Renamed Terrain to TerrainTile

src/osgPlugins/ive/TerrainTile.cpp

@@ -0,0 +1,151 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2008 Robert Osfield 
+ *
+ * This library is open source and may be redistributed and/or modified under  
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
+ * OpenSceneGraph Public License for more details.
+*/
+
+#include "Exception.h"
+#include "TerrainTile.h"
+#include "Group.h"
+#include "Layer.h"
+
+#include <osgTerrain/GeometryTechnique>
+
+using namespace ive;
+
+void TerrainTile::write(DataOutputStream* out)
+{
+    // Write Terrain's identification.
+    out->writeInt(IVETERRAINTILE);
+    // If the osg class is inherited by any other class we should also write this to file.
+    osg::Group*  group = dynamic_cast<osg::Group*>(this);
+    if(group)
+        ((ive::Group*)(group))->write(out);
+    else
+        throw Exception("Terrain::write(): Could not cast this osgTerrain::Terrain to an osg::Group.");
+
+    if (out->getVersion() >= VERSION_0026)
+    {
+        out->writeInt(getTileID().layer);
+        out->writeInt(getTileID().x);
+        out->writeInt(getTileID().y);
+    }
+
+    if (out->getVersion() >= VERSION_0023)
+    {
+        out->writeLocator(getLocator());
+        out->writeLayer(getElevationLayer());
+
+        out->writeUInt(getNumColorLayers());
+        for(unsigned int i=0; i<getNumColorLayers(); ++i)
+        {
+            out->writeLayer(getColorLayer(i));
+        }
+    }
+    else
+    {
+        LayerHelper helper;
+
+        helper.writeLocator(out, getLocator());
+
+        helper.writeLayer(out, getElevationLayer());
+
+        out->writeUInt(getNumColorLayers());
+
+        for(unsigned int i=0; i<getNumColorLayers(); ++i)
+        {
+            helper.writeLayer(out, getColorLayer(i));
+        }
+    }
+        
+    writeTerrainTechnique(out, getTerrainTechnique());
+
+}
+
+void TerrainTile::read(DataInputStream* in)
+{
+    // Peek on Terrain's identification.
+    int id = in->peekInt();
+    if (id != IVETERRAINTILE) throw Exception("TerrainTile::read(): Expected Terrain identification.");
+
+    // Read Terrain's identification.
+    id = in->readInt();
+    // If the osg class is inherited by any other class we should also read this from file.
+    osg::Group*  group = dynamic_cast<osg::Group*>(this);
+    if(group)
+        ((ive::Group*)(group))->read(in);
+    else
+        throw Exception("Terrain::read(): Could not cast this osgTerrain::Terrain to an osg::Group.");
+
+    if (in->getVersion() >= VERSION_0026)
+    {
+        int layer = in->readInt();
+        int x = in->readInt();
+        int y = in->readInt();
+        setTileID(osgTerrain::TileID(layer,x,y));
+    }
+
+    if (in->getVersion() >= VERSION_0023)
+    {
+        setLocator(in->readLocator());
+        setElevationLayer(in->readLayer());
+        unsigned int numColorLayers = in->readUInt();
+        for(unsigned int i=0; i<numColorLayers; ++i)
+        {
+            setColorLayer(i, in->readLayer());
+        }        
+    }
+    else
+    {
+        LayerHelper helper;
+
+        setLocator(helper.readLocator(in));
+
+        setElevationLayer(helper.readLayer(in));
+
+        unsigned int numColorLayers = in->readUInt();
+        for(unsigned int i=0; i<numColorLayers; ++i)
+        {
+            setColorLayer(i, helper.readLayer(in));
+        }
+    }
+        
+    setTerrainTechnique(readTerrainTechnique(in));
+
+}
+
+void TerrainTile::writeTerrainTechnique(DataOutputStream* out, osgTerrain::TerrainTechnique* technique)
+{
+    if (dynamic_cast<osgTerrain::GeometryTechnique*>(technique))
+    {
+        out->writeBool(true);
+        out->writeInt(IVEGEOMETRYTECHNIQUE);
+    }
+    else
+    {
+        out->writeBool(false);
+    }
+}
+
+osgTerrain::TerrainTechnique* TerrainTile::readTerrainTechnique(DataInputStream* in)
+{
+    bool hasTechnique = in->readBool();
+    if (!hasTechnique) return 0;
+    
+    int id = in->readInt();
+    if (id==IVEGEOMETRYTECHNIQUE)
+    {
+        return new osgTerrain::GeometryTechnique;
+    }
+    else
+    {
+        return 0;
+    }
+}