DtGroundFogEffectDrawable.h

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/****************************************************************************** 
** Copyright (c) 2020 MAK Technologies, Inc. 
** All rights reserved. 
******************************************************************************/ 


#pragma once

#include <osg/Camera>
#include <osg/Drawable>

#include <vrvCore/DtDe.h>

#include <vrvOsg/DtGroundFogEffect.h>
#include <vrvOsg/DtOsgCullVisitor.h>
#include <vrvOsg/vrvOsg.h>

#include <vrvUtil/DtVirtualBaseClass.h>


namespace makVrv
{
   // Forward declarations.
   class DtGroundFogGroup;


   class DT_DLL_VRVOSG DtGroundFogEffectDrawable : public osg::Drawable
   {
   public:

      DtGroundFogEffectDrawable(makVrv::DtDe& de, DtGroundFogGroup* groundFogGroup);

      DtGroundFogEffectDrawable(const DtGroundFogEffectDrawable& orig, const osg::CopyOp& opr);

      virtual ~DtGroundFogEffectDrawable();

   private:

      DtGroundFogEffectDrawable();

      DtGroundFogEffectDrawable(const DtGroundFogEffectDrawable &other);

      DtGroundFogEffectDrawable &operator=(const DtGroundFogEffectDrawable &other);

   public:

      virtual osg::Object* clone(const osg::CopyOp& copyop) const { return new DtGroundFogEffectDrawable(*this, copyop); }
      virtual osg::Object* cloneType() const { return NULL; }

      virtual bool init();

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

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

      virtual void applyState(DtGroundFogEffect::DrawData& drawData) const;

      virtual void setWind(float windDirectionRad, float windSpeedMps);

   protected:

      virtual bool loadShaders();

      virtual void connectSignals();

      virtual void disconnectSignals();

      virtual void slot_reloadShaders();

      virtual void setupSoftness(osg::Camera* camera) const;

   protected:
      
      DtDe& myDe;
      DtGroundFogGroup* myGroundFogGroup;

      bool myInitialized;

      float myWindDirectionRad;
      float myWindSpeedMps;

      osg::ref_ptr<osg::Texture> myParticleTexture;
      osg::ref_ptr<osg::StateSet> myStateSet;

   private:

      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> myMutableSoftnessUniform;

      // ground fog specific
      mutable osg::ref_ptr<osg::Uniform> myMutableViewMatrixInvUniform;
   };


   class DT_DLL_VRVOSG DtGroundFogEffectDrawableCreator : public DtVirtualBaseClass
   {
   public:
      DtGroundFogEffectDrawableCreator(DtDe &de);

      virtual ~DtGroundFogEffectDrawableCreator();

   private:
      DtGroundFogEffectDrawableCreator(const DtGroundFogEffectDrawableCreator& other);
      DtGroundFogEffectDrawableCreator &operator=(const DtGroundFogEffectDrawableCreator& other);

   public:
      virtual DtGroundFogEffectDrawable* create(DtGroundFogGroup* groundFogGroup) const;

      static DtGroundFogEffectDrawableCreator& instance(DtDe& de);

      static const std::string& theClassName();

   protected:
      DtDe& myDe;
   };
}