DtFxOsgParticleDrawable.h

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/******************************************************************************
** Copyright (c) 2020 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);
      
      virtual ~DtFxOsgParticleDrawable();
   private:
      DtFxOsgParticleDrawable(const DtFxOsgParticleDrawable& rhs, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY) = delete;

      DtFxOsgParticleDrawable& operator=(const DtFxOsgParticleDrawable& rhs) = delete;
   public:

      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;

      virtual void setWireframeMode(bool mode);

      virtual osg::StateSet* particleSystemStateSet();

   protected:

      makVrv::DtDe & myDe;
      DtFxParticleSystemManager* myParticleManager;
      DtFxOglParticleSystemRenderer* myParticleRenderer;

      osg::ref_ptr<osg::StateSet> myStateSet;
      osg::ref_ptr<osg::StateSet> myDebugStateSet;

      osg::ref_ptr<osg::Shader> myVertexShader;
      osg::ref_ptr<osg::Shader> myFragmentShader;
      osg::ref_ptr<osg::Program> myDefaultProgram;

      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;
      mutable osg::ref_ptr<osg::Uniform> myMutableFogFroxelActiveUniform;
      mutable osg::ref_ptr<osg::Uniform> myMutableFogFroxelMaxDistanceUniform;


   };

}