DtLightPointAggregator.h

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

#pragma once

#include <vrvOsg/vrvOsg.h>
#include <vrvOsg/DtLightPointNode.h>
#include <vrvOsg/DtLightPointPerNodeData.h>
#include <vrvOsg/DtLightPointNodeAndXform.h>

#include <vrvUtil/DtVirtualBaseClass.h>

#include <osg/ref_ptr>
#include <osg/NodeVisitor>

#include <map>

namespace makVrv
{
   class DT_DLL_VRVOSG DtLightPointAggregator : public osg::Referenced
   {
   public:
      DtLightPointAggregator();

      virtual ~DtLightPointAggregator();

   private:
      DtLightPointAggregator(const DtLightPointAggregator &other) = delete;
      DtLightPointAggregator &operator=(const DtLightPointAggregator &other) = delete;

   public:
      virtual DtLightPointPerNodeData aggregate(
         int nodeGroupId,
         bool daylightControlled,
         const DtIndirectFadeParameters& fadeParameters,
         const DtLightPointNodeAndXform& nodeAndXform,
         bool combineLightPoints,
         bool& newNode);

   protected:
      struct DtLightPointDivisionTuple
      {
         DtLightPointDivisionTuple(int nodeGroupId,
                                   bool daylightControlled,
                                   const DtIndirectFadeParameters& fadeParameters,
                                   const DtLightPointNodeAndXform& nodeAndXform);

         int myNodeGroupId;  // for separating by group ID
         bool myDaylightControlled; // for separating by daylightControlled
         DtIndirectFadeParameters myFadeParameters; // for separating by fade parameters
         DtLightPointNodeAndXform myNodeAndXform;   // Dof/Lod/Switch stacks and pointer
      };

      struct CmpLightPointTuple
      {
         bool operator()(const DtLightPointDivisionTuple& lhs, const DtLightPointDivisionTuple& rhs) const;
      };

      // This structure is a map instead of a hash_map since it isn't expected for there
      // to be many things in it.  Maps are often faster for small sets.
      typedef std::map<DtLightPointDivisionTuple, DtLightPointPerNodeData,
                       CmpLightPointTuple> DtLightNodeMap;
   protected:
      DtLightNodeMap myLightNodeMap;  // maps the division tuple to the aggregation nodes
   };

} // namespace makVrv