Added support for decoration of the osgTerrain::DataSet generated databases

with a CoordinateSystemNode which reflect the coordinate system of the
database.

Added support for reading and writing CoordianteSystemNode into the .osg
and .ive formats.

src/osgPlugins/ive/EllipsoidModel.cpp

@@ -0,0 +1,62 @@
+/**********************************************************************
+ *
+ *    FILE:            EllipsoidModel.cpp
+ *
+ *    DESCRIPTION:    Read/Write osg::EllipsoidModel in binary format to disk.
+ *
+ *    CREATED BY:        Auto generated by iveGenerator
+ *                    and later modified by Rune Schmidt Jensen.
+ *
+ *    HISTORY:        Created 23.4.2003
+ *
+ *    Copyright 2003 VR-C
+ **********************************************************************/
+
+#include "Exception.h"
+#include "Object.h"
+#include "EllipsoidModel.h"
+#include "ConvexPlanarPolygon.h"
+
+using namespace ive;
+
+void EllipsoidModel::write(DataOutputStream* out){
+    // Write EllipsoidModel's identification.
+    out->writeInt(IVEELLIPSOIDMODEL);
+    // If the osg class is inherited by any other class we should also write this to file.
+    osg::Object*  obj = dynamic_cast<osg::Object*>(this);
+    if(obj){
+        ((ive::Object*)(obj))->write(out);
+    }
+    else
+        throw Exception("EllipsoidModel::write(): Could not cast this osg::EllipsoidModel to an osg::Object.");
+    // Write EllipsoidModel's properties.
+
+    out->writeDouble(getRadiusEquator());
+    out->writeDouble(getRadiusPolar());
+
+}
+
+void EllipsoidModel::read(DataInputStream* in){
+    // Peek on EllipsoidModel's identification.
+    int id = in->peekInt();
+    if(id == IVEELLIPSOIDMODEL){
+        // Read EllipsoidModel's identification.
+        id = in->readInt();
+        // If the osg class is inherited by any other class we should also read this from file.
+        osg::Object*  obj = dynamic_cast<osg::Object*>(this);
+        if(obj){
+            ((ive::Object*)(obj))->read(in);
+        }
+        else
+            throw Exception("EllipsoidModel::read(): Could not cast this osg::EllipsoidModel to an osg::Object.");
+        // Read EllipsoidModel's properties
+
+        setRadiusEquator(in->readDouble());
+        setRadiusPolar(in->readDouble());
+        
+
+    }
+    else{
+        throw Exception("EllipsoidModel::read(): Expected EllipsoidModel identification.");
+    }
+}