[Octave-bug-tracker] [bug #45137] patch/print: exports too many polygons

[Oliver Heimlich]

URL:
  <http://savannah.gnu.org/bugs/?45137>

                 Summary: patch/print: exports too many polygons
                 Project: GNU Octave
            Submitted by: oheim
            Submitted on: Di 19 Mai 2015 00:01:35 CEST
                Category: Plotting with OpenGL
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Inaccurate Result
                  Status: None
             Assigned to: None
         Originator Name: Oliver Heimlich
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: Any

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Details:

The export of 3D patches to eps creates too many objects, the exports to png
is also affected and looks strange (see attachements). On-screen rendering is
fine.

Behaviour in version 3.8.2 and 4.0.0rc4 seems to be the same regarding this
particular issue. I can observe it under GNU/Linux and Windows.

The number of polygons used during export is also affected by the GL driver. I
have a dual graphics card in my notebook (Intel HD 4600 and NVIDIA GeForce GTX
860M), the intel driver creates a lot more polygons than the nvidia driver
(41150 vs 17191).

Another example, in the 6th demo of patch (red/blue pyramid) the blue triangle
is split into 5 triangles during export.

I can also provide eps files if needed.



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File Attachments:


-------------------------------------------------------
Date: Di 19 Mai 2015 00:01:35 CEST  Name: intel-4.0.0rc4.png  Size: 231kB  
By: oheim

<http://savannah.gnu.org/bugs/download.php?file_id=34049>
-------------------------------------------------------
Date: Di 19 Mai 2015 00:01:35 CEST  Name: nvidia-3.8.2.png  Size: 106kB   By:
oheim

<http://savannah.gnu.org/bugs/download.php?file_id=34052>
-------------------------------------------------------
Date: Di 19 Mai 2015 00:01:35 CEST  Name: intel-3.8.2.png  Size: 230kB   By:
oheim

<http://savannah.gnu.org/bugs/download.php?file_id=34051>
-------------------------------------------------------
Date: Di 19 Mai 2015 00:01:35 CEST  Name: nvidia-4.0.0rc4.png  Size: 103kB  
By: oheim

<http://savannah.gnu.org/bugs/download.php?file_id=34050>

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