[NTG-context] Bug with macro tightfunction (Metafun)

Hans Hagen pragma at wxs.nl
Mon Feb 16 22:18:01 CET 2015


On 2/16/2015 6:00 PM, Fabrice Couvreur wrote:
> Hi,
> This code generates an error while it was working fine a month ago.
> Best regards,
> Fabrice
>
> \definecolor[mycolor][c=.4,m=0,y=0,k=0]
>
> \starttext
> \start
> \switchtobodyfont[small]
> \startMPcode
>       input hvdm;
>       input tex;
>       l:=3mm; r:=0.6; alfa:=45; beta:=0; gamma:=0;
>       defineDefaultArrow (l, r, alfa, beta, gamma);
>       numeric xmin, xmax, ymin, ymax;
>       xmin := 0; xmax := 110; ymax :=8000 ;ymin:=0; u := 0..1cm; v:=
> 0.002cm;
>       color mycolor; mycolor:=(0.4,0,0);
>       drawoptions(withpen pencircle scaled 0.3pt withcolor
> \MPcolor{mycolor});
>       draw hlingrid(ymin,ymax,1000,16cm,11cm);
>       draw vlingrid(xmin,xmax,10,11cm,16cm);
>       pickup pencircle scaled 1pt ;
>       arrowline ((xmin,0) -- (xmax,0)) scaled u;
>       arrowline ((0,ymin) -- (0,ymax)) scaled v;
>       drawoptions(withpen pencircle scaled 1pt);
>       draw tightfunction ("x", "x*x-84*x+5000", 0, 100, 0.01) xyscaled
> (u,v);
>       for i=0 step 10 until 100:
>           label.bot(TEX("$"&decimal(i)&"$"),(i*u,0));
>       endfor;
>       for i=0 step 1000 until 7000:
>           label.lft(TEX("$"&decimal(i)&"$"),(0,i*v));
>        endfor;
>     label.top("Nombre de lots",(90u,50v));
>     label.lrt(btex $f(x)$ (en euros) etex,(0,7800v));
> \stopMPcode
> \stop
> \stoptext


what is:

      input hvdm;
      input tex;

both names are also candidates for name clashes

Hans

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