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64x 84x 2x 2x 2x | import ArcType from "./ArcType.js";
import BoundingRectangle from "./BoundingRectangle.js";
import BoundingSphere from "./BoundingSphere.js";
import Cartesian2 from "./Cartesian2.js";
import Cartesian3 from "./Cartesian3.js";
import Cartographic from "./Cartographic.js";
import Check from "./Check.js";
import ComponentDatatype from "./ComponentDatatype.js";
import Frozen from "./Frozen.js";
import defined from "./defined.js";
import DeveloperError from "./DeveloperError.js";
import Ellipsoid from "./Ellipsoid.js";
import EllipsoidTangentPlane from "./EllipsoidTangentPlane.js";
import Geometry from "./Geometry.js";
import GeometryAttribute from "./GeometryAttribute.js";
import GeometryInstance from "./GeometryInstance.js";
import GeometryOffsetAttribute from "./GeometryOffsetAttribute.js";
import GeometryPipeline from "./GeometryPipeline.js";
import IndexDatatype from "./IndexDatatype.js";
import CesiumMath from "./Math.js";
import Matrix3 from "./Matrix3.js";
import PolygonGeometryLibrary from "./PolygonGeometryLibrary.js";
import PolygonPipeline from "./PolygonPipeline.js";
import Quaternion from "./Quaternion.js";
import Rectangle from "./Rectangle.js";
import Stereographic from "./Stereographic.js";
import VertexFormat from "./VertexFormat.js";
import WindingOrder from "./WindingOrder.js";
const scratchCarto1 = new Cartographic();
const scratchCarto2 = new Cartographic();
function adjustPosHeightsForNormal(position, p1, p2, ellipsoid) {
const carto1 = ellipsoid.cartesianToCartographic(position, scratchCarto1);
const height = carto1.height;
const p1Carto = ellipsoid.cartesianToCartographic(p1, scratchCarto2);
p1Carto.height = height;
ellipsoid.cartographicToCartesian(p1Carto, p1);
const p2Carto = ellipsoid.cartesianToCartographic(p2, scratchCarto2);
p2Carto.height = height - 100;
ellipsoid.cartographicToCartesian(p2Carto, p2);
}
const scratchBoundingRectangle = new BoundingRectangle();
const scratchPosition = new Cartesian3();
const scratchNormal = new Cartesian3();
const scratchTangent = new Cartesian3();
const scratchBitangent = new Cartesian3();
const p1Scratch = new Cartesian3();
const p2Scratch = new Cartesian3();
let scratchPerPosNormal = new Cartesian3();
let scratchPerPosTangent = new Cartesian3();
let scratchPerPosBitangent = new Cartesian3();
const appendTextureCoordinatesOrigin = new Cartesian2();
const appendTextureCoordinatesCartesian2 = new Cartesian2();
const appendTextureCoordinatesCartesian3 = new Cartesian3();
const appendTextureCoordinatesQuaternion = new Quaternion();
const appendTextureCoordinatesMatrix3 = new Matrix3();
const tangentMatrixScratch = new Matrix3();
function computeAttributes(options) {
const vertexFormat = options.vertexFormat;
const geometry = options.geometry;
const shadowVolume = options.shadowVolume;
const flatPositions = geometry.attributes.position.values;
const flatTexcoords = defined(geometry.attributes.st)
? geometry.attributes.st.values
: undefined;
let length = flatPositions.length;
const wall = options.wall;
const top = options.top || wall;
const 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.
const boundingRectangle = options.boundingRectangle;
const rotationAxis = options.rotationAxis;
const projectTo2d = options.projectTo2d;
const ellipsoid = options.ellipsoid;
const stRotation = options.stRotation;
const perPositionHeight = options.perPositionHeight;
const origin = appendTextureCoordinatesOrigin;
origin.x = boundingRectangle.x;
origin.y = boundingRectangle.y;
const textureCoordinates = vertexFormat.st
? new Float32Array(2 * (length / 3))
: undefined;
let normals;
if (vertexFormat.normal) {
if (perPositionHeight && top && !wall) {
normals = geometry.attributes.normal.values;
} else {
normals = new Float32Array(length);
}
}
const tangents = vertexFormat.tangent
? new Float32Array(length)
: undefined;
const bitangents = vertexFormat.bitangent
? new Float32Array(length)
: undefined;
const extrudeNormals = shadowVolume ? new Float32Array(length) : undefined;
let textureCoordIndex = 0;
let attrIndex = 0;
let normal = scratchNormal;
let tangent = scratchTangent;
let bitangent = scratchBitangent;
let recomputeNormal = true;
let textureMatrix = appendTextureCoordinatesMatrix3;
let tangentRotationMatrix = tangentMatrixScratch;
Iif (stRotation !== 0.0) {
let rotation = Quaternion.fromAxisAngle(
rotationAxis,
stRotation,
appendTextureCoordinatesQuaternion,
);
textureMatrix = Matrix3.fromQuaternion(rotation, textureMatrix);
rotation = Quaternion.fromAxisAngle(
rotationAxis,
-stRotation,
appendTextureCoordinatesQuaternion,
);
tangentRotationMatrix = Matrix3.fromQuaternion(
rotation,
tangentRotationMatrix,
);
} else {
textureMatrix = Matrix3.clone(Matrix3.IDENTITY, textureMatrix);
tangentRotationMatrix = Matrix3.clone(
Matrix3.IDENTITY,
tangentRotationMatrix,
);
}
let bottomOffset = 0;
let bottomOffset2 = 0;
if (top && bottom) {
bottomOffset = length / 2;
bottomOffset2 = length / 3;
length /= 2;
}
for (let i = 0; i < length; i += 3) {
const position = Cartesian3.fromArray(
flatPositions,
i,
appendTextureCoordinatesCartesian3,
);
if (vertexFormat.st) {
if (!defined(flatTexcoords)) {
let p = Matrix3.multiplyByVector(
textureMatrix,
position,
scratchPosition,
);
p = ellipsoid.scaleToGeodeticSurface(p, p);
const st = projectTo2d([p], appendTextureCoordinatesCartesian2)[0];
Cartesian2.subtract(st, origin, st);
const stx = CesiumMath.clamp(st.x / boundingRectangle.width, 0, 1);
const sty = CesiumMath.clamp(st.y / boundingRectangle.height, 0, 1);
if (bottom) {
textureCoordinates[textureCoordIndex + bottomOffset2] = stx;
textureCoordinates[textureCoordIndex + 1 + bottomOffset2] = sty;
}
Eif (top) {
textureCoordinates[textureCoordIndex] = stx;
textureCoordinates[textureCoordIndex + 1] = sty;
}
textureCoordIndex += 2;
}
}
if (
vertexFormat.normal ||
vertexFormat.tangent ||
vertexFormat.bitangent ||
shadowVolume
) {
const attrIndex1 = attrIndex + 1;
const attrIndex2 = attrIndex + 2;
if (wall) {
if (i + 3 < length) {
const p1 = Cartesian3.fromArray(flatPositions, i + 3, p1Scratch);
if (recomputeNormal) {
const p2 = Cartesian3.fromArray(
flatPositions,
i + length,
p2Scratch,
);
if (perPositionHeight) {
adjustPosHeightsForNormal(position, p1, p2, ellipsoid);
}
Cartesian3.subtract(p1, position, p1);
Cartesian3.subtract(p2, position, p2);
normal = Cartesian3.normalize(
Cartesian3.cross(p2, p1, normal),
normal,
);
recomputeNormal = false;
}
if (Cartesian3.equalsEpsilon(p1, position, CesiumMath.EPSILON10)) {
// if we've reached a corner
recomputeNormal = true;
}
}
if (vertexFormat.tangent || vertexFormat.bitangent) {
bitangent = ellipsoid.geodeticSurfaceNormal(position, bitangent);
Eif (vertexFormat.tangent) {
tangent = Cartesian3.normalize(
Cartesian3.cross(bitangent, normal, tangent),
tangent,
);
}
}
} else {
normal = ellipsoid.geodeticSurfaceNormal(position, normal);
if (vertexFormat.tangent || vertexFormat.bitangent) {
Iif (perPositionHeight) {
scratchPerPosNormal = Cartesian3.fromArray(
normals,
attrIndex,
scratchPerPosNormal,
);
scratchPerPosTangent = Cartesian3.cross(
Cartesian3.UNIT_Z,
scratchPerPosNormal,
scratchPerPosTangent,
);
scratchPerPosTangent = Cartesian3.normalize(
Matrix3.multiplyByVector(
tangentRotationMatrix,
scratchPerPosTangent,
scratchPerPosTangent,
),
scratchPerPosTangent,
);
if (vertexFormat.bitangent) {
scratchPerPosBitangent = Cartesian3.normalize(
Cartesian3.cross(
scratchPerPosNormal,
scratchPerPosTangent,
scratchPerPosBitangent,
),
scratchPerPosBitangent,
);
}
}
tangent = Cartesian3.cross(Cartesian3.UNIT_Z, normal, tangent);
tangent = Cartesian3.normalize(
Matrix3.multiplyByVector(tangentRotationMatrix, tangent, tangent),
tangent,
);
Eif (vertexFormat.bitangent) {
bitangent = Cartesian3.normalize(
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;
}
Eif (top) {
Iif (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;
}
Eif (top) {
Iif (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 && !defined(flatTexcoords)) {
geometry.attributes.st = new GeometryAttribute({
componentDatatype: ComponentDatatype.FLOAT,
componentsPerAttribute: 2,
values: textureCoordinates,
});
}
if (vertexFormat.normal) {
geometry.attributes.normal = new GeometryAttribute({
componentDatatype: ComponentDatatype.FLOAT,
componentsPerAttribute: 3,
values: normals,
});
}
if (vertexFormat.tangent) {
geometry.attributes.tangent = new GeometryAttribute({
componentDatatype: ComponentDatatype.FLOAT,
componentsPerAttribute: 3,
values: tangents,
});
}
if (vertexFormat.bitangent) {
geometry.attributes.bitangent = new GeometryAttribute({
componentDatatype: ComponentDatatype.FLOAT,
componentsPerAttribute: 3,
values: bitangents,
});
}
if (shadowVolume) {
geometry.attributes.extrudeDirection = new GeometryAttribute({
componentDatatype: ComponentDatatype.FLOAT,
componentsPerAttribute: 3,
values: extrudeNormals,
});
}
}
if (options.extrude && defined(options.offsetAttribute)) {
const size = flatPositions.length / 3;
let offsetAttribute = new Uint8Array(size);
if (options.offsetAttribute === GeometryOffsetAttribute.TOP) {
if ((top && bottom) || wall) {
offsetAttribute = offsetAttribute.fill(1, 0, size / 2);
} else if (top) {
offsetAttribute = offsetAttribute.fill(1);
}
} else {
const offsetValue =
options.offsetAttribute === GeometryOffsetAttribute.NONE ? 0 : 1;
offsetAttribute = offsetAttribute.fill(offsetValue);
}
geometry.attributes.applyOffset = new GeometryAttribute({
componentDatatype: ComponentDatatype.UNSIGNED_BYTE,
componentsPerAttribute: 1,
values: offsetAttribute,
});
}
return geometry;
}
const createGeometryFromPositionsExtrudedPositions = [];
function createGeometryFromPositionsExtruded(
ellipsoid,
polygon,
textureCoordinates,
granularity,
hierarchy,
perPositionHeight,
closeTop,
closeBottom,
vertexFormat,
arcType,
) {
const geos = {
walls: [],
};
let i;
if (closeTop || closeBottom) {
const topGeo = PolygonGeometryLibrary.createGeometryFromPositions(
ellipsoid,
polygon,
textureCoordinates,
granularity,
perPositionHeight,
vertexFormat,
arcType,
);
const edgePoints = topGeo.attributes.position.values;
const indices = topGeo.indices;
let numPositions;
let newIndices;
if (closeTop && closeBottom) {
const topBottomPositions = edgePoints.concat(edgePoints);
numPositions = topBottomPositions.length / 3;
newIndices = IndexDatatype.createTypedArray(
numPositions,
indices.length * 2,
);
newIndices.set(indices);
const ilength = indices.length;
const length = numPositions / 2;
for (i = 0; i < ilength; i += 3) {
const i0 = newIndices[i] + length;
const i1 = newIndices[i + 1] + length;
const 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) {
const normals = topGeo.attributes.normal.values;
topGeo.attributes.normal.values = new Float32Array(
topBottomPositions.length,
);
topGeo.attributes.normal.values.set(normals);
}
Iif (vertexFormat.st && defined(textureCoordinates)) {
const texcoords = topGeo.attributes.st.values;
topGeo.attributes.st.values = new Float32Array(numPositions * 2);
topGeo.attributes.st.values = texcoords.concat(texcoords);
}
topGeo.indices = newIndices;
} else if (closeBottom) {
numPositions = edgePoints.length / 3;
newIndices = 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({
geometry: topGeo,
});
}
let outerRing = hierarchy.outerRing;
const tangentPlane = EllipsoidTangentPlane.fromPoints(outerRing, ellipsoid);
let positions2D = tangentPlane.projectPointsOntoPlane(
outerRing,
createGeometryFromPositionsExtrudedPositions,
);
let windingOrder = PolygonPipeline.computeWindingOrder2D(positions2D);
Iif (windingOrder === WindingOrder.CLOCKWISE) {
outerRing = outerRing.slice().reverse();
}
let wallGeo = PolygonGeometryLibrary.computeWallGeometry(
outerRing,
textureCoordinates,
ellipsoid,
granularity,
perPositionHeight,
arcType,
);
geos.walls.push(
new GeometryInstance({
geometry: wallGeo,
}),
);
const holes = hierarchy.holes;
for (i = 0; i < holes.length; i++) {
let hole = holes[i];
positions2D = tangentPlane.projectPointsOntoPlane(
hole,
createGeometryFromPositionsExtrudedPositions,
);
windingOrder = PolygonPipeline.computeWindingOrder2D(positions2D);
Eif (windingOrder === WindingOrder.COUNTER_CLOCKWISE) {
hole = hole.slice().reverse();
}
wallGeo = PolygonGeometryLibrary.computeWallGeometry(
hole,
textureCoordinates,
ellipsoid,
granularity,
perPositionHeight,
arcType,
);
geos.walls.push(
new 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.default] 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}.
* @param {PolygonHierarchy} [options.textureCoordinates] Texture coordinates as a {@link PolygonHierarchy} of {@link Cartesian2} points. Has no effect for ground primitives.
*
* @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
* const 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
* ])
* )
* });
* const geometry = Cesium.PolygonGeometry.createGeometry(polygon);
*
* // 2. create a nested polygon with holes
* const 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
* ])
* )]
* )]
* )]
* )
* });
* const geometry = Cesium.PolygonGeometry.createGeometry(polygonWithHole);
*
* // 3. create extruded polygon
* const 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
* });
* const geometry = Cesium.PolygonGeometry.createGeometry(extrudedPolygon);
*/
function PolygonGeometry(options) {
//>>includeStart('debug', pragmas.debug);
Check.typeOf.object("options", options);
Check.typeOf.object("options.polygonHierarchy", options.polygonHierarchy);
Iif (
defined(options.perPositionHeight) &&
options.perPositionHeight &&
defined(options.height)
) {
throw new DeveloperError(
"Cannot use both options.perPositionHeight and options.height",
);
}
if (
defined(options.arcType) &&
options.arcType !== ArcType.GEODESIC &&
options.arcType !== ArcType.RHUMB
) {
throw new DeveloperError(
"Invalid arcType. Valid options are ArcType.GEODESIC and ArcType.RHUMB.",
);
}
//>>includeEnd('debug');
const polygonHierarchy = options.polygonHierarchy;
const vertexFormat = options.vertexFormat ?? VertexFormat.DEFAULT;
const ellipsoid = options.ellipsoid ?? Ellipsoid.default;
const granularity = options.granularity ?? CesiumMath.RADIANS_PER_DEGREE;
const stRotation = options.stRotation ?? 0.0;
const textureCoordinates = options.textureCoordinates;
const perPositionHeight = options.perPositionHeight ?? false;
const perPositionHeightExtrude =
perPositionHeight && defined(options.extrudedHeight);
let height = options.height ?? 0.0;
let extrudedHeight = options.extrudedHeight ?? height;
if (!perPositionHeightExtrude) {
const h = Math.max(height, extrudedHeight);
extrudedHeight = Math.min(height, extrudedHeight);
height = h;
}
this._vertexFormat = VertexFormat.clone(vertexFormat);
this._ellipsoid = Ellipsoid.clone(ellipsoid);
this._granularity = granularity;
this._stRotation = stRotation;
this._height = height;
this._extrudedHeight = extrudedHeight;
this._closeTop = options.closeTop ?? true;
this._closeBottom = options.closeBottom ?? true;
this._polygonHierarchy = polygonHierarchy;
this._perPositionHeight = perPositionHeight;
this._perPositionHeightExtrude = perPositionHeightExtrude;
this._shadowVolume = options.shadowVolume ?? false;
this._workerName = "createPolygonGeometry";
this._offsetAttribute = options.offsetAttribute;
this._arcType = options.arcType ?? ArcType.GEODESIC;
this._rectangle = undefined;
this._textureCoordinateRotationPoints = undefined;
this._textureCoordinates = textureCoordinates;
/**
* The number of elements used to pack the object into an array.
* @type {number}
*/
this.packedLength =
PolygonGeometryLibrary.computeHierarchyPackedLength(
polygonHierarchy,
Cartesian3,
) +
Ellipsoid.packedLength +
VertexFormat.packedLength +
(textureCoordinates
? PolygonGeometryLibrary.computeHierarchyPackedLength(
textureCoordinates,
Cartesian2,
)
: 1) +
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.default] 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}.
* @param {PolygonHierarchy} [options.textureCoordinates] Texture coordinates as a {@link PolygonHierarchy} of {@link Cartesian2} points. Has no effect for ground primitives.
* @returns {PolygonGeometry}
*
* @example
* // create a polygon from points
* const 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
* ])
* });
* const geometry = Cesium.PolygonGeometry.createGeometry(polygon);
*
* @see PolygonGeometry#createGeometry
*/
PolygonGeometry.fromPositions = function (options) {
options = options ?? Frozen.EMPTY_OBJECT;
//>>includeStart('debug', pragmas.debug);
Check.defined("options.positions", options.positions);
//>>includeEnd('debug');
const 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,
textureCoordinates: options.textureCoordinates,
};
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.typeOf.object("value", value);
Check.defined("array", array);
//>>includeEnd('debug');
startingIndex = startingIndex ?? 0;
startingIndex = PolygonGeometryLibrary.packPolygonHierarchy(
value._polygonHierarchy,
array,
startingIndex,
Cartesian3,
);
Ellipsoid.pack(value._ellipsoid, array, startingIndex);
startingIndex += Ellipsoid.packedLength;
VertexFormat.pack(value._vertexFormat, array, startingIndex);
startingIndex += 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++] = value._offsetAttribute ?? -1;
array[startingIndex++] = value._arcType;
if (defined(value._textureCoordinates)) {
startingIndex = PolygonGeometryLibrary.packPolygonHierarchy(
value._textureCoordinates,
array,
startingIndex,
Cartesian2,
);
} else {
array[startingIndex++] = -1.0;
}
array[startingIndex++] = value.packedLength;
return array;
};
const scratchEllipsoid = Ellipsoid.clone(Ellipsoid.UNIT_SPHERE);
const scratchVertexFormat = new VertexFormat();
//Only used to avoid inability to default construct.
const 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.
* @returns {PolygonGeometry} The modified result parameter or a new PolygonGeometry instance if one was not provided.
*/
PolygonGeometry.unpack = function (array, startingIndex, result) {
//>>includeStart('debug', pragmas.debug);
Check.defined("array", array);
//>>includeEnd('debug');
startingIndex = startingIndex ?? 0;
const polygonHierarchy = PolygonGeometryLibrary.unpackPolygonHierarchy(
array,
startingIndex,
Cartesian3,
);
startingIndex = polygonHierarchy.startingIndex;
delete polygonHierarchy.startingIndex;
const ellipsoid = Ellipsoid.unpack(array, startingIndex, scratchEllipsoid);
startingIndex += Ellipsoid.packedLength;
const vertexFormat = VertexFormat.unpack(
array,
startingIndex,
scratchVertexFormat,
);
startingIndex += VertexFormat.packedLength;
const height = array[startingIndex++];
const extrudedHeight = array[startingIndex++];
const granularity = array[startingIndex++];
const stRotation = array[startingIndex++];
const perPositionHeightExtrude = array[startingIndex++] === 1.0;
const perPositionHeight = array[startingIndex++] === 1.0;
const closeTop = array[startingIndex++] === 1.0;
const closeBottom = array[startingIndex++] === 1.0;
const shadowVolume = array[startingIndex++] === 1.0;
const offsetAttribute = array[startingIndex++];
const arcType = array[startingIndex++];
const textureCoordinates =
array[startingIndex] === -1.0
? undefined
: PolygonGeometryLibrary.unpackPolygonHierarchy(
array,
startingIndex,
Cartesian2,
);
if (defined(textureCoordinates)) {
startingIndex = textureCoordinates.startingIndex;
delete textureCoordinates.startingIndex;
} else {
startingIndex++;
}
const packedLength = array[startingIndex++];
Eif (!defined(result)) {
result = new PolygonGeometry(dummyOptions);
}
result._polygonHierarchy = polygonHierarchy;
result._ellipsoid = Ellipsoid.clone(ellipsoid, result._ellipsoid);
result._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._textureCoordinates = textureCoordinates;
result.packedLength = packedLength;
return result;
};
const scratchCartesian0 = new Cartesian2();
const scratchCartesian1 = new Cartesian2();
const scratchPolarClosest = new Stereographic();
function expandRectangle(
polar,
lastPolar,
ellipsoid,
arcType,
polygon,
result,
) {
const longitude = polar.longitude;
const lonAdjusted =
longitude >= 0.0 ? longitude : longitude + CesiumMath.TWO_PI;
polygon.westOverIdl = Math.min(polygon.westOverIdl, lonAdjusted);
polygon.eastOverIdl = Math.max(polygon.eastOverIdl, lonAdjusted);
result.west = Math.min(result.west, longitude);
result.east = Math.max(result.east, longitude);
const latitude = polar.getLatitude(ellipsoid);
let segmentLatitude = latitude;
result.south = Math.min(result.south, latitude);
result.north = Math.max(result.north, latitude);
if (arcType !== ArcType.RHUMB) {
// Geodesics will need to find the closest point on line. Rhumb lines will not have a latitude greater in magnitude than either of their endpoints.
const segment = Cartesian2.subtract(
lastPolar.position,
polar.position,
scratchCartesian0,
);
const t =
Cartesian2.dot(lastPolar.position, segment) /
Cartesian2.dot(segment, segment);
if (t > 0.0 && t < 1.0) {
const projected = Cartesian2.add(
lastPolar.position,
Cartesian2.multiplyByScalar(segment, -t, segment),
scratchCartesian1,
);
const closestPolar = Stereographic.clone(lastPolar, scratchPolarClosest);
closestPolar.position = projected;
const adjustedLatitude = closestPolar.getLatitude(ellipsoid);
result.south = Math.min(result.south, adjustedLatitude);
result.north = Math.max(result.north, adjustedLatitude);
Iif (Math.abs(latitude) > Math.abs(adjustedLatitude)) {
segmentLatitude = adjustedLatitude;
}
}
}
const direction = lastPolar.x * polar.y - polar.x * lastPolar.y;
// The total internal angle in either hemisphere determines if the pole is inside or outside the polygon
let angle = Math.sign(direction);
if (angle !== 0.0) {
angle *= Cartesian2.angleBetween(lastPolar.position, polar.position);
}
if (segmentLatitude >= 0.0) {
polygon.northAngle += angle;
}
if (segmentLatitude <= 0.0) {
polygon.southAngle += angle;
}
}
const scratchPolar = new Stereographic();
const scratchPolarPrevious = new Stereographic();
const polygon = {
northAngle: 0.0,
southAngle: 0.0,
westOverIdl: 0.0,
eastOverIdl: 0.0,
};
/**
* Computes a rectangle which encloses the polygon defined by the list of positions, including cases over the international date line and the poles.
*
* @param {Cartesian3[]} positions A linear ring defining the outer boundary of the polygon.
* @param {Ellipsoid} [ellipsoid=Ellipsoid.default] The ellipsoid to be used as a reference.
* @param {ArcType} [arcType=ArcType.GEODESIC] The type of line the polygon edges must follow. Valid options are {@link ArcType.GEODESIC} and {@link ArcType.RHUMB}.
* @param {Rectangle} [result] An object in which to store the result.
*
* @returns {Rectangle} The result rectangle
*/
PolygonGeometry.computeRectangleFromPositions = function (
positions,
ellipsoid,
arcType,
result,
) {
//>>includeStart('debug', pragmas.debug);
Check.defined("positions", positions);
//>>includeEnd('debug');
if (!defined(result)) {
result = new Rectangle();
}
if (positions.length < 3) {
return result;
}
result.west = Number.POSITIVE_INFINITY;
result.east = Number.NEGATIVE_INFINITY;
result.south = Number.POSITIVE_INFINITY;
result.north = Number.NEGATIVE_INFINITY;
polygon.northAngle = 0.0;
polygon.southAngle = 0.0;
polygon.westOverIdl = Number.POSITIVE_INFINITY;
polygon.eastOverIdl = Number.NEGATIVE_INFINITY;
const positionsLength = positions.length;
let lastPolarPosition = Stereographic.fromCartesian(
positions[0],
scratchPolarPrevious,
);
for (let i = 1; i < positionsLength; i++) {
const polarPosition = Stereographic.fromCartesian(
positions[i],
scratchPolar,
);
expandRectangle(
polarPosition,
lastPolarPosition,
ellipsoid,
arcType,
polygon,
result,
);
lastPolarPosition = Stereographic.clone(polarPosition, lastPolarPosition);
}
expandRectangle(
Stereographic.fromCartesian(positions[0], scratchPolar),
lastPolarPosition,
ellipsoid,
arcType,
polygon,
result,
);
if (result.east - result.west > polygon.eastOverIdl - polygon.westOverIdl) {
result.west = polygon.westOverIdl;
result.east = polygon.eastOverIdl;
Eif (result.east > CesiumMath.PI) {
result.east = result.east - CesiumMath.TWO_PI;
}
if (result.west > CesiumMath.PI) {
result.west = result.west - CesiumMath.TWO_PI;
}
}
// If either pole is inside the polygon, adjust the rectangle so the pole is included
if (
CesiumMath.equalsEpsilon(
Math.abs(polygon.northAngle),
CesiumMath.TWO_PI,
CesiumMath.EPSILON10,
)
) {
result.north = CesiumMath.PI_OVER_TWO;
result.east = CesiumMath.PI;
result.west = -CesiumMath.PI;
}
if (
CesiumMath.equalsEpsilon(
Math.abs(polygon.southAngle),
CesiumMath.TWO_PI,
CesiumMath.EPSILON10,
)
) {
result.south = -CesiumMath.PI_OVER_TWO;
result.east = CesiumMath.PI;
result.west = -CesiumMath.PI;
}
return result;
};
const scratchPolarForPlane = new Stereographic();
function getTangentPlane(rectangle, positions, ellipsoid) {
Iif (rectangle.height >= CesiumMath.PI || rectangle.width >= CesiumMath.PI) {
const polar = Stereographic.fromCartesian(
positions[0],
scratchPolarForPlane,
);
return polar.tangentPlane;
}
// Use a local tangent plane for smaller extents
return EllipsoidTangentPlane.fromPoints(positions, ellipsoid);
}
const scratchCartographicCyllindrical = new Cartographic();
function createProjectTo2d(rectangle, outerPositions, ellipsoid) {
return (positions, results) => {
// If the polygon positions span a large enough extent, use a specialized projection
Iif (rectangle.height >= CesiumMath.PI || rectangle.width >= CesiumMath.PI) {
// polygons that cross the equator must use cyllindrical coordinates to correctly compute winding order.
if (rectangle.south < 0 && rectangle.north > 0) {
if (!defined(results)) {
results = [];
}
for (let i = 0; i < positions.length; ++i) {
const cartographic = ellipsoid.cartesianToCartographic(
positions[i],
scratchCartographicCyllindrical,
);
results[i] = new Cartesian2(
cartographic.longitude / CesiumMath.PI,
cartographic.latitude / CesiumMath.PI_OVER_TWO,
);
}
results.length = positions.length;
return results;
}
return Stereographic.fromCartesianArray(positions, results);
}
// Use a local tangent plane for smaller extents
const tangentPlane = EllipsoidTangentPlane.fromPoints(
outerPositions,
ellipsoid,
);
return tangentPlane.projectPointsOntoPlane(positions, results);
};
}
function createProjectPositionTo2d(rectangle, outerRing, ellipsoid) {
// If the polygon positions span a large enough extent, use a specialized projection
Iif (rectangle.height >= CesiumMath.PI || rectangle.width >= CesiumMath.PI) {
return (position, result) => {
// polygons that cross the equator must use cyllindrical coordinates to correctly compute winding order.
if (rectangle.south < 0 && rectangle.north > 0) {
const cartographic = ellipsoid.cartesianToCartographic(
position,
scratchCartographicCyllindrical,
);
if (!defined(result)) {
result = new Cartesian2();
}
result.x = cartographic.longitude / CesiumMath.PI;
result.y = cartographic.latitude / CesiumMath.PI_OVER_TWO;
return result;
}
return Stereographic.fromCartesian(position, result);
};
}
const tangentPlane = EllipsoidTangentPlane.fromPoints(outerRing, ellipsoid);
return (position, result) => {
// Use a local tangent plane for smaller extents
return tangentPlane.projectPointsOntoPlane(position, result);
};
}
function createSplitPolygons(rectangle, ellipsoid, arcType, perPositionHeight) {
return (polygons, results) => {
if (
!perPositionHeight &&
(rectangle.height >= CesiumMath.PI_OVER_TWO ||
rectangle.width >= 2 * CesiumMath.PI_OVER_THREE)
) {
return PolygonGeometryLibrary.splitPolygonsOnEquator(
polygons,
ellipsoid,
arcType,
results,
);
}
return polygons;
};
}
function computeBoundingRectangle(outerRing, rectangle, ellipsoid, stRotation) {
Iif (rectangle.height >= CesiumMath.PI || rectangle.width >= CesiumMath.PI) {
return BoundingRectangle.fromRectangle(
rectangle,
undefined,
scratchBoundingRectangle,
);
}
const outerPositions = outerRing;
const tangentPlane = EllipsoidTangentPlane.fromPoints(
outerPositions,
ellipsoid,
);
return PolygonGeometryLibrary.computeBoundingRectangle(
tangentPlane.plane.normal,
tangentPlane.projectPointOntoPlane.bind(tangentPlane),
outerPositions,
stRotation,
scratchBoundingRectangle,
);
}
/**
* 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) {
const vertexFormat = polygonGeometry._vertexFormat;
const ellipsoid = polygonGeometry._ellipsoid;
const granularity = polygonGeometry._granularity;
const stRotation = polygonGeometry._stRotation;
const polygonHierarchy = polygonGeometry._polygonHierarchy;
const perPositionHeight = polygonGeometry._perPositionHeight;
const closeTop = polygonGeometry._closeTop;
const closeBottom = polygonGeometry._closeBottom;
const arcType = polygonGeometry._arcType;
const textureCoordinates = polygonGeometry._textureCoordinates;
const hasTextureCoordinates = defined(textureCoordinates);
const outerPositions = polygonHierarchy.positions;
if (outerPositions.length < 3) {
return;
}
const rectangle = polygonGeometry.rectangle;
const results = PolygonGeometryLibrary.polygonsFromHierarchy(
polygonHierarchy,
hasTextureCoordinates,
createProjectTo2d(rectangle, outerPositions, ellipsoid),
!perPositionHeight,
ellipsoid,
createSplitPolygons(rectangle, ellipsoid, arcType, perPositionHeight),
);
const hierarchy = results.hierarchy;
const polygons = results.polygons;
const dummyFunction = function (identity) {
return identity;
};
const textureCoordinatePolygons = hasTextureCoordinates
? PolygonGeometryLibrary.polygonsFromHierarchy(
textureCoordinates,
true,
dummyFunction,
false,
ellipsoid,
).polygons
: undefined;
if (hierarchy.length === 0) {
return;
}
const outerRing = hierarchy[0].outerRing;
const boundingRectangle = computeBoundingRectangle(
outerRing,
rectangle,
ellipsoid,
stRotation,
);
const geometries = [];
const height = polygonGeometry._height;
const extrudedHeight = polygonGeometry._extrudedHeight;
const extrude =
polygonGeometry._perPositionHeightExtrude ||
!CesiumMath.equalsEpsilon(height, extrudedHeight, 0, CesiumMath.EPSILON2);
const options = {
perPositionHeight: perPositionHeight,
vertexFormat: vertexFormat,
geometry: undefined,
rotationAxis: getTangentPlane(rectangle, outerRing, ellipsoid).plane.normal,
projectTo2d: createProjectPositionTo2d(rectangle, outerRing, ellipsoid),
boundingRectangle: boundingRectangle,
ellipsoid: ellipsoid,
stRotation: stRotation,
textureCoordinates: undefined,
bottom: false,
top: true,
wall: false,
extrude: false,
arcType: arcType,
};
let 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++) {
const splitGeometry = createGeometryFromPositionsExtruded(
ellipsoid,
polygons[i],
hasTextureCoordinates ? textureCoordinatePolygons[i] : undefined,
granularity,
hierarchy[i],
perPositionHeight,
closeTop,
closeBottom,
vertexFormat,
arcType,
);
let topAndBottom;
if (closeTop && closeBottom) {
topAndBottom = splitGeometry.topAndBottom;
options.geometry = PolygonGeometryLibrary.scaleToGeodeticHeightExtruded(
topAndBottom.geometry,
height,
extrudedHeight,
ellipsoid,
perPositionHeight,
);
} else if (closeTop) {
topAndBottom = splitGeometry.topAndBottom;
topAndBottom.geometry.attributes.position.values =
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.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);
}
const walls = splitGeometry.walls;
options.wall = true;
for (let k = 0; k < walls.length; k++) {
const wall = walls[k];
options.geometry = PolygonGeometryLibrary.scaleToGeodeticHeightExtruded(
wall.geometry,
height,
extrudedHeight,
ellipsoid,
perPositionHeight,
);
wall.geometry = computeAttributes(options);
geometries.push(wall);
}
}
} else {
for (i = 0; i < polygons.length; i++) {
const geometryInstance = new GeometryInstance({
geometry: PolygonGeometryLibrary.createGeometryFromPositions(
ellipsoid,
polygons[i],
hasTextureCoordinates ? textureCoordinatePolygons[i] : undefined,
granularity,
perPositionHeight,
vertexFormat,
arcType,
),
});
geometryInstance.geometry.attributes.position.values =
PolygonPipeline.scaleToGeodeticHeight(
geometryInstance.geometry.attributes.position.values,
height,
ellipsoid,
!perPositionHeight,
);
options.geometry = geometryInstance.geometry;
geometryInstance.geometry = computeAttributes(options);
if (defined(polygonGeometry._offsetAttribute)) {
const length =
geometryInstance.geometry.attributes.position.values.length;
const offsetValue =
polygonGeometry._offsetAttribute === GeometryOffsetAttribute.NONE
? 0
: 1;
const applyOffset = new Uint8Array(length / 3).fill(offsetValue);
geometryInstance.geometry.attributes.applyOffset =
new GeometryAttribute({
componentDatatype: ComponentDatatype.UNSIGNED_BYTE,
componentsPerAttribute: 1,
values: applyOffset,
});
}
geometries.push(geometryInstance);
}
}
const geometry = GeometryPipeline.combineInstances(geometries)[0];
geometry.attributes.position.values = new Float64Array(
geometry.attributes.position.values,
);
geometry.indices = IndexDatatype.createTypedArray(
geometry.attributes.position.values.length / 3,
geometry.indices,
);
const attributes = geometry.attributes;
const boundingSphere = BoundingSphere.fromVertices(
attributes.position.values,
);
Iif (!vertexFormat.position) {
delete attributes.position;
}
return new Geometry({
attributes: attributes,
indices: geometry.indices,
primitiveType: geometry.primitiveType,
boundingSphere: boundingSphere,
offsetAttribute: polygonGeometry._offsetAttribute,
});
};
/**
* @private
*/
PolygonGeometry.createShadowVolume = function (
polygonGeometry,
minHeightFunc,
maxHeightFunc,
) {
const granularity = polygonGeometry._granularity;
const ellipsoid = polygonGeometry._ellipsoid;
const minHeight = minHeightFunc(granularity, ellipsoid);
const 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.POSITION_ONLY,
shadowVolume: true,
arcType: polygonGeometry._arcType,
});
};
function textureCoordinateRotationPoints(polygonGeometry) {
const stRotation = -polygonGeometry._stRotation;
if (stRotation === 0.0) {
return [0, 0, 0, 1, 1, 0];
}
const ellipsoid = polygonGeometry._ellipsoid;
const positions = polygonGeometry._polygonHierarchy.positions;
const boundingRectangle = polygonGeometry.rectangle;
return Geometry._textureCoordinateRotationPoints(
positions,
stRotation,
ellipsoid,
boundingRectangle,
);
}
Object.defineProperties(PolygonGeometry.prototype, {
/**
* @private
*/
rectangle: {
get: function () {
if (!defined(this._rectangle)) {
const positions = this._polygonHierarchy.positions;
this._rectangle = PolygonGeometry.computeRectangleFromPositions(
positions,
this._ellipsoid,
this._arcType,
);
}
return this._rectangle;
},
},
/**
* For remapping texture coordinates when rendering PolygonGeometries as GroundPrimitives.
* @private
*/
textureCoordinateRotationPoints: {
get: function () {
Eif (!defined(this._textureCoordinateRotationPoints)) {
this._textureCoordinateRotationPoints =
textureCoordinateRotationPoints(this);
}
return this._textureCoordinateRotationPoints;
},
},
});
export default PolygonGeometry;
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