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| /** | |
| * @author Eberhard Graether / http://egraether.com/ | |
| * @author Mark Lundin / http://mark-lundin.com | |
| * @author Patrick Fuller / http://patrick-fuller.com | |
| * @author Max Smolens / https://github.com/msmolens | |
| */ | |
| THREE.OrthographicTrackballControls = 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.radius = 0; | |
| this.rotateSpeed = 1.0; | |
| this.zoomSpeed = 1.2; | |
| this.noRotate = false; | |
| this.noZoom = false; | |
| this.noPan = false; | |
| this.noRoll = false; | |
| this.staticMoving = false; | |
| this.dynamicDampingFactor = 0.2; | |
| this.keys = [ 65 /*A*/, 83 /*S*/, 68 /*D*/ ]; | |
| // internals | |
| this.target = new THREE.Vector3(); | |
| var EPS = 0.000001; | |
| var _changed = true; | |
| var _state = STATE.NONE, | |
| _prevState = STATE.NONE, | |
| _eye = new THREE.Vector3(), | |
| _rotateStart = new THREE.Vector3(), | |
| _rotateEnd = new THREE.Vector3(), | |
| _zoomStart = new THREE.Vector2(), | |
| _zoomEnd = new THREE.Vector2(), | |
| _touchZoomDistanceStart = 0, | |
| _touchZoomDistanceEnd = 0, | |
| _panStart = new THREE.Vector2(), | |
| _panEnd = new THREE.Vector2(); | |
| // for reset | |
| this.target0 = this.target.clone(); | |
| this.position0 = this.object.position.clone(); | |
| this.up0 = this.object.up.clone(); | |
| this.left0 = this.object.left; | |
| this.right0 = this.object.right; | |
| this.top0 = this.object.top; | |
| this.bottom0 = this.object.bottom; | |
| // 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; | |
| } | |
| this.radius = 0.5 * Math.min( this.screen.width, this.screen.height ); | |
| this.left0 = this.object.left; | |
| this.right0 = this.object.right; | |
| this.top0 = this.object.top; | |
| this.bottom0 = this.object.bottom; | |
| }; | |
| var getMouseOnScreen = ( function () { | |
| var vector = new THREE.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 getMouseProjectionOnBall = ( function () { | |
| var vector = new THREE.Vector3(); | |
| var objectUp = new THREE.Vector3(); | |
| var mouseOnBall = new THREE.Vector3(); | |
| return function getMouseProjectionOnBall( pageX, pageY ) { | |
| mouseOnBall.set( | |
| ( pageX - _this.screen.width * 0.5 - _this.screen.left ) / _this.radius, | |
| ( _this.screen.height * 0.5 + _this.screen.top - pageY ) / _this.radius, | |
| 0.0 | |
| ); | |
| var length = mouseOnBall.length(); | |
| if ( _this.noRoll ) { | |
| if ( length < Math.SQRT1_2 ) { | |
| mouseOnBall.z = Math.sqrt( 1.0 - length * length ); | |
| } else { | |
| mouseOnBall.z = .5 / length; | |
| } | |
| } else if ( length > 1.0 ) { | |
| mouseOnBall.normalize(); | |
| } else { | |
| mouseOnBall.z = Math.sqrt( 1.0 - length * length ); | |
| } | |
| _eye.copy( _this.object.position ).sub( _this.target ); | |
| vector.copy( _this.object.up ).setLength( mouseOnBall.y ); | |
| vector.add( objectUp.copy( _this.object.up ).cross( _eye ).setLength( mouseOnBall.x ) ); | |
| vector.add( _eye.setLength( mouseOnBall.z ) ); | |
| return vector; | |
| }; | |
| }() ); | |
| this.rotateCamera = ( function () { | |
| var axis = new THREE.Vector3(), | |
| quaternion = new THREE.Quaternion(); | |
| return function rotateCamera() { | |
| var angle = Math.acos( _rotateStart.dot( _rotateEnd ) / _rotateStart.length() / _rotateEnd.length() ); | |
| if ( angle ) { | |
| axis.crossVectors( _rotateStart, _rotateEnd ).normalize(); | |
| angle *= _this.rotateSpeed; | |
| quaternion.setFromAxisAngle( axis, - angle ); | |
| _eye.applyQuaternion( quaternion ); | |
| _this.object.up.applyQuaternion( quaternion ); | |
| _rotateEnd.applyQuaternion( quaternion ); | |
| if ( _this.staticMoving ) { | |
| _rotateStart.copy( _rotateEnd ); | |
| } else { | |
| quaternion.setFromAxisAngle( axis, angle * ( _this.dynamicDampingFactor - 1.0 ) ); | |
| _rotateStart.applyQuaternion( quaternion ); | |
| } | |
| _changed = true; | |
| } | |
| }; | |
| }() ); | |
| this.zoomCamera = function () { | |
| if ( _state === STATE.TOUCH_ZOOM_PAN ) { | |
| var factor = _touchZoomDistanceEnd / _touchZoomDistanceStart; | |
| _touchZoomDistanceStart = _touchZoomDistanceEnd; | |
| _this.object.zoom *= factor; | |
| _changed = true; | |
| } else { | |
| var factor = 1.0 + ( _zoomEnd.y - _zoomStart.y ) * _this.zoomSpeed; | |
| if ( Math.abs( factor - 1.0 ) > EPS && factor > 0.0 ) { | |
| _this.object.zoom /= factor; | |
| if ( _this.staticMoving ) { | |
| _zoomStart.copy( _zoomEnd ); | |
| } else { | |
| _zoomStart.y += ( _zoomEnd.y - _zoomStart.y ) * this.dynamicDampingFactor; | |
| } | |
| _changed = true; | |
| } | |
| } | |
| }; | |
| this.panCamera = ( function () { | |
| var mouseChange = new THREE.Vector2(), | |
| objectUp = new THREE.Vector3(), | |
| pan = new THREE.Vector3(); | |
| return function panCamera() { | |
| mouseChange.copy( _panEnd ).sub( _panStart ); | |
| if ( mouseChange.lengthSq() ) { | |
| // Scale movement to keep clicked/dragged position under cursor | |
| var scale_x = ( _this.object.right - _this.object.left ) / _this.object.zoom; | |
| var scale_y = ( _this.object.top - _this.object.bottom ) / _this.object.zoom; | |
| mouseChange.x *= scale_x; | |
| mouseChange.y *= scale_y; | |
| 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 ) ); | |
| } | |
| _changed = true; | |
| } | |
| }; | |
| }() ); | |
| this.update = function () { | |
| _eye.subVectors( _this.object.position, _this.target ); | |
| if ( ! _this.noRotate ) { | |
| _this.rotateCamera(); | |
| } | |
| if ( ! _this.noZoom ) { | |
| _this.zoomCamera(); | |
| if ( _changed ) { | |
| _this.object.updateProjectionMatrix(); | |
| } | |
| } | |
| if ( ! _this.noPan ) { | |
| _this.panCamera(); | |
| } | |
| _this.object.position.addVectors( _this.target, _eye ); | |
| _this.object.lookAt( _this.target ); | |
| if ( _changed ) { | |
| _this.dispatchEvent( changeEvent ); | |
| _changed = false; | |
| } | |
| }; | |
| 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.left = _this.left0; | |
| _this.object.right = _this.right0; | |
| _this.object.top = _this.top0; | |
| _this.object.bottom = _this.bottom0; | |
| _this.object.lookAt( _this.target ); | |
| _this.dispatchEvent( changeEvent ); | |
| _changed = false; | |
| }; | |
| // 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 ) { | |
| _rotateStart.copy( getMouseProjectionOnBall( event.pageX, event.pageY ) ); | |
| _rotateEnd.copy( _rotateStart ); | |
| } 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 ) { | |
| _rotateEnd.copy( getMouseProjectionOnBall( 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; | |
| event.preventDefault(); | |
| event.stopPropagation(); | |
| _zoomStart.y += event.deltaY * 0.01; | |
| _this.dispatchEvent( startEvent ); | |
| _this.dispatchEvent( endEvent ); | |
| } | |
| function touchstart( event ) { | |
| if ( _this.enabled === false ) return; | |
| switch ( event.touches.length ) { | |
| case 1: | |
| _state = STATE.TOUCH_ROTATE; | |
| _rotateStart.copy( getMouseProjectionOnBall( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) ); | |
| _rotateEnd.copy( _rotateStart ); | |
| break; | |
| case 2: | |
| _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; | |
| default: | |
| _state = STATE.NONE; | |
| } | |
| _this.dispatchEvent( startEvent ); | |
| } | |
| function touchmove( event ) { | |
| if ( _this.enabled === false ) return; | |
| event.preventDefault(); | |
| event.stopPropagation(); | |
| switch ( event.touches.length ) { | |
| case 1: | |
| _rotateEnd.copy( getMouseProjectionOnBall( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) ); | |
| break; | |
| case 2: | |
| 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; | |
| default: | |
| _state = STATE.NONE; | |
| } | |
| } | |
| function touchend( event ) { | |
| if ( _this.enabled === false ) return; | |
| switch ( event.touches.length ) { | |
| case 1: | |
| _rotateEnd.copy( getMouseProjectionOnBall( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) ); | |
| _rotateStart.copy( _rotateEnd ); | |
| break; | |
| case 2: | |
| _touchZoomDistanceStart = _touchZoomDistanceEnd = 0; | |
| 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 ) ); | |
| _panStart.copy( _panEnd ); | |
| break; | |
| } | |
| _state = STATE.NONE; | |
| _this.dispatchEvent( endEvent ); | |
| } | |
| function contextmenu( event ) { | |
| 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(); | |
| }; | |
| THREE.OrthographicTrackballControls.prototype = Object.create( THREE.EventDispatcher.prototype ); | |
| THREE.OrthographicTrackballControls.prototype.constructor = THREE.OrthographicTrackballControls; | |