Added examples/osghud - a osgProducer port of the old osghud demo.

Make/makedirdefs

@@ -80,6 +80,7 @@ EXAMPLE_DIRS = \
 	osgcameragroup\
 	osgviewer\
 	osgconv\
+	osghud\
 	osgtext\
 	osgstereoimage\
 

examples/osghud/Makefile

@@ -0,0 +1,15 @@
+TOPDIR = ../..
+include $(TOPDIR)/Make/makedefs 
+
+CXXFILES =\
+	osghud.cpp\
+
+LIBS     += -losgText -losgProducer -lProducer $(OSG_LIBS) -L/usr/local/lib $(FREETYPE_LIB) $(GLUT_LIB) $(GL_LIBS) $(X_LIBS) $(OTHER_LIBS)  
+
+INSTFILES = \
+	$(CXXFILES)\
+	Makefile.inst=Makefile
+
+EXEC = osghud
+
+include $(TOPDIR)/Make/makerules 

examples/osghud/Makefile.inst

@@ -0,0 +1,12 @@
+TOPDIR = ../..
+include $(TOPDIR)/Make/makedefs
+
+CXXFILES =\
+	osghud.cpp\
+
+LIBS     += -osgText -losgProducer -lProducer $(OSG_LIBS) -L/usr/local/lib $(FREETYPE_LIB) $(GLUT_LIB) $(GL_LIBS) $(X_LIBS) $(OTHER_LIBS) 
+
+EXEC = osghud
+
+
+include $(TOPDIR)/Make/makerules

examples/osghud/osghud.cpp

@@ -0,0 +1,185 @@
+/* -*-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.
+*/
+
+#include <osgUtil/Optimizer>
+#include <osgDB/ReadFile>
+#include <osgProducer/Viewer>
+
+#include <osg/Material>
+#include <osg/Geode>
+#include <osg/BlendFunc>
+#include <osg/Depth>
+#include <osg/Projection>
+#include <osg/MatrixTransform>
+
+#include <osgText/Text>
+
+
+osg::Node* createHUD()
+{
+    osg::Geode* geode = new osg::Geode();
+    
+    std::string timesFont("fonts/times.ttf");
+
+    // turn lighting off for the text and disable depth test to ensure its always ontop.
+    osg::StateSet* stateset = geode->getOrCreateStateSet();
+    stateset->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
+    stateset->setMode(GL_DEPTH_TEST,osg::StateAttribute::OFF);
+
+    osg::Vec3 position(150.0f,800.0f,0.0f);
+    osg::Vec3 delta(0.0f,-120.0f,0.0f);
+
+    {
+        osgText::Text* text = new  osgText::Text;
+        geode->addDrawable( text );
+
+        text->setFont(timesFont);
+        text->setText("Head Up Displays are simple :-)");
+        text->setPosition(position);
+        
+        position += delta;
+    }    
+
+
+    {
+        osgText::Text* text = new  osgText::Text;
+        geode->addDrawable( text );
+
+        text->setFont(timesFont);
+        text->setText("All you need to do is create your text in a subgraph.");
+        text->setPosition(position);
+        
+        position += delta;
+    }    
+
+
+    {
+        osgText::Text* text = new  osgText::Text;
+        geode->addDrawable( text );
+
+        text->setFont(timesFont);
+        text->setText("Disable depth test in this subgraph to ensure its always ontop.");
+        text->setPosition(position);
+        
+        position += delta;
+    }    
+
+    {
+        osgText::Text* text = new  osgText::Text;
+        geode->addDrawable( text );
+
+        text->setFont(timesFont);
+        text->setText("Then place a osg::Projection node above the subgraph\nto create an othrograph projection.");
+        text->setPosition(position);
+        
+        position += delta;
+    }    
+
+    {
+        osgText::Text* text = new  osgText::Text;
+        geode->addDrawable( text );
+
+        text->setFont(timesFont);
+        text->setText("And add an osg::ModelViewMatrix set to ABSOLUTE to ensure\nit remains independent from any external model view matrices.");
+        text->setPosition(position);
+        
+        position += delta;
+    }    
+
+    // create the hud.
+    osg::MatrixTransform* modelview_abs = new osg::MatrixTransform;
+    modelview_abs->setReferenceFrame(osg::Transform::RELATIVE_TO_ABSOLUTE);
+    modelview_abs->setMatrix(osg::Matrix::identity());
+    modelview_abs->addChild(geode);
+
+    osg::Projection* projection = new osg::Projection;
+    projection->setMatrix(osg::Matrix::ortho2D(0,1280,0,1024));
+    projection->addChild(modelview_abs);
+
+    return projection;
+
+}
+
+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()->setCommandLineUsage(arguments.getProgramName()+" [options] [filename] ...");
+    arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
+    
+
+    // construct the viewer.
+    osgProducer::Viewer viewer(arguments);
+
+    // set up the value with sensible default event handlers.
+    viewer.setUpViewer(osgProducer::Viewer::STANDARD_SETTINGS);
+
+    // get details on keyboard and mouse bindings used by the viewer.
+    viewer.getUsage(*arguments.getApplicationUsage());
+
+    // if user request help write it out to cout.
+    if (arguments.read("-h") || arguments.read("--help"))
+    {
+        arguments.getApplicationUsage()->write(cout);
+        return 1;
+    }
+
+    // any option left unread are 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;
+    }
+
+
+    // read the scene from the list of file specified commandline args.
+    osg::ref_ptr<osg::Node> scene = osgDB::readNodeFiles(arguments);
+
+    osg::ref_ptr<osg::Group> group = dynamic_cast<osg::Group*>(scene.get());
+    if (!group)
+    {
+        group = new osg::Group;
+        group->addChild(scene.get());
+    }
+
+    // add the HUD subgraph.    
+    group->addChild(createHUD());
+
+    // set the scene to render
+    viewer.setSceneData(group.get());
+
+    // create the windows and run the threads.
+    viewer.realize(Producer::CameraGroup::ThreadPerCamera);
+
+    while( !viewer.done() )
+    {
+        // wait for all cull and draw threads to complete.
+        viewer.sync();
+
+        // update the scene by traversing it with the the update visitor which will
+        // call all node update callbacks and animations.
+        viewer.update();
+         
+        // fire off the cull and draw traversals of the scene.
+        viewer.frame();
+        
+    }
+    
+    return 0;
+}