1002 lines
21 KiB
JavaScript
1002 lines
21 KiB
JavaScript
import {
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Controls,
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MathUtils,
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MOUSE,
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Quaternion,
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Vector2,
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Vector3
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} from 'three';
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/**
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* Fires when the camera has been transformed by the controls.
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*
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* @event TrackballControls#change
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* @type {Object}
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*/
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const _changeEvent = { type: 'change' };
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/**
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* Fires when an interaction was initiated.
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*
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* @event TrackballControls#start
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* @type {Object}
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*/
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const _startEvent = { type: 'start' };
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/**
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* Fires when an interaction has finished.
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*
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* @event TrackballControls#end
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* @type {Object}
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*/
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const _endEvent = { type: 'end' };
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const _EPS = 0.000001;
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const _STATE = { NONE: - 1, ROTATE: 0, ZOOM: 1, PAN: 2, TOUCH_ROTATE: 3, TOUCH_ZOOM_PAN: 4 };
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const _v2 = new Vector2();
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const _mouseChange = new Vector2();
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const _objectUp = new Vector3();
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const _pan = new Vector3();
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const _axis = new Vector3();
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const _quaternion = new Quaternion();
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const _eyeDirection = new Vector3();
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const _objectUpDirection = new Vector3();
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const _objectSidewaysDirection = new Vector3();
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const _moveDirection = new Vector3();
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/**
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* This class is similar to {@link OrbitControls}. However, it does not maintain a constant camera
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* `up` vector. That means if the camera orbits over the “north” and “south” poles, it does not flip
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* to stay "right side up".
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*
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* @augments Controls
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* @three_import import { TrackballControls } from 'three/addons/controls/TrackballControls.js';
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*/
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class TrackballControls extends Controls {
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/**
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* Constructs a new controls instance.
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*
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* @param {Object3D} object - The object that is managed by the controls.
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* @param {?HTMLDOMElement} domElement - The HTML element used for event listeners.
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*/
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constructor( object, domElement = null ) {
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super( object, domElement );
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/**
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* Represents the properties of the screen. Automatically set when `handleResize()` is called.
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*
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* @type {Object}
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* @readonly
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*/
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this.screen = { left: 0, top: 0, width: 0, height: 0 };
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/**
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* The rotation speed.
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*
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* @type {number}
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* @default 1
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*/
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this.rotateSpeed = 1.0;
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/**
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* The zoom speed.
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*
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* @type {number}
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* @default 1.2
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*/
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this.zoomSpeed = 1.2;
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/**
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* The pan speed.
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*
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* @type {number}
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* @default 0.3
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*/
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this.panSpeed = 0.3;
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/**
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* Whether rotation is disabled or not.
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*
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* @type {boolean}
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* @default false
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*/
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this.noRotate = false;
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/**
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* Whether zooming is disabled or not.
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*
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* @type {boolean}
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* @default false
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*/
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this.noZoom = false;
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/**
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* Whether panning is disabled or not.
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*
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* @type {boolean}
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* @default false
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*/
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this.noPan = false;
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/**
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* Whether damping is disabled or not.
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*
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* @type {boolean}
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* @default false
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*/
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this.staticMoving = false;
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/**
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* Defines the intensity of damping. Only considered if `staticMoving` is set to `false`.
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*
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* @type {number}
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* @default 0.2
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*/
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this.dynamicDampingFactor = 0.2;
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/**
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* How far you can dolly in (perspective camera only).
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*
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* @type {number}
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* @default 0
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*/
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this.minDistance = 0;
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/**
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* How far you can dolly out (perspective camera only).
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*
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* @type {number}
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* @default Infinity
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*/
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this.maxDistance = Infinity;
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/**
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* How far you can zoom in (orthographic camera only).
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*
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* @type {number}
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* @default 0
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*/
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this.minZoom = 0;
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/**
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* How far you can zoom out (orthographic camera only).
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*
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* @type {number}
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* @default Infinity
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*/
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this.maxZoom = Infinity;
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/**
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* This array holds keycodes for controlling interactions.
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*
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* - When the first defined key is pressed, all mouse interactions (left, middle, right) performs orbiting.
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* - When the second defined key is pressed, all mouse interactions (left, middle, right) performs zooming.
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* - When the third defined key is pressed, all mouse interactions (left, middle, right) performs panning.
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*
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* Default is *KeyA, KeyS, KeyD* which represents A, S, D.
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*
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* @type {Array<string>}
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*/
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this.keys = [ 'KeyA' /*A*/, 'KeyS' /*S*/, 'KeyD' /*D*/ ];
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/**
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* This object contains references to the mouse actions used by the controls.
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*
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* ```js
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* controls.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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* }
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* ```
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* @type {Object}
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*/
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this.mouseButtons = { LEFT: MOUSE.ROTATE, MIDDLE: MOUSE.DOLLY, RIGHT: MOUSE.PAN };
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/**
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* The focus point of the controls.
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*
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* @type {Vector3}
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*/
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this.target = new Vector3();
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// internals
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this.state = _STATE.NONE;
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this.keyState = _STATE.NONE;
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this._lastPosition = new Vector3();
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this._lastZoom = 1;
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this._touchZoomDistanceStart = 0;
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this._touchZoomDistanceEnd = 0;
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this._lastAngle = 0;
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this._eye = new Vector3();
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this._movePrev = new Vector2();
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this._moveCurr = new Vector2();
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this._lastAxis = new Vector3();
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this._zoomStart = new Vector2();
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this._zoomEnd = new Vector2();
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this._panStart = new Vector2();
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this._panEnd = new Vector2();
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this._pointers = [];
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this._pointerPositions = {};
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// event listeners
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this._onPointerMove = onPointerMove.bind( this );
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this._onPointerDown = onPointerDown.bind( this );
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this._onPointerUp = onPointerUp.bind( this );
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this._onPointerCancel = onPointerCancel.bind( this );
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this._onContextMenu = onContextMenu.bind( this );
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this._onMouseWheel = onMouseWheel.bind( this );
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this._onKeyDown = onKeyDown.bind( this );
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this._onKeyUp = onKeyUp.bind( this );
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this._onTouchStart = onTouchStart.bind( this );
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this._onTouchMove = onTouchMove.bind( this );
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this._onTouchEnd = onTouchEnd.bind( this );
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this._onMouseDown = onMouseDown.bind( this );
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this._onMouseMove = onMouseMove.bind( this );
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this._onMouseUp = onMouseUp.bind( this );
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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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if ( domElement !== null ) {
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this.connect( domElement );
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this.handleResize();
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}
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// force an update at start
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this.update();
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}
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connect( element ) {
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super.connect( element );
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window.addEventListener( 'keydown', this._onKeyDown );
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window.addEventListener( 'keyup', this._onKeyUp );
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this.domElement.addEventListener( 'pointerdown', this._onPointerDown );
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this.domElement.addEventListener( 'pointercancel', this._onPointerCancel );
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this.domElement.addEventListener( 'wheel', this._onMouseWheel, { passive: false } );
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this.domElement.addEventListener( 'contextmenu', this._onContextMenu );
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this.domElement.style.touchAction = 'none'; // disable touch scroll
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}
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disconnect() {
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window.removeEventListener( 'keydown', this._onKeyDown );
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window.removeEventListener( 'keyup', this._onKeyUp );
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this.domElement.removeEventListener( 'pointerdown', this._onPointerDown );
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this.domElement.removeEventListener( 'pointermove', this._onPointerMove );
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this.domElement.removeEventListener( 'pointerup', this._onPointerUp );
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this.domElement.removeEventListener( 'pointercancel', this._onPointerCancel );
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this.domElement.removeEventListener( 'wheel', this._onMouseWheel );
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this.domElement.removeEventListener( 'contextmenu', this._onContextMenu );
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this.domElement.style.touchAction = 'auto'; // disable touch scroll
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}
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dispose() {
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this.disconnect();
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}
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/**
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* Must be called if the application window is resized.
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*/
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handleResize() {
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const box = this.domElement.getBoundingClientRect();
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// adjustments come from similar code in the jquery offset() function
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const d = this.domElement.ownerDocument.documentElement;
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this.screen.left = box.left + window.pageXOffset - d.clientLeft;
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this.screen.top = box.top + window.pageYOffset - d.clientTop;
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this.screen.width = box.width;
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this.screen.height = box.height;
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}
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update() {
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this._eye.subVectors( this.object.position, this.target );
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if ( ! this.noRotate ) {
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this._rotateCamera();
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}
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if ( ! this.noZoom ) {
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this._zoomCamera();
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}
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if ( ! this.noPan ) {
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this._panCamera();
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}
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this.object.position.addVectors( this.target, this._eye );
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if ( this.object.isPerspectiveCamera ) {
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this._checkDistances();
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this.object.lookAt( this.target );
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if ( this._lastPosition.distanceToSquared( this.object.position ) > _EPS ) {
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this.dispatchEvent( _changeEvent );
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this._lastPosition.copy( this.object.position );
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}
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} else if ( this.object.isOrthographicCamera ) {
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this.object.lookAt( this.target );
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if ( this._lastPosition.distanceToSquared( this.object.position ) > _EPS || this._lastZoom !== this.object.zoom ) {
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this.dispatchEvent( _changeEvent );
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this._lastPosition.copy( this.object.position );
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this._lastZoom = this.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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/**
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* Resets the controls to its initial state.
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*/
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reset() {
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this.state = _STATE.NONE;
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this.keyState = _STATE.NONE;
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this.target.copy( this._target0 );
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this.object.position.copy( this._position0 );
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this.object.up.copy( this._up0 );
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this.object.zoom = this._zoom0;
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this.object.updateProjectionMatrix();
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this._eye.subVectors( this.object.position, this.target );
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this.object.lookAt( this.target );
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this.dispatchEvent( _changeEvent );
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this._lastPosition.copy( this.object.position );
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this._lastZoom = this.object.zoom;
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}
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_panCamera() {
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_mouseChange.copy( this._panEnd ).sub( this._panStart );
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if ( _mouseChange.lengthSq() ) {
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if ( this.object.isOrthographicCamera ) {
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const scale_x = ( this.object.right - this.object.left ) / this.object.zoom / this.domElement.clientWidth;
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const scale_y = ( this.object.top - this.object.bottom ) / this.object.zoom / this.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( this._eye.length() * this.panSpeed );
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_pan.copy( this._eye ).cross( this.object.up ).setLength( _mouseChange.x );
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_pan.add( _objectUp.copy( this.object.up ).setLength( _mouseChange.y ) );
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this.object.position.add( _pan );
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this.target.add( _pan );
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if ( this.staticMoving ) {
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this._panStart.copy( this._panEnd );
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} else {
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this._panStart.add( _mouseChange.subVectors( this._panEnd, this._panStart ).multiplyScalar( this.dynamicDampingFactor ) );
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}
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}
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}
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_rotateCamera() {
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_moveDirection.set( this._moveCurr.x - this._movePrev.x, this._moveCurr.y - this._movePrev.y, 0 );
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let angle = _moveDirection.length();
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if ( angle ) {
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this._eye.copy( this.object.position ).sub( this.target );
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_eyeDirection.copy( this._eye ).normalize();
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_objectUpDirection.copy( this.object.up ).normalize();
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_objectSidewaysDirection.crossVectors( _objectUpDirection, _eyeDirection ).normalize();
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_objectUpDirection.setLength( this._moveCurr.y - this._movePrev.y );
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_objectSidewaysDirection.setLength( this._moveCurr.x - this._movePrev.x );
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_moveDirection.copy( _objectUpDirection.add( _objectSidewaysDirection ) );
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_axis.crossVectors( _moveDirection, this._eye ).normalize();
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angle *= this.rotateSpeed;
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_quaternion.setFromAxisAngle( _axis, angle );
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this._eye.applyQuaternion( _quaternion );
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this.object.up.applyQuaternion( _quaternion );
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this._lastAxis.copy( _axis );
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this._lastAngle = angle;
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} else if ( ! this.staticMoving && this._lastAngle ) {
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this._lastAngle *= Math.sqrt( 1.0 - this.dynamicDampingFactor );
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this._eye.copy( this.object.position ).sub( this.target );
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_quaternion.setFromAxisAngle( this._lastAxis, this._lastAngle );
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this._eye.applyQuaternion( _quaternion );
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this.object.up.applyQuaternion( _quaternion );
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}
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this._movePrev.copy( this._moveCurr );
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}
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_zoomCamera() {
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let factor;
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if ( this.state === _STATE.TOUCH_ZOOM_PAN ) {
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factor = this._touchZoomDistanceStart / this._touchZoomDistanceEnd;
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this._touchZoomDistanceStart = this._touchZoomDistanceEnd;
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if ( this.object.isPerspectiveCamera ) {
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this._eye.multiplyScalar( factor );
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} else if ( this.object.isOrthographicCamera ) {
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this.object.zoom = MathUtils.clamp( this.object.zoom / factor, this.minZoom, this.maxZoom );
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if ( this._lastZoom !== this.object.zoom ) {
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this.object.updateProjectionMatrix();
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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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} else {
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factor = 1.0 + ( this._zoomEnd.y - this._zoomStart.y ) * this.zoomSpeed;
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if ( factor !== 1.0 && factor > 0.0 ) {
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if ( this.object.isPerspectiveCamera ) {
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this._eye.multiplyScalar( factor );
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} else if ( this.object.isOrthographicCamera ) {
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this.object.zoom = MathUtils.clamp( this.object.zoom / factor, this.minZoom, this.maxZoom );
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if ( this._lastZoom !== this.object.zoom ) {
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this.object.updateProjectionMatrix();
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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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if ( this.staticMoving ) {
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this._zoomStart.copy( this._zoomEnd );
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} else {
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this._zoomStart.y += ( this._zoomEnd.y - this._zoomStart.y ) * this.dynamicDampingFactor;
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}
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}
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}
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_getMouseOnScreen( pageX, pageY ) {
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_v2.set(
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( pageX - this.screen.left ) / this.screen.width,
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( pageY - this.screen.top ) / this.screen.height
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);
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return _v2;
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}
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_getMouseOnCircle( pageX, pageY ) {
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_v2.set(
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( ( pageX - this.screen.width * 0.5 - this.screen.left ) / ( this.screen.width * 0.5 ) ),
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( ( this.screen.height + 2 * ( this.screen.top - pageY ) ) / this.screen.width ) // screen.width intentional
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);
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return _v2;
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}
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_addPointer( event ) {
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this._pointers.push( event );
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}
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_removePointer( event ) {
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delete this._pointerPositions[ event.pointerId ];
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for ( let i = 0; i < this._pointers.length; i ++ ) {
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if ( this._pointers[ i ].pointerId == event.pointerId ) {
|
|
|
|
this._pointers.splice( i, 1 );
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
_trackPointer( event ) {
|
|
|
|
let position = this._pointerPositions[ event.pointerId ];
|
|
|
|
if ( position === undefined ) {
|
|
|
|
position = new Vector2();
|
|
this._pointerPositions[ event.pointerId ] = position;
|
|
|
|
}
|
|
|
|
position.set( event.pageX, event.pageY );
|
|
|
|
}
|
|
|
|
_getSecondPointerPosition( event ) {
|
|
|
|
const pointer = ( event.pointerId === this._pointers[ 0 ].pointerId ) ? this._pointers[ 1 ] : this._pointers[ 0 ];
|
|
|
|
return this._pointerPositions[ pointer.pointerId ];
|
|
|
|
}
|
|
|
|
_checkDistances() {
|
|
|
|
if ( ! this.noZoom || ! this.noPan ) {
|
|
|
|
if ( this._eye.lengthSq() > this.maxDistance * this.maxDistance ) {
|
|
|
|
this.object.position.addVectors( this.target, this._eye.setLength( this.maxDistance ) );
|
|
this._zoomStart.copy( this._zoomEnd );
|
|
|
|
}
|
|
|
|
if ( this._eye.lengthSq() < this.minDistance * this.minDistance ) {
|
|
|
|
this.object.position.addVectors( this.target, this._eye.setLength( this.minDistance ) );
|
|
this._zoomStart.copy( this._zoomEnd );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function onPointerDown( event ) {
|
|
|
|
if ( this.enabled === false ) return;
|
|
|
|
if ( this._pointers.length === 0 ) {
|
|
|
|
this.domElement.setPointerCapture( event.pointerId );
|
|
|
|
this.domElement.addEventListener( 'pointermove', this._onPointerMove );
|
|
this.domElement.addEventListener( 'pointerup', this._onPointerUp );
|
|
|
|
}
|
|
|
|
//
|
|
|
|
this._addPointer( event );
|
|
|
|
if ( event.pointerType === 'touch' ) {
|
|
|
|
this._onTouchStart( event );
|
|
|
|
} else {
|
|
|
|
this._onMouseDown( event );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function onPointerMove( event ) {
|
|
|
|
if ( this.enabled === false ) return;
|
|
|
|
if ( event.pointerType === 'touch' ) {
|
|
|
|
this._onTouchMove( event );
|
|
|
|
} else {
|
|
|
|
this._onMouseMove( event );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function onPointerUp( event ) {
|
|
|
|
if ( this.enabled === false ) return;
|
|
|
|
if ( event.pointerType === 'touch' ) {
|
|
|
|
this._onTouchEnd( event );
|
|
|
|
} else {
|
|
|
|
this._onMouseUp();
|
|
|
|
}
|
|
|
|
//
|
|
|
|
this._removePointer( event );
|
|
|
|
if ( this._pointers.length === 0 ) {
|
|
|
|
this.domElement.releasePointerCapture( event.pointerId );
|
|
|
|
this.domElement.removeEventListener( 'pointermove', this._onPointerMove );
|
|
this.domElement.removeEventListener( 'pointerup', this._onPointerUp );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function onPointerCancel( event ) {
|
|
|
|
this._removePointer( event );
|
|
|
|
}
|
|
|
|
function onKeyUp() {
|
|
|
|
if ( this.enabled === false ) return;
|
|
|
|
this.keyState = _STATE.NONE;
|
|
|
|
window.addEventListener( 'keydown', this._onKeyDown );
|
|
|
|
}
|
|
|
|
function onKeyDown( event ) {
|
|
|
|
if ( this.enabled === false ) return;
|
|
|
|
window.removeEventListener( 'keydown', this._onKeyDown );
|
|
|
|
if ( this.keyState !== _STATE.NONE ) {
|
|
|
|
return;
|
|
|
|
} else if ( event.code === this.keys[ _STATE.ROTATE ] && ! this.noRotate ) {
|
|
|
|
this.keyState = _STATE.ROTATE;
|
|
|
|
} else if ( event.code === this.keys[ _STATE.ZOOM ] && ! this.noZoom ) {
|
|
|
|
this.keyState = _STATE.ZOOM;
|
|
|
|
} else if ( event.code === this.keys[ _STATE.PAN ] && ! this.noPan ) {
|
|
|
|
this.keyState = _STATE.PAN;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function onMouseDown( event ) {
|
|
|
|
let mouseAction;
|
|
|
|
switch ( event.button ) {
|
|
|
|
case 0:
|
|
mouseAction = this.mouseButtons.LEFT;
|
|
break;
|
|
|
|
case 1:
|
|
mouseAction = this.mouseButtons.MIDDLE;
|
|
break;
|
|
|
|
case 2:
|
|
mouseAction = this.mouseButtons.RIGHT;
|
|
break;
|
|
|
|
default:
|
|
mouseAction = - 1;
|
|
|
|
}
|
|
|
|
switch ( mouseAction ) {
|
|
|
|
case MOUSE.DOLLY:
|
|
this.state = _STATE.ZOOM;
|
|
break;
|
|
|
|
case MOUSE.ROTATE:
|
|
this.state = _STATE.ROTATE;
|
|
break;
|
|
|
|
case MOUSE.PAN:
|
|
this.state = _STATE.PAN;
|
|
break;
|
|
|
|
default:
|
|
this.state = _STATE.NONE;
|
|
|
|
}
|
|
|
|
const state = ( this.keyState !== _STATE.NONE ) ? this.keyState : this.state;
|
|
|
|
if ( state === _STATE.ROTATE && ! this.noRotate ) {
|
|
|
|
this._moveCurr.copy( this._getMouseOnCircle( event.pageX, event.pageY ) );
|
|
this._movePrev.copy( this._moveCurr );
|
|
|
|
} else if ( state === _STATE.ZOOM && ! this.noZoom ) {
|
|
|
|
this._zoomStart.copy( this._getMouseOnScreen( event.pageX, event.pageY ) );
|
|
this._zoomEnd.copy( this._zoomStart );
|
|
|
|
} else if ( state === _STATE.PAN && ! this.noPan ) {
|
|
|
|
this._panStart.copy( this._getMouseOnScreen( event.pageX, event.pageY ) );
|
|
this._panEnd.copy( this._panStart );
|
|
|
|
}
|
|
|
|
this.dispatchEvent( _startEvent );
|
|
|
|
}
|
|
|
|
function onMouseMove( event ) {
|
|
|
|
const state = ( this.keyState !== _STATE.NONE ) ? this.keyState : this.state;
|
|
|
|
if ( state === _STATE.ROTATE && ! this.noRotate ) {
|
|
|
|
this._movePrev.copy( this._moveCurr );
|
|
this._moveCurr.copy( this._getMouseOnCircle( event.pageX, event.pageY ) );
|
|
|
|
} else if ( state === _STATE.ZOOM && ! this.noZoom ) {
|
|
|
|
this._zoomEnd.copy( this._getMouseOnScreen( event.pageX, event.pageY ) );
|
|
|
|
} else if ( state === _STATE.PAN && ! this.noPan ) {
|
|
|
|
this._panEnd.copy( this._getMouseOnScreen( event.pageX, event.pageY ) );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function onMouseUp() {
|
|
|
|
this.state = _STATE.NONE;
|
|
|
|
this.dispatchEvent( _endEvent );
|
|
|
|
}
|
|
|
|
function onMouseWheel( event ) {
|
|
|
|
if ( this.enabled === false ) return;
|
|
|
|
if ( this.noZoom === true ) return;
|
|
|
|
event.preventDefault();
|
|
|
|
switch ( event.deltaMode ) {
|
|
|
|
case 2:
|
|
// Zoom in pages
|
|
this._zoomStart.y -= event.deltaY * 0.025;
|
|
break;
|
|
|
|
case 1:
|
|
// Zoom in lines
|
|
this._zoomStart.y -= event.deltaY * 0.01;
|
|
break;
|
|
|
|
default:
|
|
// undefined, 0, assume pixels
|
|
this._zoomStart.y -= event.deltaY * 0.00025;
|
|
break;
|
|
|
|
}
|
|
|
|
this.dispatchEvent( _startEvent );
|
|
this.dispatchEvent( _endEvent );
|
|
|
|
}
|
|
|
|
function onContextMenu( event ) {
|
|
|
|
if ( this.enabled === false ) return;
|
|
|
|
event.preventDefault();
|
|
|
|
}
|
|
|
|
function onTouchStart( event ) {
|
|
|
|
this._trackPointer( event );
|
|
|
|
switch ( this._pointers.length ) {
|
|
|
|
case 1:
|
|
this.state = _STATE.TOUCH_ROTATE;
|
|
this._moveCurr.copy( this._getMouseOnCircle( this._pointers[ 0 ].pageX, this._pointers[ 0 ].pageY ) );
|
|
this._movePrev.copy( this._moveCurr );
|
|
break;
|
|
|
|
default: // 2 or more
|
|
this.state = _STATE.TOUCH_ZOOM_PAN;
|
|
const dx = this._pointers[ 0 ].pageX - this._pointers[ 1 ].pageX;
|
|
const dy = this._pointers[ 0 ].pageY - this._pointers[ 1 ].pageY;
|
|
this._touchZoomDistanceEnd = this._touchZoomDistanceStart = Math.sqrt( dx * dx + dy * dy );
|
|
|
|
const x = ( this._pointers[ 0 ].pageX + this._pointers[ 1 ].pageX ) / 2;
|
|
const y = ( this._pointers[ 0 ].pageY + this._pointers[ 1 ].pageY ) / 2;
|
|
this._panStart.copy( this._getMouseOnScreen( x, y ) );
|
|
this._panEnd.copy( this._panStart );
|
|
break;
|
|
|
|
}
|
|
|
|
this.dispatchEvent( _startEvent );
|
|
|
|
}
|
|
|
|
function onTouchMove( event ) {
|
|
|
|
this._trackPointer( event );
|
|
|
|
switch ( this._pointers.length ) {
|
|
|
|
case 1:
|
|
this._movePrev.copy( this._moveCurr );
|
|
this._moveCurr.copy( this._getMouseOnCircle( event.pageX, event.pageY ) );
|
|
break;
|
|
|
|
default: // 2 or more
|
|
|
|
const position = this._getSecondPointerPosition( event );
|
|
|
|
const dx = event.pageX - position.x;
|
|
const dy = event.pageY - position.y;
|
|
this._touchZoomDistanceEnd = Math.sqrt( dx * dx + dy * dy );
|
|
|
|
const x = ( event.pageX + position.x ) / 2;
|
|
const y = ( event.pageY + position.y ) / 2;
|
|
this._panEnd.copy( this._getMouseOnScreen( x, y ) );
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function onTouchEnd( event ) {
|
|
|
|
switch ( this._pointers.length ) {
|
|
|
|
case 0:
|
|
this.state = _STATE.NONE;
|
|
break;
|
|
|
|
case 1:
|
|
this.state = _STATE.TOUCH_ROTATE;
|
|
this._moveCurr.copy( this._getMouseOnCircle( event.pageX, event.pageY ) );
|
|
this._movePrev.copy( this._moveCurr );
|
|
break;
|
|
|
|
case 2:
|
|
this.state = _STATE.TOUCH_ZOOM_PAN;
|
|
|
|
for ( let i = 0; i < this._pointers.length; i ++ ) {
|
|
|
|
if ( this._pointers[ i ].pointerId !== event.pointerId ) {
|
|
|
|
const position = this._pointerPositions[ this._pointers[ i ].pointerId ];
|
|
this._moveCurr.copy( this._getMouseOnCircle( position.x, position.y ) );
|
|
this._movePrev.copy( this._moveCurr );
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
this.dispatchEvent( _endEvent );
|
|
|
|
}
|
|
|
|
export { TrackballControls };
|