[makeinstancesufo] no longer allows extrapolation

[frankrolf]

When explaining the principles of interpolation to students today, I noticed that the tool no longer allows instance values that go beyond the defined axis extremes (e.g. -200 in a 0 - 1000 axis).

The result in the above case is just an instance of interpolation value 0 (no complaints from makeinstancesufo)

I know extrapolation is not a typical use case, but it is allowed by mutator and great for demonstration and exploration. Could this change have happened with the addition of varLib in 7f09153 ?

[josh-hadley]

Ohh...yes, quite possibly. I think @punchcutter should check/confirm but I think this:
7f09153#diff-f2284e0a884b16cdbcc94dd2fea1d2caR416

...should probably be store_true instead of store_false. @frankrolf try running your command with --use-varlib, which sounds counter-intuitive, but with the current implementation, it means don't use varLib (set useVarLib to False) which should use MM and re-enable extrapolation. If that works, then definitely the above line is the issue and should be changed to store_true.

[punchcutter]

Oh, that's not right. Guess I'd better check those tests again, too.

[frankrolf]

Confirming that the --use-varlib option yields the result expected from Mutator.
True ¯_(ツ)_/¯ False