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| ( function () { | |
| const _changeEvent = { | |
| type: 'change' | |
| }; | |
| const _startEvent = { | |
| type: 'start' | |
| }; | |
| const _endEvent = { | |
| type: 'end' | |
| }; | |
| class TrackballControls extends THREE.EventDispatcher { | |
| constructor( object, domElement ) { | |
| super(); | |
| if ( domElement === undefined ) console.warn( 'THREE.TrackballControls: The second parameter "domElement" is now mandatory.' ); | |
| if ( domElement === document ) console.error( 'THREE.TrackballControls: "document" should not be used as the target "domElement". Please use "renderer.domElement" instead.' ); | |
| 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.keys = [ 'KeyA', | |
| /*A*/ | |
| 'KeyS', | |
| /*S*/ | |
| 'KeyD' | |
| /*D*/ | |
| ]; | |
| this.mouseButtons = { | |
| LEFT: THREE.MOUSE.ROTATE, | |
| MIDDLE: THREE.MOUSE.DOLLY, | |
| RIGHT: THREE.MOUSE.PAN | |
| }; // internals | |
| this.target = new THREE.Vector3(); | |
| const EPS = 0.000001; | |
| const lastPosition = new THREE.Vector3(); | |
| let lastZoom = 1; | |
| let _state = STATE.NONE, | |
| _keyState = STATE.NONE, | |
| _touchZoomDistanceStart = 0, | |
| _touchZoomDistanceEnd = 0, | |
| _lastAngle = 0; | |
| const _eye = new THREE.Vector3(), | |
| _movePrev = new THREE.Vector2(), | |
| _moveCurr = new THREE.Vector2(), | |
| _lastAxis = new THREE.Vector3(), | |
| _zoomStart = new THREE.Vector2(), | |
| _zoomEnd = new THREE.Vector2(), | |
| _panStart = new THREE.Vector2(), | |
| _panEnd = new THREE.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 THREE.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 THREE.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 THREE.Vector3(), | |
| quaternion = new THREE.Quaternion(), | |
| eyeDirection = new THREE.Vector3(), | |
| objectUpDirection = new THREE.Vector3(), | |
| objectSidewaysDirection = new THREE.Vector3(), | |
| moveDirection = new THREE.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 *= factor; | |
| 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 /= factor; | |
| 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 THREE.Vector2(), | |
| objectUp = new THREE.Vector3(), | |
| pan = new THREE.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.ownerDocument.addEventListener( 'pointermove', onPointerMove ); | |
| scope.domElement.ownerDocument.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.ownerDocument.removeEventListener( 'pointermove', onPointerMove ); | |
| scope.domElement.ownerDocument.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; | |
| default: | |
| _state = STATE.NONE; | |
| } | |
| } | |
| 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.domElement.ownerDocument.addEventListener( 'pointermove', onPointerMove ); | |
| scope.domElement.ownerDocument.addEventListener( 'pointerup', onPointerUp ); | |
| 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.domElement.ownerDocument.removeEventListener( 'pointermove', onPointerMove ); | |
| scope.domElement.ownerDocument.removeEventListener( 'pointerup', onPointerUp ); | |
| 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; | |
| } | |
| 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 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 ]; | |
| } | |
| this.dispose = function () { | |
| scope.domElement.removeEventListener( 'contextmenu', contextmenu ); | |
| scope.domElement.removeEventListener( 'pointerdown', onPointerDown ); | |
| scope.domElement.removeEventListener( 'pointercancel', onPointerCancel ); | |
| scope.domElement.removeEventListener( 'wheel', onMouseWheel ); | |
| 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(); | |
| } | |
| } | |
| THREE.TrackballControls = TrackballControls; | |
| } )(); |