text: import arrayRemoveDuplicates from "./arrayRemoveDuplicates.js";
  import BoundingRectangle from "./BoundingRectangle.js";
  import BoundingSphere from "./BoundingSphere.js";
  import Cartesian2 from "./Cartesian2.js";
  import Cartesian3 from "./Cartesian3.js";
  import ComponentDatatype from "./ComponentDatatype.js";
  import CornerType from "./CornerType.js";
  import defaultValue from "./defaultValue.js";
  import defined from "./defined.js";
  import DeveloperError from "./DeveloperError.js";
  import Ellipsoid from "./Ellipsoid.js";
  import Geometry from "./Geometry.js";
  import GeometryAttribute from "./GeometryAttribute.js";
  import GeometryAttributes from "./GeometryAttributes.js";
  import GeometryPipeline from "./GeometryPipeline.js";
  import IndexDatatype from "./IndexDatatype.js";
  import CesiumMath from "./Math.js";
  import oneTimeWarning from "./oneTimeWarning.js";
  import PolygonPipeline from "./PolygonPipeline.js";
  import PolylineVolumeGeometryLibrary from "./PolylineVolumeGeometryLibrary.js";
  import PrimitiveType from "./PrimitiveType.js";
  import VertexFormat from "./VertexFormat.js";
  import WindingOrder from "./WindingOrder.js";
  
  function computeAttributes(
    combinedPositions,
    shape,
    boundingRectangle,
    vertexFormat
  ) {
    const attributes = new GeometryAttributes();
    if (vertexFormat.position) {
      attributes.position = new GeometryAttribute({
        componentDatatype: ComponentDatatype.DOUBLE,
        componentsPerAttribute: 3,
        values: combinedPositions,
      });
    }
    const shapeLength = shape.length;
    const vertexCount = combinedPositions.length / 3;
    const length = (vertexCount - shapeLength * 2) / (shapeLength * 2);
    const firstEndIndices = PolygonPipeline.triangulate(shape);
  
    const indicesCount =
      (length - 1) * shapeLength * 6 + firstEndIndices.length * 2;
    const indices = IndexDatatype.createTypedArray(vertexCount, indicesCount);
    let i, j;
    let ll, ul, ur, lr;
    const offset = shapeLength * 2;
    let index = 0;
    for (i = 0; i < length - 1; i++) {
      for (j = 0; j < shapeLength - 1; j++) {
        ll = j * 2 + i * shapeLength * 2;
        lr = ll + offset;
        ul = ll + 1;
        ur = ul + offset;
  
        indices[index++] = ul;
        indices[index++] = ll;
        indices[index++] = ur;
        indices[index++] = ur;
        indices[index++] = ll;
        indices[index++] = lr;
      }
      ll = shapeLength * 2 - 2 + i * shapeLength * 2;
      ul = ll + 1;
      ur = ul + offset;
      lr = ll + offset;
  
      indices[index++] = ul;
      indices[index++] = ll;
      indices[index++] = ur;
      indices[index++] = ur;
      indices[index++] = ll;
      indices[index++] = lr;
    }
  
    if (vertexFormat.st || vertexFormat.tangent || vertexFormat.bitangent) {
      // st required for tangent/bitangent calculation
      const st = new Float32Array(vertexCount * 2);
      const lengthSt = 1 / (length - 1);
      const heightSt = 1 / boundingRectangle.height;
      const heightOffset = boundingRectangle.height / 2;
      let s, t;
      let stindex = 0;
      for (i = 0; i < length; i++) {
        s = i * lengthSt;
        t = heightSt * (shape[0].y + heightOffset);
        st[stindex++] = s;
        st[stindex++] = t;
        for (j = 1; j < shapeLength; j++) {
          t = heightSt * (shape[j].y + heightOffset);
          st[stindex++] = s;
          st[stindex++] = t;
          st[stindex++] = s;
          st[stindex++] = t;
        }
        t = heightSt * (shape[0].y + heightOffset);
        st[stindex++] = s;
        st[stindex++] = t;
      }
      for (j = 0; j < shapeLength; j++) {
        s = 0;
        t = heightSt * (shape[j].y + heightOffset);
        st[stindex++] = s;
        st[stindex++] = t;
      }
      for (j = 0; j < shapeLength; j++) {
        s = (length - 1) * lengthSt;
        t = heightSt * (shape[j].y + heightOffset);
        st[stindex++] = s;
        st[stindex++] = t;
      }
  
      attributes.st = new GeometryAttribute({
        componentDatatype: ComponentDatatype.FLOAT,
        componentsPerAttribute: 2,
        values: new Float32Array(st),
      });
    }
  
    const endOffset = vertexCount - shapeLength * 2;
    for (i = 0; i < firstEndIndices.length; i += 3) {
      const v0 = firstEndIndices[i] + endOffset;
      const v1 = firstEndIndices[i + 1] + endOffset;
      const v2 = firstEndIndices[i + 2] + endOffset;
  
      indices[index++] = v0;
      indices[index++] = v1;
      indices[index++] = v2;
      indices[index++] = v2 + shapeLength;
      indices[index++] = v1 + shapeLength;
      indices[index++] = v0 + shapeLength;
    }
  
    let geometry = new Geometry({
      attributes: attributes,
      indices: indices,
      boundingSphere: BoundingSphere.fromVertices(combinedPositions),
      primitiveType: PrimitiveType.TRIANGLES,
    });
  
    if (vertexFormat.normal) {
      geometry = GeometryPipeline.computeNormal(geometry);
    }
  
    if (vertexFormat.tangent || vertexFormat.bitangent) {
      try {
        geometry = GeometryPipeline.computeTangentAndBitangent(geometry);
      } catch (e) {
        oneTimeWarning(
          "polyline-volume-tangent-bitangent",
          "Unable to compute tangents and bitangents for polyline volume geometry"
        );
        //TODO https://github.com/CesiumGS/cesium/issues/3609
      }
  
      if (!vertexFormat.tangent) {
        geometry.attributes.tangent = undefined;
      }
      if (!vertexFormat.bitangent) {
        geometry.attributes.bitangent = undefined;
      }
      if (!vertexFormat.st) {
        geometry.attributes.st = undefined;
      }
    }
  
    return geometry;
  }
  
  /**
   * A description of a polyline with a volume (a 2D shape extruded along a polyline).
   *
   * @alias PolylineVolumeGeometry
   * @constructor
   *
   * @param {Object} options Object with the following properties:
   * @param {Cartesian3[]} options.polylinePositions An array of {@link Cartesian3} positions that define the center of the polyline volume.
   * @param {Cartesian2[]} options.shapePositions An array of {@link Cartesian2} positions that define the shape to be extruded along the polyline
   * @param {Ellipsoid} [options.ellipsoid=Ellipsoid.WGS84] The ellipsoid to be used as a reference.
   * @param {Number} [options.granularity=CesiumMath.RADIANS_PER_DEGREE] The distance, in radians, between each latitude and longitude. Determines the number of positions in the buffer.
   * @param {VertexFormat} [options.vertexFormat=VertexFormat.DEFAULT] The vertex attributes to be computed.
   * @param {CornerType} [options.cornerType=CornerType.ROUNDED] Determines the style of the corners.
   *
   * @see PolylineVolumeGeometry#createGeometry
   *
   * @demo {@link https://sandcastle.cesium.com/index.html?src=Polyline%20Volume.html|Cesium Sandcastle Polyline Volume Demo}
   *
   * @example
   * function computeCircle(radius) {
   *   const positions = [];
   *   for (let i = 0; i < 360; i++) {
   *     const radians = Cesium.Math.toRadians(i);
   *     positions.push(new Cesium.Cartesian2(radius * Math.cos(radians), radius * Math.sin(radians)));
   *   }
   *   return positions;
   * }
   *
   * const volume = new Cesium.PolylineVolumeGeometry({
   *   vertexFormat : Cesium.VertexFormat.POSITION_ONLY,
   *   polylinePositions : Cesium.Cartesian3.fromDegreesArray([
   *     -72.0, 40.0,
   *     -70.0, 35.0
   *   ]),
   *   shapePositions : computeCircle(100000.0)
   * });
   */
  function PolylineVolumeGeometry(options) {
    options = defaultValue(options, defaultValue.EMPTY_OBJECT);
    const positions = options.polylinePositions;
    const shape = options.shapePositions;
  
    //>>includeStart('debug', pragmas.debug);
    if (!defined(positions)) {
      throw new DeveloperError("options.polylinePositions is required.");
    }
    if (!defined(shape)) {
      throw new DeveloperError("options.shapePositions is required.");
    }
    //>>includeEnd('debug');
  
    this._positions = positions;
    this._shape = shape;
    this._ellipsoid = Ellipsoid.clone(
      defaultValue(options.ellipsoid, Ellipsoid.WGS84)
    );
    this._cornerType = defaultValue(options.cornerType, CornerType.ROUNDED);
    this._vertexFormat = VertexFormat.clone(
      defaultValue(options.vertexFormat, VertexFormat.DEFAULT)
    );
    this._granularity = defaultValue(
      options.granularity,
      CesiumMath.RADIANS_PER_DEGREE
    );
    this._workerName = "createPolylineVolumeGeometry";
  
    let numComponents = 1 + positions.length * Cartesian3.packedLength;
    numComponents += 1 + shape.length * Cartesian2.packedLength;
  
    /**
     * The number of elements used to pack the object into an array.
     * @type {Number}
     */
    this.packedLength =
      numComponents + Ellipsoid.packedLength + VertexFormat.packedLength + 2;
  }
  
  /**
   * Stores the provided instance into the provided array.
   *
   * @param {PolylineVolumeGeometry} 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
   */
  PolylineVolumeGeometry.pack = function (value, array, startingIndex) {
    //>>includeStart('debug', pragmas.debug);
    if (!defined(value)) {
      throw new DeveloperError("value is required");
    }
    if (!defined(array)) {
      throw new DeveloperError("array is required");
    }
    //>>includeEnd('debug');
  
    startingIndex = defaultValue(startingIndex, 0);
  
    let i;
  
    const positions = value._positions;
    let length = positions.length;
    array[startingIndex++] = length;
  
    for (i = 0; i < length; ++i, startingIndex += Cartesian3.packedLength) {
      Cartesian3.pack(positions[i], array, startingIndex);
    }
  
    const shape = value._shape;
    length = shape.length;
    array[startingIndex++] = length;
  
    for (i = 0; i < length; ++i, startingIndex += Cartesian2.packedLength) {
      Cartesian2.pack(shape[i], array, startingIndex);
    }
  
    Ellipsoid.pack(value._ellipsoid, array, startingIndex);
    startingIndex += Ellipsoid.packedLength;
  
    VertexFormat.pack(value._vertexFormat, array, startingIndex);
    startingIndex += VertexFormat.packedLength;
  
    array[startingIndex++] = value._cornerType;
    array[startingIndex] = value._granularity;
  
    return array;
  };
  
  const scratchEllipsoid = Ellipsoid.clone(Ellipsoid.UNIT_SPHERE);
  const scratchVertexFormat = new VertexFormat();
  const scratchOptions = {
    polylinePositions: undefined,
    shapePositions: undefined,
    ellipsoid: scratchEllipsoid,
    vertexFormat: scratchVertexFormat,
    cornerType: undefined,
    granularity: 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 {PolylineVolumeGeometry} [result] The object into which to store the result.
   * @returns {PolylineVolumeGeometry} The modified result parameter or a new PolylineVolumeGeometry instance if one was not provided.
   */
  PolylineVolumeGeometry.unpack = function (array, startingIndex, result) {
    //>>includeStart('debug', pragmas.debug);
    if (!defined(array)) {
      throw new DeveloperError("array is required");
    }
    //>>includeEnd('debug');
  
    startingIndex = defaultValue(startingIndex, 0);
  
    let i;
  
    let length = array[startingIndex++];
    const positions = new Array(length);
  
    for (i = 0; i < length; ++i, startingIndex += Cartesian3.packedLength) {
      positions[i] = Cartesian3.unpack(array, startingIndex);
    }
  
    length = array[startingIndex++];
    const shape = new Array(length);
  
    for (i = 0; i < length; ++i, startingIndex += Cartesian2.packedLength) {
      shape[i] = Cartesian2.unpack(array, startingIndex);
    }
  
    const ellipsoid = Ellipsoid.unpack(array, startingIndex, scratchEllipsoid);
    startingIndex += Ellipsoid.packedLength;
  
    const vertexFormat = VertexFormat.unpack(
      array,
      startingIndex,
      scratchVertexFormat
    );
    startingIndex += VertexFormat.packedLength;
  
    const cornerType = array[startingIndex++];
    const granularity = array[startingIndex];
  
    if (!defined(result)) {
      scratchOptions.polylinePositions = positions;
      scratchOptions.shapePositions = shape;
      scratchOptions.cornerType = cornerType;
      scratchOptions.granularity = granularity;
      return new PolylineVolumeGeometry(scratchOptions);
    }
  
    result._positions = positions;
    result._shape = shape;
    result._ellipsoid = Ellipsoid.clone(ellipsoid, result._ellipsoid);
    result._vertexFormat = VertexFormat.clone(vertexFormat, result._vertexFormat);
    result._cornerType = cornerType;
    result._granularity = granularity;
  
    return result;
  };
  
  const brScratch = new BoundingRectangle();
  
  /**
   * Computes the geometric representation of a polyline with a volume, including its vertices, indices, and a bounding sphere.
   *
   * @param {PolylineVolumeGeometry} polylineVolumeGeometry A description of the polyline volume.
   * @returns {Geometry|undefined} The computed vertices and indices.
   */
  PolylineVolumeGeometry.createGeometry = function (polylineVolumeGeometry) {
    const positions = polylineVolumeGeometry._positions;
    const cleanPositions = arrayRemoveDuplicates(
      positions,
      Cartesian3.equalsEpsilon
    );
    let shape2D = polylineVolumeGeometry._shape;
    shape2D = PolylineVolumeGeometryLibrary.removeDuplicatesFromShape(shape2D);
  
    if (cleanPositions.length < 2 || shape2D.length < 3) {
      return undefined;
    }
  
    if (
      PolygonPipeline.computeWindingOrder2D(shape2D) === WindingOrder.CLOCKWISE
    ) {
      shape2D.reverse();
    }
    const boundingRectangle = BoundingRectangle.fromPoints(shape2D, brScratch);
  
    const computedPositions = PolylineVolumeGeometryLibrary.computePositions(
      cleanPositions,
      shape2D,
      boundingRectangle,
      polylineVolumeGeometry,
      true
    );
    return computeAttributes(
      computedPositions,
      shape2D,
      boundingRectangle,
      polylineVolumeGeometry._vertexFormat
    );
  };
  export default PolylineVolumeGeometry;
  