diguyOsgParticleRenderer.h

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/****************************************************************************
 * Copyright (c) 2024 MAK Technologies, Inc.
 * All rights reserved.
 ****************************************************************************/

#pragma once

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

class diguyScenario;

class diguyOsgParticleRenderer : public osg::Drawable
{
public:
   diguyOsgParticleRenderer() : m_scenario(NULL){
      ;
   }
   diguyOsgParticleRenderer(diguyScenario * scenario);

   diguyOsgParticleRenderer(const diguyOsgParticleRenderer& teapot,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY):
   osg::Drawable(teapot,copyop) {}

   META_Object(myTeapotApp, diguyOsgParticleRenderer);

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

#if OSG_MIN_VERSION_REQUIRED(3,4,0)

   virtual osg::BoundingSphere computeBound() const;
#else
   // 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;
#endif

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

protected:

   virtual ~diguyOsgParticleRenderer() {}

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