cesium_nxmap/_cesium@1.72.0@cesium/Source/Workers/createPolygonGeometry.js

/* This file is automatically rebuilt by the Cesium build process. */
define(['./when-e6985d2a', './Check-24cae389', './Math-392d0035', './Cartesian2-a5d6dde9', './Transforms-81680c41', './RuntimeError-61701d3e', './WebGLConstants-34c08bc0', './ComponentDatatype-cb08e294', './GeometryAttribute-6d403cd9', './GeometryAttributes-d6ea8c2b', './AttributeCompression-114c6354', './GeometryPipeline-e8a01ba6', './EncodedCartesian3-c758025f', './IndexDatatype-1be7d1f8', './IntersectionTests-f17c84f0', './Plane-ac6a1d3e', './GeometryOffsetAttribute-9c46b133', './VertexFormat-2df57ea4', './GeometryInstance-252acf0f', './arrayRemoveDuplicates-1ded18d8', './BoundingRectangle-cb9ae01b', './EllipsoidTangentPlane-85280670', './ArcType-13a53523', './EllipsoidRhumbLine-5f1ab81f', './PolygonPipeline-197b7d5c', './PolygonGeometryLibrary-a0562073', './EllipsoidGeodesic-2a1a77d2'], function (when, Check, _Math, Cartesian2, Transforms, RuntimeError, WebGLConstants, ComponentDatatype, GeometryAttribute, GeometryAttributes, AttributeCompression, GeometryPipeline, EncodedCartesian3, IndexDatatype, IntersectionTests, Plane, GeometryOffsetAttribute, VertexFormat, GeometryInstance, arrayRemoveDuplicates, BoundingRectangle, EllipsoidTangentPlane, ArcType, EllipsoidRhumbLine, PolygonPipeline, PolygonGeometryLibrary, EllipsoidGeodesic) { 'use strict';

  var scratchCarto1 = new Cartesian2.Cartographic();
  var scratchCarto2 = new Cartesian2.Cartographic();
  function adjustPosHeightsForNormal(position, p1, p2, ellipsoid) {
    var carto1 = ellipsoid.cartesianToCartographic(position, scratchCarto1);
    var height = carto1.height;
    var p1Carto = ellipsoid.cartesianToCartographic(p1, scratchCarto2);
    p1Carto.height = height;
    ellipsoid.cartographicToCartesian(p1Carto, p1);

    var p2Carto = ellipsoid.cartesianToCartographic(p2, scratchCarto2);
    p2Carto.height = height - 100;
    ellipsoid.cartographicToCartesian(p2Carto, p2);
  }

  var scratchBoundingRectangle = new BoundingRectangle.BoundingRectangle();
  var scratchPosition = new Cartesian2.Cartesian3();
  var scratchNormal = new Cartesian2.Cartesian3();
  var scratchTangent = new Cartesian2.Cartesian3();
  var scratchBitangent = new Cartesian2.Cartesian3();
  var p1Scratch = new Cartesian2.Cartesian3();
  var p2Scratch = new Cartesian2.Cartesian3();
  var scratchPerPosNormal = new Cartesian2.Cartesian3();
  var scratchPerPosTangent = new Cartesian2.Cartesian3();
  var scratchPerPosBitangent = new Cartesian2.Cartesian3();

  var appendTextureCoordinatesOrigin = new Cartesian2.Cartesian2();
  var appendTextureCoordinatesCartesian2 = new Cartesian2.Cartesian2();
  var appendTextureCoordinatesCartesian3 = new Cartesian2.Cartesian3();
  var appendTextureCoordinatesQuaternion = new Transforms.Quaternion();
  var appendTextureCoordinatesMatrix3 = new Transforms.Matrix3();
  var tangentMatrixScratch = new Transforms.Matrix3();

  function computeAttributes(options) {
    var vertexFormat = options.vertexFormat;
    var geometry = options.geometry;
    var shadowVolume = options.shadowVolume;
    var flatPositions = geometry.attributes.position.values;
    var length = flatPositions.length;
    var wall = options.wall;
    var top = options.top || wall;
    var bottom = options.bottom || wall;
    if (
      vertexFormat.st ||
      vertexFormat.normal ||
      vertexFormat.tangent ||
      vertexFormat.bitangent ||
      shadowVolume
    ) {
      // PERFORMANCE_IDEA: Compute before subdivision, then just interpolate during subdivision.
      // PERFORMANCE_IDEA: Compute with createGeometryFromPositions() for fast path when there's no holes.
      var boundingRectangle = options.boundingRectangle;
      var tangentPlane = options.tangentPlane;
      var ellipsoid = options.ellipsoid;
      var stRotation = options.stRotation;
      var perPositionHeight = options.perPositionHeight;

      var origin = appendTextureCoordinatesOrigin;
      origin.x = boundingRectangle.x;
      origin.y = boundingRectangle.y;

      var textureCoordinates = vertexFormat.st
        ? new Float32Array(2 * (length / 3))
        : undefined;
      var normals;
      if (vertexFormat.normal) {
        if (perPositionHeight && top && !wall) {
          normals = geometry.attributes.normal.values;
        } else {
          normals = new Float32Array(length);
        }
      }
      var tangents = vertexFormat.tangent ? new Float32Array(length) : undefined;
      var bitangents = vertexFormat.bitangent
        ? new Float32Array(length)
        : undefined;
      var extrudeNormals = shadowVolume ? new Float32Array(length) : undefined;

      var textureCoordIndex = 0;
      var attrIndex = 0;

      var normal = scratchNormal;
      var tangent = scratchTangent;
      var bitangent = scratchBitangent;
      var recomputeNormal = true;

      var textureMatrix = appendTextureCoordinatesMatrix3;
      var tangentRotationMatrix = tangentMatrixScratch;
      if (stRotation !== 0.0) {
        var rotation = Transforms.Quaternion.fromAxisAngle(
          tangentPlane._plane.normal,
          stRotation,
          appendTextureCoordinatesQuaternion
        );
        textureMatrix = Transforms.Matrix3.fromQuaternion(rotation, textureMatrix);

        rotation = Transforms.Quaternion.fromAxisAngle(
          tangentPlane._plane.normal,
          -stRotation,
          appendTextureCoordinatesQuaternion
        );
        tangentRotationMatrix = Transforms.Matrix3.fromQuaternion(
          rotation,
          tangentRotationMatrix
        );
      } else {
        textureMatrix = Transforms.Matrix3.clone(Transforms.Matrix3.IDENTITY, textureMatrix);
        tangentRotationMatrix = Transforms.Matrix3.clone(
          Transforms.Matrix3.IDENTITY,
          tangentRotationMatrix
        );
      }

      var bottomOffset = 0;
      var bottomOffset2 = 0;

      if (top && bottom) {
        bottomOffset = length / 2;
        bottomOffset2 = length / 3;

        length /= 2;
      }

      for (var i = 0; i < length; i += 3) {
        var position = Cartesian2.Cartesian3.fromArray(
          flatPositions,
          i,
          appendTextureCoordinatesCartesian3
        );

        if (vertexFormat.st) {
          var p = Transforms.Matrix3.multiplyByVector(
            textureMatrix,
            position,
            scratchPosition
          );
          p = ellipsoid.scaleToGeodeticSurface(p, p);
          var st = tangentPlane.projectPointOntoPlane(
            p,
            appendTextureCoordinatesCartesian2
          );
          Cartesian2.Cartesian2.subtract(st, origin, st);

          var stx = _Math.CesiumMath.clamp(st.x / boundingRectangle.width, 0, 1);
          var sty = _Math.CesiumMath.clamp(st.y / boundingRectangle.height, 0, 1);
          if (bottom) {
            textureCoordinates[textureCoordIndex + bottomOffset2] = stx;
            textureCoordinates[textureCoordIndex + 1 + bottomOffset2] = sty;
          }
          if (top) {
            textureCoordinates[textureCoordIndex] = stx;
            textureCoordinates[textureCoordIndex + 1] = sty;
          }

          textureCoordIndex += 2;
        }

        if (
          vertexFormat.normal ||
          vertexFormat.tangent ||
          vertexFormat.bitangent ||
          shadowVolume
        ) {
          var attrIndex1 = attrIndex + 1;
          var attrIndex2 = attrIndex + 2;

          if (wall) {
            if (i + 3 < length) {
              var p1 = Cartesian2.Cartesian3.fromArray(flatPositions, i + 3, p1Scratch);

              if (recomputeNormal) {
                var p2 = Cartesian2.Cartesian3.fromArray(
                  flatPositions,
                  i + length,
                  p2Scratch
                );
                if (perPositionHeight) {
                  adjustPosHeightsForNormal(position, p1, p2, ellipsoid);
                }
                Cartesian2.Cartesian3.subtract(p1, position, p1);
                Cartesian2.Cartesian3.subtract(p2, position, p2);
                normal = Cartesian2.Cartesian3.normalize(
                  Cartesian2.Cartesian3.cross(p2, p1, normal),
                  normal
                );
                recomputeNormal = false;
              }

              if (Cartesian2.Cartesian3.equalsEpsilon(p1, position, _Math.CesiumMath.EPSILON10)) {
                // if we've reached a corner
                recomputeNormal = true;
              }
            }

            if (vertexFormat.tangent || vertexFormat.bitangent) {
              bitangent = ellipsoid.geodeticSurfaceNormal(position, bitangent);
              if (vertexFormat.tangent) {
                tangent = Cartesian2.Cartesian3.normalize(
                  Cartesian2.Cartesian3.cross(bitangent, normal, tangent),
                  tangent
                );
              }
            }
          } else {
            normal = ellipsoid.geodeticSurfaceNormal(position, normal);
            if (vertexFormat.tangent || vertexFormat.bitangent) {
              if (perPositionHeight) {
                scratchPerPosNormal = Cartesian2.Cartesian3.fromArray(
                  normals,
                  attrIndex,
                  scratchPerPosNormal
                );
                scratchPerPosTangent = Cartesian2.Cartesian3.cross(
                  Cartesian2.Cartesian3.UNIT_Z,
                  scratchPerPosNormal,
                  scratchPerPosTangent
                );
                scratchPerPosTangent = Cartesian2.Cartesian3.normalize(
                  Transforms.Matrix3.multiplyByVector(
                    tangentRotationMatrix,
                    scratchPerPosTangent,
                    scratchPerPosTangent
                  ),
                  scratchPerPosTangent
                );
                if (vertexFormat.bitangent) {
                  scratchPerPosBitangent = Cartesian2.Cartesian3.normalize(
                    Cartesian2.Cartesian3.cross(
                      scratchPerPosNormal,
                      scratchPerPosTangent,
                      scratchPerPosBitangent
                    ),
                    scratchPerPosBitangent
                  );
                }
              }

              tangent = Cartesian2.Cartesian3.cross(Cartesian2.Cartesian3.UNIT_Z, normal, tangent);
              tangent = Cartesian2.Cartesian3.normalize(
                Transforms.Matrix3.multiplyByVector(tangentRotationMatrix, tangent, tangent),
                tangent
              );
              if (vertexFormat.bitangent) {
                bitangent = Cartesian2.Cartesian3.normalize(
                  Cartesian2.Cartesian3.cross(normal, tangent, bitangent),
                  bitangent
                );
              }
            }
          }

          if (vertexFormat.normal) {
            if (options.wall) {
              normals[attrIndex + bottomOffset] = normal.x;
              normals[attrIndex1 + bottomOffset] = normal.y;
              normals[attrIndex2 + bottomOffset] = normal.z;
            } else if (bottom) {
              normals[attrIndex + bottomOffset] = -normal.x;
              normals[attrIndex1 + bottomOffset] = -normal.y;
              normals[attrIndex2 + bottomOffset] = -normal.z;
            }

            if ((top && !perPositionHeight) || wall) {
              normals[attrIndex] = normal.x;
              normals[attrIndex1] = normal.y;
              normals[attrIndex2] = normal.z;
            }
          }

          if (shadowVolume) {
            if (wall) {
              normal = ellipsoid.geodeticSurfaceNormal(position, normal);
            }
            extrudeNormals[attrIndex + bottomOffset] = -normal.x;
            extrudeNormals[attrIndex1 + bottomOffset] = -normal.y;
            extrudeNormals[attrIndex2 + bottomOffset] = -normal.z;
          }

          if (vertexFormat.tangent) {
            if (options.wall) {
              tangents[attrIndex + bottomOffset] = tangent.x;
              tangents[attrIndex1 + bottomOffset] = tangent.y;
              tangents[attrIndex2 + bottomOffset] = tangent.z;
            } else if (bottom) {
              tangents[attrIndex + bottomOffset] = -tangent.x;
              tangents[attrIndex1 + bottomOffset] = -tangent.y;
              tangents[attrIndex2 + bottomOffset] = -tangent.z;
            }

            if (top) {
              if (perPositionHeight) {
                tangents[attrIndex] = scratchPerPosTangent.x;
                tangents[attrIndex1] = scratchPerPosTangent.y;
                tangents[attrIndex2] = scratchPerPosTangent.z;
              } else {
                tangents[attrIndex] = tangent.x;
                tangents[attrIndex1] = tangent.y;
                tangents[attrIndex2] = tangent.z;
              }
            }
          }

          if (vertexFormat.bitangent) {
            if (bottom) {
              bitangents[attrIndex + bottomOffset] = bitangent.x;
              bitangents[attrIndex1 + bottomOffset] = bitangent.y;
              bitangents[attrIndex2 + bottomOffset] = bitangent.z;
            }
            if (top) {
              if (perPositionHeight) {
                bitangents[attrIndex] = scratchPerPosBitangent.x;
                bitangents[attrIndex1] = scratchPerPosBitangent.y;
                bitangents[attrIndex2] = scratchPerPosBitangent.z;
              } else {
                bitangents[attrIndex] = bitangent.x;
                bitangents[attrIndex1] = bitangent.y;
                bitangents[attrIndex2] = bitangent.z;
              }
            }
          }
          attrIndex += 3;
        }
      }

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

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

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

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

      if (shadowVolume) {
        geometry.attributes.extrudeDirection = new GeometryAttribute.GeometryAttribute({
          componentDatatype: ComponentDatatype.ComponentDatatype.FLOAT,
          componentsPerAttribute: 3,
          values: extrudeNormals,
        });
      }
    }

    if (options.extrude && when.defined(options.offsetAttribute)) {
      var size = flatPositions.length / 3;
      var offsetAttribute = new Uint8Array(size);

      if (options.offsetAttribute === GeometryOffsetAttribute.GeometryOffsetAttribute.TOP) {
        if ((top && bottom) || wall) {
          offsetAttribute = GeometryOffsetAttribute.arrayFill(offsetAttribute, 1, 0, size / 2);
        } else if (top) {
          offsetAttribute = GeometryOffsetAttribute.arrayFill(offsetAttribute, 1);
        }
      } else {
        var offsetValue =
          options.offsetAttribute === GeometryOffsetAttribute.GeometryOffsetAttribute.NONE ? 0 : 1;
        offsetAttribute = GeometryOffsetAttribute.arrayFill(offsetAttribute, offsetValue);
      }

      geometry.attributes.applyOffset = new GeometryAttribute.GeometryAttribute({
        componentDatatype: ComponentDatatype.ComponentDatatype.UNSIGNED_BYTE,
        componentsPerAttribute: 1,
        values: offsetAttribute,
      });
    }

    return geometry;
  }

  var startCartographicScratch = new Cartesian2.Cartographic();
  var endCartographicScratch = new Cartesian2.Cartographic();
  var idlCross = {
    westOverIDL: 0.0,
    eastOverIDL: 0.0,
  };
  var ellipsoidGeodesic = new EllipsoidGeodesic.EllipsoidGeodesic();
  function computeRectangle(positions, ellipsoid, arcType, granularity, result) {
    result = when.defaultValue(result, new Cartesian2.Rectangle());
    if (!when.defined(positions) || positions.length < 3) {
      result.west = 0.0;
      result.north = 0.0;
      result.south = 0.0;
      result.east = 0.0;
      return result;
    }

    if (arcType === ArcType.ArcType.RHUMB) {
      return Cartesian2.Rectangle.fromCartesianArray(positions, ellipsoid, result);
    }

    if (!ellipsoidGeodesic.ellipsoid.equals(ellipsoid)) {
      ellipsoidGeodesic = new EllipsoidGeodesic.EllipsoidGeodesic(undefined, undefined, ellipsoid);
    }

    result.west = Number.POSITIVE_INFINITY;
    result.east = Number.NEGATIVE_INFINITY;
    result.south = Number.POSITIVE_INFINITY;
    result.north = Number.NEGATIVE_INFINITY;

    idlCross.westOverIDL = Number.POSITIVE_INFINITY;
    idlCross.eastOverIDL = Number.NEGATIVE_INFINITY;

    var inverseChordLength =
      1.0 / _Math.CesiumMath.chordLength(granularity, ellipsoid.maximumRadius);
    var positionsLength = positions.length;
    var endCartographic = ellipsoid.cartesianToCartographic(
      positions[0],
      endCartographicScratch
    );
    var startCartographic = startCartographicScratch;
    var swap;

    for (var i = 1; i < positionsLength; i++) {
      swap = startCartographic;
      startCartographic = endCartographic;
      endCartographic = ellipsoid.cartesianToCartographic(positions[i], swap);
      ellipsoidGeodesic.setEndPoints(startCartographic, endCartographic);
      interpolateAndGrowRectangle(
        ellipsoidGeodesic,
        inverseChordLength,
        result,
        idlCross
      );
    }

    swap = startCartographic;
    startCartographic = endCartographic;
    endCartographic = ellipsoid.cartesianToCartographic(positions[0], swap);
    ellipsoidGeodesic.setEndPoints(startCartographic, endCartographic);
    interpolateAndGrowRectangle(
      ellipsoidGeodesic,
      inverseChordLength,
      result,
      idlCross
    );

    if (result.east - result.west > idlCross.eastOverIDL - idlCross.westOverIDL) {
      result.west = idlCross.westOverIDL;
      result.east = idlCross.eastOverIDL;

      if (result.east > _Math.CesiumMath.PI) {
        result.east = result.east - _Math.CesiumMath.TWO_PI;
      }
      if (result.west > _Math.CesiumMath.PI) {
        result.west = result.west - _Math.CesiumMath.TWO_PI;
      }
    }

    return result;
  }

  var interpolatedCartographicScratch = new Cartesian2.Cartographic();
  function interpolateAndGrowRectangle(
    ellipsoidGeodesic,
    inverseChordLength,
    result,
    idlCross
  ) {
    var segmentLength = ellipsoidGeodesic.surfaceDistance;

    var numPoints = Math.ceil(segmentLength * inverseChordLength);
    var subsegmentDistance =
      numPoints > 0 ? segmentLength / (numPoints - 1) : Number.POSITIVE_INFINITY;
    var interpolationDistance = 0.0;

    for (var i = 0; i < numPoints; i++) {
      var interpolatedCartographic = ellipsoidGeodesic.interpolateUsingSurfaceDistance(
        interpolationDistance,
        interpolatedCartographicScratch
      );
      interpolationDistance += subsegmentDistance;
      var longitude = interpolatedCartographic.longitude;
      var latitude = interpolatedCartographic.latitude;

      result.west = Math.min(result.west, longitude);
      result.east = Math.max(result.east, longitude);
      result.south = Math.min(result.south, latitude);
      result.north = Math.max(result.north, latitude);

      var lonAdjusted =
        longitude >= 0 ? longitude : longitude + _Math.CesiumMath.TWO_PI;
      idlCross.westOverIDL = Math.min(idlCross.westOverIDL, lonAdjusted);
      idlCross.eastOverIDL = Math.max(idlCross.eastOverIDL, lonAdjusted);
    }
  }

  var createGeometryFromPositionsExtrudedPositions = [];

  function createGeometryFromPositionsExtruded(
    ellipsoid,
    polygon,
    granularity,
    hierarchy,
    perPositionHeight,
    closeTop,
    closeBottom,
    vertexFormat,
    arcType
  ) {
    var geos = {
      walls: [],
    };
    var i;

    if (closeTop || closeBottom) {
      var topGeo = PolygonGeometryLibrary.PolygonGeometryLibrary.createGeometryFromPositions(
        ellipsoid,
        polygon,
        granularity,
        perPositionHeight,
        vertexFormat,
        arcType
      );

      var edgePoints = topGeo.attributes.position.values;
      var indices = topGeo.indices;
      var numPositions;
      var newIndices;

      if (closeTop && closeBottom) {
        var topBottomPositions = edgePoints.concat(edgePoints);

        numPositions = topBottomPositions.length / 3;

        newIndices = IndexDatatype.IndexDatatype.createTypedArray(
          numPositions,
          indices.length * 2
        );
        newIndices.set(indices);
        var ilength = indices.length;

        var length = numPositions / 2;

        for (i = 0; i < ilength; i += 3) {
          var i0 = newIndices[i] + length;
          var i1 = newIndices[i + 1] + length;
          var i2 = newIndices[i + 2] + length;

          newIndices[i + ilength] = i2;
          newIndices[i + 1 + ilength] = i1;
          newIndices[i + 2 + ilength] = i0;
        }

        topGeo.attributes.position.values = topBottomPositions;
        if (perPositionHeight && vertexFormat.normal) {
          var normals = topGeo.attributes.normal.values;
          topGeo.attributes.normal.values = new Float32Array(
            topBottomPositions.length
          );
          topGeo.attributes.normal.values.set(normals);
        }
        topGeo.indices = newIndices;
      } else if (closeBottom) {
        numPositions = edgePoints.length / 3;
        newIndices = IndexDatatype.IndexDatatype.createTypedArray(numPositions, indices.length);

        for (i = 0; i < indices.length; i += 3) {
          newIndices[i] = indices[i + 2];
          newIndices[i + 1] = indices[i + 1];
          newIndices[i + 2] = indices[i];
        }

        topGeo.indices = newIndices;
      }

      geos.topAndBottom = new GeometryInstance.GeometryInstance({
        geometry: topGeo,
      });
    }

    var outerRing = hierarchy.outerRing;
    var tangentPlane = EllipsoidTangentPlane.EllipsoidTangentPlane.fromPoints(outerRing, ellipsoid);
    var positions2D = tangentPlane.projectPointsOntoPlane(
      outerRing,
      createGeometryFromPositionsExtrudedPositions
    );

    var windingOrder = PolygonPipeline.PolygonPipeline.computeWindingOrder2D(positions2D);
    if (windingOrder === PolygonPipeline.WindingOrder.CLOCKWISE) {
      outerRing = outerRing.slice().reverse();
    }

    var wallGeo = PolygonGeometryLibrary.PolygonGeometryLibrary.computeWallGeometry(
      outerRing,
      ellipsoid,
      granularity,
      perPositionHeight,
      arcType
    );
    geos.walls.push(
      new GeometryInstance.GeometryInstance({
        geometry: wallGeo,
      })
    );

    var holes = hierarchy.holes;
    for (i = 0; i < holes.length; i++) {
      var hole = holes[i];

      tangentPlane = EllipsoidTangentPlane.EllipsoidTangentPlane.fromPoints(hole, ellipsoid);
      positions2D = tangentPlane.projectPointsOntoPlane(
        hole,
        createGeometryFromPositionsExtrudedPositions
      );

      windingOrder = PolygonPipeline.PolygonPipeline.computeWindingOrder2D(positions2D);
      if (windingOrder === PolygonPipeline.WindingOrder.COUNTER_CLOCKWISE) {
        hole = hole.slice().reverse();
      }

      wallGeo = PolygonGeometryLibrary.PolygonGeometryLibrary.computeWallGeometry(
        hole,
        ellipsoid,
        granularity,
        perPositionHeight,
        arcType
      );
      geos.walls.push(
        new GeometryInstance.GeometryInstance({
          geometry: wallGeo,
        })
      );
    }

    return geos;
  }

  /**
   * A description of a polygon on the ellipsoid. The polygon is defined by a polygon hierarchy. Polygon geometry can be rendered with both {@link Primitive} and {@link GroundPrimitive}.
   *
   * @alias PolygonGeometry
   * @constructor
   *
   * @param {Object} options Object with the following properties:
   * @param {PolygonHierarchy} options.polygonHierarchy A polygon hierarchy that can include holes.
   * @param {Number} [options.height=0.0] The distance in meters between the polygon and the ellipsoid surface.
   * @param {Number} [options.extrudedHeight] The distance in meters between the polygon's extruded face and the ellipsoid surface.
   * @param {VertexFormat} [options.vertexFormat=VertexFormat.DEFAULT] The vertex attributes to be computed.
   * @param {Number} [options.stRotation=0.0] The rotation of the texture coordinates, in radians. A positive rotation is counter-clockwise.
   * @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 {Boolean} [options.perPositionHeight=false] Use the height of options.positions for each position instead of using options.height to determine the height.
   * @param {Boolean} [options.closeTop=true] When false, leaves off the top of an extruded polygon open.
   * @param {Boolean} [options.closeBottom=true] When false, leaves off the bottom of an extruded polygon open.
   * @param {ArcType} [options.arcType=ArcType.GEODESIC] The type of line the polygon edges must follow. Valid options are {@link ArcType.GEODESIC} and {@link ArcType.RHUMB}.
   *
   * @see PolygonGeometry#createGeometry
   * @see PolygonGeometry#fromPositions
   *
   * @demo {@link https://sandcastle.cesium.com/index.html?src=Polygon.html|Cesium Sandcastle Polygon Demo}
   *
   * @example
   * // 1. create a polygon from points
   * var polygon = new Cesium.PolygonGeometry({
   *   polygonHierarchy : new Cesium.PolygonHierarchy(
   *     Cesium.Cartesian3.fromDegreesArray([
   *       -72.0, 40.0,
   *       -70.0, 35.0,
   *       -75.0, 30.0,
   *       -70.0, 30.0,
   *       -68.0, 40.0
   *     ])
   *   )
   * });
   * var geometry = Cesium.PolygonGeometry.createGeometry(polygon);
   *
   * // 2. create a nested polygon with holes
   * var polygonWithHole = new Cesium.PolygonGeometry({
   *   polygonHierarchy : new Cesium.PolygonHierarchy(
   *     Cesium.Cartesian3.fromDegreesArray([
   *       -109.0, 30.0,
   *       -95.0, 30.0,
   *       -95.0, 40.0,
   *       -109.0, 40.0
   *     ]),
   *     [new Cesium.PolygonHierarchy(
   *       Cesium.Cartesian3.fromDegreesArray([
   *         -107.0, 31.0,
   *         -107.0, 39.0,
   *         -97.0, 39.0,
   *         -97.0, 31.0
   *       ]),
   *       [new Cesium.PolygonHierarchy(
   *         Cesium.Cartesian3.fromDegreesArray([
   *           -105.0, 33.0,
   *           -99.0, 33.0,
   *           -99.0, 37.0,
   *           -105.0, 37.0
   *         ]),
   *         [new Cesium.PolygonHierarchy(
   *           Cesium.Cartesian3.fromDegreesArray([
   *             -103.0, 34.0,
   *             -101.0, 34.0,
   *             -101.0, 36.0,
   *             -103.0, 36.0
   *           ])
   *         )]
   *       )]
   *     )]
   *   )
   * });
   * var geometry = Cesium.PolygonGeometry.createGeometry(polygonWithHole);
   *
   * // 3. create extruded polygon
   * var extrudedPolygon = new Cesium.PolygonGeometry({
   *   polygonHierarchy : new Cesium.PolygonHierarchy(
   *     Cesium.Cartesian3.fromDegreesArray([
   *       -72.0, 40.0,
   *       -70.0, 35.0,
   *       -75.0, 30.0,
   *       -70.0, 30.0,
   *       -68.0, 40.0
   *     ])
   *   ),
   *   extrudedHeight: 300000
   * });
   * var geometry = Cesium.PolygonGeometry.createGeometry(extrudedPolygon);
   */
  function PolygonGeometry(options) {
    //>>includeStart('debug', pragmas.debug);
    Check.Check.typeOf.object("options", options);
    Check.Check.typeOf.object("options.polygonHierarchy", options.polygonHierarchy);
    if (
      when.defined(options.perPositionHeight) &&
      options.perPositionHeight &&
      when.defined(options.height)
    ) {
      throw new Check.DeveloperError(
        "Cannot use both options.perPositionHeight and options.height"
      );
    }
    if (
      when.defined(options.arcType) &&
      options.arcType !== ArcType.ArcType.GEODESIC &&
      options.arcType !== ArcType.ArcType.RHUMB
    ) {
      throw new Check.DeveloperError(
        "Invalid arcType. Valid options are ArcType.GEODESIC and ArcType.RHUMB."
      );
    }
    //>>includeEnd('debug');

    var polygonHierarchy = options.polygonHierarchy;
    var vertexFormat = when.defaultValue(options.vertexFormat, VertexFormat.VertexFormat.DEFAULT);
    var ellipsoid = when.defaultValue(options.ellipsoid, Cartesian2.Ellipsoid.WGS84);
    var granularity = when.defaultValue(
      options.granularity,
      _Math.CesiumMath.RADIANS_PER_DEGREE
    );
    var stRotation = when.defaultValue(options.stRotation, 0.0);
    var perPositionHeight = when.defaultValue(options.perPositionHeight, false);
    var perPositionHeightExtrude =
      perPositionHeight && when.defined(options.extrudedHeight);
    var height = when.defaultValue(options.height, 0.0);
    var extrudedHeight = when.defaultValue(options.extrudedHeight, height);

    if (!perPositionHeightExtrude) {
      var h = Math.max(height, extrudedHeight);
      extrudedHeight = Math.min(height, extrudedHeight);
      height = h;
    }

    this._vertexFormat = VertexFormat.VertexFormat.clone(vertexFormat);
    this._ellipsoid = Cartesian2.Ellipsoid.clone(ellipsoid);
    this._granularity = granularity;
    this._stRotation = stRotation;
    this._height = height;
    this._extrudedHeight = extrudedHeight;
    this._closeTop = when.defaultValue(options.closeTop, true);
    this._closeBottom = when.defaultValue(options.closeBottom, true);
    this._polygonHierarchy = polygonHierarchy;
    this._perPositionHeight = perPositionHeight;
    this._perPositionHeightExtrude = perPositionHeightExtrude;
    this._shadowVolume = when.defaultValue(options.shadowVolume, false);
    this._workerName = "createPolygonGeometry";
    this._offsetAttribute = options.offsetAttribute;
    this._arcType = when.defaultValue(options.arcType, ArcType.ArcType.GEODESIC);

    this._rectangle = undefined;
    this._textureCoordinateRotationPoints = undefined;

    /**
     * The number of elements used to pack the object into an array.
     * @type {Number}
     */
    this.packedLength =
      PolygonGeometryLibrary.PolygonGeometryLibrary.computeHierarchyPackedLength(polygonHierarchy) +
      Cartesian2.Ellipsoid.packedLength +
      VertexFormat.VertexFormat.packedLength +
      12;
  }

  /**
   * A description of a polygon from an array of positions. Polygon geometry can be rendered with both {@link Primitive} and {@link GroundPrimitive}.
   *
   * @param {Object} options Object with the following properties:
   * @param {Cartesian3[]} options.positions An array of positions that defined the corner points of the polygon.
   * @param {Number} [options.height=0.0] The height of the polygon.
   * @param {Number} [options.extrudedHeight] The height of the polygon extrusion.
   * @param {VertexFormat} [options.vertexFormat=VertexFormat.DEFAULT] The vertex attributes to be computed.
   * @param {Number} [options.stRotation=0.0] The rotation of the texture coordinates, in radians. A positive rotation is counter-clockwise.
   * @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 {Boolean} [options.perPositionHeight=false] Use the height of options.positions for each position instead of using options.height to determine the height.
   * @param {Boolean} [options.closeTop=true] When false, leaves off the top of an extruded polygon open.
   * @param {Boolean} [options.closeBottom=true] When false, leaves off the bottom of an extruded polygon open.
   * @param {ArcType} [options.arcType=ArcType.GEODESIC] The type of line the polygon edges must follow. Valid options are {@link ArcType.GEODESIC} and {@link ArcType.RHUMB}.
   * @returns {PolygonGeometry}
   *
   *
   * @example
   * // create a polygon from points
   * var polygon = Cesium.PolygonGeometry.fromPositions({
   *   positions : Cesium.Cartesian3.fromDegreesArray([
   *     -72.0, 40.0,
   *     -70.0, 35.0,
   *     -75.0, 30.0,
   *     -70.0, 30.0,
   *     -68.0, 40.0
   *   ])
   * });
   * var geometry = Cesium.PolygonGeometry.createGeometry(polygon);
   *
   * @see PolygonGeometry#createGeometry
   */
  PolygonGeometry.fromPositions = function (options) {
    options = when.defaultValue(options, when.defaultValue.EMPTY_OBJECT);

    //>>includeStart('debug', pragmas.debug);
    Check.Check.defined("options.positions", options.positions);
    //>>includeEnd('debug');

    var newOptions = {
      polygonHierarchy: {
        positions: options.positions,
      },
      height: options.height,
      extrudedHeight: options.extrudedHeight,
      vertexFormat: options.vertexFormat,
      stRotation: options.stRotation,
      ellipsoid: options.ellipsoid,
      granularity: options.granularity,
      perPositionHeight: options.perPositionHeight,
      closeTop: options.closeTop,
      closeBottom: options.closeBottom,
      offsetAttribute: options.offsetAttribute,
      arcType: options.arcType,
    };
    return new PolygonGeometry(newOptions);
  };

  /**
   * Stores the provided instance into the provided array.
   *
   * @param {PolygonGeometry} 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
   */
  PolygonGeometry.pack = function (value, array, startingIndex) {
    //>>includeStart('debug', pragmas.debug);
    Check.Check.typeOf.object("value", value);
    Check.Check.defined("array", array);
    //>>includeEnd('debug');

    startingIndex = when.defaultValue(startingIndex, 0);

    startingIndex = PolygonGeometryLibrary.PolygonGeometryLibrary.packPolygonHierarchy(
      value._polygonHierarchy,
      array,
      startingIndex
    );

    Cartesian2.Ellipsoid.pack(value._ellipsoid, array, startingIndex);
    startingIndex += Cartesian2.Ellipsoid.packedLength;

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

    array[startingIndex++] = value._height;
    array[startingIndex++] = value._extrudedHeight;
    array[startingIndex++] = value._granularity;
    array[startingIndex++] = value._stRotation;
    array[startingIndex++] = value._perPositionHeightExtrude ? 1.0 : 0.0;
    array[startingIndex++] = value._perPositionHeight ? 1.0 : 0.0;
    array[startingIndex++] = value._closeTop ? 1.0 : 0.0;
    array[startingIndex++] = value._closeBottom ? 1.0 : 0.0;
    array[startingIndex++] = value._shadowVolume ? 1.0 : 0.0;
    array[startingIndex++] = when.defaultValue(value._offsetAttribute, -1);
    array[startingIndex++] = value._arcType;
    array[startingIndex] = value.packedLength;

    return array;
  };

  var scratchEllipsoid = Cartesian2.Ellipsoid.clone(Cartesian2.Ellipsoid.UNIT_SPHERE);
  var scratchVertexFormat = new VertexFormat.VertexFormat();

  //Only used to avoid inability to default construct.
  var dummyOptions = {
    polygonHierarchy: {},
  };

  /**
   * 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 {PolygonGeometry} [result] The object into which to store the result.
   */
  PolygonGeometry.unpack = function (array, startingIndex, result) {
    //>>includeStart('debug', pragmas.debug);
    Check.Check.defined("array", array);
    //>>includeEnd('debug');

    startingIndex = when.defaultValue(startingIndex, 0);

    var polygonHierarchy = PolygonGeometryLibrary.PolygonGeometryLibrary.unpackPolygonHierarchy(
      array,
      startingIndex
    );
    startingIndex = polygonHierarchy.startingIndex;
    delete polygonHierarchy.startingIndex;

    var ellipsoid = Cartesian2.Ellipsoid.unpack(array, startingIndex, scratchEllipsoid);
    startingIndex += Cartesian2.Ellipsoid.packedLength;

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

    var height = array[startingIndex++];
    var extrudedHeight = array[startingIndex++];
    var granularity = array[startingIndex++];
    var stRotation = array[startingIndex++];
    var perPositionHeightExtrude = array[startingIndex++] === 1.0;
    var perPositionHeight = array[startingIndex++] === 1.0;
    var closeTop = array[startingIndex++] === 1.0;
    var closeBottom = array[startingIndex++] === 1.0;
    var shadowVolume = array[startingIndex++] === 1.0;
    var offsetAttribute = array[startingIndex++];
    var arcType = array[startingIndex++];
    var packedLength = array[startingIndex];

    if (!when.defined(result)) {
      result = new PolygonGeometry(dummyOptions);
    }

    result._polygonHierarchy = polygonHierarchy;
    result._ellipsoid = Cartesian2.Ellipsoid.clone(ellipsoid, result._ellipsoid);
    result._vertexFormat = VertexFormat.VertexFormat.clone(vertexFormat, result._vertexFormat);
    result._height = height;
    result._extrudedHeight = extrudedHeight;
    result._granularity = granularity;
    result._stRotation = stRotation;
    result._perPositionHeightExtrude = perPositionHeightExtrude;
    result._perPositionHeight = perPositionHeight;
    result._closeTop = closeTop;
    result._closeBottom = closeBottom;
    result._shadowVolume = shadowVolume;
    result._offsetAttribute =
      offsetAttribute === -1 ? undefined : offsetAttribute;
    result._arcType = arcType;
    result.packedLength = packedLength;
    return result;
  };

  /**
   * Returns the bounding rectangle given the provided options
   *
   * @param {Object} options Object with the following properties:
   * @param {PolygonHierarchy} options.polygonHierarchy A polygon hierarchy that can include holes.
   * @param {Number} [options.granularity=CesiumMath.RADIANS_PER_DEGREE] The distance, in radians, between each latitude and longitude. Determines the number of positions sampled.
   * @param {ArcType} [options.arcType=ArcType.GEODESIC] The type of line the polygon edges must follow. Valid options are {@link ArcType.GEODESIC} and {@link ArcType.RHUMB}.
   * @param {Ellipsoid} [options.ellipsoid=Ellipsoid.WGS84] The ellipsoid to be used as a reference.
   * @param {Rectangle} [result] An object in which to store the result.
   *
   * @returns {Rectangle} The result rectangle
   */
  PolygonGeometry.computeRectangle = function (options, result) {
    //>>includeStart('debug', pragmas.debug);
    Check.Check.typeOf.object("options", options);
    Check.Check.typeOf.object("options.polygonHierarchy", options.polygonHierarchy);
    //>>includeEnd('debug');

    var granularity = when.defaultValue(
      options.granularity,
      _Math.CesiumMath.RADIANS_PER_DEGREE
    );
    var arcType = when.defaultValue(options.arcType, ArcType.ArcType.GEODESIC);
    //>>includeStart('debug', pragmas.debug);
    if (arcType !== ArcType.ArcType.GEODESIC && arcType !== ArcType.ArcType.RHUMB) {
      throw new Check.DeveloperError(
        "Invalid arcType. Valid options are ArcType.GEODESIC and ArcType.RHUMB."
      );
    }
    //>>includeEnd('debug');

    var polygonHierarchy = options.polygonHierarchy;
    var ellipsoid = when.defaultValue(options.ellipsoid, Cartesian2.Ellipsoid.WGS84);

    return computeRectangle(
      polygonHierarchy.positions,
      ellipsoid,
      arcType,
      granularity,
      result
    );
  };

  /**
   * Computes the geometric representation of a polygon, including its vertices, indices, and a bounding sphere.
   *
   * @param {PolygonGeometry} polygonGeometry A description of the polygon.
   * @returns {Geometry|undefined} The computed vertices and indices.
   */
  PolygonGeometry.createGeometry = function (polygonGeometry) {
    var vertexFormat = polygonGeometry._vertexFormat;
    var ellipsoid = polygonGeometry._ellipsoid;
    var granularity = polygonGeometry._granularity;
    var stRotation = polygonGeometry._stRotation;
    var polygonHierarchy = polygonGeometry._polygonHierarchy;
    var perPositionHeight = polygonGeometry._perPositionHeight;
    var closeTop = polygonGeometry._closeTop;
    var closeBottom = polygonGeometry._closeBottom;
    var arcType = polygonGeometry._arcType;

    var outerPositions = polygonHierarchy.positions;
    if (outerPositions.length < 3) {
      return;
    }

    var tangentPlane = EllipsoidTangentPlane.EllipsoidTangentPlane.fromPoints(
      outerPositions,
      ellipsoid
    );

    var results = PolygonGeometryLibrary.PolygonGeometryLibrary.polygonsFromHierarchy(
      polygonHierarchy,
      tangentPlane.projectPointsOntoPlane.bind(tangentPlane),
      !perPositionHeight,
      ellipsoid
    );

    var hierarchy = results.hierarchy;
    var polygons = results.polygons;

    if (hierarchy.length === 0) {
      return;
    }

    outerPositions = hierarchy[0].outerRing;
    var boundingRectangle = PolygonGeometryLibrary.PolygonGeometryLibrary.computeBoundingRectangle(
      tangentPlane.plane.normal,
      tangentPlane.projectPointOntoPlane.bind(tangentPlane),
      outerPositions,
      stRotation,
      scratchBoundingRectangle
    );

    var geometries = [];

    var height = polygonGeometry._height;
    var extrudedHeight = polygonGeometry._extrudedHeight;
    var extrude =
      polygonGeometry._perPositionHeightExtrude ||
      !_Math.CesiumMath.equalsEpsilon(height, extrudedHeight, 0, _Math.CesiumMath.EPSILON2);

    var options = {
      perPositionHeight: perPositionHeight,
      vertexFormat: vertexFormat,
      geometry: undefined,
      tangentPlane: tangentPlane,
      boundingRectangle: boundingRectangle,
      ellipsoid: ellipsoid,
      stRotation: stRotation,
      bottom: false,
      top: true,
      wall: false,
      extrude: false,
      arcType: arcType,
    };

    var i;

    if (extrude) {
      options.extrude = true;
      options.top = closeTop;
      options.bottom = closeBottom;
      options.shadowVolume = polygonGeometry._shadowVolume;
      options.offsetAttribute = polygonGeometry._offsetAttribute;
      for (i = 0; i < polygons.length; i++) {
        var splitGeometry = createGeometryFromPositionsExtruded(
          ellipsoid,
          polygons[i],
          granularity,
          hierarchy[i],
          perPositionHeight,
          closeTop,
          closeBottom,
          vertexFormat,
          arcType
        );

        var topAndBottom;
        if (closeTop && closeBottom) {
          topAndBottom = splitGeometry.topAndBottom;
          options.geometry = PolygonGeometryLibrary.PolygonGeometryLibrary.scaleToGeodeticHeightExtruded(
            topAndBottom.geometry,
            height,
            extrudedHeight,
            ellipsoid,
            perPositionHeight
          );
        } else if (closeTop) {
          topAndBottom = splitGeometry.topAndBottom;
          topAndBottom.geometry.attributes.position.values = PolygonPipeline.PolygonPipeline.scaleToGeodeticHeight(
            topAndBottom.geometry.attributes.position.values,
            height,
            ellipsoid,
            !perPositionHeight
          );
          options.geometry = topAndBottom.geometry;
        } else if (closeBottom) {
          topAndBottom = splitGeometry.topAndBottom;
          topAndBottom.geometry.attributes.position.values = PolygonPipeline.PolygonPipeline.scaleToGeodeticHeight(
            topAndBottom.geometry.attributes.position.values,
            extrudedHeight,
            ellipsoid,
            true
          );
          options.geometry = topAndBottom.geometry;
        }
        if (closeTop || closeBottom) {
          options.wall = false;
          topAndBottom.geometry = computeAttributes(options);
          geometries.push(topAndBottom);
        }

        var walls = splitGeometry.walls;
        options.wall = true;
        for (var k = 0; k < walls.length; k++) {
          var wall = walls[k];
          options.geometry = PolygonGeometryLibrary.PolygonGeometryLibrary.scaleToGeodeticHeightExtruded(
            wall.geometry,
            height,
            extrudedHeight,
            ellipsoid,
            perPositionHeight
          );
          wall.geometry = computeAttributes(options);
          geometries.push(wall);
        }
      }
    } else {
      for (i = 0; i < polygons.length; i++) {
        var geometryInstance = new GeometryInstance.GeometryInstance({
          geometry: PolygonGeometryLibrary.PolygonGeometryLibrary.createGeometryFromPositions(
            ellipsoid,
            polygons[i],
            granularity,
            perPositionHeight,
            vertexFormat,
            arcType
          ),
        });
        geometryInstance.geometry.attributes.position.values = PolygonPipeline.PolygonPipeline.scaleToGeodeticHeight(
          geometryInstance.geometry.attributes.position.values,
          height,
          ellipsoid,
          !perPositionHeight
        );
        options.geometry = geometryInstance.geometry;
        geometryInstance.geometry = computeAttributes(options);

        if (when.defined(polygonGeometry._offsetAttribute)) {
          var length =
            geometryInstance.geometry.attributes.position.values.length;
          var applyOffset = new Uint8Array(length / 3);
          var offsetValue =
            polygonGeometry._offsetAttribute === GeometryOffsetAttribute.GeometryOffsetAttribute.NONE
              ? 0
              : 1;
          GeometryOffsetAttribute.arrayFill(applyOffset, offsetValue);
          geometryInstance.geometry.attributes.applyOffset = new GeometryAttribute.GeometryAttribute(
            {
              componentDatatype: ComponentDatatype.ComponentDatatype.UNSIGNED_BYTE,
              componentsPerAttribute: 1,
              values: applyOffset,
            }
          );
        }

        geometries.push(geometryInstance);
      }
    }

    var geometry = GeometryPipeline.GeometryPipeline.combineInstances(geometries)[0];
    geometry.attributes.position.values = new Float64Array(
      geometry.attributes.position.values
    );
    geometry.indices = IndexDatatype.IndexDatatype.createTypedArray(
      geometry.attributes.position.values.length / 3,
      geometry.indices
    );

    var attributes = geometry.attributes;
    var boundingSphere = Transforms.BoundingSphere.fromVertices(attributes.position.values);

    if (!vertexFormat.position) {
      delete attributes.position;
    }

    return new GeometryAttribute.Geometry({
      attributes: attributes,
      indices: geometry.indices,
      primitiveType: geometry.primitiveType,
      boundingSphere: boundingSphere,
      offsetAttribute: polygonGeometry._offsetAttribute,
    });
  };

  /**
   * @private
   */
  PolygonGeometry.createShadowVolume = function (
    polygonGeometry,
    minHeightFunc,
    maxHeightFunc
  ) {
    var granularity = polygonGeometry._granularity;
    var ellipsoid = polygonGeometry._ellipsoid;

    var minHeight = minHeightFunc(granularity, ellipsoid);
    var maxHeight = maxHeightFunc(granularity, ellipsoid);

    return new PolygonGeometry({
      polygonHierarchy: polygonGeometry._polygonHierarchy,
      ellipsoid: ellipsoid,
      stRotation: polygonGeometry._stRotation,
      granularity: granularity,
      perPositionHeight: false,
      extrudedHeight: minHeight,
      height: maxHeight,
      vertexFormat: VertexFormat.VertexFormat.POSITION_ONLY,
      shadowVolume: true,
      arcType: polygonGeometry._arcType,
    });
  };

  function textureCoordinateRotationPoints(polygonGeometry) {
    var stRotation = -polygonGeometry._stRotation;
    if (stRotation === 0.0) {
      return [0, 0, 0, 1, 1, 0];
    }
    var ellipsoid = polygonGeometry._ellipsoid;
    var positions = polygonGeometry._polygonHierarchy.positions;
    var boundingRectangle = polygonGeometry.rectangle;
    return GeometryAttribute.Geometry._textureCoordinateRotationPoints(
      positions,
      stRotation,
      ellipsoid,
      boundingRectangle
    );
  }

  Object.defineProperties(PolygonGeometry.prototype, {
    /**
     * @private
     */
    rectangle: {
      get: function () {
        if (!when.defined(this._rectangle)) {
          var positions = this._polygonHierarchy.positions;
          this._rectangle = computeRectangle(
            positions,
            this._ellipsoid,
            this._arcType,
            this._granularity
          );
        }

        return this._rectangle;
      },
    },
    /**
     * For remapping texture coordinates when rendering PolygonGeometries as GroundPrimitives.
     * @private
     */
    textureCoordinateRotationPoints: {
      get: function () {
        if (!when.defined(this._textureCoordinateRotationPoints)) {
          this._textureCoordinateRotationPoints = textureCoordinateRotationPoints(
            this
          );
        }
        return this._textureCoordinateRotationPoints;
      },
    },
  });

  function createPolygonGeometry(polygonGeometry, offset) {
    if (when.defined(offset)) {
      polygonGeometry = PolygonGeometry.unpack(polygonGeometry, offset);
    }
    polygonGeometry._ellipsoid = Cartesian2.Ellipsoid.clone(polygonGeometry._ellipsoid);
    return PolygonGeometry.createGeometry(polygonGeometry);
  }

  return createPolygonGeometry;

});