Added OpenDX writer from Randall Hopper.

src/osgPlugins/dx/ReaderWriterDX.cpp

@@ -0,0 +1,79 @@
+// This plugin writes an IBM Data Explorer (aka OpenDX) native file.
+// (c) Randall Hopper, 2002.
+//
+// For details on the OpenDX visualization tool, its use, and its file format,
+//   refer to:
+//
+//   http://www.opendx.org/
+//   http://www.opendx.org/support.html#docs
+//   http://www.research.ibm.com/dx/
+//   http://ftp.cs.umt.edu/DX/
+//
+// SUPPORTED  : Refer to DXWriter.cpp
+// UNSUPPORTED: Refer to DXWriter.cpp
+//
+
+// ReaderWriterDX.cpp
+
+#include <iostream>
+#include <string.h>
+#include <osg/Notify>
+#include "ReaderWriterDX.h"
+#include "DXWriter.h"
+
+// FIXME:  Support options
+osgDB::ReaderWriter::WriteResult ReaderWriterDX::writeObject( 
+                                       const osg::Object &obj,
+                                       const std::string &filename,
+                                       const Options     *options )
+{ 
+  const osg::Node *node = dynamic_cast<const osg::Node *>(&obj);
+
+  if ( node != 0 )
+    return writeNode( *node, filename, options );
+  else
+    // FIXME:  This should probably be "OBJECT_NOT_HANDLED"
+    return osgDB::ReaderWriter::WriteResult::FILE_NOT_HANDLED;
+}
+
+
+osgDB::ReaderWriter::WriteResult ReaderWriterDX::writeNode( 
+                                       const osg::Node   &node,
+                                       const std::string &filename,
+                                       const Options     *options )
+{
+  dx::WriterParms parms;
+  std::string     messages;
+  bool            ret;
+  osgDB::ReaderWriter::WriteResult result;
+
+  std::string ext = osgDB::getFileExtension(filename);
+  if (!acceptsExtension(ext)) return WriteResult::FILE_NOT_HANDLED;
+
+  parms.outfile[0] = '\0';
+  strncat( parms.outfile, filename.c_str(), sizeof(parms.outfile)-1 );
+
+  // FIXME:  Allow specification via Options
+  parms.set_default_color = 1;
+  parms.default_color[0] = 
+    parms.default_color[1] = 
+    parms.default_color[2] = 0.75;
+  parms.default_color[3] = 1.0;     // opaque light gray
+
+  ret = dx::WriteDX( node, parms, messages );
+
+  if ( ret )
+    result = osgDB::ReaderWriter::WriteResult( 
+                osgDB::ReaderWriter::WriteResult::FILE_SAVED );
+  else
+    result = osgDB::ReaderWriter::WriteResult( messages );
+
+  osg::notify( osg::DEBUG_INFO ) << messages;
+
+  return result;
+}
+
+
+// now register with Registry to instantiate the above
+// reader/writer.
+osgDB::RegisterReaderWriterProxy<ReaderWriterDX> g_dxReaderWriterProxy;