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CameraControls.ts
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CameraControls.ts
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import type * as _THREE from 'three';
import {
THREESubset,
ACTION,
PointerInput,
MouseButtons,
Touches,
FitToOptions,
CameraControlsEventMap,
isPerspectiveCamera,
isOrthographicCamera,
} from './types';
import {
PI_2,
PI_HALF,
} from './constants';
import {
approxZero,
approxEquals,
roundToStep,
infinityToMaxNumber,
maxNumberToInfinity,
} from './utils/math-utils';
import { extractClientCoordFromEvent } from './utils/extractClientCoordFromEvent';
import { notSupportedInOrthographicCamera } from './utils/notSupportedInOrthographicCamera';
import { quatInvertCompat } from './utils/quatInvertCompat';
import { EventDispatcher, Listener } from './EventDispatcher';
const isBrowser = typeof window !== 'undefined';
const isMac = isBrowser && /Mac/.test( navigator.platform );
const isPointerEventsNotSupported = ! ( isBrowser && 'PointerEvent' in window ); // Safari 12 does not support PointerEvents API
const readonlyACTION = Object.freeze( ACTION );
const TOUCH_DOLLY_FACTOR = 1 / 8;
let THREE: THREESubset;
let _ORIGIN: _THREE.Vector3;
let _AXIS_Y: _THREE.Vector3;
let _AXIS_Z: _THREE.Vector3;
let _v2: _THREE.Vector2;
let _v3A: _THREE.Vector3;
let _v3B: _THREE.Vector3;
let _v3C: _THREE.Vector3;
let _xColumn: _THREE.Vector3;
let _yColumn: _THREE.Vector3;
let _zColumn: _THREE.Vector3;
let _deltaTarget: _THREE.Vector3;
let _deltaOffset: _THREE.Vector3;
let _sphericalA: _THREE.Spherical;
let _sphericalB: _THREE.Spherical;
let _box3A: _THREE.Box3;
let _box3B: _THREE.Box3;
let _sphere: _THREE.Sphere;
let _quaternionA: _THREE.Quaternion;
let _quaternionB: _THREE.Quaternion;
let _rotationMatrix: _THREE.Matrix4;
let _raycaster: _THREE.Raycaster;
export class CameraControls extends EventDispatcher {
/**
* Injects THREE as the dependency. You can then proceed to use CameraControls.
*
* e.g
* ```javascript
* CameraControls.install( { THREE: THREE } );
* ```
*
* Note: If you do not wish to use enter three.js to reduce file size(tree-shaking for example), make a subset to install.
*
* ```js
* import {
* MOUSE,
* Vector2,
* Vector3,
* Vector4,
* Quaternion,
* Matrix4,
* Spherical,
* Box3,
* Sphere,
* Raycaster,
* MathUtils,
* } from 'three';
*
* const subsetOfTHREE = {
* MOUSE : MOUSE,
* Vector2 : Vector2,
* Vector3 : Vector3,
* Vector4 : Vector4,
* Quaternion: Quaternion,
* Matrix4 : Matrix4,
* Spherical : Spherical,
* Box3 : Box3,
* Sphere : Sphere,
* Raycaster : Raycaster,
* MathUtils : {
* DEG2RAD: MathUtils.DEG2RAD,
* clamp: MathUtils.clamp,
* },
* };
* CameraControls.install( { THREE: subsetOfTHREE } );
* ```
* @category Statics
*/
static install( libs: { THREE: THREESubset } ): void {
THREE = libs.THREE;
_ORIGIN = Object.freeze( new THREE.Vector3( 0, 0, 0 ) );
_AXIS_Y = Object.freeze( new THREE.Vector3( 0, 1, 0 ) );
_AXIS_Z = Object.freeze( new THREE.Vector3( 0, 0, 1 ) );
_v2 = new THREE.Vector2();
_v3A = new THREE.Vector3();
_v3B = new THREE.Vector3();
_v3C = new THREE.Vector3();
_xColumn = new THREE.Vector3();
_yColumn = new THREE.Vector3();
_zColumn = new THREE.Vector3();
_deltaTarget = new THREE.Vector3();
_deltaOffset = new THREE.Vector3();
_sphericalA = new THREE.Spherical();
_sphericalB = new THREE.Spherical();
_box3A = new THREE.Box3();
_box3B = new THREE.Box3();
_sphere = new THREE.Sphere();
_quaternionA = new THREE.Quaternion();
_quaternionB = new THREE.Quaternion();
_rotationMatrix = new THREE.Matrix4();
_raycaster = new THREE.Raycaster();
}
/**
* list all ACTIONs
* @category Statics
*/
static get ACTION(): Readonly<typeof ACTION> {
return readonlyACTION;
}
/**
* Minimum vertical angle in radians.
* The angle has to be between `0` and `.maxPolarAngle` inclusive.
* The default value is `0`.
*
* e.g.
* ```
* cameraControls.maxPolarAngle = 0;
* ```
* @category Properties
*/
minPolarAngle = 0; // radians
/**
* Maximum vertical angle in radians.
* The angle has to be between `.maxPolarAngle` and `Math.PI` inclusive.
* The default value is `Math.PI`.
*
* e.g.
* ```
* cameraControls.maxPolarAngle = Math.PI;
* ```
* @category Properties
*/
maxPolarAngle = Math.PI; // radians
/**
* Minimum horizontal angle in radians.
* The angle has to be less than `.maxAzimuthAngle`.
* The default value is `- Infinity`.
*
* e.g.
* ```
* cameraControls.minAzimuthAngle = - Infinity;
* ```
* @category Properties
*/
minAzimuthAngle = - Infinity; // radians
/**
* Maximum horizontal angle in radians.
* The angle has to be greater than `.minAzimuthAngle`.
* The default value is `Infinity`.
*
* e.g.
* ```
* cameraControls.maxAzimuthAngle = Infinity;
* ```
* @category Properties
*/
maxAzimuthAngle = Infinity; // radians
// How far you can dolly in and out ( PerspectiveCamera only )
/**
* Minimum distance for dolly. The value must be higher than `0`.
* PerspectiveCamera only.
* @category Properties
*/
minDistance = 0;
/**
* Maximum distance for dolly. The value must be higher than `minDistance`.
* PerspectiveCamera only.
* @category Properties
*/
maxDistance = Infinity;
/**
* `true` to enable Infinity Dolly.
* When the Dolly distance is less than the `minDistance`, radius of the sphere will be set `minDistance` automatically.
* @category Properties
*/
infinityDolly = false;
/**
* Minimum camera zoom.
* @category Properties
*/
minZoom = 0.01;
/**
* Maximum camera zoom.
* @category Properties
*/
maxZoom = Infinity;
/**
* The damping inertia.
* The value must be between `Math.EPSILON` to `1` inclusive.
* Setting `1` to disable smooth transitions.
* @category Properties
*/
dampingFactor = 0.05;
/**
* The damping inertia while dragging.
* The value must be between `Math.EPSILON` to `1` inclusive.
* Setting `1` to disable smooth transitions.
* @category Properties
*/
draggingDampingFactor = 0.25;
/**
* Speed of azimuth (horizontal) rotation.
* @category Properties
*/
azimuthRotateSpeed = 1.0;
/**
* Speed of polar (vertical) rotation.
* @category Properties
*/
polarRotateSpeed = 1.0;
/**
* Speed of mouse-wheel dollying.
* @category Properties
*/
dollySpeed = 1.0;
/**
* Speed of drag for truck and pedestal.
* @category Properties
*/
truckSpeed = 2.0;
/**
* `true` to enable Dolly-in to the mouse cursor coords.
* @category Properties
*/
dollyToCursor = false;
/**
* @category Properties
*/
dragToOffset = false;
/**
* The same as `.screenSpacePanning` in three.js's OrbitControls.
* @category Properties
*/
verticalDragToForward = false;
/**
* Friction ratio of the boundary.
* @category Properties
*/
boundaryFriction = 0.0;
/**
* Controls how soon the `rest` event fires as the camera slows.
* @category Properties
*/
restThreshold = 0.01;
/**
* An array of Meshes to collide with camera.
* Be aware colliderMeshes may decrease performance. The collision test uses 4 raycasters from the camera since the near plane has 4 corners.
* @category Properties
*/
colliderMeshes: _THREE.Object3D[] = [];
// button configs
/**
* User's mouse input config.
*
* | button to assign | behavior |
* | --------------------- | -------- |
* | `mouseButtons.left` | `CameraControls.ACTION.ROTATE`* \| `CameraControls.ACTION.TRUCK` \| `CameraControls.ACTION.OFFSET` \| `CameraControls.ACTION.DOLLY` \| `CameraControls.ACTION.ZOOM` \| `CameraControls.ACTION.NONE` |
* | `mouseButtons.right` | `CameraControls.ACTION.ROTATE` \| `CameraControls.ACTION.TRUCK`* \| `CameraControls.ACTION.OFFSET` \| `CameraControls.ACTION.DOLLY` \| `CameraControls.ACTION.ZOOM` \| `CameraControls.ACTION.NONE` |
* | `mouseButtons.shiftLeft` | `CameraControls.ACTION.ROTATE` \| `CameraControls.ACTION.TRUCK` \| `CameraControls.ACTION.OFFSET` \| `CameraControls.ACTION.DOLLY` \| `CameraControls.ACTION.ZOOM` \| `CameraControls.ACTION.NONE`* |
* | `mouseButtons.wheel` ¹ | `CameraControls.ACTION.ROTATE` \| `CameraControls.ACTION.TRUCK` \| `CameraControls.ACTION.OFFSET` \| `CameraControls.ACTION.DOLLY` \| `CameraControls.ACTION.ZOOM` \| `CameraControls.ACTION.NONE` |
* | `mouseButtons.middle` ² | `CameraControls.ACTION.ROTATE` \| `CameraControls.ACTION.TRUCK` \| `CameraControls.ACTION.OFFSET` \| `CameraControls.ACTION.DOLLY`* \| `CameraControls.ACTION.ZOOM` \| `CameraControls.ACTION.NONE` |
*
* 1. Mouse wheel event for scroll "up/down" on mac "up/down/left/right"
* 2. Mouse click on wheel event "button"
* - \* is the default.
* - The default of `mouseButtons.wheel` is:
* - `DOLLY` for Perspective camera.
* - `ZOOM` for Orthographic camera, and can't set `DOLLY`.
* @category Properties
*/
mouseButtons: MouseButtons;
/**
* User's touch input config.
*
* | fingers to assign | behavior |
* | --------------------- | -------- |
* | `touches.one` | `CameraControls.ACTION.TOUCH_ROTATE`* \| `CameraControls.ACTION.TOUCH_TRUCK` \| `CameraControls.ACTION.TOUCH_OFFSET` \| `CameraControls.ACTION.DOLLY` | `CameraControls.ACTION.ZOOM` | `CameraControls.ACTION.NONE` |
* | `touches.two` | `ACTION.TOUCH_DOLLY_TRUCK` \| `ACTION.TOUCH_DOLLY_OFFSET` \| `ACTION.TOUCH_ZOOM_TRUCK` \| `ACTION.TOUCH_ZOOM_OFFSET` \| `ACTION.TOUCH_DOLLY` \| `ACTION.TOUCH_ZOOM` \| `CameraControls.ACTION.TOUCH_ROTATE` \| `CameraControls.ACTION.TOUCH_TRUCK` \| `CameraControls.ACTION.TOUCH_OFFSET` \| `CameraControls.ACTION.NONE` |
* | `touches.three` | `ACTION.TOUCH_DOLLY_TRUCK` \| `ACTION.TOUCH_DOLLY_OFFSET` \| `ACTION.TOUCH_ZOOM_TRUCK` \| `ACTION.TOUCH_ZOOM_OFFSET` \| `CameraControls.ACTION.TOUCH_ROTATE` \| `CameraControls.ACTION.TOUCH_TRUCK` \| `CameraControls.ACTION.TOUCH_OFFSET` \| `CameraControls.ACTION.NONE` |
*
* - \* is the default.
* - The default of `touches.two` and `touches.three` is:
* - `TOUCH_DOLLY_TRUCK` for Perspective camera.
* - `TOUCH_ZOOM_TRUCK` for Orthographic camera, and can't set `TOUCH_DOLLY_TRUCK` and `TOUCH_DOLLY`.
* @category Properties
*/
touches: Touches;
/**
* Force cancel user dragging.
* @category Methods
*/
// cancel will be overwritten in the constructor.
cancel: () => void = () => {};
protected _enabled = true;
protected _camera: _THREE.PerspectiveCamera | _THREE.OrthographicCamera;
protected _yAxisUpSpace: _THREE.Quaternion;
protected _yAxisUpSpaceInverse: _THREE.Quaternion;
protected _state: ACTION = ACTION.NONE;
protected _domElement: HTMLElement;
protected _viewport: _THREE.Vector4 | null = null;
// the location of focus, where the object orbits around
protected _target: _THREE.Vector3;
protected _targetEnd: _THREE.Vector3;
protected _focalOffset: _THREE.Vector3;
protected _focalOffsetEnd: _THREE.Vector3;
// rotation and dolly distance
protected _spherical: _THREE.Spherical;
protected _sphericalEnd: _THREE.Spherical;
protected _zoom: number;
protected _zoomEnd: number;
// reset
protected _target0: _THREE.Vector3;
protected _position0: _THREE.Vector3;
protected _zoom0: number;
protected _focalOffset0: _THREE.Vector3;
protected _dollyControlAmount = 0;
protected _dollyControlCoord: _THREE.Vector2;
// collisionTest uses nearPlane. ( PerspectiveCamera only )
protected _nearPlaneCorners: [ _THREE.Vector3, _THREE.Vector3, _THREE.Vector3, _THREE.Vector3 ];
protected _hasRested = true;
protected _boundary: _THREE.Box3;
protected _boundaryEnclosesCamera = false;
protected _needsUpdate = true;
protected _updatedLastTime = false;
protected _elementRect = new DOMRect();
protected _activePointers: PointerInput[] = [];
/**
* Creates a `CameraControls` instance.
*
* Note:
* You **must install** three.js before using camera-controls. see [#install](#install)
* Not doing so will lead to runtime errors (`undefined` references to THREE).
*
* e.g.
* ```
* CameraControls.install( { THREE } );
* const cameraControls = new CameraControls( camera, domElement );
* ```
*
* @param camera A `THREE.PerspectiveCamera` or `THREE.OrthographicCamera` to be controlled.
* @param domElement A `HTMLElement` for the draggable area, usually `renderer.domElement`.
* @category Constructor
*/
constructor(
camera: _THREE.PerspectiveCamera | _THREE.OrthographicCamera,
domElement: HTMLElement,
) {
super();
// Check if the user has installed THREE
if ( typeof THREE === 'undefined' ) {
console.error( 'camera-controls: `THREE` is undefined. You must first run `CameraControls.install( { THREE: THREE } )`. Check the docs for further information.' );
}
this._camera = camera;
this._yAxisUpSpace = new THREE.Quaternion().setFromUnitVectors( this._camera.up, _AXIS_Y );
this._yAxisUpSpaceInverse = quatInvertCompat( this._yAxisUpSpace.clone() );
this._state = ACTION.NONE;
this._domElement = domElement;
this._domElement.style.touchAction = 'none';
this._domElement.style.userSelect = 'none';
this._domElement.style.webkitUserSelect = 'none';
// the location
this._target = new THREE.Vector3();
this._targetEnd = this._target.clone();
this._focalOffset = new THREE.Vector3();
this._focalOffsetEnd = this._focalOffset.clone();
// rotation
this._spherical = new THREE.Spherical().setFromVector3( _v3A.copy( this._camera.position ).applyQuaternion( this._yAxisUpSpace ) );
this._sphericalEnd = this._spherical.clone();
this._zoom = this._camera.zoom;
this._zoomEnd = this._zoom;
// collisionTest uses nearPlane.s
this._nearPlaneCorners = [
new THREE.Vector3(),
new THREE.Vector3(),
new THREE.Vector3(),
new THREE.Vector3(),
];
this._updateNearPlaneCorners();
// Target cannot move outside of this box
this._boundary = new THREE.Box3(
new THREE.Vector3( - Infinity, - Infinity, - Infinity ),
new THREE.Vector3( Infinity, Infinity, Infinity ),
);
// reset
this._target0 = this._target.clone();
this._position0 = this._camera.position.clone();
this._zoom0 = this._zoom;
this._focalOffset0 = this._focalOffset.clone();
this._dollyControlAmount = 0;
this._dollyControlCoord = new THREE.Vector2();
// configs
this.mouseButtons = {
left: ACTION.ROTATE,
middle: ACTION.DOLLY,
right: ACTION.TRUCK,
wheel:
isPerspectiveCamera( this._camera ) ? ACTION.DOLLY :
isOrthographicCamera( this._camera ) ? ACTION.ZOOM :
ACTION.NONE,
shiftLeft: ACTION.NONE,
// We can also add altLeft and etc if someone wants...
};
this.touches = {
one: ACTION.TOUCH_ROTATE,
two:
isPerspectiveCamera( this._camera ) ? ACTION.TOUCH_DOLLY_TRUCK :
isOrthographicCamera( this._camera ) ? ACTION.TOUCH_ZOOM_TRUCK :
ACTION.NONE,
three: ACTION.TOUCH_TRUCK,
};
if ( this._domElement ) {
const dragStartPosition = new THREE.Vector2() as _THREE.Vector2;
const lastDragPosition = new THREE.Vector2() as _THREE.Vector2;
const dollyStart = new THREE.Vector2() as _THREE.Vector2;
const onPointerDown = ( event: PointerEvent ) => {
if ( ! this._enabled ) return;
// Don't call `event.preventDefault()` on the pointerdown event
// to keep receiving pointermove evens outside dragging iframe
// https://taye.me/blog/tips/2015/11/16/mouse-drag-outside-iframe/
const pointer = {
pointerId: event.pointerId,
clientX: event.clientX,
clientY: event.clientY,
};
this._activePointers.push( pointer );
switch ( event.button ) {
case THREE.MOUSE.LEFT:
this._state = event.shiftKey ? this.mouseButtons.shiftLeft : this.mouseButtons.left;
break;
case THREE.MOUSE.MIDDLE:
this._state = this.mouseButtons.middle;
break;
case THREE.MOUSE.RIGHT:
this._state = this.mouseButtons.right;
break;
}
if ( event.pointerType === 'touch' ) {
switch ( this._activePointers.length ) {
case 1:
this._state = this.touches.one;
break;
case 2:
this._state = this.touches.two;
break;
case 3:
this._state = this.touches.three;
break;
}
}
// eslint-disable-next-line no-undef
this._domElement.ownerDocument.removeEventListener( 'pointermove', onPointerMove, { passive: false } as AddEventListenerOptions );
this._domElement.ownerDocument.removeEventListener( 'pointerup', onPointerUp );
this._domElement.ownerDocument.addEventListener( 'pointermove', onPointerMove, { passive: false } );
this._domElement.ownerDocument.addEventListener( 'pointerup', onPointerUp );
startDragging();
};
const onMouseDown = ( event: MouseEvent ) => {
if ( ! this._enabled ) return;
const pointer = {
pointerId: 0,
clientX: event.clientX,
clientY: event.clientY,
};
this._activePointers.push( pointer );
switch ( event.button ) {
case THREE.MOUSE.LEFT:
this._state = event.shiftKey ? this.mouseButtons.shiftLeft : this.mouseButtons.left;
break;
case THREE.MOUSE.MIDDLE:
this._state = this.mouseButtons.middle;
break;
case THREE.MOUSE.RIGHT:
this._state = this.mouseButtons.right;
break;
}
// see https://github.com/microsoft/TypeScript/issues/32912#issuecomment-522142969
// eslint-disable-next-line no-undef
this._domElement.ownerDocument.removeEventListener( 'mousemove', onMouseMove );
this._domElement.ownerDocument.removeEventListener( 'mouseup', onMouseUp );
this._domElement.ownerDocument.addEventListener( 'mousemove', onMouseMove );
this._domElement.ownerDocument.addEventListener( 'mouseup', onMouseUp );
startDragging();
};
const onTouchStart = ( event:TouchEvent ): void => {
if ( ! this._enabled ) return;
event.preventDefault();
Array.prototype.forEach.call( event.changedTouches, ( touch ) => {
const pointer = {
pointerId: touch.identifier,
clientX: touch.clientX,
clientY: touch.clientY,
};
this._activePointers.push( pointer );
} );
switch ( this._activePointers.length ) {
case 1:
this._state = this.touches.one;
break;
case 2:
this._state = this.touches.two;
break;
case 3:
this._state = this.touches.three;
break;
}
// eslint-disable-next-line no-undef
this._domElement.ownerDocument.removeEventListener( 'touchmove', onTouchMove, { passive: false } as AddEventListenerOptions );
this._domElement.ownerDocument.removeEventListener( 'touchend', onTouchEnd );
this._domElement.ownerDocument.addEventListener( 'touchmove', onTouchMove, { passive: false } );
this._domElement.ownerDocument.addEventListener( 'touchend', onTouchEnd );
startDragging();
};
const onPointerMove = ( event: PointerEvent ) => {
if ( event.cancelable ) event.preventDefault();
const pointerId = event.pointerId;
const pointer = this._findPointerById( pointerId );
if ( ! pointer ) return;
pointer.clientX = event.clientX;
pointer.clientY = event.clientY;
dragging();
};
const onMouseMove = ( event: MouseEvent ) => {
const pointer = this._findPointerById( 0 );
if ( ! pointer ) return;
pointer.clientX = event.clientX;
pointer.clientY = event.clientY;
dragging();
};
const onTouchMove = ( event: TouchEvent ) => {
if ( event.cancelable ) event.preventDefault();
Array.prototype.forEach.call( event.changedTouches, ( touch: Touch ) => {
const pointerId = touch.identifier;
const pointer = this._findPointerById( pointerId );
if ( ! pointer ) return;
pointer.clientX = touch.clientX;
pointer.clientY = touch.clientY;
} );
dragging();
};
const onPointerUp = ( event: PointerEvent ) => {
const pointerId = event.pointerId;
const pointer = this._findPointerById( pointerId );
pointer && this._activePointers.splice( this._activePointers.indexOf( pointer ), 1 );
if ( event.pointerType === 'touch' ) {
switch ( this._activePointers.length ) {
case 0:
this._state = ACTION.NONE;
break;
case 1:
this._state = this.touches.one;
break;
case 2:
this._state = this.touches.two;
break;
case 3:
this._state = this.touches.three;
break;
}
} else {
this._state = ACTION.NONE;
}
endDragging();
};
const onMouseUp = () => {
const pointer = this._findPointerById( 0 );
pointer && this._activePointers.splice( this._activePointers.indexOf( pointer ), 1 );
this._state = ACTION.NONE;
endDragging();
};
const onTouchEnd = ( event: TouchEvent ) => {
Array.prototype.forEach.call( event.changedTouches, ( touch: Touch ) => {
const pointerId = touch.identifier;
const pointer = this._findPointerById( pointerId );
pointer && this._activePointers.splice( this._activePointers.indexOf( pointer ), 1 );
} );
switch ( this._activePointers.length ) {
case 0:
this._state = ACTION.NONE;
break;
case 1:
this._state = this.touches.one;
break;
case 2:
this._state = this.touches.two;
break;
case 3:
this._state = this.touches.three;
break;
}
endDragging();
};
let lastScrollTimeStamp = - 1;
const onMouseWheel = ( event: WheelEvent ): void => {
if ( ! this._enabled || this.mouseButtons.wheel === ACTION.NONE ) return;
event.preventDefault();
if (
this.dollyToCursor ||
this.mouseButtons.wheel === ACTION.ROTATE ||
this.mouseButtons.wheel === ACTION.TRUCK
) {
const now = performance.now();
// only need to fire this at scroll start.
if ( lastScrollTimeStamp - now < 1000 ) this._getClientRect( this._elementRect );
lastScrollTimeStamp = now;
}
// Ref: https://github.com/cedricpinson/osgjs/blob/00e5a7e9d9206c06fdde0436e1d62ab7cb5ce853/sources/osgViewer/input/source/InputSourceMouse.js#L89-L103
const deltaYFactor = isMac ? - 1 : - 3;
const delta = ( event.deltaMode === 1 ) ? event.deltaY / deltaYFactor : event.deltaY / ( deltaYFactor * 10 );
const x = this.dollyToCursor ? ( event.clientX - this._elementRect.x ) / this._elementRect.width * 2 - 1 : 0;
const y = this.dollyToCursor ? ( event.clientY - this._elementRect.y ) / this._elementRect.height * - 2 + 1 : 0;
switch ( this.mouseButtons.wheel ) {
case ACTION.ROTATE: {
this._rotateInternal( event.deltaX, event.deltaY );
break;
}
case ACTION.TRUCK: {
this._truckInternal( event.deltaX, event.deltaY, false );
break;
}
case ACTION.OFFSET: {
this._truckInternal( event.deltaX, event.deltaY, true );
break;
}
case ACTION.DOLLY: {
this._dollyInternal( - delta, x, y );
break;
}
case ACTION.ZOOM: {
this._zoomInternal( - delta, x, y );
break;
}
}
this.dispatchEvent( { type: 'control' } );
};
const onContextMenu = ( event: Event ): void => {
if ( ! this._enabled ) return;
event.preventDefault();
};
const startDragging = (): void => {
if ( ! this._enabled ) return;
extractClientCoordFromEvent( this._activePointers, _v2 );
this._getClientRect( this._elementRect );
dragStartPosition.copy( _v2 );
lastDragPosition.copy( _v2 );
const isMultiTouch = this._activePointers.length >= 2;
if ( isMultiTouch ) {
// 2 finger pinch
const dx = _v2.x - this._activePointers[ 1 ].clientX;
const dy = _v2.y - this._activePointers[ 1 ].clientY;
const distance = Math.sqrt( dx * dx + dy * dy );
dollyStart.set( 0, distance );
// center coords of 2 finger truck
const x = ( this._activePointers[ 0 ].clientX + this._activePointers[ 1 ].clientX ) * 0.5;
const y = ( this._activePointers[ 0 ].clientY + this._activePointers[ 1 ].clientY ) * 0.5;
lastDragPosition.set( x, y );
}
this.dispatchEvent( { type: 'controlstart' } );
};
const dragging = (): void => {
if ( ! this._enabled ) return;
extractClientCoordFromEvent( this._activePointers, _v2 );
const deltaX = lastDragPosition.x - _v2.x;
const deltaY = lastDragPosition.y - _v2.y;
lastDragPosition.copy( _v2 );
switch ( this._state ) {
case ACTION.ROTATE:
case ACTION.TOUCH_ROTATE: {
this._rotateInternal( deltaX, deltaY );
break;
}
case ACTION.DOLLY:
case ACTION.ZOOM: {
const dollyX = this.dollyToCursor ? ( dragStartPosition.x - this._elementRect.x ) / this._elementRect.width * 2 - 1 : 0;
const dollyY = this.dollyToCursor ? ( dragStartPosition.y - this._elementRect.y ) / this._elementRect.height * - 2 + 1 : 0;
this._state === ACTION.DOLLY ?
this._dollyInternal( deltaY * TOUCH_DOLLY_FACTOR, dollyX, dollyY ) :
this._zoomInternal( deltaY * TOUCH_DOLLY_FACTOR, dollyX, dollyY );
break;
}
case ACTION.TOUCH_DOLLY:
case ACTION.TOUCH_ZOOM:
case ACTION.TOUCH_DOLLY_TRUCK:
case ACTION.TOUCH_ZOOM_TRUCK:
case ACTION.TOUCH_DOLLY_OFFSET:
case ACTION.TOUCH_ZOOM_OFFSET: {
const dx = _v2.x - this._activePointers[ 1 ].clientX;
const dy = _v2.y - this._activePointers[ 1 ].clientY;
const distance = Math.sqrt( dx * dx + dy * dy );
const dollyDelta = dollyStart.y - distance;
dollyStart.set( 0, distance );
const dollyX = this.dollyToCursor ? ( lastDragPosition.x - this._elementRect.x ) / this._elementRect.width * 2 - 1 : 0;
const dollyY = this.dollyToCursor ? ( lastDragPosition.y - this._elementRect.y ) / this._elementRect.height * - 2 + 1 : 0;
this._state === ACTION.TOUCH_DOLLY ||
this._state === ACTION.TOUCH_DOLLY_TRUCK ||
this._state === ACTION.TOUCH_DOLLY_OFFSET ?
this._dollyInternal( dollyDelta * TOUCH_DOLLY_FACTOR, dollyX, dollyY ) :
this._zoomInternal( dollyDelta * TOUCH_DOLLY_FACTOR, dollyX, dollyY );
if (
this._state === ACTION.TOUCH_DOLLY_TRUCK ||
this._state === ACTION.TOUCH_ZOOM_TRUCK
) {
this._truckInternal( deltaX, deltaY, false );
} else if (
this._state === ACTION.TOUCH_DOLLY_OFFSET ||
this._state === ACTION.TOUCH_ZOOM_OFFSET
) {
this._truckInternal( deltaX, deltaY, true );
}
break;
}
case ACTION.TRUCK:
case ACTION.TOUCH_TRUCK: {
this._truckInternal( deltaX, deltaY, false );
break;
}
case ACTION.OFFSET:
case ACTION.TOUCH_OFFSET: {
this._truckInternal( deltaX, deltaY, true );
break;
}
}
this.dispatchEvent( { type: 'control' } );
};
const endDragging = (): void => {
extractClientCoordFromEvent( this._activePointers, _v2 );
lastDragPosition.copy( _v2 );