From b12069e14c0fc04bdd9345b222e9a985b855e547 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Fri, 9 May 2008 17:08:31 +0000
Subject: [PATCH] Initial cut of file cache population app

---
 applications/CMakeLists.txt                |   1 +
 applications/osgfilecache/CMakeLists.txt   |   5 +
 applications/osgfilecache/osgfilecache.cpp | 117 +++++++++++++++++++++
 3 files changed, 123 insertions(+)
 create mode 100644 applications/osgfilecache/CMakeLists.txt
 create mode 100644 applications/osgfilecache/osgfilecache.cpp

diff --git a/applications/CMakeLists.txt b/applications/CMakeLists.txt
index 6571315c4..0e56415cc 100644
--- a/applications/CMakeLists.txt
+++ b/applications/CMakeLists.txt
@@ -30,6 +30,7 @@ ADD_SUBDIRECTORY(osgviewer)
 ADD_SUBDIRECTORY(osgarchive)
 ADD_SUBDIRECTORY(osgconv)
 ADD_SUBDIRECTORY(osgversion)
+ADD_SUBDIRECTORY(osgfilecache)
 
 #REWRITE_CMAKELIST(ADD_OSG_EXAMPLE)
 
diff --git a/applications/osgfilecache/CMakeLists.txt b/applications/osgfilecache/CMakeLists.txt
new file mode 100644
index 000000000..2857510df
--- /dev/null
+++ b/applications/osgfilecache/CMakeLists.txt
@@ -0,0 +1,5 @@
+
+SET(TARGET_SRC osgfilecache.cpp )
+
+#### end var setup  ###
+SETUP_APPLICATION(osgfilecache)
diff --git a/applications/osgfilecache/osgfilecache.cpp b/applications/osgfilecache/osgfilecache.cpp
new file mode 100644
index 000000000..2cab6b593
--- /dev/null
+++ b/applications/osgfilecache/osgfilecache.cpp
@@ -0,0 +1,117 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield 
+ *
+ * This application is open source and may be redistributed and/or modified   
+ * freely and without restriction, both in commericial and non commericial applications,
+ * as long as this copyright notice is maintained.
+ * 
+ * This application 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.
+*/
+
+#include <osg/Timer>
+#include <osg/ArgumentParser>
+#include <osg/ApplicationUsage>
+
+#include <osgDB/Archive>
+#include <osgDB/ReadFile>
+#include <osgDB/WriteFile>
+#include <osgDB/FileUtils>
+
+#include <iostream>
+#include <algorithm>
+
+class LoadDataVisitor : public osg::NodeVisitor
+{
+public:
+
+    LoadDataVisitor(unsigned int maxNumLevels=0):
+        osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
+        _maxLevels(maxNumLevels),
+        _currentLevel(0) {}
+        
+    void apply(osg::PagedLOD& plod)
+    {
+        if (_currentLevel>_maxLevels) return;
+    
+        ++_currentLevel;
+    
+        std::cout<<"Found PagedLOD "<<plod.getNumFileNames()<<std::endl;
+        for(unsigned int i=0; i<plod.getNumFileNames(); ++i)
+        {
+            std::cout<<"   filename["<<i<<"] "<<plod.getFileName(i)<<std::endl;
+            if (!plod.getFileName(i).empty())
+            {
+                std::string filename;
+                if (!plod.getDatabasePath().empty()) 
+                {
+                    filename = plod.getDatabasePath() + plod.getFileName(i);
+                }
+                else
+                {
+                    filename = plod.getFileName(i);
+                }
+                
+                std::cout<<"   reading "<<filename<<std::endl;
+                
+                osg::ref_ptr<osg::Node> node = osgDB::readNodeFile(filename);
+                
+                if (node.valid()) node->accept(*this);
+            }
+        }
+
+        --_currentLevel;
+    }
+    
+protected:
+
+    unsigned int _maxLevels;
+    unsigned int _currentLevel;
+};
+
+
+int main( int argc, char **argv )
+{
+    // use an ArgumentParser object to manage the program arguments.
+    osg::ArgumentParser arguments(&argc,argv);
+    
+    // set up the usage document, in case we need to print out how to use this program.
+    arguments.getApplicationUsage()->setApplicationName(arguments.getApplicationName());
+    arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" is an application for collecting a set of seperate files into a single archive file that can be later read in OSG applications..");
+    arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" [options] filename ...");
+        
+    // if user request help write it out to cout.
+    if (arguments.read("-h") || arguments.read("--help"))
+    {
+        arguments.getApplicationUsage()->write(std::cout);
+        return 1;
+    }
+    
+    unsigned int maxLevels = 0;
+    while(arguments.read("-l",maxLevels)) {}
+    
+    std::string fileCache;
+    while(arguments.read("-c",fileCache)) {}
+    
+    if (!fileCache.empty())
+    {   
+        std::string str("OSG_FILE_CACHE=");
+        str += fileCache;
+        
+        putenv(strdup((char*)str.c_str()));
+    }
+
+    osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFiles(arguments);
+    if (!loadedModel)
+    {
+        std::cout<<"No data loaded, please specify a database to load"<<std::endl;
+        return 1;
+    }
+    
+    LoadDataVisitor ldv(maxLevels);
+    
+    loadedModel->accept(ldv);
+
+    return 0;
+}
+