Add existing to tracked

node_modules/@cesium/engine/Source/DataSources/CompositePositionProperty.js

@@ -0,0 +1,153 @@
+import defined from "../Core/defined.js";
+import DeveloperError from "../Core/DeveloperError.js";
+import Event from "../Core/Event.js";
+import JulianDate from "../Core/JulianDate.js";
+import ReferenceFrame from "../Core/ReferenceFrame.js";
+import CompositeProperty from "./CompositeProperty.js";
+import Property from "./Property.js";
+
+/**
+ * A {@link CompositeProperty} which is also a {@link PositionProperty}.
+ *
+ * @alias CompositePositionProperty
+ * @constructor
+ *
+ * @param {ReferenceFrame} [referenceFrame=ReferenceFrame.FIXED] The reference frame in which the position is defined.
+ */
+function CompositePositionProperty(referenceFrame) {
+  this._referenceFrame = referenceFrame ?? ReferenceFrame.FIXED;
+  this._definitionChanged = new Event();
+  this._composite = new CompositeProperty();
+  this._composite.definitionChanged.addEventListener(
+    CompositePositionProperty.prototype._raiseDefinitionChanged,
+    this,
+  );
+}
+
+Object.defineProperties(CompositePositionProperty.prototype, {
+  /**
+   * Gets a value indicating if this property is constant.  A property is considered
+   * constant if getValue always returns the same result for the current definition.
+   * @memberof CompositePositionProperty.prototype
+   *
+   * @type {boolean}
+   * @readonly
+   */
+  isConstant: {
+    get: function () {
+      return this._composite.isConstant;
+    },
+  },
+  /**
+   * Gets the event that is raised whenever the definition of this property changes.
+   * The definition is changed whenever setValue is called with data different
+   * than the current value.
+   * @memberof CompositePositionProperty.prototype
+   *
+   * @type {Event}
+   * @readonly
+   */
+  definitionChanged: {
+    get: function () {
+      return this._definitionChanged;
+    },
+  },
+  /**
+   * Gets the interval collection.
+   * @memberof CompositePositionProperty.prototype
+   *
+   * @type {TimeIntervalCollection}
+   */
+  intervals: {
+    get: function () {
+      return this._composite.intervals;
+    },
+  },
+  /**
+   * Gets or sets the reference frame which this position presents itself as.
+   * Each PositionProperty making up this object has it's own reference frame,
+   * so this property merely exposes a "preferred" reference frame for clients
+   * to use.
+   * @memberof CompositePositionProperty.prototype
+   *
+   * @type {ReferenceFrame}
+   */
+  referenceFrame: {
+    get: function () {
+      return this._referenceFrame;
+    },
+    set: function (value) {
+      this._referenceFrame = value;
+    },
+  },
+});
+
+const timeScratch = new JulianDate();
+
+/**
+ * Gets the value of the property at the provided time in the fixed frame.
+ *
+ * @param {JulianDate} [time=JulianDate.now()] The time for which to retrieve the value. If omitted, the current system time is used.
+ * @param {Cartesian3} [result] The object to store the value into, if omitted, a new instance is created and returned.
+ * @returns {Cartesian3 | undefined} The modified result parameter or a new instance if the result parameter was not supplied.
+ */
+CompositePositionProperty.prototype.getValue = function (time, result) {
+  if (!defined(time)) {
+    time = JulianDate.now(timeScratch);
+  }
+  return this.getValueInReferenceFrame(time, ReferenceFrame.FIXED, result);
+};
+
+/**
+ * Gets the value of the property at the provided time and in the provided reference frame.
+ *
+ * @param {JulianDate} time The time for which to retrieve the value.
+ * @param {ReferenceFrame} referenceFrame The desired referenceFrame of the result.
+ * @param {Cartesian3} [result] The object to store the value into, if omitted, a new instance is created and returned.
+ * @returns {Cartesian3 | undefined} The modified result parameter or a new instance if the result parameter was not supplied.
+ */
+CompositePositionProperty.prototype.getValueInReferenceFrame = function (
+  time,
+  referenceFrame,
+  result,
+) {
+  //>>includeStart('debug', pragmas.debug);
+  if (!defined(time)) {
+    throw new DeveloperError("time is required.");
+  }
+  if (!defined(referenceFrame)) {
+    throw new DeveloperError("referenceFrame is required.");
+  }
+  //>>includeEnd('debug');
+
+  const innerProperty =
+    this._composite._intervals.findDataForIntervalContainingDate(time);
+  if (defined(innerProperty)) {
+    return innerProperty.getValueInReferenceFrame(time, referenceFrame, result);
+  }
+  return undefined;
+};
+
+/**
+ * Compares this property to the provided property and returns
+ * <code>true</code> if they are equal, <code>false</code> otherwise.
+ *
+ * @param {Property} [other] The other property.
+ * @returns {boolean} <code>true</code> if left and right are equal, <code>false</code> otherwise.
+ */
+CompositePositionProperty.prototype.equals = function (other) {
+  return (
+    this === other || //
+    (other instanceof CompositePositionProperty && //
+      this._referenceFrame === other._referenceFrame && //
+      this._composite.equals(other._composite, Property.equals))
+  );
+};
+
+/**
+ * @private
+ */
+CompositePositionProperty.prototype._raiseDefinitionChanged = function () {
+  this._definitionChanged.raiseEvent(this);
+};
+export default CompositePositionProperty;