Re: Enhanced Mode and Postscript (again)

[Philipp K. J. <ja...@ie...>]

Cool. Thanks. That's good advice.

Best,

			Ph.


On Thursday 24 July 2008 14:54, you wrote:
> On Thursday 24 July 2008 13:48:52 Philipp K. Janert wrote:
> > I think there might be a problem with
> > enhanced mode in Postscript and the
> > overlay/lifting operator ~
> >
> > The following commands produce good
> > results with the enhanced wxt terminal,
> > but not with the enhanced postscript
> > terminal:
> >
> > set label 1 "~a{.7{/*.7\\~}}" at 0,0
> > set label 2 "~a{.7{/*.8=}}" at .5,0
> > set label 3 "~a{.6{/*1-}}" at -.5,0
> > plot [-1:1][-1:1] 2
> >
> > The problem appears to be that the second
> > character is not properly lifted as it should be,
> > when using Postscript.
> >
> > Is this a known issue?
>
> Yes. But it's more fundamental that that.
> Basically you cannot nest curly braces inside the overprint
> operator.  If you remove the nested braces, everything works
> as expected (I think :-).
>
>  set label 1 "~a{.7\\~}" at 0,0
>  set label 2 "~a{.7=}" at .5,0
>  set label 3 "~a{.6-}" at -.5,0
>
> The overprint operator really does not work very well.
> I have a list of problems from various drivers.  If you can,
> it is better to use either the @ operator instead, or in a case
> like your example simply use the extended character set to
> draw the accented character as a single glyph.
>
> For instance, your first label above could be
>
>   set label 1 "@^\\~_a"
> or (much better)
>   set encoding iso_8859_15
>   set label 1 "{\343}"
>
> This all works better in the gd or wxt terminals than in PostScript,
> however.
>
> 	Ethan
>
> > Also, and I am not sure whether I consider
> > this a bug or a feature, when making the
> > overlayed character very large, it affects
> > the absolute position of the first character
> > in the enhanced wxt terminal.
> >
> > (My guess is that gnuplot uses the combined
> > bounding box of both characters to position
> > the entire label. From a user perspective, I
> > would have expected that only the non-lifted
> > character determines the position.)
> >
> >
> >
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