guanyun3d/public/lib/Cesium-1.99/Workers/createSphereGeometry.js

/**
 * @license
 * Cesium - https://github.com/CesiumGS/cesium
 * Version 1.99
 *
 * Copyright 2011-2022 Cesium Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Columbus View (Pat. Pend.)
 *
 * Portions licensed separately.
 * See https://github.com/CesiumGS/cesium/blob/main/LICENSE.md for full licensing details.
 */

define(['./defaultValue-135942ca', './Matrix3-ea964448', './Check-40d84a28', './EllipsoidGeometry-fb52d895', './VertexFormat-1d6950e1', './Math-efde0c7b', './Transforms-ac2d28a9', './Matrix2-f9f1b94b', './RuntimeError-f0dada00', './combine-462d91dd', './ComponentDatatype-ebdce3ba', './WebGLConstants-fcb70ee3', './GeometryAttribute-51d61732', './GeometryAttributes-899f8bd0', './GeometryOffsetAttribute-d3a42805', './IndexDatatype-fa75fe25'], (function (defaultValue, Matrix3, Check, EllipsoidGeometry, VertexFormat, Math, Transforms, Matrix2, RuntimeError, combine, ComponentDatatype, WebGLConstants, GeometryAttribute, GeometryAttributes, GeometryOffsetAttribute, 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
   * const sphere = new Cesium.SphereGeometry({
   *   radius : 100.0,
   *   vertexFormat : Cesium.VertexFormat.POSITION_ONLY
   * });
   * const geometry = Cesium.SphereGeometry.createGeometry(sphere);
   */
  function SphereGeometry(options) {
    const radius = defaultValue.defaultValue(options.radius, 1.0);
    const radii = new Matrix3.Cartesian3(radius, radius, radius);
    const 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);
  };

  const scratchEllipsoidGeometry = new EllipsoidGeometry.EllipsoidGeometry();
  const scratchOptions = {
    radius: undefined,
    radii: new Matrix3.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) {
    const 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 (!defaultValue.defined(result)) {
      scratchOptions.radius = ellipsoidGeometry._radii.x;
      return new SphereGeometry(scratchOptions);
    }

    Matrix3.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 (defaultValue.defined(offset)) {
      sphereGeometry = SphereGeometry.unpack(sphereGeometry, offset);
    }
    return SphereGeometry.createGeometry(sphereGeometry);
  }

  return createSphereGeometry;

}));