unsigned int
TileSource::getMaxDataLevel() const
{
//If we have no data extents, just use a reasonably high number
if (_dataExtents.size() == 0) return 23;
unsigned int maxDataLevel = 0;
for (DataExtentList::const_iterator itr = _dataExtents.begin(); itr != _dataExtents.end(); ++itr)
{
if (itr->getMaxLevel() > maxDataLevel) maxDataLevel = itr->getMaxLevel();
}
return maxDataLevel;
}
bool
TileSource::hasDataAtLOD( unsigned lod ) const
{
//If no data extents are provided, just return true
if ( _dataExtents.size() == 0 )
return true;
bool intersects = false;
for (DataExtentList::const_iterator itr = _dataExtents.begin(); itr != _dataExtents.end(); ++itr)
{
if ( itr->getMinLevel() <= lod && lod <= itr->getMaxLevel() )
{
intersects = true;
break;
}
}
return intersects;
}
bool
TileSource::hasData(const osgEarth::TileKey& key) const
{
//If no data extents are provided, just return true
if (_dataExtents.size() == 0) return true;
const osgEarth::GeoExtent& keyExtent = key.getExtent();
bool intersectsData = false;
for (DataExtentList::const_iterator itr = _dataExtents.begin(); itr != _dataExtents.end(); ++itr)
{
if (keyExtent.intersects( *itr ) && key.getLevelOfDetail() >= itr->getMinLevel() && key.getLevelOfDetail() <= itr->getMaxLevel())
{
intersectsData = true;
break;
}
}
return intersectsData;
}