Re: Metafun - Metapost capacity exceeded

[Hans Hagen <pragma@wxs.nl>]

Thomas Engel wrote:
> Hello Hans,
>
>
> this is the message I got after running texexec pro_mcc_a3.tex.
> As you can see I have increased the memory size for mp.
> I have attached the two tex-files.
> Maybe there is a mistake in the mp-code. A pdf-file will be produced,
> but if you check the output you will see, that one cubicle is missing!
>   
ok, i stripped down the sample to one image and coul dgenerate a page 

(btw \twodigitMPoutput will make mem usage less but also the quality) 

now, the problem is in the way you define your graphic: 

def Whatever () = 
  save SomePicture ; 
  picture SomePicture ; 
  lots of draws
  SomePicture := currentpicture ;
  SomePicture % return value
end 

here you *never* erase the currentpicture, so graphic keeps accumulating, and each SomePicture has all previous draws

you can see that on the screen: acrobat takes ages to draw the simple graphic and you can also see it from the mp output (a couple of 100K lines). 

solution: 

def Whatever () = 
  save SomePicture ; 
  picture SomePicture ; 
  lots of draws
  SomePicture := currentpicture ;
  currentpicture := nullpicture ; % ADDED
  SomePicture % return value
end 

or just 

def Whatever () = 
  image ( 
  lots of draws
  ) 
end 

So ... 

Hans 

  

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                                          Hans Hagen | PRAGMA ADE
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