[Octave-bug-tracker] [bug #48142] the disappearance of the plotted lines after "axis equal"

[Rik]

Update of bug #48142 (project octave):

                  Status:                    None => Confirmed              
                 Summary: the disappearnce of the plotted lines after "axis
equal" => the disappearance of the plotted lines after "axis equal"

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Follow-up Comment #1:

There are two different problems here.  This bug report is about issues with
"axis equal".  If you are having a "freeze" with the version of Octave made by
Tatsuro you should report that in a different bug report.

Steps to reproduce axis bug:


x=[0 1 1/2 0]
y=[0 0 sqrt(3)/2 0]
plot(x,y)
axis equal
## triangle disappears
axis ([-2 2 -2 2])
## Figure re-appears


The problem is most likely in gl-render.cc where Octave tries to avoid drawing
lines which are outside of the current axis limits.  This speeds things up
because there may be significant portions of the plot which are outside the
current viewing limits.  However, there definitely seems to be something wrong
here.  My last command resets the axis to encompass a very wide area around
the existing triangle and cause the triangle to re-appear.

As a workaround, you can also use the gnuplot toolkit instead of qt or fltk.


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