diguyOsgParticleRenderer.h

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#pragma  once

#include <osg/Drawable>
#include <osg/Geode>
#include <osg/State>
#include <osg/StateSet>

class diguyScenario;

// Now the OSG wrapper for the above OpenGL code, the most complicated bit is computing
// the bounding box for the above example, normally you'll find this the easy bit.
class diguyOsgParticleRenderer : public osg::Drawable
{
public:
   diguyOsgParticleRenderer() : m_scenario(NULL){
      ;
   } 
   diguyOsgParticleRenderer(diguyScenario * scenario) : m_scenario(scenario)
   {
      setUseDisplayList(0);
      setUseVertexBufferObjects(0);
      m_state_set = new osg::StateSet();
      m_state = new osg::State();
   }

   // the draw immediate mode method is where the OSG wraps up the drawing of
   // of OpenGL primitives.
   virtual void drawImplementation(osg::RenderInfo& renderInfo) const;


   // we need to set up the bounding box of the data too, so that the scene graph knows where this
   // objects is, for both positioning the camera at start up, and most importantly for culling.
   virtual osg::BoundingBox computeBound() const;

   static osg::Geode* createParticleRenderer(diguyScenario * scenario);

// FIXME I have no idea how this works:
   diguyOsgParticleRenderer(const diguyOsgParticleRenderer& teapot,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY):
   osg::Drawable(teapot,copyop) {}

   META_Object(myTeapotApp,diguyOsgParticleRenderer)



protected:

   virtual ~diguyOsgParticleRenderer() {}

   diguyScenario * m_scenario;
   osg::ref_ptr<osg::State> m_state;
   osg::ref_ptr<osg::StateSet> m_state_set;

};