osg::Node*
SingleKeyNodeFactory::createTile(TileModel* model, bool setupChildrenIfNecessary)
{
// compile the model into a node:
TileNode* tileNode = _modelCompiler->compile( model, _frame );
// see if this tile might have children.
bool prepareForChildren =
setupChildrenIfNecessary &&
model->_tileKey.getLOD() < *_options.maxLOD();
osg::Node* result = 0L;
if ( prepareForChildren )
{
//Compute the min range based on the 2D size of the tile
osg::BoundingSphere bs = tileNode->getBound();
GeoExtent extent = model->_tileKey.getExtent();
GeoPoint lowerLeft(extent.getSRS(), extent.xMin(), extent.yMin(), 0.0, ALTMODE_ABSOLUTE);
GeoPoint upperRight(extent.getSRS(), extent.xMax(), extent.yMax(), 0.0, ALTMODE_ABSOLUTE);
osg::Vec3d ll, ur;
lowerLeft.toWorld( ll );
upperRight.toWorld( ur );
double radius = (ur - ll).length() / 2.0;
float minRange = (float)(radius * _options.minTileRangeFactor().value());
TilePagedLOD* plod = new TilePagedLOD( _engineUID, _liveTiles, _deadTiles );
plod->setCenter ( bs.center() );
plod->addChild ( tileNode );
plod->setRange ( 0, minRange, FLT_MAX );
plod->setFileName( 1, Stringify() << tileNode->getKey().str() << "." << _engineUID << ".osgearth_engine_mp_tile" );
plod->setRange ( 1, 0, minRange );
#if USE_FILELOCATIONCALLBACK
osgDB::Options* options = Registry::instance()->cloneOrCreateOptions();
options->setFileLocationCallback( new FileLocationCallback() );
plod->setDatabaseOptions( options );
#endif
result = plod;
// this one rejects back-facing tiles:
if ( _frame.getMapInfo().isGeocentric() && _options.clusterCulling() == true )
{
osg::HeightField* hf =
model->_elevationData.getHeightField();
result->addCullCallback( HeightFieldUtils::createClusterCullingCallback(
hf,
tileNode->getKey().getProfile()->getSRS()->getEllipsoid(),
*_options.verticalScale() ) );
}
}
else
{
result = tileNode;
}
return result;
}
// The osgDB::DatabasePager will call this method when merging a new child
// into the scene graph.
bool
TilePagedLOD::addChild(osg::Node* node)
{
if ( node )
{
// if we see an invalid tile marker, disable the paged lod slot.
if ( dynamic_cast<InvalidTileNode*>(node) )
{
this->setFileName( 1, "" );
this->setRange( 1, 0, 0 );
this->setRange( 0, 0.0f, FLT_MAX );
return true;
}
// If it's a TileNode, this is the simple first addition of the
// static TileNode child (not from the pager).
TileNode* tilenode = dynamic_cast<TileNode*>( node );
if ( tilenode && _live.get() )
{
_live->add( tilenode );
// Listen for out east and south neighbors.
const TileKey& key = tilenode->getKey();
_live->listenFor( key.createNeighborKey(1, 0), tilenode );
_live->listenFor( key.createNeighborKey(0, 1), tilenode );
}
return osg::PagedLOD::addChild( node );
}
return false;
}
osg::Node*
SerialKeyNodeFactory::createTile(TileModel* model,
bool tileHasRealData)
{
// compile the model into a node:
TileNode* tileNode = _modelCompiler->compile( model );
// see if this tile might have children.
bool prepareForChildren =
(tileHasRealData || (_options.minLOD().isSet() && model->_tileKey.getLOD() < *_options.minLOD())) &&
model->_tileKey.getLOD() < *_options.maxLOD();
osg::Node* result = 0L;
if ( prepareForChildren )
{
//Compute the min range based on the 2D size of the tile
osg::BoundingSphere bs = tileNode->getBound();
GeoExtent extent = model->_tileKey.getExtent();
GeoPoint lowerLeft(extent.getSRS(), extent.xMin(), extent.yMin(), 0.0, ALTMODE_ABSOLUTE);
GeoPoint upperRight(extent.getSRS(), extent.xMax(), extent.yMax(), 0.0, ALTMODE_ABSOLUTE);
osg::Vec3d ll, ur;
lowerLeft.toWorld( ll );
upperRight.toWorld( ur );
double radius = (ur - ll).length() / 2.0;
float minRange = (float)(radius * _options.minTileRangeFactor().value());
osgDB::Options* dbOptions = Registry::instance()->cloneOrCreateOptions();
TileGroup* plod = new TileGroup(tileNode, _engineUID, _liveTiles.get(), _deadTiles.get(), dbOptions);
plod->setSubtileRange( minRange );
#if USE_FILELOCATIONCALLBACK
dbOptions->setFileLocationCallback( new FileLocationCallback() );
#endif
result = plod;
}
else
{
result = tileNode;
}
// this one rejects back-facing tiles:
if ( _mapInfo.isGeocentric() && _options.clusterCulling() == true )
{
osg::HeightField* hf =
model->_elevationData.getHeightField();
result->addCullCallback( HeightFieldUtils::createClusterCullingCallback(
hf,
tileNode->getKey().getProfile()->getSRS()->getEllipsoid(),
*_options.verticalScale() ) );
}
return result;
}
// The osgDB::DatabasePager will call this automatically to purge expired
// tiles from the scene graph.
bool
TilePagedLOD::removeExpiredChildren(double expiryTime,
unsigned expiryFrame,
osg::NodeList& removedChildren)
{
if (_children.size()>_numChildrenThatCannotBeExpired)
{
unsigned cindex = _children.size() - 1;
double minExpiryTime = 0.0;
unsigned minExpiryFrames = 0;
// these were added in osg 3.1.0+
#if OSG_VERSION_GREATER_OR_EQUAL(3,1,0)
minExpiryTime = _perRangeDataList[cindex]._minExpiryTime;
minExpiryFrames = _perRangeDataList[cindex]._minExpiryFrames;
#endif
if (!_perRangeDataList[cindex]._filename.empty() &&
_perRangeDataList[cindex]._timeStamp + minExpiryTime < expiryTime &&
_perRangeDataList[cindex]._frameNumber + minExpiryFrames < expiryFrame)
{
osg::Node* nodeToRemove = _children[cindex].get();
removedChildren.push_back(nodeToRemove);
ExpirationCollector collector( _live.get() );
nodeToRemove->accept( collector );
_releaser->push( collector._toRelease );
if ( _debug )
{
TileNode* tileNode = getTileNode();
std::string key = tileNode ? tileNode->getKey().str() : "unk";
OE_NOTICE
<< LC << "Tile " << key << " : expiring " << collector._count << " children; "
<< "TS = " << _perRangeDataList[cindex]._timeStamp
<< ", MET = " << minExpiryTime
<< ", ET = " << expiryTime
<< "; FN = " << _perRangeDataList[cindex]._frameNumber
<< ", MEF = " << minExpiryFrames
<< ", EF = " << expiryFrame
<< "\n";
}
return Group::removeChildren(cindex,1);
}
}
return false;
}
osg::Node*
SingleKeyNodeFactory::createTile(TileModel* model,
bool setupChildrenIfNecessary,
ProgressCallback* progress)
{
#ifdef EXPERIMENTAL_TILE_NODE_CACHE
osg::ref_ptr<TileNode> tileNode;
TileNodeCache::Record rec;
cache.get(model->_tileKey, rec);
if ( rec.valid() )
{
tileNode = rec.value().get();
}
else
{
tileNode = _modelCompiler->compile( model, _frame );
cache.insert(model->_tileKey, tileNode);
}
#else
// compile the model into a node:
TileNode* tileNode = _modelCompiler->compile(model, _frame, progress);
#endif
// see if this tile might have children.
bool prepareForChildren =
setupChildrenIfNecessary &&
model->_tileKey.getLOD() < *_options.maxLOD();
osg::Node* result = 0L;
if ( prepareForChildren )
{
osg::BoundingSphere bs = tileNode->getBound();
TilePagedLOD* plod = new TilePagedLOD( _engineUID, _liveTiles, _deadTiles );
plod->setCenter ( bs.center() );
plod->addChild ( tileNode );
plod->setFileName( 1, Stringify() << tileNode->getKey().str() << "." << _engineUID << ".osgearth_engine_mp_tile" );
if ( _options.rangeMode().value() == osg::LOD::DISTANCE_FROM_EYE_POINT )
{
//Compute the min range based on the 2D size of the tile
GeoExtent extent = model->_tileKey.getExtent();
GeoPoint lowerLeft(extent.getSRS(), extent.xMin(), extent.yMin(), 0.0, ALTMODE_ABSOLUTE);
GeoPoint upperRight(extent.getSRS(), extent.xMax(), extent.yMax(), 0.0, ALTMODE_ABSOLUTE);
osg::Vec3d ll, ur;
lowerLeft.toWorld( ll );
upperRight.toWorld( ur );
double radius = (ur - ll).length() / 2.0;
float minRange = (float)(radius * _options.minTileRangeFactor().value());
plod->setRange( 0, minRange, FLT_MAX );
plod->setRange( 1, 0, minRange );
plod->setRangeMode( osg::LOD::DISTANCE_FROM_EYE_POINT );
}
else
{
plod->setRange( 0, 0.0f, _options.tilePixelSize().value() );
plod->setRange( 1, _options.tilePixelSize().value(), FLT_MAX );
plod->setRangeMode( osg::LOD::PIXEL_SIZE_ON_SCREEN );
}
// DBPager will set a priority based on the ratio range/maxRange.
// This will offset that number with a full LOD #, giving LOD precedence.
// Experimental.
//plod->setPriorityScale( 1, model->_tileKey.getLOD()+1 );
#if USE_FILELOCATIONCALLBACK
osgDB::Options* options = plod->getOrCreateDBOptions();
options->setFileLocationCallback( new FileLocationCallback() );
#endif
result = plod;
// this one rejects back-facing tiles:
if ( _frame.getMapInfo().isGeocentric() && _options.clusterCulling() == true )
{
osg::HeightField* hf =
model->_elevationData.getHeightField();
result->addCullCallback( HeightFieldUtils::createClusterCullingCallback(
hf,
tileNode->getKey().getProfile()->getSRS()->getEllipsoid(),
*_options.verticalScale() ) );
}
}
else
{
result = tileNode;
}
return result;
}
osg::Node*
SingleKeyNodeFactory::createTile(TileModel* model,
bool setupChildrenIfNecessary,
ProgressCallback* progress)
{
#ifdef EXPERIMENTAL_TILE_NODE_CACHE
osg::ref_ptr<TileNode> tileNode;
TileNodeCache::Record rec;
cache.get(model->_tileKey, rec);
if ( rec.valid() )
{
tileNode = rec.value().get();
}
else
{
tileNode = _modelCompiler->compile( model, _frame );
cache.insert(model->_tileKey, tileNode);
}
#else
// compile the model into a node:
TileNode* tileNode = _modelCompiler->compile(model, _frame, progress);
tileNode->setEngineUID( _engineUID );
#endif
// see if this tile might have children.
bool prepareForChildren =
setupChildrenIfNecessary &&
model->_tileKey.getLOD() < *_options.maxLOD();
osg::Node* result = 0L;
if ( prepareForChildren )
{
osg::BoundingSphere bs = tileNode->getBound();
TilePagedLOD* plod = new TilePagedLOD( _engineUID, _liveTiles, _deadTiles );
plod->setCenter ( bs.center() );
plod->addChild ( tileNode );
plod->setFileName( 1, Stringify() << tileNode->getKey().str() << "." << _engineUID << ".osgearth_engine_mp_tile" );
plod->setDebug ( _debug );
if ( _options.rangeMode().value() == osg::LOD::DISTANCE_FROM_EYE_POINT )
{
//Compute the min range based on the 2D size of the tile
GeoExtent extent = model->_tileKey.getExtent();
double radius = 0.0;
#if 0
// Test code to use the equitorial radius so that all of the tiles at the same level
// have the same range. This will make the poles page in more appropriately.
if (_frame.getMapInfo().isGeocentric())
{
GeoExtent equatorialExtent(
extent.getSRS(),
extent.west(),
-extent.height()/2.0,
extent.east(),
extent.height()/2.0 );
radius = equatorialExtent.getBoundingGeoCircle().getRadius();
}
else
#endif
{
GeoPoint lowerLeft(extent.getSRS(), extent.xMin(), extent.yMin(), 0.0, ALTMODE_ABSOLUTE);
GeoPoint upperRight(extent.getSRS(), extent.xMax(), extent.yMax(), 0.0, ALTMODE_ABSOLUTE);
osg::Vec3d ll, ur;
lowerLeft.toWorld( ll );
upperRight.toWorld( ur );
radius = (ur - ll).length() / 2.0;
}
float minRange = (float)(radius * _options.minTileRangeFactor().value());
plod->setRange( 0, minRange, FLT_MAX );
plod->setRange( 1, 0, minRange );
plod->setRangeMode( osg::LOD::DISTANCE_FROM_EYE_POINT );
}
else
{
// the *2 is because we page in 4-tile sets, not individual tiles.
float size = 2.0f * _options.tilePixelSize().value();
plod->setRange( 0, 0.0f, size );
plod->setRange( 1, size, FLT_MAX );
plod->setRangeMode( osg::LOD::PIXEL_SIZE_ON_SCREEN );
}
// Install a tile-aligned bounding box in the pager node itself so we can do
// visibility testing before paging in subtiles.
plod->setChildBoundingBoxAndMatrix(
1,
tileNode->getTerrainBoundingBox(),
tileNode->getMatrix() );
// DBPager will set a priority based on the ratio range/maxRange.
// This will offset that number with a full LOD #, giving LOD precedence.
// Experimental.
//plod->setPriorityScale( 1, model->_tileKey.getLOD()+1 );
#if USE_FILELOCATIONCALLBACK
osgDB::Options* options = plod->getOrCreateDBOptions();
options->setFileLocationCallback( new FileLocationCallback() );
#endif
result = plod;
// this one rejects back-facing tiles:
if ( _frame.getMapInfo().isGeocentric() && _options.clusterCulling() == true )
{
#if 1
osg::HeightField* hf =
model->_elevationData.getHeightField();
result->addCullCallback( HeightFieldUtils::createClusterCullingCallback(
hf,
tileNode->getKey().getProfile()->getSRS()->getEllipsoid(),
*_options.verticalScale() ) );
#else
// This works, but isn't quite as tight at the cluster culler.
// Re-evaluate down the road.
result->addCullCallback( new HorizonTileCuller(
_frame.getMapInfo().getSRS(),
tileNode->getTerrainBoundingBox(),
tileNode->getMatrix(), tileNode->getKey() ) );
#endif
}
}
else
{
result = tileNode;
}
return result;
}
TileNode*
TileGroupFactory::createTileNodeGraph(TerrainTileModel* model,
bool setupChildrenIfNecessary,
ProgressCallback* progress)
{
// TODO: fix this
const unsigned tileSize = 17;
// Build the surface node.
SurfaceNodeFactory factory(model, _frame, _renderBindings, _geometryPool, tileSize, _options);
SurfaceNode* surfaceNode = factory.createSurfaceNode();
surfaceNode->setEngineUID( _terrainEngine->getUID() );
// see if this tile might have children.
bool prepareForChildren =
setupChildrenIfNecessary &&
model->getKey().getLOD() < *_options.maxLOD();
// Build the Tile Node that will hold all the textures and texture matrices.
TileNode* tileNode = createTileNode(
model,
progress );
// Build the paging node that will load subtiles, if necessary:
if ( prepareForChildren )
{
osg::BoundingSphere bs = surfaceNode->getBound();
TilePagedLOD* plod = new TilePagedLOD( _terrainEngine->getUID(), _liveTiles, _deadTiles );
plod->setCenter ( bs.center() );
plod->addChild ( surfaceNode );
plod->setFileName( 1, Stringify()
<< model->getKey().str()
<< "." << _terrainEngine->getUID()
<< ".osgearth_engine_mp_tile" );
if ( _options.rangeMode().value() == osg::LOD::DISTANCE_FROM_EYE_POINT )
{
//Compute the min range based on the 2D size of the tile
GeoExtent extent = model->getKey().getExtent();
GeoPoint lowerLeft(extent.getSRS(), extent.xMin(), extent.yMin(), 0.0, ALTMODE_ABSOLUTE);
GeoPoint upperRight(extent.getSRS(), extent.xMax(), extent.yMax(), 0.0, ALTMODE_ABSOLUTE);
osg::Vec3d ll, ur;
lowerLeft.toWorld( ll );
upperRight.toWorld( ur );
double radius = (ur - ll).length() / 2.0;
float minRange = (float)(radius * _options.minTileRangeFactor().value());
plod->setRange( 0, minRange, FLT_MAX );
plod->setRange( 1, 0, minRange );
plod->setRangeMode( osg::LOD::DISTANCE_FROM_EYE_POINT );
}
else
{
plod->setRange( 0, 0.0f, _options.tilePixelSize().value() );
plod->setRange( 1, _options.tilePixelSize().value(), FLT_MAX );
plod->setRangeMode( osg::LOD::PIXEL_SIZE_ON_SCREEN );
}
#if 0 // TODO: reinstate this!
// Install a tile-aligned bounding box in the pager node itself so we can do
// visibility testing before paging in subtiles.
plod->setChildBoundingBoxAndMatrix(
1,
surfaceNode->getTerrainBoundingBox(),
surfaceNode->getLocalToWorldMatrix() );
#endif
#if USE_FILELOCATIONCALLBACK
osgDB::Options* options = plod->getOrCreateDBOptions();
options->setFileLocationCallback( new FileLocationCallback() );
#endif
tileNode->addChild( plod );
// Install a callback to reject back-facing tiles.
if ( _frame.getMapInfo().isGeocentric() && _options.clusterCulling() == true )
{
const osg::HeightField* heightField = model->elevationModel()->getHeightField();
if ( heightField )
{
tileNode->addCullCallback( HeightFieldUtils::createClusterCullingCallback(
heightField,
tileNode->getKey().getProfile()->getSRS()->getEllipsoid(),
*_options.verticalScale() ) );
}
}
}
else
{
tileNode->addChild( surfaceNode );
}
return tileNode;
}
