Change Terrain so that it subclassed from CoordinateSystemNode.

Implemented new update scheme of GeometryTechnique to avoid potential threading issues.

Added Terrain support to .ive.

include/osgTerrain/GeometryTechnique

@@ -34,7 +34,7 @@ class OSGTERRAIN_EXPORT GeometryTechnique : public TerrainTechnique
         
         META_Object(osgTerrain, GeometryTechnique);
         
-        virtual void init();
+        virtual void init(int dirtyMask, bool assumeMultiThreaded);
         
         virtual Locator* computeMasterLocator();
         

include/osgTerrain/Terrain

@@ -14,7 +14,6 @@
 #ifndef OSGTerrain
 #define OSGTerrain 1
 
-#include <osg/Group>
 #include <osg/CoordinateSystemNode>
 
 #include <osgTerrain/TerrainTile>
@@ -23,7 +22,7 @@ namespace osgTerrain {
 
 /** Terrain provides a framework for loosely coupling height field data with height rendering algorithms.
   * This allows TerrainTechniques to be plugged in at runtime.*/
-class OSGTERRAIN_EXPORT Terrain : public osg::Group
+class OSGTERRAIN_EXPORT Terrain : public osg::CoordinateSystemNode
 {
     public:
 

include/osgTerrain/TerrainTechnique

@@ -63,7 +63,7 @@ class OSGTERRAIN_EXPORT TerrainTechnique : public osg::Object, public osg::Obser
         TerrainTile* getTerrainTile() { return _terrainTile; }
         const TerrainTile* getTerrainTile() const { return _terrainTile; }
 
-        virtual void init();
+        virtual void init(int dirtyMask, bool assumeMultiThreaded);
 
         virtual void update(osgUtil::UpdateVisitor* nv);
 

include/osgTerrain/TerrainTile

@@ -78,8 +78,7 @@ class OSGTERRAIN_EXPORT TerrainTile : public osg::Group
         virtual void traverse(osg::NodeVisitor& nv);
 
         /** Call init on any attached TerrainTechnique.*/
-        void init();
-
+        void init(int dirtyMask, bool assumeMultiThreaded);
 
         /** Set the Terrain that this Terrain tile is a member of.*/
         void setTerrain(Terrain* ts);