Extract WAD contents into existing directory.
wad.extract(
wad_filepath,
outdir = getwd(),
file_ext_mapping = wad_dir.fileext.mapping()
)
character string, path to input WAD file.
character string, the output directory in which the files should be created. The filenames are derived from the data in the WAD.
named list, with keys corresponding to the type names and values are file extensions, including the dot, to use for them.