[Octave-bug-tracker] [bug #39535] FaceAlpha property not working for OpenGL backend

[Markus Mützel]

Follow-up Comment #12, bug #39535 (project octave):

I tried with your patch from comment #11 and it compiles without any errors.
With your test from comment #9, I also see opaque faces in Evince. But the
same pdf renders with transparency in Acrobat Reader. The svg also looks
good.

I also tried to print the example with the surfaces from comment #8. But both
the svg and the pdf didn't look good and it took ages to render in Acrobat
Reader. Is your patch supposed to enable printing of transparent surfaces as
well?
I tried the following:

clf
[Xs, Ys, Zs] = sphere ();
hs = surf (2*Xs, 2*Ys, 2*Zs-3);
hold on

[Xp, Yp, Zp] = peaks ();
hp = surf (Xp, Yp, Zp, "facealpha", 0.8, "edgecolor", "none");
axis equal
view (2)
print alpha_surf.svg
print -dpdflatexstandalone alpha_surf.tex
system ("pdflatex alpha_surf.tex")



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