[Octave-bug-tracker] [bug #48814] clabel: wrong label rotation

[Pantxo Diribarne]

Update of bug #48814 (project octave):

                 Summary: Rotated text in any print export => clabel: wrong
label rotation 

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Follow-up Comment #1:

There are two issues here:
* On screen when using opengl based toolkits the labels are displayed with a
rotation = 0° because the actual "rotation" property of text objects is (a
bit) lower than 90°. 

...
h = clabel(c,h, power_scale_labels);
get (h, "rotation")

This is a known bug of the opengl text renderer, see #33118. The only
workaround is to use gnuplot toolkit. 

* The computed rotation seams wrong: the orientation of the labels should be
parallel to the contour lines. See e.g. "demo clabel 1".
If you're happy with horizontal labels then a workaround is to set the
rotation manually

h = clabel(c,h, power_scale_labels);
set (h, "rotation", 0)
 

So finally it is the printed output that is correct :-). Retitling the report
to reflect the second issue.

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