Re: MetaPost backgrounds

[Mikael Persson <md9per@mdstud.chalmers.se>]

On Sun, 10 Aug 2003 20:50:58 +0200
Jens-Uwe Morawski <morawski@gmx.net> wrote:

> On Sun, 10 Aug 2003 09:30:48 +0200
> Mikael Persson <md9per@mdstud.chalmers.se> wrote:
> 
> > I had some problems with backgrounds in a table. I wanted just a
> > horizontal line, but in different heights. The problem is that the >
> > line will always be in the middle of the cell if I don't add more >
> > > graphics.
> > See the example file below.
> 
> the graphics are always centered in the cell. therefore you have to >
> set the bounding box  of the graphic to the cell size
> 
> > % This works, but is not nice.
> > 
> > \startuniqueMPgraphic{splittop}
> > draw (0,0)--(OverlayWidth,OverlayHeight) withcolor white;%should not
> > be necessary
> > draw (0,0.725*OverlayHeight)--(OverlayWidth,0.725*OverlayHeight);
> > \stopuniqueMPgraphic
> 
> the following should give what you want (untested)
> 
> \startuniqueMPgraphic{splittop}
> draw (0,0.725*OverlayHeight)--(OverlayWidth,0.725*OverlayHeight);
> setbounds currentpicture to (unitsquare xyscaled > >
> (OverlayWidth,OverlayHeight)) ;\stopuniqueMPgraphic
> 
> in order to save some typing you could define a macro
> 
> \startMPinclusions
> def FitToOverlay =
>    setbounds currentpicture to (unitsquare xyscaled > >
>    (OverlayWidth,OverlayHeight)) ;
> enddef;
> \stopMPinclusions
> 
> \startuniqueMPgraphic{splittop}
> draw (0,0.725*OverlayHeight)--(OverlayWidth,0.725*OverlayHeight);
> FitToOverlay ;
> \stopuniqueMPgraphic
> 
> Jens


Jens,

Thanks a lot! I did not know that the graphics are centered in the cell.
Now this mystery (to me) is not a mystery no more :)

Regards, Micke P