false, no imagery provider will be added.
* @param {TerrainProvider} [options.terrainProvider=new EllipsoidTerrainProvider] The terrain provider.
* @param {SkyBox} [options.skyBox] The skybox used to render the stars. When undefined, the default stars are used. If set to false, no skyBox, Sun, or Moon will be added.
* @param {SkyAtmosphere} [options.skyAtmosphere] Blue sky, and the glow around the Earth's limb. Set to false to turn it off.
* @param {SceneMode} [options.sceneMode=SceneMode.SCENE3D] The initial scene mode.
* @param {Boolean} [options.scene3DOnly=false] When true, each geometry instance will only be rendered in 3D to save GPU memory.
* @param {Boolean} [options.orderIndependentTranslucency=true] If true and the configuration supports it, use order independent translucency.
* @param {MapProjection} [options.mapProjection=new GeographicProjection()] The map projection to use in 2D and Columbus View modes.
* @param {Globe} [options.globe=new Globe(mapProjection.ellipsoid)] The globe to use in the scene. If set to false, no globe will be added.
* @param {Boolean} [options.useDefaultRenderLoop=true] True if this widget should control the render loop, false otherwise.
* @param {Number} [options.targetFrameRate] The target frame rate when using the default render loop.
* @param {Boolean} [options.showRenderLoopErrors=true] If true, this widget will automatically display an HTML panel to the user containing the error, if a render loop error occurs.
* @param {Object} [options.contextOptions] Context and WebGL creation properties corresponding to options passed to {@link Scene}.
* @param {Element|String} [options.creditContainer] The DOM element or ID that will contain the {@link CreditDisplay}. If not specified, the credits are added
* to the bottom of the widget itself.
* @param {Number} [options.terrainExaggeration=1.0] A scalar used to exaggerate the terrain. Note that terrain exaggeration will not modify any other primitive as they are positioned relative to the ellipsoid.
* @param {Boolean} [options.shadows=false] Determines if shadows are cast by the sun.
* @param {ShadowMode} [options.terrainShadows=ShadowMode.RECEIVE_ONLY] Determines if the terrain casts or receives shadows from the sun.
* @param {MapMode2D} [options.mapMode2D=MapMode2D.INFINITE_SCROLL] Determines if the 2D map is rotatable or can be scrolled infinitely in the horizontal direction.
*
* @exception {DeveloperError} Element with id "container" does not exist in the document.
*
* @demo {@link http://cesiumjs.org/Cesium/Apps/Sandcastle/index.html?src=Cesium%20Widget.html|Cesium Sandcastle Cesium Widget Demo}
*
* @example
* // For each example, include a link to CesiumWidget.css stylesheet in HTML head,
* // and in the body, include:
*
* //Widget with no terrain and default Bing Maps imagery provider.
* var widget = new Cesium.CesiumWidget('cesiumContainer');
*
* //Widget with OpenStreetMaps imagery provider and Cesium terrain provider hosted by AGI.
* var widget = new Cesium.CesiumWidget('cesiumContainer', {
* imageryProvider : Cesium.createOpenStreetMapImageryProvider(),
* terrainProvider : new Cesium.CesiumTerrainProvider({
* url : 'https://assets.agi.com/stk-terrain/v1/tilesets/world/tiles'
* }),
* // Use high-res stars downloaded from https://github.com/AnalyticalGraphicsInc/cesium-assets
* skyBox : new Cesium.SkyBox({
* sources : {
* positiveX : 'stars/TychoSkymapII.t3_08192x04096_80_px.jpg',
* negativeX : 'stars/TychoSkymapII.t3_08192x04096_80_mx.jpg',
* positiveY : 'stars/TychoSkymapII.t3_08192x04096_80_py.jpg',
* negativeY : 'stars/TychoSkymapII.t3_08192x04096_80_my.jpg',
* positiveZ : 'stars/TychoSkymapII.t3_08192x04096_80_pz.jpg',
* negativeZ : 'stars/TychoSkymapII.t3_08192x04096_80_mz.jpg'
* }
* }),
* // Show Columbus View map with Web Mercator projection
* sceneMode : Cesium.SceneMode.COLUMBUS_VIEW,
* mapProjection : new Cesium.WebMercatorProjection()
* });
*/
function CesiumWidget(container, options) {
//>>includeStart('debug', pragmas.debug);
if (!defined(container)) {
throw new DeveloperError('container is required.');
}
//>>includeEnd('debug');
container = getElement(container);
options = defaultValue(options, {});
//Configure the widget DOM elements
var element = document.createElement('div');
element.className = 'cesium-widget';
container.appendChild(element);
var canvas = document.createElement('canvas');
var supportsImageRenderingPixelated = FeatureDetection.supportsImageRenderingPixelated();
this._supportsImageRenderingPixelated = supportsImageRenderingPixelated;
if (supportsImageRenderingPixelated) {
canvas.style.imageRendering = FeatureDetection.imageRenderingValue();
}
canvas.oncontextmenu = function() {
return false;
};
canvas.onselectstart = function() {
return false;
};
element.appendChild(canvas);
var creditContainer = document.createElement('div');
creditContainer.className = 'cesium-widget-credits';
var creditContainerContainer = defined(options.creditContainer) ? getElement(options.creditContainer) : element;
creditContainerContainer.appendChild(creditContainer);
var showRenderLoopErrors = defaultValue(options.showRenderLoopErrors, true);
this._element = element;
this._container = container;
this._canvas = canvas;
this._canvasWidth = 0;
this._canvasHeight = 0;
this._creditContainerContainer = creditContainerContainer;
this._creditContainer = creditContainer;
this._canRender = false;
this._renderLoopRunning = false;
this._showRenderLoopErrors = showRenderLoopErrors;
this._resolutionScale = 1.0;
this._forceResize = false;
this._clock = defined(options.clock) ? options.clock : new Clock();
configureCanvasSize(this);
try {
var scene = new Scene({
canvas : canvas,
contextOptions : options.contextOptions,
creditContainer : creditContainer,
mapProjection : options.mapProjection,
orderIndependentTranslucency : options.orderIndependentTranslucency,
scene3DOnly : defaultValue(options.scene3DOnly, false),
terrainExaggeration : options.terrainExaggeration,
shadows : options.shadows,
mapMode2D : options.mapMode2D
});
this._scene = scene;
scene.camera.constrainedAxis = Cartesian3.UNIT_Z;
configureCameraFrustum(this);
var ellipsoid = defaultValue(scene.mapProjection.ellipsoid, Ellipsoid.WGS84);
var creditDisplay = scene.frameState.creditDisplay;
var cesiumCredit = new Credit({
text: 'Cesium',
imageUrl: cesiumLogoData,
link: 'http://cesiumjs.org/',
showOnScreen: true
});
creditDisplay.addDefaultCredit(cesiumCredit);
var globe = options.globe;
if (!defined(globe)) {
globe = new Globe(ellipsoid);
}
if (globe !== false) {
scene.globe = globe;
scene.globe.shadows = defaultValue(options.terrainShadows, ShadowMode.RECEIVE_ONLY);
}
var skyBox = options.skyBox;
if (!defined(skyBox)) {
skyBox = new SkyBox({
sources : {
positiveX : getDefaultSkyBoxUrl('px'),
negativeX : getDefaultSkyBoxUrl('mx'),
positiveY : getDefaultSkyBoxUrl('py'),
negativeY : getDefaultSkyBoxUrl('my'),
positiveZ : getDefaultSkyBoxUrl('pz'),
negativeZ : getDefaultSkyBoxUrl('mz')
}
});
}
if (skyBox !== false) {
scene.skyBox = skyBox;
scene.sun = new Sun();
scene.moon = new Moon();
}
// Blue sky, and the glow around the Earth's limb.
var skyAtmosphere = options.skyAtmosphere;
if (!defined(skyAtmosphere)) {
skyAtmosphere = new SkyAtmosphere(ellipsoid);
}
if (skyAtmosphere !== false) {
scene.skyAtmosphere = skyAtmosphere;
}
//Set the base imagery layer
var imageryProvider = (options.globe === false) ? false : options.imageryProvider;
if (!defined(imageryProvider)) {
imageryProvider = new BingMapsImageryProvider({
url : 'https://dev.virtualearth.net'
});
}
if (imageryProvider !== false) {
scene.imageryLayers.addImageryProvider(imageryProvider);
}
//Set the terrain provider if one is provided.
if (defined(options.terrainProvider) && options.globe !== false) {
scene.terrainProvider = options.terrainProvider;
}
this._screenSpaceEventHandler = new ScreenSpaceEventHandler(canvas, false);
if (defined(options.sceneMode)) {
if (options.sceneMode === SceneMode.SCENE2D) {
this._scene.morphTo2D(0);
}
if (options.sceneMode === SceneMode.COLUMBUS_VIEW) {
this._scene.morphToColumbusView(0);
}
}
this._useDefaultRenderLoop = undefined;
this.useDefaultRenderLoop = defaultValue(options.useDefaultRenderLoop, true);
this._targetFrameRate = undefined;
this.targetFrameRate = options.targetFrameRate;
var that = this;
scene.renderError.addEventListener(function(scene, error) {
that._useDefaultRenderLoop = false;
that._renderLoopRunning = false;
if (that._showRenderLoopErrors) {
var title = 'An error occurred while rendering. Rendering has stopped.';
that.showErrorPanel(title, undefined, error);
}
});
} catch (error) {
if (showRenderLoopErrors) {
var title = 'Error constructing CesiumWidget.';
var message = 'Visit http://get.webgl.org to verify that your web browser and hardware support WebGL. Consider trying a different web browser or updating your video drivers. Detailed error information is below:';
this.showErrorPanel(title, message, error);
}
throw error;
}
}
defineProperties(CesiumWidget.prototype, {
/**
* Gets the parent container.
* @memberof CesiumWidget.prototype
*
* @type {Element}
*/
container : {
get : function() {
return this._container;
}
},
/**
* Gets the canvas.
* @memberof CesiumWidget.prototype
*
* @type {Canvas}
*/
canvas : {
get : function() {
return this._canvas;
}
},
/**
* Gets the credit container.
* @memberof CesiumWidget.prototype
*
* @type {Element}
*/
creditContainer: {
get : function() {
return this._creditContainer;
}
},
/**
* Gets the scene.
* @memberof CesiumWidget.prototype
*
* @type {Scene}
*/
scene : {
get : function() {
return this._scene;
}
},
/**
* Gets the collection of image layers that will be rendered on the globe.
* @memberof CesiumWidget.prototype
*
* @type {ImageryLayerCollection}
* @readonly
*/
imageryLayers : {
get : function() {
return this._scene.imageryLayers;
}
},
/**
* The terrain provider providing surface geometry for the globe.
* @memberof CesiumWidget.prototype
*
* @type {TerrainProvider}
*/
terrainProvider : {
get : function() {
return this._scene.terrainProvider;
},
set : function(terrainProvider) {
this._scene.terrainProvider = terrainProvider;
}
},
/**
* Gets the camera.
* @memberof CesiumWidget.prototype
*
* @type {Camera}
* @readonly
*/
camera : {
get : function() {
return this._scene.camera;
}
},
/**
* Gets the clock.
* @memberof CesiumWidget.prototype
*
* @type {Clock}
*/
clock : {
get : function() {
return this._clock;
}
},
/**
* Gets the screen space event handler.
* @memberof CesiumWidget.prototype
*
* @type {ScreenSpaceEventHandler}
*/
screenSpaceEventHandler : {
get : function() {
return this._screenSpaceEventHandler;
}
},
/**
* Gets or sets the target frame rate of the widget when useDefaultRenderLoop
* is true. If undefined, the browser's {@link requestAnimationFrame} implementation
* determines the frame rate. If defined, this value must be greater than 0. A value higher
* than the underlying requestAnimationFrame implementation will have no effect.
* @memberof CesiumWidget.prototype
*
* @type {Number}
*/
targetFrameRate : {
get : function() {
return this._targetFrameRate;
},
set : function(value) {
//>>includeStart('debug', pragmas.debug);
if (value <= 0) {
throw new DeveloperError('targetFrameRate must be greater than 0, or undefined.');
}
//>>includeEnd('debug');
this._targetFrameRate = value;
}
},
/**
* Gets or sets whether or not this widget should control the render loop.
* If set to true the widget will use {@link requestAnimationFrame} to
* perform rendering and resizing of the widget, as well as drive the
* simulation clock. If set to false, you must manually call the
* resize, render methods as part of a custom
* render loop. If an error occurs during rendering, {@link Scene}'s
* renderError event will be raised and this property
* will be set to false. It must be set back to true to continue rendering
* after the error.
* @memberof CesiumWidget.prototype
*
* @type {Boolean}
*/
useDefaultRenderLoop : {
get : function() {
return this._useDefaultRenderLoop;
},
set : function(value) {
if (this._useDefaultRenderLoop !== value) {
this._useDefaultRenderLoop = value;
if (value && !this._renderLoopRunning) {
startRenderLoop(this);
}
}
}
},
/**
* Gets or sets a scaling factor for rendering resolution. Values less than 1.0 can improve
* performance on less powerful devices while values greater than 1.0 will render at a higher
* resolution and then scale down, resulting in improved visual fidelity.
* For example, if the widget is laid out at a size of 640x480, setting this value to 0.5
* will cause the scene to be rendered at 320x240 and then scaled up while setting
* it to 2.0 will cause the scene to be rendered at 1280x960 and then scaled down.
* @memberof CesiumWidget.prototype
*
* @type {Number}
* @default 1.0
*/
resolutionScale : {
get : function() {
return this._resolutionScale;
},
set : function(value) {
//>>includeStart('debug', pragmas.debug);
if (value <= 0) {
throw new DeveloperError('resolutionScale must be greater than 0.');
}
//>>includeEnd('debug');
this._resolutionScale = value;
this._forceResize = true;
}
}
});
/**
* Show an error panel to the user containing a title and a longer error message,
* which can be dismissed using an OK button. This panel is displayed automatically
* when a render loop error occurs, if showRenderLoopErrors was not false when the
* widget was constructed.
*
* @param {String} title The title to be displayed on the error panel. This string is interpreted as text.
* @param {String} message A helpful, user-facing message to display prior to the detailed error information. This string is interpreted as HTML.
* @param {String} [error] The error to be displayed on the error panel. This string is formatted using {@link formatError} and then displayed as text.
*/
CesiumWidget.prototype.showErrorPanel = function(title, message, error) {
var element = this._element;
var overlay = document.createElement('div');
overlay.className = 'cesium-widget-errorPanel';
var content = document.createElement('div');
content.className = 'cesium-widget-errorPanel-content';
overlay.appendChild(content);
var errorHeader = document.createElement('div');
errorHeader.className = 'cesium-widget-errorPanel-header';
errorHeader.appendChild(document.createTextNode(title));
content.appendChild(errorHeader);
var errorPanelScroller = document.createElement('div');
errorPanelScroller.className = 'cesium-widget-errorPanel-scroll';
content.appendChild(errorPanelScroller);
function resizeCallback() {
errorPanelScroller.style.maxHeight = Math.max(Math.round(element.clientHeight * 0.9 - 100), 30) + 'px';
}
resizeCallback();
if (defined(window.addEventListener)) {
window.addEventListener('resize', resizeCallback, false);
}
if (defined(message)) {
var errorMessage = document.createElement('div');
errorMessage.className = 'cesium-widget-errorPanel-message';
errorMessage.innerHTML = '' + message + '
'; errorPanelScroller.appendChild(errorMessage); } var errorDetails = '(no error details available)'; if (defined(error)) { errorDetails = formatError(error); } var errorMessageDetails = document.createElement('div'); errorMessageDetails.className = 'cesium-widget-errorPanel-message'; errorMessageDetails.appendChild(document.createTextNode(errorDetails)); errorPanelScroller.appendChild(errorMessageDetails); var buttonPanel = document.createElement('div'); buttonPanel.className = 'cesium-widget-errorPanel-buttonPanel'; content.appendChild(buttonPanel); var okButton = document.createElement('button'); okButton.setAttribute('type', 'button'); okButton.className = 'cesium-button'; okButton.appendChild(document.createTextNode('OK')); okButton.onclick = function() { if (defined(resizeCallback) && defined(window.removeEventListener)) { window.removeEventListener('resize', resizeCallback, false); } element.removeChild(overlay); }; buttonPanel.appendChild(okButton); element.appendChild(overlay); //IE8 does not have a console object unless the dev tools are open. if (typeof console !== 'undefined') { console.error(title + '\n' + message + '\n' + errorDetails); } }; /** * @returns {Boolean} true if the object has been destroyed, false otherwise. */ CesiumWidget.prototype.isDestroyed = function() { return false; }; /** * Destroys the widget. Should be called if permanently * removing the widget from layout. */ CesiumWidget.prototype.destroy = function() { this._scene = this._scene && this._scene.destroy(); this._container.removeChild(this._element); this._creditContainerContainer.removeChild(this._creditContainer); destroyObject(this); }; /** * Updates the canvas size, camera aspect ratio, and viewport size. * This function is called automatically as needed unless *useDefaultRenderLoop is set to false.
*/
CesiumWidget.prototype.resize = function() {
var canvas = this._canvas;
var width = canvas.clientWidth;
var height = canvas.clientHeight;
if (!this._forceResize && this._canvasWidth === width && this._canvasHeight === height) {
return;
}
this._forceResize = false;
configureCanvasSize(this);
configureCameraFrustum(this);
};
/**
* Renders the scene. This function is called automatically
* unless useDefaultRenderLoop is set to false;
*/
CesiumWidget.prototype.render = function() {
if (this._canRender) {
this._scene.initializeFrame();
var currentTime = this._clock.tick();
this._scene.render(currentTime);
} else {
this._clock.tick();
}
};
return CesiumWidget;
});