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pannellum.js
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pannellum.js
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/*
* Pannellum - An HTML5 based Panorama Viewer
* Copyright (c) 2011-2019 Matthew Petroff
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
window.pannellum = (function(window, document, undefined) {
'use strict';
/**
* Creates a new panorama viewer.
* @constructor
* @param {HTMLElement|string} container - The container (div) element for the
* viewer, or its ID.
* @param {Object} initialConfig - Inital configuration for viewer.
*/
function Viewer(container, initialConfig) {
var _this = this;
// Declare variables
var config,
renderer,
preview,
isUserInteracting = false,
latestInteraction = Date.now(),
onPointerDownPointerX = 0,
onPointerDownPointerY = 0,
onPointerDownPointerDist = -1,
onPointerDownYaw = 0,
onPointerDownPitch = 0,
keysDown = new Array(10),
fullscreenActive = false,
loaded,
error = false,
isTimedOut = false,
listenersAdded = false,
panoImage,
prevTime,
speed = {'yaw': 0, 'pitch': 0, 'hfov': 0},
animating = false,
orientation = false,
orientationYawOffset = 0,
autoRotateStart,
autoRotateSpeed = 0,
origHfov,
origPitch,
animatedMove = {},
externalEventListeners = {},
specifiedPhotoSphereExcludes = [],
update = false, // Should we update when still to render dynamic content
eps = 1e-6,
hotspotsCreated = false;
var defaultConfig = {
hfov: 100,
minHfov: 50,
multiResMinHfov: false,
maxHfov: 120,
pitch: 0,
minPitch: undefined,
maxPitch: undefined,
yaw: 0,
minYaw: -180,
maxYaw: 180,
roll: 0,
haov: 360,
vaov: 180,
vOffset: 0,
autoRotate: false,
autoRotateInactivityDelay: -1,
autoRotateStopDelay: undefined,
type: 'equirectangular',
northOffset: 0,
showFullscreenCtrl: true,
dynamic: false,
dynamicUpdate: false,
doubleClickZoom: true,
keyboardZoom: true,
mouseZoom: true,
showZoomCtrl: true,
autoLoad: false,
showControls: true,
orientationOnByDefault: false,
hotSpotDebug: false,
backgroundColor: [0, 0, 0],
avoidShowingBackground: false,
animationTimingFunction: timingFunction,
draggable: true,
disableKeyboardCtrl: false,
crossOrigin: 'anonymous',
touchPanSpeedCoeffFactor: 1,
capturedKeyNumbers: [16, 17, 27, 37, 38, 39, 40, 61, 65, 68, 83, 87, 107, 109, 173, 187, 189],
friction: 0.15
};
// Translatable / configurable strings
// Some strings contain '%s', which is a placeholder for inserted values
// When setting strings in external configuration, `\n` should be used instead of `<br>` to insert line breaks
defaultConfig.strings = {
// Labels
loadButtonLabel: 'Click to<br>Load<br>Panorama',
loadingLabel: 'Loading...',
bylineLabel: 'by %s', // One substitution: author
// Errors
noPanoramaError: 'No panorama image was specified.',
fileAccessError: 'The file %s could not be accessed.', // One substitution: file URL
malformedURLError: 'There is something wrong with the panorama URL.',
iOS8WebGLError: "Due to iOS 8's broken WebGL implementation, only " +
"progressive encoded JPEGs work for your device (this " +
"panorama uses standard encoding).",
genericWebGLError: 'Your browser does not have the necessary WebGL support to display this panorama.',
textureSizeError: 'This panorama is too big for your device! It\'s ' +
'%spx wide, but your device only supports images up to ' +
'%spx wide. Try another device.' +
' (If you\'re the author, try scaling down the image.)', // Two substitutions: image width, max image width
unknownError: 'Unknown error. Check developer console.',
};
// Initialize container
container = typeof container === 'string' ? document.getElementById(container) : container;
container.classList.add('pnlm-container');
container.tabIndex = 0;
// Create container for ui
var uiContainer = document.createElement('div');
uiContainer.className = 'pnlm-ui';
container.appendChild(uiContainer);
// Create container for renderer
var renderContainer = document.createElement('div');
renderContainer.className = 'pnlm-render-container';
container.appendChild(renderContainer);
var dragFix = document.createElement('div');
dragFix.className = 'pnlm-dragfix';
uiContainer.appendChild(dragFix);
// Display about information on right click
var aboutMsg = document.createElement('span');
aboutMsg.className = 'pnlm-about-msg';
aboutMsg.innerHTML = '<a href="https://pannellum.org/" target="_blank">Pannellum</a>';
uiContainer.appendChild(aboutMsg);
dragFix.addEventListener('contextmenu', aboutMessage);
// Create info display
var infoDisplay = {};
// Hot spot debug indicator
var hotSpotDebugIndicator = document.createElement('div');
hotSpotDebugIndicator.className = 'pnlm-sprite pnlm-hot-spot-debug-indicator';
uiContainer.appendChild(hotSpotDebugIndicator);
// Panorama info
infoDisplay.container = document.createElement('div');
infoDisplay.container.className = 'pnlm-panorama-info';
infoDisplay.title = document.createElement('div');
infoDisplay.title.className = 'pnlm-title-box';
infoDisplay.container.appendChild(infoDisplay.title);
infoDisplay.author = document.createElement('div');
infoDisplay.author.className = 'pnlm-author-box';
infoDisplay.container.appendChild(infoDisplay.author);
uiContainer.appendChild(infoDisplay.container);
// Load box
infoDisplay.load = {};
infoDisplay.load.box = document.createElement('div');
infoDisplay.load.box.className = 'pnlm-load-box';
infoDisplay.load.boxp = document.createElement('p');
infoDisplay.load.box.appendChild(infoDisplay.load.boxp);
infoDisplay.load.lbox = document.createElement('div');
infoDisplay.load.lbox.className = 'pnlm-lbox';
infoDisplay.load.lbox.innerHTML = '<div class="pnlm-loading"></div>';
infoDisplay.load.box.appendChild(infoDisplay.load.lbox);
infoDisplay.load.lbar = document.createElement('div');
infoDisplay.load.lbar.className = 'pnlm-lbar';
infoDisplay.load.lbarFill = document.createElement('div');
infoDisplay.load.lbarFill.className = 'pnlm-lbar-fill';
infoDisplay.load.lbar.appendChild(infoDisplay.load.lbarFill);
infoDisplay.load.box.appendChild(infoDisplay.load.lbar);
infoDisplay.load.msg = document.createElement('p');
infoDisplay.load.msg.className = 'pnlm-lmsg';
infoDisplay.load.box.appendChild(infoDisplay.load.msg);
uiContainer.appendChild(infoDisplay.load.box);
// Error message
infoDisplay.errorMsg = document.createElement('div');
infoDisplay.errorMsg.className = 'pnlm-error-msg pnlm-info-box';
uiContainer.appendChild(infoDisplay.errorMsg);
// Create controls
var controls = {};
controls.container = document.createElement('div');
controls.container.className = 'pnlm-controls-container';
uiContainer.appendChild(controls.container);
// Load button
controls.load = document.createElement('div');
controls.load.className = 'pnlm-load-button';
controls.load.addEventListener('click', function() {
processOptions();
load();
});
uiContainer.appendChild(controls.load);
// Zoom controls
controls.zoom = document.createElement('div');
controls.zoom.className = 'pnlm-zoom-controls pnlm-controls';
controls.zoomIn = document.createElement('div');
controls.zoomIn.className = 'pnlm-zoom-in pnlm-sprite pnlm-control';
controls.zoomIn.addEventListener('click', zoomIn);
controls.zoom.appendChild(controls.zoomIn);
controls.zoomOut = document.createElement('div');
controls.zoomOut.className = 'pnlm-zoom-out pnlm-sprite pnlm-control';
controls.zoomOut.addEventListener('click', zoomOut);
controls.zoom.appendChild(controls.zoomOut);
controls.container.appendChild(controls.zoom);
// Fullscreen toggle
controls.fullscreen = document.createElement('div');
controls.fullscreen.addEventListener('click', toggleFullscreen);
controls.fullscreen.className = 'pnlm-fullscreen-toggle-button pnlm-sprite pnlm-fullscreen-toggle-button-inactive pnlm-controls pnlm-control';
if (document.fullscreenEnabled || document.mozFullScreenEnabled || document.webkitFullscreenEnabled || document.msFullscreenEnabled)
controls.container.appendChild(controls.fullscreen);
// Device orientation toggle
controls.orientation = document.createElement('div');
controls.orientation.addEventListener('click', function(e) {
if (orientation)
stopOrientation();
else
startOrientation();
});
controls.orientation.addEventListener('mousedown', function(e) {e.stopPropagation();});
controls.orientation.addEventListener('touchstart', function(e) {e.stopPropagation();});
controls.orientation.addEventListener('pointerdown', function(e) {e.stopPropagation();});
controls.orientation.className = 'pnlm-orientation-button pnlm-orientation-button-inactive pnlm-sprite pnlm-controls pnlm-control';
var orientationSupport, startOrientationIfSupported = false;
function deviceOrientationTest(e) {
window.removeEventListener('deviceorientation', deviceOrientationTest);
if (e && e.alpha !== null && e.beta !== null && e.gamma !== null) {
controls.container.appendChild(controls.orientation);
orientationSupport = true;
if (startOrientationIfSupported)
startOrientation();
} else {
orientationSupport = false;
}
}
if (window.DeviceOrientationEvent) {
window.addEventListener('deviceorientation', deviceOrientationTest);
} else {
orientationSupport = false;
}
// Compass
var compass = document.createElement('div');
compass.className = 'pnlm-compass pnlm-controls pnlm-control';
uiContainer.appendChild(compass);
// Load and process configuration
if (initialConfig.firstScene) {
// Activate first scene if specified in URL
mergeConfig(initialConfig.firstScene);
} else if (initialConfig.default && initialConfig.default.firstScene) {
// Activate first scene if specified in file
mergeConfig(initialConfig.default.firstScene);
} else {
mergeConfig(null);
}
processOptions(true);
/**
* Initializes viewer.
* @private
*/
function init() {
// Display an error for IE 9 as it doesn't work but also doesn't otherwise
// show an error (older versions don't work at all)
// Based on: http://stackoverflow.com/a/10965203
var div = document.createElement("div");
div.innerHTML = "<!--[if lte IE 9]><i></i><![endif]-->";
if (div.getElementsByTagName("i").length == 1) {
anError();
return;
}
origHfov = config.hfov;
origPitch = config.pitch;
var i, p;
if (config.type == 'cubemap') {
panoImage = [];
for (i = 0; i < 6; i++) {
panoImage.push(new Image());
panoImage[i].crossOrigin = config.crossOrigin;
}
infoDisplay.load.lbox.style.display = 'block';
infoDisplay.load.lbar.style.display = 'none';
} else if (config.type == 'multires') {
var c = JSON.parse(JSON.stringify(config.multiRes)); // Deep copy
// Avoid "undefined" in path, check (optional) multiRes.basePath, too
// Use only multiRes.basePath if it's an absolute URL
if (config.basePath && config.multiRes.basePath &&
!(/^(?:[a-z]+:)?\/\//i.test(config.multiRes.basePath))) {
c.basePath = config.basePath + config.multiRes.basePath;
} else if (config.multiRes.basePath) {
c.basePath = config.multiRes.basePath;
} else if(config.basePath) {
c.basePath = config.basePath;
}
panoImage = c;
} else {
if (config.dynamic === true) {
panoImage = config.panorama;
} else {
if (config.panorama === undefined) {
anError(config.strings.noPanoramaError);
return;
}
panoImage = new Image();
}
}
// Configure image loading
if (config.type == 'cubemap') {
// Quick loading counter for synchronous loading
var itemsToLoad = 6;
var onLoad = function() {
itemsToLoad--;
if (itemsToLoad === 0) {
onImageLoad();
}
};
var onError = function(e) {
var a = document.createElement('a');
a.href = e.target.src;
a.textContent = a.href;
anError(config.strings.fileAccessError.replace('%s', a.outerHTML));
};
for (i = 0; i < panoImage.length; i++) {
p = config.cubeMap[i];
if (p == "null") { // support partial cubemap image with explicitly empty faces
console.log('Will use background instead of missing cubemap face ' + i);
onLoad();
} else {
if (config.basePath && !absoluteURL(p)) {
p = config.basePath + p;
}
panoImage[i].onload = onLoad;
panoImage[i].onerror = onError;
panoImage[i].src = sanitizeURL(p);
}
}
} else if (config.type == 'multires') {
onImageLoad();
} else {
p = '';
if (config.basePath) {
p = config.basePath;
}
if (config.dynamic !== true) {
// Still image
p = absoluteURL(config.panorama) ? config.panorama : p + config.panorama;
panoImage.onload = function() {
window.URL.revokeObjectURL(this.src); // Clean up
onImageLoad();
};
var xhr = new XMLHttpRequest();
xhr.onloadend = function() {
if (xhr.status != 200) {
// Display error if image can't be loaded
var a = document.createElement('a');
a.href = p;
a.textContent = a.href;
anError(config.strings.fileAccessError.replace('%s', a.outerHTML));
}
var img = this.response;
parseGPanoXMP(img);
infoDisplay.load.msg.innerHTML = '';
};
xhr.onprogress = function(e) {
if (e.lengthComputable) {
// Display progress
var percent = e.loaded / e.total * 100;
infoDisplay.load.lbarFill.style.width = percent + '%';
var unit, numerator, denominator;
if (e.total > 1e6) {
unit = 'MB';
numerator = (e.loaded / 1e6).toFixed(2);
denominator = (e.total / 1e6).toFixed(2);
} else if (e.total > 1e3) {
unit = 'kB';
numerator = (e.loaded / 1e3).toFixed(1);
denominator = (e.total / 1e3).toFixed(1);
} else {
unit = 'B';
numerator = e.loaded;
denominator = e.total;
}
infoDisplay.load.msg.innerHTML = numerator + ' / ' + denominator + ' ' + unit;
} else {
// Display loading spinner
infoDisplay.load.lbox.style.display = 'block';
infoDisplay.load.lbar.style.display = 'none';
}
};
try {
xhr.open('GET', p, true);
} catch (e) {
// Malformed URL
anError(config.strings.malformedURLError);
}
xhr.responseType = 'blob';
xhr.setRequestHeader('Accept', 'image/*,*/*;q=0.9');
xhr.withCredentials = config.crossOrigin === 'use-credentials';
xhr.send();
}
}
if (config.draggable)
uiContainer.classList.add('pnlm-grab');
uiContainer.classList.remove('pnlm-grabbing');
// Properly handle switching to dynamic scenes
update = config.dynamicUpdate === true;
if (config.dynamic) {
panoImage = config.panorama;
onImageLoad();
}
}
/**
* Test if URL is absolute or relative.
* @private
* @param {string} url - URL to test
* @returns {boolean} True if absolute, else false
*/
function absoluteURL(url) {
// From http://stackoverflow.com/a/19709846
return new RegExp('^(?:[a-z]+:)?//', 'i').test(url) || url[0] == '/' || url.slice(0, 5) == 'blob:';
}
/**
* Create renderer and initialize event listeners once image is loaded.
* @private
*/
function onImageLoad() {
if (!renderer)
renderer = new libpannellum.renderer(renderContainer);
// Only add event listeners once
if (!listenersAdded) {
listenersAdded = true;
dragFix.addEventListener('mousedown', onDocumentMouseDown, false);
document.addEventListener('mousemove', onDocumentMouseMove, false);
document.addEventListener('mouseup', onDocumentMouseUp, false);
if (config.mouseZoom) {
uiContainer.addEventListener('mousewheel', onDocumentMouseWheel, false);
uiContainer.addEventListener('DOMMouseScroll', onDocumentMouseWheel, false);
}
if (config.doubleClickZoom) {
dragFix.addEventListener('dblclick', onDocumentDoubleClick, false);
}
container.addEventListener('mozfullscreenchange', onFullScreenChange, false);
container.addEventListener('webkitfullscreenchange', onFullScreenChange, false);
container.addEventListener('msfullscreenchange', onFullScreenChange, false);
container.addEventListener('fullscreenchange', onFullScreenChange, false);
window.addEventListener('resize', onDocumentResize, false);
window.addEventListener('orientationchange', onDocumentResize, false);
if (!config.disableKeyboardCtrl) {
container.addEventListener('keydown', onDocumentKeyPress, false);
container.addEventListener('keyup', onDocumentKeyUp, false);
container.addEventListener('blur', clearKeys, false);
}
document.addEventListener('mouseleave', onDocumentMouseUp, false);
if (document.documentElement.style.pointerAction === '' &&
document.documentElement.style.touchAction === '') {
dragFix.addEventListener('pointerdown', onDocumentPointerDown, false);
dragFix.addEventListener('pointermove', onDocumentPointerMove, false);
dragFix.addEventListener('pointerup', onDocumentPointerUp, false);
dragFix.addEventListener('pointerleave', onDocumentPointerUp, false);
} else {
dragFix.addEventListener('touchstart', onDocumentTouchStart, false);
dragFix.addEventListener('touchmove', onDocumentTouchMove, false);
dragFix.addEventListener('touchend', onDocumentTouchEnd, false);
}
// Deal with MS pointer events
if (window.navigator.pointerEnabled)
container.style.touchAction = 'none';
}
renderInit();
setHfov(config.hfov); // possibly adapt hfov after configuration and canvas is complete; prevents empty space on top or bottom by zomming out too much
setTimeout(function(){isTimedOut = true;}, 500);
}
/**
* Parses Google Photo Sphere XMP Metadata.
* https://developers.google.com/photo-sphere/metadata/
* @private
* @param {Image} image - Image to read XMP metadata from.
*/
function parseGPanoXMP(image) {
var reader = new FileReader();
reader.addEventListener('loadend', function() {
var img = reader.result;
// This awful browser specific test exists because iOS 8 does not work
// with non-progressive encoded JPEGs.
if (navigator.userAgent.toLowerCase().match(/(iphone|ipod|ipad).* os 8_/)) {
var flagIndex = img.indexOf('\xff\xc2');
if (flagIndex < 0 || flagIndex > 65536)
anError(config.strings.iOS8WebGLError);
}
var start = img.indexOf('<x:xmpmeta');
if (start > -1 && config.ignoreGPanoXMP !== true) {
var xmpData = img.substring(start, img.indexOf('</x:xmpmeta>') + 12);
// Extract the requested tag from the XMP data
var getTag = function(tag) {
var result;
if (xmpData.indexOf(tag + '="') >= 0) {
result = xmpData.substring(xmpData.indexOf(tag + '="') + tag.length + 2);
result = result.substring(0, result.indexOf('"'));
} else if (xmpData.indexOf(tag + '>') >= 0) {
result = xmpData.substring(xmpData.indexOf(tag + '>') + tag.length + 1);
result = result.substring(0, result.indexOf('<'));
}
if (result !== undefined) {
return Number(result);
}
return null;
};
// Relevant XMP data
var xmp = {
fullWidth: getTag('GPano:FullPanoWidthPixels'),
croppedWidth: getTag('GPano:CroppedAreaImageWidthPixels'),
fullHeight: getTag('GPano:FullPanoHeightPixels'),
croppedHeight: getTag('GPano:CroppedAreaImageHeightPixels'),
topPixels: getTag('GPano:CroppedAreaTopPixels'),
heading: getTag('GPano:PoseHeadingDegrees'),
horizonPitch: getTag('GPano:PosePitchDegrees'),
horizonRoll: getTag('GPano:PoseRollDegrees')
};
if (xmp.fullWidth !== null && xmp.croppedWidth !== null &&
xmp.fullHeight !== null && xmp.croppedHeight !== null &&
xmp.topPixels !== null) {
// Set up viewer using GPano XMP data
if (specifiedPhotoSphereExcludes.indexOf('haov') < 0)
config.haov = xmp.croppedWidth / xmp.fullWidth * 360;
if (specifiedPhotoSphereExcludes.indexOf('vaov') < 0)
config.vaov = xmp.croppedHeight / xmp.fullHeight * 180;
if (specifiedPhotoSphereExcludes.indexOf('vOffset') < 0)
config.vOffset = ((xmp.topPixels + xmp.croppedHeight / 2) / xmp.fullHeight - 0.5) * -180;
if (xmp.heading !== null && specifiedPhotoSphereExcludes.indexOf('northOffset') < 0) {
// TODO: make sure this works correctly for partial panoramas
config.northOffset = xmp.heading;
if (config.compass !== false) {
config.compass = true;
}
}
if (xmp.horizonPitch !== null && xmp.horizonRoll !== null) {
if (specifiedPhotoSphereExcludes.indexOf('horizonPitch') < 0)
config.horizonPitch = xmp.horizonPitch;
if (specifiedPhotoSphereExcludes.indexOf('horizonRoll') < 0)
config.horizonRoll = xmp.horizonRoll;
}
// TODO: add support for initial view settings
}
}
// Load panorama
panoImage.src = window.URL.createObjectURL(image);
});
if (reader.readAsBinaryString !== undefined)
reader.readAsBinaryString(image);
else
reader.readAsText(image);
}
/**
* Displays an error message.
* @private
* @param {string} errorMsg - Error message to display. If not specified, a
* generic WebGL error is displayed.
*/
function anError(errorMsg) {
if (errorMsg === undefined)
errorMsg = config.strings.genericWebGLError;
infoDisplay.errorMsg.innerHTML = '<p>' + errorMsg + '</p>';
controls.load.style.display = 'none';
infoDisplay.load.box.style.display = 'none';
infoDisplay.errorMsg.style.display = 'table';
error = true;
renderContainer.style.display = 'none';
fireEvent('error', errorMsg);
}
/**
* Hides error message display.
* @private
*/
function clearError() {
if (error) {
infoDisplay.load.box.style.display = 'none';
infoDisplay.errorMsg.style.display = 'none';
error = false;
fireEvent('errorcleared');
}
}
/**
* Displays about message.
* @private
* @param {MouseEvent} event - Right click location
*/
function aboutMessage(event) {
var pos = mousePosition(event);
aboutMsg.style.left = pos.x + 'px';
aboutMsg.style.top = pos.y + 'px';
clearTimeout(aboutMessage.t1);
clearTimeout(aboutMessage.t2);
aboutMsg.style.display = 'block';
aboutMsg.style.opacity = 1;
aboutMessage.t1 = setTimeout(function() {aboutMsg.style.opacity = 0;}, 2000);
aboutMessage.t2 = setTimeout(function() {aboutMsg.style.display = 'none';}, 2500);
event.preventDefault();
}
/**
* Calculate mouse position relative to top left of viewer container.
* @private
* @param {MouseEvent} event - Mouse event to use in calculation
* @returns {Object} Calculated X and Y coordinates
*/
function mousePosition(event) {
var bounds = container.getBoundingClientRect();
var pos = {};
// pageX / pageY needed for iOS
pos.x = (event.clientX || event.pageX) - bounds.left;
pos.y = (event.clientY || event.pageY) - bounds.top;
return pos;
}
/**
* Event handler for mouse clicks. Initializes panning. Prints center and click
* location coordinates when hot spot debugging is enabled.
* @private
* @param {MouseEvent} event - Document mouse down event.
*/
function onDocumentMouseDown(event) {
// Override default action
event.preventDefault();
// But not all of it
container.focus();
// Only do something if the panorama is loaded
if (!loaded || !config.draggable) {
return;
}
// Calculate mouse position relative to top left of viewer container
var pos = mousePosition(event);
// Log pitch / yaw of mouse click when debugging / placing hot spots
if (config.hotSpotDebug) {
var coords = mouseEventToCoords(event);
console.log('Pitch: ' + coords[0] + ', Yaw: ' + coords[1] + ', Center Pitch: ' +
config.pitch + ', Center Yaw: ' + config.yaw + ', HFOV: ' + config.hfov);
}
// Turn off auto-rotation if enabled
stopAnimation();
stopOrientation();
config.roll = 0;
speed.hfov = 0;
isUserInteracting = true;
latestInteraction = Date.now();
onPointerDownPointerX = pos.x;
onPointerDownPointerY = pos.y;
onPointerDownYaw = config.yaw;
onPointerDownPitch = config.pitch;
uiContainer.classList.add('pnlm-grabbing');
uiContainer.classList.remove('pnlm-grab');
fireEvent('mousedown', event);
animateInit();
}
/**
* Event handler for double clicks. Zooms in at clicked location
* @private
* @param {MouseEvent} event - Document mouse down event.
*/
function onDocumentDoubleClick(event) {
if (config.minHfov === config.hfov) {
_this.setHfov(origHfov, 1000);
} else {
var coords = mouseEventToCoords(event);
_this.lookAt(coords[0], coords[1], config.minHfov, 1000);
}
}
/**
* Calculate panorama pitch and yaw from location of mouse event.
* @private
* @param {MouseEvent} event - Document mouse down event.
* @returns {number[]} [pitch, yaw]
*/
function mouseEventToCoords(event) {
var pos = mousePosition(event);
var canvas = renderer.getCanvas();
var canvasWidth = canvas.clientWidth,
canvasHeight = canvas.clientHeight;
var x = pos.x / canvasWidth * 2 - 1;
var y = (1 - pos.y / canvasHeight * 2) * canvasHeight / canvasWidth;
var focal = 1 / Math.tan(config.hfov * Math.PI / 360);
var s = Math.sin(config.pitch * Math.PI / 180);
var c = Math.cos(config.pitch * Math.PI / 180);
var a = focal * c - y * s;
var root = Math.sqrt(x*x + a*a);
var pitch = Math.atan((y * c + focal * s) / root) * 180 / Math.PI;
var yaw = Math.atan2(x / root, a / root) * 180 / Math.PI + config.yaw;
if (yaw < -180)
yaw += 360;
if (yaw > 180)
yaw -= 360;
return [pitch, yaw];
}
/**
* Event handler for mouse moves. Pans center of view.
* @private
* @param {MouseEvent} event - Document mouse move event.
*/
function onDocumentMouseMove(event) {
if (isUserInteracting && loaded) {
latestInteraction = Date.now();
var canvas = renderer.getCanvas();
var canvasWidth = canvas.clientWidth,
canvasHeight = canvas.clientHeight;
var pos = mousePosition(event);
//TODO: This still isn't quite right
var yaw = ((Math.atan(onPointerDownPointerX / canvasWidth * 2 - 1) - Math.atan(pos.x / canvasWidth * 2 - 1)) * 180 / Math.PI * config.hfov / 90) + onPointerDownYaw;
speed.yaw = (yaw - config.yaw) % 360 * 0.2;
config.yaw = yaw;
var vfov = 2 * Math.atan(Math.tan(config.hfov/360*Math.PI) * canvasHeight / canvasWidth) * 180 / Math.PI;
var pitch = ((Math.atan(pos.y / canvasHeight * 2 - 1) - Math.atan(onPointerDownPointerY / canvasHeight * 2 - 1)) * 180 / Math.PI * vfov / 90) + onPointerDownPitch;
speed.pitch = (pitch - config.pitch) * 0.2;
config.pitch = pitch;
}
}
/**
* Event handler for mouse up events. Stops panning.
* @private
*/
function onDocumentMouseUp(event) {
if (!isUserInteracting) {
return;
}
isUserInteracting = false;
if (Date.now() - latestInteraction > 15) {
// Prevents jump when user rapidly moves mouse, stops, and then
// releases the mouse button
speed.pitch = speed.yaw = 0;
}
uiContainer.classList.add('pnlm-grab');
uiContainer.classList.remove('pnlm-grabbing');
latestInteraction = Date.now();
fireEvent('mouseup', event);
}
/**
* Event handler for touches. Initializes panning if one touch or zooming if
* two touches.
* @private
* @param {TouchEvent} event - Document touch start event.
*/
function onDocumentTouchStart(event) {
// Only do something if the panorama is loaded
if (!loaded || !config.draggable) {
return;
}
// Turn off auto-rotation if enabled
stopAnimation();
stopOrientation();
config.roll = 0;
speed.hfov = 0;
// Calculate touch position relative to top left of viewer container
var pos0 = mousePosition(event.targetTouches[0]);
onPointerDownPointerX = pos0.x;
onPointerDownPointerY = pos0.y;
if (event.targetTouches.length == 2) {
// Down pointer is the center of the two fingers
var pos1 = mousePosition(event.targetTouches[1]);
onPointerDownPointerX += (pos1.x - pos0.x) * 0.5;
onPointerDownPointerY += (pos1.y - pos0.y) * 0.5;
onPointerDownPointerDist = Math.sqrt((pos0.x - pos1.x) * (pos0.x - pos1.x) +
(pos0.y - pos1.y) * (pos0.y - pos1.y));
}
isUserInteracting = true;
latestInteraction = Date.now();
onPointerDownYaw = config.yaw;
onPointerDownPitch = config.pitch;
fireEvent('touchstart', event);
animateInit();
}
/**
* Event handler for touch movements. Pans center of view if one touch or
* adjusts zoom if two touches.
* @private
* @param {TouchEvent} event - Document touch move event.
*/
function onDocumentTouchMove(event) {
if (!config.draggable) {
return;
}
// Override default action
event.preventDefault();
if (loaded) {
latestInteraction = Date.now();
}
if (isUserInteracting && loaded) {
var pos0 = mousePosition(event.targetTouches[0]);
var clientX = pos0.x;
var clientY = pos0.y;
if (event.targetTouches.length == 2 && onPointerDownPointerDist != -1) {
var pos1 = mousePosition(event.targetTouches[1]);
clientX += (pos1.x - pos0.x) * 0.5;
clientY += (pos1.y - pos0.y) * 0.5;
var clientDist = Math.sqrt((pos0.x - pos1.x) * (pos0.x - pos1.x) +
(pos0.y - pos1.y) * (pos0.y - pos1.y));
setHfov(config.hfov + (onPointerDownPointerDist - clientDist) * 0.1);
onPointerDownPointerDist = clientDist;
}
// The smaller the config.hfov value (the more zoomed-in the user is), the faster
// yaw/pitch are perceived to change on one-finger touchmove (panning) events and vice versa.
// To improve usability at both small and large zoom levels (config.hfov values)
// we introduce a dynamic pan speed coefficient.
//
// Currently this seems to *roughly* keep initial drag/pan start position close to
// the user's finger while panning regardless of zoom level / config.hfov value.
var touchmovePanSpeedCoeff = (config.hfov / 360) * config.touchPanSpeedCoeffFactor;
var yaw = (onPointerDownPointerX - clientX) * touchmovePanSpeedCoeff + onPointerDownYaw;
speed.yaw = (yaw - config.yaw) % 360 * 0.2;
config.yaw = yaw;
var pitch = (clientY - onPointerDownPointerY) * touchmovePanSpeedCoeff + onPointerDownPitch;
speed.pitch = (pitch - config.pitch) * 0.2;
config.pitch = pitch;
}
}
/**
* Event handler for end of touches. Stops panning and/or zooming.
* @private
*/
function onDocumentTouchEnd() {
isUserInteracting = false;
if (Date.now() - latestInteraction > 150) {
speed.pitch = speed.yaw = 0;
}
onPointerDownPointerDist = -1;
latestInteraction = Date.now();
fireEvent('touchend', event);
}
var pointerIDs = [],
pointerCoordinates = [];
/**
* Event handler for touch starts in IE / Edge.
* @private
* @param {PointerEvent} event - Document pointer down event.
*/
function onDocumentPointerDown(event) {
if (event.pointerType == 'touch') {
pointerIDs.push(event.pointerId);
pointerCoordinates.push({clientX: event.clientX, clientY: event.clientY});
event.targetTouches = pointerCoordinates;
onDocumentTouchStart(event);
event.preventDefault();
}
}
/**
* Event handler for touch moves in IE / Edge.
* @private
* @param {PointerEvent} event - Document pointer move event.
*/
function onDocumentPointerMove(event) {
if (event.pointerType == 'touch') {
for (var i = 0; i < pointerIDs.length; i++) {
if (event.pointerId == pointerIDs[i]) {
pointerCoordinates[i].clientX = event.clientX;
pointerCoordinates[i].clientY = event.clientY;
event.targetTouches = pointerCoordinates;
onDocumentTouchMove(event);
event.preventDefault();
return;
}
}
}
}
/**
* Event handler for touch ends in IE / Edge.
* @private
* @param {PointerEvent} event - Document pointer up event.
*/
function onDocumentPointerUp(event) {
if (event.pointerType == 'touch') {
var defined = false;
for (var i = 0; i < pointerIDs.length; i++) {
if (event.pointerId == pointerIDs[i])
pointerIDs[i] = undefined;
if (pointerIDs[i])
defined = true;
}
if (!defined) {
pointerIDs = [];
pointerCoordinates = [];
onDocumentTouchEnd();
}
event.preventDefault();
}
}
/**
* Event handler for mouse wheel. Changes zoom.
* @private
* @param {WheelEvent} event - Document mouse wheel event.
*/
function onDocumentMouseWheel(event) {
// Only do something if the panorama is loaded and mouse wheel zoom is enabled
if (!loaded || (config.mouseZoom == 'fullscreenonly' && !fullscreenActive)) {
return;
}
event.preventDefault();
// Turn off auto-rotation if enabled
stopAnimation();
latestInteraction = Date.now();