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[Octave-bug-tracker] [bug #56979] Using plot3 parts of the curves are no
From: |
Pantxo Diribarne |
Subject: |
[Octave-bug-tracker] [bug #56979] Using plot3 parts of the curves are not visible |
Date: |
Wed, 2 Oct 2019 15:53:04 -0400 (EDT) |
User-agent: |
Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0 |
Update of bug #56979 (project octave):
Category: Plotting => Plotting with OpenGL
Item Group: None => Inaccurate Result
Release: 5.1.0 => dev
Operating System: Microsoft Windows => Any
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Follow-up Comment #2:
I can confirm the bug shown in comment #1. I think there are two issues:
* z-fighting between grid lines and (1) plot lines or (2) axes main lines
(y-axis in second image). The workaround is to either avoid using grids in 3D
plots or manually change zlim so that grid and plot positions don't overlap
(won't solve(2)), e.g:
...
ylim([0.95 2.05])
* Even without any grid line or background axes plane, curves with high
definition have spurious white pixels (onscreen and in raster printout). When
the anti-aliasing is turned off, this effect disappears as noted in comment 9
of bug #54554. My guess is that the OpenGL rasterizer has hard time deciding
what to do at line segment junctions.
Marking bug as OpenGL specific.
_______________________________________________________
Reply to this item at:
<https://savannah.gnu.org/bugs/?56979>
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