[Octave-bug-tracker] [bug #39535] FaceAlpha property not working for OpenGL backend

[Rik]

URL:
  <http://savannah.gnu.org/bugs/?39535>

                 Summary: FaceAlpha property not working for OpenGL backend
                 Project: GNU Octave
            Submitted by: rik5
            Submitted on: Fri 19 Jul 2013 04:01:35 PM PDT
                Category: Plotting with OpenGL
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: GNU/Linux

    _______________________________________________________

Details:

The FaceAlpha property determines the transparency of a face.  The FLTK
backend, however, interprets everything that is not 1 (opaque) as 0
(transparent).  The property works with gnuplot.

Example code:


h = fill ([0 1 1 0], [0 0 1 1], 'b');
axis ([-1 2 -1 2]);
set (h, 'facealpha', 0.3);


This seems like it should be possible since OpenGL can handle all kinds of
strange colors/alpha blends.





    _______________________________________________________

Reply to this item at:

  <http://savannah.gnu.org/bugs/?39535>

_______________________________________________
  Message sent via/by Savannah
  http://savannah.gnu.org/