MetaPost visibly drawing at 0pt

MetaPost visibly drawing at 0pt

[Meer, H. van der]

I used to put an invisible frame around figures in MetaPost by setting a pen scaled at 0pt. That left no trace, but defined the area.
However I (now) see a thin line drawn by code:
 	
	pickup pencircle scaled 0pt;
	draw origin--(w,h);

Did I always mis this or has something changed? For example a roundoff away from zero in MetaPost?
By the way I am typesetting through ConTeXT with \startMPpage … \stopMPpage.

Hans van der Meer

___________________________________________________________________________________
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
___________________________________________________________________________________

Re: MetaPost visibly drawing at 0pt

[Peter Rolf]

Am 19.09.2011 14:31, schrieb Meer, H. van der:
> I used to put an invisible frame around figures in MetaPost by setting a pen scaled at 0pt. That left no trace, but defined the area.
> However I (now) see a thin line drawn by code:
>  	
> 	pickup pencircle scaled 0pt;
> 	draw origin--(w,h);
> 
> Did I always mis this or has something changed? For example a roundoff away from zero in MetaPost?
> By the way I am typesetting through ConTeXT with \startMPpage … \stopMPpage.
>
Donno (as I never used this method). Better use

'setbounds currentpicture to' ..
.. 'unitsquare xyscaled(w,h);'
.. 'OverlayBox;'
.. <whatever is squared>;

at the end of your graphic. This simply sets the bounding box of you
graphic and has no unwanted side effects.

> Hans van der Meer
> 
> ___________________________________________________________________________________
> 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
___________________________________________________________________________________