[Octave-bug-tracker] [bug #59132] line invisible behind patch with given alpha

[Hg200]

URL:
  <https://savannah.gnu.org/bugs/?59132>

                 Summary: line invisible behind patch with given alpha
                 Project: GNU Octave
            Submitted by: hg200
            Submitted on: Fri 18 Sep 2020 07:05:51 PM UTC
                Category: Plotting with OpenGL
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: other
         Discussion Lock: Any
        Operating System: GNU/Linux

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Details:

Attached what i see in Matlab 2018 compared to Octave hg id: 9beec32ba3d6.
Line behind transparent patch is invisible in Octave but is visible in
Matlab.

++
x = [0; 1; 1; 0];
y = [0; 0; 1; 1];
z = [0; 0; 0; 0];
patch (x, y, z, [1; 1; 1; 1], 'facealpha', 0.5);
view (3);
line ([0, 1], [0, 1], [-0.1, 0.1], 'color', 'k', 'linewidth', 1);
grid 'on';
--

BTW: Surf-plot behind patch is visible (i.e. displayed correctly)



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File Attachments:


-------------------------------------------------------
Date: Fri 18 Sep 2020 07:05:51 PM UTC  Name: matlab_vs_octave.png  Size: 33KiB
  By: hg200

<http://savannah.gnu.org/bugs/download.php?file_id=49811>

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