Added new osg::ApplicationUsage and osg::ArgumentParser to help streamline

application/example developement.

Make/makedirdefs

@@ -13,6 +13,7 @@ SRC_DIRS = \
 	osgGA\
 	osgParticle\
 	osgGLUT\
+	osgProducer\
 	osgText\
 	osgSim\
 	osgPlugins\
@@ -94,6 +95,7 @@ DEMOS_DIRS = \
 	osgoccluder\
 	osgparticle\
 	osgprerender\
+	osgproducer\
 	osgshadowtexture\
 	osgreflect\
 	osgscribe\

VisualStudio/osg/osg.dsp

@@ -101,6 +101,14 @@ SOURCE=..\..\src\osg\AnimationPath.cpp
 # End Source File
 # Begin Source File
 
+SOURCE=..\..\src\osg\ArgumentParser.cpp
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\src\osg\ApplicationUsage.cpp
+# End Source File
+# Begin Source File
+
 SOURCE=..\..\src\osg\Array.cpp
 # End Source File
 # Begin Source File
@@ -457,6 +465,14 @@ SOURCE=..\..\Include\Osg\Array
 # End Source File
 # Begin Source File
 
+SOURCE=..\..\Include\osg\ArgumentParser
+# End Source File
+# Begin Source File
+
+SOURCE=..\..\Include\osg\ApplicationUsage
+# End Source File
+# Begin Source File
+
 SOURCE=..\..\Include\Osg\Billboard
 # End Source File
 # Begin Source File

VisualStudio/osgText/osgText.dsp

@@ -53,7 +53,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /dll /machine:I386
-# ADD LINK32 freetype213.lib glu32.lib opengl32.lib /nologo /dll /pdb:none /machine:I386 /out:"../../bin/osgText.dll" /libpath:"../../lib"
+# ADD LINK32 freetype.lib glu32.lib opengl32.lib /nologo /dll /pdb:none /machine:I386 /out:"../../bin/osgText.dll" /libpath:"../../lib"
 
 !ELSEIF  "$(CFG)" == "Core osgText - Win32 Debug"
 
@@ -79,7 +79,7 @@ BSC32=bscmake.exe
 # ADD BSC32 /nologo
 LINK32=link.exe
 # ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /dll /debug /machine:I386 /pdbtype:sept
-# ADD LINK32 freetype213.lib glu32.lib opengl32.lib /nologo /dll /debug /machine:I386 /out:"../../bin/osgTextd.dll" /pdbtype:sept /libpath:"../../lib"
+# ADD LINK32 freetype.lib glu32.lib opengl32.lib /nologo /dll /debug /machine:I386 /out:"../../bin/osgTextd.dll" /pdbtype:sept /libpath:"../../lib"
 # SUBTRACT LINK32 /pdb:none
 
 !ENDIF 

include/osg/ApplicationUsage

@@ -0,0 +1,93 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 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.
+*/
+
+#ifndef OSG_APPLICATIONUSAGE
+#define OSG_APPLICATIONUSAGE 1
+
+#include <osg/Export>
+
+#include <map>
+#include <string>
+#include <iostream>
+
+namespace osg {
+
+class SG_EXPORT ApplicationUsage
+{
+    public:
+        
+        static ApplicationUsage* instance();
+
+        ApplicationUsage() {}
+
+        ApplicationUsage(const std::string& commandLineUsage);
+
+        typedef std::map<std::string,std::string> UsageMap;
+        
+        enum Type
+        {
+            COMMAND_LINE_OPTION,
+            ENVIRONMENTAL_VARIABLE,
+            KEYBOARD_MOUSE_BINDING
+        };
+        
+        void addUsageExplanation(Type type,const std::string& option,const std::string& explanation);
+        
+        void setCommandLineUsage(const std::string& explanation) { _commandLineUsage=explanation; }
+
+        const std::string& getCommandLineUsage() const { return _commandLineUsage; }
+
+
+        void addCommandLineOption(const std::string& option,const std::string& explanation);
+        
+        const UsageMap& getCommandLineOptions() const { return _commandLineOptions; }
+
+
+        void addEnvironmentalVariable(const std::string& option,const std::string& explanation);
+        
+        const UsageMap& getEnvironmentalVariables() const { return _environmentalVariables; }
+
+
+        void addKeyboardMouseBinding(const std::string& option,const std::string& explanation);
+
+        const UsageMap& getKeyboardMouseBindings() const { return _keyboardMouse; }
+
+
+        void write(std::ostream& output,const UsageMap& um,unsigned int widthOfOutput=80);
+        
+        void write(std::ostream& output,unsigned int widthOfOutput=80);
+
+    protected:
+    
+
+        std::string _commandLineUsage;
+        UsageMap    _commandLineOptions;
+        UsageMap    _environmentalVariables;
+        UsageMap    _keyboardMouse;
+        
+};
+
+class ApplicationUsageProxy
+{   
+    public:
+
+        /** register an explanation of commandline/evironmentalvaraible/keyboard mouse usage.*/
+        ApplicationUsageProxy(ApplicationUsage::Type type,const std::string& option,const std::string& explanation)
+        {
+            ApplicationUsage::instance()->addUsageExplanation(type,option,explanation);
+        }
+};
+
+}
+
+#endif

include/osg/ArgumentParser

@@ -0,0 +1,142 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 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.
+*/
+
+#ifndef OSG_ARGUMENTPARSER
+#define OSG_ARGUMENTPARSER 1
+
+#include <osg/Export>
+
+#include <string>
+#include <map>
+
+namespace osg {
+
+class SG_EXPORT ArgumentParser
+{
+    public:
+        ArgumentParser(int* argc,char **argv):
+            _argc(argc),
+            _argv(argv) {}
+            
+        /** return the argument count.*/
+        int& argc() { return *_argc; }
+
+        /** return the argument array.*/
+        char** argv() { return _argv; }
+
+        /** return char* argument at specificed position.*/
+        char* operator [] (int pos) { return _argv[pos]; }
+
+        /** return const char* argument at specificed position.*/
+        const char* operator [] (int pos) const { return _argv[pos]; }
+
+  
+        
+        /** return the program name, as specified by argv[0] */
+        std::string getProgramName() const;
+
+        /** return the position of an occurance of a string in the argument list.
+          * return -1 when no string is found.*/      
+        int find(const std::string& str) const;
+
+        /** return true if specified argument matches string.*/        
+        bool match(int pos, const std::string& str) const;
+
+        /** return return true if specified parameter is an option in the form of -option or --option .*/
+        bool isOption(int pos) const;
+        
+        /** return return true if specified parameter is an string, which can be any other string apart from an option.*/
+        bool isString(int pos) const;
+        
+        /** return return true if specified parameter is an number.*/
+        bool isNumber(int pos) const;
+        
+        bool containsOptions() const;
+
+        /** remove one or more arguments from the argv argument list, and decrement the argc respectively.*/
+        void remove(int pos,int num=1);
+        
+        /** search for an occurance of a string in the argument list, on sucess
+          * remove that occurance from the list and return true, otherwise return false.*/
+        bool read(const std::string& str);
+
+        /** search for an occurance of a string in the argument list followed by a string,
+          * on sucess set the value string with the second parameters and then
+          * remove the two entries from the list and return true, otherwise return false.*/
+        bool read(const std::string& str,std::string& value1);
+
+        /** search for an occurance of a string in the argument list followed by a two strings,
+          * on sucess set the value strings with the second & third parameters and then
+          * remove the three entries from the list and return true, otherwise return false.*/
+        bool read(const std::string& str,std::string& value1,std::string& value2);
+
+        /** search for an occurance of a string in the argument list followed by a three strings,
+          * on sucess set the value strings with the second & third & fourth parameters and then
+          * remove the four entries from the list and return true, otherwise return false.*/
+        bool read(const std::string& str,std::string& value1,std::string& value2,std::string& value3);
+        
+        
+        /** search for an occurance of a string in the argument list followed by a numeric value,
+          * on sucess set the values with the second parameter and then
+          * remove the two entries from the list and return true, otherwise return false.*/
+        bool read(const std::string& str,float& value);
+
+        /** search for an occurance of a string in the argument list followed by two numeric values,
+          * on sucess set the values with the second & third parameters and then
+          * remove the three entries from the list and return true, otherwise return false.*/
+        bool read(const std::string& str,float& value1,float& value2);
+
+        /** search for an occurance of a string in the argument list followed by three numeric values,
+          * on sucess set the values with the second & third & fourth parameters and then
+          * remove the four entries from the list and return true, otherwise return false.*/
+        bool read(const std::string& str,float& value1,float& value2,float& value3);
+
+
+        enum ErrorSeverity
+        {
+            BENIGN = 0,
+            CRITICAL = 1
+        };
+
+        typedef std::map<std::string,ErrorSeverity> ErrorMessageMap;
+
+        /** return the error flag, true if an error has occured when reading arguments.*/
+        bool errors(ErrorSeverity severity=BENIGN) const;
+
+        /** report an error message by adding to the ErrorMessageMap.*/
+        void reportError(const std::string& message,ErrorSeverity severity=CRITICAL);
+
+        /** for each remaining option report it as an unrecongnized.*/
+        void reportRemainingOptionsAsUnrecognized(ErrorSeverity severity=BENIGN);
+        
+        /** return the error message, if any has occured.*/
+        ErrorMessageMap& getErrorMessageMap() { return _errorMessageMap; }
+      
+        /** return the error message, if any has occured.*/
+        const ErrorMessageMap& getErrorMessageMap() const { return _errorMessageMap; }
+
+        /** write out error messages at an above specified .*/
+        void writeErrorMessages(std::ostream& output,ErrorSeverity sevrity=BENIGN);
+
+  
+  protected:
+        
+        int*            _argc;
+        char**          _argv;
+        ErrorMessageMap _errorMessageMap;
+        
+};
+
+}
+
+#endif

include/osg/DisplaySettings

@@ -15,6 +15,7 @@
 #define OSG_DisplaySettings 1
 
 #include <osg/Referenced>
+#include <osg/ArgumentParser>
 
 #include <string>
 #include <vector>
@@ -59,6 +60,9 @@ class SG_EXPORT DisplaySettings : public osg::Referenced
 
         /** read the command line string list, removing any matched control sequences.*/
         void readCommandLine(std::vector<std::string>& commandLine);
+
+        /** read the commandline arguments.*/
+        void readCommandLine(ArgumentParser& parser);
         
         
 

include/osgDB/ReadFile

@@ -16,6 +16,7 @@
 
 #include <osg/Node>
 #include <osg/Image>
+#include <osg/ArgumentParser>
 
 #include <osgDB/Export>
 
@@ -51,6 +52,10 @@ extern OSGDB_EXPORT osg::Node*  readNodeFile(const std::string& filename);
   * than one subgraph has been loaded.*/
 extern OSGDB_EXPORT osg::Node* readNodeFiles(std::vector<std::string>& commandLine);
 
+/** Read an osg::Node subgraph from files, creating a osg::Group to contain the nodes if more
+  * than one subgraph has been loaded.*/
+extern OSGDB_EXPORT osg::Node* readNodeFiles(osg::ArgumentParser& parser);
+
 }
 
 #endif

include/osgDB/Registry

@@ -15,6 +15,7 @@
 #define OSGDB_REGISTRY 1
 
 #include <osg/ref_ptr>
+#include <osg/ArgumentParser>
 
 #include <osgDB/DynamicLibrary>
 #include <osgDB/ReaderWriter>
@@ -53,6 +54,9 @@ class OSGDB_EXPORT Registry : public osg::Referenced
         /** read the command line string list, removing any matched control sequences.*/
         void readCommandLine(std::vector<std::string>& commandLine);
 
+        /** read the command line arguments.*/
+        void readCommandLine(osg::ArgumentParser& commandLine);
+
         /** register an .fileextension alias to mapExt toExt, the later
 	  * should the the extension name of the readerwriter plugin library.
 	  * For example to map .tif files to the tiff loader, use
@@ -203,6 +207,12 @@ inline void readCommandLine(std::vector<std::string>& commandLine)
     Registry::instance()->readCommandLine(commandLine);
 }
 
+/** read the command line arguments.*/
+inline void readCommandLine(osg::ArgumentParser& parser)
+{
+    Registry::instance()->readCommandLine(parser);
+}
+
 /**  Proxy class for automatic registration of DotOsgWrappers with the Registry.*/
 class RegisterDotOsgWrapperProxy
 {

include/osgProducer/CameraGroup

@@ -17,6 +17,7 @@
 
 #include <Producer/CameraGroup>
 
+#include <osg/ArgumentParser>
 #include <osg/Group>
 #include <osg/StateSet>
 #include <osg/FrameStamp>
@@ -38,6 +39,8 @@ class OSGPRODUCER_EXPORT CameraGroup : public Producer::CameraGroup
 
         CameraGroup(const std::string& configFile);
 
+        CameraGroup(osg::ArgumentParser& arguments);
+
         virtual ~CameraGroup() {}
 
 

include/osgProducer/FrameStatsHandler

@@ -1,10 +1,27 @@
-#ifndef FRAME_STATS_HANDLER
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 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.
+*/
+
+#ifndef OSGPRODUCER_FRAME_STATS_HANDLER
+#define OSGPRODUCER_FRAME_STATS_HANDLER 1
+
+#include <Producer/CameraGroup>
+
 #include <stdio.h>
 #include <GL/gl.h>
 
-namespace Producer {
+namespace osgProducer {
 
-class FrameStatsHandler : public CameraGroup::StatsHandler, public Camera::Callback
+class FrameStatsHandler : public Producer::CameraGroup::StatsHandler, public Producer::Camera::Callback
 {
     public:
 	FrameStatsHandler() 
@@ -14,15 +31,16 @@ class FrameStatsHandler : public CameraGroup::StatsHandler, public Camera::Callb
 	}
 
 	void setArraySize(unsigned int size) { _fs.resize(size); }
+
 	unsigned int getArraySize() { return _fs.size(); }
 
-        void operator() (const CameraGroup &cg )
+        void operator() (const Producer::CameraGroup &cg )
         {
 	    _index = (_index + 1) % _fs.size();
             _fs[_index] = cg.getFrameStats();     
         }
 
-	void operator() (const Camera &camera)
+	void operator() (const Producer::Camera &camera)
         {
             if (!camera.getInstrumentationMode()) return;
 
@@ -43,10 +61,10 @@ class FrameStatsHandler : public CameraGroup::StatsHandler, public Camera::Callb
 	    glLoadIdentity();
 
             unsigned int lindex = (_index + 1) % _fs.size();
-            Camera::TimeStamp zero = _fs[lindex]._startOfFrame;
+            Producer::Camera::TimeStamp zero = _fs[lindex]._startOfFrame;
-            int i;
+            unsigned int i;
-	    double x1, x2, y1, y2;
+	    double x1=0.0, x2=0.0, y1=0.0, y2=0.0;
-	    for( int frame = 0; frame < _fs.size(); frame++ )
+	    for(unsigned int frame = 0; frame < _fs.size(); frame++ )
 	    {
 		CameraGroup::FrameStats fs = _fs[(lindex + frame) % _fs.size()];
 	        y1 = 0.0;
@@ -65,11 +83,11 @@ class FrameStatsHandler : public CameraGroup::StatsHandler, public Camera::Callb
 
 	        for( i = 0; i < fs.getNumFrameTimeStampSets(); i++ )
                 {
-		    Camera::FrameTimeStampSet fts = fs.getFrameTimeStampSet(i);
+		    Producer::Camera::FrameTimeStampSet fts = fs.getFrameTimeStampSet(i);
 	            y1 += 13.0;
 	            y2 = y1 + 10.0;
-	            x1 = fts[Camera::BeginCull] - zero;
+	            x1 = fts[Producer::Camera::BeginCull] - zero;
-	            x2 = fts[Camera::EndCull]   - zero;
+	            x2 = fts[Producer::Camera::EndCull]   - zero;
 
  	            glColor4f( 0.0, 0.0, 1.0, 0.5 );
 	            glVertex2d( x1, y1);
@@ -77,8 +95,8 @@ class FrameStatsHandler : public CameraGroup::StatsHandler, public Camera::Callb
 	            glVertex2d( x2, y2);
 	            glVertex2d( x1, y2);
 
-	            x1 = fts[Camera::BeginDraw] - zero;
+	            x1 = fts[Producer::Camera::BeginDraw] - zero;
-	            x2 = fts[Camera::EndDraw]   - zero;
+	            x2 = fts[Producer::Camera::EndDraw]   - zero;
 
  	            glColor4f( 1.0, 0.0, 0.0, 0.5 );
 	            glVertex2d( x1, y1);
@@ -99,8 +117,8 @@ class FrameStatsHandler : public CameraGroup::StatsHandler, public Camera::Callb
 	        for( i = 0; i < fs.getNumFrameTimeStampSets(); i++ )
                 {
 		    y2 = y1 + 11; 
-		    Camera::FrameTimeStampSet fts = fs.getFrameTimeStampSet(i);
+		    Producer::Camera::FrameTimeStampSet fts = fs.getFrameTimeStampSet(i);
-		    Camera::TimeStamp vsync = fts[Camera::Vsync];
+		    Producer::Camera::TimeStamp vsync = fts[Producer::Camera::Vsync];
 		    double x1 = vsync - zero;
                     glColor4f( 1.0, 1.0, 0.0, 0.5 );
 	            glVertex2d( x1, y1 );
@@ -136,8 +154,10 @@ class FrameStatsHandler : public CameraGroup::StatsHandler, public Camera::Callb
         }
 
     private:
-	std::vector <CameraGroup::FrameStats> _fs;
+	std::vector <Producer::CameraGroup::FrameStats> _fs;
 	unsigned int _index;
 };
+
 }
+
 #endif

include/osgProducer/StatsEventHandler

@@ -8,7 +8,7 @@ class StatsEventHandler : public osgGA::GUIEventHandler
     
         StatsEventHandler(osgProducer::Viewer* cg):_cg(cg) {}
     
-        virtual bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& aa)
+        virtual bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter&)
         {
             if(!_cg) return false;
 

include/osgProducer/Viewer

@@ -16,6 +16,7 @@
 
 #include <osg/Timer>
 #include <osg/NodeVisitor>
+#include <osg/ArgumentParser>
 
 #include <osgGA/GUIActionAdapter>
 #include <osgGA/GUIEventHandler>
@@ -38,6 +39,8 @@ class OSGPRODUCER_EXPORT Viewer : public CameraGroup, public osgGA::GUIActionAda
 
         Viewer(const std::string& configFile);
 
+        Viewer(osg::ArgumentParser& arguments);
+
         virtual ~Viewer() {}
 
 

src/Demos/osgproducer/Makefile

@@ -1,4 +1,4 @@
-TOPDIR = ../../..
+TOPDIR = ../../../
 include $(TOPDIR)/Make/makedefs 
 
 CXXFILES =\

src/Demos/osgproducer/osgproducer_viewer.cpp

@@ -2,6 +2,10 @@
 //Distributed under the terms of the GNU LIBRARY GENERAL PUBLIC LICENSE (LGPL)
 //as published by the Free Software Foundation.
 
+#include <osg/ArgumentParser>
+#include <osg/ApplicationUsage>
+
+
 #include <osgUtil/Optimizer>
 
 #include <osgDB/ReadFile>
@@ -15,83 +19,85 @@
 int main( int argc, char **argv )
 {
 
-    // create the commandline args.
+    // 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.
+    osg::ApplicationUsage::instance()->setCommandLineUsage(arguments.getProgramName()+" [options] filename ...");
+    osg::ApplicationUsage::instance()->addCommandLineOption("-h or --help","Display this information");
+    osg::ApplicationUsage::instance()->addCommandLineOption("-p <filename>","Specify camera path file to animate the camera through the loaded scene");
+
+    
+    // construct the viewer.
+    osgProducer::Viewer viewer(arguments);
+
+    // set up the value with sensible default event handlers.
+    viewer.setUpViewer();
+
+    // if a pathfile has been specified on command line use it to animate the camera via an AnimationPathManipulator.
     std::string pathfile;
-    std::string configfile;
+    while (arguments.read("-p",pathfile))
-    std::vector<std::string> commandLine;
+    {
-    for(int i=1;i<argc;++i) {
-	if( std::string(argv[i]) == "-p" ) {
-	    if( (i+1) >= argc ) {
-		std::cout << "path argument required for -p option."<<std::endl;
-	    	return 1;
-	    }
-	    else
-		pathfile = std::string(argv[++i]);
-	}
-	else 
-	if( std::string(argv[i]) == "-c" ) {
-	    if( (i+1) >= argc ) {
-		std::cout << "path argument required for -c option."<<std::endl;
-	    	return 1;
-	    }
-	    else
-		configfile = std::string(argv[++i]);
-	}
-	else 
-	    commandLine.push_back(argv[i]);
-    }
-
-    osg::DisplaySettings::instance()->readCommandLine(commandLine);
-    osgDB::readCommandLine(commandLine);
-
-    osgProducer::Viewer* viewer = 0;
-    if (!configfile.empty()) viewer = new osgProducer::Viewer(configfile);
-    else viewer = new osgProducer::Viewer;
-
-
-    // configure the plugin registry from the commandline arguments, and 
-    // eat any parameters that have been matched.
-    osgDB::readCommandLine(commandLine);
-
-
-    // read the scene.
-    osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFiles(commandLine);
-    if (!loadedModel) return 1;
-
-    // optimize it, remove rendundent nodes and state etc.
-    osgUtil::Optimizer optimizer;
-    optimizer.optimize(loadedModel.get());
-
-
-    // set up the value with sensible defaults.
-    viewer->setUpViewer();
-
-    if( !pathfile.empty() ) {
 	osg::ref_ptr<osgGA::AnimationPathManipulator> apm = new osgGA::AnimationPathManipulator(pathfile);
 	if( apm.valid() && apm->valid() ) 
         {
-            unsigned int num = viewer->addCameraManipulator(apm.get());
+            unsigned int num = viewer.addCameraManipulator(apm.get());
-            viewer->selectCameraManipulator(num);
+            viewer.selectCameraManipulator(num);
         }
     }
 
+
+    // if user request help pritn it out to cout.
+    if (arguments.read("-h") || arguments.read("--help"))
+    {
+        osg::ApplicationUsage::instance()->write(cout);
+        return 1;
+    }
+
+
+    // read the scene from the list of file specified commandline args.
+    osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFiles(arguments);
+
+    // any option left unread a converted into errors to write out later.
+    arguments.reportRemainingOptionsAsUnrecognized();
+
+    // report any errors if they have occured when parsing the program aguments.
+    if (arguments.errors())
+    {
+        arguments.writeErrorMessages(cout);
+        return 1;
+    }
+
+
+    // if no model has been successfully loaded report failure.
+    if (!loadedModel) 
+    {
+        std::cout << arguments.getProgramName() <<": No input files" << std::endl;
+        return 1;
+    }
+
+
+    // optimize the scene graph, remove rendundent nodes and state etc.
+    osgUtil::Optimizer optimizer;
+    optimizer.optimize(loadedModel.get());
+
     // set the scene to render
-    viewer->setSceneData(loadedModel.get());
+    viewer.setSceneData(loadedModel.get());
 
     // create the windows and run the threads.
-    viewer->realize(Producer::CameraGroup::ThreadPerCamera);
+    viewer.realize(Producer::CameraGroup::ThreadPerCamera);
 
-    while( !viewer->done() )
+    while( !viewer.done() )
     {
         // wait for all cull and draw threads to complete.
-        viewer->sync();
+        viewer.sync();
 
         // update the scene by traversing it with the the update visitor which will
         // call all node update callbacks and animations.
-        viewer->update();
+        viewer.update();
          
         // fire off the cull and draw traversals of the scene.
-        viewer->frame();
+        viewer.frame();
         
     }
     return 0;

src/osg/ApplicationUsage.cpp

@@ -0,0 +1,171 @@
+#include <osg/ApplicationUsage>
+
+using namespace osg;
+
+ApplicationUsage::ApplicationUsage(const std::string& commandLineUsage):
+    _commandLineUsage(commandLineUsage)
+{
+}
+
+ApplicationUsage* ApplicationUsage::instance()
+{
+    static ApplicationUsage s_applicationUsage;
+    return &s_applicationUsage;
+}
+
+void ApplicationUsage::addUsageExplanation(Type type,const std::string& option,const std::string& explanation)
+{
+    switch(type)
+    {
+        case(COMMAND_LINE_OPTION):
+            addCommandLineOption(option,explanation);
+            break;
+        case(ENVIRONMENTAL_VARIABLE):
+            addEnvironmentalVariable(option,explanation);
+            break;
+        case(KEYBOARD_MOUSE_BINDING):
+            addKeyboardMouseBinding(option,explanation);
+            break;
+    }
+}
+
+void ApplicationUsage::addCommandLineOption(const std::string& option,const std::string& explanation)
+{
+    _commandLineOptions[option]=explanation;
+}
+
+void ApplicationUsage::addEnvironmentalVariable(const std::string& option,const std::string& explanation)
+{
+    _environmentalVariables[option]=explanation;
+}
+
+void ApplicationUsage::addKeyboardMouseBinding(const std::string& option,const std::string& explanation)
+{
+    _keyboardMouse[option]=explanation;
+}
+
+void ApplicationUsage::write(std::ostream& output, const ApplicationUsage::UsageMap& um,unsigned int widthOfOutput)
+{
+    unsigned int maxNumCharsInOptions = 0;
+    ApplicationUsage::UsageMap::const_iterator citr;
+    for(citr=um.begin();
+        citr!=um.end();
+        ++citr)
+    {
+        maxNumCharsInOptions = std::max(maxNumCharsInOptions,citr->first.length());
+    }
+    
+    unsigned int fullWidth = widthOfOutput;
+    unsigned int optionPos = 2;
+    unsigned int optionWidth = maxNumCharsInOptions;
+    unsigned int explanationPos = 2+maxNumCharsInOptions+2;
+    unsigned int explanationWidth = fullWidth-explanationPos;
+
+    std::string line;
+    
+    for(citr=um.begin();
+        citr!=um.end();
+        ++citr)
+    {
+        line.assign(fullWidth,' ');
+        line.replace(optionPos,optionWidth,citr->first);
+        
+        const std::string& explanation = citr->second;
+        unsigned int pos = 0;
+        unsigned int offset = 0;
+        bool firstInLine = true;
+        while (pos<explanation.length())
+        {
+            if (firstInLine) offset = 0;
+                    
+            // skip any leading white space.
+            while (pos<explanation.length() && explanation[pos]==' ')
+            {
+                if (firstInLine) ++offset;
+                ++pos;
+            }
+            
+            firstInLine = false;
+        
+            unsigned int width = std::min(explanation.length()-pos,explanationWidth-offset);
+            unsigned int slashn_pos = explanation.find('\n',pos);
+            unsigned int extraSkip = 0;
+            bool concatinated = false;
+            if (slashn_pos!=std::string::npos)
+            {
+                if (slashn_pos<pos+width)
+                {
+                    width = slashn_pos-pos;
+                    ++extraSkip;
+                    firstInLine = true;
+                }
+                else if (slashn_pos==pos+width) 
+                {
+                    ++extraSkip;
+                    firstInLine = true;
+                }
+            }
+            
+            if (pos+width<explanation.length())
+            {
+                // now reduce width until we get a space or a return
+                // so that we ensure that whole words are printed.
+                while (width>0 && 
+                       explanation[pos+width]!=' ' && 
+                       explanation[pos+width]!='\n') --width;
+                       
+                if (width==0)
+                {
+                    // word must be longer than a whole line so will need
+                    // to concatinate it.
+                    width = explanationWidth-1;
+                    concatinated = true;
+                }
+            }
+                                              
+            line.replace(explanationPos+offset,explanationWidth, explanation, pos, width);
+            if (concatinated) output << line << '-' << std::endl;
+            else output << line << std::endl;
+            
+            
+            // move to the next line of output.
+            line.assign(fullWidth,' ');
+            pos += width+extraSkip;
+
+            
+        }
+                
+    }
+}
+
+void ApplicationUsage::write(std::ostream& output,unsigned int widthOfOutput)
+{
+
+    output << "Usage: "<<getCommandLineUsage()<<std::endl;
+    bool needspace = false;
+    if (!getCommandLineOptions().empty())
+    {
+        if (needspace) output << std::endl;
+        output << "Options:"<<std::endl;
+        write(output,getCommandLineOptions(),widthOfOutput);
+        needspace = true;
+    }
+    
+    if (!getEnvironmentalVariables().empty())
+    {
+        if (needspace) output << std::endl;
+        output << "Environmental Variables:"<<std::endl;
+        write(output,getEnvironmentalVariables(),widthOfOutput);
+        needspace = true;
+    }
+
+    if (!getKeyboardMouseBindings().empty())
+    {
+        if (needspace) output << std::endl;
+        output << "Keyboard and Mouse Bindings:"<<std::endl;
+        write(output,getKeyboardMouseBindings(),widthOfOutput);
+        needspace = true;
+    }
+
+}
+

src/osg/ArgumentParser.cpp

@@ -0,0 +1,286 @@
+#include <osg/ArgumentParser>
+
+using namespace osg;
+
+std::string ArgumentParser::getProgramName() const
+{
+    if (_argc>0) return std::string(_argv[0]);
+    return "";
+}
+
+int ArgumentParser::find(const std::string& str) const
+{
+    for(int pos=1;pos<*_argc;++pos)
+    {
+        if (str==_argv[pos]) return pos;
+    }
+    return 0;
+}
+
+bool ArgumentParser::match(int pos, const std::string& str) const
+{
+    return pos<*_argc && str==_argv[pos];
+}
+
+bool ArgumentParser::isOption(int pos) const
+{
+    return (pos<*_argc && _argv[pos][0]=='-');
+}
+
+bool ArgumentParser::isString(int pos) const
+{
+    return pos<*_argc && !isOption(pos);
+}
+
+bool ArgumentParser::isNumber(int pos) const
+{
+    if (pos>=*_argc) return false;
+    
+    bool hadPlusMinus = false;
+    bool hadDecimalPlace = false;
+    bool hadExponent = false;
+    bool couldBeInt = true;
+    bool couldBeFloat = true;
+    int noZeroToNine = 0;
+
+    const char* ptr = _argv[pos];
+    
+    // check if could be a hex number.
+    if (strncmp(ptr,"0x",2)==0)
+    {
+        // skip over leading 0x, and then go through rest of string
+        // checking to make sure all values are 0...9 or a..f.
+        ptr+=2;
+        while (
+               *ptr!=0 &&
+               ((*ptr>='0' && *ptr<='9') ||
+                (*ptr>='a' && *ptr<='f') ||  
+                (*ptr>='A' && *ptr<='F'))
+              )
+        {
+            ++ptr;
+        }
+        
+        // got to end of string without failure, therefore must be a hex integer.
+        if (*ptr==0) return true;
+    }
+    
+    ptr = _argv[pos];
+    // check if a float or an int.
+    while (*ptr!=0 && couldBeFloat)
+    {
+        if (*ptr=='+' || *ptr=='-')
+        {
+            if (hadPlusMinus)
+            {
+                couldBeInt = false;
+                couldBeFloat = false;
+            } else hadPlusMinus = true;
+        }
+        else if (*ptr>='0' && *ptr<='9')
+        {
+            noZeroToNine++;
+        }
+        else if (*ptr=='.')
+        {
+            if (hadDecimalPlace)
+            {
+                couldBeInt = false;
+                couldBeFloat = false;
+            }
+            else
+            {
+                hadDecimalPlace = true;
+                couldBeInt = false;
+            }
+        }
+        else if (*ptr=='e' || *ptr=='E')
+        {
+            if (hadExponent || noZeroToNine==0)
+            {
+                couldBeInt = false;
+                couldBeFloat = false;
+            }
+            else
+            {
+                hadExponent = true;
+                couldBeInt = false;
+                hadDecimalPlace = false;
+                hadPlusMinus = false;
+                noZeroToNine=0;
+            }
+        }
+        else
+        {
+            couldBeInt = false;
+            couldBeFloat = false;
+        }
+        ++ptr;
+    }
+
+    if (couldBeInt && noZeroToNine>0) return true;
+    if (couldBeFloat && noZeroToNine>0) return true;
+
+    return false;
+    
+}
+
+bool ArgumentParser::containsOptions() const
+{
+    for(int pos=1;pos<*_argc;++pos)
+    {
+        if (isOption(pos)) return true;
+    }
+    return false;
+}
+
+
+void ArgumentParser::remove(int pos,int num)
+{
+    if (num==0) return;
+    
+    for(;pos+num<*_argc;++pos)
+    {
+        _argv[pos]=_argv[pos+num];
+    }
+    for(;pos<*_argc;++pos)
+    {
+        _argv[pos]=0;
+    }
+    *_argc-=num;
+}
+
+bool ArgumentParser::read(const std::string& str)
+{
+    int pos=find(str);
+    if (pos<=0) return false;
+    remove(pos);
+    return true;
+}
+
+bool ArgumentParser::read(const std::string& str,std::string& value1)
+{
+    int pos=find(str);
+    if (pos<=0) return false;
+    if (!isString(pos+1))
+    {
+        reportError("argument to `"+str+"` is missing");
+        return false;
+    }
+    value1 = _argv[pos+1];
+    remove(pos,2);
+    return true;
+}
+
+bool ArgumentParser::read(const std::string& str,std::string& value1,std::string& value2)
+{
+    int pos=find(str);
+    if (pos<=0) return false;
+    if (!isString(pos+1) || !isString(pos+2) )
+    {
+        reportError("argument to `"+str+"` is missing");
+        return false;
+    }
+    value1 = _argv[pos+1];
+    value2 = _argv[pos+2];
+    remove(pos,3);
+    return true;
+}
+
+bool ArgumentParser::read(const std::string& str,std::string& value1,std::string& value2,std::string& value3)
+{
+    int pos=find(str);
+    if (pos<=0) return false;
+    if (!isString(pos+1) || !isString(pos+2)  || !isString(pos+3))
+    {
+        reportError("argument to `"+str+"` is missing");
+        return false;
+    }
+    value1 = _argv[pos+1];
+    value2 = _argv[pos+2];
+    value3 = _argv[pos+3];
+    remove(pos,4);
+    return true;
+}
+
+
+bool ArgumentParser::read(const std::string& str,float& value1)
+{
+    int pos=find(str);
+    if (pos<=0) return false;
+    if (!isNumber(pos+1))
+    {
+        reportError("argument to `"+str+"` is missing");
+        return false;
+    }
+    value1 = atof(_argv[pos+1]);
+    remove(pos,2);
+    return true;
+}
+
+bool ArgumentParser::read(const std::string& str,float& value1,float& value2)
+{
+    int pos=find(str);
+    if (pos<=0) return false;
+    if (!isNumber(pos+1) || !isNumber(pos+2) )
+    {
+        reportError("argument to `"+str+"` is missing");
+        return false;
+    }
+    value1 = atof(_argv[pos+1]);
+    value2 = atof(_argv[pos+2]);
+    remove(pos,3);
+    return true;
+}
+
+bool ArgumentParser::read(const std::string& str,float& value1,float& value2,float& value3)
+{
+    int pos=find(str);
+    if (pos<=0) return false;
+    if (!isNumber(pos+1) || !isNumber(pos+2)  || !isNumber(pos+3))
+    {
+        reportError("argument to `"+str+"` is missing");
+        return false;
+    }
+    value1 = atof(_argv[pos+1]);
+    value2 = atof(_argv[pos+2]);
+    value3 = atof(_argv[pos+3]);
+    remove(pos,4);
+    return true;
+}
+
+bool ArgumentParser::errors(ErrorSeverity severity) const
+{
+    for(ErrorMessageMap::const_iterator itr=_errorMessageMap.begin();
+        itr!=_errorMessageMap.end();
+        ++itr)
+    {
+        if (itr->second>=severity) return true;
+    }
+    return false;
+}
+
+void ArgumentParser::reportError(const std::string& message,ErrorSeverity severity)
+{
+    _errorMessageMap[message]=severity;
+}
+
+void ArgumentParser::reportRemainingOptionsAsUnrecognized(ErrorSeverity severity)
+{
+    for(int pos=1;pos<argc();++pos)
+    {
+        if (isOption(pos)) reportError(getProgramName() +": unrceognized option "+_argv[pos],severity);
+    }
+}
+void ArgumentParser::writeErrorMessages(std::ostream& output,ErrorSeverity severity)
+{
+    for(ErrorMessageMap::iterator itr=_errorMessageMap.begin();
+        itr!=_errorMessageMap.end();
+        ++itr)
+    {
+        if (itr->second>=severity)
+        {
+            output<<getProgramName()<<": "<<itr->first<<std::endl;
+        }
+    }
+}

src/osg/DisplaySettings.cpp

@@ -11,6 +11,7 @@
  * OpenSceneGraph Public License for more details.
 */
 #include <osg/DisplaySettings>
+#include <osg/ApplicationUsage>
 #include <osg/ref_ptr>
 
 #include <algorithm>
@@ -104,6 +105,17 @@ void DisplaySettings::setDefaults()
     #endif
 }
 
+ApplicationUsageProxy e0(ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_STEREO_MODE <mode>","QUAD_BUFFER | ANAGLYPHIC | HORIZONTAL_SPLIT | VERTICAL_SPLIT | LEFT_EYE | RIGHT_EYE");
+ApplicationUsageProxy e1(ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_STEREO <mode>","OFF | ON");
+ApplicationUsageProxy e2(ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_EYE_SEPARATION <float>","physical distance between eyes");
+ApplicationUsageProxy e3(ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_SCREEN_DISTANCE <float>","physical distance between eyes and screen");
+ApplicationUsageProxy e4(ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_SCREEN_HEIGHT <float>","physical screen height");
+ApplicationUsageProxy e5(ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_SPLIT_STEREO_HORIZONTAL_EYE_MAPPING <mode>","LEFT_EYE_LEFT_VIEWPORT | LEFT_EYE_RIGHT_VIEWPORT");
+ApplicationUsageProxy e8(ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_SPLIT_STEREO_HORIZONTAL_SEPARATION <float>","number of pixels between viewports");
+ApplicationUsageProxy e9(ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_SPLIT_STEREO_VERTICAL_EYE_MAPPING <mode>","LEFT_EYE_TOP_VIEWPORT | LEFT_EYE_BOTTOM_VIEWPORT");
+ApplicationUsageProxy e11(ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_SPLIT_STEREO_VERTICAL_SEPARATION <float>","number of pixels between viewports");
+ApplicationUsageProxy e12(ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_MAX_NUMBER_OF_GRAPHICS_CONTEXTS <int>","maximum number of graphics contexts to be used with applications.");
+
 void DisplaySettings::readEnvironmentalVariables()
 {
     char *ptr;
@@ -281,3 +293,31 @@ void DisplaySettings::readCommandLine(std::vector<std::string>& commandLine)
 
     }    
 }
+
+void DisplaySettings::readCommandLine(ArgumentParser& parser)
+{
+    int pos;
+    while ((pos=parser.find("-stereo"))!=0)
+    {
+        if (parser.match(pos+1,"ANAGLYPHIC"))            { parser.remove(pos,2); _stereo = true;_stereoMode = ANAGLYPHIC; }
+        else if (parser.match(pos+1,"QUAD_BUFFER"))      { parser.remove(pos,2); _stereo = true;_stereoMode = QUAD_BUFFER; }
+        else if (parser.match(pos+1,"HORIZONTAL_SPLIT")) { parser.remove(pos,2); _stereo = true;_stereoMode = HORIZONTAL_SPLIT; }
+        else if (parser.match(pos+1,"VERTICAL_SPLIT"))   { parser.remove(pos,2); _stereo = true;_stereoMode = VERTICAL_SPLIT; }
+        else if (parser.match(pos+1,"LEFT_EYE"))         { parser.remove(pos,2); _stereo = true;_stereoMode = LEFT_EYE; }
+        else if (parser.match(pos+1,"RIGHT_EYE"))        { parser.remove(pos,2); _stereo = true;_stereoMode = RIGHT_EYE; }
+        else if (parser.match(pos+1,"ON"))               { parser.remove(pos,2); _stereo = true; }
+        else if (parser.match(pos+1,"OFF"))              { parser.remove(pos,2); _stereo = false; }
+        else                                             { parser.remove(pos); _stereo = true; }
+    }
+
+    while (parser.read("-rgba"))
+    {
+        _RGB = true;
+        _minimumNumberAlphaBits = 1;
+    }            
+
+    while (parser.read("-stencil"))
+    {
+        _minimumNumberStencilBits = 1;
+    }
+}

src/osg/Makefile

@@ -4,6 +4,8 @@ include $(TOPDIR)/Make/makedefs
 CXXFILES =\
 	AlphaFunc.cpp\
 	AnimationPath.cpp\
+        ApplicationUsage.cpp\
+        ArgumentParser.cpp\
 	Array.cpp\
 	Billboard.cpp\
 	BoundingBox.cpp\

src/osgDB/ReadFile.cpp

@@ -96,3 +96,52 @@ Node* osgDB::readNodeFiles(std::vector<std::string>& commandLine)
     }
     
 }
+
+Node* osgDB::readNodeFiles(osg::ArgumentParser& arguments)
+{
+    osgDB::readCommandLine(arguments);
+
+    typedef std::vector<osg::Node*> NodeList;
+    NodeList nodeList;
+
+    // note currently doesn't delete the loaded file entries from the command line yet...
+
+    for(int pos=1;pos<arguments.argc();++pos)
+    {
+        if (!arguments.isOption(pos))
+        {
+            // not an option so assume string is a filename.
+            osg::Node *node = osgDB::readNodeFile( arguments[pos] );
+
+            if(node)
+            {
+                if (node->getName().empty()) node->setName( arguments[pos] );
+                nodeList.push_back(node);
+            }
+
+        }
+    }
+    
+    if (nodeList.empty())
+    {
+        return NULL;
+    }
+
+    if (nodeList.size()==1)
+    {
+        return nodeList.front();
+    }
+    else  // size >1
+    {
+        osg::Group* group = new osg::Group;
+        for(NodeList::iterator itr=nodeList.begin();
+            itr!=nodeList.end();
+            ++itr)
+        {
+            group->addChild(*itr);
+        }
+
+        return group;
+    }
+    
+}

src/osgDB/Registry.cpp

@@ -17,6 +17,7 @@
 #include <osg/Node>
 #include <osg/Group>
 #include <osg/Geode>
+#include <osg/ApplicationUsage>
 
 #include <osgDB/Registry>
 #include <osgDB/FileUtils>
@@ -83,7 +84,11 @@ Registry::~Registry()
 {
 }
 
-
+#ifndef WIN32
+osg::ApplicationUsageProxy e0(osg::ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_FILE_PATH <path>[:path]..","Paths for locating datafiles");
+#else
+osg::ApplicationUsageProxy e0(osg::ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_FILE_PATH <path>[;path]..","Paths for locating datafiles");
+#endif
 
 void Registry::initDataFilePathList()
 {
@@ -106,6 +111,12 @@ void Registry::initDataFilePathList()
     PrintFilePathList(osg::notify(INFO),getDataFilePathList());
 }
 
+#ifndef WIN32
+osg::ApplicationUsageProxy e1(osg::ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_LIBRARY_PATH <path>[:path]..","Paths for locating libraries/ plugins");
+#else
+osg::ApplicationUsageProxy e1(osg::ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_LIBRARY_PATH <path>[;path]..","Paths for locating libraries/ plugins");
+#endif
+
 void Registry::initLibraryFilePathList()
 {
     //
@@ -266,6 +277,27 @@ void Registry::readCommandLine(std::vector<std::string>& commandLine)
     }    
 }
 
+void Registry::readCommandLine(osg::ArgumentParser& parser)
+{
+
+    std::string value;
+    while(parser.read("-l",value))
+    {
+        loadLibrary(value);
+    }
+        
+    while(parser.read("-e",value))
+    {
+        std::string libName = createLibraryNameForExt(value);
+        loadLibrary(libName);
+    }
+
+    while(parser.read("-O",value))
+    {
+        setOptions(new osgDB::ReaderWriter::Options(value));
+    }
+}
+
 void Registry::addDotOsgWrapper(DotOsgWrapper* wrapper)
 {
     if (wrapper==0L) return;

src/osgProducer/CameraGroup.cpp

@@ -14,18 +14,33 @@ std::string findCameraConfigFile(const std::string& configFile)
     else return foundFile;
 }
 
+std::string extractCameraConfigFile(osg::ArgumentParser& arguments)
+{
+    std::string filename;
+    if (arguments.read("-c",filename)) return filename;
+    return "";
+}
+
 
 CameraGroup::CameraGroup() : Producer::CameraGroup() 
 {
     _init();
 }
 
-CameraGroup::CameraGroup(Producer::CameraConfig *cfg): Producer::CameraGroup(cfg) 
+CameraGroup::CameraGroup(Producer::CameraConfig *cfg):
+    Producer::CameraGroup(cfg) 
 {
     _init();
 }
 
-CameraGroup::CameraGroup(const std::string& configFile) : Producer::CameraGroup(findCameraConfigFile(configFile)) 
+CameraGroup::CameraGroup(const std::string& configFile):
+    Producer::CameraGroup(findCameraConfigFile(configFile)) 
+{
+    _init();
+}
+
+CameraGroup::CameraGroup(osg::ArgumentParser& arguments):
+    Producer::CameraGroup(extractCameraConfigFile(arguments))
 {
     _init();
 }

src/osgProducer/Viewer.cpp

@@ -6,6 +6,9 @@
 
 #include <osgUtil/UpdateVisitor>
 
+#include <osgDB/Registry>
+
+#include <osgGA/AnimationPathManipulator>
 #include <osgGA/TrackballManipulator>
 #include <osgGA/FlightManipulator>
 #include <osgGA/DriveManipulator>
@@ -13,6 +16,7 @@
 
 using namespace osgProducer;
 
+
 Viewer::Viewer():
     _done(0),
     _frameNumber(0),
@@ -36,6 +40,27 @@ Viewer::Viewer(const std::string& configFile):
 {
 }
 
+Viewer::Viewer(osg::ArgumentParser& arguments):
+    CameraGroup(arguments),
+    _done(false),
+    _frameNumber(0),
+    _kbmcb(0)
+{
+    osg::DisplaySettings::instance()->readCommandLine(arguments);
+
+    std::string pathfile;
+    while (arguments.read("-p",pathfile))
+    {
+	osg::ref_ptr<osgGA::AnimationPathManipulator> apm = new osgGA::AnimationPathManipulator(pathfile);
+	if( apm.valid() && apm->valid() ) 
+        {
+            unsigned int num = addCameraManipulator(apm.get());
+            selectCameraManipulator(num);
+        }
+    }
+}
+
+
 void Viewer::setUpViewer(unsigned int options)
 {
 
@@ -108,7 +133,7 @@ void Viewer::setUpViewer(unsigned int options)
     if (options&STATS_MANIPULATOR)
     {
         // register the drawing of stats to pipe 0.
-        Producer::FrameStatsHandler* fsh = new Producer::FrameStatsHandler;
+        FrameStatsHandler* fsh = new FrameStatsHandler;
         setStatsHandler(fsh);
         getCamera(0)->addPostDrawCallback(fsh);