Am 22.11.2014 um 21:32 schrieb John Kitzmiller:
> Given rectangles with text:
>
> \starttext
> Before:\\
> \startMPcode
> draw unitsquare xscaled 2cm yscaled 1cm;
> \stopMPcode
> \\
> After:\\
> \startMPcode
> for i=0 upto 1:
> draw unitsquare scaled 1cm xshifted i*cm;
> endfor;
> \stopMPcode
> \stoptext
>
>
> How can a line be drawn connecting the right edges of the rectangles? I
> have played with:
>
> \startuniqueMPgraphic{line}
> path a;
> a:=(0,0)--(0,3cm);
> draw a withpen pencircle scaled 3pt withcolor green;
> \stopuniqueMPgraphic
>
> \defineoverlay[line][{\uniqueMPgraphic{line}}]
>
>
> and using it in \framed, but placing the line correctly is elusive.
>
>
Just a quick and dirty solution. The trick is to draw the extra line as
part of the graphic and then fake the boundingbox. This is also limited
to a few centimeter, objects are cut off after you reach that
'invisible' border around the boundingbox.
I would use uniqueMPgraphic with proper parameters for the graphics.
Using overlays is also possible (urcorner OverlayBox), but I see no real
need or benefit to do so.
HTH, Peter
\startMPinclusions
numeric lw; lw:= 1;
numeric n; n:= 8;
numeric u; u:= 1cm;
\stopMPinclusions
\starttext
Before:\\
\startMPcode
pickup pencircle scaled lw;
draw unitsquare xyscaled (n*u,u);
\stopMPcode
\\
After:\\
\startMPcode
path p,q;
pickup pencircle scaled lw;
p:= unitsquare scaled u;
for i=0 upto n-1:
draw p xshifted i*u;
endfor;
q:= boundingbox currentpicture;
draw (urcorner(q) shifted(-.5lw,-.5lw)) -- (urcorner(q) shifted(-.5lw,-.5lw +1.5u));
setbounds currentpicture to q;
\stopMPcode
\stoptext
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