From Wojciech Lewandowski, "ref_ptr usage changes made on 9th of June broke VirtualProgram used in osgShaderCompositor example. Taking the opportunity I modified the code a little to use earth sphere as default model. Cow.osg used previously was not looking good in advanced example. I also changed default to advanced example, because its more informative with labels describing virtual programs used to render the objects."

examples/osgshadercompositor/CreateAdvancedHierachy.cpp

@@ -1,17 +1,11 @@
 #include <iostream>
 #include <osg/Geode>
 #include <osg/TexGen>
-#include <osg/Material>
 #include <osg/Texture2D>
 #include <osg/MatrixTransform>
-#include <osg/ShapeDrawable>
 #include <osg/BlendFunc>
 #include <osgText/Text>
 #include <osgDB/ReadFile>
-#include <osgViewer/Viewer>
-#include <osgViewer/View>
-#include <osgViewer/CompositeViewer>
-#include <osgGA/TrackballManipulator>
 
 #include "VirtualProgram.h"
 
@@ -139,61 +133,6 @@ char PerFragmentDirectionalLightingFragmentShaderSource[] =
 "                 pow( NdotHV, gl_FrontMaterial.shininess );                \n" //17
 "}                                                                          \n";//18
 
-////////////////////////////////////////////////////////////////////////////////
-osg::Node * CreateModel( const char * file )
-{
-    if ( file ) {
-        osg::Node * node = NULL;        
-        node = osgDB::readNodeFile( file );
-        if( node )
-            return node;
-    }
-
-    // File not found - create textured sphere 
-    osg::Geode * geode = new osg::Geode;
-    osg::ref_ptr<osg::TessellationHints> hints = new osg::TessellationHints;
-    hints->setDetailRatio( 0.3 );
-
-#if 1
-    osg::ref_ptr<osg::ShapeDrawable> shape = new osg::ShapeDrawable
-        ( new osg::Sphere(osg::Vec3(0.0f, 0.0f, 0.0f), 4.0 ), hints.get() );
-#else
-    osg::ref_ptr<osg::ShapeDrawable> shape = new osg::ShapeDrawable
-        ( new osg::Box( osg::Vec3(-1.0f, -1.0f, -1.0f), 2.0, 2.0, 2.0 ) );
-#endif
-
-    shape->setColor(osg::Vec4(0.8f, 0.8f, 0.8f, 1.0f));
-
-    geode->addDrawable( shape.get() );
-
-    osg::StateSet * stateSet = new osg::StateSet;
-
-    osg::Texture2D * texture =  new osg::Texture2D( 
-        osgDB::readImageFile("Images/land_shallow_topo_2048.jpg") 
-    );
-
-    osg::Material * material = new osg::Material;
-
-    material->setAmbient
-        ( osg::Material::FRONT_AND_BACK, osg::Vec4( 0.9, 0.9, 0.9, 1.0 ) );
-
-    material->setDiffuse
-        ( osg::Material::FRONT_AND_BACK, osg::Vec4( 0.9, 0.9, 0.9, 1.0 ) );
-
-#if 1
-    material->setSpecular
-        ( osg::Material::FRONT_AND_BACK, osg::Vec4( 0.7, 0.3, 0.3, 1.0 ) );
-
-    material->setShininess( osg::Material::FRONT_AND_BACK, 25 );
-
-#endif
-
-    stateSet->setAttributeAndModes( material );
-    stateSet->setTextureAttributeAndModes( 0,texture, osg::StateAttribute::ON );
-
-    geode->setStateSet( stateSet );
-    return geode;
-}
 ////////////////////////////////////////////////////////////////////////////////
 // Convenience method to simplify code a little ...
 void SetVirtualProgramShader( VirtualProgram * virtualProgram,
@@ -240,9 +179,8 @@ void AddLabel( osg::Group * group, const std::string & label, float offset )
     text->setText( label );
 }
 ////////////////////////////////////////////////////////////////////////////////
-osg::Node * CreateAdvancedHierarchy( const char * file = NULL )
+osg::Node * CreateAdvancedHierarchy( osg::Node * model )
 {
-    osg::Node * model = CreateModel( file );
     if( !model ) return NULL;
     float offset = model->getBound().radius() * 1.3; // diameter
 

examples/osgshadercompositor/CreateSimpleHierachy.cpp

@@ -11,12 +11,10 @@
 using osgCandidate::VirtualProgram;
 
 ////////////////////////////////////////////////////////////////////////////////
-osg::Node * CreateSimpleHierarchy( const char * file )
+osg::Node * CreateSimpleHierarchy( osg::Node * node )
 {
-    osg::Node * node = osgDB::readNodeFile( file );
     if( !node ) return NULL;
     float r = node->getBound().radius(); // diameter
-
     osg::Group * root = new osg::Group();
     osg::Group * group = new osg::Group();
 

examples/osgshadercompositor/VirtualProgram.cpp

@@ -68,7 +68,7 @@ osg::Shader * VirtualProgram::setShader
        shaderCurrent = shaderNew;
     }
 
-    return shaderCurrent.release();
+    return shaderCurrent.get();
 }
 ////////////////////////////////////////////////////////////////////////////////
 void VirtualProgram::apply( osg::State & state ) const

examples/osgshadercompositor/osgshadercompositor.cpp

@@ -5,33 +5,87 @@
 #include <osg/MatrixTransform>
 #include <osgDB/ReadFile>
 #include <osgViewer/Viewer>
+#include <osg/ShapeDrawable>
+#include <osg/Material>
 
-extern osg::Node * CreateSimpleHierarchy( const char * file );
+extern osg::Node * CreateSimpleHierarchy( osg::Node * model );
-extern osg::Node * CreateAdvancedHierarchy( const char * file );
+extern osg::Node * CreateAdvancedHierarchy( osg::Node * model );
 
+////////////////////////////////////////////////////////////////////////////////
+osg::Node * CreateGlobe( void )
+{
+    // File not found - create textured sphere 
+    osg::Geode * geode = new osg::Geode;
+    osg::ref_ptr<osg::TessellationHints> hints = new osg::TessellationHints;
+    hints->setDetailRatio( 0.3 );
+
+#if 1
+    osg::ref_ptr<osg::ShapeDrawable> shape = new osg::ShapeDrawable
+        ( new osg::Sphere(osg::Vec3(0.0f, 0.0f, 0.0f), 4.0 ), hints.get() );
+#else
+    osg::ref_ptr<osg::ShapeDrawable> shape = new osg::ShapeDrawable
+        ( new osg::Box( osg::Vec3(-1.0f, -1.0f, -1.0f), 2.0, 2.0, 2.0 ) );
+#endif
+
+    shape->setColor(osg::Vec4(0.8f, 0.8f, 0.8f, 1.0f));
+
+    geode->addDrawable( shape.get() );
+
+    osg::StateSet * stateSet = new osg::StateSet;
+
+    osg::Texture2D * texture =  new osg::Texture2D( 
+        osgDB::readImageFile("Images/land_shallow_topo_2048.jpg") 
+    );
+
+    osg::Material * material = new osg::Material;
+
+    material->setAmbient
+        ( osg::Material::FRONT_AND_BACK, osg::Vec4( 0.9, 0.9, 0.9, 1.0 ) );
+
+    material->setDiffuse
+        ( osg::Material::FRONT_AND_BACK, osg::Vec4( 0.9, 0.9, 0.9, 1.0 ) );
+
+#if 1
+    material->setSpecular
+        ( osg::Material::FRONT_AND_BACK, osg::Vec4( 0.7, 0.3, 0.3, 1.0 ) );
+
+    material->setShininess( osg::Material::FRONT_AND_BACK, 25 );
+
+#endif
+
+    stateSet->setAttributeAndModes( material );
+    stateSet->setTextureAttributeAndModes( 0,texture, osg::StateAttribute::ON );
+
+    geode->setStateSet( stateSet );
+    return geode;
+}
+////////////////////////////////////////////////////////////////////////////////
 int main( int argc, char **argv )
 {
     // construct the viewer.
     osg::ArgumentParser arguments( &argc, argv );
     osgViewer::Viewer viewer( arguments );
 
-    std::string filename = "cow.osg";
+    bool useSimpleExample = arguments.read("-s") || arguments.read("--simple") ;
-    bool useAdvancedTechnique = arguments.read("-a") || arguments.read("--advanced") ;
 
-    if (arguments.argc()>1)
+    osg::Node * model = NULL;
-    {
+
-        if (!arguments.isOption(1)) filename =  arguments[1];
+    if (arguments.argc()>1 && !arguments.isOption(1) ) {
+        std::string filename = arguments[1];
+        model = osgDB::readNodeFile( filename );
+        if ( !model ) {
+            osg::notify( osg::NOTICE ) 
+                << "Error, cannot read " << filename 
+                << ". Loading default earth model instead." << std::endl;
+        }
     }
 
-    // osg::Node * node = CreateSimpleHierarchy( file );
+    if( model == NULL )
-    osg::Node * node = useAdvancedTechnique ?
+        model = CreateGlobe( );
-        CreateAdvancedHierarchy( filename.c_str() ) :
-        CreateSimpleHierarchy( filename.c_str() );
 
-    if ( !node ) {
+    osg::Node * node = useSimpleExample ?        
-        osg::notify( osg::NOTICE ) << "Error, cannot read " << filename << std::endl;
+        CreateSimpleHierarchy( model ):
-        return 1;
+        CreateAdvancedHierarchy( model );
-    }    
 
     viewer.setSceneData( node );
     viewer.realize(  );