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OrbitControls.js
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import {
EventDispatcher,
MOUSE,
Quaternion,
Spherical,
TOUCH,
Vector2,
Vector3,
Plane,
Ray,
MathUtils
} from 'three';
// OrbitControls performs orbiting, dollying (zooming), and panning.
// Unlike TrackballControls, it maintains the "up" direction object.up (+Y by default).
//
// Orbit - left mouse / touch: one-finger move
// Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish
// Pan - right mouse, or left mouse + ctrl/meta/shiftKey, or arrow keys / touch: two-finger move
const _changeEvent = { type: 'change' };
const _startEvent = { type: 'start' };
const _endEvent = { type: 'end' };
const _ray = new Ray();
const _plane = new Plane();
const TILT_LIMIT = Math.cos( 70 * MathUtils.DEG2RAD );
class OrbitControls extends EventDispatcher {
constructor( object, domElement ) {
super();
this.object = object;
this.domElement = domElement;
this.domElement.style.touchAction = 'none'; // disable touch scroll
// Set to false to disable this control
this.enabled = true;
// "target" sets the location of focus, where the object orbits around
this.target = new Vector3();
// How far you can dolly in and out ( PerspectiveCamera only )
this.minDistance = 0;
this.maxDistance = Infinity;
// How far you can zoom in and out ( OrthographicCamera only )
this.minZoom = 0;
this.maxZoom = Infinity;
// How far you can orbit vertically, upper and lower limits.
// Range is 0 to Math.PI radians.
this.minPolarAngle = 0; // radians
this.maxPolarAngle = Math.PI; // radians
// How far you can orbit horizontally, upper and lower limits.
// If set, the interval [ min, max ] must be a sub-interval of [ - 2 PI, 2 PI ], with ( max - min < 2 PI )
this.minAzimuthAngle = - Infinity; // radians
this.maxAzimuthAngle = Infinity; // radians
// Set to true to enable damping (inertia)
// If damping is enabled, you must call controls.update() in your animation loop
this.enableDamping = false;
this.dampingFactor = 0.05;
// This option actually enables dollying in and out; left as "zoom" for backwards compatibility.
// Set to false to disable zooming
this.enableZoom = true;
this.zoomSpeed = 1.0;
// Set to false to disable rotating
this.enableRotate = true;
this.rotateSpeed = 1.0;
// Set to false to disable panning
this.enablePan = true;
this.panSpeed = 1.0;
this.screenSpacePanning = true; // if false, pan orthogonal to world-space direction camera.up
this.keyPanSpeed = 7.0; // pixels moved per arrow key push
this.zoomToCursor = false;
// Set to true to automatically rotate around the target
// If auto-rotate is enabled, you must call controls.update() in your animation loop
this.autoRotate = false;
this.autoRotateSpeed = 2.0; // 30 seconds per orbit when fps is 60
// The four arrow keys
this.keys = { LEFT: 'ArrowLeft', UP: 'ArrowUp', RIGHT: 'ArrowRight', BOTTOM: 'ArrowDown' };
// Mouse buttons
this.mouseButtons = { LEFT: MOUSE.ROTATE, MIDDLE: MOUSE.DOLLY, RIGHT: MOUSE.PAN };
// Touch fingers
this.touches = { ONE: TOUCH.ROTATE, TWO: TOUCH.DOLLY_PAN };
// for reset
this.target0 = this.target.clone();
this.position0 = this.object.position.clone();
this.zoom0 = this.object.zoom;
// the target DOM element for key events
this._domElementKeyEvents = null;
//
// public methods
//
this.getPolarAngle = function () {
return spherical.phi;
};
this.getAzimuthalAngle = function () {
return spherical.theta;
};
this.getDistance = function () {
return this.object.position.distanceTo( this.target );
};
this.listenToKeyEvents = function ( domElement ) {
domElement.addEventListener( 'keydown', onKeyDown );
this._domElementKeyEvents = domElement;
};
this.stopListenToKeyEvents = function () {
this._domElementKeyEvents.removeEventListener( 'keydown', onKeyDown );
this._domElementKeyEvents = null;
};
this.saveState = function () {
scope.target0.copy( scope.target );
scope.position0.copy( scope.object.position );
scope.zoom0 = scope.object.zoom;
};
this.reset = function () {
scope.target.copy( scope.target0 );
scope.object.position.copy( scope.position0 );
scope.object.zoom = scope.zoom0;
scope.object.updateProjectionMatrix();
scope.dispatchEvent( _changeEvent );
scope.update();
state = STATE.NONE;
};
// this method is exposed, but perhaps it would be better if we can make it private...
this.update = function () {
const offset = new Vector3();
// so camera.up is the orbit axis
const quat = new Quaternion().setFromUnitVectors( object.up, new Vector3( 0, 1, 0 ) );
const quatInverse = quat.clone().invert();
const lastPosition = new Vector3();
const lastQuaternion = new Quaternion();
const lastTargetPosition = new Vector3();
const twoPI = 2 * Math.PI;
return function update() {
const position = scope.object.position;
offset.copy( position ).sub( scope.target );
// rotate offset to "y-axis-is-up" space
offset.applyQuaternion( quat );
// angle from z-axis around y-axis
spherical.setFromVector3( offset );
if ( scope.autoRotate && state === STATE.NONE ) {
rotateLeft( getAutoRotationAngle() );
}
if ( scope.enableDamping ) {
spherical.theta += sphericalDelta.theta * scope.dampingFactor;
spherical.phi += sphericalDelta.phi * scope.dampingFactor;
} else {
spherical.theta += sphericalDelta.theta;
spherical.phi += sphericalDelta.phi;
}
// restrict theta to be between desired limits
let min = scope.minAzimuthAngle;
let max = scope.maxAzimuthAngle;
if ( isFinite( min ) && isFinite( max ) ) {
if ( min < - Math.PI ) min += twoPI; else if ( min > Math.PI ) min -= twoPI;
if ( max < - Math.PI ) max += twoPI; else if ( max > Math.PI ) max -= twoPI;
if ( min <= max ) {
spherical.theta = Math.max( min, Math.min( max, spherical.theta ) );
} else {
spherical.theta = ( spherical.theta > ( min + max ) / 2 ) ?
Math.max( min, spherical.theta ) :
Math.min( max, spherical.theta );
}
}
// restrict phi to be between desired limits
spherical.phi = Math.max( scope.minPolarAngle, Math.min( scope.maxPolarAngle, spherical.phi ) );
spherical.makeSafe();
// move target to panned location
if ( scope.enableDamping === true ) {
scope.target.addScaledVector( panOffset, scope.dampingFactor );
} else {
scope.target.add( panOffset );
}
// adjust the camera position based on zoom only if we're not zooming to the cursor or if it's an ortho camera
// we adjust zoom later in these cases
if ( scope.zoomToCursor && performCursorZoom || scope.object.isOrthographicCamera ) {
spherical.radius = clampDistance( spherical.radius );
} else {
spherical.radius = clampDistance( spherical.radius * scale );
}
offset.setFromSpherical( spherical );
// rotate offset back to "camera-up-vector-is-up" space
offset.applyQuaternion( quatInverse );
position.copy( scope.target ).add( offset );
scope.object.lookAt( scope.target );
if ( scope.enableDamping === true ) {
sphericalDelta.theta *= ( 1 - scope.dampingFactor );
sphericalDelta.phi *= ( 1 - scope.dampingFactor );
panOffset.multiplyScalar( 1 - scope.dampingFactor );
} else {
sphericalDelta.set( 0, 0, 0 );
panOffset.set( 0, 0, 0 );
}
// adjust camera position
let zoomChanged = false;
if ( scope.zoomToCursor && performCursorZoom ) {
let newRadius = null;
if ( scope.object.isPerspectiveCamera ) {
// move the camera down the pointer ray
// this method avoids floating point error
const prevRadius = offset.length();
newRadius = clampDistance( prevRadius * scale );
const radiusDelta = prevRadius - newRadius;
scope.object.position.addScaledVector( dollyDirection, radiusDelta );
scope.object.updateMatrixWorld();
} else if ( scope.object.isOrthographicCamera ) {
// adjust the ortho camera position based on zoom changes
const mouseBefore = new Vector3( mouse.x, mouse.y, 0 );
mouseBefore.unproject( scope.object );
scope.object.zoom = Math.max( scope.minZoom, Math.min( scope.maxZoom, scope.object.zoom / scale ) );
scope.object.updateProjectionMatrix();
zoomChanged = true;
const mouseAfter = new Vector3( mouse.x, mouse.y, 0 );
mouseAfter.unproject( scope.object );
scope.object.position.sub( mouseAfter ).add( mouseBefore );
scope.object.updateMatrixWorld();
newRadius = offset.length();
} else {
console.warn( 'WARNING: OrbitControls.js encountered an unknown camera type - zoom to cursor disabled.' );
scope.zoomToCursor = false;
}
// handle the placement of the target
if ( newRadius !== null ) {
if ( this.screenSpacePanning ) {
// position the orbit target in front of the new camera position
scope.target.set( 0, 0, - 1 )
.transformDirection( scope.object.matrix )
.multiplyScalar( newRadius )
.add( scope.object.position );
} else {
// get the ray and translation plane to compute target
_ray.origin.copy( scope.object.position );
_ray.direction.set( 0, 0, - 1 ).transformDirection( scope.object.matrix );
// if the camera is 20 degrees above the horizon then don't adjust the focus target to avoid
// extremely large values
if ( Math.abs( scope.object.up.dot( _ray.direction ) ) < TILT_LIMIT ) {
object.lookAt( scope.target );
} else {
_plane.setFromNormalAndCoplanarPoint( scope.object.up, scope.target );
_ray.intersectPlane( _plane, scope.target );
}
}
}
} else if ( scope.object.isOrthographicCamera ) {
scope.object.zoom = Math.max( scope.minZoom, Math.min( scope.maxZoom, scope.object.zoom / scale ) );
scope.object.updateProjectionMatrix();
zoomChanged = true;
}
scale = 1;
performCursorZoom = false;
// update condition is:
// min(camera displacement, camera rotation in radians)^2 > EPS
// using small-angle approximation cos(x/2) = 1 - x^2 / 8
if ( zoomChanged ||
lastPosition.distanceToSquared( scope.object.position ) > EPS ||
8 * ( 1 - lastQuaternion.dot( scope.object.quaternion ) ) > EPS ||
lastTargetPosition.distanceToSquared( scope.target ) > 0 ) {
scope.dispatchEvent( _changeEvent );
lastPosition.copy( scope.object.position );
lastQuaternion.copy( scope.object.quaternion );
lastTargetPosition.copy( scope.target );
zoomChanged = false;
return true;
}
return false;
};
}();
this.dispose = function () {
scope.domElement.removeEventListener( 'contextmenu', onContextMenu );
scope.domElement.removeEventListener( 'pointerdown', onPointerDown );
scope.domElement.removeEventListener( 'pointercancel', onPointerUp );
scope.domElement.removeEventListener( 'wheel', onMouseWheel );
scope.domElement.removeEventListener( 'pointermove', onPointerMove );
scope.domElement.removeEventListener( 'pointerup', onPointerUp );
if ( scope._domElementKeyEvents !== null ) {
scope._domElementKeyEvents.removeEventListener( 'keydown', onKeyDown );
scope._domElementKeyEvents = null;
}
//scope.dispatchEvent( { type: 'dispose' } ); // should this be added here?
};
//
// internals
//
const scope = this;
const STATE = {
NONE: - 1,
ROTATE: 0,
DOLLY: 1,
PAN: 2,
TOUCH_ROTATE: 3,
TOUCH_PAN: 4,
TOUCH_DOLLY_PAN: 5,
TOUCH_DOLLY_ROTATE: 6
};
let state = STATE.NONE;
const EPS = 0.000001;
// current position in spherical coordinates
const spherical = new Spherical();
const sphericalDelta = new Spherical();
let scale = 1;
const panOffset = new Vector3();
const rotateStart = new Vector2();
const rotateEnd = new Vector2();
const rotateDelta = new Vector2();
const panStart = new Vector2();
const panEnd = new Vector2();
const panDelta = new Vector2();
const dollyStart = new Vector2();
const dollyEnd = new Vector2();
const dollyDelta = new Vector2();
const dollyDirection = new Vector3();
const mouse = new Vector2();
let performCursorZoom = false;
const pointers = [];
const pointerPositions = {};
function getAutoRotationAngle() {
return 2 * Math.PI / 60 / 60 * scope.autoRotateSpeed;
}
function getZoomScale() {
return Math.pow( 0.95, scope.zoomSpeed );
}
function rotateLeft( angle ) {
sphericalDelta.theta -= angle;
}
function rotateUp( angle ) {
sphericalDelta.phi -= angle;
}
const panLeft = function () {
const v = new Vector3();
return function panLeft( distance, objectMatrix ) {
v.setFromMatrixColumn( objectMatrix, 0 ); // get X column of objectMatrix
v.multiplyScalar( - distance );
panOffset.add( v );
};
}();
const panUp = function () {
const v = new Vector3();
return function panUp( distance, objectMatrix ) {
if ( scope.screenSpacePanning === true ) {
v.setFromMatrixColumn( objectMatrix, 1 );
} else {
v.setFromMatrixColumn( objectMatrix, 0 );
v.crossVectors( scope.object.up, v );
}
v.multiplyScalar( distance );
panOffset.add( v );
};
}();
// deltaX and deltaY are in pixels; right and down are positive
const pan = function () {
const offset = new Vector3();
return function pan( deltaX, deltaY ) {
const element = scope.domElement;
if ( scope.object.isPerspectiveCamera ) {
// perspective
const position = scope.object.position;
offset.copy( position ).sub( scope.target );
let targetDistance = offset.length();
// half of the fov is center to top of screen
targetDistance *= Math.tan( ( scope.object.fov / 2 ) * Math.PI / 180.0 );
// we use only clientHeight here so aspect ratio does not distort speed
panLeft( 2 * deltaX * targetDistance / element.clientHeight, scope.object.matrix );
panUp( 2 * deltaY * targetDistance / element.clientHeight, scope.object.matrix );
} else if ( scope.object.isOrthographicCamera ) {
// 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 updateMouseParameters( event ) {
if ( ! scope.zoomToCursor ) {
return;
}
performCursorZoom = true;
const rect = scope.domElement.getBoundingClientRect();
const x = event.clientX - rect.left;
const y = event.clientY - rect.top;
const w = rect.width;
const h = rect.height;
mouse.x = ( x / w ) * 2 - 1;
mouse.y = - ( y / h ) * 2 + 1;
dollyDirection.set( mouse.x, mouse.y, 1 ).unproject( object ).sub( 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 ) {
updateMouseParameters( event );
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() );
} else if ( dollyDelta.y < 0 ) {
dollyIn( getZoomScale() );
}
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 ) {
updateMouseParameters( event );
if ( event.deltaY < 0 ) {
dollyIn( getZoomScale() );
} else if ( event.deltaY > 0 ) {
dollyOut( getZoomScale() );
}
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() {
if ( pointers.length === 1 ) {
rotateStart.set( pointers[ 0 ].pageX, pointers[ 0 ].pageY );
} else {
const x = 0.5 * ( pointers[ 0 ].pageX + pointers[ 1 ].pageX );
const y = 0.5 * ( pointers[ 0 ].pageY + pointers[ 1 ].pageY );
rotateStart.set( x, y );
}
}
function handleTouchStartPan() {
if ( pointers.length === 1 ) {
panStart.set( pointers[ 0 ].pageX, pointers[ 0 ].pageY );
} else {
const x = 0.5 * ( pointers[ 0 ].pageX + pointers[ 1 ].pageX );
const y = 0.5 * ( pointers[ 0 ].pageY + pointers[ 1 ].pageY );
panStart.set( x, y );
}
}
function handleTouchStartDolly() {
const dx = pointers[ 0 ].pageX - pointers[ 1 ].pageX;
const dy = pointers[ 0 ].pageY - pointers[ 1 ].pageY;
const distance = Math.sqrt( dx * dx + dy * dy );
dollyStart.set( 0, distance );
}
function handleTouchStartDollyPan() {
if ( scope.enableZoom ) handleTouchStartDolly();
if ( scope.enablePan ) handleTouchStartPan();
}
function handleTouchStartDollyRotate() {
if ( scope.enableZoom ) handleTouchStartDolly();
if ( scope.enableRotate ) handleTouchStartRotate();
}
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 );
}
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 );
}
//
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 );