108 lines
2.5 KiB
JavaScript
108 lines
2.5 KiB
JavaScript
/**
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* @module ol/geom/Point
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*/
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import {inherits} from '../util.js';
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import {createOrUpdateFromCoordinate, containsXY} from '../extent.js';
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import GeometryType from '../geom/GeometryType.js';
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import SimpleGeometry from '../geom/SimpleGeometry.js';
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import {deflateCoordinate} from '../geom/flat/deflate.js';
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import {squaredDistance as squaredDx} from '../math.js';
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/**
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* @classdesc
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* Point geometry.
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*
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* @constructor
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* @extends {module:ol/geom/SimpleGeometry}
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* @param {module:ol/coordinate~Coordinate} coordinates Coordinates.
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* @param {module:ol/geom/GeometryLayout=} opt_layout Layout.
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* @api
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*/
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class Point {
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constructor(coordinates, opt_layout) {
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SimpleGeometry.call(this);
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this.setCoordinates(coordinates, opt_layout);
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}
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/**
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* Make a complete copy of the geometry.
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* @return {!module:ol/geom/Point} Clone.
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* @override
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* @api
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*/
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clone() {
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const point = new Point(this.flatCoordinates.slice(), this.layout);
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return point;
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}
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/**
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* @inheritDoc
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*/
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closestPointXY(x, y, closestPoint, minSquaredDistance) {
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const flatCoordinates = this.flatCoordinates;
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const squaredDistance = squaredDx(x, y, flatCoordinates[0], flatCoordinates[1]);
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if (squaredDistance < minSquaredDistance) {
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const stride = this.stride;
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for (let i = 0; i < stride; ++i) {
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closestPoint[i] = flatCoordinates[i];
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}
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closestPoint.length = stride;
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return squaredDistance;
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} else {
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return minSquaredDistance;
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}
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}
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/**
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* Return the coordinate of the point.
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* @return {module:ol/coordinate~Coordinate} Coordinates.
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* @override
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* @api
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*/
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getCoordinates() {
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return !this.flatCoordinates ? [] : this.flatCoordinates.slice();
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}
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/**
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* @inheritDoc
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*/
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computeExtent(extent) {
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return createOrUpdateFromCoordinate(this.flatCoordinates, extent);
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}
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/**
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* @inheritDoc
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* @api
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*/
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getType() {
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return GeometryType.POINT;
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}
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/**
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* @inheritDoc
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* @api
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*/
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intersectsExtent(extent) {
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return containsXY(extent, this.flatCoordinates[0], this.flatCoordinates[1]);
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}
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/**
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* @inheritDoc
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* @api
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*/
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setCoordinates(coordinates, opt_layout) {
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this.setLayout(opt_layout, coordinates, 0);
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if (!this.flatCoordinates) {
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this.flatCoordinates = [];
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}
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this.flatCoordinates.length = deflateCoordinate(
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this.flatCoordinates, 0, coordinates, this.stride);
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this.changed();
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}
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}
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inherits(Point, SimpleGeometry);
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export default Point;
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