DtOsgCullVisitor.h

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/******************************************************************************
** Copyright (c) 2025 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 DtCoordinateSystem;
   class DtSkyObjectManager;

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

      DtOsgCullVisitor(const DtOsgCullVisitor& rhs);
   protected:

      virtual ~DtOsgCullVisitor();

   private:
      DtOsgCullVisitor() = delete;
      DtOsgCullVisitor& operator=(DtOsgCullVisitor& rhs) = delete;
   public:
      virtual void initializeViewDependentSettings();

      virtual void setMaximumMagnificationAngle(double angleRadians);

      virtual double maximumMagnificationAngle() const;

      virtual bool orthoCulling() const;

      virtual bool coordinateSystemChanged() const;

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

      virtual float altitude2D() const;

      virtual const DtOsgCullVisitorParameters* visitorParameters() const;

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

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

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

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

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

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

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

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

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

      virtual void preCull();

   protected:

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

      virtual DtOsgCullVisitorParameters* getVisitorParameters() const;

      virtual osgUtil::CullVisitor* clone() const;

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

      virtual 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 myIsInTerrain;

      DtSignalConnectionManager myConnections;

      DtCoordinateSystem* myCoordinateSystem = nullptr;

      double myMaximumMagnificationAngle;

      DtSkyObjectManager& mySkyObjectManager;

      bool myHasCurrentCamera;
      osg::Matrix myCurrentCameraViewMatrixI;
      osg::Matrix myMainCameraViewMatrixI;
   };
}