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A centroid method vor Collections

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This commit is contained in:
Marc Jansen
2012-06-22 16:24:45 +02:00
parent 73e07df544
commit 483c431e1b
1 changed files with 22 additions and 1 deletions
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23
src/ol/geom/Collection.js
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@@ -160,9 +160,30 @@ ol.geom.Collection.prototype.isAllowedComponent = function(component){
/**
* Removes the given component from the list of components.
*
*
* @param {ol.geom.Geometry} component A component to be removed.
*/
ol.geom.Collection.prototype.removeComponent = function(component) {
goog.array.remove(this.components_, component);
};
/**
* Compute the centroid for this geometry collection.
*
* @returns {ol.geom.Point} The centroid of the collection.
*/
ol.geom.Collection.prototype.getCentroid = function() {
var components = this.getComponents(),
len = components.length,
sum_x = 0, sum_y = 0,
centroid = null;
if (len > 0) {
goog.array.forEach(components, function(component){
var singleCentroid = component.getCentroid();
sum_x += singleCentroid.getX();
sum_y += singleCentroid.getX();
});
centroid = new ol.geom.Point(sum_x / len, sum_y / len);
}
return centroid;
};