Re: PostScript circle printed with unwanted line

[ArnoldTheresius]

pls wrote
> ...
> This line doesn’t show when I use Ghostscript 9.14 to interpret the
> following file (I obviously had to change some values because PostScript
> normally uses units of "points" for placing graphics on the page (in LP
> the unit seems to be millimeters) and because the zero coordinates in
> PostScript are in the bottom left corner of the page):
> 
> %!PS
> 
> /doACircle
>   { 0 0 54 0 360 arc stroke } def
> 
> %  doACircle
> 
>   300 425 translate doACircle
> 
> showpage
> 
> 
> So I would think this is a bug.
> 
> hth
> patrick
> _______________________________________________
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> bug-lilypond@

> https://lists.gnu.org/mailman/listinfo/bug-lilypond
> 
> 
> postscript-circle.pdf (17K)
> <http://lilypond.1069038.n5.nabble.com/attachment/175881/0/postscript-circle.pdf>

But, if there is any other graphic command (with a moveto) before your
doACircle, you will find this line in Ghostscript, too:
%!PS
 
 200 500 moveto
 /Helvetica findfont 10 scalefont setfont
 (doACircle examples) show

/doACircle 
  { 0 0 54 0 360 arc stroke } def 

  300 425 translate doACircle 
  
  150 0 translate 0 0 moveto doACircle

showpage 

So, I think, it would be an enhancement request to invalidate the 'current
point' whenever
a \postscript markup starts - but I do not have the postscript command in
mind which
will do this.

Instead you may try this postscript procedure definition:
/drawACircle % x_origin y_origin radius
  { 3 copy pop moveto
    dup 0 rmoveto
    0 360 arc stroke
  } def

ArnoldTheresius



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