[pstricks] linewidth

[Christoph Bersch]

Hi,

Am 04.03.2013 17:56, schrieb Patrice MÉGRET:
>
> \psline[linewidth=0pt,linestyle=dashed](1,1)
>
> When linestyle is ‘dotted’ and linewidth is 0pt nothing is displayed as
> I expect but when linestyle is ‘dashed’ or ‘solid’ with linewidth=0pt, a
> line is nevertheless drawn?

I do also see a line with dotted style.

> Is the normal behavior?

Yes, this is normal. Quoting the Postscript language reference 
<www.adobe.com/products/postscript/pdfs/PLRM.pdf>:

setlinewidth (which is called when using the PSTricks linewidth parameter):

A line width of 0 is acceptable, and is interpreted as the thinnest line 
that can be
rendered at device resolution—1 device pixel wide. However, some devices 
can-
not reproduce 1-pixel lines, and on high-resolution devices, they are 
nearly invis-
ible. Since the results of rendering such “zero-width” lines are 
device-dependent,
their use is not recommended.

To suppress the line you must use linestyle=none.

Best regards,
Christoph