void onHit(ObjectID id)
{
// First see whether it's a feature:
FeatureIndex* index = Registry::objectIndex()->get<FeatureIndex>( id );
Feature* feature = index ? index->getFeature( id ) : 0L;
if ( feature )
{
s_fidLabel->setText( Stringify() << "Feature ID = " << feature->getFID() << " (oid = " << id << ")" );
s_nameLabel->setText( Stringify() << "Name = " << feature->getString("name") );
}
else
{
// Check whether it's an annotation:
AnnotationNode* anno = Registry::objectIndex()->get<AnnotationNode>( id );
if ( anno )
{
s_fidLabel->setText( Stringify() << "ObjectID = " << id );
s_nameLabel->setName( Stringify() << "Name = " << anno->getName() );
}
// None of the above.. clear.
else
{
s_fidLabel->setText( Stringify() << "oid = " << id );
s_nameLabel->setText( "Name = " );
}
}
s_highlightUniform->set( id );
}
osg::Group*
createLabels( Map* map )
{
osg::ref_ptr<osg::Group> labels = new osg::Group();
// first, open up the source shapefile
OGRFeatureOptions fo;
fo.url() = g_featureFile;
osg::ref_ptr<FeatureSource> features = FeatureSourceFactory::create( fo );
if ( !features.valid() )
{
OE_WARN << LC << "Unable to load features!" << std::endl;
return 0L;
}
features->initialize( "" );
const FeatureProfile* featureProfile = features->getFeatureProfile();
if ( !featureProfile || !featureProfile->getSRS() )
{
OE_WARN << LC << "Feature data has no spatial reference!" << std::endl;
return 0L;
}
osg::ref_ptr<FeatureCursor> cursor = features->createFeatureCursor();
if ( !cursor.valid() )
{
OE_WARN << LC << "Failed to query the feature source!" << std::endl;
return 0L;
}
//SceneControlBin* priorityBin = canvas->getSceneControls();
unsigned count = 0;
std::set<std::string> antiDupeSet;
while( cursor->hasMore() )
{
Feature* feature = cursor->nextFeature();
Geometry* geom = feature->getGeometry();
if ( !geom )
continue;
// we will display the country name:
std::string text = feature->getString( g_labelAttr );
if ( text.empty() )
continue;
// and use the population to prioritize labels:
float population = feature->getDouble(g_priorityAttr, 0.0);
// remove duplicate labels:
if ( g_removeDupes )
{
if ( antiDupeSet.find(text) != antiDupeSet.end() )
continue;
antiDupeSet.insert(text);
}
// calculate the world location of the label:
osg::Vec3d centerPoint = geom->getBounds().center();
osg::Vec3d mapPoint;
if ( !map->toMapPoint( centerPoint, featureProfile->getSRS(), mapPoint ) )
continue;
osg::Vec3d worldPoint;
if ( !map->mapPointToGeocentricPoint( mapPoint, worldPoint ) )
continue;
// create the label and place it:
osg::MatrixTransform* xform = new osg::MatrixTransform( osg::Matrix::translate(worldPoint) );
xform->setCullCallback( new CullNodeByNormal(worldPoint) );
xform->addChild( new ControlNode(new LabelControl(text)) );
labels->addChild( xform );
++count;
//OE_NOTICE << LC << "Added: " << text << std::endl;
}
OE_NOTICE << LC << "Found " << count << " features. " << std::endl;
return labels.release();
}
