Re: Comparing plots to Matlab

[Kai Habel]

 On 02.12.2010 10:07, Kai Habel wrote:
>  On 02.12.2010 07:50, John W. Eaton wrote:
> > On  1-Dec-2010, Søren Hauberg wrote:
> >
> > | I have then tried to run the generated script in Octave with the 
> > gnuplot
> > | backend (it crashes the FLTK backend)
> >
> > I put "pause (1)" calls before and after each call to the print
> > function and also removed the
> >
> >    visible = get (0, 'defaultfigurevisible');
> >    set (0, 'defaultfigurevisible', 'off');
> >
> > lines.  Then it mostly runs with the FLTK backend.  There are some
> > strange effects with the plot windows.  They are displayed (as I
> > expected) but they are sometimes jumbled.  I have no idea what could
> > cause that to happen.
> >
> > Printing the slice demo fails with the following ghostscript error:
> >
> >    Error: /undefined in nan
> >    Operand stack:
> >       --dict:1161/1684(ro)(G)--   --nostringval--   276.14   99.1793
> >    Execution stack:
> >       %interp_exit   .runexec2   --nostringval--   --nostringval--   
> > --nostringval--   2   %stopped_push   --nostringval--   
> > --nostringval--   --nostringval--   false   1   %stopped_push   
> > 1878   1   3   %oparray_pop   1877   1   3   %oparray_pop   
> > --nostringval--   1861   1   3   %oparray_pop   1755   1   3   
> > %oparray_pop   --nostringval--   %errorexec_pop   .runexec2   
> > --nostringval--   --nostringval--   --nostringval--   2   
> > %stopped_push   --nostringval--
> >    Dictionary stack:
> >       --dict:1161/1684(ro)(G)--   --dict:0/20(G)--   
> > --dict:75/200(L)--   --dict:40/64(L)--
> >    Current allocation mode is local
> >    GPL Ghostscript 8.71: Unrecoverable error, exit code 1
> >    warning: broken pipe -- some output may be lost
> >
> > A few other plots apparently fail to print because the files are
> > missing.
> >
> > I took your page and inserted the fltk plots.  The results are here:
> >
> >    http://jweaton.org/compare-plots.html
> >
> > Grab the png files and use them on the Octave Forge site if you'd
> > like.
> >
> > jwe
> John and Soeren,
>
> which octave version have you used? I ask because I see a different 
> output for the 2nd clabel test using the current tip. My labels are 
> not rotated.
>
> Kai

I am confused.

Figure [1] clearly looks like that it was generated using the fltk backend.
But as I said before I see with a recent tip and the fltk backend 
non-rotated contour labels only. And when looking at the code in 
gl-render.cc (opengl_renderer::render_text) I see only the handling of 
the special cases 0,90,180,270 degree rotation. Those work here fine. 
So, where is the code for the general case of rotated text and the 
opengl_renderer?

Can anybody shed some light on this?

Kai

[1] http://octave.sourceforge.net/compare_plots/fltk/clabel_2_1.png