public void onSmoothHeightmap()
{
editor Editor = "Editor";
if (!this.getActiveTerrain().AsBool())
return;
// Show the dialog first and let the user
// set the smoothing parameters.
// Now create the terrain smoothing action to
// get the work done and perform later undos.
TerrainSmoothAction action = new ObjectCreator("TerrainSmoothAction").Create();
action.smooth(this.getActiveTerrain().AsString(), 1.0f, 1);
action.addToManager(Editor.getUndoManager());
}