DtOsgRenderer.h

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/*******************************************************************************
** Copyright (c) 2016 MAK Technologies, Inc.
** All rights reserved.
*******************************************************************************/


#pragma once

#include <vrvOsg/vrvOsg.h>

#include <vrvCore/DtRenderer.h>

#include <vrvOsg/DtInstancedCullSet.h>
#include <vrvOsg/DtSceneRoot.h>

#include <osgUtil/RenderBin>
#include <osgViewer/Viewer>
#include <vector>
#include <string>

namespace osg
{
   class Group;
   class Node;
   class Camera;
}

namespace osgShadow
{
   class ShadowedScene;
}

namespace osgEarth
{
   class MapNode;
}

namespace makVrv 
{
   class DtStatsSet;
   class DtChannel;
   class DtOsgChannel;
   class DtEffectManager;
   class DtFontManager;
   class DtOsgWindowManager;
   class DtOsgProfilerOverlay;
   class DtOsgPerformanceStatsOverlay;
   class DtFastMatrixTransform;
   class DtSceneGraph;
   //class DtOsgLightingComponent;
   class DtOsgGlobalShaderComponent;
   class DtShadowSettingsObject;
   class DtTaxiwaySignManager;
   class DtRunwayMarkingManager;
   class DtLightIndicatorManager;

   class DT_DLL_VRVOSG DtOsgRenderer : public DtRenderer
   {
   public:
      friend class DtSceneGraph;
      friend class DtOsgRendererCreator;
      friend class DtSceneGraphTreeLogic;

      //Render bin definitions.
      const static int SKY_RENDERBIN    = -10;
      const static int DEFAULT_RENDERBIN = 0;
      const static int DEPTH_ONLY_RENDERBIN = 6;
      const static int OCEAN_RENDERBIN = 7;
      const static int LIGHTPOINT_RENDERBIN = 8;
      const static int CLOUD_RENDERBIN = 9;
      const static int DEFAULT_TRANSPARENT_RENDERBIN = 10;
      const static int COCKPIT_RENDERBIN    = 25;

      //Render bin names
      static const std::string SkyBin;
      static const std::string DepthOnlyBin;
      static const std::string OceanBin;
      static const std::string LightPointBin;
      static const std::string CloudBin;
      static const std::string CockpitBin;

      static DtOsgRenderer* findInstance(DtDe& de);

      virtual ~DtOsgRenderer();

      virtual void update();      
      
      virtual void render();

      virtual bool viewExists() const;

      virtual void resetSceneGraph();

      virtual void removeChannelRoot(DtChannel* channel);

      virtual void addNodeToRoot(osg::Node* node, const DtSceneRoot& sr, bool createOnAccess=true );

      virtual void removeNodeFromRoot(osg::Node* node, const DtSceneRoot& sr);

      virtual void traverseRoot(osg::NodeVisitor& nv, const DtSceneRoot& sr);  
  
      virtual void setSceneRootNodeMask(const DtSceneRoot& sr, 
         osg::Node::NodeMask nodemask);

      virtual osg::Node::NodeMask sceneRootNodeMask(const DtSceneRoot& sr);

      virtual osg::BoundingSphere sceneRootBound(const DtSceneRoot& sr);

      virtual osg::BoundingSphere sceneRootListBound(const DtSceneRootList& srList);

      virtual void addChannelToModelSetRoot( int modelSetId, 
         DtChannel* channel );

      virtual void removeChannelFromModelSetRoot( int modelSetId, 
         DtChannel* channel );
   
      virtual void addChannelToVisualizerRoot( int modelSetId, 
         int visualizerType, DtChannel* channel );

      virtual void removeChannelFromVisualizerRoot( int modelSetId, 
         int visualizerType, DtChannel* channel );

      virtual void setSceneDataToRenderRoot( osgViewer::View& view );

      virtual void addSceneToCamera(osg::Camera* camera);

      virtual void addSceneRootToNode(const DtSceneRoot& sr, 
         osg::Group* node, bool createOnAccess=true);
      
       virtual osg::Group* findSceneRootChildByName( const DtSceneRoot& parent, 
          const std::string& rootName );

       virtual bool matchesSceneRoot(const DtSceneRoot& sr, osg::Group* group );

      virtual void releaseResources()
      {
         releaseResources(0);
      }

      virtual void releaseResources(osg::State* state);

      void setRootNode(osg::Group*,bool copyChildrenFromOldRoot);

      void resetRoot();

      void registerPagedLODs(osg::Node* node);

      void clearPagedLODs();

      virtual void setPerformanceStatsOverlayEnabled(bool show);

      virtual bool performanceStatsOverlayEnabled() const;

      virtual void setProfilerOverlayEnabled(bool show);

      virtual bool profilerOverlayEnabled() const;

      virtual void setWireframeRendering(bool enabled);

      virtual void setDdsFlip(bool flip);

      virtual bool wireframeRendering() const;

      virtual void setShadowState(bool enabled);

      virtual bool shadowsEnabled() const;

      void setTerrainScalingEnabled( bool enabled );

      void setTerrainScaleFactor( double scaleFactor );

      virtual bool makeContextCurrent();

      DtFontManager& fontManager();
      const DtFontManager& fontManager() const;

      DtEffectManager& effectManager();
      const DtEffectManager& effectManager() const;
      
      boost::signal< void ( int modelSet, int visualType ) > signal_visualizerRootAdded;
      boost::signal< void ( DtChannel* ) > signal_channelRootAdded;
      
      void debugDrawBox(const osg::Vec3& center, const osg::Vec3& extents);

      void debugDrawBox(const osg::Vec3& center, const osg::Vec3& extents, const osg::Quat& orientation);

      void setChannelShadowState(DtOsgChannel* osgChannel, bool enable);

     bool getChannelShadowSettings(DtOsgChannel* osgChannel, DtShadowSettingsObject** shadowSettingObject, bool* isPlanView);

     bool getChannelCloudShadowMap(DtOsgChannel* osgChannel, unsigned int* textureIndex, osg::Matrix* textureViewProjMatrix);

     bool getCameraCloudShadowMap(osg::Camera* camera, unsigned int* textureIndex, osg::Matrix* textureViewProjMatrix);
     
      osg::StateSet* sgRenderRootStateSet();

      // structure to expedite culling. We need to clear any memory
      // that this structure caches to decrement reference count of 
      // StateSets (and hence drawables, textures, etc) when scene
      // changes completely (e.g. on post processor turned off/on)
      // so that memory can be reclaimed
      // This helper function accomplishes that
      void clearStateGraphForAllChannels(void);
   public:
      //@ {
      static DtSceneRoot renderRoot();
      static DtSceneRoot environmentRoot();
      static DtSceneRoot terrainRoot();   
      static DtSceneRoot propRoot();   
      static DtSceneRoot modelSetRoot(int modelSet) 
         { return DtSceneRoot(modelSet); }
      static DtSceneRoot visualizerTypeRoot(int modelSet, int visualizerType) 
         { return DtSceneRoot(modelSet, visualizerType); }
      static DtSceneRoot channelRoot(int modelSet, DtChannel* channel) 
         { return DtSceneRoot(modelSet, channel); }
      //@ }

   protected:

      virtual void moveRootToShadowRoot( const DtSceneRoot& targetRoot, 
         osg::Group* shadowRoot, osg::Group* modelSetRoot );

      virtual osgViewer::ViewerBase& viewer();

      DtOsgRenderer(DtDe& de);
      
      osg::Group* sgRenderRoot();
      
      osg::Group* sgEnvironmentRoot();

      osg::Group* sgPropsRoot();

      osg::Group* sgTerrainRoot();

      osg::Group* sgScaledTerrainRoot();

      osg::Group* sgScaledPropsRoot();
      
      osg::Group* sgModelSetRoot( int modelSet );

      osg::Group* sgVisualizerRoot( int modelSet, int visualizerType,
         bool createOnAccess=true );
      
      osg::Group* sgChannelRoot( int modelSet,
         DtChannel* channel, bool createOnAccess=true );

      void slot_onViewCreated();

      void slot_onViewToBeDestroyed();

      void slot_onWireframeModeChanged(bool mode);

      void slot_onDdsFlipChanged(bool flip);

      virtual void slot_onProfilerOverlayOnChanged(bool mode);

      virtual void slot_onPerformanceStatsOverlayOnChanged(bool mode);

      void slot_onShadowStateChanged(bool shadowMode);

      void slot_onTerrainScalingEnabledChanged( bool enabled );

      void slot_onTerrainScaleFactorChanged( double scaleFactor );
 
      void slot_onCoordinateSystemChanged(const std::string& coordinateSystemType);

      void advanceTime();

      void updateSceneGraph();

      void clearEmptyWindows();

      virtual void removeShadows();

      virtual void createShadowRoots();

      virtual bool exportTerrainAndProps(const std::string&);
      
      virtual osg::Group* createModelSetRoot( int modelSet );
      virtual osg::Group* createVisualizerRoot( int modelSet, 
         int visualizer );
      
      virtual osg::Group* createChannelRoot( int modelSet, DtChannel* );
     
      virtual osgShadow::ShadowedScene* 
         createModelSetSpecificShadowRootAndScene( int modelSet );
      virtual osg::Group* modelSetSpecificShadowRoot( int modelSet );
      virtual osgShadow::ShadowedScene* 
         modelSetSpecificShadowScene( int modelSet );

      virtual void updateTerrainScaling();

      virtual void initAerodromeManagers();
      virtual void updateAerodrome();

      // replace currentChild in all its parents with newChild
      void swapChildren( osg::Node* currentChild, osg::Node* newChild );

      virtual void updateRenderMap( const CullSet& cullSet );

      void postInitialize();

   protected:
      DtSceneGraph* mySceneGraph;

      DtFontManager*  myFontManager;
      DtEffectManager* myEffectManager;

      DtOsgWindowManager* myOsgWindowManager;

      osg::ref_ptr<osgViewer::Viewer> myDefaultViewer;
      
      // This the top of the render graph
      osg::ref_ptr<osg::Group> myRenderRoot;
      osg::ref_ptr<osg::Group> myDebugRoot;

      osg::ref_ptr<osg::Geode> myDebugBox;
    
      // This goes directly below the root, and sets the environment (such as sky)
      osg::ref_ptr<osg::Group> myEnvironmentRoot;
   
      // attached under each modelset root, terrains are placed here
      osg::ref_ptr<osg::Group> myTerrainRoot;
   
      // attached under each modelset root,  props are placed here
      osg::ref_ptr<osg::Group> myPropsRoot;
      
      // when terrain scaling is enabled, this is placed above the
      // terrain root
      osg::ref_ptr<DtFastMatrixTransform> myScaledTerrainRoot;

      // when terrain scaling is enabled, this is placed above the
      // props root
      osg::ref_ptr<DtFastMatrixTransform> myScaledPropsRoot;

      osg::Matrix myScaleMatrix;
      
      // shadows and visual type roots are done one per model set
      typedef boost::unordered_map<int, osg::ref_ptr<osg::Group> > RootMap;
      typedef boost::unordered_map<int, osg::ref_ptr<osgShadow::ShadowedScene> > ShadowedSceneMap;
      
      typedef int ModelSet;
      typedef int VisualizerType;

      // There is one group for each model set, which is either an osg::Group
      // or a DtChannelSpecificGroup
      typedef boost::unordered_map<ModelSet, osg::ref_ptr<osg::Group> >
         ModelSetRootMap;

      typedef boost::unordered_map<VisualizerType, osg::ref_ptr<osg::Group> > 
         VisualizerTypeRootMap;
      
      typedef boost::unordered_map<ModelSet, VisualizerTypeRootMap> 
         ModelSetVisualizerTypeRootMap;
      
      
      // This is a map of the model set  roots.  CWhen a channel uses a model set 
      // (or more correctly, when a channel's observer uses a model set) the
      // channel subscribes to the appropriate one of these
      ModelSetRootMap myModelSetMap;
      
      // Under each model set root is a root for each visualizer type.  This map
      // provides another map, by model set, of the roots for each visual type
      ModelSetVisualizerTypeRootMap myVisualizerRootMap;

      // This is a map of channel roots by model set.  Each channel root is a unique
      typedef boost::unordered_map<DtChannel*, ModelSetRootMap >
         ChannelRootMap;

      ChannelRootMap myChannelRootMap;
      ShadowedSceneMap myShadowedSceneMap;
      RootMap myShadowRootMap;
      
      osg::ref_ptr<osgUtil::RenderBin> mySkyBin;
      osg::ref_ptr<osgUtil::RenderBin> myDepthOnlyBin;
      osg::ref_ptr<osgUtil::RenderBin> myOceanBin;
      osg::ref_ptr<osgUtil::RenderBin> myLightPointBin;
      osg::ref_ptr<osgUtil::RenderBin> myCloudBin;
      osg::ref_ptr<osgUtil::RenderBin> myCockpitBin;

      bool myWireframeOn;
      bool myShadowsEnabled;

      DtOsgProfilerOverlay* myProfilerOverlay;
      DtOsgPerformanceStatsOverlay* myPerformanceStatsOverlay;

      DtTaxiwaySignManager* myTaxiwaySignManager;
      DtRunwayMarkingManager* myRunwayMarkingManager;
      DtLightIndicatorManager* myLightIndicatorManager;

      double myTerrainScaleFactor;
      bool myTerrainScaleFactorChanged;
      bool myTerrainScalingEnabled;
      bool myTerrainScalingEnabledChanged;
      bool myResourcesReleased;

   protected:
      static DtSceneRoot theRenderRoot; 
      static DtSceneRoot theEnvironmentRoot; 
      static DtSceneRoot theTerrainRoot; 
      static DtSceneRoot thePropRoot; 

   };

   class DT_DLL_VRVOSG DtOsgRendererCreator : public DtRendererCreator
   {
   public:

      virtual DtRenderer* create(DtDe& de);
   };
}