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744 lines
16 KiB
744 lines
16 KiB
THREE.TrackballControls = function ( object, domElement ) { |
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if ( domElement === undefined ) console.warn( 'THREE.TrackballControls: The second parameter "domElement" is now mandatory.' ); |
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if ( domElement === document ) console.error( 'THREE.TrackballControls: "document" should not be used as the target "domElement". Please use "renderer.domElement" instead.' ); |
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var scope = this; |
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var STATE = { NONE: - 1, ROTATE: 0, ZOOM: 1, PAN: 2, TOUCH_ROTATE: 3, TOUCH_ZOOM_PAN: 4 }; |
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this.object = object; |
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this.domElement = domElement; |
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// API |
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this.enabled = true; |
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this.screen = { left: 0, top: 0, width: 0, height: 0 }; |
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this.rotateSpeed = 1.0; |
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this.zoomSpeed = 1.2; |
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this.panSpeed = 0.3; |
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this.noRotate = false; |
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this.noZoom = false; |
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this.noPan = false; |
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this.staticMoving = false; |
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this.dynamicDampingFactor = 0.2; |
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this.minDistance = 0; |
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this.maxDistance = Infinity; |
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this.keys = [ 65 /*A*/, 83 /*S*/, 68 /*D*/ ]; |
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this.mouseButtons = { LEFT: THREE.MOUSE.ROTATE, MIDDLE: THREE.MOUSE.DOLLY, RIGHT: THREE.MOUSE.PAN }; |
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// internals |
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this.target = new THREE.Vector3(); |
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var EPS = 0.000001; |
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var lastPosition = new THREE.Vector3(); |
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var lastZoom = 1; |
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var _state = STATE.NONE, |
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_keyState = STATE.NONE, |
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_eye = new THREE.Vector3(), |
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_movePrev = new THREE.Vector2(), |
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_moveCurr = new THREE.Vector2(), |
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_lastAxis = new THREE.Vector3(), |
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_lastAngle = 0, |
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_zoomStart = new THREE.Vector2(), |
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_zoomEnd = new THREE.Vector2(), |
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_touchZoomDistanceStart = 0, |
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_touchZoomDistanceEnd = 0, |
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_panStart = new THREE.Vector2(), |
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_panEnd = new THREE.Vector2(); |
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// for reset |
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this.target0 = this.target.clone(); |
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this.position0 = this.object.position.clone(); |
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this.up0 = this.object.up.clone(); |
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this.zoom0 = this.object.zoom; |
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// events |
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var changeEvent = { type: 'change' }; |
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var startEvent = { type: 'start' }; |
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var endEvent = { type: 'end' }; |
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// methods |
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this.handleResize = function () { |
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var box = scope.domElement.getBoundingClientRect(); |
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// adjustments come from similar code in the jquery offset() function |
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var d = scope.domElement.ownerDocument.documentElement; |
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scope.screen.left = box.left + window.pageXOffset - d.clientLeft; |
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scope.screen.top = box.top + window.pageYOffset - d.clientTop; |
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scope.screen.width = box.width; |
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scope.screen.height = box.height; |
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}; |
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var getMouseOnScreen = ( function () { |
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var vector = new THREE.Vector2(); |
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return function getMouseOnScreen( pageX, pageY ) { |
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vector.set( |
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( pageX - scope.screen.left ) / scope.screen.width, |
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( pageY - scope.screen.top ) / scope.screen.height |
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); |
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return vector; |
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}; |
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}() ); |
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var getMouseOnCircle = ( function () { |
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var vector = new THREE.Vector2(); |
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return function getMouseOnCircle( pageX, pageY ) { |
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vector.set( |
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( ( pageX - scope.screen.width * 0.5 - scope.screen.left ) / ( scope.screen.width * 0.5 ) ), |
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( ( scope.screen.height + 2 * ( scope.screen.top - pageY ) ) / scope.screen.width ) // screen.width intentional |
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); |
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return vector; |
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}; |
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}() ); |
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this.rotateCamera = ( function () { |
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var axis = new THREE.Vector3(), |
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quaternion = new THREE.Quaternion(), |
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eyeDirection = new THREE.Vector3(), |
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objectUpDirection = new THREE.Vector3(), |
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objectSidewaysDirection = new THREE.Vector3(), |
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moveDirection = new THREE.Vector3(), |
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angle; |
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return function rotateCamera() { |
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moveDirection.set( _moveCurr.x - _movePrev.x, _moveCurr.y - _movePrev.y, 0 ); |
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angle = moveDirection.length(); |
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if ( angle ) { |
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_eye.copy( scope.object.position ).sub( scope.target ); |
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eyeDirection.copy( _eye ).normalize(); |
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objectUpDirection.copy( scope.object.up ).normalize(); |
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objectSidewaysDirection.crossVectors( objectUpDirection, eyeDirection ).normalize(); |
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objectUpDirection.setLength( _moveCurr.y - _movePrev.y ); |
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objectSidewaysDirection.setLength( _moveCurr.x - _movePrev.x ); |
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moveDirection.copy( objectUpDirection.add( objectSidewaysDirection ) ); |
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axis.crossVectors( moveDirection, _eye ).normalize(); |
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angle *= scope.rotateSpeed; |
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quaternion.setFromAxisAngle( axis, angle ); |
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_eye.applyQuaternion( quaternion ); |
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scope.object.up.applyQuaternion( quaternion ); |
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_lastAxis.copy( axis ); |
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_lastAngle = angle; |
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} else if ( ! scope.staticMoving && _lastAngle ) { |
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_lastAngle *= Math.sqrt( 1.0 - scope.dynamicDampingFactor ); |
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_eye.copy( scope.object.position ).sub( scope.target ); |
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quaternion.setFromAxisAngle( _lastAxis, _lastAngle ); |
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_eye.applyQuaternion( quaternion ); |
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scope.object.up.applyQuaternion( quaternion ); |
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} |
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_movePrev.copy( _moveCurr ); |
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}; |
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}() ); |
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this.zoomCamera = function () { |
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var factor; |
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if ( _state === STATE.TOUCH_ZOOM_PAN ) { |
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factor = _touchZoomDistanceStart / _touchZoomDistanceEnd; |
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_touchZoomDistanceStart = _touchZoomDistanceEnd; |
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if ( scope.object.isPerspectiveCamera ) { |
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_eye.multiplyScalar( factor ); |
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} else if ( scope.object.isOrthographicCamera ) { |
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scope.object.zoom *= factor; |
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scope.object.updateProjectionMatrix(); |
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} else { |
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console.warn( 'THREE.TrackballControls: Unsupported camera type' ); |
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} |
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} else { |
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factor = 1.0 + ( _zoomEnd.y - _zoomStart.y ) * scope.zoomSpeed; |
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if ( factor !== 1.0 && factor > 0.0 ) { |
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if ( scope.object.isPerspectiveCamera ) { |
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_eye.multiplyScalar( factor ); |
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} else if ( scope.object.isOrthographicCamera ) { |
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scope.object.zoom /= factor; |
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scope.object.updateProjectionMatrix(); |
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} else { |
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console.warn( 'THREE.TrackballControls: Unsupported camera type' ); |
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} |
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} |
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if ( scope.staticMoving ) { |
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_zoomStart.copy( _zoomEnd ); |
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} else { |
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_zoomStart.y += ( _zoomEnd.y - _zoomStart.y ) * this.dynamicDampingFactor; |
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} |
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} |
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}; |
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this.panCamera = ( function () { |
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var mouseChange = new THREE.Vector2(), |
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objectUp = new THREE.Vector3(), |
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pan = new THREE.Vector3(); |
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return function panCamera() { |
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mouseChange.copy( _panEnd ).sub( _panStart ); |
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if ( mouseChange.lengthSq() ) { |
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if ( scope.object.isOrthographicCamera ) { |
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var scale_x = ( scope.object.right - scope.object.left ) / scope.object.zoom / scope.domElement.clientWidth; |
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var scale_y = ( scope.object.top - scope.object.bottom ) / scope.object.zoom / scope.domElement.clientWidth; |
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mouseChange.x *= scale_x; |
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mouseChange.y *= scale_y; |
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} |
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mouseChange.multiplyScalar( _eye.length() * scope.panSpeed ); |
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pan.copy( _eye ).cross( scope.object.up ).setLength( mouseChange.x ); |
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pan.add( objectUp.copy( scope.object.up ).setLength( mouseChange.y ) ); |
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scope.object.position.add( pan ); |
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scope.target.add( pan ); |
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if ( scope.staticMoving ) { |
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_panStart.copy( _panEnd ); |
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} else { |
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_panStart.add( mouseChange.subVectors( _panEnd, _panStart ).multiplyScalar( scope.dynamicDampingFactor ) ); |
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} |
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} |
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}; |
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}() ); |
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this.checkDistances = function () { |
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if ( ! scope.noZoom || ! scope.noPan ) { |
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if ( _eye.lengthSq() > scope.maxDistance * scope.maxDistance ) { |
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scope.object.position.addVectors( scope.target, _eye.setLength( scope.maxDistance ) ); |
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_zoomStart.copy( _zoomEnd ); |
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} |
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if ( _eye.lengthSq() < scope.minDistance * scope.minDistance ) { |
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scope.object.position.addVectors( scope.target, _eye.setLength( scope.minDistance ) ); |
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_zoomStart.copy( _zoomEnd ); |
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} |
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} |
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}; |
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this.update = function () { |
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_eye.subVectors( scope.object.position, scope.target ); |
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if ( ! scope.noRotate ) { |
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scope.rotateCamera(); |
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} |
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if ( ! scope.noZoom ) { |
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scope.zoomCamera(); |
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} |
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if ( ! scope.noPan ) { |
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scope.panCamera(); |
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} |
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scope.object.position.addVectors( scope.target, _eye ); |
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if ( scope.object.isPerspectiveCamera ) { |
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scope.checkDistances(); |
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scope.object.lookAt( scope.target ); |
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if ( lastPosition.distanceToSquared( scope.object.position ) > EPS ) { |
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scope.dispatchEvent( changeEvent ); |
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lastPosition.copy( scope.object.position ); |
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} |
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} else if ( scope.object.isOrthographicCamera ) { |
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scope.object.lookAt( scope.target ); |
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if ( lastPosition.distanceToSquared( scope.object.position ) > EPS || lastZoom !== scope.object.zoom ) { |
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scope.dispatchEvent( changeEvent ); |
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lastPosition.copy( scope.object.position ); |
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lastZoom = scope.object.zoom; |
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} |
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} else { |
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console.warn( 'THREE.TrackballControls: Unsupported camera type' ); |
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} |
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}; |
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this.reset = function () { |
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_state = STATE.NONE; |
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_keyState = STATE.NONE; |
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scope.target.copy( scope.target0 ); |
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scope.object.position.copy( scope.position0 ); |
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scope.object.up.copy( scope.up0 ); |
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scope.object.zoom = scope.zoom0; |
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scope.object.updateProjectionMatrix(); |
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_eye.subVectors( scope.object.position, scope.target ); |
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scope.object.lookAt( scope.target ); |
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scope.dispatchEvent( changeEvent ); |
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lastPosition.copy( scope.object.position ); |
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lastZoom = scope.object.zoom; |
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}; |
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// listeners |
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function onPointerDown( event ) { |
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if ( scope.enabled === false ) return; |
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switch ( event.pointerType ) { |
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case 'mouse': |
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case 'pen': |
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onMouseDown( event ); |
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break; |
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// TODO touch |
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} |
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} |
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function onPointerMove( event ) { |
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if ( scope.enabled === false ) return; |
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switch ( event.pointerType ) { |
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case 'mouse': |
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case 'pen': |
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onMouseMove( event ); |
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break; |
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// TODO touch |
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} |
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} |
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function onPointerUp( event ) { |
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if ( scope.enabled === false ) return; |
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switch ( event.pointerType ) { |
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case 'mouse': |
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case 'pen': |
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onMouseUp( event ); |
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break; |
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// TODO touch |
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} |
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} |
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function keydown( event ) { |
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if ( scope.enabled === false ) return; |
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window.removeEventListener( 'keydown', keydown ); |
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if ( _keyState !== STATE.NONE ) { |
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return; |
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} else if ( event.keyCode === scope.keys[ STATE.ROTATE ] && ! scope.noRotate ) { |
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_keyState = STATE.ROTATE; |
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} else if ( event.keyCode === scope.keys[ STATE.ZOOM ] && ! scope.noZoom ) { |
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_keyState = STATE.ZOOM; |
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} else if ( event.keyCode === scope.keys[ STATE.PAN ] && ! scope.noPan ) { |
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_keyState = STATE.PAN; |
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} |
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} |
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function keyup() { |
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if ( scope.enabled === false ) return; |
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_keyState = STATE.NONE; |
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window.addEventListener( 'keydown', keydown ); |
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} |
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function onMouseDown( event ) { |
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event.preventDefault(); |
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event.stopPropagation(); |
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if ( _state === STATE.NONE ) { |
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switch ( event.button ) { |
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case scope.mouseButtons.LEFT: |
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_state = STATE.ROTATE; |
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break; |
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case scope.mouseButtons.MIDDLE: |
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_state = STATE.ZOOM; |
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break; |
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case scope.mouseButtons.RIGHT: |
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_state = STATE.PAN; |
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break; |
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default: |
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_state = STATE.NONE; |
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} |
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} |
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var state = ( _keyState !== STATE.NONE ) ? _keyState : _state; |
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if ( state === STATE.ROTATE && ! scope.noRotate ) { |
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_moveCurr.copy( getMouseOnCircle( event.pageX, event.pageY ) ); |
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_movePrev.copy( _moveCurr ); |
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} else if ( state === STATE.ZOOM && ! scope.noZoom ) { |
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_zoomStart.copy( getMouseOnScreen( event.pageX, event.pageY ) ); |
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_zoomEnd.copy( _zoomStart ); |
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} else if ( state === STATE.PAN && ! scope.noPan ) { |
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_panStart.copy( getMouseOnScreen( event.pageX, event.pageY ) ); |
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_panEnd.copy( _panStart ); |
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} |
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scope.domElement.ownerDocument.addEventListener( 'pointermove', onPointerMove ); |
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scope.domElement.ownerDocument.addEventListener( 'pointerup', onPointerUp ); |
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scope.dispatchEvent( startEvent ); |
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} |
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function onMouseMove( event ) { |
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if ( scope.enabled === false ) return; |
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event.preventDefault(); |
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event.stopPropagation(); |
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var state = ( _keyState !== STATE.NONE ) ? _keyState : _state; |
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if ( state === STATE.ROTATE && ! scope.noRotate ) { |
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_movePrev.copy( _moveCurr ); |
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_moveCurr.copy( getMouseOnCircle( event.pageX, event.pageY ) ); |
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} else if ( state === STATE.ZOOM && ! scope.noZoom ) { |
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_zoomEnd.copy( getMouseOnScreen( event.pageX, event.pageY ) ); |
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} else if ( state === STATE.PAN && ! scope.noPan ) { |
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_panEnd.copy( getMouseOnScreen( event.pageX, event.pageY ) ); |
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} |
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} |
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function onMouseUp( event ) { |
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if ( scope.enabled === false ) return; |
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event.preventDefault(); |
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event.stopPropagation(); |
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_state = STATE.NONE; |
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scope.domElement.ownerDocument.removeEventListener( 'pointermove', onPointerMove ); |
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scope.domElement.ownerDocument.removeEventListener( 'pointerup', onPointerUp ); |
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scope.dispatchEvent( endEvent ); |
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} |
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function mousewheel( event ) { |
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if ( scope.enabled === false ) return; |
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if ( scope.noZoom === true ) return; |
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event.preventDefault(); |
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event.stopPropagation(); |
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switch ( event.deltaMode ) { |
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case 2: |
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// Zoom in pages |
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_zoomStart.y -= event.deltaY * 0.025; |
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break; |
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case 1: |
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// Zoom in lines |
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_zoomStart.y -= event.deltaY * 0.01; |
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break; |
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default: |
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// undefined, 0, assume pixels |
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_zoomStart.y -= event.deltaY * 0.00025; |
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break; |
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} |
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scope.dispatchEvent( startEvent ); |
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scope.dispatchEvent( endEvent ); |
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} |
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function touchstart( event ) { |
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if ( scope.enabled === false ) return; |
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event.preventDefault(); |
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switch ( event.touches.length ) { |
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case 1: |
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_state = STATE.TOUCH_ROTATE; |
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_moveCurr.copy( getMouseOnCircle( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) ); |
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_movePrev.copy( _moveCurr ); |
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break; |
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default: // 2 or more |
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_state = STATE.TOUCH_ZOOM_PAN; |
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var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX; |
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var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY; |
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_touchZoomDistanceEnd = _touchZoomDistanceStart = Math.sqrt( dx * dx + dy * dy ); |
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var x = ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX ) / 2; |
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var y = ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY ) / 2; |
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_panStart.copy( getMouseOnScreen( x, y ) ); |
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_panEnd.copy( _panStart ); |
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break; |
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} |
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scope.dispatchEvent( startEvent ); |
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} |
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function touchmove( event ) { |
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if ( scope.enabled === false ) return; |
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event.preventDefault(); |
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event.stopPropagation(); |
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switch ( event.touches.length ) { |
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case 1: |
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_movePrev.copy( _moveCurr ); |
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_moveCurr.copy( getMouseOnCircle( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) ); |
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break; |
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default: // 2 or more |
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var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX; |
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var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY; |
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_touchZoomDistanceEnd = Math.sqrt( dx * dx + dy * dy ); |
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var x = ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX ) / 2; |
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var y = ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY ) / 2; |
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_panEnd.copy( getMouseOnScreen( x, y ) ); |
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break; |
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} |
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} |
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function touchend( event ) { |
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if ( scope.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; |
|
|
|
} |
|
|
|
scope.dispatchEvent( endEvent ); |
|
|
|
} |
|
|
|
function contextmenu( event ) { |
|
|
|
if ( scope.enabled === false ) return; |
|
|
|
event.preventDefault(); |
|
|
|
} |
|
|
|
this.dispose = function () { |
|
|
|
scope.domElement.removeEventListener( 'contextmenu', contextmenu ); |
|
|
|
scope.domElement.removeEventListener( 'pointerdown', onPointerDown ); |
|
scope.domElement.removeEventListener( 'wheel', mousewheel ); |
|
|
|
scope.domElement.removeEventListener( 'touchstart', touchstart ); |
|
scope.domElement.removeEventListener( 'touchend', touchend ); |
|
scope.domElement.removeEventListener( 'touchmove', touchmove ); |
|
|
|
scope.domElement.ownerDocument.removeEventListener( 'pointermove', onPointerMove ); |
|
scope.domElement.ownerDocument.removeEventListener( 'pointerup', onPointerUp ); |
|
|
|
window.removeEventListener( 'keydown', keydown ); |
|
window.removeEventListener( 'keyup', keyup ); |
|
|
|
}; |
|
|
|
this.domElement.addEventListener( 'contextmenu', contextmenu ); |
|
|
|
this.domElement.addEventListener( 'pointerdown', onPointerDown ); |
|
this.domElement.addEventListener( 'wheel', mousewheel ); |
|
|
|
this.domElement.addEventListener( 'touchstart', touchstart ); |
|
this.domElement.addEventListener( 'touchend', touchend ); |
|
this.domElement.addEventListener( 'touchmove', touchmove ); |
|
|
|
this.domElement.ownerDocument.addEventListener( 'pointermove', onPointerMove ); |
|
this.domElement.ownerDocument.addEventListener( 'pointerup', onPointerUp ); |
|
|
|
window.addEventListener( 'keydown', keydown ); |
|
window.addEventListener( 'keyup', keyup ); |
|
|
|
this.handleResize(); |
|
|
|
// force an update at start |
|
this.update(); |
|
|
|
}; |
|
|
|
THREE.TrackballControls.prototype = Object.create( THREE.EventDispatcher.prototype ); |
|
THREE.TrackballControls.prototype.constructor = THREE.TrackballControls;
|
|
|