[Octave-bug-tracker] [bug #57980] When plotting a cube it is only transparent when seen from the back

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?57980>

                 Summary: When plotting a cube it is only transparent when
seen from the back
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Tue 10 Mar 2020 12:42:31 AM UTC
                Category: Plotting with OpenGL
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name: Steve Shearer
        Originator Email: address@hidden
             Open/Closed: Open
                 Release: 5.1.0
         Discussion Lock: Any
        Operating System: Microsoft Windows

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Details:

Hi,

I am a newbie, I hope I'm following proper procedure. I did look in the
tracker to see if this issue has been reported - apparently it has not.

I am plotting a group of cubes, mainly on the z=0 plane, with the position
representing time and frequency. I'd like for the cubes to be transparent, so
I have set FaceAlpha = 0.2 or so.

The cubes are not really transparent when viewed from the front, but they
become transparent when the graph is rotated around so one can view from the
back.
 
I have attached a simple script with comments illustrating the issue.

Many thanks
Steve




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File Attachments:


-------------------------------------------------------
Date: Tue 10 Mar 2020 12:42:31 AM UTC  Name: transparency_bug.m  Size: 1KiB  
By: None
Script to illustrate the bug
<http://savannah.gnu.org/bugs/download.php?file_id=48573>

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