void
TileNode::createChildren(EngineContext* context)
{
// NOTE: Ensure that _mutex is locked before calling this function!
//OE_WARN << "Creating children for " << _key.str() << std::endl;
// Create the four child nodes.
for(unsigned quadrant=0; quadrant<4; ++quadrant)
{
TileNode* node = new TileNode();
if (context->getOptions().minExpiryFrames().isSet())
{
node->setMinimumExpirationFrames( *context->getOptions().minExpiryFrames() );
}
if (context->getOptions().minExpiryTime().isSet())
{
node->setMinimumExpirationTime( *context->getOptions().minExpiryTime() );
}
// Build the surface geometry:
node->create( getKey().createChildKey(quadrant), this, context );
// Add to the scene graph.
addChild( node );
}
}
void
RexTerrainEngineNode::dirtyTerrain()
{
//TODO: scrub the geometry pool?
// clear the loader:
_loader->clear();
if ( _terrain )
{
this->removeChild( _terrain );
}
// New terrain
_terrain = new osg::Group();
this->addChild( _terrain );
// are we LOD blending?
bool setupParentData =
_terrainOptions.morphImagery() == true || // gw: redundant?
this->parentTexturesRequired();
// reserve GPU unit for the main color texture:
if ( _renderBindings.empty() )
{
setupRenderBindings();
}
// Calculate the LOD morphing parameters:
unsigned maxLOD = _terrainOptions.maxLOD().getOrUse(DEFAULT_MAX_LOD);
_selectionInfo.initialize(
0u, // always zero, not the terrain options firstLOD
std::min( _terrainOptions.maxLOD().get(), maxLOD ),
_terrainOptions.tileSize().get(),
_update_mapf->getMapInfo().getProfile(),
_terrainOptions.minTileRangeFactor().get() );
// clear out the tile registry:
if ( _liveTiles.valid() )
{
_liveTiles->releaseAll(_releaser.get());
}
// Factory to create the root keys:
EngineContext* context = getEngineContext();
// 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()->getAllKeysAtLOD( *_terrainOptions.firstLOD(), keys );
// create a root node for each root tile key.
OE_INFO << LC << "Creating " << keys.size() << " root keys.." << std::endl;
unsigned child = 0;
for( unsigned i=0; i<keys.size(); ++i )
{
TileNode* tileNode = new TileNode();
if (context->getOptions().minExpiryFrames().isSet())
{
tileNode->setMinimumExpirationFrames( *context->getOptions().minExpiryFrames() );
}
if (context->getOptions().minExpiryTime().isSet())
{
tileNode->setMinimumExpirationTime( *context->getOptions().minExpiryTime() );
}
// Next, build the surface geometry for the node.
tileNode->create( keys[i], 0L, context );
// Add it to the scene graph
_terrain->addChild( tileNode );
// And load the tile's data synchronously (only for root tiles).
tileNode->loadSync( context );
}
updateState();
// Call the base class
TerrainEngineNode::dirtyTerrain();
}
void
RexTerrainEngineNode::dirtyTerrain()
{
if ( _terrain )
{
this->removeChild( _terrain );
}
// clear the loader:
_loader->clear();
// clear out the tile registry:
if ( _liveTiles.valid() )
{
_liveTiles->releaseAll(_releaser.get());
}
// scrub the geometry pool:
_geometryPool->clear();
// New terrain
_terrain = new osg::Group();
this->addChild( _terrain );
// Build the first level of the terrain.
// Collect the tile keys comprising the root tiles of the terrain.
std::vector<TileKey> keys;
_mapFrame.getProfile()->getAllKeysAtLOD( *_terrainOptions.firstLOD(), keys );
// create a root node for each root tile key.
OE_DEBUG << LC << "Creating " << keys.size() << " root keys." << std::endl;
// We need to take a self-ref here to ensure that the TileNode's data loader
// can use its observer_ptr back to the terrain engine.
this->ref();
for( unsigned i=0; i<keys.size(); ++i )
{
TileNode* tileNode = new TileNode();
if (_terrainOptions.minExpiryFrames().isSet())
{
tileNode->setMinimumExpirationFrames(_terrainOptions.minExpiryFrames().get());
}
if (_terrainOptions.minExpiryTime().isSet())
{
tileNode->setMinimumExpirationTime(_terrainOptions.minExpiryTime().get());
}
// Next, build the surface geometry for the node.
tileNode->create( keys[i], 0L, _engineContext.get() );
// Add it to the scene graph
_terrain->addChild( tileNode );
// And load the tile's data synchronously (only for root tiles).
tileNode->loadSync();
}
// release the self-ref.
this->unref_nodelete();
// Set up the state sets.
updateState();
// Call the base class
TerrainEngineNode::dirtyTerrain();
}
