[Octave-bug-tracker] [bug #32980] for backend FLTK, real is used for axes. double should be used

[Michael Godfrey]

Follow-up Comment #13, bug #32980 (project octave):

John,

The code is specific in the sense that it tests for
the one current backend that restricts plot data to
single.  I looked in the fltk code, but could not find
a way to implement these tests there.  Also, it is
possible that there will be other backends that only
support single precision.

Currently the code uses realmax("double") for all cases
other than fltk, but this is pretty meaningless.  This
test can never, currently, fail.  I will change the code
to be fltk/OpenGL specific.

I thought about the rescaling and this should be possible,
but a lot more work in code that I am not familiar with.
It would be great if someone would do that.

In the meantime, it is not good that users may experience 
mysteriously incorrect plots due to overflow of singles
in fltk/OpenGL.



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