* metapost not adding picture
@ 2011-10-09 20:01 Meer, H. van der
2011-10-09 20:35 ` Peter Rolf
0 siblings, 1 reply; 2+ messages in thread
From: Meer, H. van der @ 2011-10-09 20:01 UTC (permalink / raw)
To: NTG ConTeXt
I have this question on the implementation of metapost.
The following program ends in an error:
\startMPpage
picture v;
draw origin--(1cm,1cm);
v = currentpicture;
clearit;
draw (1cm,0)--(0,1cm);
currentpicture := currentpicture + v;
\stopMPpage
The error is: ! Not implemented: (picture)+(picture).
Yet Knuth's metafont book in Chapter 13 tells me, quote: "Pictures can be added or subtracted;"
Is the current metafont implementation lacking this feature? Will it be implemented in the near future?
Hans van der Meer
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* Re: metapost not adding picture
2011-10-09 20:01 metapost not adding picture Meer, H. van der
@ 2011-10-09 20:35 ` Peter Rolf
0 siblings, 0 replies; 2+ messages in thread
From: Peter Rolf @ 2011-10-09 20:35 UTC (permalink / raw)
To: mailing list for ConTeXt users
Am 09.10.2011 22:01, schrieb Meer, H. van der:
> I have this question on the implementation of metapost.
> The following program ends in an error:
>
> \startMPpage
> picture v;
> draw origin--(1cm,1cm);
> v = currentpicture;
> clearit;
> draw (1cm,0)--(0,1cm);
> currentpicture := currentpicture + v;
use
addto currentpicture also v;
> \stopMPpage
>
> The error is: ! Not implemented: (picture)+(picture).
> Yet Knuth's metafont book in Chapter 13 tells me, quote: "Pictures can be added or subtracted;"
> Is the current metafont implementation lacking this feature? Will it be implemented in the near future?
>
Just another notation, that's all.
Best wishes, Peter
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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
___________________________________________________________________________________
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