[NTG-context] Re: Problem with Metapost

[Mikael Sundqvist <mickep@gmail.com>]

Hi,

you get an error of redundant equations. Try

            numeric ymax,xmax ; ymax := 7 ; xmax := 7;
            numeric xmin,ymin ; xmin :=-1 ; ymin := -1;

and it might work.

(It is a bit weird that ymax = 7 several times result in an error, but ... )

/Mikael

On Sun, Nov 3, 2024 at 4:47 PM Fabrice Couvreur
<fabrice1.couvreur@gmail.com> wrote:
>
> Hi,
> I think I have never encountered this problem. Recently, I can no longer have a succession of figures with Metapost; only the first one appears.
> Thanks.
> Fabrice
>
> \starttext
> \dorecurse{3}{\startMPcode
>             numeric u;
>             u = 0.5cm;
>             ymax = xmax = 7;
>             xmin = ymin = -1;
>             interim ahangle := 30;
>             z0 = (1u,1u);
>             z1 = (2u,3u);
>             z2 = (0,5u);
>             path xx, yy;
>             xx = ((xmin,0) -- (xmax,0)) scaled u;
>             yy = ((0,ymin) -- (0,ymax)) scaled u;
>             drawoptions(scaled .5 withcolor .7 white);
>             for i = ceiling ymin upto floor ymax: draw xx shifted (0,i*u); endfor
>             for i = ceiling xmin upto floor xmax: draw yy shifted (i*u,0); endfor
>             drawoptions();
>             path fuzz;
>             fuzz = z0 -- z1 -- z2 -- cycle;
>             fill fuzz withcolor 0.7[blue,white];
>             draw fuzz withcolor blue;
>             fill fuzz shifted(4u,1u) withcolor 0.7[blue,white];
>             draw fuzz shifted(4u,1u) withcolor blue;
>             drawoptions(withpen pencircle scaled 1pt);
>             drawarrow z0 -- z0 shifted (4u,1u);
>             drawarrow z1 -- z1 shifted (4u,1u);
>             drawarrow z2 -- z2 shifted (4u,1u);
>             drawoptions();
>             label("\im{\vec{v}}", (3.5u,3u));
>             label.llft("\im{A}",z0);
>             label.lrt("\im{B}",z0 shifted (4u,1u));
>
>           \stopMPcode}
>
>
> \stoptext
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