Introduce TerrainSystem node which decorates a complete terrain model made up of Terrain tiles.

examples/osgmultitexturecontrol/osgmultitexturecontrol.cpp

@@ -38,6 +38,8 @@
 #include <osgGA/AnimationPathManipulator>
 #include <osgGA/TerrainManipulator>
 
+#include <osgTerrain/TerrainSystem>
+
 #include <osgViewer/ViewerEventHandlers>
 #include <osgViewer/Viewer>
 
@@ -196,6 +198,15 @@ int main( int argc, char **argv )
         return 1;
     }
     
+    osgTerrain::TerrainSystem* terrain = findTopMostNodeOfType<osgTerrain::TerrainSystem>(rootnode);
+    if (!terrain)
+    {
+        terrain = new osgTerrain::TerrainSystem;
+        terrain->addChild(rootnode);
+        
+        rootnode = terrain;
+    }    
+    
     osg::CoordinateSystemNode* csn = findTopMostNodeOfType<osg::CoordinateSystemNode>(rootnode);
 
     unsigned int numLayers = 1;