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| /** | |
| * @author Eberhard Graether / http://egraether.com/ | |
| * @author Mark Lundin / http://mark-lundin.com | |
| * @author Simone Manini / http://daron1337.github.io | |
| * @author Luca Antiga / http://lantiga.github.io | |
| */ | |
| import { | |
| EventDispatcher, | |
| Quaternion, | |
| Vector2, | |
| Vector3 | |
| } from "../../../build/three.module.js"; | |
| var TrackballControls = function ( object, domElement ) { | |
| var _this = this; | |
| var STATE = { NONE: - 1, ROTATE: 0, ZOOM: 1, PAN: 2, TOUCH_ROTATE: 3, TOUCH_ZOOM_PAN: 4 }; | |
| this.object = object; | |
| this.domElement = ( domElement !== undefined ) ? domElement : document; | |
| // 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 = [ 65 /*A*/, 83 /*S*/, 68 /*D*/ ]; | |
| // internals | |
| this.target = new Vector3(); | |
| var EPS = 0.000001; | |
| var lastPosition = new Vector3(); | |
| var _state = STATE.NONE, | |
| _prevState = STATE.NONE, | |
| _eye = new Vector3(), | |
| _movePrev = new Vector2(), | |
| _moveCurr = new Vector2(), | |
| _lastAxis = new Vector3(), | |
| _lastAngle = 0, | |
| _zoomStart = new Vector2(), | |
| _zoomEnd = new Vector2(), | |
| _touchZoomDistanceStart = 0, | |
| _touchZoomDistanceEnd = 0, | |
| _panStart = new Vector2(), | |
| _panEnd = new Vector2(); | |
| // for reset | |
| this.target0 = this.target.clone(); | |
| this.position0 = this.object.position.clone(); | |
| this.up0 = this.object.up.clone(); | |
| // events | |
| var changeEvent = { type: 'change' }; | |
| var startEvent = { type: 'start' }; | |
| var endEvent = { type: 'end' }; | |
| // methods | |
| this.handleResize = function () { | |
| if ( this.domElement === document ) { | |
| this.screen.left = 0; | |
| this.screen.top = 0; | |
| this.screen.width = window.innerWidth; | |
| this.screen.height = window.innerHeight; | |
| } else { | |
| var box = this.domElement.getBoundingClientRect(); | |
| // adjustments come from similar code in the jquery offset() function | |
| var d = this.domElement.ownerDocument.documentElement; | |
| this.screen.left = box.left + window.pageXOffset - d.clientLeft; | |
| this.screen.top = box.top + window.pageYOffset - d.clientTop; | |
| this.screen.width = box.width; | |
| this.screen.height = box.height; | |
| } | |
| }; | |
| var getMouseOnScreen = ( function () { | |
| var vector = new Vector2(); | |
| return function getMouseOnScreen( pageX, pageY ) { | |
| vector.set( | |
| ( pageX - _this.screen.left ) / _this.screen.width, | |
| ( pageY - _this.screen.top ) / _this.screen.height | |
| ); | |
| return vector; | |
| }; | |
| }() ); | |
| var getMouseOnCircle = ( function () { | |
| var vector = new Vector2(); | |
| return function getMouseOnCircle( pageX, pageY ) { | |
| vector.set( | |
| ( ( pageX - _this.screen.width * 0.5 - _this.screen.left ) / ( _this.screen.width * 0.5 ) ), | |
| ( ( _this.screen.height + 2 * ( _this.screen.top - pageY ) ) / _this.screen.width ) // screen.width intentional | |
| ); | |
| return vector; | |
| }; | |
| }() ); | |
| this.rotateCamera = ( function () { | |
| var axis = new Vector3(), | |
| quaternion = new Quaternion(), | |
| eyeDirection = new Vector3(), | |
| objectUpDirection = new Vector3(), | |
| objectSidewaysDirection = new Vector3(), | |
| moveDirection = new Vector3(), | |
| angle; | |
| return function rotateCamera() { | |
| moveDirection.set( _moveCurr.x - _movePrev.x, _moveCurr.y - _movePrev.y, 0 ); | |
| angle = moveDirection.length(); | |
| if ( angle ) { | |
| _eye.copy( _this.object.position ).sub( _this.target ); | |
| eyeDirection.copy( _eye ).normalize(); | |
| objectUpDirection.copy( _this.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 *= _this.rotateSpeed; | |
| quaternion.setFromAxisAngle( axis, angle ); | |
| _eye.applyQuaternion( quaternion ); | |
| _this.object.up.applyQuaternion( quaternion ); | |
| _lastAxis.copy( axis ); | |
| _lastAngle = angle; | |
| } else if ( ! _this.staticMoving && _lastAngle ) { | |
| _lastAngle *= Math.sqrt( 1.0 - _this.dynamicDampingFactor ); | |
| _eye.copy( _this.object.position ).sub( _this.target ); | |
| quaternion.setFromAxisAngle( _lastAxis, _lastAngle ); | |
| _eye.applyQuaternion( quaternion ); | |
| _this.object.up.applyQuaternion( quaternion ); | |
| } | |
| _movePrev.copy( _moveCurr ); | |
| }; | |
| }() ); | |
| this.zoomCamera = function () { | |
| var factor; | |
| if ( _state === STATE.TOUCH_ZOOM_PAN ) { | |
| factor = _touchZoomDistanceStart / _touchZoomDistanceEnd; | |
| _touchZoomDistanceStart = _touchZoomDistanceEnd; | |
| _eye.multiplyScalar( factor ); | |
| } else { | |
| factor = 1.0 + ( _zoomEnd.y - _zoomStart.y ) * _this.zoomSpeed; | |
| if ( factor !== 1.0 && factor > 0.0 ) { | |
| _eye.multiplyScalar( factor ); | |
| } | |
| if ( _this.staticMoving ) { | |
| _zoomStart.copy( _zoomEnd ); | |
| } else { | |
| _zoomStart.y += ( _zoomEnd.y - _zoomStart.y ) * this.dynamicDampingFactor; | |
| } | |
| } | |
| }; | |
| this.panCamera = ( function () { | |
| var mouseChange = new Vector2(), | |
| objectUp = new Vector3(), | |
| pan = new Vector3(); | |
| return function panCamera() { | |
| mouseChange.copy( _panEnd ).sub( _panStart ); | |
| if ( mouseChange.lengthSq() ) { | |
| mouseChange.multiplyScalar( _eye.length() * _this.panSpeed ); | |
| pan.copy( _eye ).cross( _this.object.up ).setLength( mouseChange.x ); | |
| pan.add( objectUp.copy( _this.object.up ).setLength( mouseChange.y ) ); | |
| _this.object.position.add( pan ); | |
| _this.target.add( pan ); | |
| if ( _this.staticMoving ) { | |
| _panStart.copy( _panEnd ); | |
| } else { | |
| _panStart.add( mouseChange.subVectors( _panEnd, _panStart ).multiplyScalar( _this.dynamicDampingFactor ) ); | |
| } | |
| } | |
| }; | |
| }() ); | |
| this.checkDistances = function () { | |
| if ( ! _this.noZoom || ! _this.noPan ) { | |
| if ( _eye.lengthSq() > _this.maxDistance * _this.maxDistance ) { | |
| _this.object.position.addVectors( _this.target, _eye.setLength( _this.maxDistance ) ); | |
| _zoomStart.copy( _zoomEnd ); | |
| } | |
| if ( _eye.lengthSq() < _this.minDistance * _this.minDistance ) { | |
| _this.object.position.addVectors( _this.target, _eye.setLength( _this.minDistance ) ); | |
| _zoomStart.copy( _zoomEnd ); | |
| } | |
| } | |
| }; | |
| this.update = function () { | |
| _eye.subVectors( _this.object.position, _this.target ); | |
| if ( ! _this.noRotate ) { | |
| _this.rotateCamera(); | |
| } | |
| if ( ! _this.noZoom ) { | |
| _this.zoomCamera(); | |
| } | |
| if ( ! _this.noPan ) { | |
| _this.panCamera(); | |
| } | |
| _this.object.position.addVectors( _this.target, _eye ); | |
| _this.checkDistances(); | |
| _this.object.lookAt( _this.target ); | |
| if ( lastPosition.distanceToSquared( _this.object.position ) > EPS ) { | |
| _this.dispatchEvent( changeEvent ); | |
| lastPosition.copy( _this.object.position ); | |
| } | |
| }; | |
| this.reset = function () { | |
| _state = STATE.NONE; | |
| _prevState = STATE.NONE; | |
| _this.target.copy( _this.target0 ); | |
| _this.object.position.copy( _this.position0 ); | |
| _this.object.up.copy( _this.up0 ); | |
| _eye.subVectors( _this.object.position, _this.target ); | |
| _this.object.lookAt( _this.target ); | |
| _this.dispatchEvent( changeEvent ); | |
| lastPosition.copy( _this.object.position ); | |
| }; | |
| // listeners | |
| function keydown( event ) { | |
| if ( _this.enabled === false ) return; | |
| window.removeEventListener( 'keydown', keydown ); | |
| _prevState = _state; | |
| if ( _state !== STATE.NONE ) { | |
| return; | |
| } else if ( event.keyCode === _this.keys[ STATE.ROTATE ] && ! _this.noRotate ) { | |
| _state = STATE.ROTATE; | |
| } else if ( event.keyCode === _this.keys[ STATE.ZOOM ] && ! _this.noZoom ) { | |
| _state = STATE.ZOOM; | |
| } else if ( event.keyCode === _this.keys[ STATE.PAN ] && ! _this.noPan ) { | |
| _state = STATE.PAN; | |
| } | |
| } | |
| function keyup( event ) { | |
| if ( _this.enabled === false ) return; | |
| _state = _prevState; | |
| window.addEventListener( 'keydown', keydown, false ); | |
| } | |
| function mousedown( event ) { | |
| if ( _this.enabled === false ) return; | |
| event.preventDefault(); | |
| event.stopPropagation(); | |
| if ( _state === STATE.NONE ) { | |
| _state = event.button; | |
| } | |
| if ( _state === STATE.ROTATE && ! _this.noRotate ) { | |
| _moveCurr.copy( getMouseOnCircle( event.pageX, event.pageY ) ); | |
| _movePrev.copy( _moveCurr ); | |
| } else if ( _state === STATE.ZOOM && ! _this.noZoom ) { | |
| _zoomStart.copy( getMouseOnScreen( event.pageX, event.pageY ) ); | |
| _zoomEnd.copy( _zoomStart ); | |
| } else if ( _state === STATE.PAN && ! _this.noPan ) { | |
| _panStart.copy( getMouseOnScreen( event.pageX, event.pageY ) ); | |
| _panEnd.copy( _panStart ); | |
| } | |
| document.addEventListener( 'mousemove', mousemove, false ); | |
| document.addEventListener( 'mouseup', mouseup, false ); | |
| _this.dispatchEvent( startEvent ); | |
| } | |
| function mousemove( event ) { | |
| if ( _this.enabled === false ) return; | |
| event.preventDefault(); | |
| event.stopPropagation(); | |
| if ( _state === STATE.ROTATE && ! _this.noRotate ) { | |
| _movePrev.copy( _moveCurr ); | |
| _moveCurr.copy( getMouseOnCircle( event.pageX, event.pageY ) ); | |
| } else if ( _state === STATE.ZOOM && ! _this.noZoom ) { | |
| _zoomEnd.copy( getMouseOnScreen( event.pageX, event.pageY ) ); | |
| } else if ( _state === STATE.PAN && ! _this.noPan ) { | |
| _panEnd.copy( getMouseOnScreen( event.pageX, event.pageY ) ); | |
| } | |
| } | |
| function mouseup( event ) { | |
| if ( _this.enabled === false ) return; | |
| event.preventDefault(); | |
| event.stopPropagation(); | |
| _state = STATE.NONE; | |
| document.removeEventListener( 'mousemove', mousemove ); | |
| document.removeEventListener( 'mouseup', mouseup ); | |
| _this.dispatchEvent( endEvent ); | |
| } | |
| function mousewheel( event ) { | |
| if ( _this.enabled === false ) return; | |
| if ( _this.noZoom === true ) return; | |
| event.preventDefault(); | |
| event.stopPropagation(); | |
| 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; | |
| } | |
| _this.dispatchEvent( startEvent ); | |
| _this.dispatchEvent( endEvent ); | |
| } | |
| function touchstart( event ) { | |
| if ( _this.enabled === false ) return; | |
| event.preventDefault(); | |
| switch ( event.touches.length ) { | |
| case 1: | |
| _state = STATE.TOUCH_ROTATE; | |
| _moveCurr.copy( getMouseOnCircle( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) ); | |
| _movePrev.copy( _moveCurr ); | |
| break; | |
| default: // 2 or more | |
| _state = STATE.TOUCH_ZOOM_PAN; | |
| var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX; | |
| var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY; | |
| _touchZoomDistanceEnd = _touchZoomDistanceStart = Math.sqrt( dx * dx + dy * dy ); | |
| var x = ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX ) / 2; | |
| var y = ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY ) / 2; | |
| _panStart.copy( getMouseOnScreen( x, y ) ); | |
| _panEnd.copy( _panStart ); | |
| break; | |
| } | |
| _this.dispatchEvent( startEvent ); | |
| } | |
| function touchmove( event ) { | |
| if ( _this.enabled === false ) return; | |
| event.preventDefault(); | |
| event.stopPropagation(); | |
| switch ( event.touches.length ) { | |
| case 1: | |
| _movePrev.copy( _moveCurr ); | |
| _moveCurr.copy( getMouseOnCircle( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) ); | |
| break; | |
| default: // 2 or more | |
| var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX; | |
| var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY; | |
| _touchZoomDistanceEnd = Math.sqrt( dx * dx + dy * dy ); | |
| var x = ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX ) / 2; | |
| var y = ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY ) / 2; | |
| _panEnd.copy( getMouseOnScreen( x, y ) ); | |
| break; | |
| } | |
| } | |
| function touchend( event ) { | |
| if ( _this.enabled === false ) return; | |
| switch ( event.touches.length ) { | |
| case 0: | |
| _state = STATE.NONE; | |
| break; | |
| case 1: | |
| _state = STATE.TOUCH_ROTATE; | |
| _moveCurr.copy( getMouseOnCircle( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) ); | |
| _movePrev.copy( _moveCurr ); | |
| break; | |
| } | |
| _this.dispatchEvent( endEvent ); | |
| } | |
| function contextmenu( event ) { | |
| if ( _this.enabled === false ) return; | |
| event.preventDefault(); | |
| } | |
| this.dispose = function () { | |
| this.domElement.removeEventListener( 'contextmenu', contextmenu, false ); | |
| this.domElement.removeEventListener( 'mousedown', mousedown, false ); | |
| this.domElement.removeEventListener( 'wheel', mousewheel, false ); | |
| this.domElement.removeEventListener( 'touchstart', touchstart, false ); | |
| this.domElement.removeEventListener( 'touchend', touchend, false ); | |
| this.domElement.removeEventListener( 'touchmove', touchmove, false ); | |
| document.removeEventListener( 'mousemove', mousemove, false ); | |
| document.removeEventListener( 'mouseup', mouseup, false ); | |
| window.removeEventListener( 'keydown', keydown, false ); | |
| window.removeEventListener( 'keyup', keyup, false ); | |
| }; | |
| this.domElement.addEventListener( 'contextmenu', contextmenu, false ); | |
| this.domElement.addEventListener( 'mousedown', mousedown, false ); | |
| this.domElement.addEventListener( 'wheel', mousewheel, false ); | |
| this.domElement.addEventListener( 'touchstart', touchstart, false ); | |
| this.domElement.addEventListener( 'touchend', touchend, false ); | |
| this.domElement.addEventListener( 'touchmove', touchmove, false ); | |
| window.addEventListener( 'keydown', keydown, false ); | |
| window.addEventListener( 'keyup', keyup, false ); | |
| this.handleResize(); | |
| // force an update at start | |
| this.update(); | |
| }; | |
| TrackballControls.prototype = Object.create( EventDispatcher.prototype ); | |
| TrackballControls.prototype.constructor = TrackballControls; | |
| export { TrackballControls }; | |