94 lines
1.8 KiB
JavaScript
94 lines
1.8 KiB
JavaScript
goog.provide('ol.geom.Point');
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goog.require('goog.asserts');
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goog.require('ol.Coordinate');
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goog.require('ol.geom.Geometry');
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goog.require('ol.geom.GeometryType');
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/**
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* @constructor
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* @extends {ol.geom.Geometry}
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* @param {ol.Coordinate} coordinates Coordinate values (e.g. `[x, y]`).
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* @todo stability experimental
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*/
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ol.geom.Point = function(coordinates) {
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goog.base(this);
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/**
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* Point coordinate values.
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* @type {ol.Coordinate}
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* @private
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*/
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this.coordinates_ = coordinates;
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/**
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* @type {ol.Extent}
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* @private
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*/
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this.bounds_ = null;
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};
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goog.inherits(ol.geom.Point, ol.geom.Geometry);
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/**
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* @param {number} dim Coordinate dimension.
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* @return {number} The coordinate value.
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*/
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ol.geom.Point.prototype.get = function(dim) {
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return this.getCoordinates()[dim];
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};
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/**
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* @inheritDoc
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*/
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ol.geom.Point.prototype.getBounds = function() {
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if (goog.isNull(this.bounds_)) {
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var x = this.get(0),
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y = this.get(1);
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this.bounds_ = [x, y, x, y];
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}
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return this.bounds_;
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};
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/**
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* @inheritDoc
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* @return {ol.Coordinate} Coordinates array.
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*/
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ol.geom.Point.prototype.getCoordinates = function() {
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return this.coordinates_;
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};
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/**
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* @inheritDoc
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*/
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ol.geom.Point.prototype.getType = function() {
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return ol.geom.GeometryType.POINT;
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};
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/**
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* Update the point coordinates.
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* @param {ol.Coordinate} coordinates Coordinates array.
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*/
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ol.geom.Point.prototype.setCoordinates = function(coordinates) {
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this.bounds_ = null;
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this.coordinates_ = coordinates;
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this.dispatchChangeEvent();
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};
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/**
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* @inheritDoc
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*/
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ol.geom.Point.prototype.transform = function(transform) {
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var coordinates = this.getCoordinates();
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transform(coordinates, coordinates, coordinates.length);
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this.setCoordinates(coordinates); // for invalidating bounds
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};
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