ashatora/openlayers
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Cache ol.geom.Polygon interior point

Browse Source
This commit is contained in:
Tom Payne
2013-12-01 18:29:45 +01:00
parent c0a50ce24b
commit 72df83251d
1 changed files with 20 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
src/ol/geom/polygon.js
View File

@@ -22,6 +22,18 @@ ol.geom.Polygon = function(coordinates, opt_layout) {
*/
this.ends_ = [];
/**
* @private
* @type {number}
*/
this.interiorPointRevision_ = -1;
/**
* @private
* @type {ol.Coordinate}
*/
this.interiorPoint_ = null;
this.setCoordinates(coordinates, opt_layout);
};
@@ -58,10 +70,14 @@ ol.geom.Polygon.prototype.getEnds = function() {
* @return {ol.Coordinate} Interior point.
*/
ol.geom.Polygon.prototype.getInteriorPoint = function() {
var extent = this.getExtent();
var y = (extent[1] + extent[3]) / 2;
return ol.geom.flat.linearRingsGetInteriorPoint(
this.flatCoordinates, 0, this.ends_, this.stride, y);
if (this.interiorPointRevision_ != this.revision) {
var extent = this.getExtent();
var y = (extent[1] + extent[3]) / 2;
this.interiorPoint_ = ol.geom.flat.linearRingsGetInteriorPoint(
this.flatCoordinates, 0, this.ends_, this.stride, y);
this.interiorPointRevision_ = this.revision;
}
return this.interiorPoint_;
};