DtOsgEarthTerrainSourceTracker Class Reference

Inheritance diagram for DtOsgEarthTerrainSourceTracker:

Public Member Functions
	DtOsgEarthTerrainSourceTracker (DtPagerCommandQueue *commandQueue, const osgEarth::Profile *profile, unsigned int lod)
virtual	~DtOsgEarthTerrainSourceTracker ()
virtual void	addPagedInTile (const osgEarth::TileKey tileKey, DtTileData *tileData)
	Adds a tileId and the corresponding tileData to myPagedInTiles.
virtual void	removePagedInTile (const osgEarth::TileKey tileKey)
	Removes a tileId and the corresponding tileData from myPagedInTiles.
virtual bool	dataAvailable (DtPagingMetaDataPtr metaData, DtTerrainPagingGeometryPtr geometry)
	Finds all tiles within geometry, and tests to see whether they have all been paged in already.
virtual void	pageInData (DtPagingMetaDataPtr metaData, DtTerrainPagingGeometryPtr geometry)
	Page in data within geometry.
virtual unsigned int	findOldestPagedData (unsigned int &numTrianglesOut)
	Finds the least-recently-used tile and set myOldestPagedObject to it.
virtual void	pageOutOldestData (const int priority)
	Adds a page out command for the least-recently-used tileID to myCommandQueue.
virtual void	drawDebugInfo (btIDebugDraw *debugDrawer)
	Draws the tile boundaries if we are drawing tile boundaries.
virtual bool	canPageOutData (unsigned int intersectId)
	Returns true if there is data that can be paged out.
Public Member Functions inherited from DtTerrainSourceTracker
	DtTerrainSourceTracker (DtPagerCommandQueue *commandQueue)
virtual	~DtTerrainSourceTracker ()
virtual void	addNodeToCollisionMapping (DtNodeId node, btCollisionObject *collisionObject)
virtual void	addNodesToCollisionMapping (DtNodeId node, DtCollisionObjectList *collObjList)
virtual void	removeNodeToCollisionMappings (DtNodeId node)
virtual std::list < btCollisionObject * >	collisionObjectsForNode (DtNodeId node)

Protected Member Functions
virtual DtPageInTilesCommand *	createPageInTilesCommand (DtPagingMetaDataPtr metaData)
virtual DtPageOutTilesCommand *	createPageOutTilesCommand (DtPagingMetaDataPtr metaData)
virtual void	tilesInGeometry (DtTerrainPagingGeometryPtr geometry, DtTileKeyList &tilesOut)
	Calls a tilesIn function based on the geometry's type.
virtual void	pageOutData (const DtTileKeyList tilesToRemove, const int priority)
	Creates a page out command with the given list of ids and adds it to the command queue.
virtual void	tilesUnderChord (const DtChord &chord, DtTileKeyList &tilesOut)
virtual void	tilesInSphere (const DtSphere &sphere, DtTileKeyList &tilesOut)
virtual void	tilesInShape (const DtLocalVertexList &vertices, DtTileKeyList &tilesOut)
virtual bool	dataAvailable (DtTileKeyList &keyList, const unsigned int intersectId=0)
virtual void	drawTile (btIDebugDraw *debugDrawer, const DtTileData &tileData)
osgEarth::TileKey::Direction	nextTileDirection (osgEarth::TileKey::Direction latDirection, osgEarth::TileKey::Direction lonDirection, bool isMostlyEastWest, double slope, double startX, double startY, double edgeX, double edgeY)
	Determine what direction the next tile under the chord is in, given the edge values in X and Y of the current tile.

Protected Attributes
DtPagedTilesMap	myPagedInTiles
	Map of tileIds to the id of the last intersect that required that tile.
std::set< osgEarth::TileKey >	myTilesPendingRemoval
osg::ref_ptr< const osgEarth::Profile >	myProfile
unsigned int	myLOD
osgEarth::TileKey *	myOldestPagedObject
bool	myRecomputeOldestPagedObject
Protected Attributes inherited from DtTerrainSourceTracker
DtPagerCommandQueue *	myCommandQueue
DtNodeToCollObjMMap	myNodeToCollObjMMap
tbb::spin_rw_mutex	myMutex

Constructor & Destructor Documentation

DtOsgEarthTerrainSourceTracker::DtOsgEarthTerrainSourceTracker	(	DtPagerCommandQueue *	commandQueue,
		const osgEarth::Profile *	profile,
		unsigned int	lod
	)

virtual DtOsgEarthTerrainSourceTracker::~DtOsgEarthTerrainSourceTracker ( )

virtual

Member Function Documentation

virtual void DtOsgEarthTerrainSourceTracker::addPagedInTile ( const osgEarth::TileKey  tileKey, DtTileData *  tileData  )

virtual

Adds a tileId and the corresponding tileData to myPagedInTiles.

Parameters

tileId	Key for the tileData passed in.
tileData	tileData to create the tileId -> tileData mapping with.

virtual void DtOsgEarthTerrainSourceTracker::removePagedInTile ( const osgEarth::TileKey  tileKey )

virtual

Removes a tileId and the corresponding tileData from myPagedInTiles.

virtual bool DtOsgEarthTerrainSourceTracker::dataAvailable ( DtPagingMetaDataPtr  metaData, DtTerrainPagingGeometryPtr  geometry  )

virtual

Finds all tiles within geometry, and tests to see whether they have all been paged in already.

Tiles within the geometry that have been paged in have their "lastUsed" data set to the intersectId parameter for removal priority.

Parameters

geometry	The geometry to test for data available.
intersectId	Optional parameter to mark already-paged-in tiles with.

Returns

True if all data within this geometry has been paged in.

Implements DtTerrainSourceTracker.

virtual void DtOsgEarthTerrainSourceTracker::pageInData ( DtPagingMetaDataPtr  metaData, DtTerrainPagingGeometryPtr  geometry  )

virtual

Page in data within geometry.

Determines which tiles are within the geometry and adds a page in command to myCommandQueue to page in any tiles within the geometry that have not yet been paged in.

Parameters

geometry	The geometry to page in data within.
intersectId	Id to assign to the page in command to seed tileData for newly paged-in tiles.
priority	Priority to use for commands generated by this call.

Implements DtTerrainSourceTracker.

virtual unsigned int DtOsgEarthTerrainSourceTracker::findOldestPagedData ( unsigned int &  numTrianglesOut )

virtual

Finds the least-recently-used tile and set myOldestPagedObject to it.

Parameters

numTrianglesOut

The number of triangles the least-recently-used tileId represents in the collision world.

Returns

The id of the last intersect test for which this tracker's least-recently-used data was necessary.

Implements DtTerrainSourceTracker.

virtual void DtOsgEarthTerrainSourceTracker::pageOutOldestData ( const int  priority )

virtual

Adds a page out command for the least-recently-used tileID to myCommandQueue.

Parameters

priority

Priority to use for commands generated by this call.

Implements DtTerrainSourceTracker.

virtual void DtOsgEarthTerrainSourceTracker::drawDebugInfo ( btIDebugDraw *  debugDrawer )

virtual

Draws the tile boundaries if we are drawing tile boundaries.

Implements DtTerrainSourceTracker.

virtual bool DtOsgEarthTerrainSourceTracker::canPageOutData ( unsigned int  intersectId )

virtual

Returns true if there is data that can be paged out.

Implements DtTerrainSourceTracker.

virtual DtPageInTilesCommand* DtOsgEarthTerrainSourceTracker::createPageInTilesCommand ( DtPagingMetaDataPtr  metaData )

protectedvirtual

virtual DtPageOutTilesCommand* DtOsgEarthTerrainSourceTracker::createPageOutTilesCommand ( DtPagingMetaDataPtr  metaData )

protectedvirtual

virtual void DtOsgEarthTerrainSourceTracker::tilesInGeometry ( DtTerrainPagingGeometryPtr  geometry, DtTileKeyList &  tilesOut  )

protectedvirtual

Calls a tilesIn function based on the geometry's type.

virtual void DtOsgEarthTerrainSourceTracker::pageOutData ( const DtTileKeyList  tilesToRemove, const int  priority  )

protectedvirtual

Creates a page out command with the given list of ids and adds it to the command queue.

Parameters

tilesToRemove	The list of tile ids to page out.
priority	Priority to use for commands generated by this call.

virtual void DtOsgEarthTerrainSourceTracker::tilesUnderChord ( const DtChord &  chord, DtTileKeyList &  tilesOut  )

protectedvirtual

virtual void DtOsgEarthTerrainSourceTracker::tilesInSphere ( const DtSphere &  sphere, DtTileKeyList &  tilesOut  )

protectedvirtual

virtual void DtOsgEarthTerrainSourceTracker::tilesInShape ( const DtLocalVertexList &  vertices, DtTileKeyList &  tilesOut  )

protectedvirtual

virtual bool DtOsgEarthTerrainSourceTracker::dataAvailable ( DtTileKeyList &  keyList, const unsigned int  intersectId = 0  )

protectedvirtual

virtual void DtOsgEarthTerrainSourceTracker::drawTile ( btIDebugDraw *  debugDrawer, const DtTileData &  tileData  )

protectedvirtual

osgEarth::TileKey::Direction DtOsgEarthTerrainSourceTracker::nextTileDirection ( osgEarth::TileKey::Direction  latDirection, osgEarth::TileKey::Direction  lonDirection, bool  isMostlyEastWest, double  slope, double  startX, double  startY, double  edgeX, double  edgeY  )

protected

Determine what direction the next tile under the chord is in, given the edge values in X and Y of the current tile.

lat and lon Direction are the directions in latitude and longitude from chord start to chord end. isMostlyEastWest is true if the chord delta X > delta Y; checking this condition allows the function to avoid dealing with small or zero sized deltas. slope is deltaX/deltaY or vice versa (see below). startX and Y are the chord start coordinates.

If isMostlyEastWest, then the slope is assumed to be (endY - startY)/(endX - startX), otherwise the reciprocal of that value. If lat direction is north, then edgeY is assumed to be yMax of the tile extent; otherwise yMin. If lon direction is east, then edgeX is assumed to be xMax of the extent; otherwise xMin.

Member Data Documentation

DtPagedTilesMap DtOsgEarthTerrainSourceTracker::myPagedInTiles

protected

Map of tileIds to the id of the last intersect that required that tile.

std::set<osgEarth::TileKey> DtOsgEarthTerrainSourceTracker::myTilesPendingRemoval

protected

osg::ref_ptr<const osgEarth::Profile> DtOsgEarthTerrainSourceTracker::myProfile

protected

unsigned int DtOsgEarthTerrainSourceTracker::myLOD

protected

osgEarth::TileKey* DtOsgEarthTerrainSourceTracker::myOldestPagedObject

protected

bool DtOsgEarthTerrainSourceTracker::myRecomputeOldestPagedObject

protected

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The documentation for this class was generated from the following file:

• /exports/nfedora7-1/nightly/docs/vrforcesDevelopment.tot/include/vantageTerrainImplementation/osgEarthTerrainSourceTracker.h