import arrayRemoveDuplicates from './arrayRemoveDuplicates.js';
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import BoundingSphere from './BoundingSphere.js';
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import Cartesian3 from './Cartesian3.js';
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import Check from './Check.js';
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import ComponentDatatype from './ComponentDatatype.js';
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import CoplanarPolygonGeometryLibrary from './CoplanarPolygonGeometryLibrary.js';
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import defaultValue from './defaultValue.js';
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import defined from './defined.js';
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import Geometry from './Geometry.js';
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import GeometryAttribute from './GeometryAttribute.js';
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import GeometryAttributes from './GeometryAttributes.js';
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import GeometryInstance from './GeometryInstance.js';
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import GeometryPipeline from './GeometryPipeline.js';
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import IndexDatatype from './IndexDatatype.js';
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import PolygonGeometryLibrary from './PolygonGeometryLibrary.js';
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import PrimitiveType from './PrimitiveType.js';
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function createGeometryFromPositions(positions){
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var length = positions.length;
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var flatPositions = new Float64Array(length * 3);
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var indices = IndexDatatype.createTypedArray(length, length * 2);
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var positionIndex = 0;
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var index = 0;
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for (var i = 0; i < length; i++) {
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var position = positions[i];
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flatPositions[positionIndex++] = position.x;
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flatPositions[positionIndex++] = position.y;
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flatPositions[positionIndex++] = position.z;
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indices[index++] = i;
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indices[index++] = (i + 1) % length;
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}
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var attributes = new GeometryAttributes({
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position: new GeometryAttribute({
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componentDatatype : ComponentDatatype.DOUBLE,
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componentsPerAttribute : 3,
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values : flatPositions
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})
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});
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return new Geometry({
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attributes : attributes,
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indices : indices,
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primitiveType : PrimitiveType.LINES
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});
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}
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/**
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* A description of the outline of a polygon composed of arbitrary coplanar positions.
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*
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* @alias CoplanarPolygonOutlineGeometry
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* @constructor
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*
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* @param {Object} options Object with the following properties:
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* @param {PolygonHierarchy} options.polygonHierarchy A polygon hierarchy that can include holes.
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*
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* @see CoplanarPolygonOutlineGeometry.createGeometry
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*
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* @example
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* var polygonOutline = new Cesium.CoplanarPolygonOutlineGeometry({
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* positions : Cesium.Cartesian3.fromDegreesArrayHeights([
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* -90.0, 30.0, 0.0,
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* -90.0, 30.0, 1000.0,
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* -80.0, 30.0, 1000.0,
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* -80.0, 30.0, 0.0
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* ])
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* });
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* var geometry = Cesium.CoplanarPolygonOutlineGeometry.createGeometry(polygonOutline);
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*/
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function CoplanarPolygonOutlineGeometry(options) {
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options = defaultValue(options, defaultValue.EMPTY_OBJECT);
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var polygonHierarchy = options.polygonHierarchy;
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//>>includeStart('debug', pragmas.debug);
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Check.defined('options.polygonHierarchy', polygonHierarchy);
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//>>includeEnd('debug');
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this._polygonHierarchy = polygonHierarchy;
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this._workerName = 'createCoplanarPolygonOutlineGeometry';
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/**
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* The number of elements used to pack the object into an array.
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* @type {Number}
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*/
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this.packedLength = PolygonGeometryLibrary.computeHierarchyPackedLength(polygonHierarchy) + 1;
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}
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/**
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* A description of a coplanar polygon outline from an array of positions.
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*
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* @param {Object} options Object with the following properties:
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* @param {Cartesian3[]} options.positions An array of positions that defined the corner points of the polygon.
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* @returns {CoplanarPolygonOutlineGeometry}
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*/
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CoplanarPolygonOutlineGeometry.fromPositions = function(options) {
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options = defaultValue(options, defaultValue.EMPTY_OBJECT);
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//>>includeStart('debug', pragmas.debug);
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Check.defined('options.positions', options.positions);
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//>>includeEnd('debug');
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var newOptions = {
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polygonHierarchy : {
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positions : options.positions
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}
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};
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return new CoplanarPolygonOutlineGeometry(newOptions);
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};
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/**
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* Stores the provided instance into the provided array.
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*
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* @param {CoplanarPolygonOutlineGeometry} value The value to pack.
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* @param {Number[]} array The array to pack into.
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* @param {Number} [startingIndex=0] The index into the array at which to start packing the elements.
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*
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* @returns {Number[]} The array that was packed into
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*/
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CoplanarPolygonOutlineGeometry.pack = function(value, array, startingIndex) {
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.object('value', value);
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Check.defined('array', array);
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//>>includeEnd('debug');
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startingIndex = defaultValue(startingIndex, 0);
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startingIndex = PolygonGeometryLibrary.packPolygonHierarchy(value._polygonHierarchy, array, startingIndex);
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array[startingIndex] = value.packedLength;
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return array;
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};
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var scratchOptions = {
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polygonHierarchy : {}
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};
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/**
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* Retrieves an instance from a packed array.
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*
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* @param {Number[]} array The packed array.
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* @param {Number} [startingIndex=0] The starting index of the element to be unpacked.
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* @param {CoplanarPolygonOutlineGeometry} [result] The object into which to store the result.
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* @returns {CoplanarPolygonOutlineGeometry} The modified result parameter or a new CoplanarPolygonOutlineGeometry instance if one was not provided.
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*/
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CoplanarPolygonOutlineGeometry.unpack = function(array, startingIndex, result) {
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//>>includeStart('debug', pragmas.debug);
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Check.defined('array', array);
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//>>includeEnd('debug');
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startingIndex = defaultValue(startingIndex, 0);
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var polygonHierarchy = PolygonGeometryLibrary.unpackPolygonHierarchy(array, startingIndex);
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startingIndex = polygonHierarchy.startingIndex;
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delete polygonHierarchy.startingIndex;
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var packedLength = array[startingIndex];
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if (!defined(result)) {
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result = new CoplanarPolygonOutlineGeometry(scratchOptions);
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}
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result._polygonHierarchy = polygonHierarchy;
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result.packedLength = packedLength;
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return result;
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};
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/**
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* Computes the geometric representation of an arbitrary coplanar polygon, including its vertices, indices, and a bounding sphere.
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*
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* @param {CoplanarPolygonOutlineGeometry} polygonGeometry A description of the polygon.
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* @returns {Geometry|undefined} The computed vertices and indices.
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*/
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CoplanarPolygonOutlineGeometry.createGeometry = function(polygonGeometry) {
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var polygonHierarchy = polygonGeometry._polygonHierarchy;
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var outerPositions = polygonHierarchy.positions;
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outerPositions = arrayRemoveDuplicates(outerPositions, Cartesian3.equalsEpsilon, true);
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if (outerPositions.length < 3) {
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return;
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}
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var isValid = CoplanarPolygonGeometryLibrary.validOutline(outerPositions);
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if (!isValid) {
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return undefined;
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}
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var polygons = PolygonGeometryLibrary.polygonOutlinesFromHierarchy(polygonHierarchy, false);
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if (polygons.length === 0) {
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return undefined;
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}
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var geometries = [];
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for (var i = 0; i < polygons.length; i++) {
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var geometryInstance = new GeometryInstance({
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geometry : createGeometryFromPositions(polygons[i])
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});
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geometries.push(geometryInstance);
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}
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var geometry = GeometryPipeline.combineInstances(geometries)[0];
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var boundingSphere = BoundingSphere.fromPoints(polygonHierarchy.positions);
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return new Geometry({
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attributes : geometry.attributes,
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indices : geometry.indices,
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primitiveType : geometry.primitiveType,
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boundingSphere : boundingSphere
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});
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};
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export default CoplanarPolygonOutlineGeometry;
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