class MTPGraph {
void update_positivized_lengths();
+ // It may happen that numerical errors in update_positivized_lengths
+ // make the resulting lengths negative, albeit very small. The
+ // following method force such length to zero, and print the
+ // correction when compiled in VERBOSE mode.
void force_positivized_lengths();
// Set the edge pred_edge_toward_source correspondingly to the path
// of shortest length. The current implementation is not Dijkstra's!