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[Octave-bug-tracker] [bug #63051] Reparented graphics objects may be dra

From: Pantxo Diribarne
Subject: [Octave-bug-tracker] [bug #63051] Reparented graphics objects may be drawn in wrong order
Date: Fri, 16 Sep 2022 07:59:35 -0400 (EDT)

Follow-up Comment #5, bug #63051 (project octave):

@Rik: I have looked at this issue a bit and haven't been able to identify its
root cause (lines are drawn in the same order in gl-render.cc but sorted
differently back to front depending on the number of lines, very strange).
AFAICS, running the same offending example using patch objects rather than
lines doesn't trigger the bug:

clf; hold on
h1 = hggroup ();
h2 = patch ([0 1 0.5], [0 0 1], "r");
h3 = patch ([0 1 0.5], [1 1 0], "b", "parent", h1);

and the blue patch is drawn below the red one, as expected...

So in the end, bisecting seems difficult (we'll have to inspect visually each
resulting figure) but necessary.


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