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778 lines
17 KiB
778 lines
17 KiB
( function () {
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const _changeEvent = {
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type: 'change'
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};
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const _startEvent = {
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type: 'start'
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};
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const _endEvent = {
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type: 'end'
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};
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class TrackballControls extends THREE.EventDispatcher {
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constructor( object, domElement ) {
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super();
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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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const scope = this;
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const STATE = {
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NONE: - 1,
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ROTATE: 0,
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ZOOM: 1,
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PAN: 2,
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TOUCH_ROTATE: 3,
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TOUCH_ZOOM_PAN: 4
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};
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this.object = object;
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this.domElement = domElement;
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this.domElement.style.touchAction = 'none'; // disable touch scroll
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// API
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this.enabled = true;
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this.screen = {
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left: 0,
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top: 0,
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width: 0,
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height: 0
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};
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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 = [ 'KeyA',
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/*A*/
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'KeyS',
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/*S*/
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'KeyD'
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/*D*/
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];
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this.mouseButtons = {
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LEFT: THREE.MOUSE.ROTATE,
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MIDDLE: THREE.MOUSE.DOLLY,
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RIGHT: THREE.MOUSE.PAN
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}; // internals
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this.target = new THREE.Vector3();
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const EPS = 0.000001;
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const lastPosition = new THREE.Vector3();
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let lastZoom = 1;
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let _state = STATE.NONE,
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_keyState = STATE.NONE,
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_touchZoomDistanceStart = 0,
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_touchZoomDistanceEnd = 0,
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_lastAngle = 0;
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const _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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_zoomStart = new THREE.Vector2(),
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_zoomEnd = new THREE.Vector2(),
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_panStart = new THREE.Vector2(),
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_panEnd = new THREE.Vector2(),
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_pointers = [],
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_pointerPositions = {}; // 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; // methods
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this.handleResize = function () {
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const box = scope.domElement.getBoundingClientRect(); // adjustments come from similar code in the jquery offset() function
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const 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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const getMouseOnScreen = function () {
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const vector = new THREE.Vector2();
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return function getMouseOnScreen( pageX, pageY ) {
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vector.set( ( pageX - scope.screen.left ) / scope.screen.width, ( pageY - scope.screen.top ) / scope.screen.height );
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return vector;
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};
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}();
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const getMouseOnCircle = function () {
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const vector = new THREE.Vector2();
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return function getMouseOnCircle( pageX, pageY ) {
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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
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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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const 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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return function rotateCamera() {
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moveDirection.set( _moveCurr.x - _movePrev.x, _moveCurr.y - _movePrev.y, 0 );
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let 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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let 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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const 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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const scale_x = ( scope.object.right - scope.object.left ) / scope.object.zoom / scope.domElement.clientWidth;
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const 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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}; // listeners
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function onPointerDown( event ) {
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if ( scope.enabled === false ) return;
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if ( _pointers.length === 0 ) {
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scope.domElement.ownerDocument.addEventListener( 'pointermove', onPointerMove );
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scope.domElement.ownerDocument.addEventListener( 'pointerup', onPointerUp );
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} //
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addPointer( event );
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if ( event.pointerType === 'touch' ) {
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onTouchStart( event );
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} else {
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onMouseDown( event );
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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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if ( event.pointerType === 'touch' ) {
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onTouchMove( event );
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} else {
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onMouseMove( event );
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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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if ( event.pointerType === 'touch' ) {
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onTouchEnd( event );
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} else {
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onMouseUp();
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} //
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removePointer( event );
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if ( _pointers.length === 0 ) {
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scope.domElement.ownerDocument.removeEventListener( 'pointermove', onPointerMove );
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scope.domElement.ownerDocument.removeEventListener( 'pointerup', onPointerUp );
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}
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}
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function onPointerCancel( event ) {
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removePointer( event );
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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.code === scope.keys[ STATE.ROTATE ] && ! scope.noRotate ) {
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_keyState = STATE.ROTATE;
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} else if ( event.code === scope.keys[ STATE.ZOOM ] && ! scope.noZoom ) {
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_keyState = STATE.ZOOM;
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} else if ( event.code === 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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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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const 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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const 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() {
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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 onMouseWheel( 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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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 onTouchStart( event ) {
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trackPointer( event );
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switch ( _pointers.length ) {
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case 1:
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_state = STATE.TOUCH_ROTATE;
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_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;
|
|
|
|
} )();
|
|
|