[Octave-bug-tracker] [bug #46997] surface with "FaceColor" set to "texturemap" display incorrectly and issue an OpenGL warning

[Markus Mützel]

Follow-up Comment #2, bug #46997 (project octave):


graphics_toolkit

 returns "qt".

The behavior is the same when I change the graphics toolkit to "fltk": The
"oldest" surface with "FaceColor" set to "texturemap" is displayed with only
one color and the same warning is displayed.

When I set the graphics toolkit to "gnuplot", the "oldest" surface set to
"texturemap" is drawn with differently colored rectangles (as opposed to only
one color when it fails) and no warning message is displayed. However, it
looks like "texturemap" is not implemented at all for "gnuplot". In the
example in 46997#comment0, I see surfaces with 9x9 colored rectangles - as
would be correct for "FaceColor" set to "flat". With "FaceColor" set to
"texturemap", it would be correct to see surfaces with 10x10 colored
rectangles.
But I guess that is a different bug. (Maybe a warning should be issued in this
case?)

I tried the same on a VM with Windows 10 with different results (but also
failing). But as there is a warning during installation that Octave might
probably fail on Windows 8 (and later?), I guess it makes no sense to report
those, does it?

Please, let me know if I can help with any more infos or tests.

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