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* Minified by jsDelivr using Terser v5.37.0.\n * Original file: /npm/three-trackballcontrols@0.9.0/index.js\n *\n * Do NOT use SRI with dynamically generated files! More information: https://www.jsdelivr.com/using-sri-with-dynamic-files\n */\n","/**\n * @author Eberhard Graether / http://egraether.com/\n * @author Mark Lundin \t/ http://mark-lundin.com\n * @author Simone Manini / http://daron1337.github.io\n * @author Luca Antiga \t/ http://lantiga.github.io\n\n ** three-trackballcontrols module\n ** @author Jon Lim / https://jonlim.ca\n */\n\nconst THREE = window.THREE || require('three');\n\nconst TrackballControls = function (object, domElement) {\n // Pre-flight checks, with warnings / errors.\n if (domElement === undefined) console.warn('THREE.TrackballControls: The second parameter \"domElement\" is now mandatory.');\n if (domElement === document) console.error('THREE.TrackballControls: \"document\" should not be used as the target \"domElement\". Please use \"renderer.domElement\" instead.');\n\n const scope = this;\n const STATE = {\n NONE: -1,\n ROTATE: 0,\n ZOOM: 1,\n PAN: 2,\n TOUCH_ROTATE: 3,\n TOUCH_ZOOM_PAN: 4,\n };\n\n this.object = object;\n this.domElement = domElement;\n\n // API\n\n this.enabled = true;\n\n this.screen = { left: 0, top: 0, width: 0, height: 0 };\n\n this.rotateSpeed = 1.0;\n this.zoomSpeed = 1.2;\n this.panSpeed = 0.3;\n\n this.noRotate = false;\n this.noZoom = false;\n this.noPan = false;\n\n this.staticMoving = false;\n this.dynamicDampingFactor = 0.2;\n\n this.minDistance = 0;\n this.maxDistance = Infinity;\n\n /**\n * `KeyboardEvent.keyCode` values which should trigger the different \n * interaction states. Each element can be a single code or an array\n * of codes. All elements are required.\n */\n this.keys = [\n 65, // A \n 83, // S \n 68, // D\n ];\n\n /**\n * `Event` for pointer interactions which should trigger different\n * interaction states.\n */\n this.mouseButtons = { \n LEFT: THREE.MOUSE.ROTATE, \n MIDDLE: THREE.MOUSE.ZOOM, \n RIGHT: THREE.MOUSE.PAN,\n };\n\n // internals\n\n this.target = new THREE.Vector3();\n\n const EPS = 0.000001;\n\n const lastPosition = new THREE.Vector3();\n\n let _state = STATE.NONE,\n _keyState = STATE.NONE,\n\n _eye = new THREE.Vector3(),\n\n _movePrev = new THREE.Vector2(),\n _moveCurr = new THREE.Vector2(),\n\n _lastAxis = new THREE.Vector3(),\n _lastAngle = 0,\n\n _zoomStart = new THREE.Vector2(),\n _zoomEnd = new THREE.Vector2(),\n\n _touchZoomDistanceStart = 0,\n _touchZoomDistanceEnd = 0,\n\n _panStart = new THREE.Vector2(),\n _panEnd = new THREE.Vector2();\n\n // for reset\n\n this.target0 = this.target.clone();\n this.position0 = this.object.position.clone();\n this.up0 = this.object.up.clone();\n this.zoom0 = this.object.zoom;\n\n // events\n\n var changeEvent = { type: 'change' };\n var startEvent = { type: 'start' };\n var endEvent = { type: 'end' };\n\n // methods\n\n this.handleResize = function () {\n\n const box = scope.domElement.getBoundingClientRect();\n // Adjustments come from similar code in the jquery offset() function.\n const d = scope.domElement.ownerDocument.documentElement;\n scope.screen.left = box.left + window.pageXOffset - d.clientLeft;\n scope.screen.top = box.top + window.pageYOffset - d.clientTop;\n scope.screen.width = box.width;\n scope.screen.height = box.height;\n\n };\n\n const getMouseOnScreen = (function () {\n\n const vector = new THREE.Vector2();\n return function getMouseOnScreen(pageX, pageY) {\n vector.set(\n (pageX - scope.screen.left) / scope.screen.width,\n (pageY - scope.screen.top) / scope.screen.height,\n );\n\n return vector;\n };\n\n }());\n\n const getMouseOnCircle = (function () {\n\n const vector = new THREE.Vector2();\n return function getMouseOnCircle(pageX, pageY) {\n vector.set(\n ((pageX - scope.screen.width * 0.5 - scope.screen.left) / (scope.screen.width * 0.5)),\n ((scope.screen.height + 2 * (scope.screen.top - pageY)) / scope.screen.width), // screen.width intentional\n );\n\n return vector;\n };\n\n }());\n\n this.rotateCamera = (function () {\n\n let axis = new THREE.Vector3(),\n quaternion = new THREE.Quaternion(),\n eyeDirection = new THREE.Vector3(),\n objectUpDirection = new THREE.Vector3(),\n objectSidewaysDirection = new THREE.Vector3(),\n moveDirection = new THREE.Vector3(),\n angle;\n\n return function rotateCamera() {\n moveDirection.set(_moveCurr.x - _movePrev.x, _moveCurr.y - _movePrev.y, 0);\n angle = moveDirection.length();\n\n if (angle) {\n\n _eye.copy(scope.object.position).sub(scope.target);\n\n eyeDirection.copy(_eye).normalize();\n objectUpDirection.copy(scope.object.up).normalize();\n objectSidewaysDirection.crossVectors(objectUpDirection, eyeDirection).normalize();\n\n objectUpDirection.setLength(_moveCurr.y - _movePrev.y);\n objectSidewaysDirection.setLength(_moveCurr.x - _movePrev.x);\n\n moveDirection.copy(objectUpDirection.add(objectSidewaysDirection));\n\n axis.crossVectors(moveDirection, _eye).normalize();\n\n angle *= scope.rotateSpeed;\n quaternion.setFromAxisAngle(axis, angle);\n\n _eye.applyQuaternion(quaternion);\n scope.object.up.applyQuaternion(quaternion);\n\n _lastAxis.copy(axis);\n _lastAngle = angle;\n\n } else if (!scope.staticMoving && _lastAngle) {\n\n _lastAngle *= Math.sqrt(1.0 - scope.dynamicDampingFactor);\n _eye.copy(scope.object.position).sub(scope.target);\n quaternion.setFromAxisAngle(_lastAxis, _lastAngle);\n _eye.applyQuaternion(quaternion);\n scope.object.up.applyQuaternion(quaternion);\n\n }\n\n _movePrev.copy(_moveCurr);\n };\n\n }());\n\n\n this.zoomCamera = function () {\n\n let factor;\n\n if (_state === STATE.TOUCH_ZOOM_PAN) {\n\n factor = _touchZoomDistanceStart / _touchZoomDistanceEnd;\n _touchZoomDistanceStart = _touchZoomDistanceEnd;\n _eye.multiplyScalar(factor);\n\n } else {\n\n factor = 1.0 + (_zoomEnd.y - _zoomStart.y) * scope.zoomSpeed;\n if (factor !== 1.0 && factor > 0.0) {\n _eye.multiplyScalar(factor);\n }\n\n if (scope.staticMoving) {\n _zoomStart.copy(_zoomEnd);\n } else {\n _zoomStart.y += (_zoomEnd.y - _zoomStart.y) * this.dynamicDampingFactor;\n }\n\n }\n\n };\n\n this.panCamera = (function () {\n\n let mouseChange = new THREE.Vector2(),\n objectUp = new THREE.Vector3(),\n pan = new THREE.Vector3();\n\n return function panCamera() {\n mouseChange.copy(_panEnd).sub(_panStart);\n\n if (mouseChange.lengthSq()) {\n mouseChange.multiplyScalar(_eye.length() * scope.panSpeed);\n\n pan.copy(_eye).cross(scope.object.up).setLength(mouseChange.x);\n pan.add(objectUp.copy(scope.object.up).setLength(mouseChange.y));\n\n scope.object.position.add(pan);\n scope.target.add(pan);\n\n if (scope.staticMoving) {\n _panStart.copy(_panEnd);\n } else {\n _panStart.add(mouseChange.subVectors(_panEnd, _panStart).multiplyScalar(scope.dynamicDampingFactor));\n }\n }\n\n };\n\n }());\n\n this.checkDistances = function () {\n\n if (!scope.noZoom || !scope.noPan) {\n\n if (_eye.lengthSq() > scope.maxDistance * scope.maxDistance) {\n scope.object.position.addVectors(scope.target, _eye.setLength(scope.maxDistance));\n _zoomStart.copy(_zoomEnd);\n }\n\n if (_eye.lengthSq() < scope.minDistance * scope.minDistance) {\n scope.object.position.addVectors(scope.target, _eye.setLength(scope.minDistance));\n _zoomStart.copy(_zoomEnd);\n }\n\n }\n\n };\n\n this.update = function () {\n\n _eye.subVectors(scope.object.position, scope.target);\n\n if (!scope.noRotate) {\n scope.rotateCamera();\n }\n\n if (!scope.noZoom) {\n scope.zoomCamera();\n }\n\n if (!scope.noPan) {\n scope.panCamera();\n }\n\n scope.object.position.addVectors(scope.target, _eye);\n scope.checkDistances();\n scope.object.lookAt(scope.target);\n\n if (lastPosition.distanceToSquared(scope.object.position) > EPS) {\n scope.dispatchEvent(changeEvent);\n lastPosition.copy(scope.object.position);\n }\n\n };\n\n this.reset = function () {\n\n _state = STATE.NONE;\n _keyState = STATE.NONE;\n\n scope.target.copy(scope.target0);\n scope.object.position.copy(scope.position0);\n scope.object.up.copy(scope.up0);\n\n _eye.subVectors(scope.object.position, scope.target);\n\n scope.object.lookAt(scope.target);\n\n scope.dispatchEvent(changeEvent);\n\n lastPosition.copy(scope.object.position);\n\n };\n\n // Listeners\n\n function onPointerDown( event ) {\n\n\t\tif ( scope.enabled === false ) return;\n\n\t\tswitch ( event.pointerType ) {\n\n\t\t\tcase 'mouse':\n\t\t\tcase 'pen':\n\t\t\t\tonMouseDown( event );\n\t\t\t\tbreak;\n\n\t\t\t// TODO touch\n\n\t\t}\n\n\t}\n\n function onPointerMove(event) {\n\n if (scope.enabled === false) return;\n\n switch (event.pointerType) {\n\n case 'mouse':\n case 'pen':\n onMouseMove(event);\n break;\n\n // TODO touch\n\n }\n\n }\n\n function onPointerUp(event) {\n\n if (scope.enabled === false) return;\n\n switch (event.pointerType) {\n\n case 'mouse':\n case 'pen':\n onMouseUp(event);\n break;\n\n // TODO touch\n\n }\n\n }\n\n function keydown(event) {\n\n if (scope.enabled === false) return;\n\n window.removeEventListener('keydown', keydown);\n\n if (_keyState !== STATE.NONE) {\n return;\n } else if (event.keyCode === scope.keys[STATE.ROTATE] && !scope.noRotate) {\n _keyState = STATE.ROTATE;\n } else if (event.keyCode === scope.keys[STATE.ZOOM] && !scope.noZoom) {\n _keyState = STATE.ZOOM;\n } else if (event.keyCode === scope.keys[STATE.PAN] && !scope.noPan) {\n _keyState = STATE.PAN;\n }\n\n }\n\n function keyup() {\n\n if (scope.enabled === false) return;\n\n _keyState = STATE.NONE;\n\n window.addEventListener('keydown', keydown, false);\n\n }\n\n function onMouseDown(event) {\n\n event.preventDefault();\n event.stopPropagation();\n\n if (_state === STATE.NONE) {\n\n switch (event.button) {\n case scope.mouseButtons.LEFT:\n _state = STATE.ROTATE;\n break;\n\n case scope.mouseButtons.MIDDLE:\n _state = STATE.ZOOM;\n break;\n\n case scope.mouseButtons.RIGHT:\n _state = STATE.PAN;\n break;\n\n default:\n _state = STATE.NONE;\n }\n\n }\n\n const state = (_keyState !== STATE.NONE) ? _keyState : _state;\n\n if (state === STATE.ROTATE && !scope.noRotate) {\n\n _moveCurr.copy(getMouseOnCircle(event.pageX, event.pageY));\n _movePrev.copy(_moveCurr);\n\n } else if (state === STATE.ZOOM && !scope.noZoom) {\n\n _zoomStart.copy(getMouseOnScreen(event.pageX, event.pageY));\n _zoomEnd.copy(_zoomStart);\n\n } else if (state === STATE.PAN && !scope.noPan) {\n\n _panStart.copy(getMouseOnScreen(event.pageX, event.pageY));\n _panEnd.copy(_panStart);\n\n }\n\n scope.domElement.ownerDocument.addEventListener('pointermove', onPointerMove, false);\n scope.domElement.ownerDocument.addEventListener('pointerup', onPointerUp, false);\n\n scope.dispatchEvent(startEvent);\n\n }\n\n function onMouseMove(event) {\n\n if (scope.enabled === false) return;\n\n event.preventDefault();\n event.stopPropagation();\n\n const state = (_keyState !== STATE.NONE) ? _keyState : _state;\n\n if (state === STATE.ROTATE && !scope.noRotate) {\n\n _movePrev.copy(_moveCurr);\n _moveCurr.copy(getMouseOnCircle(event.pageX, event.pageY));\n\n } else if (state === STATE.ZOOM && !scope.noZoom) {\n\n _zoomEnd.copy(getMouseOnScreen(event.pageX, event.pageY));\n\n } else if (state === STATE.PAN && !scope.noPan) {\n\n _panEnd.copy(getMouseOnScreen(event.pageX, event.pageY));\n\n }\n\n }\n\n function onMouseUp(event) {\n\n if (scope.enabled === false) return;\n\n event.preventDefault();\n event.stopPropagation();\n\n _state = STATE.NONE;\n\n scope.domElement.ownerDocument.removeEventListener('pointermove', onPointerMove);\n scope.domElement.ownerDocument.removeEventListener('pointerup', onPointerUp);\n scope.dispatchEvent(endEvent);\n\n }\n\n function mousewheel(event) {\n\n if (scope.enabled === false) return;\n if (scope.noZoom === true) return;\n\n event.preventDefault();\n event.stopPropagation();\n\n switch (event.deltaMode) {\n\n case 2:\n // Zoom in pages\n _zoomStart.y -= event.deltaY * 0.025;\n break;\n\n case 1:\n // Zoom in lines\n _zoomStart.y -= event.deltaY * 0.01;\n break;\n\n default:\n // undefined, 0, assume pixels\n _zoomStart.y -= event.deltaY * 0.00025;\n break;\n\n }\n\n scope.dispatchEvent(startEvent);\n scope.dispatchEvent(endEvent);\n\n }\n\n function touchstart(event) {\n\n if (scope.enabled === false) return;\n\n event.preventDefault();\n\n switch (event.touches.length) {\n\n case 1:\n _state = STATE.TOUCH_ROTATE;\n _moveCurr.copy(getMouseOnCircle(event.touches[0].pageX, event.touches[0].pageY));\n _movePrev.copy(_moveCurr);\n break;\n\n default: // 2 or more\n _state = STATE.TOUCH_ZOOM_PAN;\n var dx = event.touches[0].pageX - event.touches[1].pageX;\n var dy = event.touches[0].pageY - event.touches[1].pageY;\n _touchZoomDistanceEnd = _touchZoomDistanceStart = Math.sqrt(dx * dx + dy * dy);\n\n var x = (event.touches[0].pageX + event.touches[1].pageX) / 2;\n var y = (event.touches[0].pageY + event.touches[1].pageY) / 2;\n _panStart.copy(getMouseOnScreen(x, y));\n _panEnd.copy(_panStart);\n break;\n\n }\n\n scope.dispatchEvent(startEvent);\n\n }\n\n function touchmove(event) {\n\n if (scope.enabled === false) return;\n\n event.preventDefault();\n event.stopPropagation();\n\n switch (event.touches.length) {\n\n case 1:\n _movePrev.copy(_moveCurr);\n _moveCurr.copy(getMouseOnCircle(event.touches[0].pageX, event.touches[0].pageY));\n break;\n\n default: // 2 or more\n var dx = event.touches[0].pageX - event.touches[1].pageX;\n var dy = event.touches[0].pageY - event.touches[1].pageY;\n _touchZoomDistanceEnd = Math.sqrt(dx * dx + dy * dy);\n\n var x = (event.touches[0].pageX + event.touches[1].pageX) / 2;\n var y = (event.touches[0].pageY + event.touches[1].pageY) / 2;\n _panEnd.copy(getMouseOnScreen(x, y));\n break;\n\n }\n\n }\n\n function touchend(event) {\n\n if (scope.enabled === false) return;\n\n switch (event.touches.length) {\n\n case 0:\n _state = STATE.NONE;\n break;\n\n case 1:\n _state = STATE.TOUCH_ROTATE;\n _moveCurr.copy(getMouseOnCircle(event.touches[0].pageX, event.touches[0].pageY));\n _movePrev.copy(_moveCurr);\n break;\n\n }\n\n scope.dispatchEvent(endEvent);\n\n }\n\n function contextmenu(event) {\n\n if (scope.enabled === false) return;\n\n event.preventDefault();\n\n }\n\n this.dispose = function () {\n\n scope.domElement.removeEventListener('contextmenu', contextmenu, false);\n scope.domElement.removeEventListener('pointerdown', onPointerDown, false);\n scope.domElement.removeEventListener('wheel', mousewheel, false);\n\n scope.domElement.removeEventListener('touchstart', touchstart, false);\n scope.domElement.removeEventListener('touchend', touchend, false);\n scope.domElement.removeEventListener('touchmove', touchmove, false);\n\n scope.domElement.ownerDocument.removeEventListener( 'pointermove', onPointerMove, false );\n\t\tscope.domElement.ownerDocument.removeEventListener( 'pointerup', onPointerUp, false );\n\n window.removeEventListener('keydown', keydown, false);\n window.removeEventListener('keyup', keyup, false);\n\n };\n\n this.domElement.addEventListener('contextmenu', contextmenu, false);\n\n this.domElement.addEventListener('pointerdown', onPointerDown, false);\n this.domElement.addEventListener('wheel', mousewheel, false);\n\n this.domElement.addEventListener('touchstart', touchstart, false);\n this.domElement.addEventListener('touchend', touchend, false);\n this.domElement.addEventListener('touchmove', touchmove, false);\n\n this.domElement.ownerDocument.addEventListener( 'pointermove', onPointerMove, false );\n\tthis.domElement.ownerDocument.addEventListener( 'pointerup', onPointerUp, false );\n\n window.addEventListener('keydown', keydown, false);\n window.addEventListener('keyup', keyup, false);\n\n this.handleResize();\n\n // force an update at start\n this.update();\n\n};\n\nTrackballControls.prototype = Object.create(THREE.EventDispatcher.prototype);\nTrackballControls.prototype.constructor = TrackballControls;\n\nexport default TrackballControls;"]}