Added initial cut at support for osgVolume in .ive format.

2009-05-05 18:34:44 +00:00
parent 1515b8d357
commit 2b09b0dffa
19 changed files with 821 additions and 6 deletions
--- a/src/osgPlugins/ive/VolumeTile.cpp
+++ b/src/osgPlugins/ive/VolumeTile.cpp
@@ -0,0 +1,100 @@
+/* -*-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 "VolumeTile.h"
+#include "Group.h"
+#include "VolumeLayer.h"
+
+#include <osgVolume/RayTracedTechnique>
+#include <osgVolume/FixedFunctionTechnique>
+
+using namespace ive;
+
+void VolumeTile::write(DataOutputStream* out)
+{
+    // Write VolumeTile's identification.
+    out->writeInt(IVEVOLUMETILE);
+    // 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("VolumeTile::write(): Could not cast this osgVolume::VolumeTile to an osg::Group.");
+
+
+    out->writeVolumeLocator(getLocator());
+    out->writeVolumeLayer(getLayer());
+
+    writeVolumeTechnique(out, getVolumeTechnique());
+
+}
+
+void VolumeTile::read(DataInputStream* in)
+{
+    // Peek on VolumeTile's identification.
+    int id = in->peekInt();
+    if (id != IVEVOLUMETILE) throw Exception("VolumeTile::read(): Expected Volume identification.");
+
+    // Read VolumeTile'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("VolumeTile::read(): Could not cast this osgVolume::VolumeTile to an osg::Group.");
+
+    setLocator(in->readVolumeLocator());
+    setLayer(in->readVolumeLayer());
+
+    setVolumeTechnique(readVolumeTechnique(in));
+}
+
+void VolumeTile::writeVolumeTechnique(DataOutputStream* out, osgVolume::VolumeTechnique* technique)
+{
+    if (dynamic_cast<osgVolume::RayTracedTechnique*>(technique))
+    {
+        out->writeBool(true);
+        out->writeInt(IVEVOLUMERAYTRACEDTECHNIQUE);
+    }
+    if (dynamic_cast<osgVolume::FixedFunctionTechnique*>(technique))
+    {
+        out->writeBool(true);
+        out->writeInt(IVEVOLUMEFIXEDPIPELINETECHNIQUE);
+    }
+    else
+    {
+        out->writeBool(false);
+    }
+}
+
+osgVolume::VolumeTechnique* VolumeTile::readVolumeTechnique(DataInputStream* in)
+{
+    bool hasTechnique = in->readBool();
+    if (!hasTechnique) return 0;
+    
+    int id = in->readInt();
+    if (id==IVEVOLUMERAYTRACEDTECHNIQUE)
+    {
+        return new osgVolume::RayTracedTechnique;
+    }
+    else if (id==IVEVOLUMEFIXEDPIPELINETECHNIQUE)
+    {
+        return new osgVolume::FixedFunctionTechnique;
+    }
+    else
+    {
+        return 0;
+    }
+}