||
|  | 
 | ||
|  | 					eyeDirection.copy( _eye ).normalize(); | ||
|  | 					objectUpDirection.copy( scope.object.up ).normalize(); | ||
|  | 					objectSidewaysDirection.crossVectors( objectUpDirection, eyeDirection ).normalize(); | ||
|  | 
 | ||
|  | 					objectUpDirection.setLength( _moveCurr.y - _movePrev.y ); | ||
|  | 					objectSidewaysDirection.setLength( _moveCurr.x - _movePrev.x ); | ||
|  | 
 | ||
|  | 					moveDirection.copy( objectUpDirection.add( objectSidewaysDirection ) ); | ||
|  | 
 | ||
|  | 					axis.crossVectors( moveDirection, _eye ).normalize(); | ||
|  | 
 | ||
|  | 					angle *= scope.rotateSpeed; | ||
|  | 					quaternion.setFromAxisAngle( axis, angle ); | ||
|  | 
 | ||
|  | 					_eye.applyQuaternion( quaternion ); | ||
|  | 					scope.object.up.applyQuaternion( quaternion ); | ||
|  | 
 | ||
|  | 					_lastAxis.copy( axis ); | ||
|  | 					_lastAngle = angle; | ||
|  | 
 | ||
|  | 				} else if ( ! scope.staticMoving && _lastAngle ) { | ||
|  | 
 | ||
|  | 					_lastAngle *= Math.sqrt( 1.0 - scope.dynamicDampingFactor ); | ||
|  | 					_eye.copy( scope.object.position ).sub( scope.target ); | ||
|  | 					quaternion.setFromAxisAngle( _lastAxis, _lastAngle ); | ||
|  | 					_eye.applyQuaternion( quaternion ); | ||
|  | 					scope.object.up.applyQuaternion( quaternion ); | ||
|  | 
 | ||
|  | 				} | ||
|  | 
 | ||
|  | 				_movePrev.copy( _moveCurr ); | ||
|  | 
 | ||
|  | 			}; | ||
|  | 
 | ||
|  | 		}() ); | ||
|  | 
 | ||
|  | 
 | ||
|  | 		this.zoomCamera = function () { | ||
|  | 
 | ||
|  | 			let factor; | ||
|  | 
 | ||
|  | 			if ( _state === STATE.TOUCH_ZOOM_PAN ) { | ||
|  | 
 | ||
|  | 				factor = _touchZoomDistanceStart / _touchZoomDistanceEnd; | ||
|  | 				_touchZoomDistanceStart = _touchZoomDistanceEnd; | ||
|  | 
 | ||
|  | 				if ( scope.object.isPerspectiveCamera ) { | ||
|  | 
 | ||
|  | 					_eye.multiplyScalar( factor ); | ||
|  | 
 | ||
|  | 				} else if ( scope.object.isOrthographicCamera ) { | ||
|  | 
 | ||
|  | 					scope.object.zoom = MathUtils.clamp( scope.object.zoom / factor, scope.minZoom, scope.maxZoom ); | ||
|  | 
 | ||
|  | 					if ( lastZoom !== scope.object.zoom ) { | ||
|  | 
 | ||
|  | 						scope.object.updateProjectionMatrix(); | ||
|  | 
 | ||
|  | 					} | ||
|  | 
 | ||
|  | 				} else { | ||
|  | 
 | ||
|  | 					console.warn( 'THREE.TrackballControls: Unsupported camera type' ); | ||
|  | 
 | ||
|  | 				} | ||
|  | 
 | ||
|  | 			} else { | ||
|  | 
 | ||
|  | 				factor = 1.0 + ( _zoomEnd.y - _zoomStart.y ) * scope.zoomSpeed; | ||
|  | 
 | ||
|  | 				if ( factor !== 1.0 && factor > 0.0 ) { | ||
|  | 
 | ||
|  | 					if ( scope.object.isPerspectiveCamera ) { | ||
|  | 
 | ||
|  | 						_eye.multiplyScalar( factor ); | ||
|  | 
 | ||
|  | 					} else if ( scope.object.isOrthographicCamera ) { | ||
|  | 
 | ||
|  | 						scope.object.zoom = MathUtils.clamp( scope.object.zoom / factor, scope.minZoom, scope.maxZoom ); | ||
|  | 
 | ||
|  | 						if ( lastZoom !== scope.object.zoom ) { | ||
|  | 
 | ||
|  | 							scope.object.updateProjectionMatrix(); | ||
|  | 
 | ||
|  | 						} | ||
|  | 
 | ||
|  | 					} else { | ||
|  | 
 | ||
|  | 						console.warn( 'THREE.TrackballControls: Unsupported camera type' ); | ||
|  | 
 | ||
|  | 					} | ||
|  | 
 | ||
|  | 				} | ||
|  | 
 | ||
|  | 				if ( scope.staticMoving ) { | ||
|  | 
 | ||
|  | 					_zoomStart.copy( _zoomEnd ); | ||
|  | 
 | ||
|  | 				} else { | ||
|  | 
 | ||
|  | 					_zoomStart.y += ( _zoomEnd.y - _zoomStart.y ) * this.dynamicDampingFactor; | ||
|  | 
 | ||
|  | 				} | ||
|  | 
 | ||
|  | 			} | ||
|  | 
 | ||
|  | 		}; | ||
|  | 
 | ||
|  | 		this.panCamera = ( function () { | ||
|  | 
 | ||
|  | 			const mouseChange = new Vector2(), | ||
|  | 				objectUp = new Vector3(), | ||
|  | 				pan = new Vector3(); | ||
|  | 
 | ||
|  | 			return function panCamera() { | ||
|  | 
 | ||
|  | 				mouseChange.copy( _panEnd ).sub( _panStart ); | ||
|  | 
 | ||
|  | 				if ( mouseChange.lengthSq() ) { | ||
|  | 
 | ||
|  | 					if ( scope.object.isOrthographicCamera ) { | ||
|  | 
 | ||
|  | 						const scale_x = ( scope.object.right - scope.object.left ) / scope.object.zoom / scope.domElement.clientWidth; | ||
|  | 						const scale_y = ( scope.object.top - scope.object.bottom ) / scope.object.zoom / scope.domElement.clientWidth; | ||
|  | 
 | ||
|  | 						mouseChange.x *= scale_x; | ||
|  | 						mouseChange.y *= scale_y; | ||
|  | 
 | ||
|  | 					} | ||
|  | 
 | ||
|  | 					mouseChange.multiplyScalar( _eye.length() * scope.panSpeed ); | ||
|  | 
 | ||
|  | 					pan.copy( _eye ).cross( scope.object.up ).setLength( mouseChange.x ); | ||
|  | 					pan.add( objectUp.copy( scope.object.up ).setLength( mouseChange.y ) ); | ||
|  | 
 | ||
|  | 					scope.object.position.add( pan ); | ||
|  | 					scope.target.add( pan ); | ||
|  | 
 | ||
|  | 					if ( scope.staticMoving ) { | ||
|  | 
 | ||
|  | 						_panStart.copy( _panEnd ); | ||
|  | 
 | ||
|  | 					} else { | ||
|  | 
 | ||
|  | 						_panStart.add( mouseChange.subVectors( _panEnd, _panStart ).multiplyScalar( scope.dynamicDampingFactor ) ); | ||
|  | 
 | ||
|  | 					} | ||
|  | 
 | ||
|  | 				} | ||
|  | 
 | ||
|  | 			}; | ||
|  | 
 | ||
|  | 		}() ); | ||
|  | 
 | ||
|  | 		this.checkDistances = function () { | ||
|  | 
 | ||
|  | 			if ( ! scope.noZoom || ! scope.noPan ) { | ||
|  | 
 | ||
|  | 				if ( _eye.lengthSq() > scope.maxDistance * scope.maxDistance ) { | ||
|  | 
 | ||
|  | 					scope.object.position.addVectors( scope.target, _eye.setLength( scope.maxDistance ) ); | ||
|  | 					_zoomStart.copy( _zoomEnd ); | ||
|  | 
 | ||
|  | 				} | ||
|  | 
 | ||
|  | 				if ( _eye.lengthSq() < scope.minDistance * scope.minDistance ) { | ||
|  | 
 | ||
|  | 					scope.object.position.addVectors( scope.target, _eye.setLength( scope.minDistance ) ); | ||
|  | 					_zoomStart.copy( _zoomEnd ); | ||
|  | 
 | ||
|  | 				} | ||
|  | 
 | ||
|  | 			} | ||
|  | 
 | ||
|  | 		}; | ||
|  | 
 | ||
|  | 		this.update = function () { | ||
|  | 
 | ||
|  | 			_eye.subVectors( scope.object.position, scope.target ); | ||
|  | 
 | ||
|  | 			if ( ! scope.noRotate ) { | ||
|  | 
 | ||
|  | 				scope.rotateCamera(); | ||
|  | 
 | ||
|  | 			} | ||
|  | 
 | ||
|  | 			if ( ! scope.noZoom ) { | ||
|  | 
 | ||
|  | 				scope.zoomCamera(); | ||
|  | 
 | ||
|  | 			} | ||
|  | 
 | ||
|  | 			if ( ! scope.noPan ) { | ||
|  | 
 | ||
|  | 				scope.panCamera(); | ||
|  | 
 | ||
|  | 			} | ||
|  | 
 | ||
|  | 			scope.object.position.addVectors( scope.target, _eye ); | ||
|  | 
 | ||
|  | 			if ( scope.object.isPerspectiveCamera ) { | ||
|  | 
 | ||
|  | 				scope.checkDistances(); | ||
|  | 
 | ||
|  | 				scope.object.lookAt( scope.target ); | ||
|  | 
 | ||
|  | 				if ( lastPosition.distanceToSquared( scope.object.position ) > EPS ) { | ||
|  | 
 | ||
|  | 					scope.dispatchEvent( _changeEvent ); | ||
|  | 
 | ||
|  | 					lastPosition.copy( scope.object.position ); | ||
|  | 
 | ||
|  | 				} | ||
|  | 
 | ||
|  | 			} else if ( scope.object.isOrthographicCamera ) { | ||
|  | 
 | ||
|  | 				scope.object.lookAt( scope.target ); | ||
|  | 
 | ||
|  | 				if ( lastPosition.distanceToSquared( scope.object.position ) > EPS || lastZoom !== scope.object.zoom ) { | ||
|  | 
 | ||
|  | 					scope.dispatchEvent( _changeEvent ); | ||
|  | 
 | ||
|  | 					lastPosition.copy( scope.object.position ); | ||
|  | 					lastZoom = scope.object.zoom; | ||
|  | 
 | ||
|  | 				} | ||
|  | 
 | ||
|  | 			} else { | ||
|  | 
 | ||
|  | 				console.warn( 'THREE.TrackballControls: Unsupported camera type' ); | ||
|  | 
 | ||
|  | 			} | ||
|  | 
 | ||
|  | 		}; | ||
|  | 
 | ||
|  | 		this.reset = function () { | ||
|  | 
 | ||
|  | 			_state = STATE.NONE; | ||
|  | 			_keyState = STATE.NONE; | ||
|  | 
 | ||
|  | 			scope.target.copy( scope.target0 ); | ||
|  | 			scope.object.position.copy( scope.position0 ); | ||
|  | 			scope.object.up.copy( scope.up0 ); | ||
|  | 			scope.object.zoom = scope.zoom0; | ||
|  | 
 | ||
|  | 			scope.object.updateProjectionMatrix(); | ||
|  | 
 | ||
|  | 			_eye.subVectors( scope.object.position, scope.target ); | ||
|  | 
 | ||
|  | 			scope.object.lookAt( scope.target ); | ||
|  | 
 | ||
|  | 			scope.dispatchEvent( _changeEvent ); | ||
|  | 
 | ||
|  | 			lastPosition.copy( scope.object.position ); | ||
|  | 			lastZoom = scope.object.zoom; | ||
|  | 
 | ||
|  | 		}; | ||
|  | 
 | ||
|  | 		// listeners
 | ||
|  | 
 | ||
|  | 		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( event ); | ||
|  | 
 | ||
|  | 			} else { | ||
|  | 
 | ||
|  | 				onMouseUp(); | ||
|  | 
 | ||
|  | 			} | ||
|  | 
 | ||
|  | 			//
 | ||
|  | 
 | ||
|  | 			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 keydown( event ) { | ||
|  | 
 | ||
|  | 			if ( scope.enabled === false ) return; | ||
|  | 
 | ||
|  | 			window.removeEventListener( 'keydown', keydown ); | ||
|  | 
 | ||
|  | 			if ( _keyState !== STATE.NONE ) { | ||
|  | 
 | ||
|  | 				return; | ||
|  | 
 | ||
|  | 			} else if ( event.code === scope.keys[ STATE.ROTATE ] && ! scope.noRotate ) { | ||
|  | 
 | ||
|  | 				_keyState = STATE.ROTATE; | ||
|  | 
 | ||
|  | 			} else if ( event.code === scope.keys[ STATE.ZOOM ] && ! scope.noZoom ) { | ||
|  | 
 | ||
|  | 				_keyState = STATE.ZOOM; | ||
|  | 
 | ||
|  | 			} else if ( event.code === scope.keys[ STATE.PAN ] && ! scope.noPan ) { | ||
|  | 
 | ||
|  | 				_keyState = STATE.PAN; | ||
|  | 
 | ||
|  | 			} | ||
|  | 
 | ||
|  | 		} | ||
|  | 
 | ||
|  | 		function keyup() { | ||
|  | 
 | ||
|  | 			if ( scope.enabled === false ) return; | ||
|  | 
 | ||
|  | 			_keyState = STATE.NONE; | ||
|  | 
 | ||
|  | 			window.addEventListener( 'keydown', keydown ); | ||
|  | 
 | ||
|  | 		} | ||
|  | 
 | ||
|  | 		function onMouseDown( event ) { | ||
|  | 
 | ||
|  | 			if ( _state === STATE.NONE ) { | ||
|  | 
 | ||
|  | 				switch ( event.button ) { | ||
|  | 
 | ||
|  | 					case scope.mouseButtons.LEFT: | ||
|  | 						_state = STATE.ROTATE; | ||
|  | 						break; | ||
|  | 
 | ||
|  | 					case scope.mouseButtons.MIDDLE: | ||
|  | 						_state = STATE.ZOOM; | ||
|  | 						break; | ||
|  | 
 | ||
|  | 					case scope.mouseButtons.RIGHT: | ||
|  | 						_state = STATE.PAN; | ||
|  | 						break; | ||
|  | 
 | ||
|  | 				} | ||
|  | 
 | ||
|  | 			} | ||
|  | 
 | ||
|  | 			const state = ( _keyState !== STATE.NONE ) ? _keyState : _state; | ||
|  | 
 | ||
|  | 			if ( state === STATE.ROTATE && ! scope.noRotate ) { | ||
|  | 
 | ||
|  | 				_moveCurr.copy( getMouseOnCircle( event.pageX, event.pageY ) ); | ||
|  | 				_movePrev.copy( _moveCurr ); | ||
|  | 
 | ||
|  | 			} else if ( state === STATE.ZOOM && ! scope.noZoom ) { | ||
|  | 
 | ||
|  | 				_zoomStart.copy( getMouseOnScreen( event.pageX, event.pageY ) ); | ||
|  | 				_zoomEnd.copy( _zoomStart ); | ||
|  | 
 | ||
|  | 			} else if ( state === STATE.PAN && ! scope.noPan ) { | ||
|  | 
 | ||
|  | 				_panStart.copy( getMouseOnScreen( event.pageX, event.pageY ) ); | ||
|  | 				_panEnd.copy( _panStart ); | ||
|  | 
 | ||
|  | 			} | ||
|  | 
 | ||
|  | 			scope.dispatchEvent( _startEvent ); | ||
|  | 
 | ||
|  | 		} | ||
|  | 
 | ||
|  | 		function onMouseMove( event ) { | ||
|  | 
 | ||
|  | 			const state = ( _keyState !== STATE.NONE ) ? _keyState : _state; | ||
|  | 
 | ||
|  | 			if ( state === STATE.ROTATE && ! scope.noRotate ) { | ||
|  | 
 | ||
|  | 				_movePrev.copy( _moveCurr ); | ||
|  | 				_moveCurr.copy( getMouseOnCircle( event.pageX, event.pageY ) ); | ||
|  | 
 | ||
|  | 			} else if ( state === STATE.ZOOM && ! scope.noZoom ) { | ||
|  | 
 | ||
|  | 				_zoomEnd.copy( getMouseOnScreen( event.pageX, event.pageY ) ); | ||
|  | 
 | ||
|  | 			} else if ( state === STATE.PAN && ! scope.noPan ) { | ||
|  | 
 | ||
|  | 				_panEnd.copy( getMouseOnScreen( event.pageX, event.pageY ) ); | ||
|  | 
 | ||
|  | 			} | ||
|  | 
 | ||
|  | 		} | ||
|  | 
 | ||
|  | 		function onMouseUp() { | ||
|  | 
 | ||
|  | 			_state = STATE.NONE; | ||
|  | 
 | ||
|  | 			scope.dispatchEvent( _endEvent ); | ||
|  | 
 | ||
|  | 		} | ||
|  | 
 | ||
|  | 		function onMouseWheel( event ) { | ||
|  | 
 | ||
|  | 			if ( scope.enabled === false ) return; | ||
|  | 
 | ||
|  | 			if ( scope.noZoom === true ) return; | ||
|  | 
 | ||
|  | 			event.preventDefault(); | ||
|  | 
 | ||
|  | 			switch ( event.deltaMode ) { | ||
|  | 
 | ||
|  | 				case 2: | ||
|  | 					// Zoom in pages
 | ||
|  | 					_zoomStart.y -= event.deltaY * 0.025; | ||
|  | 					break; | ||
|  | 
 | ||
|  | 				case 1: | ||
|  | 					// Zoom in lines
 | ||
|  | 					_zoomStart.y -= event.deltaY * 0.01; | ||
|  | 					break; | ||
|  | 
 | ||
|  | 				default: | ||
|  | 					// undefined, 0, assume pixels
 | ||
|  | 					_zoomStart.y -= event.deltaY * 0.00025; | ||
|  | 					break; | ||
|  | 
 | ||
|  | 			} | ||
|  | 
 | ||
|  | 			scope.dispatchEvent( _startEvent ); | ||
|  | 			scope.dispatchEvent( _endEvent ); | ||
|  | 
 | ||
|  | 		} | ||
|  | 
 | ||
|  | 		function onTouchStart( event ) { | ||
|  | 
 | ||
|  | 			trackPointer( event ); | ||
|  | 
 | ||
|  | 			switch ( _pointers.length ) { | ||
|  | 
 | ||
|  | 				case 1: | ||
|  | 					_state = STATE.TOUCH_ROTATE; | ||
|  | 					_moveCurr.copy( getMouseOnCircle( _pointers[ 0 ].pageX, _pointers[ 0 ].pageY ) ); | ||
|  | 					_movePrev.copy( _moveCurr ); | ||
|  | 					break; | ||
|  | 
 | ||
|  | 				default: // 2 or more
 | ||
|  | 					_state = STATE.TOUCH_ZOOM_PAN; | ||
|  | 					const dx = _pointers[ 0 ].pageX - _pointers[ 1 ].pageX; | ||
|  | 					const dy = _pointers[ 0 ].pageY - _pointers[ 1 ].pageY; | ||
|  | 					_touchZoomDistanceEnd = _touchZoomDistanceStart = Math.sqrt( dx * dx + dy * dy ); | ||
|  | 
 | ||
|  | 					const x = ( _pointers[ 0 ].pageX + _pointers[ 1 ].pageX ) / 2; | ||
|  | 					const y = ( _pointers[ 0 ].pageY + _pointers[ 1 ].pageY ) / 2; | ||
|  | 					_panStart.copy( getMouseOnScreen( x, y ) ); | ||
|  | 					_panEnd.copy( _panStart ); | ||
|  | 					break; | ||
|  | 
 | ||
|  | 			} | ||
|  | 
 | ||
|  | 			scope.dispatchEvent( _startEvent ); | ||
|  | 
 | ||
|  | 		} | ||
|  | 
 | ||
|  | 		function onTouchMove( event ) { | ||
|  | 
 | ||
|  | 			trackPointer( event ); | ||
|  | 
 | ||
|  | 			switch ( _pointers.length ) { | ||
|  | 
 | ||
|  | 				case 1: | ||
|  | 					_movePrev.copy( _moveCurr ); | ||
|  | 					_moveCurr.copy( getMouseOnCircle( event.pageX, event.pageY ) ); | ||
|  | 					break; | ||
|  | 
 | ||
|  | 				default: // 2 or more
 | ||
|  | 
 | ||
|  | 					const position = getSecondPointerPosition( event ); | ||
|  | 
 | ||
|  | 					const dx = event.pageX - position.x; | ||
|  | 					const dy = event.pageY - position.y; | ||
|  | 					_touchZoomDistanceEnd = Math.sqrt( dx * dx + dy * dy ); | ||
|  | 
 | ||
|  | 					const x = ( event.pageX + position.x ) / 2; | ||
|  | 					const y = ( event.pageY + position.y ) / 2; | ||
|  | 					_panEnd.copy( getMouseOnScreen( x, y ) ); | ||
|  | 					break; | ||
|  | 
 | ||
|  | 			} | ||
|  | 
 | ||
|  | 		} | ||
|  | 
 | ||
|  | 		function onTouchEnd( event ) { | ||
|  | 
 | ||
|  | 			switch ( _pointers.length ) { | ||
|  | 
 | ||
|  | 				case 0: | ||
|  | 					_state = STATE.NONE; | ||
|  | 					break; | ||
|  | 
 | ||
|  | 				case 1: | ||
|  | 					_state = STATE.TOUCH_ROTATE; | ||
|  | 					_moveCurr.copy( getMouseOnCircle( event.pageX, event.pageY ) ); | ||
|  | 					_movePrev.copy( _moveCurr ); | ||
|  | 					break; | ||
|  | 
 | ||
|  | 				case 2: | ||
|  | 					_state = STATE.TOUCH_ZOOM_PAN; | ||
|  | 
 | ||
|  | 					for ( let i = 0; i < _pointers.length; i ++ ) { | ||
|  | 
 | ||
|  | 						if ( _pointers[ i ].pointerId !== event.pointerId ) { | ||
|  | 
 | ||
|  | 							const position = _pointerPositions[ _pointers[ i ].pointerId ]; | ||
|  | 							_moveCurr.copy( getMouseOnCircle( position.x, position.y ) ); | ||
|  | 							_movePrev.copy( _moveCurr ); | ||
|  | 							break; | ||
|  | 
 | ||
|  | 						} | ||
|  | 
 | ||
|  | 					} | ||
|  | 
 | ||
|  | 					break; | ||
|  | 
 | ||
|  | 			} | ||
|  | 
 | ||
|  | 			scope.dispatchEvent( _endEvent ); | ||
|  | 
 | ||
|  | 		} | ||
|  | 
 | ||
|  | 		function contextmenu( 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 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 ]; | ||
|  | 
 | ||
|  | 		} | ||
|  | 
 | ||
|  | 		this.dispose = function () { | ||
|  | 
 | ||
|  | 			scope.domElement.removeEventListener( 'contextmenu', contextmenu ); | ||
|  | 
 | ||
|  | 			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 ); | ||
|  | 
 | ||
|  | 			window.removeEventListener( 'keydown', keydown ); | ||
|  | 			window.removeEventListener( 'keyup', keyup ); | ||
|  | 
 | ||
|  | 		}; | ||
|  | 
 | ||
|  | 		this.domElement.addEventListener( 'contextmenu', contextmenu ); | ||
|  | 
 | ||
|  | 		this.domElement.addEventListener( 'pointerdown', onPointerDown ); | ||
|  | 		this.domElement.addEventListener( 'pointercancel', onPointerCancel ); | ||
|  | 		this.domElement.addEventListener( 'wheel', onMouseWheel, { passive: false } ); | ||
|  | 
 | ||
|  | 
 | ||
|  | 		window.addEventListener( 'keydown', keydown ); | ||
|  | 		window.addEventListener( 'keyup', keyup ); | ||
|  | 
 | ||
|  | 		this.handleResize(); | ||
|  | 
 | ||
|  | 		// force an update at start
 | ||
|  | 		this.update(); | ||
|  | 
 | ||
|  | 	} | ||
|  | 
 | ||
|  | } | ||
|  | 
 | ||
|  | export { TrackballControls }; |