//clustering:
// troll the external model for geodes. for each geode, create a geode in the target
// model. then, for each geometry in that geode, replicate it once for each instance of
// the model in the feature batch and transform the actual verts to a local offset
// relative to the tile centroid. Finally, reassemble all the geodes and optimize.
// hopefully stateset sharing etc will work out. we may need to strip out LODs too.
bool
SubstituteModelFilter::cluster(const FeatureList& features,
const MarkerSymbol* symbol,
Session* session,
osg::Group* attachPoint,
FilterContext& cx )
{
MarkerToFeatures markerToFeatures;
MarkerFactory factory( session);
for (FeatureList::const_iterator i = features.begin(); i != features.end(); ++i)
{
Feature* f = i->get();
osg::ref_ptr< osg::Node > model = factory.getOrCreateNode( f, symbol );
//Try to find the existing entry
if (model.valid())
{
MarkerToFeatures::iterator itr = markerToFeatures.find( model.get() );
if (itr == markerToFeatures.end())
{
markerToFeatures[ model.get() ].push_back( f );
}
else
{
itr->second.push_back( f );
}
}
}
/*
OE_NOTICE << "Sorted models into " << markerToFeatures.size() << " buckets" << std::endl;
for (MarkerToFeatures::iterator i = markerToFeatures.begin(); i != markerToFeatures.end(); ++i)
{
OE_NOTICE << " Bucket has " << i->second.size() << " features" << std::endl;
}
*/
//For each model, cluster the features that use that model
for (MarkerToFeatures::iterator i = markerToFeatures.begin(); i != markerToFeatures.end(); ++i)
{
osg::Node* clone = dynamic_cast<osg::Node*>( i->first->clone( osg::CopyOp::DEEP_COPY_ALL ) );
// ..and apply the clustering to the copy.
ClusterVisitor cv( i->second, _modelMatrix, this, cx );
clone->accept( cv );
attachPoint->addChild( clone );
}
return true;
}
//clustering:
// troll the external model for geodes. for each geode, create a geode in the target
// model. then, for each geometry in that geode, replicate it once for each instance of
// the model in the feature batch and transform the actual verts to a local offset
// relative to the tile centroid. Finally, reassemble all the geodes and optimize.
// hopefully stateset sharing etc will work out. we may need to strip out LODs too.
bool
SubstituteModelFilter::cluster(const FeatureList& features,
const MarkerSymbol* symbol,
Session* session,
osg::Group* attachPoint,
FilterContext& context )
{
MarkerToFeatures markerToFeatures;
// first, sort the features into buckets, each bucket corresponding to a
// unique marker.
for (FeatureList::const_iterator i = features.begin(); i != features.end(); ++i)
{
Feature* f = i->get();
// resolve the URI for the marker:
StringExpression uriEx( *symbol->url() );
URI markerURI( f->eval( uriEx, &context ), uriEx.uriContext() );
// find and load the corresponding marker model. We're using the session-level
// object store to cache models. This is thread-safe sine we are always going
// to CLONE the model before using it.
osg::ref_ptr<osg::Node> model = context.getSession()->getObject<osg::Node>( markerURI.full() );
if ( !model.valid() )
{
osg::ref_ptr<MarkerResource> mres = new MarkerResource();
mres->uri() = markerURI;
model = mres->createNode( context.getSession()->getDBOptions() );
if ( model.valid() )
{
// store it, but only if there isn't already one in there.
context.getSession()->putObject( markerURI.full(), model.get(), false );
}
}
if ( model.valid() )
{
MarkerToFeatures::iterator itr = markerToFeatures.find( model.get() );
if (itr == markerToFeatures.end())
markerToFeatures[ model.get() ].push_back( f );
else
itr->second.push_back( f );
}
}
//For each model, cluster the features that use that marker
for (MarkerToFeatures::iterator i = markerToFeatures.begin(); i != markerToFeatures.end(); ++i)
{
osg::Node* prototype = i->first;
// we're using the Session cache since we know we'll be cloning.
if ( prototype )
{
osg::Node* clone = osg::clone( prototype, osg::CopyOp::DEEP_COPY_ALL );
// ..and apply the clustering to the copy.
ClusterVisitor cv( i->second, symbol, this, context );
clone->accept( cv );
attachPoint->addChild( clone );
}
}
return true;
}