panolens
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Javascript panorama viewer
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JavaScript
import * as THREE from 'three';
/**
* @classdesc Orbit Controls
* @constructor
* @external OrbitControls
* @param {THREE.Object} object
* @param {HTMLElement} domElement
*/
function OrbitControls ( object, domElement ) {
this.object = object;
this.domElement = ( domElement !== undefined ) ? domElement : document;
this.frameId = null;
// API
// Set to false to disable this control
this.enabled = true;
/*
* "target" sets the location of focus, where the control orbits around
* and where it pans with respect to.
*/
this.target = new THREE.Vector3();
// center is old, deprecated; use "target" instead
this.center = this.target;
/*
* This option actually enables dollying in and out; left as "zoom" for
* backwards compatibility
*/
this.noZoom = false;
this.zoomSpeed = 1.0;
// Limits to how far you can dolly in and out ( PerspectiveCamera only )
this.minDistance = 0;
this.maxDistance = Infinity;
// Limits to how far you can zoom in and out ( OrthographicCamera only )
this.minZoom = 0;
this.maxZoom = Infinity;
// Set to true to disable this control
this.noRotate = false;
this.rotateSpeed = -0.15;
// Set to true to disable this control
this.noPan = true;
this.keyPanSpeed = 7.0; // pixels moved per arrow key push
// Set to true to automatically rotate around the target
this.autoRotate = false;
this.autoRotateSpeed = 2.0; // 30 seconds per round when fps is 60
/*
* 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
// Momentum
this.momentumDampingFactor = 0.90;
this.momentumScalingFactor = -0.005;
this.momentumKeydownFactor = 20;
// Fov
this.minFov = 30;
this.maxFov = 120;
/*
* How far you can orbit horizontally, upper and lower limits.
* If set, must be a sub-interval of the interval [ - Math.PI, Math.PI ].
*/
this.minAzimuthAngle = - Infinity; // radians
this.maxAzimuthAngle = Infinity; // radians
// Set to true to disable use of the keys
this.noKeys = false;
// The four arrow keys
this.keys = { LEFT: 37, UP: 38, RIGHT: 39, BOTTOM: 40 };
// Mouse buttons
this.mouseButtons = { ORBIT: THREE.MOUSE.LEFT, ZOOM: THREE.MOUSE.MIDDLE, PAN: THREE.MOUSE.RIGHT };
/*
* //////////
* internals
*/
var scope = this;
var EPS = 10e-8;
var MEPS = 10e-5;
var rotateStart = new THREE.Vector2();
var rotateEnd = new THREE.Vector2();
var rotateDelta = new THREE.Vector2();
var panStart = new THREE.Vector2();
var panEnd = new THREE.Vector2();
var panDelta = new THREE.Vector2();
var panOffset = new THREE.Vector3();
var offset = new THREE.Vector3();
var dollyStart = new THREE.Vector2();
var dollyEnd = new THREE.Vector2();
var dollyDelta = new THREE.Vector2();
var theta = 0;
var phi = 0;
var phiDelta = 0;
var thetaDelta = 0;
var scale = 1;
var pan = new THREE.Vector3();
var lastPosition = new THREE.Vector3();
var lastQuaternion = new THREE.Quaternion();
var momentumLeft = 0, momentumUp = 0;
var eventPrevious;
var momentumOn = false;
var keyUp, keyBottom, keyLeft, keyRight;
var STATE = { NONE: -1, ROTATE: 0, DOLLY: 1, PAN: 2, TOUCH_ROTATE: 3, TOUCH_DOLLY: 4, TOUCH_PAN: 5 };
var state = STATE.NONE;
// for reset
this.target0 = this.target.clone();
this.position0 = this.object.position.clone();
this.zoom0 = this.object.zoom;
// so camera.up is the orbit axis
var quat = new THREE.Quaternion().setFromUnitVectors( object.up, new THREE.Vector3( 0, 1, 0 ) );
var quatInverse = quat.clone().inverse();
// events
var changeEvent = { type: 'change' };
var startEvent = { type: 'start' };
var endEvent = { type: 'end' };
this.setLastQuaternion = function ( quaternion ) {
lastQuaternion.copy( quaternion );
scope.object.quaternion.copy( quaternion );
};
this.getLastPosition = function () {
return lastPosition;
};
this.rotateLeft = function ( angle ) {
if ( angle === undefined ) {
angle = getAutoRotationAngle();
}
thetaDelta -= angle;
};
this.rotateUp = function ( angle ) {
if ( angle === undefined ) {
angle = getAutoRotationAngle();
}
phiDelta -= angle;
};
// pass in distance in world space to move left
this.panLeft = function ( distance ) {
var te = this.object.matrix.elements;
// get X column of matrix
panOffset.set( te[ 0 ], te[ 1 ], te[ 2 ] );
panOffset.multiplyScalar( - distance );
pan.add( panOffset );
};
// pass in distance in world space to move up
this.panUp = function ( distance ) {
var te = this.object.matrix.elements;
// get Y column of matrix
panOffset.set( te[ 4 ], te[ 5 ], te[ 6 ] );
panOffset.multiplyScalar( distance );
pan.add( panOffset );
};
/*
* pass in x,y of change desired in pixel space,
* right and down are positive
*/
this.pan = function ( deltaX, deltaY ) {
var element = scope.domElement === document ? scope.domElement.body : scope.domElement;
if ( scope.object instanceof THREE.PerspectiveCamera ) {
// perspective
var position = scope.object.position;
var offset = position.clone().sub( scope.target );
var 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 actually don't use screenWidth, since perspective camera is fixed to screen height
scope.panLeft( 2 * deltaX * targetDistance / element.clientHeight );
scope.panUp( 2 * deltaY * targetDistance / element.clientHeight );
} else if ( scope.object instanceof THREE.OrthographicCamera ) {
// orthographic
scope.panLeft( deltaX * (scope.object.right - scope.object.left) / element.clientWidth );
scope.panUp( deltaY * (scope.object.top - scope.object.bottom) / element.clientHeight );
} else {
// camera neither orthographic or perspective
console.warn( 'WARNING: OrbitControls.js encountered an unknown camera type - pan disabled.' );
}
};
this.momentum = function(){
if ( !momentumOn ) return;
if ( Math.abs( momentumLeft ) < MEPS && Math.abs( momentumUp ) < MEPS ) {
momentumOn = false;
return;
}
momentumUp *= this.momentumDampingFactor;
momentumLeft *= this.momentumDampingFactor;
thetaDelta -= this.momentumScalingFactor * momentumLeft;
phiDelta -= this.momentumScalingFactor * momentumUp;
};
this.dollyIn = function ( dollyScale ) {
if ( dollyScale === undefined ) {
dollyScale = getZoomScale();
}
if ( scope.object instanceof THREE.PerspectiveCamera ) {
scale /= dollyScale;
} else if ( scope.object instanceof THREE.OrthographicCamera ) {
scope.object.zoom = Math.max( this.minZoom, Math.min( this.maxZoom, this.object.zoom * dollyScale ) );
scope.object.updateProjectionMatrix();
scope.dispatchEvent( changeEvent );
} else {
console.warn( 'WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.' );
}
};
this.dollyOut = function ( dollyScale ) {
if ( dollyScale === undefined ) {
dollyScale = getZoomScale();
}
if ( scope.object instanceof THREE.PerspectiveCamera ) {
scale *= dollyScale;
} else if ( scope.object instanceof THREE.OrthographicCamera ) {
scope.object.zoom = Math.max( this.minZoom, Math.min( this.maxZoom, this.object.zoom / dollyScale ) );
scope.object.updateProjectionMatrix();
scope.dispatchEvent( changeEvent );
} else {
console.warn( 'WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.' );
}
};
this.update = function ( ignoreUpdate ) {
var position = this.object.position;
offset.copy( position ).sub( this.target );
// rotate offset to "y-axis-is-up" space
offset.applyQuaternion( quat );
// angle from z-axis around y-axis
theta = Math.atan2( offset.x, offset.z );
// angle from y-axis
phi = Math.atan2( Math.sqrt( offset.x * offset.x + offset.z * offset.z ), offset.y );
if ( this.autoRotate && state === STATE.NONE ) {
this.rotateLeft( getAutoRotationAngle() );
}
this.momentum();
theta += thetaDelta;
phi += phiDelta;
// restrict theta to be between desired limits
theta = Math.max( this.minAzimuthAngle, Math.min( this.maxAzimuthAngle, theta ) );
// restrict phi to be between desired limits
phi = Math.max( this.minPolarAngle, Math.min( this.maxPolarAngle, phi ) );
// restrict phi to be betwee EPS and PI-EPS
phi = Math.max( EPS, Math.min( Math.PI - EPS, phi ) );
var radius = offset.length() * scale;
// restrict radius to be between desired limits
radius = Math.max( this.minDistance, Math.min( this.maxDistance, radius ) );
// move target to panned location
this.target.add( pan );
offset.x = radius * Math.sin( phi ) * Math.sin( theta );
offset.y = radius * Math.cos( phi );
offset.z = radius * Math.sin( phi ) * Math.cos( theta );
// rotate offset back to "camera-up-vector-is-up" space
offset.applyQuaternion( quatInverse );
position.copy( this.target ).add( offset );
this.object.lookAt( this.target );
thetaDelta = 0;
phiDelta = 0;
scale = 1;
pan.set( 0, 0, 0 );
/*
* update condition is:
* min(camera displacement, camera rotation in radians)^2 > EPS
* using small-angle approximation cos(x/2) = 1 - x^2 / 8
*/
if ( lastPosition.distanceToSquared( this.object.position ) > EPS
|| 8 * (1 - lastQuaternion.dot(this.object.quaternion)) > EPS ) {
if ( ignoreUpdate !== true ) { this.dispatchEvent( changeEvent ); }
lastPosition.copy( this.object.position );
lastQuaternion.copy (this.object.quaternion );
}
};
this.reset = function () {
state = STATE.NONE;
this.target.copy( this.target0 );
this.object.position.copy( this.position0 );
this.object.zoom = this.zoom0;
this.object.updateProjectionMatrix();
this.dispatchEvent( changeEvent );
this.update();
};
this.getPolarAngle = function () {
return phi;
};
this.getAzimuthalAngle = function () {
return theta;
};
function getAutoRotationAngle() {
return 2 * Math.PI / 60 / 60 * scope.autoRotateSpeed;
}
function getZoomScale() {
return Math.pow( 0.95, scope.zoomSpeed );
}
function onMouseDown( event ) {
momentumOn = false;
momentumLeft = momentumUp = 0;
if ( scope.enabled === false ) return;
event.preventDefault();
if ( event.button === scope.mouseButtons.ORBIT ) {
if ( scope.noRotate === true ) return;
state = STATE.ROTATE;
rotateStart.set( event.clientX, event.clientY );
} else if ( event.button === scope.mouseButtons.ZOOM ) {
if ( scope.noZoom === true ) return;
state = STATE.DOLLY;
dollyStart.set( event.clientX, event.clientY );
} else if ( event.button === scope.mouseButtons.PAN ) {
if ( scope.noPan === true ) return;
state = STATE.PAN;
panStart.set( event.clientX, event.clientY );
}
if ( state !== STATE.NONE ) {
document.addEventListener( 'mousemove', onMouseMove, false );
document.addEventListener( 'mouseup', onMouseUp, false );
scope.dispatchEvent( startEvent );
}
scope.update();
}
function onMouseMove( event ) {
if ( scope.enabled === false ) return;
event.preventDefault();
var element = scope.domElement === document ? scope.domElement.body : scope.domElement;
if ( state === STATE.ROTATE ) {
if ( scope.noRotate === true ) return;
rotateEnd.set( event.clientX, event.clientY );
rotateDelta.subVectors( rotateEnd, rotateStart );
// rotating across whole screen goes 360 degrees around
scope.rotateLeft( 2 * Math.PI * rotateDelta.x / element.clientWidth * scope.rotateSpeed );
// rotating up and down along whole screen attempts to go 360, but limited to 180
scope.rotateUp( 2 * Math.PI * rotateDelta.y / element.clientHeight * scope.rotateSpeed );
rotateStart.copy( rotateEnd );
if( eventPrevious ){
momentumLeft = event.clientX - eventPrevious.clientX;
momentumUp = event.clientY - eventPrevious.clientY;
}
eventPrevious = event;
} else if ( state === STATE.DOLLY ) {
if ( scope.noZoom === true ) return;
dollyEnd.set( event.clientX, event.clientY );
dollyDelta.subVectors( dollyEnd, dollyStart );
if ( dollyDelta.y > 0 ) {
scope.dollyIn();
} else if ( dollyDelta.y < 0 ) {
scope.dollyOut();
}
dollyStart.copy( dollyEnd );
} else if ( state === STATE.PAN ) {
if ( scope.noPan === true ) return;
panEnd.set( event.clientX, event.clientY );
panDelta.subVectors( panEnd, panStart );
scope.pan( panDelta.x, panDelta.y );
panStart.copy( panEnd );
}
if ( state !== STATE.NONE ) scope.update();
}
function onMouseUp( /* event */ ) {
momentumOn = true;
eventPrevious = undefined;
if ( scope.enabled === false ) return;
document.removeEventListener( 'mousemove', onMouseMove, false );
document.removeEventListener( 'mouseup', onMouseUp, false );
scope.dispatchEvent( endEvent );
state = STATE.NONE;
}
function onMouseWheel( event ) {
if ( scope.enabled === false || scope.noZoom === true || state !== STATE.NONE ) return;
event.preventDefault();
event.stopPropagation();
var delta = 0;
if ( event.wheelDelta !== undefined ) { // WebKit / Opera / Explorer 9
delta = event.wheelDelta;
} else if ( event.detail !== undefined ) { // Firefox
delta = - event.detail;
}
if ( delta > 0 ) {
// scope.dollyOut();
scope.object.fov = ( scope.object.fov < scope.maxFov )
? scope.object.fov + 1
: scope.maxFov;
scope.object.updateProjectionMatrix();
} else if ( delta < 0 ) {
// scope.dollyIn();
scope.object.fov = ( scope.object.fov > scope.minFov )
? scope.object.fov - 1
: scope.minFov;
scope.object.updateProjectionMatrix();
}
scope.update();
scope.dispatchEvent( changeEvent );
scope.dispatchEvent( startEvent );
scope.dispatchEvent( endEvent );
}
function onKeyUp ( event ) {
switch ( event.keyCode ) {
case scope.keys.UP:
keyUp = false;
break;
case scope.keys.BOTTOM:
keyBottom = false;
break;
case scope.keys.LEFT:
keyLeft = false;
break;
case scope.keys.RIGHT:
keyRight = false;
break;
}
}
function onKeyDown( event ) {
if ( scope.enabled === false || scope.noKeys === true || scope.noRotate === true ) return;
switch ( event.keyCode ) {
case scope.keys.UP:
keyUp = true;
break;
case scope.keys.BOTTOM:
keyBottom = true;
break;
case scope.keys.LEFT:
keyLeft = true;
break;
case scope.keys.RIGHT:
keyRight = true;
break;
}
if (keyUp || keyBottom || keyLeft || keyRight) {
momentumOn = true;
if (keyUp) momentumUp = - scope.rotateSpeed * scope.momentumKeydownFactor;
if (keyBottom) momentumUp = scope.rotateSpeed * scope.momentumKeydownFactor;
if (keyLeft) momentumLeft = - scope.rotateSpeed * scope.momentumKeydownFactor;
if (keyRight) momentumLeft = scope.rotateSpeed * scope.momentumKeydownFactor;
}
}
function touchstart( event ) {
momentumOn = false;
momentumLeft = momentumUp = 0;
if ( scope.enabled === false ) return;
switch ( event.touches.length ) {
case 1: // one-fingered touch: rotate
if ( scope.noRotate === true ) return;
state = STATE.TOUCH_ROTATE;
rotateStart.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
break;
case 2: // two-fingered touch: dolly
if ( scope.noZoom === true ) return;
state = STATE.TOUCH_DOLLY;
var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX;
var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY;
var distance = Math.sqrt( dx * dx + dy * dy );
dollyStart.set( 0, distance );
break;
case 3: // three-fingered touch: pan
if ( scope.noPan === true ) return;
state = STATE.TOUCH_PAN;
panStart.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
break;
default:
state = STATE.NONE;
}
if ( state !== STATE.NONE ) scope.dispatchEvent( startEvent );
}
function touchmove( event ) {
if ( scope.enabled === false ) return;
event.preventDefault();
event.stopPropagation();
var element = scope.domElement === document ? scope.domElement.body : scope.domElement;
switch ( event.touches.length ) {
case 1: // one-fingered touch: rotate
if ( scope.noRotate === true ) return;
if ( state !== STATE.TOUCH_ROTATE ) return;
rotateEnd.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
rotateDelta.subVectors( rotateEnd, rotateStart );
// rotating across whole screen goes 360 degrees around
scope.rotateLeft( 2 * Math.PI * rotateDelta.x / element.clientWidth * scope.rotateSpeed );
// rotating up and down along whole screen attempts to go 360, but limited to 180
scope.rotateUp( 2 * Math.PI * rotateDelta.y / element.clientHeight * scope.rotateSpeed );
rotateStart.copy( rotateEnd );
if( eventPrevious ){
momentumLeft = event.touches[ 0 ].pageX - eventPrevious.pageX;
momentumUp = event.touches[ 0 ].pageY - eventPrevious.pageY;
}
eventPrevious = {
pageX: event.touches[ 0 ].pageX,
pageY: event.touches[ 0 ].pageY,
};
scope.update();
break;
case 2: // two-fingered touch: dolly
if ( scope.noZoom === true ) return;
if ( state !== STATE.TOUCH_DOLLY ) return;
var dx = event.touches[ 0 ].pageX - event.touches[ 1 ].pageX;
var dy = event.touches[ 0 ].pageY - event.touches[ 1 ].pageY;
var distance = Math.sqrt( dx * dx + dy * dy );
dollyEnd.set( 0, distance );
dollyDelta.subVectors( dollyEnd, dollyStart );
if ( dollyDelta.y < 0 ) {
scope.object.fov = ( scope.object.fov < scope.maxFov )
? scope.object.fov + 1
: scope.maxFov;
scope.object.updateProjectionMatrix();
} else if ( dollyDelta.y > 0 ) {
scope.object.fov = ( scope.object.fov > scope.minFov )
? scope.object.fov - 1
: scope.minFov;
scope.object.updateProjectionMatrix();
}
dollyStart.copy( dollyEnd );
scope.update();
scope.dispatchEvent( changeEvent );
break;
case 3: // three-fingered touch: pan
if ( scope.noPan === true ) return;
if ( state !== STATE.TOUCH_PAN ) return;
panEnd.set( event.touches[ 0 ].pageX, event.touches[ 0 ].pageY );
panDelta.subVectors( panEnd, panStart );
scope.pan( panDelta.x, panDelta.y );
panStart.copy( panEnd );
scope.update();
break;
default:
state = STATE.NONE;
}
}
function touchend( /* event */ ) {
momentumOn = true;
eventPrevious = undefined;
if ( scope.enabled === false ) return;
scope.dispatchEvent( endEvent );
state = STATE.NONE;
}
this.dispose = function() {
this.domElement.removeEventListener( 'mousedown', onMouseDown );
this.domElement.removeEventListener( 'mousewheel', onMouseWheel );
this.domElement.removeEventListener( 'DOMMouseScroll', onMouseWheel );
this.domElement.removeEventListener( 'touchstart', touchstart );
this.domElement.removeEventListener( 'touchend', touchend );
this.domElement.removeEventListener( 'touchmove', touchmove );
window.removeEventListener( 'keyup', onKeyUp );
window.removeEventListener( 'keydown', onKeyDown );
};
// this.domElement.addEventListener( 'contextmenu', function ( event ) { event.preventDefault(); }, false );
this.domElement.addEventListener( 'mousedown', onMouseDown, { passive: false } );
this.domElement.addEventListener( 'mousewheel', onMouseWheel, { passive: false } );
this.domElement.addEventListener( 'DOMMouseScroll', onMouseWheel, { passive: false } ); // firefox
this.domElement.addEventListener( 'touchstart', touchstart, { passive: false } );
this.domElement.addEventListener( 'touchend', touchend, { passive: false } );
this.domElement.addEventListener( 'touchmove', touchmove, { passive: false } );
window.addEventListener( 'keyup', onKeyUp, { passive: false } );
window.addEventListener( 'keydown', onKeyDown, { passive: false } );
// force an update at start
this.update();
};
OrbitControls.prototype = Object.assign( Object.create( THREE.EventDispatcher.prototype ), {
constructor: OrbitControls
} );
export { OrbitControls };