1533 lines
32 KiB
JavaScript
1533 lines
32 KiB
JavaScript
import {
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EventDispatcher,
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MOUSE,
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Quaternion,
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Spherical,
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TOUCH,
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Vector2,
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Vector3,
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Plane,
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Ray,
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MathUtils
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} from 'three';
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// OrbitControls performs orbiting, dollying (zooming), and panning.
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// Unlike TrackballControls, it maintains the "up" direction object.up (+Y by default).
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//
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// Orbit - left mouse / touch: one-finger move
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// Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish
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// Pan - right mouse, or left mouse + ctrl/meta/shiftKey, or arrow keys / touch: two-finger move
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const _changeEvent = { type: 'change' };
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const _startEvent = { type: 'start' };
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const _endEvent = { type: 'end' };
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const _ray = new Ray();
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const _plane = new Plane();
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const TILT_LIMIT = Math.cos( 70 * MathUtils.DEG2RAD );
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class OrbitControls extends EventDispatcher {
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constructor( object, domElement ) {
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super();
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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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// Set to false to disable this control
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this.enabled = true;
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// "target" sets the location of focus, where the object orbits around
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this.target = new Vector3();
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// Sets the 3D cursor (similar to Blender), from which the maxTargetRadius takes effect
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this.cursor = new Vector3();
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// How far you can dolly in and out ( PerspectiveCamera only )
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this.minDistance = 0;
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this.maxDistance = Infinity;
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// How far you can zoom in and out ( OrthographicCamera only )
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this.minZoom = 0;
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this.maxZoom = Infinity;
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// Limit camera target within a spherical area around the cursor
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this.minTargetRadius = 0;
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this.maxTargetRadius = Infinity;
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// How far you can orbit vertically, upper and lower limits.
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// Range is 0 to Math.PI radians.
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this.minPolarAngle = 0; // radians
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this.maxPolarAngle = Math.PI; // radians
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// How far you can orbit horizontally, upper and lower limits.
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// If set, the interval [ min, max ] must be a sub-interval of [ - 2 PI, 2 PI ], with ( max - min < 2 PI )
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this.minAzimuthAngle = - Infinity; // radians
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this.maxAzimuthAngle = Infinity; // radians
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// Set to true to enable damping (inertia)
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// If damping is enabled, you must call controls.update() in your animation loop
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this.enableDamping = false;
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this.dampingFactor = 0.05;
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// This option actually enables dollying in and out; left as "zoom" for backwards compatibility.
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// Set to false to disable zooming
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this.enableZoom = true;
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this.zoomSpeed = 1.0;
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// Set to false to disable rotating
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this.enableRotate = true;
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this.rotateSpeed = 1.0;
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// Set to false to disable panning
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this.enablePan = true;
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this.panSpeed = 1.0;
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this.screenSpacePanning = true; // if false, pan orthogonal to world-space direction camera.up
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this.keyPanSpeed = 7.0; // pixels moved per arrow key push
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this.zoomToCursor = false;
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// Set to true to automatically rotate around the target
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// If auto-rotate is enabled, you must call controls.update() in your animation loop
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this.autoRotate = false;
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this.autoRotateSpeed = 2.0; // 30 seconds per orbit when fps is 60
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// The four arrow keys
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this.keys = { LEFT: 'ArrowLeft', UP: 'ArrowUp', RIGHT: 'ArrowRight', BOTTOM: 'ArrowDown' };
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// Mouse buttons
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this.mouseButtons = { LEFT: MOUSE.ROTATE, MIDDLE: MOUSE.DOLLY, RIGHT: MOUSE.PAN };
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// Touch fingers
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this.touches = { ONE: TOUCH.ROTATE, TWO: TOUCH.DOLLY_PAN };
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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.zoom0 = this.object.zoom;
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// the target DOM element for key events
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this._domElementKeyEvents = null;
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//
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// public methods
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//
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this.getPolarAngle = function () {
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return spherical.phi;
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};
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this.getAzimuthalAngle = function () {
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return spherical.theta;
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};
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this.getDistance = function () {
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return this.object.position.distanceTo( this.target );
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};
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this.listenToKeyEvents = function ( domElement ) {
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domElement.addEventListener( 'keydown', onKeyDown );
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this._domElementKeyEvents = domElement;
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};
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this.stopListenToKeyEvents = function () {
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this._domElementKeyEvents.removeEventListener( 'keydown', onKeyDown );
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this._domElementKeyEvents = null;
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};
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this.saveState = function () {
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scope.target0.copy( scope.target );
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scope.position0.copy( scope.object.position );
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scope.zoom0 = scope.object.zoom;
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};
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this.reset = function () {
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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.zoom = scope.zoom0;
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scope.object.updateProjectionMatrix();
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scope.dispatchEvent( _changeEvent );
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scope.update();
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state = STATE.NONE;
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};
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// this method is exposed, but perhaps it would be better if we can make it private...
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this.update = function () {
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const offset = new Vector3();
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// so camera.up is the orbit axis
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const quat = new Quaternion().setFromUnitVectors( object.up, new Vector3( 0, 1, 0 ) );
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const quatInverse = quat.clone().invert();
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const lastPosition = new Vector3();
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const lastQuaternion = new Quaternion();
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const lastTargetPosition = new Vector3();
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const twoPI = 2 * Math.PI;
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return function update( deltaTime = null ) {
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const position = scope.object.position;
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offset.copy( position ).sub( scope.target );
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// rotate offset to "y-axis-is-up" space
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offset.applyQuaternion( quat );
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// angle from z-axis around y-axis
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spherical.setFromVector3( offset );
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if ( scope.autoRotate && state === STATE.NONE ) {
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rotateLeft( getAutoRotationAngle( deltaTime ) );
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}
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if ( scope.enableDamping ) {
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spherical.theta += sphericalDelta.theta * scope.dampingFactor;
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spherical.phi += sphericalDelta.phi * scope.dampingFactor;
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} else {
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spherical.theta += sphericalDelta.theta;
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spherical.phi += sphericalDelta.phi;
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}
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// restrict theta to be between desired limits
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let min = scope.minAzimuthAngle;
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let max = scope.maxAzimuthAngle;
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if ( isFinite( min ) && isFinite( max ) ) {
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if ( min < - Math.PI ) min += twoPI; else if ( min > Math.PI ) min -= twoPI;
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if ( max < - Math.PI ) max += twoPI; else if ( max > Math.PI ) max -= twoPI;
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if ( min <= max ) {
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spherical.theta = Math.max( min, Math.min( max, spherical.theta ) );
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} else {
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spherical.theta = ( spherical.theta > ( min + max ) / 2 ) ?
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Math.max( min, spherical.theta ) :
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Math.min( max, spherical.theta );
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}
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}
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// restrict phi to be between desired limits
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spherical.phi = Math.max( scope.minPolarAngle, Math.min( scope.maxPolarAngle, spherical.phi ) );
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spherical.makeSafe();
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// move target to panned location
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if ( scope.enableDamping === true ) {
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scope.target.addScaledVector( panOffset, scope.dampingFactor );
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} else {
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scope.target.add( panOffset );
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}
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// Limit the target distance from the cursor to create a sphere around the center of interest
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scope.target.sub( scope.cursor );
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scope.target.clampLength( scope.minTargetRadius, scope.maxTargetRadius );
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scope.target.add( scope.cursor );
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let zoomChanged = false;
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// adjust the camera position based on zoom only if we're not zooming to the cursor or if it's an ortho camera
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// we adjust zoom later in these cases
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if ( scope.zoomToCursor && performCursorZoom || scope.object.isOrthographicCamera ) {
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spherical.radius = clampDistance( spherical.radius );
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} else {
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const prevRadius = spherical.radius;
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spherical.radius = clampDistance( spherical.radius * scale );
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zoomChanged = prevRadius != spherical.radius;
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}
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offset.setFromSpherical( spherical );
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// rotate offset back to "camera-up-vector-is-up" space
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offset.applyQuaternion( quatInverse );
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position.copy( scope.target ).add( offset );
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scope.object.lookAt( scope.target );
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if ( scope.enableDamping === true ) {
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sphericalDelta.theta *= ( 1 - scope.dampingFactor );
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sphericalDelta.phi *= ( 1 - scope.dampingFactor );
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panOffset.multiplyScalar( 1 - scope.dampingFactor );
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} else {
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sphericalDelta.set( 0, 0, 0 );
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panOffset.set( 0, 0, 0 );
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}
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// adjust camera position
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if ( scope.zoomToCursor && performCursorZoom ) {
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let newRadius = null;
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if ( scope.object.isPerspectiveCamera ) {
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// move the camera down the pointer ray
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// this method avoids floating point error
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const prevRadius = offset.length();
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newRadius = clampDistance( prevRadius * scale );
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const radiusDelta = prevRadius - newRadius;
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scope.object.position.addScaledVector( dollyDirection, radiusDelta );
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scope.object.updateMatrixWorld();
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zoomChanged = !! radiusDelta;
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} else if ( scope.object.isOrthographicCamera ) {
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// adjust the ortho camera position based on zoom changes
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const mouseBefore = new Vector3( mouse.x, mouse.y, 0 );
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mouseBefore.unproject( scope.object );
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const prevZoom = scope.object.zoom;
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scope.object.zoom = Math.max( scope.minZoom, Math.min( scope.maxZoom, scope.object.zoom / scale ) );
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scope.object.updateProjectionMatrix();
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zoomChanged = prevZoom !== scope.object.zoom;
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const mouseAfter = new Vector3( mouse.x, mouse.y, 0 );
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mouseAfter.unproject( scope.object );
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scope.object.position.sub( mouseAfter ).add( mouseBefore );
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scope.object.updateMatrixWorld();
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newRadius = offset.length();
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} else {
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console.warn( 'WARNING: OrbitControls.js encountered an unknown camera type - zoom to cursor disabled.' );
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scope.zoomToCursor = false;
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}
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// handle the placement of the target
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if ( newRadius !== null ) {
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if ( this.screenSpacePanning ) {
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// position the orbit target in front of the new camera position
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scope.target.set( 0, 0, - 1 )
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.transformDirection( scope.object.matrix )
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.multiplyScalar( newRadius )
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.add( scope.object.position );
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} else {
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// get the ray and translation plane to compute target
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_ray.origin.copy( scope.object.position );
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_ray.direction.set( 0, 0, - 1 ).transformDirection( scope.object.matrix );
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// if the camera is 20 degrees above the horizon then don't adjust the focus target to avoid
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// extremely large values
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if ( Math.abs( scope.object.up.dot( _ray.direction ) ) < TILT_LIMIT ) {
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object.lookAt( scope.target );
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} else {
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_plane.setFromNormalAndCoplanarPoint( scope.object.up, scope.target );
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_ray.intersectPlane( _plane, scope.target );
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}
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}
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}
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} else if ( scope.object.isOrthographicCamera ) {
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const prevZoom = scope.object.zoom;
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scope.object.zoom = Math.max( scope.minZoom, Math.min( scope.maxZoom, scope.object.zoom / scale ) );
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if ( prevZoom !== scope.object.zoom ) {
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scope.object.updateProjectionMatrix();
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zoomChanged = true;
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}
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}
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scale = 1;
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performCursorZoom = false;
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// update condition is:
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// min(camera displacement, camera rotation in radians)^2 > EPS
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// using small-angle approximation cos(x/2) = 1 - x^2 / 8
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if ( zoomChanged ||
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lastPosition.distanceToSquared( scope.object.position ) > EPS ||
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8 * ( 1 - lastQuaternion.dot( scope.object.quaternion ) ) > EPS ||
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lastTargetPosition.distanceToSquared( scope.target ) > EPS ) {
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scope.dispatchEvent( _changeEvent );
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lastPosition.copy( scope.object.position );
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lastQuaternion.copy( scope.object.quaternion );
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lastTargetPosition.copy( scope.target );
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return true;
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}
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return false;
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};
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}();
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this.dispose = function () {
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scope.domElement.removeEventListener( 'contextmenu', onContextMenu );
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scope.domElement.removeEventListener( 'pointerdown', onPointerDown );
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scope.domElement.removeEventListener( 'pointercancel', onPointerUp );
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scope.domElement.removeEventListener( 'wheel', onMouseWheel );
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scope.domElement.removeEventListener( 'pointermove', onPointerMove );
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scope.domElement.removeEventListener( 'pointerup', onPointerUp );
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const document = scope.domElement.getRootNode(); // offscreen canvas compatibility
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document.removeEventListener( 'keydown', interceptControlDown, { capture: true } );
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if ( scope._domElementKeyEvents !== null ) {
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scope._domElementKeyEvents.removeEventListener( 'keydown', onKeyDown );
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scope._domElementKeyEvents = null;
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}
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//scope.dispatchEvent( { type: 'dispose' } ); // should this be added here?
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};
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//
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// internals
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//
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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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DOLLY: 1,
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PAN: 2,
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TOUCH_ROTATE: 3,
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TOUCH_PAN: 4,
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TOUCH_DOLLY_PAN: 5,
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TOUCH_DOLLY_ROTATE: 6
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};
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let state = STATE.NONE;
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const EPS = 0.000001;
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// current position in spherical coordinates
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const spherical = new Spherical();
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const sphericalDelta = new Spherical();
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let scale = 1;
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const panOffset = new Vector3();
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const rotateStart = new Vector2();
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const rotateEnd = new Vector2();
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const rotateDelta = new Vector2();
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const panStart = new Vector2();
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const panEnd = new Vector2();
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const panDelta = new Vector2();
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const dollyStart = new Vector2();
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const dollyEnd = new Vector2();
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const dollyDelta = new Vector2();
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const dollyDirection = new Vector3();
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const mouse = new Vector2();
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let performCursorZoom = false;
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const pointers = [];
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const pointerPositions = {};
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let controlActive = false;
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function getAutoRotationAngle( deltaTime ) {
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if ( deltaTime !== null ) {
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return ( 2 * Math.PI / 60 * scope.autoRotateSpeed ) * deltaTime;
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} else {
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return 2 * Math.PI / 60 / 60 * scope.autoRotateSpeed;
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}
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}
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function getZoomScale( delta ) {
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const normalizedDelta = Math.abs( delta * 0.01 );
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return Math.pow( 0.95, scope.zoomSpeed * normalizedDelta );
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}
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function rotateLeft( angle ) {
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sphericalDelta.theta -= angle;
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}
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function rotateUp( angle ) {
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sphericalDelta.phi -= angle;
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}
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const panLeft = function () {
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const v = new Vector3();
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return function panLeft( distance, objectMatrix ) {
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v.setFromMatrixColumn( objectMatrix, 0 ); // get X column of objectMatrix
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v.multiplyScalar( - distance );
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panOffset.add( v );
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};
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}();
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const panUp = function () {
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const v = new Vector3();
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return function panUp( distance, objectMatrix ) {
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if ( scope.screenSpacePanning === true ) {
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v.setFromMatrixColumn( objectMatrix, 1 );
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} else {
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v.setFromMatrixColumn( objectMatrix, 0 );
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v.crossVectors( scope.object.up, v );
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}
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v.multiplyScalar( distance );
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panOffset.add( v );
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};
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}();
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// deltaX and deltaY are in pixels; right and down are positive
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const pan = function () {
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const offset = new Vector3();
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return function pan( deltaX, deltaY ) {
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const element = scope.domElement;
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if ( scope.object.isPerspectiveCamera ) {
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// perspective
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const position = scope.object.position;
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offset.copy( position ).sub( scope.target );
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let targetDistance = offset.length();
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// half of the fov is center to top of screen
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targetDistance *= Math.tan( ( scope.object.fov / 2 ) * Math.PI / 180.0 );
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// we use only clientHeight here so aspect ratio does not distort speed
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panLeft( 2 * deltaX * targetDistance / element.clientHeight, scope.object.matrix );
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panUp( 2 * deltaY * targetDistance / element.clientHeight, scope.object.matrix );
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} else if ( scope.object.isOrthographicCamera ) {
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|
// orthographic
|
|
panLeft( deltaX * ( scope.object.right - scope.object.left ) / scope.object.zoom / element.clientWidth, scope.object.matrix );
|
|
panUp( deltaY * ( scope.object.top - scope.object.bottom ) / scope.object.zoom / element.clientHeight, scope.object.matrix );
|
|
|
|
} else {
|
|
|
|
// camera neither orthographic nor perspective
|
|
console.warn( 'WARNING: OrbitControls.js encountered an unknown camera type - pan disabled.' );
|
|
scope.enablePan = false;
|
|
|
|
}
|
|
|
|
};
|
|
|
|
}();
|
|
|
|
function dollyOut( dollyScale ) {
|
|
|
|
if ( scope.object.isPerspectiveCamera || scope.object.isOrthographicCamera ) {
|
|
|
|
scale /= dollyScale;
|
|
|
|
} else {
|
|
|
|
console.warn( 'WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.' );
|
|
scope.enableZoom = false;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function dollyIn( dollyScale ) {
|
|
|
|
if ( scope.object.isPerspectiveCamera || scope.object.isOrthographicCamera ) {
|
|
|
|
scale *= dollyScale;
|
|
|
|
} else {
|
|
|
|
console.warn( 'WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.' );
|
|
scope.enableZoom = false;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function updateZoomParameters( x, y ) {
|
|
|
|
if ( ! scope.zoomToCursor ) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
performCursorZoom = true;
|
|
|
|
const rect = scope.domElement.getBoundingClientRect();
|
|
const dx = x - rect.left;
|
|
const dy = y - rect.top;
|
|
const w = rect.width;
|
|
const h = rect.height;
|
|
|
|
mouse.x = ( dx / w ) * 2 - 1;
|
|
mouse.y = - ( dy / h ) * 2 + 1;
|
|
|
|
dollyDirection.set( mouse.x, mouse.y, 1 ).unproject( scope.object ).sub( scope.object.position ).normalize();
|
|
|
|
}
|
|
|
|
function clampDistance( dist ) {
|
|
|
|
return Math.max( scope.minDistance, Math.min( scope.maxDistance, dist ) );
|
|
|
|
}
|
|
|
|
//
|
|
// event callbacks - update the object state
|
|
//
|
|
|
|
function handleMouseDownRotate( event ) {
|
|
|
|
rotateStart.set( event.clientX, event.clientY );
|
|
|
|
}
|
|
|
|
function handleMouseDownDolly( event ) {
|
|
|
|
updateZoomParameters( event.clientX, event.clientX );
|
|
dollyStart.set( event.clientX, event.clientY );
|
|
|
|
}
|
|
|
|
function handleMouseDownPan( event ) {
|
|
|
|
panStart.set( event.clientX, event.clientY );
|
|
|
|
}
|
|
|
|
function handleMouseMoveRotate( event ) {
|
|
|
|
rotateEnd.set( event.clientX, event.clientY );
|
|
|
|
rotateDelta.subVectors( rotateEnd, rotateStart ).multiplyScalar( scope.rotateSpeed );
|
|
|
|
const element = scope.domElement;
|
|
|
|
rotateLeft( 2 * Math.PI * rotateDelta.x / element.clientHeight ); // yes, height
|
|
|
|
rotateUp( 2 * Math.PI * rotateDelta.y / element.clientHeight );
|
|
|
|
rotateStart.copy( rotateEnd );
|
|
|
|
scope.update();
|
|
|
|
}
|
|
|
|
function handleMouseMoveDolly( event ) {
|
|
|
|
dollyEnd.set( event.clientX, event.clientY );
|
|
|
|
dollyDelta.subVectors( dollyEnd, dollyStart );
|
|
|
|
if ( dollyDelta.y > 0 ) {
|
|
|
|
dollyOut( getZoomScale( dollyDelta.y ) );
|
|
|
|
} else if ( dollyDelta.y < 0 ) {
|
|
|
|
dollyIn( getZoomScale( dollyDelta.y ) );
|
|
|
|
}
|
|
|
|
dollyStart.copy( dollyEnd );
|
|
|
|
scope.update();
|
|
|
|
}
|
|
|
|
function handleMouseMovePan( event ) {
|
|
|
|
panEnd.set( event.clientX, event.clientY );
|
|
|
|
panDelta.subVectors( panEnd, panStart ).multiplyScalar( scope.panSpeed );
|
|
|
|
pan( panDelta.x, panDelta.y );
|
|
|
|
panStart.copy( panEnd );
|
|
|
|
scope.update();
|
|
|
|
}
|
|
|
|
function handleMouseWheel( event ) {
|
|
|
|
updateZoomParameters( event.clientX, event.clientY );
|
|
|
|
if ( event.deltaY < 0 ) {
|
|
|
|
dollyIn( getZoomScale( event.deltaY ) );
|
|
|
|
} else if ( event.deltaY > 0 ) {
|
|
|
|
dollyOut( getZoomScale( event.deltaY ) );
|
|
|
|
}
|
|
|
|
scope.update();
|
|
|
|
}
|
|
|
|
function handleKeyDown( event ) {
|
|
|
|
let needsUpdate = false;
|
|
|
|
switch ( event.code ) {
|
|
|
|
case scope.keys.UP:
|
|
|
|
if ( event.ctrlKey || event.metaKey || event.shiftKey ) {
|
|
|
|
rotateUp( 2 * Math.PI * scope.rotateSpeed / scope.domElement.clientHeight );
|
|
|
|
} else {
|
|
|
|
pan( 0, scope.keyPanSpeed );
|
|
|
|
}
|
|
|
|
needsUpdate = true;
|
|
break;
|
|
|
|
case scope.keys.BOTTOM:
|
|
|
|
if ( event.ctrlKey || event.metaKey || event.shiftKey ) {
|
|
|
|
rotateUp( - 2 * Math.PI * scope.rotateSpeed / scope.domElement.clientHeight );
|
|
|
|
} else {
|
|
|
|
pan( 0, - scope.keyPanSpeed );
|
|
|
|
}
|
|
|
|
needsUpdate = true;
|
|
break;
|
|
|
|
case scope.keys.LEFT:
|
|
|
|
if ( event.ctrlKey || event.metaKey || event.shiftKey ) {
|
|
|
|
rotateLeft( 2 * Math.PI * scope.rotateSpeed / scope.domElement.clientHeight );
|
|
|
|
} else {
|
|
|
|
pan( scope.keyPanSpeed, 0 );
|
|
|
|
}
|
|
|
|
needsUpdate = true;
|
|
break;
|
|
|
|
case scope.keys.RIGHT:
|
|
|
|
if ( event.ctrlKey || event.metaKey || event.shiftKey ) {
|
|
|
|
rotateLeft( - 2 * Math.PI * scope.rotateSpeed / scope.domElement.clientHeight );
|
|
|
|
} else {
|
|
|
|
pan( - scope.keyPanSpeed, 0 );
|
|
|
|
}
|
|
|
|
needsUpdate = true;
|
|
break;
|
|
|
|
}
|
|
|
|
if ( needsUpdate ) {
|
|
|
|
// prevent the browser from scrolling on cursor keys
|
|
event.preventDefault();
|
|
|
|
scope.update();
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
function handleTouchStartRotate( event ) {
|
|
|
|
if ( pointers.length === 1 ) {
|
|
|
|
rotateStart.set( event.pageX, event.pageY );
|
|
|
|
} else {
|
|
|
|
const position = getSecondPointerPosition( event );
|
|
|
|
const x = 0.5 * ( event.pageX + position.x );
|
|
const y = 0.5 * ( event.pageY + position.y );
|
|
|
|
rotateStart.set( x, y );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function handleTouchStartPan( event ) {
|
|
|
|
if ( pointers.length === 1 ) {
|
|
|
|
panStart.set( event.pageX, event.pageY );
|
|
|
|
} else {
|
|
|
|
const position = getSecondPointerPosition( event );
|
|
|
|
const x = 0.5 * ( event.pageX + position.x );
|
|
const y = 0.5 * ( event.pageY + position.y );
|
|
|
|
panStart.set( x, y );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function handleTouchStartDolly( event ) {
|
|
|
|
const position = getSecondPointerPosition( event );
|
|
|
|
const dx = event.pageX - position.x;
|
|
const dy = event.pageY - position.y;
|
|
|
|
const distance = Math.sqrt( dx * dx + dy * dy );
|
|
|
|
dollyStart.set( 0, distance );
|
|
|
|
}
|
|
|
|
function handleTouchStartDollyPan( event ) {
|
|
|
|
if ( scope.enableZoom ) handleTouchStartDolly( event );
|
|
|
|
if ( scope.enablePan ) handleTouchStartPan( event );
|
|
|
|
}
|
|
|
|
function handleTouchStartDollyRotate( event ) {
|
|
|
|
if ( scope.enableZoom ) handleTouchStartDolly( event );
|
|
|
|
if ( scope.enableRotate ) handleTouchStartRotate( event );
|
|
|
|
}
|
|
|
|
function handleTouchMoveRotate( event ) {
|
|
|
|
if ( pointers.length == 1 ) {
|
|
|
|
rotateEnd.set( event.pageX, event.pageY );
|
|
|
|
} else {
|
|
|
|
const position = getSecondPointerPosition( event );
|
|
|
|
const x = 0.5 * ( event.pageX + position.x );
|
|
const y = 0.5 * ( event.pageY + position.y );
|
|
|
|
rotateEnd.set( x, y );
|
|
|
|
}
|
|
|
|
rotateDelta.subVectors( rotateEnd, rotateStart ).multiplyScalar( scope.rotateSpeed );
|
|
|
|
const element = scope.domElement;
|
|
|
|
rotateLeft( 2 * Math.PI * rotateDelta.x / element.clientHeight ); // yes, height
|
|
|
|
rotateUp( 2 * Math.PI * rotateDelta.y / element.clientHeight );
|
|
|
|
rotateStart.copy( rotateEnd );
|
|
|
|
}
|
|
|
|
function handleTouchMovePan( event ) {
|
|
|
|
if ( pointers.length === 1 ) {
|
|
|
|
panEnd.set( event.pageX, event.pageY );
|
|
|
|
} else {
|
|
|
|
const position = getSecondPointerPosition( event );
|
|
|
|
const x = 0.5 * ( event.pageX + position.x );
|
|
const y = 0.5 * ( event.pageY + position.y );
|
|
|
|
panEnd.set( x, y );
|
|
|
|
}
|
|
|
|
panDelta.subVectors( panEnd, panStart ).multiplyScalar( scope.panSpeed );
|
|
|
|
pan( panDelta.x, panDelta.y );
|
|
|
|
panStart.copy( panEnd );
|
|
|
|
}
|
|
|
|
function handleTouchMoveDolly( event ) {
|
|
|
|
const position = getSecondPointerPosition( event );
|
|
|
|
const dx = event.pageX - position.x;
|
|
const dy = event.pageY - position.y;
|
|
|
|
const distance = Math.sqrt( dx * dx + dy * dy );
|
|
|
|
dollyEnd.set( 0, distance );
|
|
|
|
dollyDelta.set( 0, Math.pow( dollyEnd.y / dollyStart.y, scope.zoomSpeed ) );
|
|
|
|
dollyOut( dollyDelta.y );
|
|
|
|
dollyStart.copy( dollyEnd );
|
|
|
|
const centerX = ( event.pageX + position.x ) * 0.5;
|
|
const centerY = ( event.pageY + position.y ) * 0.5;
|
|
|
|
updateZoomParameters( centerX, centerY );
|
|
|
|
}
|
|
|
|
function handleTouchMoveDollyPan( event ) {
|
|
|
|
if ( scope.enableZoom ) handleTouchMoveDolly( event );
|
|
|
|
if ( scope.enablePan ) handleTouchMovePan( event );
|
|
|
|
}
|
|
|
|
function handleTouchMoveDollyRotate( event ) {
|
|
|
|
if ( scope.enableZoom ) handleTouchMoveDolly( event );
|
|
|
|
if ( scope.enableRotate ) handleTouchMoveRotate( event );
|
|
|
|
}
|
|
|
|
//
|
|
// event handlers - FSM: listen for events and reset state
|
|
//
|
|
|
|
function onPointerDown( event ) {
|
|
|
|
if ( scope.enabled === false ) return;
|
|
|
|
if ( pointers.length === 0 ) {
|
|
|
|
scope.domElement.setPointerCapture( event.pointerId );
|
|
|
|
scope.domElement.addEventListener( 'pointermove', onPointerMove );
|
|
scope.domElement.addEventListener( 'pointerup', onPointerUp );
|
|
|
|
}
|
|
|
|
//
|
|
|
|
if ( isTrackingPointer( event ) ) return;
|
|
|
|
//
|
|
|
|
addPointer( event );
|
|
|
|
if ( event.pointerType === 'touch' ) {
|
|
|
|
onTouchStart( event );
|
|
|
|
} else {
|
|
|
|
onMouseDown( event );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function onPointerMove( event ) {
|
|
|
|
if ( scope.enabled === false ) return;
|
|
|
|
if ( event.pointerType === 'touch' ) {
|
|
|
|
onTouchMove( event );
|
|
|
|
} else {
|
|
|
|
onMouseMove( event );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function onPointerUp( event ) {
|
|
|
|
removePointer( event );
|
|
|
|
switch ( pointers.length ) {
|
|
|
|
case 0:
|
|
|
|
scope.domElement.releasePointerCapture( event.pointerId );
|
|
|
|
scope.domElement.removeEventListener( 'pointermove', onPointerMove );
|
|
scope.domElement.removeEventListener( 'pointerup', onPointerUp );
|
|
|
|
scope.dispatchEvent( _endEvent );
|
|
|
|
state = STATE.NONE;
|
|
|
|
break;
|
|
|
|
case 1:
|
|
|
|
const pointerId = pointers[ 0 ];
|
|
const position = pointerPositions[ pointerId ];
|
|
|
|
// minimal placeholder event - allows state correction on pointer-up
|
|
onTouchStart( { pointerId: pointerId, pageX: position.x, pageY: position.y } );
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function onMouseDown( event ) {
|
|
|
|
let mouseAction;
|
|
|
|
switch ( event.button ) {
|
|
|
|
case 0:
|
|
|
|
mouseAction = scope.mouseButtons.LEFT;
|
|
break;
|
|
|
|
case 1:
|
|
|
|
mouseAction = scope.mouseButtons.MIDDLE;
|
|
break;
|
|
|
|
case 2:
|
|
|
|
mouseAction = scope.mouseButtons.RIGHT;
|
|
break;
|
|
|
|
default:
|
|
|
|
mouseAction = - 1;
|
|
|
|
}
|
|
|
|
switch ( mouseAction ) {
|
|
|
|
case MOUSE.DOLLY:
|
|
|
|
if ( scope.enableZoom === false ) return;
|
|
|
|
handleMouseDownDolly( event );
|
|
|
|
state = STATE.DOLLY;
|
|
|
|
break;
|
|
|
|
case MOUSE.ROTATE:
|
|
|
|
if ( event.ctrlKey || event.metaKey || event.shiftKey ) {
|
|
|
|
if ( scope.enablePan === false ) return;
|
|
|
|
handleMouseDownPan( event );
|
|
|
|
state = STATE.PAN;
|
|
|
|
} else {
|
|
|
|
if ( scope.enableRotate === false ) return;
|
|
|
|
handleMouseDownRotate( event );
|
|
|
|
state = STATE.ROTATE;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case MOUSE.PAN:
|
|
|
|
if ( event.ctrlKey || event.metaKey || event.shiftKey ) {
|
|
|
|
if ( scope.enableRotate === false ) return;
|
|
|
|
handleMouseDownRotate( event );
|
|
|
|
state = STATE.ROTATE;
|
|
|
|
} else {
|
|
|
|
if ( scope.enablePan === false ) return;
|
|
|
|
handleMouseDownPan( event );
|
|
|
|
state = STATE.PAN;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
state = STATE.NONE;
|
|
|
|
}
|
|
|
|
if ( state !== STATE.NONE ) {
|
|
|
|
scope.dispatchEvent( _startEvent );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function onMouseMove( event ) {
|
|
|
|
switch ( state ) {
|
|
|
|
case STATE.ROTATE:
|
|
|
|
if ( scope.enableRotate === false ) return;
|
|
|
|
handleMouseMoveRotate( event );
|
|
|
|
break;
|
|
|
|
case STATE.DOLLY:
|
|
|
|
if ( scope.enableZoom === false ) return;
|
|
|
|
handleMouseMoveDolly( event );
|
|
|
|
break;
|
|
|
|
case STATE.PAN:
|
|
|
|
if ( scope.enablePan === false ) return;
|
|
|
|
handleMouseMovePan( event );
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function onMouseWheel( event ) {
|
|
|
|
if ( scope.enabled === false || scope.enableZoom === false || state !== STATE.NONE ) return;
|
|
|
|
event.preventDefault();
|
|
|
|
scope.dispatchEvent( _startEvent );
|
|
|
|
handleMouseWheel( customWheelEvent( event ) );
|
|
|
|
scope.dispatchEvent( _endEvent );
|
|
|
|
}
|
|
|
|
function customWheelEvent( event ) {
|
|
|
|
const mode = event.deltaMode;
|
|
|
|
// minimal wheel event altered to meet delta-zoom demand
|
|
const newEvent = {
|
|
clientX: event.clientX,
|
|
clientY: event.clientY,
|
|
deltaY: event.deltaY,
|
|
};
|
|
|
|
switch ( mode ) {
|
|
|
|
case 1: // LINE_MODE
|
|
newEvent.deltaY *= 16;
|
|
break;
|
|
|
|
case 2: // PAGE_MODE
|
|
newEvent.deltaY *= 100;
|
|
break;
|
|
|
|
}
|
|
|
|
// detect if event was triggered by pinching
|
|
if ( event.ctrlKey && ! controlActive ) {
|
|
|
|
newEvent.deltaY *= 10;
|
|
|
|
}
|
|
|
|
return newEvent;
|
|
|
|
}
|
|
|
|
function interceptControlDown( event ) {
|
|
|
|
if ( event.key === 'Control' ) {
|
|
|
|
controlActive = true;
|
|
|
|
|
|
const document = scope.domElement.getRootNode(); // offscreen canvas compatibility
|
|
|
|
document.addEventListener( 'keyup', interceptControlUp, { passive: true, capture: true } );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function interceptControlUp( event ) {
|
|
|
|
if ( event.key === 'Control' ) {
|
|
|
|
controlActive = false;
|
|
|
|
|
|
const document = scope.domElement.getRootNode(); // offscreen canvas compatibility
|
|
|
|
document.removeEventListener( 'keyup', interceptControlUp, { passive: true, capture: true } );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function onKeyDown( event ) {
|
|
|
|
if ( scope.enabled === false || scope.enablePan === false ) return;
|
|
|
|
handleKeyDown( event );
|
|
|
|
}
|
|
|
|
function onTouchStart( event ) {
|
|
|
|
trackPointer( event );
|
|
|
|
switch ( pointers.length ) {
|
|
|
|
case 1:
|
|
|
|
switch ( scope.touches.ONE ) {
|
|
|
|
case TOUCH.ROTATE:
|
|
|
|
if ( scope.enableRotate === false ) return;
|
|
|
|
handleTouchStartRotate( event );
|
|
|
|
state = STATE.TOUCH_ROTATE;
|
|
|
|
break;
|
|
|
|
case TOUCH.PAN:
|
|
|
|
if ( scope.enablePan === false ) return;
|
|
|
|
handleTouchStartPan( event );
|
|
|
|
state = STATE.TOUCH_PAN;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
state = STATE.NONE;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case 2:
|
|
|
|
switch ( scope.touches.TWO ) {
|
|
|
|
case TOUCH.DOLLY_PAN:
|
|
|
|
if ( scope.enableZoom === false && scope.enablePan === false ) return;
|
|
|
|
handleTouchStartDollyPan( event );
|
|
|
|
state = STATE.TOUCH_DOLLY_PAN;
|
|
|
|
break;
|
|
|
|
case TOUCH.DOLLY_ROTATE:
|
|
|
|
if ( scope.enableZoom === false && scope.enableRotate === false ) return;
|
|
|
|
handleTouchStartDollyRotate( event );
|
|
|
|
state = STATE.TOUCH_DOLLY_ROTATE;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
state = STATE.NONE;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
state = STATE.NONE;
|
|
|
|
}
|
|
|
|
if ( state !== STATE.NONE ) {
|
|
|
|
scope.dispatchEvent( _startEvent );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function onTouchMove( event ) {
|
|
|
|
trackPointer( event );
|
|
|
|
switch ( state ) {
|
|
|
|
case STATE.TOUCH_ROTATE:
|
|
|
|
if ( scope.enableRotate === false ) return;
|
|
|
|
handleTouchMoveRotate( event );
|
|
|
|
scope.update();
|
|
|
|
break;
|
|
|
|
case STATE.TOUCH_PAN:
|
|
|
|
if ( scope.enablePan === false ) return;
|
|
|
|
handleTouchMovePan( event );
|
|
|
|
scope.update();
|
|
|
|
break;
|
|
|
|
case STATE.TOUCH_DOLLY_PAN:
|
|
|
|
if ( scope.enableZoom === false && scope.enablePan === false ) return;
|
|
|
|
handleTouchMoveDollyPan( event );
|
|
|
|
scope.update();
|
|
|
|
break;
|
|
|
|
case STATE.TOUCH_DOLLY_ROTATE:
|
|
|
|
if ( scope.enableZoom === false && scope.enableRotate === false ) return;
|
|
|
|
handleTouchMoveDollyRotate( event );
|
|
|
|
scope.update();
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
state = STATE.NONE;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function onContextMenu( event ) {
|
|
|
|
if ( scope.enabled === false ) return;
|
|
|
|
event.preventDefault();
|
|
|
|
}
|
|
|
|
function addPointer( event ) {
|
|
|
|
pointers.push( event.pointerId );
|
|
|
|
}
|
|
|
|
function removePointer( event ) {
|
|
|
|
delete pointerPositions[ event.pointerId ];
|
|
|
|
for ( let i = 0; i < pointers.length; i ++ ) {
|
|
|
|
if ( pointers[ i ] == event.pointerId ) {
|
|
|
|
pointers.splice( i, 1 );
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function isTrackingPointer( event ) {
|
|
|
|
for ( let i = 0; i < pointers.length; i ++ ) {
|
|
|
|
if ( pointers[ i ] == event.pointerId ) return true;
|
|
|
|
}
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
function trackPointer( event ) {
|
|
|
|
let position = pointerPositions[ event.pointerId ];
|
|
|
|
if ( position === undefined ) {
|
|
|
|
position = new Vector2();
|
|
pointerPositions[ event.pointerId ] = position;
|
|
|
|
}
|
|
|
|
position.set( event.pageX, event.pageY );
|
|
|
|
}
|
|
|
|
function getSecondPointerPosition( event ) {
|
|
|
|
const pointerId = ( event.pointerId === pointers[ 0 ] ) ? pointers[ 1 ] : pointers[ 0 ];
|
|
|
|
return pointerPositions[ pointerId ];
|
|
|
|
}
|
|
|
|
//
|
|
|
|
scope.domElement.addEventListener( 'contextmenu', onContextMenu );
|
|
|
|
scope.domElement.addEventListener( 'pointerdown', onPointerDown );
|
|
scope.domElement.addEventListener( 'pointercancel', onPointerUp );
|
|
scope.domElement.addEventListener( 'wheel', onMouseWheel, { passive: false } );
|
|
|
|
const document = scope.domElement.getRootNode(); // offscreen canvas compatibility
|
|
|
|
document.addEventListener( 'keydown', interceptControlDown, { passive: true, capture: true } );
|
|
|
|
// force an update at start
|
|
|
|
this.update();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
export { OrbitControls };
|