DtIndirectBuildingsVisitor.h

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/******************************************************************************
** Copyright (c) 2023 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <vrvOsgEarth/vrvOsgEarth.h>
#include <vrvOsgEarth/DtIndirectMetadataNode.h>
#include <vrvOsg/DtIndirectIndexedMultiSwitch.h>

namespace makVrv
{
   class DT_DLL_VRVOSGEARTH DtIndirectBuildingsVisitor : public osg::NodeVisitor
   {
   public:
      DtIndirectBuildingsVisitor(osg::ref_ptr<DtIndirectMetadataNode>& indirectMetadataNode);

      virtual ~DtIndirectBuildingsVisitor();

   private:
      DtIndirectBuildingsVisitor(const DtIndirectBuildingsVisitor& rhs ) = delete;

     DtIndirectBuildingsVisitor& operator=(const DtIndirectBuildingsVisitor& rhs) = delete;

   public:
      virtual void apply(DtIndirectIndexedMultiSwitch& node);
      virtual void apply(osg::Geode& node);
      virtual void apply(osg::Geometry& node);

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

   protected:
      // Precess the vertices in a merged mesh to determine which vertices belong to which feature.
      void ProcessVertices(osg::Geometry& geometry, DtIndirectIndexedMultiSwitch::DequeFeatureData& featureStack);

      // Process the indices in a merged mesh to determine which indices belong to which feature.
      void ProcessIndices(osg::Geometry& geometry, DtIndirectIndexedMultiSwitch::DequeFeatureData& featureStack);

   private:
      osg::ref_ptr<DtIndirectMetadataNode> myIndirectMetadataNode;

      DtIndirectIndexedMultiSwitch* myCurrentIndexedMultiSwitch = nullptr;
   };
}