[NTG-context] overlay

John Kitzmiller kitz at inradius.net
Tue Nov 25 01:21:13 CET 2014


>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

Yes it helped Peter, thank you. Interesting moves with the mpost bounding box.

I thought I might need more flexibility—overlays—but it has turned out that single mp graphic with labels for the commentary will work for the task.

Thanks again, John


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