import defaultValue from "../Core/defaultValue.js";
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import defined from "../Core/defined.js";
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import DeveloperError from "../Core/DeveloperError.js";
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import Event from "../Core/Event.js";
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import ReferenceFrame from "../Core/ReferenceFrame.js";
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import TimeIntervalCollection from "../Core/TimeIntervalCollection.js";
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import PositionProperty from "./PositionProperty.js";
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import Property from "./Property.js";
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/**
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* A {@link TimeIntervalCollectionProperty} which is also a {@link PositionProperty}.
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*
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* @alias TimeIntervalCollectionPositionProperty
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* @constructor
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*
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* @param {ReferenceFrame} [referenceFrame=ReferenceFrame.FIXED] The reference frame in which the position is defined.
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*/
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function TimeIntervalCollectionPositionProperty(referenceFrame) {
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this._definitionChanged = new Event();
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this._intervals = new TimeIntervalCollection();
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this._intervals.changedEvent.addEventListener(
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TimeIntervalCollectionPositionProperty.prototype._intervalsChanged,
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this
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);
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this._referenceFrame = defaultValue(referenceFrame, ReferenceFrame.FIXED);
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}
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Object.defineProperties(TimeIntervalCollectionPositionProperty.prototype, {
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/**
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* Gets a value indicating if this property is constant. A property is considered
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* constant if getValue always returns the same result for the current definition.
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* @memberof TimeIntervalCollectionPositionProperty.prototype
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*
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* @type {Boolean}
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* @readonly
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*/
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isConstant: {
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get: function () {
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return this._intervals.isEmpty;
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},
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},
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/**
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* Gets the event that is raised whenever the definition of this property changes.
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* The definition is considered to have changed if a call to getValue would return
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* a different result for the same time.
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* @memberof TimeIntervalCollectionPositionProperty.prototype
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*
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* @type {Event}
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* @readonly
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*/
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definitionChanged: {
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get: function () {
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return this._definitionChanged;
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},
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},
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/**
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* Gets the interval collection.
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* @memberof TimeIntervalCollectionPositionProperty.prototype
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* @type {TimeIntervalCollection}
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*/
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intervals: {
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get: function () {
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return this._intervals;
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},
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},
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/**
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* Gets the reference frame in which the position is defined.
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* @memberof TimeIntervalCollectionPositionProperty.prototype
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* @type {ReferenceFrame}
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* @default ReferenceFrame.FIXED;
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*/
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referenceFrame: {
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get: function () {
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return this._referenceFrame;
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},
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},
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});
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/**
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* Gets the value of the property at the provided time in the fixed frame.
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*
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* @param {JulianDate} time The time for which to retrieve the value.
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* @param {Object} [result] The object to store the value into, if omitted, a new instance is created and returned.
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* @returns {Object} The modified result parameter or a new instance if the result parameter was not supplied.
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*/
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TimeIntervalCollectionPositionProperty.prototype.getValue = function (
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time,
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result
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) {
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return this.getValueInReferenceFrame(time, ReferenceFrame.FIXED, result);
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};
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/**
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* Gets the value of the property at the provided time and in the provided reference frame.
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*
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* @param {JulianDate} time The time for which to retrieve the value.
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* @param {ReferenceFrame} referenceFrame The desired referenceFrame of the result.
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* @param {Cartesian3} [result] The object to store the value into, if omitted, a new instance is created and returned.
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* @returns {Cartesian3} The modified result parameter or a new instance if the result parameter was not supplied.
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*/
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TimeIntervalCollectionPositionProperty.prototype.getValueInReferenceFrame = function (
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time,
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referenceFrame,
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result
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) {
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//>>includeStart('debug', pragmas.debug);
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if (!defined(time)) {
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throw new DeveloperError("time is required.");
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}
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if (!defined(referenceFrame)) {
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throw new DeveloperError("referenceFrame is required.");
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}
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//>>includeEnd('debug');
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var position = this._intervals.findDataForIntervalContainingDate(time);
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if (defined(position)) {
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return PositionProperty.convertToReferenceFrame(
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time,
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position,
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this._referenceFrame,
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referenceFrame,
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result
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);
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}
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return undefined;
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};
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/**
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* Compares this property to the provided property and returns
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* <code>true</code> if they are equal, <code>false</code> otherwise.
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*
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* @param {Property} [other] The other property.
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* @returns {Boolean} <code>true</code> if left and right are equal, <code>false</code> otherwise.
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*/
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TimeIntervalCollectionPositionProperty.prototype.equals = function (other) {
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return (
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this === other || //
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(other instanceof TimeIntervalCollectionPositionProperty && //
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this._intervals.equals(other._intervals, Property.equals) && //
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this._referenceFrame === other._referenceFrame)
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);
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};
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/**
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* @private
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*/
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TimeIntervalCollectionPositionProperty.prototype._intervalsChanged = function () {
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this._definitionChanged.raiseEvent(this);
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};
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export default TimeIntervalCollectionPositionProperty;
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