import Cartesian3 from './Cartesian3.js';
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import Check from './Check.js';
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import defaultValue from './defaultValue.js';
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import defined from './defined.js';
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import EllipseOutlineGeometry from './EllipseOutlineGeometry.js';
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import Ellipsoid from './Ellipsoid.js';
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/**
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* A description of the outline of a circle on the ellipsoid.
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*
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* @alias CircleOutlineGeometry
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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 {Cartesian3} options.center The circle's center point in the fixed frame.
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* @param {Number} options.radius The radius in meters.
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* @param {Ellipsoid} [options.ellipsoid=Ellipsoid.WGS84] The ellipsoid the circle will be on.
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* @param {Number} [options.height=0.0] The distance in meters between the circle and the ellipsoid surface.
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* @param {Number} [options.granularity=0.02] The angular distance between points on the circle in radians.
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* @param {Number} [options.extrudedHeight=0.0] The distance in meters between the circle's extruded face and the ellipsoid surface.
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* @param {Number} [options.numberOfVerticalLines=16] Number of lines to draw between the top and bottom of an extruded circle.
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*
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* @exception {DeveloperError} radius must be greater than zero.
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* @exception {DeveloperError} granularity must be greater than zero.
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*
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* @see CircleOutlineGeometry.createGeometry
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* @see Packable
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*
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* @example
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* // Create a circle.
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* var circle = new Cesium.CircleOutlineGeometry({
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* center : Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883),
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* radius : 100000.0
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* });
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* var geometry = Cesium.CircleOutlineGeometry.createGeometry(circle);
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*/
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function CircleOutlineGeometry(options) {
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options = defaultValue(options, defaultValue.EMPTY_OBJECT);
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var radius = options.radius;
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.number('radius', radius);
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//>>includeEnd('debug');
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var ellipseGeometryOptions = {
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center : options.center,
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semiMajorAxis : radius,
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semiMinorAxis : radius,
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ellipsoid : options.ellipsoid,
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height : options.height,
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extrudedHeight : options.extrudedHeight,
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granularity : options.granularity,
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numberOfVerticalLines : options.numberOfVerticalLines
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};
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this._ellipseGeometry = new EllipseOutlineGeometry(ellipseGeometryOptions);
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this._workerName = 'createCircleOutlineGeometry';
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}
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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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CircleOutlineGeometry.packedLength = EllipseOutlineGeometry.packedLength;
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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 {CircleOutlineGeometry} 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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CircleOutlineGeometry.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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//>>includeEnd('debug');
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return EllipseOutlineGeometry.pack(value._ellipseGeometry, array, startingIndex);
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};
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var scratchEllipseGeometry = new EllipseOutlineGeometry({
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center : new Cartesian3(),
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semiMajorAxis : 1.0,
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semiMinorAxis : 1.0
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});
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var scratchOptions = {
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center : new Cartesian3(),
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radius : undefined,
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ellipsoid : Ellipsoid.clone(Ellipsoid.UNIT_SPHERE),
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height : undefined,
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extrudedHeight : undefined,
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granularity : undefined,
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numberOfVerticalLines : undefined,
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semiMajorAxis : undefined,
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semiMinorAxis : undefined
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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 {CircleOutlineGeometry} [result] The object into which to store the result.
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* @returns {CircleOutlineGeometry} The modified result parameter or a new CircleOutlineGeometry instance if one was not provided.
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*/
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CircleOutlineGeometry.unpack = function(array, startingIndex, result) {
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var ellipseGeometry = EllipseOutlineGeometry.unpack(array, startingIndex, scratchEllipseGeometry);
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scratchOptions.center = Cartesian3.clone(ellipseGeometry._center, scratchOptions.center);
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scratchOptions.ellipsoid = Ellipsoid.clone(ellipseGeometry._ellipsoid, scratchOptions.ellipsoid);
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scratchOptions.height = ellipseGeometry._height;
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scratchOptions.extrudedHeight = ellipseGeometry._extrudedHeight;
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scratchOptions.granularity = ellipseGeometry._granularity;
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scratchOptions.numberOfVerticalLines = ellipseGeometry._numberOfVerticalLines;
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if (!defined(result)) {
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scratchOptions.radius = ellipseGeometry._semiMajorAxis;
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return new CircleOutlineGeometry(scratchOptions);
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}
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scratchOptions.semiMajorAxis = ellipseGeometry._semiMajorAxis;
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scratchOptions.semiMinorAxis = ellipseGeometry._semiMinorAxis;
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result._ellipseGeometry = new EllipseOutlineGeometry(scratchOptions);
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return result;
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};
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/**
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* Computes the geometric representation of an outline of a circle on an ellipsoid, including its vertices, indices, and a bounding sphere.
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*
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* @param {CircleOutlineGeometry} circleGeometry A description of the circle.
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* @returns {Geometry|undefined} The computed vertices and indices.
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*/
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CircleOutlineGeometry.createGeometry = function(circleGeometry) {
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return EllipseOutlineGeometry.createGeometry(circleGeometry._ellipseGeometry);
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};
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export default CircleOutlineGeometry;
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