DtIndirectGeometryAggregator.h

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/******************************************************************************
** Copyright (c) 2018 VT-MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <vrvOsg/vrvOsg.h>

#include <vrvOsg/DtIndirectGeometryTextures.h>
#include <vrvOsg/DtIndirectGeometryTexturesPointers.h>

#include <vrvIndirectRendering/DtGeometrySpecification.h>
#include <vrvIndirectRendering/DtMaterial.h>

#include <osg/NodeVisitor>
#include <osg/Geometry>

#include <stack>

namespace osg
{
   class Texture;
}

namespace makVrv
{
   class DtIndirectTextureCollectionPolicy;

   class DT_DLL_VRVOSG DtIndirectGeometryAggregator : public osg::NodeVisitor
   {
   public:
      DtIndirectGeometryAggregator(osg::ref_ptr<osg::Geometry> aggregatedGeometry
         , VectorGeometryLocations& locations
         , VectorMaterials& materials
         , VectorOsgTextures& textures
         , const DtLodInfo& lodInfo
         , const DtIndirectTextureCollectionPolicy& textureCollectionPolicy
         , const std::string& modelFileName);

      virtual ~DtIndirectGeometryAggregator();

      virtual void apply(osg::Geometry& geometry);

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

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

      virtual bool geometryNotSupported(const osg::Geometry& geometry) const;

      virtual int numGeodes() const;

      virtual int numGeometries() const;

   protected:
      virtual DtMaterial findMaterial(osg::StateSet* ss);

      virtual bool findCullFaceEnabled(osg::StateSet* ss);

   protected:
      int myNumGeodes;
      int myNumGeometries;

      // references to externally passed in specs, texture, materials
      // traversal via this visitor will augment
      VectorGeometryLocations& myLocations;
      VectorMaterials& myMaterials;
      VectorOsgTextures& myTextures;
      osg::ref_ptr<osg::Geometry> myAggregatedGeometry;

      std::stack<DtIndirectGeometryTexturesPointers> myTextureStack;

      std::stack<DtMaterial> myMaterialStack;

      std::stack<bool> myCullFaceEnabledStack;

      const DtLodInfo myLodInfo;

      const DtIndirectTextureCollectionPolicy& myTextureCollectionPolicy;

      // used only for outputting debug messages
      const std::string myModelFileName;

      static const DtMaterial theDefaultMaterial;
   private:
      DtIndirectGeometryAggregator();
   };
}