DtOsgOcclusionQueryNode.h

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


#pragma once

#include <vrvOsg/vrvOsg.h>

#include <osg/OcclusionQueryNode>

#include <osgEarth/CullingUtils>

#include <OpenThreads/Mutex>

namespace osg
{
   class Group;
}

namespace makVrv
{
   class DT_DLL_VRVOSG DtOsgOcclusionQueryNode : public osg::OcclusionQueryNode
   {
   public:
      DtOsgOcclusionQueryNode();
      DtOsgOcclusionQueryNode(const DtOsgOcclusionQueryNode & lhs, const osg::CopyOp& copyop);
      META_Node(makVrv, DtOsgOcclusionQueryNode);

      virtual void traverseDebug(osgUtil::CullVisitor& cv);
      virtual size_t calcPathHash(osg::NodeVisitor& nv);
      virtual void traverseQuery(const osg::Camera* camera, osgUtil::CullVisitor& cv);
      virtual bool getPassed(const osg::Camera* camera, osg::NodeVisitor& nv);

      virtual void releaseGLObjects(osg::State* state) const;
      
   protected:
      virtual ~DtOsgOcclusionQueryNode();
      virtual void initializeGlobalStateIfNecessary(void);
   protected:
      static int theInitializerValue;
   };

   class DT_DLL_VRVOSG DtOsgOcclusionQueryNodeUI
   {
   public:
       static void addImgui(osg::Group * renderRoot);
       static void addImguiOcclusionCullingStats();
   };

   class DT_DLL_VRVOSG DtOsgOcclusionQueryNodeFactory : public osgEarth::OcclusionQueryNodeFactory
   {
   public:
      DtOsgOcclusionQueryNodeFactory() : myEnabled(true) {};
      
      virtual osg::Group * createQueryNode();
      
      virtual void setEnabled(bool enabled);

   protected:
      bool myEnabled;
   };
};