ReadResult readNode(const std::string& uri, const osgDB::Options* dboptions) const
{
std::string ext = osgDB::getFileExtension(uri);
if ( acceptsExtension(ext) )
{
// parse the tile key and engine ID:
std::string requestdef = osgDB::getNameLessExtension(uri);
unsigned requestUID, engineUID;
sscanf(requestdef.c_str(), "%u.%u", &requestUID, &engineUID);
// find the appropriate engine:
osg::ref_ptr<RexTerrainEngineNode> engineNode;
RexTerrainEngineNode::getEngineByUID( (UID)engineUID, engineNode );
if ( engineNode.valid() )
{
PagerLoader* loader = dynamic_cast<PagerLoader*>(engineNode->getLoader());
if ( loader )
{
Loader::Request* req = loader->invokeAndRelease( requestUID );
return new RequestResultNode(req);
}
}
return ReadResult::FILE_NOT_FOUND;
}
else
{
return ReadResult::FILE_NOT_HANDLED;
}
};
void
RexTerrainEngineNode::postInitialize( const Map* map, const TerrainOptions& options )
{
TerrainEngineNode::postInitialize( map, options );
// Initialize the map frames. We need one for the update thread and one for the
// cull thread. Someday we can detect whether these are actually the same thread
// (depends on the viewer's threading mode).
_update_mapf = new MapFrame( map, Map::ENTIRE_MODEL );
// merge in the custom options:
_terrainOptions.merge( options );
// morphing imagery LODs requires we bind parent textures to their own unit.
if ( _terrainOptions.morphImagery() == true )
{
_requireParentTextures = true;
}
// if the envvar for tile expiration is set, overide the options setting
const char* val = ::getenv("OSGEARTH_EXPIRATION_THRESHOLD");
if ( val )
{
_terrainOptions.expirationThreshold() = as<unsigned>(val, _terrainOptions.expirationThreshold().get());
OE_INFO << LC << "Expiration threshold set by env var = " << _terrainOptions.expirationThreshold().get() << "\n";
}
// if the envvar for hires prioritization is set, override the options setting
const char* hiresFirst = ::getenv("OSGEARTH_HIGH_RES_FIRST");
if ( hiresFirst )
{
_terrainOptions.highResolutionFirst() = true;
}
// check for normal map generation (required for lighting).
if ( _terrainOptions.normalMaps() == true )
{
this->_requireNormalTextures = true;
}
// A shared registry for tile nodes in the scene graph. Enable revision tracking
// if requested in the options. Revision tracking lets the registry notify all
// live tiles of the current map revision so they can inrementally update
// themselves if necessary.
_liveTiles = new TileNodeRegistry("live");
_liveTiles->setMapRevision( _update_mapf->getRevision() );
if ( _terrainOptions.quickReleaseGLObjects() == true )
{
_deadTiles = new TileNodeRegistry("dead");
_quickReleaseInstalled = false;
ADJUST_UPDATE_TRAV_COUNT( this, +1 );
}
// A shared geometry pool.
if ( ::getenv("OSGEARTH_REX_NO_POOL") == 0L )
{
_geometryPool = new GeometryPool( _terrainOptions );
}
// Make a tile loader
PagerLoader* loader = new PagerLoader( this );
loader->setMergesPerFrame( _terrainOptions.mergesPerFrame().get() );
_loader = loader;
//_loader = new SimpleLoader();
this->addChild( _loader.get() );
// handle an already-established map profile:
MapInfo mapInfo( map );
if ( _update_mapf->getProfile() )
{
// NOTE: this will initialize the map with the startup layers
onMapInfoEstablished( mapInfo );
}
// install a layer callback for processing further map actions:
map->addMapCallback( new RexTerrainEngineNodeMapCallbackProxy(this) );
// Prime with existing layers:
_batchUpdateInProgress = true;
ElevationLayerVector elevationLayers;
map->getElevationLayers( elevationLayers );
for( ElevationLayerVector::const_iterator i = elevationLayers.begin(); i != elevationLayers.end(); ++i )
addElevationLayer( i->get() );
ImageLayerVector imageLayers;
map->getImageLayers( imageLayers );
for( ImageLayerVector::iterator i = imageLayers.begin(); i != imageLayers.end(); ++i )
addImageLayer( i->get() );
_batchUpdateInProgress = false;
// set up the initial shaders
updateState();
// register this instance to the osgDB plugin can find it.
registerEngine( this );
// now that we have a map, set up to recompute the bounds
dirtyBound();
}
void
RexTerrainEngineNode::postInitialize( const Map* map, const TerrainOptions& options )
{
// Force the mercator fast path off, since REX does not support it yet.
TerrainOptions myOptions = options;
myOptions.enableMercatorFastPath() = false;
TerrainEngineNode::postInitialize( map, myOptions );
// Initialize the map frames. We need one for the update thread and one for the
// cull thread. Someday we can detect whether these are actually the same thread
// (depends on the viewer's threading mode).
_update_mapf = new MapFrame( map, Map::ENTIRE_MODEL );
// A callback for overriding bounding boxes for tiles
_modifyBBoxCallback = new ModifyBoundingBoxCallback(*_update_mapf);
// merge in the custom options:
_terrainOptions.merge( myOptions );
// morphing imagery LODs requires we bind parent textures to their own unit.
if ( _terrainOptions.morphImagery() == true )
{
_requireParentTextures = true;
}
// Terrain morphing doesn't work in projected maps:
if (map->getSRS()->isProjected())
{
_terrainOptions.morphTerrain() = false;
}
// if the envvar for tile expiration is set, overide the options setting
const char* val = ::getenv("OSGEARTH_EXPIRATION_THRESHOLD");
if ( val )
{
_terrainOptions.expirationThreshold() = as<unsigned>(val, _terrainOptions.expirationThreshold().get());
OE_INFO << LC << "Expiration threshold set by env var = " << _terrainOptions.expirationThreshold().get() << "\n";
}
// if the envvar for hires prioritization is set, override the options setting
const char* hiresFirst = ::getenv("OSGEARTH_HIGH_RES_FIRST");
if ( hiresFirst )
{
_terrainOptions.highResolutionFirst() = true;
}
// check for normal map generation (required for lighting).
if ( _terrainOptions.normalMaps() == true )
{
this->_requireNormalTextures = true;
}
// A shared registry for tile nodes in the scene graph. Enable revision tracking
// if requested in the options. Revision tracking lets the registry notify all
// live tiles of the current map revision so they can inrementally update
// themselves if necessary.
_liveTiles = new TileNodeRegistry("live");
_liveTiles->setMapRevision( _update_mapf->getRevision() );
// A resource releaser that will call releaseGLObjects() on expired objects.
_releaser = new ResourceReleaser();
this->addChild(_releaser.get());
// A shared geometry pool.
_geometryPool = new GeometryPool( _terrainOptions );
_geometryPool->setReleaser( _releaser.get());
this->addChild( _geometryPool.get() );
// Make a tile loader
PagerLoader* loader = new PagerLoader( this );
loader->setNumLODs(_terrainOptions.maxLOD().getOrUse(DEFAULT_MAX_LOD));
loader->setMergesPerFrame( _terrainOptions.mergesPerFrame().get() );
for (std::vector<RexTerrainEngineOptions::LODOptions>::const_iterator i = _terrainOptions.lods().begin(); i != _terrainOptions.lods().end(); ++i) {
if (i->_lod.isSet()) {
loader->setLODPriorityScale(i->_lod.get(), i->_priorityScale.getOrUse(1.0f));
loader->setLODPriorityOffset(i->_lod.get(), i->_priorityOffset.getOrUse(0.0f));
}
}
_loader = loader;
this->addChild( _loader.get() );
// Make a tile unloader
_unloader = new UnloaderGroup( _liveTiles.get() );
_unloader->setThreshold( _terrainOptions.expirationThreshold().get() );
_unloader->setReleaser(_releaser.get());
this->addChild( _unloader.get() );
// handle an already-established map profile:
MapInfo mapInfo( map );
if ( _update_mapf->getProfile() )
{
// NOTE: this will initialize the map with the startup layers
onMapInfoEstablished( mapInfo );
}
// install a layer callback for processing further map actions:
map->addMapCallback( new RexTerrainEngineNodeMapCallbackProxy(this) );
// Prime with existing layers:
_batchUpdateInProgress = true;
ElevationLayerVector elevationLayers;
map->getLayers( elevationLayers );
for( ElevationLayerVector::const_iterator i = elevationLayers.begin(); i != elevationLayers.end(); ++i )
addElevationLayer( i->get() );
ImageLayerVector imageLayers;
map->getLayers( imageLayers );
for( ImageLayerVector::iterator i = imageLayers.begin(); i != imageLayers.end(); ++i )
addTileLayer( i->get() );
_batchUpdateInProgress = false;
// set up the initial shaders
updateState();
// register this instance to the osgDB plugin can find it.
registerEngine( this );
// now that we have a map, set up to recompute the bounds
dirtyBound();
}
