New subject: Sans Math fonts, for example Computer Modern Bright

14 Dec 2022

      Hello MetaFun Math Lovers,

I am using MetaFun to attach diagrams to formulas. Both the physics and the typesetting are going great! I attached a sample below, to give a taste of what I am trying to do. This page of actual calculations has examples of almost everything I need. It’s a lot, but it is all working. Right now the interface is terrible, but effective. Thanks to Hans and Mikael for many helpful hints!

I am still using \hpos and \setMPpositiongraphic, because I haven't figured out how to pass information from \mathboxanchored and \connectboxanchors to my MetaPost code. Here is the code for the connectors:

\startMPpositiongraphic{mypos:contract}
  path pa, pb, pab ; numeric na, nb ; string ta, tb, hand, product ;
  ta := mpvars("from") ;
  tb := mpvars("to") ;
  stemshiftfrom := (EmWidth/8)*mpvarn("startstem") ;
  stemshiftto   := (EmWidth/8)*mpvarn("stopstem") ;
  hand := mpvars("hand") ;
  product := mpvars("product") ;
  delta := mpvard("distance") ;
  na := positionpage(ta) ; % page number of a
  nb := positionpage(tb) ; % page number of b
  pa := positionbox(ta) ;  % box of a
  pb := positionbox(tb) ;  % box of b
  if hand = "right" :
     z1 = 0.5[llcorner pa,lrcorner pa] shifted (stemshiftfrom, -ExHeight/4) ;
     z2 = 0.5[llcorner pb,lrcorner pb] shifted (stemshiftto,   -ExHeight/4) ;
     y3 = min(y1,y2) - ExHeight/2 -delta; 
  else :
    z1 = 0.5[ulcorner pa,urcorner pa] shifted (stemshiftfrom,  ExHeight/4) ;
    z2 = 0.5[ulcorner pb,urcorner pb] shifted (stemshiftto,    ExHeight/4) ;
    y3 = max(y1,y2) + ExHeight/2 +delta; 
  fi ;
  if na = nb : % Check that positions are on the same page
    pickup pencircle scaled 0.6pt ;
    if product = "sym" :
      draw z1 -- (x1,y3+ExHeight/2) ;
      draw z2 -- (x2,y3+ExHeight/2) ;
      pickup pencircle scaled 1.2pt ;
      draw (x1-EmWidth/8,y3) -- (x2+EmWidth/8,y3) ;
    else :
      pab := z1 -- (x1,y3) -- (x2,y3) -- z2{down} ;
      draw pab ;
    fi ;
    positioninregion ;
  fi ;
\stopMPpositiongraphic

A connector command might look something like this:

\setMPpositiongraphic{X-1}{mypos:contract}{to=X-2,product=sym,startstem=-2,stopstem=2,distance=0.5ex}

All of the key=value pairs in the last argument of \setMPpositiongraphic pop right up in my MetaPost code with mpvar(“key”). I haven’t been able to follow this with \mathboxanchored and \connectboxanchors. My two questions are:

1) Can I use \setMPpositiongraphic with \mathboxanchored? That would allow me to go straight to my MetaPost code without the \connectboxanchors interface

2) Can I tell \connectboxanchors to use my MetaPost code and pass key=value pairs like I do with \setMPpositiongraphic?

Thanks for any hints!
Gavin

Mathematical MetaFun Mania

Gavin

Hans Hagen

Gavin

Hans Hagen

Otared Kavian

Hans Hagen

Hans Hagen

Alexandre Christe

Gavin

Oliver Sieber

Mikael Sundqvist

Hans Hagen

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