TileLoader::TileLoader(const std::string &service, double latitude,
double longitude, unsigned int zoom, unsigned int blocks,
QObject *parent)
: QObject(parent), latitude_(latitude), longitude_(longitude), zoom_(zoom),
blocks_(blocks), object_uri_(service) {
assert(blocks_ >= 0);
const std::string package_path = ros::package::getPath("rviz_satellite");
if (package_path.empty()) {
throw std::runtime_error("package 'rviz_satellite' not found");
}
std::hash<std::string> hash_fn;
cache_path_ =
QDir::cleanPath(QString::fromStdString(package_path) + QDir::separator() +
QString("mapscache") + QDir::separator() +
QString::number(hash_fn(object_uri_)));
QDir dir(cache_path_);
if (!dir.exists() && !dir.mkpath(".")) {
throw std::runtime_error("Failed to create cache folder: " +
cache_path_.toStdString());
}
/// @todo: some kind of error checking of the URL
// calculate center tile coordinates
double x, y;
latLonToTileCoords(latitude_, longitude_, zoom_, x, y);
center_tile_x_ = std::floor(x);
center_tile_y_ = std::floor(y);
// fractional component
origin_offset_x_ = x - center_tile_x_;
origin_offset_y_ = y - center_tile_y_;
}
TileLoader::TileLoader(const std::string &service, double latitude,
double longitude, unsigned int zoom, unsigned int blocks,
QObject *parent)
: QObject(parent), latitude_(latitude), longitude_(longitude), zoom_(zoom),
blocks_(blocks), qnam_(0), object_uri_(service) {
assert(blocks_ >= 0);
/// @todo: some kind of error checking of the URL
// calculate center tile coordinates
double x, y;
latLonToTileCoords(latitude_, longitude_, zoom_, x, y);
tile_x_ = std::floor(x);
tile_y_ = std::floor(y);
// fractional component
origin_x_ = x - tile_x_;
origin_y_ = y - tile_y_;
}
bool TileLoader::insideCentreTile(double lat, double lon) const {
double x, y;
latLonToTileCoords(lat, lon, zoom_, x, y);
return (std::floor(x) == center_tile_x_ && std::floor(y) == center_tile_y_);
}
