void
Tile::traverse( osg::NodeVisitor& nv )
{
// set the parent tile in the technique:
if ( !_parentTileSet && _terrain.valid() )
{
osg::ref_ptr<Tile> parentTile;
//Take a reference
osg::ref_ptr< TerrainNode > terrain = _terrain.get();
if (terrain.valid())
{
terrain->getTile( _key.createParentKey().getTileId(), parentTile );
CustomTerrainTechnique* tech = dynamic_cast<CustomTerrainTechnique*>( _tech.get() );
if ( tech )
tech->setParentTile( parentTile.get() );
_parentTileSet = true;
}
}
// this block runs the first time the tile is traversed while in the scene graph.
if ( !_hasBeenTraversed )
{
if ( nv.getVisitorType() == osg::NodeVisitor::UPDATE_VISITOR )
{
Threading::ScopedWriteLock lock( this->_tileLayersMutex );
{
if ( !_hasBeenTraversed && _terrain.valid() )
{
_hasBeenTraversed = true;
// we constructed this tile with an update traversal count of 1 so it would get
// here and we could register the tile. Now we can decrement it back to normal.
// this MUST be called from the UPDATE traversal.
ADJUST_UPDATE_TRAV_COUNT( this, -1 );
}
}
}
}
// code copied from osgTerrain::TerrainTile... TODO: evaluate this... -gw
if ( nv.getVisitorType()==osg::NodeVisitor::CULL_VISITOR )
{
osg::ClusterCullingCallback* ccc = dynamic_cast<osg::ClusterCullingCallback*>(getCullCallback());
if (ccc)
{
if (ccc->cull(&nv,0,static_cast<osg::State *>(0))) return;
}
}
if ( _dirty )
{
init();
}
if ( _tech.valid() )
{
_tech->traverse( nv );
}
}
void
Tile::applyImmediateTileUpdate( TileUpdate::Action action, int value )
{
CustomTerrainTechnique* tech = dynamic_cast<CustomTerrainTechnique*>( _tech.get() );
if ( tech )
{
tech->compile( TileUpdate(action, value), 0L );
tech->applyTileUpdates();
}
else
{
queueTileUpdate( action, value );
}
}
void
OSGTerrainEngineNode::onMapInfoEstablished( const MapInfo& mapInfo )
{
LoadingPolicy::Mode mode = *_terrainOptions.loadingPolicy()->mode();
OE_INFO << LC << "Loading policy mode = " <<
( mode == LoadingPolicy::MODE_PREEMPTIVE ? "PREEMPTIVE" :
mode == LoadingPolicy::MODE_SEQUENTIAL ? "SEQUENTIAL" :
mode == LoadingPolicy::MODE_PARALLEL ? "PARALLEL" :
"SERIAL/STANDARD" )
<< std::endl;
// create a factory for creating actual tile data
_tileFactory = new OSGTileFactory( _uid, *_cull_mapf, _terrainOptions );
// go through and build the root nodesets.
if ( !_isStreaming )
{
_terrain = new Terrain(
*_update_mapf, *_cull_mapf, _tileFactory.get(), *_terrainOptions.quickReleaseGLObjects() );
}
else
{
_terrain = new StreamingTerrain(
*_update_mapf, *_cull_mapf, _tileFactory.get(), *_terrainOptions.quickReleaseGLObjects() );
}
this->addChild( _terrain );
// set the initial properties from the options structure:
_terrain->setVerticalScale( _terrainOptions.verticalScale().value() );
_terrain->setSampleRatio ( _terrainOptions.heightFieldSampleRatio().value() );
if (_terrainOptions.enableBlending().value())
{
_terrain->getOrCreateStateSet()->setMode(GL_BLEND , osg::StateAttribute::ON);
}
OE_INFO << LC << "Sample ratio = " << _terrainOptions.heightFieldSampleRatio().value() << std::endl;
// install the proper layer composition technique:
if ( _texCompositor->getTechnique() == TerrainOptions::COMPOSITING_MULTIPASS )
{
_terrain->setTechniquePrototype( new MultiPassTerrainTechnique( _texCompositor.get() ) );
OE_INFO << LC << "Compositing technique = MULTIPASS" << std::endl;
}
else
{
CustomTerrainTechnique* tech = new SinglePassTerrainTechnique( _texCompositor.get() );
// prepare the interpolation technique for generating triangles:
if ( mapInfo.getElevationInterpolation() == INTERP_TRIANGULATE )
tech->setOptimizeTriangleOrientation( false );
_terrain->setTechniquePrototype( tech );
}
// install the shader program, if applicable:
installShaders();
// calculate a good thread pool size for non-streaming parallel processing
if ( !_isStreaming )
{
unsigned num = 2 * OpenThreads::GetNumberOfProcessors();
if ( _terrainOptions.loadingPolicy().isSet() )
{
if ( _terrainOptions.loadingPolicy()->numLoadingThreads().isSet() )
{
num = *_terrainOptions.loadingPolicy()->numLoadingThreads();
}
else if ( _terrainOptions.loadingPolicy()->numLoadingThreadsPerCore().isSet() )
{
num = (unsigned)(*_terrainOptions.loadingPolicy()->numLoadingThreadsPerCore() * OpenThreads::GetNumberOfProcessors());
}
}
_tileService = new TaskService( "TileBuilder", num );
// initialize the tile builder
_tileBuilder = new TileBuilder( getMap(), _terrainOptions, _tileService.get() );
// initialize a key node factory.
switch( mode )
{
case LoadingPolicy::MODE_SERIAL:
_keyNodeFactory = new SerialKeyNodeFactory( _tileBuilder.get(), _terrainOptions, mapInfo, _terrain, _uid );
break;
case LoadingPolicy::MODE_PARALLEL:
_keyNodeFactory = new ParallelKeyNodeFactory( _tileBuilder.get(), _terrainOptions, mapInfo, _terrain, _uid );
break;
default:
break;
}
}
// Build the first level of the terrain.
// Collect the tile keys comprising the root tiles of the terrain.
std::vector< TileKey > keys;
_update_mapf->getProfile()->getRootKeys( keys );
for( unsigned i=0; i<keys.size(); ++i )
{
osg::Node* node;
if ( _keyNodeFactory.valid() )
node = _keyNodeFactory->createNode( keys[i] );
else
node = _tileFactory->createSubTiles( *_update_mapf, _terrain, keys[i], true );
if ( node )
_terrain->addChild( node );
else
OE_WARN << LC << "Couldn't make tile for root key: " << keys[i].str() << std::endl;
}
// we just added the root tiles, so mark the bound in need of recomputation.
dirtyBound();
}
// called from the UPDATE TRAVERSAL, because this method can potentially alter
// the scene graph.
bool
StreamingTile::serviceCompletedRequests( const MapFrame& mapf, bool tileTableLocked )
{
//Don't do anything until we have been added to the scene graph
if (!_hasBeenTraversed) return false;
bool tileModified = false;
if ( !_requestsInstalled )
return false;
// First service the tile generator:
if ( _tileGenRequest.valid() && _tileGenRequest->isCompleted() )
{
CustomTerrainTechnique* tech = dynamic_cast<CustomTerrainTechnique*>( getTerrainTechnique() );
if ( tech )
{
//TODO: consider waiting to apply if there are still more tile updates in the queue.
if ( _tileUpdates.size() == 0 )
{
tileModified = tech->applyTileUpdates();
}
}
_tileGenRequest = 0L;
}
// now deal with imagery.
const LoadingPolicy& lp = getStreamingTerrain()->getLoadingPolicy();
StreamingTerrainNode* terrain = getStreamingTerrain();
//Check each layer independently.
for( ImageLayerVector::const_iterator i = mapf.imageLayers().begin(); i != mapf.imageLayers().end(); ++i )
{
ImageLayer* imageLayer = i->get();
bool checkForFinalImagery = false;
CustomColorLayer colorLayer;
if ( getCustomColorLayer( imageLayer->getUID(), colorLayer ) )
{
if ( lp.mode() == LoadingPolicy::MODE_PREEMPTIVE )
{
// in preemptive mode, always check for the final imagery - there are no intermediate
// placeholders.
checkForFinalImagery = true;
}
else if (lp.mode() == LoadingPolicy::MODE_SEQUENTIAL &&
readyForNewImagery(imageLayer, colorLayer.getLevelOfDetail()) )
{
// in sequential mode, we have to incrementally increase imagery resolution by
// creating placeholders based of parent tiles, one LOD at a time.
if ( colorLayer.getLevelOfDetail() + 1 < (int)_key.getLevelOfDetail() )
{
// if the parent's image LOD is higher than ours, replace ours with the parent's
// since it is a higher-resolution placeholder:
if ( _family[Relative::PARENT].getImageLOD(colorLayer.getUID()) > colorLayer.getLevelOfDetail() )
{
osg::ref_ptr<Tile> parentTile;
getStreamingTerrain()->getTile( _family[Relative::PARENT].tileID, parentTile, !tileTableLocked );
// Set the color layer to the parent color layer as a placeholder.
CustomColorLayer parentColorLayer;
if ( parentTile->getCustomColorLayer( colorLayer.getUID(), parentColorLayer ) )
{
this->setCustomColorLayer( parentColorLayer );
}
// ... and queue up an update request.
queueTileUpdate( TileUpdate::UPDATE_IMAGE_LAYER, colorLayer.getUID() );
}
}
else
{
// we've gone as far as we can with placeholders; time to check for the
// final imagery tile.
checkForFinalImagery = true;
}
}
}
if ( checkForFinalImagery )
{
// Then the image requests:
for( TaskRequestList::iterator itr = _requests.begin(); itr != _requests.end(); )
{
bool increment = true;
TileColorLayerRequest* r = static_cast<TileColorLayerRequest*>( itr->get() );
//We only care about the current layer we are checking
if ( r->_layerUID == imageLayer->getUID() )
{
if ( itr->get()->isCompleted() )
{
if ( r->wasCanceled() )
{
//Reset the cancelled task to IDLE and give it a new progress callback.
r->setState( TaskRequest::STATE_IDLE );
r->setProgressCallback( new StampedProgressCallback(
r, terrain->getImageryTaskService( r->_layerUID )));
r->reset();
}
else // success..
{
//See if we even care about the request
if ( !mapf.getImageLayerByUID( r->_layerUID ) )
{
//The maplayer was probably deleted
OE_DEBUG << "Layer uid=" << r->_layerUID << " no longer exists, ignoring TileColorLayerRequest " << std::endl;
itr = _requests.erase(itr);
increment = false;
}
else
{
CustomColorLayerRef* result = static_cast<CustomColorLayerRef*>( r->getResult() );
if ( result )
{
this->setCustomColorLayer( result->_layer );
queueTileUpdate( TileUpdate::UPDATE_IMAGE_LAYER, r->_layerUID );
//OE_NOTICE << "Complete IR (" << _key.str() << ") layer=" << r->_layerId << std::endl;
// remove from the list (don't reference "r" after this!)
itr = _requests.erase( itr );
increment = false;
}
else
{
if (r->_numTries > r->_maxTries)
{
CustomColorLayer oldLayer;
if ( this->getCustomColorLayer( r->_layerUID, oldLayer ) )
{
// apply the old color layer but with a new LOD.
this->setCustomColorLayer( CustomColorLayer(
oldLayer.getMapLayer(),
oldLayer.getImage(),
oldLayer.getLocator(),
_key.getLevelOfDetail(),
_key ));
itr = _requests.erase( itr );
increment = false;
OE_DEBUG << "Tried (" << _key.str() << ") (layer uid=" << r->_layerUID << "), too many times, moving on...." << std::endl;
}
}
else
{
OE_DEBUG << "IReq error (" << _key.str() << ") (layer uid=" << r->_layerUID << "), retrying" << std::endl;
//The color layer request failed, probably due to a server error. Reset it.
r->setState( TaskRequest::STATE_IDLE );
r->reset();
}
}
}
}
}
}
if ( increment )
++itr;
}
}
}
// Finally, the elevation requests:
if ( _hasElevation && !_elevationLayerUpToDate && _elevRequest.valid() && _elevPlaceholderRequest.valid() )
{
// First, check is the Main elevation request is done. If so, we will now have the final HF data
// and can shut down the elevation requests for this tile.
if ( _elevRequest->isCompleted() )
{
if ( _elevRequest->wasCanceled() )
{
// If the request was canceled, reset it to IDLE and reset the callback. On the next
_elevRequest->setState( TaskRequest::STATE_IDLE );
_elevRequest->setProgressCallback( new ProgressCallback() );
_elevRequest->reset();
}
else // success:
{
// if the elevation request succeeded, install the new elevation layer!
TileElevationLayerRequest* r = static_cast<TileElevationLayerRequest*>( _elevRequest.get() );
osg::ref_ptr<osgTerrain::HeightFieldLayer> newHFLayer = static_cast<osgTerrain::HeightFieldLayer*>( r->getResult() );
if ( newHFLayer.valid() && newHFLayer->getHeightField() != NULL )
{
newHFLayer->getHeightField()->setSkirtHeight(
terrain->getTileFactory()->getTerrainOptions().heightFieldSkirtRatio().get() *
this->getBound().radius() );
// need to write-lock the layer data since we'll be changing it:
{
Threading::ScopedWriteLock lock( _tileLayersMutex );
this->setElevationLayer( newHFLayer.get() );
this->dirtyBound();
}
// the tile needs rebuilding. This will kick off a TileGenRequest.
queueTileUpdate( TileUpdate::UPDATE_ELEVATION );
// finalize the LOD marker for this tile, so other tiles can see where we are.
_elevationLOD = _key.getLevelOfDetail();
#ifdef PREEMPTIVE_DEBUG
OE_NOTICE << "Tile (" << _key.str() << ") final HF, LOD (" << _elevationLOD << ")" << std::endl;
#endif
// this was the final elev request, so mark elevation as DONE.
_elevationLayerUpToDate = true;
// GW- just reset these and leave them alone and let cancelRequests() take care of cleanup later.
// done with our Elevation requests!
//_elevRequest = 0L;
//_elevPlaceholderRequest = 0L;
}
else
{
//We've tried to get the tile's elevation but couldn't. Just mark the elevation layer as up to date and move on.
_elevationLOD = _key.getLevelOfDetail();
_elevationLayerUpToDate = true;
//This code will retry indefinitely. We need to have a way to limit the number of retries since
//it will block neighbor tiles from loading.
//_elevRequest->setState( TaskRequest::STATE_IDLE );
//_elevRequest->reset();
}
}
}
else if ( _elevPlaceholderRequest->isCompleted() )
{
TileElevationPlaceholderLayerRequest* r =
static_cast<TileElevationPlaceholderLayerRequest*>(_elevPlaceholderRequest.get());
if ( r->wasCanceled() )
{
r->setState( TaskRequest::STATE_IDLE );
r->setProgressCallback( new ProgressCallback() );
r->reset();
}
else // success:
{
osg::ref_ptr<osgTerrain::HeightFieldLayer> newPhLayer = static_cast<osgTerrain::HeightFieldLayer*>( r->getResult() );
if ( newPhLayer.valid() && newPhLayer->getHeightField() != NULL )
{
// install the new elevation layer.
{
Threading::ScopedWriteLock lock( _tileLayersMutex );
this->setElevationLayer( newPhLayer.get() );
this->dirtyBound();
}
// tile needs to be recompiled.
queueTileUpdate( TileUpdate::UPDATE_ELEVATION );
// update the elevation LOD for this tile, now that the new HF data is installed. This will
// allow other tiles to see where this tile's HF data is.
_elevationLOD = r->_nextLOD;
#ifdef PREEMPTIVE_DEBUG
OE_NOTICE << "..tile (" << _key.str() << ") is now at (" << _elevationLOD << ")" << std::endl;
#endif
}
_elevPlaceholderRequest->setState( TaskRequest::STATE_IDLE );
_elevPlaceholderRequest->reset();
}
}
}
// if we have a new TileGenRequest, queue it up now.
if ( _tileUpdates.size() > 0 && !_tileGenRequest.valid() ) // _tileGenNeeded && !_tileGenRequest.valid())
{
_tileGenRequest = new TileGenRequest( this, _tileUpdates.front() );
_tileUpdates.pop();
//OE_NOTICE << "tile (" << _key.str() << ") queuing new tile gen" << std::endl;
getStreamingTerrain()->getTileGenerationTaskService()->add( _tileGenRequest.get() );
}
return tileModified;
}
