[NTG-context] Fwd: Macro to write a vector (Metafun) is broken

Hans Hagen j.hagen at xs4all.nl
Thu Mar 22 09:54:47 CET 2018


> ---------- Forwarded message ----------
> From: Fabrice Couvreur <fabrice1.couvreur at gmail.com>
> Date: Tue, Mar 20, 2018 at 4:29 PM
> Subject: [NTG-context] Macro to write a vector (Metafun) is broken
> To: mailing list for ConTeXt users <ntg-context at ntg.nl>
> 
> 
> Hello Hans,
> The macro you wrote to draw the arrows of the vectors does not seem to
> work anymore.
> Thank you
> Fabrice

Did you check ou tthe latest meta-imp file? Alan and I added more and 
also changed the interface a little which might have consequences.

> \useMPlibrary[mat]
> 
> % will be in meta-imp-mat.mkiv
> 
> \startMPextensions
>       vardef math_stacker_arrow_shape =
>           image (
>               drawarrow
>                   (OverlayWidth,OverlayOffset) -- (0,OverlayOffset)
>               withcolor
>                   OverlayLineColor ;
>               setbounds currentpicture to boundingbox currentpicture
> bottomenlarged (OverlayOffset/2) topenlarged (OverlayOffset/2) ;
>           )
>       enddef ;
>       vardef math_stacker_leftarrow_shape =
>           math_stacker_arrow_shape
>       enddef ;
>       vardef math_stacker_rightarrow_shape =
>           math_stacker_arrow_shape rotated 180
>       enddef ;
> \stopMPextensions
> 
> \startuniqueMPgraphic{math:stacker:\number"2190}
>       math_stacker_draw(math_stacker_leftarrow_shape) ;
> \stopuniqueMPgraphic
> 
> \startuniqueMPgraphic{math:stacker:\number"2192}
>       math_stacker_draw(math_stacker_rightarrow_shape) ;
> \stopuniqueMPgraphic
> 
> % so far
> 
> \setupmathstackers
>     [both] % vfenced]
>     [color=darkred,
>      alternative=mp]
> 
> \setupmathstackers
>     [top]
>     [color=darkred,
>      alternative=mp]
> 
> \setupmathstackers
>     [bottom]
>     [color=darkred,
>      alternative=mp]
> 
> \starttext
> 
> $\overbracket   {a+b+c+d} \quad \underbracket    {a+b+c+d} \quad
> \doublebracket{a+b+c+d}$ \blank
> $\overparent    {a+b+c+d} \quad \underparent     {a+b+c+d} \quad
> \doubleparent {a+b+c+d}$ \blank
> $\overbrace     {a+b+c+d} \quad \underbrace      {a+b+c+d} \quad
> \doublebrace  {a+b+c+d}$ \blank
> $\overbar       {a+b+c+d} \quad \underbar        {a+b+c+d} \quad
> \doublebar    {a+b+c+d}$ \blank
> 
> $\overleftarrow  {a+b+c+d} \quad \overrightarrow  {a+b+c+d} $ \blank
> $\underleftarrow {a+b+c+d} \quad \underrightarrow {a+b+c+d} $ \blank
> 
> \stoptext
> 
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