From Ryan Kawicki, added removal of TXPArchive from ReaderWriterTXP when the TXPNode destructs to fix memory consumption issue relating to leaving unused archives in memory.

src/osgPlugins/txp/ReaderWriterTXP.cpp

@@ -624,6 +624,12 @@ TXPArchive *ReaderWriterTXP::getArchive(int id, const std::string& dir)
     return archive;
 }
 
+bool ReaderWriterTXP::removeArchive( int id )
+{
+    osg::notify(osg::INFO)<<"ReaderWriterTXP::removeArchive(id="<<id<<")"<<std::endl;
+    return (_archives.erase(id) >= 1);
+}
+
 class SeamFinder: public osg::NodeVisitor
 {
 public:

src/osgPlugins/txp/ReaderWriterTXP.h

@@ -73,6 +73,8 @@ public:
 
         return const_cast<ReaderWriterTXP*>(this)->local_readNode(file, options);
     }
+
+    bool removeArchive( int id );
     
 protected:
 

src/osgPlugins/txp/TXPNode.cpp

@@ -4,6 +4,8 @@
 #include <osg/Timer>
 #include <osg/MatrixTransform>
 #include <osgUtil/CullVisitor>
+#include <osgDB/Registry>
+#include <osgDB/ReaderWriter>
 
 #include <iostream>
 #include <vector>
@@ -13,7 +15,7 @@
 #include "TileMapper.h"
 #include "TXPNode.h"
 #include "TXPPagedLOD.h"
-
+#include "ReaderWriterTXP.h"
 
 
 using namespace txp;
@@ -78,6 +80,22 @@ _originY(txpNode._originY)
 
 TXPNode::~TXPNode()
 {
+   if (_archive.get())
+   {
+      if (osgDB::ReaderWriter * rw =
+          osgDB::Registry::instance()->getReaderWriterForExtension("txp"))
+      {
+         if (ReaderWriterTXP * rwTXP =
+             dynamic_cast< ReaderWriterTXP * >(rw))
+         {
+            const int id = _archive->getId();
+            if (!rwTXP->removeArchive(id))
+            {
+               TXPNodeERROR("Failed to remove archive ") << id << std::endl;
+            }
+         }
+      }
+   }
 }
 
 TXPArchive* TXPNode::getArchive()