[Octave-bug-tracker] [bug #34523] surf() with gnuplot does not handle FaceColor correctly

[Dan Sebald]

Follow-up Comment #16, bug #34523 (project octave):

OK.  I had looked at the latest 5.1 documentation and it doesn't list "border"
in the options either.  (It is a subtopic.  The hidden3d/pm3d documentation is
spread out over several areas.)  So I was hoping that "border" had been
introduced prior to the linetype, etc.  Guess not.

I've gnuplot 4.6 compiled here.  It doesn't seem to have any of the "set pm3d
border/linetype/linecolor/etc" options.  In fact, I don't understand why this
"border" option was added.  It appears that gnuplot can add the lines with
something like:

set hidden3d front
splot x*y with pm3d, x*y with lines

which should handle the hidden 3d removal of lines.

I'm going to take a couple days to inquire with gnuplot developers what
"border" is for.  If there isn't a salient reason for that, I think I'll try
to rework the changeset slightly to try avoiding its and include another set
of data for the mesh lines.

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