Ejemplo n.º 1
0
void TileMap::computeMinMaxLevel()
{
    _minLevel = INT_MAX;
    _maxLevel = 0;
    for (TileSetList::iterator itr = _tileSets.begin(); itr != _tileSets.end(); ++itr)
    { 
        if (itr->getOrder() < _minLevel) _minLevel = itr->getOrder();
        if (itr->getOrder() > _maxLevel) _maxLevel = itr->getOrder();
    }
}
Ejemplo n.º 2
0
std::string
TileMap::getURL(const osgEarth::TileKey& tilekey, bool invertY)
{
    if (!intersectsKey(tilekey))
    {
        //OE_NOTICE << LC << "No key intersection for tile key " << tilekey.str() << std::endl;
        return "";
    }

    unsigned int zoom = tilekey.getLevelOfDetail();

    unsigned int x, y;
    tilekey.getTileXY(x, y);

    //Some TMS like services swap the Y coordinate so 0,0 is the upper left rather than the lower left.  The normal TMS
    //specification has 0,0 at the bottom left, so inverting Y will make 0,0 in the upper left.
    //http://code.google.com/apis/maps/documentation/overlays.html#Google_Maps_Coordinates
    if (!invertY)
    {
        unsigned int numRows, numCols;
        tilekey.getProfile()->getNumTiles(tilekey.getLevelOfDetail(), numCols, numRows);
        y  = numRows - y - 1;
    }

    //OE_NOTICE << LC << "KEY: " << tilekey.str() << " level " << zoom << " ( " << x << ", " << y << ")" << std::endl;

    //Select the correct TileSet
    if ( _tileSets.size() > 0 )
    {
        for (TileSetList::iterator itr = _tileSets.begin(); itr != _tileSets.end(); ++itr)
        { 
            if (itr->getOrder() == zoom)
            {
                std::stringstream ss;
                std::string path = osgDB::getFilePath(_filename);
                ss << path << "/" << zoom << "/" << x << "/" << y << "." << _format.getExtension();
                //OE_NOTICE << LC << "Returning URL " << ss.str() << std::endl;
                std::string ssStr;
				ssStr = ss.str();
				return ssStr;
            }
        }
    }
    else // Just go with it. No way of knowing the max level.
    {
        std::stringstream ss;
        std::string path = osgDB::getFilePath(_filename);
        ss << path << "/" << zoom << "/" << x << "/" << y << "." << _format.getExtension();
        std::string ssStr;
		ssStr = ss.str();
		return ssStr;        
    }

    return "";
}