ready Library Method
Short Description: Return (download) Status
Signature: x.ready ()
Class: taccglMTLFile Class
ready becomes "ready"
if and when the associated MTL file has been downloaded,
parsed, and is ready for use. During downloading it returns "loading".
In case of an error "error" is returned and in case of ddmode "ddmode" is returned.
This function is normally not used, because it is often sufficient
to check taccglOBJFile.ready.
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