cesiumDemo/Source/Core/HeadingPitchRange.js

import defaultValue from './defaultValue.js';
import defined from './defined.js';

    /**
     * Defines a heading angle, pitch angle, and range in a local frame.
     * Heading is the rotation from the local north direction where a positive angle is increasing eastward.
     * Pitch is the rotation from the local xy-plane. Positive pitch angles are above the plane. Negative pitch
     * angles are below the plane. Range is the distance from the center of the frame.
     * @alias HeadingPitchRange
     * @constructor
     *
     * @param {Number} [heading=0.0] The heading angle in radians.
     * @param {Number} [pitch=0.0] The pitch angle in radians.
     * @param {Number} [range=0.0] The distance from the center in meters.
     */
    function HeadingPitchRange(heading, pitch, range) {
        /**
         * Heading is the rotation from the local north direction where a positive angle is increasing eastward.
         * @type {Number}
         */
        this.heading = defaultValue(heading, 0.0);

        /**
         * Pitch is the rotation from the local xy-plane. Positive pitch angles
         * are above the plane. Negative pitch angles are below the plane.
         * @type {Number}
         */
        this.pitch = defaultValue(pitch, 0.0);

        /**
         * Range is the distance from the center of the local frame.
         * @type {Number}
         */
        this.range = defaultValue(range, 0.0);
    }

    /**
     * Duplicates a HeadingPitchRange instance.
     *
     * @param {HeadingPitchRange} hpr The HeadingPitchRange to duplicate.
     * @param {HeadingPitchRange} [result] The object onto which to store the result.
     * @returns {HeadingPitchRange} The modified result parameter or a new HeadingPitchRange instance if one was not provided. (Returns undefined if hpr is undefined)
     */
    HeadingPitchRange.clone = function(hpr, result) {
        if (!defined(hpr)) {
            return undefined;
        }
        if (!defined(result)) {
            result = new HeadingPitchRange();
        }

        result.heading = hpr.heading;
        result.pitch = hpr.pitch;
        result.range = hpr.range;
        return result;
    };
export default HeadingPitchRange;