DtOsgCullVisitor.h

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/******************************************************************************
** Copyright (c) 2022 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <vrvOsg/vrvOsg.h>
#include <vrvOsg/DtOsgCullVisitorParameters.h>
#include <vrvUtil/signalslib.h>
#include <vrvUtil/DtSignalConnectionManager.h>

namespace makVrv
{
   class DtOsgOcclusionQueryNode;
   class DtCoordinateSystem;

   class DT_DLL_VRVOSG DtOsgCullVisitor : public osgUtil::CullVisitor
   {
   public:
      DtOsgCullVisitor(DtDe& de);

      DtOsgCullVisitor(const DtOsgCullVisitor&);

   protected:

      virtual ~DtOsgCullVisitor();

   public:
      void initializeViewDependentSettings();

      bool orthoCulling() const;

      bool coordinateSystemChanged() const;

      virtual float getDistanceToScreenEdge(const osg::Vec3& vec) const;

      virtual float altitude2D() const;

      const DtOsgCullVisitorParameters* visitorParameters() const;

      void setInReflectionPass(bool bReflecting) { myIsInReflectionPass = bReflecting; }
      bool inReflectionPass(void) const { return myIsInReflectionPass; }

      const DtDe& de(void) const;

      DtDe& de(void);

      virtual void apply(osg::Transform& node);

      virtual void apply(osg::Node& node);

      virtual void apply(osg::Group& group);

      virtual void apply(osg::LightSource& lightSource);

      virtual void apply(osg::Geode& geode);

      virtual void apply(osg::Camera& node);

      virtual void apply(osg::Billboard& node);

      virtual void apply(osg::PagedLOD& node);

      virtual void apply(osg::OcclusionQueryNode& node);

      virtual bool isCulled(osg::Node& node, double scaleFactor);

   protected:

      virtual float getDistanceToViewPoint(const osg::Vec3& vec, bool useLOD) const;

      virtual float calculateFocusPointDistance(const osg::Vec3& vec, bool useLOD, float magVal) const;


      DtOsgCullVisitorParameters* getVisitorParameters() const;

      virtual osgUtil::CullVisitor* clone() const;

      virtual void reset();

      virtual bool isOcean(const osg::Node* node) const;

      void slot_StateSetChanged(const osg::StateSet* pStateSet);

      virtual void slot_coordinateSystemChanged();


   protected:
      DtOsgCullVisitorParameters* myInfoCopy;
      double myAltitude2D;
      double myAltitude3D;
      osg::Matrix myWorldToWindowMatrix;
      DtDe& myDe;

      boost::signalslib::connection m_signalConnection;

      bool myIsInReflectionPass;
      bool myIsInTerrain;

      DtSignalConnectionManager myConnections;

      DtCoordinateSystem* myCoordinateSystem = nullptr;
      double myMaximumMagnificationAngle;

   };
}