Thanks!! For the hints to existing examples as well as for the
very instructive advice to clip to the enlarged unitsquare.

2010/6/7 Hongwen Qiu <qiuhongwen@gmail.com>

>  于 2010年06月07日 22:47, Erik Margraf 写道:
>
> Hi all,
> I'd like to achieve in context something like I did in
> the attachment (context.pdf). My idea was (and
> that's the way how I did this in Inkscape):
>
>    - Create Text
>    - Double the text
>    - Clip one for the upper half, clip the other for the lower half
>
> Actually, you only have to clip one, either the upper half or the lower
> half, since the latter elements added onto the canvas will mask the former
> elements.
>
>    - Connect the two halves.
>
> My (probably naive) approach to clipping text in context was:
>
> -----
> \starttext
> \startuniqueMPgraphic{context}
>   draw btex \bf Context etex xyscaled (4.0, 4.0) withcolor .8white ;
>   clip currentpicture to unitsquare;
>
> take something like:
> clip currentpicture to unitsquare scaled 8cm;
> and you'll know what's the problem.
>
> \stopuniqueMPgraphic
> \null\dontcomplain
> \uniqueMPgraphic{context}
> -----
>
> (Without the "clip" - line, the string "Context" is displayed. With
> clipping, nothing is displayed.)
>
> Any hint in the right direction towards clipping or maybe a better
> way to achieve this is appreciated.
>
> Thanks
>
> Erik
>
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
>
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
> archive  : http://foundry.supelec.fr/projects/contextrev/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________
>
>
>
>
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to
> the Wiki!
>
> maillist : ntg-context@ntg.nl /
> http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
> archive  : http://foundry.supelec.fr/projects/contextrev/
> wiki     : http://contextgarden.net
>
> ___________________________________________________________________________________
>
>