https://bugs.kde.org/show_bug.cgi?id=506925
--- Comment #4 from Roger Júnio <rogerjgam...@gmail.com> ---
Hi Martin, I hope this message finds you well.
Following up on my previous report and the valuable discussion around Bug
506925, I wanted to share some further observations and evidence that might
shed more light on the polar graph plotting behavior. I've conducted a couple
more tests that suggest there might be an unexpected rendering aspect in
LabPlot, even when the mathematical equations are straightforward.
I've attached two new screenshots that I hope will be helpful for your
investigation:
LabPlot with r=3: Plotting a Constant Radius
When attempting to plot a very simple constant polar equation, r = 3, with
the ϕ range explicitly set from 0 to 2*pi, LabPlot currently displays only an
arc instead of the expected full circle. This behavior seems to be consistently
observed.
KmPlot with r = cos(4*phi): Comparison
To provide a point of comparison and confirm the mathematical correctness
and desired visualization, I also plotted r = cos(4*phi) in KmPlot, using its
standard configurations. As you can see in the attached image, KmPlot
successfully generates the complete 8-petal rose curve. This comparison
suggests that there might be a subtle difference in how LabPlot handles or
renders polar coordinates, as the same input yields a complete graph in another
application.
I also wanted to mention that I initially encountered this behavior while
following one of LabPlot2's own tutorials.
I truly appreciate the dedication and hard work that goes into developing
LabPlot; it's a fantastic tool for scientific plotting. I'd be very grateful if
you could take another look at this report in light of these new observations
and the attached screenshots. Perhaps there's a specific configuration or an
overlooked detail that could explain this behavior, or maybe a small refinement
that could make polar plotting even more robust.
Thank you again for all your efforts!
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