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121 lines
3.0 KiB
121 lines
3.0 KiB
/**
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* @module ol/geom/Point
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*/
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import SimpleGeometry from './SimpleGeometry.js';
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import {containsXY, createOrUpdateFromCoordinate} from '../extent.js';
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import {deflateCoordinate} from './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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* @api
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*/
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class Point extends SimpleGeometry {
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/**
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* @param {import("../coordinate.js").Coordinate} coordinates Coordinates.
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* @param {import("./Geometry.js").GeometryLayout} [layout] Layout.
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*/
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constructor(coordinates, layout) {
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super();
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this.setCoordinates(coordinates, 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 {!Point} Clone.
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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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point.applyProperties(this);
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return point;
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}
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/**
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* @param {number} x X.
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* @param {number} y Y.
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* @param {import("../coordinate.js").Coordinate} closestPoint Closest point.
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* @param {number} minSquaredDistance Minimum squared distance.
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* @return {number} Minimum squared distance.
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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(
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x,
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y,
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flatCoordinates[0],
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flatCoordinates[1]
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);
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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 {import("../coordinate.js").Coordinate} Coordinates.
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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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* @param {import("../extent.js").Extent} extent Extent.
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* @protected
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* @return {import("../extent.js").Extent} extent Extent.
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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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* Get the type of this geometry.
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* @return {import("./Geometry.js").Type} Geometry type.
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* @api
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*/
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getType() {
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return 'Point';
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}
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/**
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* Test if the geometry and the passed extent intersect.
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* @param {import("../extent.js").Extent} extent Extent.
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* @return {boolean} `true` if the geometry and the extent intersect.
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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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* @param {!Array<*>} coordinates Coordinates.
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* @param {import("./Geometry.js").GeometryLayout} [layout] Layout.
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* @api
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*/
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setCoordinates(coordinates, layout) {
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this.setLayout(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,
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0,
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coordinates,
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this.stride
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);
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this.changed();
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}
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}
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export default Point;
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