Atmosphere.h

#pragma once
#include "Scene.h"
#include "Fog.h"
#include <osg/PolygonMode>
#include <osg/ShapeDrawable>

namespace osgCloudyDay
{
        class AthmosphereCallback : public osg::NodeCallback
        {
        public:
                AthmosphereCallback(void)
                {

                }

                virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
                {
                        osgUtil::CullVisitor* cv = dynamic_cast<osgUtil::CullVisitor*>(nv);        
                        osg::ref_ptr<osg::Geode> geometry = dynamic_cast<osg::Geode*> (node);

                        if(geometry && cv)
                        {
                                osg::Matrixd view(cv->getCurrentCamera()->getViewMatrix());
                                osg::Matrixd invViewMatrix = osg::Matrixd::inverse(view);
                                osg::Matrixd modelview(*cv->getModelViewMatrix());
                                osg::Matrixd model = modelview*invViewMatrix;
                                osg::Matrixd proj(cv->getCurrentCamera()->getProjectionMatrix());
                
                                geometry->getOrCreateStateSet()->getUniform("ModelMatrix")->set(model);
                                geometry->getOrCreateStateSet()->getUniform("ViewMatrix")->set(view);
                                geometry->getOrCreateStateSet()->getUniform("ProjectionMatrix")->set(proj);             
                        
                                geometry->getOrCreateStateSet()->getUniform("light_mv_matrix")->set(Scene::GetLightCamera()->getViewMatrix());                  
                        }
                        traverse(node, nv);
                }
        };

        class Atmosphere
        {
        public:
                Atmosphere(void);
                virtual ~Atmosphere(void)=0;

                virtual void Initialize() = 0;

                osg::ref_ptr<osg::Geode> GetNode();             
                
                void SetFog(Fog* fog);

        protected:                              
                Fog* m_fog;

                osg::ref_ptr<osg::StateSet> nodessSkydome;
                osg::ref_ptr<osg::Geode> athmosphere;
        };
}