DtDiGuyInstanceDrawable.h

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/****************************************************************************
 * Copyright (c) 2020 VT MAK
 * All rights reserved.
 ****************************************************************************/


#pragma once

#include <osg/MatrixTransform>
#include <osg/Drawable>
#include <tbb/concurrent_vector.h>

#include <vrvOsg/DtOsgTextureBufferObjectApplyAttribute.h>

namespace makVrv
{
   class DtDiGuyScenario;
   class DtDiGuyOsgGraphicsInstanceGroup;
   class DtGlTextureBufferObject;

   class DtDiGuyInstanceDrawable : public osg::Drawable
   {

   public:
      DtDiGuyInstanceDrawable();
      
      virtual ~DtDiGuyInstanceDrawable();

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

      virtual void reset();

      virtual void addDrawable(DtDiGuyOsgGraphicsInstanceGroup* drawable);

      virtual void drawImplementation(osg::RenderInfo& renderInfo) const;

      virtual void copy_tbo_data(const int& num_floats, const float* data);
   
   protected:
      //Setup  the texture buffer object for the instanced diguys
      virtual void setupTextureBufferObject();

   protected:
      mutable tbb::concurrent_vector< DtDiGuyOsgGraphicsInstanceGroup*> myDrawables;
      mutable tbb::concurrent_vector< DtDiGuyOsgGraphicsInstanceGroup*> myTransparentDrawables;

      mutable osg::Vec3d myMutableCameraPosition;
      osg::ref_ptr<osg::StateAttribute> myShaderProgram;

      mutable DtGlTextureBufferObject* m_diguy_texture_buffer;
      osg::ref_ptr<TextureBufferObjectApplyAttribute> m_diguy_texture_buffer_attribute;

      mutable bool m_ready_for_clear;

   private:
      DtDiGuyInstanceDrawable(const DtDiGuyInstanceDrawable& ob, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY) = delete;


      virtual osg::Object* clone(const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY) const ;

   };
}