Re: [Plplot-devel] What are the development priorities for the csironn library?

[Alan W. I. <Ala...@gm...>]

On 2021-07-04 01:16-0700 Alan W. Irwin wrote:

> [...* It "would be nice"] for libcsironn to change its dependence on libqhull to a
>  dependence on libqhull_r.

DONE (thanks mostly to Stefan).  See <https://sourceforge.net/p/plplot/plplot/ci/b6023bf465e9b024d3b161ba52ef01a1aff3e901/> for the details.

> * It "would be nice" to update our fork to the latest version of nn-c.
>  The reason I suggest this as a worthwhile goal is I assume that
>  Pavel's fairly constant development of nn-c since 2003 has found and
>  fixed more bugs in the nn-c code than we have found and fixed in our
>  fork of that code.  As a short-cut to make this development topic
>  easier, our fork could continue to ignore everything in nn-c that is
>  not relevant to the problem of interpolating from non-gridded sample
>  points to gridded sample points, but see the next item below.  I haven't
>  looked at what would be required by this development topic, but my
>  guess is it could be implemented by simply replacing the
>  csironn routines with the corresponding nn-c routines while keeping
>  just the part of of the csironn routines that set up and call
>  the libqhull routines and/or fix bugs in the nn-c version of these
>  routines that are already in csironn and which have not already
>  been fixed by Pavel.  So it might all end up as a glorious git conflict
>  resolution.  :-)
>
> * The above "would be nice" development topic should be done first,
>  but in addition it "would be nice" to not strip nn-c at all. My
>  guess is what was stripped was pretty minor stuff since the csironn
>  ability to interpolate from non-gridded to gridded sample points
>  captures all the essential functionality of nn-c.  But regardless of
>  that question, the result should be that csironn should have all the
>  functionality of modern nn-c (i.e., it passes all nn-c tests) with
>  the only changes being conversion of *all* triangle library calls to
>  the equivalent libqhull calls.

I would be happy to see patches or pushes implementing these development topics.  :-)

Alan
__________________________
Alan W. Irwin

Research affiliation with the Department of Physics and Astronomy,
University of Victoria, Victoria, BC, Canada.

Programming affiliations with the FreeEOS equation-of-state
implementation for stellar interiors (freeeos.sf.net); the Time
Ephemerides project (timeephem.sf.net); PLplot scientific plotting
software package (plplot.org); the libLASi project
(unifont.org/lasi); the Loads of Linux Links project (loll.sf.net);
and the Linux Brochure Project (lbproject.sf.net).
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