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Is this a bug in Gnuplot or gdlib?
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From: m s. <mw...@us...> - 2021-02-05 00:39:45
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<p>I was checking out v5.4.1 on centos 7.2 with gdlib 2.3.0. I
simplified the problem down to this script.</p>
<blockquote>
<p>unset grid<br>
set nokey<br>
set clip two<br>
<br>
set title "GD Line Bug"<br>
set size 1,1<br>
set term png small truecolor butt size 500,400 <br>
unset border<br>
unset tics<br>
set output 'mike.png'<br>
set xr [0:6];</p>
set yr [0:2]<br>
<br>
plot '-' u 1:2 notitle w l lt 1 lw 9<br>
2.0 1.0<br>
5.0 1.0<br>
e<br>
</blockquote>
<p>I get a small, but noticeable dash at the beginning of the
plotted line. The larger the linewidth the more noticeable it
becomes.</p>
<p>I inserted a print statement in the PNG_vector function in
gd.trm. What I see are two calls to PNG_vector. The first call
tries to plot a line of zero length. The second call plots the
correct line. <br>
</p>
<p>So why is the zero length line plotted?</p>
<p>MikeS</p>
<p><br>
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