[Octave-bug-tracker] [bug #59418] Document work-arounds for single-precision OpenGL plots

[Markus Mützel]

URL:
  <https://savannah.gnu.org/bugs/?59418>

                 Summary: Document work-arounds for single-precision OpenGL
plots
                 Project: GNU Octave
            Submitted by: mmuetzel
            Submitted on: Thu 05 Nov 2020 01:12:12 PM CET
                Category: Plotting with OpenGL
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Documentation
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: dev
         Discussion Lock: Any
        Operating System: Any

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Details:

There are known issues because the OpenGL graphics backend uses single
precision floating point numbers internally (see e.g. bug #32980).
There are also known work-arounds (mainly re-scaling) for this issue.

Rik wrote in bug #59370:
> Whether as part of this issue report, or a separate one, I think we should
add a @subsection or @subsubsection with workarounds for the OpenGL toolkit. 
The qt toolkit remains the preferred toolkit, and there are specific
strategies for dealing with either large values which exceed the range of a
single type or for data with very fine gradiations which exceeds the
resolution of a single type.

This bug is here to track documentation changes to describe these strategies
and work-arounds.




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