[Octave-bug-tracker] [bug #53958] 'light' function not working for some plots

[Richard]

URL:
  <http://savannah.gnu.org/bugs/?53958>

                 Summary: 'light' function not working for some plots
                 Project: GNU Octave
            Submitted by: crobar
            Submitted on: Mon 21 May 2018 03:32:30 PM UTC
                Category: Plotting with OpenGL
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: Richard Crozier
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: GNU/Linux

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Details:


The light function is supposed to add lighting to a 3D plot. I have found a
case where the light function seems to have no effect no matter what I do. I
have attached a data file "shape_data.mat" and a script, which uses it to
demonstrate the problem.

I have also attached images and figures with the expected output from Matlab,
and the actual output from Octave.

The examples in the documentation for light *do* work for me as expected.

I wasn't able to reduce the problem any further, the attached data is
essentially an stl file that has been loaded.

I'm using the stable dev branch 



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File Attachments:


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Date: Mon 21 May 2018 03:32:30 PM UTC  Name: test_light.m  Size: 2KiB   By:
crobar

<http://savannah.gnu.org/bugs/download.php?file_id=44193>
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Date: Mon 21 May 2018 03:32:30 PM UTC  Name: how_it_should_look.png  Size:
22KiB   By: crobar

<http://savannah.gnu.org/bugs/download.php?file_id=44194>
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Date: Mon 21 May 2018 03:32:30 PM UTC  Name: how_it_looks_in_octave.png  Size:
21KiB   By: crobar

<http://savannah.gnu.org/bugs/download.php?file_id=44195>
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Date: Mon 21 May 2018 03:32:30 PM UTC  Name: how_it_looks_in_octave.ofig 
Size: 286KiB   By: crobar

<http://savannah.gnu.org/bugs/download.php?file_id=44196>

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