[Octave-bug-tracker] [bug #53229] Non uniform grid color in svg printout

[Pantxo Diribarne]

URL:
  <http://savannah.gnu.org/bugs/?53229>

                 Summary: Non uniform grid color in svg printout 
                 Project: GNU Octave
            Submitted by: pantxo
            Submitted on: Mon 26 Feb 2018 10:17:26 PM UTC
                Category: Plotting with OpenGL
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Inaccurate Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: GNU/Linux

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Details:

In svg output, where grid transparency is supported, I observe small dark
patches along grid lines in 3D figures.


clf; axes (); view (3); grid on
print splitted_before.svg


Actually grid lines are split into smaller individual segments (probably due
to depth conflicts with the back plane) and what we see is the intersections.

The attached patch is a workaround in which we use "butt" linecap for grid
lines in order to avoid intersections where transparency may occur.

I also attached the svg produced before and after the patch.



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File Attachments:


-------------------------------------------------------
Date: Mon 26 Feb 2018 10:17:26 PM UTC  Name: splitted_after.svg  Size: 47KiB  
By: pantxo

<http://savannah.gnu.org/bugs/download.php?file_id=43403>
-------------------------------------------------------
Date: Mon 26 Feb 2018 10:17:26 PM UTC  Name: splitted_before.svg  Size: 47KiB 
 By: pantxo

<http://savannah.gnu.org/bugs/download.php?file_id=43404>

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