127 lines
2.7 KiB
JavaScript
127 lines
2.7 KiB
JavaScript
goog.provide('ol.geom.Polygon');
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goog.require('ol.geom.Geometry');
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goog.require('ol.geom.LinearRing');
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goog.require('ol.geom.flat');
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/**
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* @constructor
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* @extends {ol.geom.Geometry}
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* @param {ol.geom.RawPolygon} coordinates Coordinates.
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* @param {ol.geom.Layout=} opt_layout Layout.
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*/
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ol.geom.Polygon = function(coordinates, opt_layout) {
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goog.base(this);
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/**
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* @type {Array.<number>}
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* @private
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*/
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this.ends_ = [];
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/**
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* @private
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* @type {number}
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*/
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this.interiorPointRevision_ = -1;
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/**
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* @private
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* @type {ol.Coordinate}
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*/
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this.interiorPoint_ = null;
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this.setCoordinates(coordinates, opt_layout);
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};
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goog.inherits(ol.geom.Polygon, ol.geom.Geometry);
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/**
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* @inheritDoc
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*/
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ol.geom.Polygon.prototype.containsXY = function(x, y) {
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return ol.geom.flat.linearRingsContainsXY(
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this.flatCoordinates, 0, this.ends_, this.stride, x, y);
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};
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/**
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* @return {number} Area.
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*/
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ol.geom.Polygon.prototype.getArea = function() {
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return ol.geom.flat.linearRingsArea(
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this.flatCoordinates, 0, this.ends_, this.stride);
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};
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/**
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* @return {ol.geom.RawPolygon} Coordinates.
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*/
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ol.geom.Polygon.prototype.getCoordinates = function() {
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return ol.geom.flat.inflateCoordinatess(
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this.flatCoordinates, 0, this.ends_, this.stride);
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};
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/**
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* @return {Array.<number>} Ends.
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*/
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ol.geom.Polygon.prototype.getEnds = function() {
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return this.ends_;
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};
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/**
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* @return {ol.Coordinate} Interior point.
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*/
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ol.geom.Polygon.prototype.getInteriorPoint = function() {
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if (this.interiorPointRevision_ != this.revision) {
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var extent = this.getExtent();
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var y = (extent[1] + extent[3]) / 2;
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this.interiorPoint_ = ol.geom.flat.linearRingsGetInteriorPoint(
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this.flatCoordinates, 0, this.ends_, this.stride, y);
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this.interiorPointRevision_ = this.revision;
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}
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return this.interiorPoint_;
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};
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/**
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* @return {Array.<ol.geom.LinearRing>} Linear rings.
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*/
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ol.geom.Polygon.prototype.getLinearRings = function() {
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var linearRings = [];
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var coordinates = this.getCoordinates();
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var i, ii;
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for (i = 0, ii = coordinates.length; i < ii; ++i) {
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linearRings.push(new ol.geom.LinearRing(coordinates[i]));
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}
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return linearRings;
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};
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/**
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* @inheritDoc
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*/
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ol.geom.Polygon.prototype.getType = function() {
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return ol.geom.Type.POLYGON;
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};
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/**
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* @param {ol.geom.RawPolygon} coordinates Coordinates.
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* @param {ol.geom.Layout=} opt_layout Layout.
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*/
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ol.geom.Polygon.prototype.setCoordinates = function(coordinates, opt_layout) {
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this.setLayout(opt_layout, coordinates, 2);
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ol.geom.flat.deflateCoordinatess(
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this.flatCoordinates, 0, coordinates, this.stride, this.ends_);
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ol.geom.flat.orientLinearRings(
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this.flatCoordinates, 0, this.ends_, this.stride);
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this.dispatchChangeEvent();
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};
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