[Octave-bug-tracker] [bug #44181] Tesselation lines visible in plot output of patches

[Pantxo Diribarne]

Follow-up Comment #8, bug #44181 (project octave):


the rest of comment #7, I hope:


close all
x= [0 1 1 0];
y= [0 0 1 1];
patch (x,y,'r')
title ('foo^{bar}_{toto} \delta éàùçè', 'interpreter', 'tex')
print toto.svg
print toto.pdf


I attached the svg and pdf outputs. As far as I can see the tessellation line
is visible in both formats whether I use Okular or Inkscape to render them. 
I also asked on Inkscape mailing list the reason why we saw the separation
between to tangent triangles [1]: I was explained that it was due to
inkscape's anti-aliasing and that it had been improved in the last release.
FWIW the Inkscape's eps/pdf output of two perfectly neighbor triangles is not
rendered better than Octave's in Okular and Evince.

My impression is that there is nothing simple to do about it on our side: it
is the viewers' job to handle those visual artifacts. 
Improving this would mean regrouping triangles into their original polygon
(patch) representation: sounds like rewriting a renderer not based on OpenGL
would be easier ... 

[1] http://inkscape.13.x6.nabble.com/Tesselation-lines-in-svg-td4973255.html

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