[Octave-bug-tracker] [bug #34523] linestyle not always used for 3D plots (gnuplot)

[Rik]

Update of bug #34523 (project octave):

                 Summary: surf() with gnuplot does not handle FaceColor
correctly => linestyle not always used for 3D plots (gnuplot)

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Follow-up Comment #23:

I think this is a good start.  I applied the patch here
(http://hg.savannah.gnu.org/hgweb/octave/rev/21c3641422e0).

The Summary of this bug, FaceColor for surf with gnuplot, has been fixed. 
However, there are now some issues with linestyle for 3-D plots.

Using the test code:


graphics_toolkit("gnuplot");
figure();
[x, y] = meshgrid (-2:.2:2); 
t = linspace (-2, 2, 10); 
z = (1+x.*y).*(x+y); 
h = surf (x, y, z, "FaceColor", [.3 .5 .3], "EdgeColor", [0 0 0]);
hold on 
plot3 (t, t, t)

set(h, 'edgecolor', 'r')
set(h, 'linewidth', 3)
set(h, 'linestyle', ':')
set(h, 'facecolor', 'y')


With gnuplot 5.0.1, the linestyles "--", "-." don't seem to work.

With gnuplot 4.6.6, all linestyles are rendered as "-" (solid).  If I try to
turn off lines completely with "set (h, 'linestyle', 'none'" I get a bunch of
errors.


splot "-" binary format='%float64' record=21x21 using ($1):($2):($3):($4)
title "" with pm3d linecolor rgb variable , "-" binary format='%float64'
record=21x21 using ($1):($2):($3) title "" with  linetype 9 , "-" binary
format='%float64' record=10 using ($1):($2):($3) title "" with lines linetype
11 ;
            octave:15>                                                        
                                                                              
                                                                   ^
         line 0: unrecognized plot type


Note that the linestyles work correctly for a 2D plot such as "plot (1:10,
'o:')"


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