Renamed to summarise_path(), which returns the same measures. The name
suggested a summary of add_tortuosity()'s windowed output, which it
never was: it measures the whole path. To summarise the windowed
measures, use summarise_aniframe().
This returns exactly what it did, with the columns total_path_length and
emax, which summarise_path() calls total_distance and e_max.
Value
As summarise_path(), with total_path_length and emax in
place of total_distance and e_max.