bugGNU Octave - Bugs: bug #37598, OpenGL lines render as dotted...

 
 

bug #37598: OpenGL lines render as dotted lines on some drivers

Submitted by:  Mike Miller <mtmiller>
Submitted on:  Thu 18 Oct 2012 08:08:05 PM UTC  
 
Category: Plotting with OpenGLSeverity: 3 - Normal
Priority: 5 - NormalItem Group: Incorrect Result
Status: FixedAssigned to: None
Originator Name: Open/Closed: Closed
Release: devOperating System: GNU/Linux

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Sun 16 Feb 2014 03:33:49 PM UTC, comment #3:

This is fixed for me on the gui-release branch now with the following changeset:

http://hg.savannah.gnu.org/hgweb/octave/rev/c6e5466d74fe

Mike Miller <mtmiller>
Project Member
Sat 12 Oct 2013 08:03:11 PM UTC, comment #2:

Thanks for testing and confirming.

I also forgot to mention that the graphics card I see this on is a hybrid Optimus setup (Intel built-in plus Nvidia). When I use the Intel graphics I see the dotted lines as originally reported. If I use the Nvidia card (using bumblebee / optirun) the lines appear solid as they should.

Mike Miller <mtmiller>
Project Member
Sat 12 Oct 2013 07:58:41 PM UTC, comment #1:

This issue also affects the current 3.7.7+ version of octave.

I'm using the intel driver on Ubuntu 12.04.3.

The plotted line and grid line becomes visible if its width is set to 1 (instead of 0.5).

I could not reproduce this error with a simple fltk program where is plotted a line of 0.5 width. The line appears in all cases as a solid line independently of the setting of GL_LINE_SMOOTH.

Alexander Barth <abarth>
Thu 18 Oct 2012 08:08:05 PM UTC, original submission:

I asked this on the maintainers list first and the consensus was that this is not correct and it should be fixed to render the same on all graphics hardware.

https://mailman.cae.wisc.edu/pipermail/octave-maintainers/2012-October/030403.html

FLTK plots on a Debian GNU/Linux system using the i965 Intel graphics driver appear as in this capture:

http://mailman.cae.wisc.edu/pipermail/octave-maintainers/attachments/20121012/a00a1866/attachment.png

All other systems I have tried show up as in this capture:

http://mailman.cae.wisc.edu/pipermail/octave-maintainers/attachments/20121012/a00a1866/attachment-0001.png

which I assume is the way they should appear.

An uninitialized antialiasing setting was proposed as the possible problem here.

Mike Miller <mtmiller>
Project Member

 

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    Follow 3 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Sun 16 Feb 2014 03:33:49 PM UTCmtmillerStatusConfirmed=>Fixed
      Open/ClosedOpen=>Closed
    Sat 12 Oct 2013 08:03:11 PM UTCmtmillerStatusNone=>Confirmed

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