Add ol.geom.MultiPolygon#getSimplifiedGeometryInternal

src/ol/geom/multipolygon.js

@@ -3,6 +3,7 @@ goog.provide('ol.geom.MultiPolygon');
 goog.require('ol.geom.Geometry');
 goog.require('ol.geom.Polygon');
 goog.require('ol.geom.flat');
+goog.require('ol.geom.simplify');
 
 
 
@@ -90,6 +91,24 @@ ol.geom.MultiPolygon.prototype.getInteriorPoints = function() {
 };
 
 
+/**
+ * @inheritDoc
+ */
+ol.geom.MultiPolygon.prototype.getSimplifiedGeometryInternal =
+    function(squaredTolerance) {
+  var simplifiedFlatCoordinates = [];
+  var simplifiedEndss = [];
+  simplifiedFlatCoordinates.length =
+      ol.geom.simplify.douglasPeuckerss(this.flatCoordinates, 0,
+          this.endss_, this.stride, squaredTolerance, simplifiedFlatCoordinates,
+          0, simplifiedEndss);
+  var simplifiedMultiPolygon = new ol.geom.MultiPolygon(null);
+  simplifiedMultiPolygon.setFlatCoordinates(
+      ol.geom.GeometryLayout.XY, simplifiedFlatCoordinates, simplifiedEndss);
+  return simplifiedMultiPolygon;
+};
+
+
 /**
  * @return {Array.<ol.geom.Polygon>} Polygons.
  */