void
OSGTerrainEngineNode::addImageLayer( ImageLayer* layerAdded )
{
if ( !layerAdded )
return;
if (!_isStreaming)
{
refresh();
}
else
{
// visit all existing terrain tiles and inform each one of the new image layer:
TileVector tiles;
_terrain->getTiles( tiles );
for( TileVector::iterator itr = tiles.begin(); itr != tiles.end(); ++itr )
{
Tile* tile = itr->get();
StreamingTile* streamingTile = 0L;
GeoImage geoImage;
bool needToUpdateImagery = false;
int imageLOD = -1;
if ( !_isStreaming || tile->getKey().getLevelOfDetail() == 1 )
{
// in standard mode, or at the first LOD in seq/pre mode, fetch the image immediately.
TileKey geoImageKey = tile->getKey();
_tileFactory->createValidGeoImage( layerAdded, tile->getKey(), geoImage, geoImageKey );
imageLOD = tile->getKey().getLevelOfDetail();
}
else
{
// in seq/pre mode, set up a placeholder and mark the tile as dirty.
geoImage = GeoImage(ImageUtils::createEmptyImage(), tile->getKey().getExtent() );
needToUpdateImagery = true;
streamingTile = static_cast<StreamingTile*>(tile);
}
if (geoImage.valid())
{
const MapInfo& mapInfo = _update_mapf->getMapInfo();
double img_min_lon, img_min_lat, img_max_lon, img_max_lat;
geoImage.getExtent().getBounds(img_min_lon, img_min_lat, img_max_lon, img_max_lat);
//Specify a new locator for the color with the coordinates of the TileKey that was actually used to create the image
osg::ref_ptr<GeoLocator> img_locator = tile->getKey().getProfile()->getSRS()->createLocator(
img_min_lon, img_min_lat, img_max_lon, img_max_lat,
!mapInfo.isGeocentric() );
//Set the CS to geocentric if we are dealing with a geocentric map
if ( mapInfo.isGeocentric() )
{
img_locator->setCoordinateSystemType( osgTerrain::Locator::GEOCENTRIC );
}
tile->setCustomColorLayer( CustomColorLayer(
layerAdded,
geoImage.getImage(),
img_locator.get(), imageLOD, tile->getKey() ) );
// if necessary, tell the tile to queue up a new imagery request (since we
// just installed a placeholder)
if ( needToUpdateImagery )
{
streamingTile->updateImagery( layerAdded, *_update_mapf, _tileFactory.get() );
}
}
else
{
// this can happen if there's no data in the new layer for the given tile.
// we will rely on the driver to dump out a warning if this is an error.
}
tile->applyImmediateTileUpdate( TileUpdate::ADD_IMAGE_LAYER, layerAdded->getUID() );
}
updateTextureCombining();
}
}
