guanyun3d/public/lib/Cesium-1.99/Workers/CylinderGeometry-6ab4de6a.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(['exports', './Transforms-ac2d28a9', './Matrix2-f9f1b94b', './Matrix3-ea964448', './ComponentDatatype-ebdce3ba', './CylinderGeometryLibrary-c7bef0a3', './defaultValue-135942ca', './Check-40d84a28', './GeometryAttribute-51d61732', './GeometryAttributes-899f8bd0', './GeometryOffsetAttribute-d3a42805', './IndexDatatype-fa75fe25', './Math-efde0c7b', './VertexFormat-1d6950e1'], (function (exports, Transforms, Matrix2, Matrix3, ComponentDatatype, CylinderGeometryLibrary, defaultValue, Check, GeometryAttribute, GeometryAttributes, GeometryOffsetAttribute, IndexDatatype, Math$1, VertexFormat) { 'use strict';

  const radiusScratch = new Matrix2.Cartesian2();
  const normalScratch = new Matrix3.Cartesian3();
  const bitangentScratch = new Matrix3.Cartesian3();
  const tangentScratch = new Matrix3.Cartesian3();
  const positionScratch = new Matrix3.Cartesian3();

  /**
   * A description of a cylinder.
   *
   * @alias CylinderGeometry
   * @constructor
   *
   * @param {Object} options Object with the following properties:
   * @param {Number} options.length The length of the cylinder.
   * @param {Number} options.topRadius The radius of the top of the cylinder.
   * @param {Number} options.bottomRadius The radius of the bottom of the cylinder.
   * @param {Number} [options.slices=128] The number of edges around the perimeter of the cylinder.
   * @param {VertexFormat} [options.vertexFormat=VertexFormat.DEFAULT] The vertex attributes to be computed.
   *
   * @exception {DeveloperError} options.slices must be greater than or equal to 3.
   *
   * @see CylinderGeometry.createGeometry
   *
   * @example
   * // create cylinder geometry
   * const cylinder = new Cesium.CylinderGeometry({
   *     length: 200000,
   *     topRadius: 80000,
   *     bottomRadius: 200000,
   * });
   * const geometry = Cesium.CylinderGeometry.createGeometry(cylinder);
   */
  function CylinderGeometry(options) {
    options = defaultValue.defaultValue(options, defaultValue.defaultValue.EMPTY_OBJECT);

    const length = options.length;
    const topRadius = options.topRadius;
    const bottomRadius = options.bottomRadius;
    const vertexFormat = defaultValue.defaultValue(options.vertexFormat, VertexFormat.VertexFormat.DEFAULT);
    const slices = defaultValue.defaultValue(options.slices, 128);

    //>>includeStart('debug', pragmas.debug);
    if (!defaultValue.defined(length)) {
      throw new Check.DeveloperError("options.length must be defined.");
    }
    if (!defaultValue.defined(topRadius)) {
      throw new Check.DeveloperError("options.topRadius must be defined.");
    }
    if (!defaultValue.defined(bottomRadius)) {
      throw new Check.DeveloperError("options.bottomRadius must be defined.");
    }
    if (slices < 3) {
      throw new Check.DeveloperError(
        "options.slices must be greater than or equal to 3."
      );
    }
    if (
      defaultValue.defined(options.offsetAttribute) &&
      options.offsetAttribute === GeometryOffsetAttribute.GeometryOffsetAttribute.TOP
    ) {
      throw new Check.DeveloperError(
        "GeometryOffsetAttribute.TOP is not a supported options.offsetAttribute for this geometry."
      );
    }
    //>>includeEnd('debug');

    this._length = length;
    this._topRadius = topRadius;
    this._bottomRadius = bottomRadius;
    this._vertexFormat = VertexFormat.VertexFormat.clone(vertexFormat);
    this._slices = slices;
    this._offsetAttribute = options.offsetAttribute;
    this._workerName = "createCylinderGeometry";
  }

  /**
   * The number of elements used to pack the object into an array.
   * @type {Number}
   */
  CylinderGeometry.packedLength = VertexFormat.VertexFormat.packedLength + 5;

  /**
   * Stores the provided instance into the provided array.
   *
   * @param {CylinderGeometry} 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
   */
  CylinderGeometry.pack = function (value, array, startingIndex) {
    //>>includeStart('debug', pragmas.debug);
    if (!defaultValue.defined(value)) {
      throw new Check.DeveloperError("value is required");
    }
    if (!defaultValue.defined(array)) {
      throw new Check.DeveloperError("array is required");
    }
    //>>includeEnd('debug');

    startingIndex = defaultValue.defaultValue(startingIndex, 0);

    VertexFormat.VertexFormat.pack(value._vertexFormat, array, startingIndex);
    startingIndex += VertexFormat.VertexFormat.packedLength;

    array[startingIndex++] = value._length;
    array[startingIndex++] = value._topRadius;
    array[startingIndex++] = value._bottomRadius;
    array[startingIndex++] = value._slices;
    array[startingIndex] = defaultValue.defaultValue(value._offsetAttribute, -1);

    return array;
  };

  const scratchVertexFormat = new VertexFormat.VertexFormat();
  const scratchOptions = {
    vertexFormat: scratchVertexFormat,
    length: undefined,
    topRadius: undefined,
    bottomRadius: undefined,
    slices: undefined,
    offsetAttribute: 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 {CylinderGeometry} [result] The object into which to store the result.
   * @returns {CylinderGeometry} The modified result parameter or a new CylinderGeometry instance if one was not provided.
   */
  CylinderGeometry.unpack = function (array, startingIndex, result) {
    //>>includeStart('debug', pragmas.debug);
    if (!defaultValue.defined(array)) {
      throw new Check.DeveloperError("array is required");
    }
    //>>includeEnd('debug');

    startingIndex = defaultValue.defaultValue(startingIndex, 0);

    const vertexFormat = VertexFormat.VertexFormat.unpack(
      array,
      startingIndex,
      scratchVertexFormat
    );
    startingIndex += VertexFormat.VertexFormat.packedLength;

    const length = array[startingIndex++];
    const topRadius = array[startingIndex++];
    const bottomRadius = array[startingIndex++];
    const slices = array[startingIndex++];
    const offsetAttribute = array[startingIndex];

    if (!defaultValue.defined(result)) {
      scratchOptions.length = length;
      scratchOptions.topRadius = topRadius;
      scratchOptions.bottomRadius = bottomRadius;
      scratchOptions.slices = slices;
      scratchOptions.offsetAttribute =
        offsetAttribute === -1 ? undefined : offsetAttribute;
      return new CylinderGeometry(scratchOptions);
    }

    result._vertexFormat = VertexFormat.VertexFormat.clone(vertexFormat, result._vertexFormat);
    result._length = length;
    result._topRadius = topRadius;
    result._bottomRadius = bottomRadius;
    result._slices = slices;
    result._offsetAttribute =
      offsetAttribute === -1 ? undefined : offsetAttribute;

    return result;
  };

  /**
   * Computes the geometric representation of a cylinder, including its vertices, indices, and a bounding sphere.
   *
   * @param {CylinderGeometry} cylinderGeometry A description of the cylinder.
   * @returns {Geometry|undefined} The computed vertices and indices.
   */
  CylinderGeometry.createGeometry = function (cylinderGeometry) {
    let length = cylinderGeometry._length;
    const topRadius = cylinderGeometry._topRadius;
    const bottomRadius = cylinderGeometry._bottomRadius;
    const vertexFormat = cylinderGeometry._vertexFormat;
    const slices = cylinderGeometry._slices;

    if (
      length <= 0 ||
      topRadius < 0 ||
      bottomRadius < 0 ||
      (topRadius === 0 && bottomRadius === 0)
    ) {
      return;
    }

    const twoSlices = slices + slices;
    const threeSlices = slices + twoSlices;
    const numVertices = twoSlices + twoSlices;

    const positions = CylinderGeometryLibrary.CylinderGeometryLibrary.computePositions(
      length,
      topRadius,
      bottomRadius,
      slices,
      true
    );

    const st = vertexFormat.st ? new Float32Array(numVertices * 2) : undefined;
    const normals = vertexFormat.normal
      ? new Float32Array(numVertices * 3)
      : undefined;
    const tangents = vertexFormat.tangent
      ? new Float32Array(numVertices * 3)
      : undefined;
    const bitangents = vertexFormat.bitangent
      ? new Float32Array(numVertices * 3)
      : undefined;

    let i;
    const computeNormal =
      vertexFormat.normal || vertexFormat.tangent || vertexFormat.bitangent;

    if (computeNormal) {
      const computeTangent = vertexFormat.tangent || vertexFormat.bitangent;

      let normalIndex = 0;
      let tangentIndex = 0;
      let bitangentIndex = 0;

      const theta = Math.atan2(bottomRadius - topRadius, length);
      const normal = normalScratch;
      normal.z = Math.sin(theta);
      const normalScale = Math.cos(theta);
      let tangent = tangentScratch;
      let bitangent = bitangentScratch;

      for (i = 0; i < slices; i++) {
        const angle = (i / slices) * Math$1.CesiumMath.TWO_PI;
        const x = normalScale * Math.cos(angle);
        const y = normalScale * Math.sin(angle);
        if (computeNormal) {
          normal.x = x;
          normal.y = y;

          if (computeTangent) {
            tangent = Matrix3.Cartesian3.normalize(
              Matrix3.Cartesian3.cross(Matrix3.Cartesian3.UNIT_Z, normal, tangent),
              tangent
            );
          }

          if (vertexFormat.normal) {
            normals[normalIndex++] = normal.x;
            normals[normalIndex++] = normal.y;
            normals[normalIndex++] = normal.z;
            normals[normalIndex++] = normal.x;
            normals[normalIndex++] = normal.y;
            normals[normalIndex++] = normal.z;
          }

          if (vertexFormat.tangent) {
            tangents[tangentIndex++] = tangent.x;
            tangents[tangentIndex++] = tangent.y;
            tangents[tangentIndex++] = tangent.z;
            tangents[tangentIndex++] = tangent.x;
            tangents[tangentIndex++] = tangent.y;
            tangents[tangentIndex++] = tangent.z;
          }

          if (vertexFormat.bitangent) {
            bitangent = Matrix3.Cartesian3.normalize(
              Matrix3.Cartesian3.cross(normal, tangent, bitangent),
              bitangent
            );
            bitangents[bitangentIndex++] = bitangent.x;
            bitangents[bitangentIndex++] = bitangent.y;
            bitangents[bitangentIndex++] = bitangent.z;
            bitangents[bitangentIndex++] = bitangent.x;
            bitangents[bitangentIndex++] = bitangent.y;
            bitangents[bitangentIndex++] = bitangent.z;
          }
        }
      }

      for (i = 0; i < slices; i++) {
        if (vertexFormat.normal) {
          normals[normalIndex++] = 0;
          normals[normalIndex++] = 0;
          normals[normalIndex++] = -1;
        }
        if (vertexFormat.tangent) {
          tangents[tangentIndex++] = 1;
          tangents[tangentIndex++] = 0;
          tangents[tangentIndex++] = 0;
        }
        if (vertexFormat.bitangent) {
          bitangents[bitangentIndex++] = 0;
          bitangents[bitangentIndex++] = -1;
          bitangents[bitangentIndex++] = 0;
        }
      }

      for (i = 0; i < slices; i++) {
        if (vertexFormat.normal) {
          normals[normalIndex++] = 0;
          normals[normalIndex++] = 0;
          normals[normalIndex++] = 1;
        }
        if (vertexFormat.tangent) {
          tangents[tangentIndex++] = 1;
          tangents[tangentIndex++] = 0;
          tangents[tangentIndex++] = 0;
        }
        if (vertexFormat.bitangent) {
          bitangents[bitangentIndex++] = 0;
          bitangents[bitangentIndex++] = 1;
          bitangents[bitangentIndex++] = 0;
        }
      }
    }

    const numIndices = 12 * slices - 12;
    const indices = IndexDatatype.IndexDatatype.createTypedArray(numVertices, numIndices);
    let index = 0;
    let j = 0;
    for (i = 0; i < slices - 1; i++) {
      indices[index++] = j;
      indices[index++] = j + 2;
      indices[index++] = j + 3;

      indices[index++] = j;
      indices[index++] = j + 3;
      indices[index++] = j + 1;

      j += 2;
    }

    indices[index++] = twoSlices - 2;
    indices[index++] = 0;
    indices[index++] = 1;
    indices[index++] = twoSlices - 2;
    indices[index++] = 1;
    indices[index++] = twoSlices - 1;

    for (i = 1; i < slices - 1; i++) {
      indices[index++] = twoSlices + i + 1;
      indices[index++] = twoSlices + i;
      indices[index++] = twoSlices;
    }

    for (i = 1; i < slices - 1; i++) {
      indices[index++] = threeSlices;
      indices[index++] = threeSlices + i;
      indices[index++] = threeSlices + i + 1;
    }

    let textureCoordIndex = 0;
    if (vertexFormat.st) {
      const rad = Math.max(topRadius, bottomRadius);
      for (i = 0; i < numVertices; i++) {
        const position = Matrix3.Cartesian3.fromArray(positions, i * 3, positionScratch);
        st[textureCoordIndex++] = (position.x + rad) / (2.0 * rad);
        st[textureCoordIndex++] = (position.y + rad) / (2.0 * rad);
      }
    }

    const attributes = new GeometryAttributes.GeometryAttributes();
    if (vertexFormat.position) {
      attributes.position = new GeometryAttribute.GeometryAttribute({
        componentDatatype: ComponentDatatype.ComponentDatatype.DOUBLE,
        componentsPerAttribute: 3,
        values: positions,
      });
    }

    if (vertexFormat.normal) {
      attributes.normal = new GeometryAttribute.GeometryAttribute({
        componentDatatype: ComponentDatatype.ComponentDatatype.FLOAT,
        componentsPerAttribute: 3,
        values: normals,
      });
    }

    if (vertexFormat.tangent) {
      attributes.tangent = new GeometryAttribute.GeometryAttribute({
        componentDatatype: ComponentDatatype.ComponentDatatype.FLOAT,
        componentsPerAttribute: 3,
        values: tangents,
      });
    }

    if (vertexFormat.bitangent) {
      attributes.bitangent = new GeometryAttribute.GeometryAttribute({
        componentDatatype: ComponentDatatype.ComponentDatatype.FLOAT,
        componentsPerAttribute: 3,
        values: bitangents,
      });
    }

    if (vertexFormat.st) {
      attributes.st = new GeometryAttribute.GeometryAttribute({
        componentDatatype: ComponentDatatype.ComponentDatatype.FLOAT,
        componentsPerAttribute: 2,
        values: st,
      });
    }

    radiusScratch.x = length * 0.5;
    radiusScratch.y = Math.max(bottomRadius, topRadius);

    const boundingSphere = new Transforms.BoundingSphere(
      Matrix3.Cartesian3.ZERO,
      Matrix2.Cartesian2.magnitude(radiusScratch)
    );

    if (defaultValue.defined(cylinderGeometry._offsetAttribute)) {
      length = positions.length;
      const offsetValue =
        cylinderGeometry._offsetAttribute === GeometryOffsetAttribute.GeometryOffsetAttribute.NONE
          ? 0
          : 1;
      const applyOffset = new Uint8Array(length / 3).fill(offsetValue);
      attributes.applyOffset = new GeometryAttribute.GeometryAttribute({
        componentDatatype: ComponentDatatype.ComponentDatatype.UNSIGNED_BYTE,
        componentsPerAttribute: 1,
        values: applyOffset,
      });
    }

    return new GeometryAttribute.Geometry({
      attributes: attributes,
      indices: indices,
      primitiveType: GeometryAttribute.PrimitiveType.TRIANGLES,
      boundingSphere: boundingSphere,
      offsetAttribute: cylinderGeometry._offsetAttribute,
    });
  };

  let unitCylinderGeometry;

  /**
   * Returns the geometric representation of a unit cylinder, including its vertices, indices, and a bounding sphere.
   * @returns {Geometry} The computed vertices and indices.
   *
   * @private
   */
  CylinderGeometry.getUnitCylinder = function () {
    if (!defaultValue.defined(unitCylinderGeometry)) {
      unitCylinderGeometry = CylinderGeometry.createGeometry(
        new CylinderGeometry({
          topRadius: 1.0,
          bottomRadius: 1.0,
          length: 1.0,
          vertexFormat: VertexFormat.VertexFormat.POSITION_ONLY,
        })
      );
    }
    return unitCylinderGeometry;
  };

  exports.CylinderGeometry = CylinderGeometry;

}));