Add ol.geom.MultiPolygon#appendPolygon

src/ol/geom/multipolygon.exports

@@ -1,4 +1,5 @@
 @exportSymbol ol.geom.MultiPolygon
+@exportProperty ol.geom.MultiPolygon.prototype.appendPolygon
 @exportProperty ol.geom.MultiPolygon.prototype.clone
 @exportProperty ol.geom.MultiPolygon.prototype.getArea
 @exportProperty ol.geom.MultiPolygon.prototype.getCoordinates

src/ol/geom/multipolygon.js

@@ -72,6 +72,31 @@ ol.geom.MultiPolygon = function(coordinates, opt_layout) {
 goog.inherits(ol.geom.MultiPolygon, ol.geom.SimpleGeometry);
 
 
+/**
+ * @param {ol.geom.Polygon} polygon Polygon.
+ */
+ol.geom.MultiPolygon.prototype.appendPolygon = function(polygon) {
+  goog.asserts.assert(polygon.getLayout() == this.layout);
+  /** @type {Array.<number>} */
+  var ends;
+  if (goog.isNull(this.flatCoordinates)) {
+    this.flatCoordinates = polygon.getFlatCoordinates().slice();
+    ends = polygon.getEnds().slice();
+    this.endss_.push();
+  } else {
+    var offset = this.flatCoordinates.length;
+    goog.array.extend(this.flatCoordinates, polygon.getFlatCoordinates());
+    ends = polygon.getEnds().slice();
+    var i, ii;
+    for (i = 0, ii = ends.length; i < ii; ++i) {
+      ends[i] += offset;
+    }
+  }
+  this.endss_.push(ends);
+  this.dispatchChangeEvent();
+};
+
+
 /**
  * @inheritDoc
  */