Addd support for maximum screen text size into osgText when auto scale to

screen is active.

Added osgautotransform demo.

examples/osgautotransform/GNUmakefile

@@ -0,0 +1,19 @@
+TOPDIR = ../..
+include $(TOPDIR)/Make/makedefs 
+
+CXXFILES =\
+	osgautotransform.cpp\
+
+LIBS     += -losgProducer -lProducer -losgText -losgProducer -lProducer -losgGA -losgDB -losgUtil -losg $(GL_LIBS) $(X_LIBS) $(OTHER_LIBS) 
+
+INSTFILES = \
+	$(CXXFILES)\
+	GNUmakefile.inst=GNUmakefile
+
+EXEC = osgautotransform
+
+INC += $(PRODUCER_INCLUDE_DIR) -I/usr/X11R6/include
+LDFLAGS  += $(PRODUCER_LIB_DIR)
+
+include $(TOPDIR)/Make/makerules 
+

examples/osgautotransform/GNUmakefile.inst

@@ -0,0 +1,14 @@
+TOPDIR = ../..
+include $(TOPDIR)/Make/makedefs
+
+CXXFILES =\
+	osgautotransform.cpp\
+
+LIBS     += -losgProducer -lProducer -losgText -losgProducer -lProducer -losgDB -losgText -losgUtil -losg $(GL_LIBS) $(X_LIBS) $(OTHER_LIBS) 
+
+EXEC = osgautotransform
+
+INC += $(PRODUCER_INCLUDE_DIR) -I/usr/X11R6/include
+LDFLAGS  += $(PRODUCER_LIB_DIR)
+
+include $(TOPDIR)/Make/makerules

examples/osgautotransform/osgautotransform.cpp

@@ -0,0 +1,245 @@
+/* -*-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/AutoTransform>
+#include <osg/Geometry>
+
+#include <osgText/Text>
+
+osg::Node* createLabel(const osg::Vec3& pos, float size, const std::string& label)
+{
+    osg::Geode* geode = new osg::Geode();
+    
+    std::string timesFont("fonts/arial.ttf");
+
+    {
+        osgText::Text* text = new  osgText::Text;
+        geode->addDrawable( text );
+
+        text->setFont(timesFont);
+        text->setPosition(pos);
+        text->setCharacterSize(size);
+        text->setAlignment(osgText::Text::CENTER_CENTER);
+        text->setText(label);
+        
+    }
+    
+    return geode;    
+}
+
+osg::Node* createLabel2(const osg::Vec3& pos, float size, const std::string& label)
+{
+    osg::Geode* geode = new osg::Geode();
+    
+    std::string timesFont("fonts/arial.ttf");
+
+    {
+        osgText::Text* text = new  osgText::Text;
+        geode->addDrawable( text );
+
+        text->setFont(timesFont);
+        text->setPosition(pos);
+        text->setFontResolution(40,40);
+        text->setCharacterSize(size);
+        text->setAlignment(osgText::Text::CENTER_CENTER);
+        text->setAutoRotateToScreen(true);
+        text->setAutoScaleToScreen(true);
+        text->setDrawMode(osgText::Text::TEXT_PIXMAP);
+        text->setText(label);
+        
+    }
+    
+    return geode;    
+}
+
+osg::Node* createLabel3(const osg::Vec3& pos, float size, const std::string& label)
+{
+    osg::Geode* geode = new osg::Geode();
+    
+    std::string timesFont("fonts/arial.ttf");
+
+    {
+        osgText::Text* text = new  osgText::Text;
+        geode->addDrawable( text );
+
+        text->setFont(timesFont);
+        text->setPosition(pos);
+        text->setFontResolution(40,40);
+        text->setCharacterSize(size);
+        text->setAlignment(osgText::Text::CENTER_CENTER);
+        text->setAutoRotateToScreen(true);
+        text->setAutoScaleToScreen(true);
+        text->setText(label);
+        
+    }
+    
+    return geode;    
+}
+
+osg::Node* createAxis(const osg::Vec3& s, const osg::Vec3& e, int numReps)
+{
+    osg::Group* group = new osg::Group;
+
+    osg::Vec3 dv = e-s;
+    dv /= float(numReps-1);
+
+    osg::Vec3 pos = s;
+
+    bool useAuto = false;
+    if (useAuto)
+    {
+        osg::Vec3Array* vertices = new osg::Vec3Array;
+
+        for(int i=0;i<numReps;++i)
+        {
+            osg::AutoTransform* at = new osg::AutoTransform;
+            at->setPosition(pos);
+            at->setAutoRotateToScreen(true);
+            at->setAutoScaleToScreen(true);
+            at->addChild(createLabel(osg::Vec3(0.0f,0.0f,0.0f),40.0f,"Test 2"));
+            vertices->push_back(pos);
+            pos += dv;
+
+
+            group->addChild(at);
+        }
+
+        osg::Vec4Array* colors = new osg::Vec4Array;
+        colors->push_back(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
+
+        osg::Geometry* geom = new osg::Geometry;
+        geom->setVertexArray(vertices);
+        geom->setColorArray(colors);
+        geom->addPrimitiveSet(new osg::DrawArrays(GL_LINE_STRIP,0,vertices->size()));
+
+        osg::Geode* geode = new osg::Geode;
+        geode->addDrawable(geom);
+
+        group->addChild(geode);
+    }
+    else
+    {
+        osg::Vec3Array* vertices = new osg::Vec3Array;
+
+        for(int i=0;i<numReps;++i)
+        {
+            group->addChild(createLabel3(osg::Vec3(pos),dv.length()*0.5f,"Test 2"));
+            vertices->push_back(pos);
+            pos += dv;
+
+
+        }
+
+        osg::Vec4Array* colors = new osg::Vec4Array;
+        colors->push_back(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
+
+        osg::Geometry* geom = new osg::Geometry;
+        geom->setVertexArray(vertices);
+        geom->setColorArray(colors);
+        geom->addPrimitiveSet(new osg::DrawArrays(GL_LINE_STRIP,0,vertices->size()));
+
+        osg::Geode* geode = new osg::Geode;
+        geode->addDrawable(geom);
+
+        group->addChild(geode);
+    }
+    
+    return group;
+}
+
+osg::Node* createScene()
+{
+    osg::Group* root = new osg::Group;
+    
+    int numReps = 3333;
+//    int numReps = 10;
+    root->addChild(createAxis(osg::Vec3(0.0,0.0,0.0),osg::Vec3(1000.0,0.0,0.0),numReps));
+    root->addChild(createAxis(osg::Vec3(0.0,0.0,0.0),osg::Vec3(0.0,1000.0,0.0),numReps));
+    root->addChild(createAxis(osg::Vec3(0.0,0.0,0.0),osg::Vec3(0.0,0.0,1000.0),numReps));    
+    
+    return root;
+}
+
+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()->setDescription(arguments.getApplicationName()+" is the example which demonstrates how to do Head Up Displays.");
+    arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" [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(std::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(std::cout);
+        return 1;
+    }
+    
+
+    // set the scene to render
+    viewer.setSceneData(createScene());
+
+    // create the windows and run the threads.
+    viewer.realize();
+
+    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();
+        
+    }
+    
+    // wait for all cull and draw threads to complete before exit.
+    viewer.sync();
+    
+    return 0;
+}