Preview: TrackballControls.js
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/var/www/uibuilder.cmshelp.dk/httpdocs/node_modules/three/examples/jsm/controls/TrackballControls.js
import {
Controls,
MathUtils,
MOUSE,
Quaternion,
Vector2,
Vector3
} from 'three';
const _changeEvent = { type: 'change' };
const _startEvent = { type: 'start' };
const _endEvent = { type: 'end' };
const _EPS = 0.000001;
const _STATE = { NONE: - 1, ROTATE: 0, ZOOM: 1, PAN: 2, TOUCH_ROTATE: 3, TOUCH_ZOOM_PAN: 4 };
const _v2 = new Vector2();
const _mouseChange = new Vector2();
const _objectUp = new Vector3();
const _pan = new Vector3();
const _axis = new Vector3();
const _quaternion = new Quaternion();
const _eyeDirection = new Vector3();
const _objectUpDirection = new Vector3();
const _objectSidewaysDirection = new Vector3();
const _moveDirection = new Vector3();
class TrackballControls extends Controls {
constructor( object, domElement = null ) {
super( object, domElement );
// API
this.enabled = true;
this.screen = { left: 0, top: 0, width: 0, height: 0 };
this.rotateSpeed = 1.0;
this.zoomSpeed = 1.2;
this.panSpeed = 0.3;
this.noRotate = false;
this.noZoom = false;
this.noPan = false;
this.staticMoving = false;
this.dynamicDampingFactor = 0.2;
this.minDistance = 0;
this.maxDistance = Infinity;
this.minZoom = 0;
this.maxZoom = Infinity;
this.keys = [ 'KeyA' /*A*/, 'KeyS' /*S*/, 'KeyD' /*D*/ ];
this.mouseButtons = { LEFT: MOUSE.ROTATE, MIDDLE: MOUSE.DOLLY, RIGHT: MOUSE.PAN };
this.state = _STATE.NONE;
this.keyState = _STATE.NONE;
this.target = new Vector3();
// internals
this._lastPosition = new Vector3();
this._lastZoom = 1;
this._touchZoomDistanceStart = 0;
this._touchZoomDistanceEnd = 0;
this._lastAngle = 0;
this._eye = new Vector3();
this._movePrev = new Vector2();
this._moveCurr = new Vector2();
this._lastAxis = new Vector3();
this._zoomStart = new Vector2();
this._zoomEnd = new Vector2();
this._panStart = new Vector2();
this._panEnd = new Vector2();
this._pointers = [];
this._pointerPositions = {};
// event listeners
this._onPointerMove = onPointerMove.bind( this );
this._onPointerDown = onPointerDown.bind( this );
this._onPointerUp = onPointerUp.bind( this );
this._onPointerCancel = onPointerCancel.bind( this );
this._onContextMenu = onContextMenu.bind( this );
this._onMouseWheel = onMouseWheel.bind( this );
this._onKeyDown = onKeyDown.bind( this );
this._onKeyUp = onKeyUp.bind( this );
this._onTouchStart = onTouchStart.bind( this );
this._onTouchMove = onTouchMove.bind( this );
this._onTouchEnd = onTouchEnd.bind( this );
this._onMouseDown = onMouseDown.bind( this );
this._onMouseMove = onMouseMove.bind( this );
this._onMouseUp = onMouseUp.bind( this );
// for reset
this._target0 = this.target.clone();
this._position0 = this.object.position.clone();
this._up0 = this.object.up.clone();
this._zoom0 = this.object.zoom;
if ( domElement !== null ) {
this.connect();
this.handleResize();
}
// force an update at start
this.update();
}
connect() {
window.addEventListener( 'keydown', this._onKeyDown );
window.addEventListener( 'keyup', this._onKeyUp );
this.domElement.addEventListener( 'pointerdown', this._onPointerDown );
this.domElement.addEventListener( 'pointercancel', this._onPointerCancel );
this.domElement.addEventListener( 'wheel', this._onMouseWheel, { passive: false } );
this.domElement.addEventListener( 'contextmenu', this._onContextMenu );
this.domElement.style.touchAction = 'none'; // disable touch scroll
}
disconnect() {
window.removeEventListener( 'keydown', this._onKeyDown );
window.removeEventListener( 'keyup', this._onKeyUp );
this.domElement.removeEventListener( 'pointerdown', this._onPointerDown );
this.domElement.removeEventListener( 'pointermove', this._onPointerMove );
this.domElement.removeEventListener( 'pointerup', this._onPointerUp );
this.domElement.removeEventListener( 'pointercancel', this._onPointerCancel );
this.domElement.removeEventListener( 'wheel', this._onMouseWheel );
this.domElement.removeEventListener( 'contextmenu', this._onContextMenu );
this.domElement.style.touchAction = 'auto'; // disable touch scroll
}
dispose() {
this.disconnect();
}
handleResize() {
const box = this.domElement.getBoundingClientRect();
// adjustments come from similar code in the jquery offset() function
const d = this.domElement.ownerDocument.documentElement;
this.screen.left = box.left + window.pageXOffset - d.clientLeft;
this.screen.top = box.top + window.pageYOffset - d.clientTop;
this.screen.width = box.width;
this.screen.height = box.height;
}
update() {
this._eye.subVectors( this.object.position, this.target );
if ( ! this.noRotate ) {
this._rotateCamera();
}
if ( ! this.noZoom ) {
this._zoomCamera();
}
if ( ! this.noPan ) {
this._panCamera();
}
this.object.position.addVectors( this.target, this._eye );
if ( this.object.isPerspectiveCamera ) {
this._checkDistances();
this.object.lookAt( this.target );
if ( this._lastPosition.distanceToSquared( this.object.position ) > _EPS ) {
this.dispatchEvent( _changeEvent );
this._lastPosition.copy( this.object.position );
}
} else if ( this.object.isOrthographicCamera ) {
this.object.lookAt( this.target );
if ( this._lastPosition.distanceToSquared( this.object.position ) > _EPS || this._lastZoom !== this.object.zoom ) {
this.dispatchEvent( _changeEvent );
this._lastPosition.copy( this.object.position );
this._lastZoom = this.object.zoom;
}
} else {
console.warn( 'THREE.TrackballControls: Unsupported camera type.' );
}
}
reset() {
this.state = _STATE.NONE;
this.keyState = _STATE.NONE;
this.target.copy( this._target0 );
this.object.position.copy( this._position0 );
this.object.up.copy( this._up0 );
this.object.zoom = this._zoom0;
this.object.updateProjectionMatrix();
this._eye.subVectors( this.object.position, this.target );
this.object.lookAt( this.target );
this.dispatchEvent( _changeEvent );
this._lastPosition.copy( this.object.position );
this._lastZoom = this.object.zoom;
}
_panCamera() {
_mouseChange.copy( this._panEnd ).sub( this._panStart );
if ( _mouseChange.lengthSq() ) {
if ( this.object.isOrthographicCamera ) {
const scale_x = ( this.object.right - this.object.left ) / this.object.zoom / this.domElement.clientWidth;
const scale_y = ( this.object.top - this.object.bottom ) / this.object.zoom / this.domElement.clientWidth;
_mouseChange.x *= scale_x;
_mouseChange.y *= scale_y;
}
_mouseChange.multiplyScalar( this._eye.length() * this.panSpeed );
_pan.copy( this._eye ).cross( this.object.up ).setLength( _mouseChange.x );
_pan.add( _objectUp.copy( this.object.up ).setLength( _mouseChange.y ) );
this.object.position.add( _pan );
this.target.add( _pan );
if ( this.staticMoving ) {
this._panStart.copy( this._panEnd );
} else {
this._panStart.add( _mouseChange.subVectors( this._panEnd, this._panStart ).multiplyScalar( this.dynamicDampingFactor ) );
}
}
}
_rotateCamera() {
_moveDirection.set( this._moveCurr.x - this._movePrev.x, this._moveCurr.y - this._movePrev.y, 0 );
let angle = _moveDirection.length();
if ( angle ) {
this._eye.copy( this.object.position ).sub( this.target );
_eyeDirection.copy( this._eye ).normalize();
_objectUpDirection.copy( this.object.up ).normalize();
_objectSidewaysDirection.crossVectors( _objectUpDirection, _eyeDirection ).normalize();
_objectUpDirection.setLength( this._moveCurr.y - this._movePrev.y );
_objectSidewaysDirection.setLength( this._moveCurr.x - this._movePrev.x );
_moveDirection.copy( _objectUpDirection.add( _objectSidewaysDirection ) );
_axis.crossVectors( _moveDirection, this._eye ).normalize();
angle *= this.rotateSpeed;
_quaternion.setFromAxisAngle( _axis, angle );
this._eye.applyQuaternion( _quaternion );
this.object.up.applyQuaternion( _quaternion );
this._lastAxis.copy( _axis );
this._lastAngle = angle;
} else if ( ! this.staticMoving && this._lastAngle ) {
this._lastAngle *= Math.sqrt( 1.0 - this.dynamicDampingFactor );
this._eye.copy( this.object.position ).sub( this.target );
_quaternion.setFromAxisAngle( this._lastAxis, this._lastAngle );
this._eye.applyQuaternion( _quaternion );
this.object.up.applyQuaternion( _quaternion );
}
this._movePrev.copy( this._moveCurr );
}
_zoomCamera() {
let factor;
if ( this.state === _STATE.TOUCH_ZOOM_PAN ) {
factor = this._touchZoomDistanceStart / this._touchZoomDistanceEnd;
this._touchZoomDistanceStart = this._touchZoomDistanceEnd;
if ( this.object.isPerspectiveCamera ) {
this._eye.multiplyScalar( factor );
} else if ( this.object.isOrthographicCamera ) {
this.object.zoom = MathUtils.clamp( this.object.zoom / factor, this.minZoom, this.maxZoom );
if ( this._lastZoom !== this.object.zoom ) {
this.object.updateProjectionMatrix();
}
} else {
console.warn( 'THREE.TrackballControls: Unsupported camera type' );
}
} else {
factor = 1.0 + ( this._zoomEnd.y - this._zoomStart.y ) * this.zoomSpeed;
if ( factor !== 1.0 && factor > 0.0 ) {
if ( this.object.isPerspectiveCamera ) {
this._eye.multiplyScalar( factor );
} else if ( this.object.isOrthographicCamera ) {
this.object.zoom = MathUtils.clamp( this.object.zoom / factor, this.minZoom, this.maxZoom );
if ( this._lastZoom !== this.object.zoom ) {
this.object.updateProjectionMatrix();
}
} else {
console.warn( 'THREE.TrackballControls: Unsupported camera type' );
}
}
if ( this.staticMoving ) {
this._zoomStart.copy( this._zoomEnd );
} else {
this._zoomStart.y += ( this._zoomEnd.y - this._zoomStart.y ) * this.dynamicDampingFactor;
}
}
}
_getMouseOnScreen( pageX, pageY ) {
_v2.set(
( pageX - this.screen.left ) / this.screen.width,
( pageY - this.screen.top ) / this.screen.height
);
return _v2;
}
_getMouseOnCircle( pageX, pageY ) {
_v2.set(
( ( pageX - this.screen.width * 0.5 - this.screen.left ) / ( this.screen.width * 0.5 ) ),
( ( this.screen.height + 2 * ( this.screen.top - pageY ) ) / this.screen.width ) // screen.width intentional
);
return _v2;
}
_addPointer( event ) {
this._pointers.push( event );
}
_removePointer( event ) {
delete this._pointerPositions[ event.pointerId ];
for ( let i = 0; i < this._pointers.length; i ++ ) {
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 };
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