class OSGDB_EXPORT osgDB::DatabasePager

Database paging class which manages the loading of files in a background thread, and syncronizing of loaded models with the main scene graph

Inheritance:

Public Methods

DatabasePager()

virtual void requestNodeFile(const std::string& fileName, osg::Group* group)

Add a request to load a node file to end the the database request list

virtual void run()

run does the database paging

void addLoadedDataToSceneGraph(double timeStamp)

Add the loaded data to the scene graph

void registerPagedLODs(osg::Node* subgraph)

Find all PagedLOD nodes in a subgraph and register them with the DatabasePager so it can keep track of expired nodes.

void setExpiryDelay(double expiryDelay)

Set the amount of time that a subgraph will be kept without being visited in the cull traversal before being removed

double getExpiryDelay() const

Get the amount of time that a subgraph will be kept without being visited in the cull traversal before being removed

void setDeleteRemovedSubgraphsInDatabaseThread(bool flag)

set whether the removed subgraphs should be deleted in the database thread or not

bool getDeleteRemovedSubgraphsInDatabaseThread() const

get whether the removed subgraphs should be deleted in the database thread or not

void removeExpiredSubgraphs(double currentFrameTime)

Iterate through the active PagedLOD nodes children removing children which havn't been visited since specified expiryTime.

void setCompileRenderingObjectsForContexID(unsigned int contextID, bool on)

Turn the compilation of rendering objects for specfied graphics context on (true) or off(false)

bool getCompileRenderingObjectsForContexID(unsigned int contextID)

Get whether the compilation of rendering objects for specfied graphics context on (true) or off(false)

void compileRenderingObjects(osg::State& state, double& availableTime)

Compile the rendering objects (display lists,texture objects, VBO's) on loaded subgraph.

Public Members

class OSGDB_EXPORT ReleaseTexturesAndDrawablesVisitor: public osg::NodeVisitor

Helper class used internally to force the release of texture objects and displace lists

typedef std::vector< osg::ref_ptr<osg::PagedLOD> > PagedLODList

typedef std::vector< osg::ref_ptr<osg::StateSet> > StateSetList

typedef std::vector< osg::ref_ptr<osg::Drawable> > DrawableList

typedef std::pair<StateSetList,DrawableList> DataToCompile

typedef std::map< unsigned int, DataToCompile > DataToCompileMap

typedef std::set<unsigned int> ActiveGraphicsContexts

Protected Fields

DatabaseRequestList _fileRequestList

OpenThreads::Mutex _fileRequestListMutex

DatabaseRequestList _dataToCompileList

OpenThreads::Mutex _dataToCompileListMutex

bool _deleteRemovedSubgraphsInDatabaseThread

osg::NodeList _childrenToDeleteList

OpenThreads::Mutex _childrenToDeleteListMutex

DatabaseRequestList _dataToMergeList

OpenThreads::Mutex _dataToMergeListMutex

PagedLODList _pagedLODList

double _expiryDelay

ActiveGraphicsContexts _activeGraphicsContexts

Protected Methods

virtual ~DatabasePager()

Protected Members

struct DatabaseRequest: public osg::Referenced

typedef std::vector< osg::ref_ptr<DatabaseRequest> > DatabaseRequestList

Documentation

Database paging class which manages the loading of files in a background thread, and syncronizing of loaded models with the main scene graph

DatabasePager()

virtual void requestNodeFile(const std::string& fileName, osg::Group* group)

Add a request to load a node file to end the the database request list

virtual void run()

run does the database paging

void addLoadedDataToSceneGraph(double timeStamp)

Add the loaded data to the scene graph

void registerPagedLODs(osg::Node* subgraph)

Find all PagedLOD nodes in a subgraph and register them with the DatabasePager so it can keep track of expired nodes. note, should be only be called from the update thread.

void setExpiryDelay(double expiryDelay)

Set the amount of time that a subgraph will be kept without being visited in the cull traversal before being removed

double getExpiryDelay() const

Get the amount of time that a subgraph will be kept without being visited in the cull traversal before being removed

void setDeleteRemovedSubgraphsInDatabaseThread(bool flag)

set whether the removed subgraphs should be deleted in the database thread or not

bool getDeleteRemovedSubgraphsInDatabaseThread() const

get whether the removed subgraphs should be deleted in the database thread or not

void removeExpiredSubgraphs(double currentFrameTime)

Iterate through the active PagedLOD nodes children removing children which havn't been visited since specified expiryTime. note, should be only be called from the update thread.

void setCompileRenderingObjectsForContexID(unsigned int contextID, bool on)

Turn the compilation of rendering objects for specfied graphics context on (true) or off(false)

bool getCompileRenderingObjectsForContexID(unsigned int contextID)

Get whether the compilation of rendering objects for specfied graphics context on (true) or off(false)

void compileRenderingObjects(osg::State& state, double& availableTime)

Compile the rendering objects (display lists,texture objects, VBO's) on loaded subgraph. note, should only be called from the draw thread.

typedef std::vector< osg::ref_ptr<osg::PagedLOD> > PagedLODList

typedef std::vector< osg::ref_ptr<osg::StateSet> > StateSetList

typedef std::vector< osg::ref_ptr<osg::Drawable> > DrawableList

typedef std::pair<StateSetList,DrawableList> DataToCompile

typedef std::map< unsigned int, DataToCompile > DataToCompileMap

typedef std::set<unsigned int> ActiveGraphicsContexts

virtual ~DatabasePager()

struct DatabaseRequest: public osg::Referenced

DatabaseRequest()

std::string _fileName

unsigned int _numOfRequests

osg::ref_ptr<osg::Group> _groupForAddingLoadedSubgraph

osg::ref_ptr<osg::Node> _loadedModel

DataToCompileMap _dataToCompileMap

typedef std::vector< osg::ref_ptr<DatabaseRequest> > DatabaseRequestList

DatabaseRequestList _fileRequestList

OpenThreads::Mutex _fileRequestListMutex

DatabaseRequestList _dataToCompileList

OpenThreads::Mutex _dataToCompileListMutex

bool _deleteRemovedSubgraphsInDatabaseThread

osg::NodeList _childrenToDeleteList

OpenThreads::Mutex _childrenToDeleteListMutex

DatabaseRequestList _dataToMergeList

OpenThreads::Mutex _dataToMergeListMutex

PagedLODList _pagedLODList

double _expiryDelay

ActiveGraphicsContexts _activeGraphicsContexts

This class has no child classes.

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