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three.cad/extlib/trackball.js

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JavaScript
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import {
EventDispatcher,
MOUSE,
Quaternion,
Vector2,
Vector3
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} from 'three/src/Three';
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var TrackballControls = function ( object, domElement ) {
if ( domElement === undefined ) console.warn( 'THREE.TrackballControls: The second parameter "domElement" is now mandatory.' );
if ( domElement === document ) console.error( 'THREE.TrackballControls: "document" should not be used as the target "domElement". Please use "renderer.domElement" instead.' );
var scope = this;
var STATE = { NONE: - 1, ROTATE: 0, ZOOM: 1, PAN: 2, TOUCH_ROTATE: 3, TOUCH_ZOOM_PAN: 4 };
this.object = object;
this.domElement = domElement;
// API
this.enabled = true;
this.screen = { left: 0, top: 0, width: 0, height: 0 };
this.rotateSpeed = 3.0;
this.zoomSpeed = 1.2;
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this.panSpeed = 2;
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this.noRotate = false;
this.noZoom = false;
this.noPan = false;
this.staticMoving = true;
this.dynamicDampingFactor = 0.2;
this.minDistance = 0;
this.maxDistance = Infinity;
this.keys = [ 65 /*A*/, 83 /*S*/, 68 /*D*/ ];
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this.mouseButtons = { LEFT: null, MIDDLE: MOUSE.PAN, RIGHT: MOUSE.ROTATE };
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// internals
this.target = new Vector3();
var EPS = 0.000001;
var lastPosition = new Vector3();
var lastZoom = 1;
var _state = STATE.NONE,
_keyState = STATE.NONE,
_eye = new Vector3(),
_movePrev = new Vector2(),
_moveCurr = new Vector2(),
_lastAxis = new Vector3(),
_lastAngle = 0,
_zoomStart = new Vector2(),
_zoomEnd = new Vector2(),
_touchZoomDistanceStart = 0,
_touchZoomDistanceEnd = 0,
_panStart = new Vector2(),
_panEnd = new Vector2();
// for reset
this.target0 = this.target.clone();
this.position0 = this.object.position.clone();
this.up0 = this.object.up.clone();
this.zoom0 = this.object.zoom;
// events
var changeEvent = { type: 'change' };
var startEvent = { type: 'start' };
var endEvent = { type: 'end' };
// methods
this.handleResize = function () {
var box = scope.domElement.getBoundingClientRect();
// adjustments come from similar code in the jquery offset() function
var d = scope.domElement.ownerDocument.documentElement;
scope.screen.left = box.left + window.pageXOffset - d.clientLeft;
scope.screen.top = box.top + window.pageYOffset - d.clientTop;
scope.screen.width = box.width;
scope.screen.height = box.height;
};
var getMouseOnScreen = ( function () {
var vector = new Vector2();
return function getMouseOnScreen( pageX, pageY ) {
vector.set(
( pageX - scope.screen.left ) / scope.screen.width,
( pageY - scope.screen.top ) / scope.screen.height
);
return vector;
};
}() );
var getMouseOnCircle = ( function () {
var vector = new Vector2();
return function getMouseOnCircle( pageX, pageY ) {
vector.set(
( ( pageX - scope.screen.width * 0.5 - scope.screen.left ) / ( scope.screen.width * 0.5 ) ),
( ( scope.screen.height + 2 * ( scope.screen.top - pageY ) ) / scope.screen.width ) // screen.width intentional
);
return vector;
};
}() );
this.rotateCamera = ( function () {
var axis = new Vector3(),
quaternion = new Quaternion(),
eyeDirection = new Vector3(),
objectUpDirection = new Vector3(),
objectSidewaysDirection = new Vector3(),
moveDirection = new Vector3(),
angle;
return function rotateCamera() {
moveDirection.set( _moveCurr.x - _movePrev.x, _moveCurr.y - _movePrev.y, 0 );
angle = moveDirection.length();
if ( angle ) {
_eye.copy( scope.object.position ).sub( scope.target );
eyeDirection.copy( _eye ).normalize();
objectUpDirection.copy( scope.object.up ).normalize();
objectSidewaysDirection.crossVectors( objectUpDirection, eyeDirection ).normalize();
objectUpDirection.setLength( _moveCurr.y - _movePrev.y );
objectSidewaysDirection.setLength( _moveCurr.x - _movePrev.x );
moveDirection.copy( objectUpDirection.add( objectSidewaysDirection ) );
axis.crossVectors( moveDirection, _eye ).normalize();
angle *= scope.rotateSpeed;
quaternion.setFromAxisAngle( axis, angle );
_eye.applyQuaternion( quaternion );
scope.object.up.applyQuaternion( quaternion );
_lastAxis.copy( axis );
_lastAngle = angle;
} else if ( ! scope.staticMoving && _lastAngle ) {
_lastAngle *= Math.sqrt( 1.0 - scope.dynamicDampingFactor );
_eye.copy( scope.object.position ).sub( scope.target );
quaternion.setFromAxisAngle( _lastAxis, _lastAngle );
_eye.applyQuaternion( quaternion );
scope.object.up.applyQuaternion( quaternion );
}
_movePrev.copy( _moveCurr );
};
}() );
this.zoomCamera = function () {
var factor;
if ( _state === STATE.TOUCH_ZOOM_PAN ) {
factor = _touchZoomDistanceStart / _touchZoomDistanceEnd;
_touchZoomDistanceStart = _touchZoomDistanceEnd;
if ( scope.object.isPerspectiveCamera ) {
_eye.multiplyScalar( factor );
} else if ( scope.object.isOrthographicCamera ) {
scope.object.zoom *= factor;
scope.object.updateProjectionMatrix();
} else {
console.warn( 'THREE.TrackballControls: Unsupported camera type' );
}
} else {
factor = 1.0 + ( _zoomEnd.y - _zoomStart.y ) * scope.zoomSpeed;
if ( factor !== 1.0 && factor > 0.0 ) {
if ( scope.object.isPerspectiveCamera ) {
_eye.multiplyScalar( factor );
} else if ( scope.object.isOrthographicCamera ) {
scope.object.zoom /= factor;
scope.object.updateProjectionMatrix();
} else {
console.warn( 'THREE.TrackballControls: Unsupported camera type' );
}
}
if ( scope.staticMoving ) {
_zoomStart.copy( _zoomEnd );
} else {
_zoomStart.y += ( _zoomEnd.y - _zoomStart.y ) * this.dynamicDampingFactor;
}
}
};
this.panCamera = ( function () {
var mouseChange = new Vector2(),
objectUp = new Vector3(),
pan = new Vector3();
return function panCamera() {
mouseChange.copy( _panEnd ).sub( _panStart );
if ( mouseChange.lengthSq() ) {
if ( scope.object.isOrthographicCamera ) {
var scale_x = ( scope.object.right - scope.object.left ) / scope.object.zoom / scope.domElement.clientWidth;
var scale_y = ( scope.object.top - scope.object.bottom ) / scope.object.zoom / scope.domElement.clientWidth;
mouseChange.x *= scale_x;
mouseChange.y *= scale_y;
}
mouseChange.multiplyScalar( _eye.length() * scope.panSpeed );
pan.copy( _eye ).cross( scope.object.up ).setLength( mouseChange.x );
pan.add( objectUp.copy( scope.object.up ).setLength( mouseChange.y ) );
scope.object.position.add( pan );
scope.target.add( pan );
if ( scope.staticMoving ) {
_panStart.copy( _panEnd );
} else {
_panStart.add( mouseChange.subVectors( _panEnd, _panStart ).multiplyScalar( scope.dynamicDampingFactor ) );
}
}
};
}() );
this.checkDistances = function () {
if ( ! scope.noZoom || ! scope.noPan ) {
if ( _eye.lengthSq() > scope.maxDistance * scope.maxDistance ) {
scope.object.position.addVectors( scope.target, _eye.setLength( scope.maxDistance ) );
_zoomStart.copy( _zoomEnd );
}
if ( _eye.lengthSq() < scope.minDistance * scope.minDistance ) {
scope.object.position.addVectors( scope.target, _eye.setLength( scope.minDistance ) );
_zoomStart.copy( _zoomEnd );
}
}
};
this.update = function () {
_eye.subVectors( scope.object.position, scope.target );
if ( ! scope.noRotate ) {
scope.rotateCamera();
}
if ( ! scope.noZoom ) {
scope.zoomCamera();
}
if ( ! scope.noPan ) {
scope.panCamera();
}
scope.object.position.addVectors( scope.target, _eye );
if ( scope.object.isPerspectiveCamera ) {
scope.checkDistances();
scope.object.lookAt( scope.target );
if ( lastPosition.distanceToSquared( scope.object.position ) > EPS ) {
scope.dispatchEvent( changeEvent );
lastPosition.copy( scope.object.position );
}
} else if ( scope.object.isOrthographicCamera ) {
scope.object.lookAt( scope.target );
if ( lastPosition.distanceToSquared( scope.object.position ) > EPS || lastZoom !== scope.object.zoom ) {
scope.dispatchEvent( changeEvent );
lastPosition.copy( scope.object.position );
lastZoom = scope.object.zoom;
}
} else {
console.warn( 'THREE.TrackballControls: Unsupported camera type' );
}
};
this.reset = function () {
_state = STATE.NONE;
_keyState = STATE.NONE;
scope.target.copy( scope.target0 );
scope.object.position.copy( scope.position0 );
scope.object.up.copy( scope.up0 );
scope.object.zoom = scope.zoom0;
scope.object.updateProjectionMatrix();
_eye.subVectors( scope.object.position, scope.target );
scope.object.lookAt( scope.target );
scope.dispatchEvent( changeEvent );
lastPosition.copy( scope.object.position );
lastZoom = scope.object.zoom;
};
// listeners
function onPointerDown( event ) {
if ( scope.enabled === false ) return;
switch ( event.pointerType ) {
case 'mouse':
case 'pen':
onMouseDown( event );
break;
// TODO touch
}
}
function onPointerMove( event ) {
if ( scope.enabled === false ) return;
switch ( event.pointerType ) {
case 'mouse':
case 'pen':
onMouseMove( event );
break;
// TODO touch
}
}
function onPointerUp( event ) {
if ( scope.enabled === false ) return;
switch ( event.pointerType ) {
case 'mouse':
case 'pen':
onMouseUp( event );
break;
// TODO touch
}
}
function keydown( event ) {
if ( scope.enabled === false ) return;
window.removeEventListener( 'keydown', keydown );
if ( _keyState !== STATE.NONE ) {
return;
} else if ( event.keyCode === scope.keys[ STATE.ROTATE ] && ! scope.noRotate ) {
_keyState = STATE.ROTATE;
} else if ( event.keyCode === scope.keys[ STATE.ZOOM ] && ! scope.noZoom ) {
_keyState = STATE.ZOOM;
} else if ( event.keyCode === scope.keys[ STATE.PAN ] && ! scope.noPan ) {
_keyState = STATE.PAN;
}
}
function keyup() {
if ( scope.enabled === false ) return;
_keyState = STATE.NONE;
window.addEventListener( 'keydown', keydown );
}
function onMouseDown( event ) {
event.preventDefault();
event.stopPropagation();
if ( _state === STATE.NONE ) {
switch ( event.button ) {
case 0:
_state = scope.mouseButtons.LEFT;
break;
case 1:
_state = scope.mouseButtons.MIDDLE;
break;
case 2:
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if (event.ctrlKey) {
_state = scope.mouseButtons.MIDDLE;
} else {
_state = scope.mouseButtons.RIGHT;
}
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break;
default:
_state = STATE.NONE;
}
}
var state = ( _keyState !== STATE.NONE ) ? _keyState : _state;
if ( state === STATE.ROTATE && ! scope.noRotate ) {
_moveCurr.copy( getMouseOnCircle( event.pageX, event.pageY ) );
_movePrev.copy( _moveCurr );
} else if ( state === STATE.ZOOM && ! scope.noZoom ) {
_zoomStart.copy( getMouseOnScreen( event.pageX, event.pageY ) );
_zoomEnd.copy( _zoomStart );
} else if ( state === STATE.PAN && ! scope.noPan ) {
_panStart.copy( getMouseOnScreen( event.pageX, event.pageY ) );
_panEnd.copy( _panStart );
}
scope.domElement.ownerDocument.addEventListener( 'pointermove', onPointerMove );
scope.domElement.ownerDocument.addEventListener( 'pointerup', onPointerUp );
scope.dispatchEvent( startEvent );
}
function onMouseMove( event ) {
if ( scope.enabled === false ) return;
event.preventDefault();
event.stopPropagation();
var state = ( _keyState !== STATE.NONE ) ? _keyState : _state;
if ( state === STATE.ROTATE && ! scope.noRotate ) {
_movePrev.copy( _moveCurr );
_moveCurr.copy( getMouseOnCircle( event.pageX, event.pageY ) );
} else if ( state === STATE.ZOOM && ! scope.noZoom ) {
_zoomEnd.copy( getMouseOnScreen( event.pageX, event.pageY ) );
} else if ( state === STATE.PAN && ! scope.noPan ) {
_panEnd.copy( getMouseOnScreen( event.pageX, event.pageY ) );
}
scope.update()
}
function onMouseUp( event ) {
if ( scope.enabled === false ) return;
event.preventDefault();
event.stopPropagation();
_state = STATE.NONE;
scope.domElement.ownerDocument.removeEventListener( 'pointermove', onPointerMove );
scope.domElement.ownerDocument.removeEventListener( 'pointerup', onPointerUp );
scope.dispatchEvent( endEvent );
}
function mousewheel( event ) {
if ( scope.enabled === false ) return;
if ( scope.noZoom === true ) return;
event.preventDefault();
event.stopPropagation();
switch ( event.deltaMode ) {
case 2:
// Zoom in pages
_zoomStart.y -= event.deltaY * 0.025;
break;
case 1:
// Zoom in lines
_zoomStart.y -= event.deltaY * 0.01;
break;
default:
// undefined, 0, assume pixels
_zoomStart.y -= event.deltaY * 0.00025;
break;
}
scope.update()
scope.dispatchEvent( startEvent );
scope.dispatchEvent( endEvent );
}
function touchstart( event ) {
if ( scope.enabled === false ) return;
event.preventDefault();
switch ( event.touches.length ) {
case 1:
_state = STATE.TOUCH_ROTATE;
_moveCurr.copy( getMouseOnCircle( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) );
_movePrev.copy( _moveCurr );
break;
default: // 2 or more
_state = STATE.TOUCH_ZOOM_PAN;
var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX;
var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY;
_touchZoomDistanceEnd = _touchZoomDistanceStart = Math.sqrt( dx * dx + dy * dy );
var x = ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX ) / 2;
var y = ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY ) / 2;
_panStart.copy( getMouseOnScreen( x, y ) );
_panEnd.copy( _panStart );
break;
}
scope.dispatchEvent( startEvent );
}
function touchmove( event ) {
if ( scope.enabled === false ) return;
event.preventDefault();
event.stopPropagation();
switch ( event.touches.length ) {
case 1:
_movePrev.copy( _moveCurr );
_moveCurr.copy( getMouseOnCircle( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) );
break;
default: // 2 or more
var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX;
var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY;
_touchZoomDistanceEnd = Math.sqrt( dx * dx + dy * dy );
var x = ( event.touches[ 0 ].pageX + event.touches[ 1 ].pageX ) / 2;
var y = ( event.touches[ 0 ].pageY + event.touches[ 1 ].pageY ) / 2;
_panEnd.copy( getMouseOnScreen( x, y ) );
break;
}
}
function touchend( event ) {
if ( scope.enabled === false ) return;
switch ( event.touches.length ) {
case 0:
_state = STATE.NONE;
break;
case 1:
_state = STATE.TOUCH_ROTATE;
_moveCurr.copy( getMouseOnCircle( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY ) );
_movePrev.copy( _moveCurr );
break;
}
scope.dispatchEvent( endEvent );
}
function contextmenu( event ) {
if ( scope.enabled === false ) return;
event.preventDefault();
}
this.dispose = function () {
scope.domElement.removeEventListener( 'contextmenu', contextmenu );
scope.domElement.removeEventListener( 'pointerdown', onPointerDown );
scope.domElement.removeEventListener( 'wheel', mousewheel );
scope.domElement.removeEventListener( 'touchstart', touchstart );
scope.domElement.removeEventListener( 'touchend', touchend );
scope.domElement.removeEventListener( 'touchmove', touchmove );
scope.domElement.ownerDocument.removeEventListener( 'pointermove', onPointerMove );
scope.domElement.ownerDocument.removeEventListener( 'pointerup', onPointerUp );
window.removeEventListener( 'keydown', keydown );
window.removeEventListener( 'keyup', keyup );
};
this.domElement.addEventListener( 'contextmenu', contextmenu );
this.domElement.addEventListener( 'pointerdown', onPointerDown );
this.domElement.addEventListener( 'wheel', mousewheel );
this.domElement.addEventListener( 'touchstart', touchstart );
this.domElement.addEventListener( 'touchend', touchend );
this.domElement.addEventListener( 'touchmove', touchmove );
this.domElement.ownerDocument.addEventListener( 'pointermove', onPointerMove );
this.domElement.ownerDocument.addEventListener( 'pointerup', onPointerUp );
window.addEventListener( 'keydown', keydown );
window.addEventListener( 'keyup', keyup );
this.handleResize();
// force an update at start
this.update();
};
TrackballControls.prototype = Object.create( EventDispatcher.prototype );
TrackballControls.prototype.constructor = TrackballControls;
export { TrackballControls };