DtFxOsgParticleDrawable.h

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/******************************************************************************
** Copyright (c) 2019 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/Program>
class diguyScenario;

namespace makVrv
{
   class DtDe;
   class DtFxParticleSystemManager;
   class DtFxOglParticleSystemRenderer;

   class DtFxOsgParticleDrawable : public osg::Drawable
   {
   public:
      DtFxOsgParticleDrawable(makVrv::DtDe& de, DtFxParticleSystemManager* pm, osg::MatrixTransform* transform);
      
      virtual ~DtFxOsgParticleDrawable() {}

      virtual void releaseGLObjects(osg::State* state) const;

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

      virtual osg::BoundingBox computeBoundingBox() const;

      // needed by manager
      virtual osg::MatrixTransform* baseTransform();

      virtual void setWireframeMode(bool mode);

   protected:

      makVrv::DtDe & myDe;
      DtFxParticleSystemManager* m_particle_manager;
      DtFxOglParticleSystemRenderer* m_particle_renderer;
      osg::ref_ptr<osg::MatrixTransform> m_base_transform;
      osg::ref_ptr<osg::StateSet> m_state_set;
      osg::ref_ptr<osg::StateSet> m_debug_state_set;
      osg::ref_ptr<osg::Shader> m_vertex_shader;
      osg::ref_ptr<osg::Shader> m_fragment_shader;
      osg::ref_ptr<osg::Program> m_default_program;
      mutable osg::ref_ptr<osg::Uniform> myMutableInvPersMatrixUniform;
      mutable osg::ref_ptr<osg::Uniform> myMutablePersMatrixUniform;
      mutable osg::ref_ptr<osg::Uniform> myMutableViewportUniform;
      mutable osg::ref_ptr<osg::Uniform> myMutableIsReflectionUniform;

   private:
      DtFxOsgParticleDrawable(const DtFxOsgParticleDrawable& rhs, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY) :
         osg::Drawable(rhs, copyop),
         myDe(rhs.myDe)
      {}

      DtFxOsgParticleDrawable& operator=(const DtFxOsgParticleDrawable& other);
   };

}