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import BoundingSphere from "../Core/BoundingSphere.js";
import Check from "../Core/Check.js";
import defined from "../Core/defined.js";
import destroyObject from "../Core/destroyObject.js";
import EventHelper from "../Core/EventHelper.js";
import GroundPolylinePrimitive from "../Scene/GroundPolylinePrimitive.js";
import GroundPrimitive from "../Scene/GroundPrimitive.js";
import OrderedGroundPrimitiveCollection from "../Scene/OrderedGroundPrimitiveCollection.js";
import PrimitiveCollection from "../Scene/PrimitiveCollection.js";
import BillboardVisualizer from "./BillboardVisualizer.js";
import BoundingSphereState from "./BoundingSphereState.js";
import CustomDataSource from "./CustomDataSource.js";
import GeometryVisualizer from "./GeometryVisualizer.js";
import LabelVisualizer from "./LabelVisualizer.js";
import ModelVisualizer from "./ModelVisualizer.js";
import Cesium3DTilesetVisualizer from "./Cesium3DTilesetVisualizer.js";
import PathVisualizer from "./PathVisualizer.js";
import PointVisualizer from "./PointVisualizer.js";
import PolylineVisualizer from "./PolylineVisualizer.js";
/**
* Visualizes a collection of {@link DataSource} instances.
* @alias DataSourceDisplay
* @constructor
*
* @param {object} options Object with the following properties:
* @param {Scene} options.scene The scene in which to display the data.
* @param {DataSourceCollection} options.dataSourceCollection The data sources to display.
* @param {DataSourceDisplay.VisualizersCallback} [options.visualizersCallback=DataSourceDisplay.defaultVisualizersCallback]
* A function which creates an array of visualizers used for visualization.
* If undefined, all standard visualizers are used.
*/
function DataSourceDisplay(options) {
//>>includeStart('debug', pragmas.debug);
Check.typeOf.object("options", options);
Check.typeOf.object("options.scene", options.scene);
Check.typeOf.object(
"options.dataSourceCollection",
options.dataSourceCollection,
);
//>>includeEnd('debug');
GroundPrimitive.initializeTerrainHeights();
GroundPolylinePrimitive.initializeTerrainHeights();
const scene = options.scene;
const dataSourceCollection = options.dataSourceCollection;
this._eventHelper = new EventHelper();
this._eventHelper.add(
dataSourceCollection.dataSourceAdded,
this._onDataSourceAdded,
this,
);
this._eventHelper.add(
dataSourceCollection.dataSourceRemoved,
this._onDataSourceRemoved,
this,
);
this._eventHelper.add(
dataSourceCollection.dataSourceMoved,
this._onDataSourceMoved,
this,
);
this._eventHelper.add(scene.postRender, this._postRender, this);
this._dataSourceCollection = dataSourceCollection;
this._scene = scene;
this._visualizersCallback =
options.visualizersCallback ?? DataSourceDisplay.defaultVisualizersCallback;
let primitivesAdded = false;
const primitives = new PrimitiveCollection();
const groundPrimitives = new PrimitiveCollection();
if (dataSourceCollection.length > 0) {
scene.primitives.add(primitives);
scene.groundPrimitives.add(groundPrimitives);
primitivesAdded = true;
}
this._primitives = primitives;
this._groundPrimitives = groundPrimitives;
for (let i = 0, len = dataSourceCollection.length; i < len; i++) {
this._onDataSourceAdded(dataSourceCollection, dataSourceCollection.get(i));
}
const defaultDataSource = new CustomDataSource();
this._onDataSourceAdded(undefined, defaultDataSource);
this._defaultDataSource = defaultDataSource;
let removeDefaultDataSourceListener;
let removeDataSourceCollectionListener;
if (!primitivesAdded) {
const that = this;
const addPrimitives = function () {
scene.primitives.add(primitives);
scene.groundPrimitives.add(groundPrimitives);
removeDefaultDataSourceListener();
removeDataSourceCollectionListener();
that._removeDefaultDataSourceListener = undefined;
that._removeDataSourceCollectionListener = undefined;
};
removeDefaultDataSourceListener =
defaultDataSource.entities.collectionChanged.addEventListener(
addPrimitives,
);
removeDataSourceCollectionListener =
dataSourceCollection.dataSourceAdded.addEventListener(addPrimitives);
}
this._removeDefaultDataSourceListener = removeDefaultDataSourceListener;
this._removeDataSourceCollectionListener = removeDataSourceCollectionListener;
this._ready = false;
}
const ExtraVisualizers = [];
/**
* Add the provided Visualizer to the default visualizers callback if not already included
* @private
* @param {Visualizer} visualizer Visualizer class to add
*/
DataSourceDisplay.registerVisualizer = function (visualizer) {
Eif (!ExtraVisualizers.includes(visualizer)) {
ExtraVisualizers.push(visualizer);
}
};
/**
* Remove the provided Visualizer from the default visualizers callback if it's already included
* @private
* @param {Visualizer} visualizer Visualizer class to remove
*/
DataSourceDisplay.unregisterVisualizer = function (visualizer) {
Eif (ExtraVisualizers.includes(visualizer)) {
const index = ExtraVisualizers.indexOf(visualizer);
ExtraVisualizers.splice(index, 1);
}
};
/**
* Gets or sets the default function which creates an array of visualizers used for visualization.
* By default, this function uses all standard visualizers.
*
* @type {DataSourceDisplay.VisualizersCallback}
*/
DataSourceDisplay.defaultVisualizersCallback = function (
scene,
entityCluster,
dataSource,
) {
const entities = dataSource.entities;
return [
new BillboardVisualizer(entityCluster, entities),
new GeometryVisualizer(
scene,
entities,
dataSource._primitives,
dataSource._groundPrimitives,
),
new LabelVisualizer(entityCluster, entities),
new ModelVisualizer(scene, entities),
new Cesium3DTilesetVisualizer(scene, entities),
new PointVisualizer(entityCluster, entities),
new PathVisualizer(scene, entities),
new PolylineVisualizer(
scene,
entities,
dataSource._primitives,
dataSource._groundPrimitives,
),
...ExtraVisualizers.map(
(VisualizerClass) => new VisualizerClass(scene, entities),
),
];
};
Object.defineProperties(DataSourceDisplay.prototype, {
/**
* Gets the scene associated with this display.
* @memberof DataSourceDisplay.prototype
* @type {Scene}
*/
scene: {
get: function () {
return this._scene;
},
},
/**
* Gets the collection of data sources to display.
* @memberof DataSourceDisplay.prototype
* @type {DataSourceCollection}
*/
dataSources: {
get: function () {
return this._dataSourceCollection;
},
},
/**
* Gets the default data source instance which can be used to
* manually create and visualize entities not tied to
* a specific data source. This instance is always available
* and does not appear in the list dataSources collection.
* @memberof DataSourceDisplay.prototype
* @type {CustomDataSource}
*/
defaultDataSource: {
get: function () {
return this._defaultDataSource;
},
},
/**
* Gets a value indicating whether or not all entities in the data source are ready
* @memberof DataSourceDisplay.prototype
* @type {boolean}
* @readonly
*/
ready: {
get: function () {
return this._ready;
},
},
});
/**
* Returns true if this object was destroyed; otherwise, false.
* <br /><br />
* If this object was destroyed, it should not be used; calling any function other than
* <code>isDestroyed</code> will result in a {@link DeveloperError} exception.
*
* @returns {boolean} True if this object was destroyed; otherwise, false.
*
* @see DataSourceDisplay#destroy
*/
DataSourceDisplay.prototype.isDestroyed = function () {
return false;
};
/**
* Destroys the WebGL resources held by this object. Destroying an object allows for deterministic
* release of WebGL resources, instead of relying on the garbage collector to destroy this object.
* <br /><br />
* Once an object is destroyed, it should not be used; calling any function other than
* <code>isDestroyed</code> will result in a {@link DeveloperError} exception. Therefore,
* assign the return value (<code>undefined</code>) to the object as done in the example.
*
* @exception {DeveloperError} This object was destroyed, i.e., destroy() was called.
*
*
* @example
* dataSourceDisplay = dataSourceDisplay.destroy();
*
* @see DataSourceDisplay#isDestroyed
*/
DataSourceDisplay.prototype.destroy = function () {
this._eventHelper.removeAll();
const dataSourceCollection = this._dataSourceCollection;
for (let i = 0, length = dataSourceCollection.length; i < length; ++i) {
this._onDataSourceRemoved(
this._dataSourceCollection,
dataSourceCollection.get(i),
);
}
this._onDataSourceRemoved(undefined, this._defaultDataSource);
if (defined(this._removeDefaultDataSourceListener)) {
this._removeDefaultDataSourceListener();
this._removeDataSourceCollectionListener();
} else {
this._scene.primitives.remove(this._primitives);
this._scene.groundPrimitives.remove(this._groundPrimitives);
}
return destroyObject(this);
};
/**
* Updates the display to the provided time.
*
* @param {JulianDate} time The simulation time.
* @returns {boolean} True if all data sources are ready to be displayed, false otherwise.
*/
DataSourceDisplay.prototype.update = function (time) {
//>>includeStart('debug', pragmas.debug);
Check.defined("time", time);
//>>includeEnd('debug');
if (!ApproximateTerrainHeights.initialized) {
this._ready = false;
return false;
}
let result = true;
let i;
let x;
let visualizers;
let vLength;
const dataSources = this._dataSourceCollection;
const length = dataSources.length;
for (i = 0; i < length; i++) {
const dataSource = dataSources.get(i);
Eif (defined(dataSource.update)) {
result = dataSource.update(time) && result;
}
visualizers = dataSource._visualizers;
vLength = visualizers.length;
for (x = 0; x < vLength; x++) {
result = visualizers[x].update(time) && result;
}
}
visualizers = this._defaultDataSource._visualizers;
vLength = visualizers.length;
for (x = 0; x < vLength; x++) {
result = visualizers[x].update(time) && result;
}
// Request a rendering of the scene when the data source
// becomes 'ready' for the first time
if (!this._ready && result) {
this._scene.requestRender();
}
// once the DataSourceDisplay is ready it should stay ready to prevent
// entities from breaking updates when they become "un-ready"
this._ready = this._ready || result;
return result;
};
DataSourceDisplay.prototype._postRender = function () {
// Adds credits for all datasources
const frameState = this._scene.frameState;
const dataSources = this._dataSourceCollection;
const length = dataSources.length;
for (let i = 0; i < length; i++) {
const dataSource = dataSources.get(i);
const credit = dataSource.credit;
Iif (defined(credit)) {
frameState.creditDisplay.addCreditToNextFrame(credit);
}
// Credits from the resource that the user can't remove
const credits = dataSource._resourceCredits;
Iif (defined(credits)) {
const creditCount = credits.length;
for (let c = 0; c < creditCount; c++) {
frameState.creditDisplay.addCreditToNextFrame(credits[c]);
}
}
}
};
const getBoundingSphereArrayScratch = [];
const getBoundingSphereBoundingSphereScratch = new BoundingSphere();
/**
* Computes a bounding sphere which encloses the visualization produced for the specified entity.
* The bounding sphere is in the fixed frame of the scene's globe.
*
* @param {Entity} entity The entity whose bounding sphere to compute.
* @param {boolean} allowPartial If true, pending bounding spheres are ignored and an answer will be returned from the currently available data.
* If false, the the function will halt and return pending if any of the bounding spheres are pending.
* @param {BoundingSphere} result The bounding sphere onto which to store the result.
* @returns {BoundingSphereState} BoundingSphereState.DONE if the result contains the bounding sphere,
* BoundingSphereState.PENDING if the result is still being computed, or
* BoundingSphereState.FAILED if the entity has no visualization in the current scene.
* @private
*/
DataSourceDisplay.prototype.getBoundingSphere = function (
entity,
allowPartial,
result,
) {
//>>includeStart('debug', pragmas.debug);
Check.defined("entity", entity);
Check.typeOf.bool("allowPartial", allowPartial);
Check.defined("result", result);
//>>includeEnd('debug');
if (!this._ready) {
return BoundingSphereState.PENDING;
}
let i;
let length;
let dataSource = this._defaultDataSource;
if (!dataSource.entities.contains(entity)) {
dataSource = undefined;
const dataSources = this._dataSourceCollection;
length = dataSources.length;
for (i = 0; i < length; i++) {
const d = dataSources.get(i);
Eif (d.entities.contains(entity)) {
dataSource = d;
break;
}
}
}
if (!defined(dataSource)) {
return BoundingSphereState.FAILED;
}
const boundingSpheres = getBoundingSphereArrayScratch;
const tmp = getBoundingSphereBoundingSphereScratch;
let count = 0;
let state = BoundingSphereState.DONE;
const visualizers = dataSource._visualizers;
const visualizersLength = visualizers.length;
for (i = 0; i < visualizersLength; i++) {
const visualizer = visualizers[i];
if (defined(visualizer.getBoundingSphere)) {
state = visualizers[i].getBoundingSphere(entity, tmp);
if (!allowPartial && state === BoundingSphereState.PENDING) {
return BoundingSphereState.PENDING;
} else if (state === BoundingSphereState.DONE) {
boundingSpheres[count] = BoundingSphere.clone(
tmp,
boundingSpheres[count],
);
count++;
}
}
}
if (count === 0) {
return BoundingSphereState.FAILED;
}
boundingSpheres.length = count;
BoundingSphere.fromBoundingSpheres(boundingSpheres, result);
return BoundingSphereState.DONE;
};
DataSourceDisplay.prototype._onDataSourceAdded = function (
dataSourceCollection,
dataSource,
) {
const scene = this._scene;
const displayPrimitives = this._primitives;
const displayGroundPrimitives = this._groundPrimitives;
const primitives = displayPrimitives.add(new PrimitiveCollection());
const groundPrimitives = displayGroundPrimitives.add(
new OrderedGroundPrimitiveCollection(),
);
dataSource._primitives = primitives;
dataSource._groundPrimitives = groundPrimitives;
const entityCluster = dataSource.clustering;
entityCluster._initialize(scene);
primitives.add(entityCluster);
dataSource._visualizers = this._visualizersCallback(
scene,
entityCluster,
dataSource,
);
};
DataSourceDisplay.prototype._onDataSourceRemoved = function (
dataSourceCollection,
dataSource,
) {
const displayPrimitives = this._primitives;
const displayGroundPrimitives = this._groundPrimitives;
const primitives = dataSource._primitives;
const groundPrimitives = dataSource._groundPrimitives;
const entityCluster = dataSource.clustering;
primitives.remove(entityCluster);
const visualizers = dataSource._visualizers;
const length = visualizers.length;
for (let i = 0; i < length; i++) {
visualizers[i].destroy();
}
displayPrimitives.remove(primitives);
displayGroundPrimitives.remove(groundPrimitives);
dataSource._visualizers = undefined;
};
DataSourceDisplay.prototype._onDataSourceMoved = function (
dataSource,
newIndex,
oldIndex,
) {
const displayPrimitives = this._primitives;
const displayGroundPrimitives = this._groundPrimitives;
const primitives = dataSource._primitives;
const groundPrimitives = dataSource._groundPrimitives;
if (newIndex === oldIndex + 1) {
displayPrimitives.raise(primitives);
displayGroundPrimitives.raise(groundPrimitives);
} else if (newIndex === oldIndex - 1) {
displayPrimitives.lower(primitives);
displayGroundPrimitives.lower(groundPrimitives);
} else if (newIndex === 0) {
displayPrimitives.lowerToBottom(primitives);
displayGroundPrimitives.lowerToBottom(groundPrimitives);
displayPrimitives.raise(primitives); // keep defaultDataSource primitives at index 0 since it's not in the collection
displayGroundPrimitives.raise(groundPrimitives);
} else {
displayPrimitives.raiseToTop(primitives);
displayGroundPrimitives.raiseToTop(groundPrimitives);
}
};
/**
* A function which creates an array of visualizers used for visualization.
* @callback DataSourceDisplay.VisualizersCallback
*
* @param {Scene} scene The scene to create visualizers for.
* @param {EntityCluster} entityCluster The entity cluster to create visualizers for.
* @param {DataSource} dataSource The data source to create visualizers for.
* @returns {Visualizer[]} An array of visualizers used for visualization.
*
* @example
* function createVisualizers(scene, entityCluster, dataSource) {
* return [new Cesium.BillboardVisualizer(entityCluster, dataSource.entities)];
* }
*/
export default DataSourceDisplay;
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