Re: [NTG-context] metafun "boxes"

2 Mar 2006

      <--- On Mar 2, Renaud AUBIN wrote --->
...
Hi all,
Yesterday, I have tried to put "\input boxes" within a MPgraphic. As a
result, I obtain errors at compilation. After discussing this issue with
Taco on #context, it appears that boxes.mp and metafun interaction is
not safe at all.
Shouldn't  that be input boxes; in a MPinclusions?
...
X. others solutions I don't know yet... (feel free to add yours !)
Have a look at metaobj.
...
My thought is to finally obtain in metafun:
1. Nodes with text (multiline text!)
Place inside a framed
...
and a collection of "simple" shapes to use like box, circle, box 
with rounded corner...
Metaobj provides all basic shapes
...
2. Nodes must be placed freely accroding to the metapost coordinate 
system
Metaobj provides a better interface to placement. You can specify the 
distance and alignment between the nodes.
...
3. Connections between nodes (using boundaries of each nodes +
possibility to give angles from...to for each connections)
Has all of that
...
See http://renolab.lrv.uvsq.fr/perso/ConTeXt/sample.png to have an idea
See the example below. metaobj has some bugs and limitations, but 
works as expected most of the time.

\starttext

\startMPenvironment
   \setupbodyfont[8pt]
   \setupframed[width=3cm, align=center, frame=off]
\stopMPenvironment

\startMPinclusions
   input metaobj;
   setObjectDefaultOption("Ellipse")("fit")(false)
   setCurveDefaultOption("arcangleA",15);
   setCurveDefaultOption("arcangleB",15);
\stopMPinclusions

\startMPpage
   % Metaobj provides a Circle command. But there seems to be
   % a bug in the interaction of Circle and Matix. So using Ellipse with
   % fit=false
   newEllipse.N1(btex \framed{Mise Sous Tension} etex) ;
   newEllipse.N2(btex \framed{Mesure du point zéro méchaique} etex) ;
   newEllipse.N3(btex \framed{Régalage des paramèters de contrôle} etex) ;
   newEllipse.N4(btex \framed{Envoi du contenu de l'\cap{EEPROM}} etex) ;
   newEllipse.N5(btex \framed{{\bf Mode stop|/| réglage}
                 Attente de commande} etex) ;
   newEllipse.N6(btex \framed{\bf Mode freins libres} etex) ;
   newEllipse.N7(btex \framed{Le contenu de l'\cap{EEPROM} a changé} etex) ;
   newEllipse.N8(btex \framed{Ëcriture du contenu de la
                 \cap{RAM} vers l'\cap{EEPROM}} etex);
   newEllipse.N9(btex \framed{{\bf Mode  Contrôle} La valeur
                 de la commande est rafraîchie à chaque cycle} etex) ;

   newMatrix.diagram(3,3)(N1,N2,N3,N4,N5,N6,N7,N8,N9)
                     "hsep(1.5cm)", "vsep(1.5cm)";
   diagram.c = origin ;
   drawObj(diagram) ;
   ncline(N1)(N5) ;
   for i = 2,3,4,6,7,8,9:
     ncarc(N[i])(N[5]) ;
     ncarc(N[5])(N[i]) ;
   endfor
   nccircle(N6) "angleA(-120)" ;
   nccircle(N9) "angleA(-120)" ;

   % Labels can be added. See metaobj manual

\stopMPpage

\stoptext

-- 
Aditya Mahajan, EECS Systems, University of Michigan
http://www.eecs.umich.edu/~adityam || Ph: 7342624008