cesium/Source/Workers/createSphereGeometry.js

CesiumJS is a JavaScript library for creating 3D globes and 2D maps in a web browser without a plugin.

/* This file is automatically rebuilt by the Cesium build process. */
define(['./when-f31b6bd1', './Cartesian2-44e93af5', './Check-285f6bfc', './EllipsoidGeometry-3ad0d151', './VertexFormat-ab7dd48c', './Math-8c161f1c', './GeometryOffsetAttribute-4b098ee5', './Transforms-eb995198', './RuntimeError-c7c236f3', './ComponentDatatype-d4a0149c', './WebGLConstants-34c08bc0', './GeometryAttribute-cc0565cd', './GeometryAttributes-e973821e', './IndexDatatype-e20e62f1'], function (when, Cartesian2, Check, EllipsoidGeometry, VertexFormat, _Math, GeometryOffsetAttribute, Transforms, RuntimeError, ComponentDatatype, WebGLConstants, GeometryAttribute, GeometryAttributes, IndexDatatype) { 'use strict';

  /**
   * A description of a sphere centered at the origin.
   *
   * @alias SphereGeometry
   * @constructor
   *
   * @param {Object} [options] Object with the following properties:
   * @param {Number} [options.radius=1.0] The radius of the sphere.
   * @param {Number} [options.stackPartitions=64] The number of times to partition the ellipsoid into stacks.
   * @param {Number} [options.slicePartitions=64] The number of times to partition the ellipsoid into radial slices.
   * @param {VertexFormat} [options.vertexFormat=VertexFormat.DEFAULT] The vertex attributes to be computed.
   *
   * @exception {DeveloperError} options.slicePartitions cannot be less than three.
   * @exception {DeveloperError} options.stackPartitions cannot be less than three.
   *
   * @see SphereGeometry#createGeometry
   *
   * @example
   * var sphere = new Cesium.SphereGeometry({
   *   radius : 100.0,
   *   vertexFormat : Cesium.VertexFormat.POSITION_ONLY
   * });
   * var geometry = Cesium.SphereGeometry.createGeometry(sphere);
   */
  function SphereGeometry(options) {
    var radius = when.defaultValue(options.radius, 1.0);
    var radii = new Cartesian2.Cartesian3(radius, radius, radius);
    var ellipsoidOptions = {
      radii: radii,
      stackPartitions: options.stackPartitions,
      slicePartitions: options.slicePartitions,
      vertexFormat: options.vertexFormat,
    };

    this._ellipsoidGeometry = new EllipsoidGeometry.EllipsoidGeometry(ellipsoidOptions);
    this._workerName = "createSphereGeometry";
  }

  /**
   * The number of elements used to pack the object into an array.
   * @type {Number}
   */
  SphereGeometry.packedLength = EllipsoidGeometry.EllipsoidGeometry.packedLength;

  /**
   * Stores the provided instance into the provided array.
   *
   * @param {SphereGeometry} value The value to pack.
   * @param {Number[]} array The array to pack into.
   * @param {Number} [startingIndex=0] The index into the array at which to start packing the elements.
   *
   * @returns {Number[]} The array that was packed into
   */
  SphereGeometry.pack = function (value, array, startingIndex) {
    //>>includeStart('debug', pragmas.debug);
    Check.Check.typeOf.object("value", value);
    //>>includeEnd('debug');

    return EllipsoidGeometry.EllipsoidGeometry.pack(value._ellipsoidGeometry, array, startingIndex);
  };

  var scratchEllipsoidGeometry = new EllipsoidGeometry.EllipsoidGeometry();
  var scratchOptions = {
    radius: undefined,
    radii: new Cartesian2.Cartesian3(),
    vertexFormat: new VertexFormat.VertexFormat(),
    stackPartitions: undefined,
    slicePartitions: undefined,
  };

  /**
   * Retrieves an instance from a packed array.
   *
   * @param {Number[]} array The packed array.
   * @param {Number} [startingIndex=0] The starting index of the element to be unpacked.
   * @param {SphereGeometry} [result] The object into which to store the result.
   * @returns {SphereGeometry} The modified result parameter or a new SphereGeometry instance if one was not provided.
   */
  SphereGeometry.unpack = function (array, startingIndex, result) {
    var ellipsoidGeometry = EllipsoidGeometry.EllipsoidGeometry.unpack(
      array,
      startingIndex,
      scratchEllipsoidGeometry
    );
    scratchOptions.vertexFormat = VertexFormat.VertexFormat.clone(
      ellipsoidGeometry._vertexFormat,
      scratchOptions.vertexFormat
    );
    scratchOptions.stackPartitions = ellipsoidGeometry._stackPartitions;
    scratchOptions.slicePartitions = ellipsoidGeometry._slicePartitions;

    if (!when.defined(result)) {
      scratchOptions.radius = ellipsoidGeometry._radii.x;
      return new SphereGeometry(scratchOptions);
    }

    Cartesian2.Cartesian3.clone(ellipsoidGeometry._radii, scratchOptions.radii);
    result._ellipsoidGeometry = new EllipsoidGeometry.EllipsoidGeometry(scratchOptions);
    return result;
  };

  /**
   * Computes the geometric representation of a sphere, including its vertices, indices, and a bounding sphere.
   *
   * @param {SphereGeometry} sphereGeometry A description of the sphere.
   * @returns {Geometry|undefined} The computed vertices and indices.
   */
  SphereGeometry.createGeometry = function (sphereGeometry) {
    return EllipsoidGeometry.EllipsoidGeometry.createGeometry(sphereGeometry._ellipsoidGeometry);
  };

  function createSphereGeometry(sphereGeometry, offset) {
    if (when.defined(offset)) {
      sphereGeometry = SphereGeometry.unpack(sphereGeometry, offset);
    }
    return SphereGeometry.createGeometry(sphereGeometry);
  }

  return createSphereGeometry;

});