Nodes module for commutative diagrams etc

Nodes module for commutative diagrams etc

[Weber, Matthias]

Dear list,

I need to typeset a handful of simple commutative diagrams like the one below, and I found the nodes manual by Alan that has exactly what I want.

But what is the incantation to load the module, or am I missing something else?

Thanks,

Matthias

\starttext 
\startMPcode
path p ; 
p := fullsquare scaled 3cm ;
nodepath = p ;
draw node(0,"\node{$G(X)$}") ;
draw node(1,"\node{$G(Y)$}") ;
draw node(2,"\node{$F(Y)$}") ;
draw node(3,"\node{$F(X)$}") ;
drawarrow fromto.bot(0,0,1, "\nodeSmall{$G(f)$}") ; drawarrow fromto.top(0,3,2, "\nodeSmall{$F(f)$}") ; drawarrow fromto.rt (0,2,1, "\nodeSmall{$η_Y$}") ; drawarrow fromto.lft(0,3,0, "\nodeSmall{$η_X$}") ;
\stopMPcode
\stoptext
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Re: Nodes module for commutative diagrams etc

[Wolfgang Schuster]

Weber, Matthias schrieb am 29.03.2020 um 21:02:
> Dear list,
> 
> I need to typeset a handful of simple commutative diagrams like the one below, and I found the nodes manual by Alan that has exactly what I want.
> 
> But what is the incantation to load the module, or am I missing something else?
> 
> Thanks,
> 
> Matthias
> 
> \starttext
> \startMPcode
> path p ;
> p := fullsquare scaled 3cm ;
> nodepath = p ;
> draw node(0,"\node{$G(X)$}") ;
> draw node(1,"\node{$G(Y)$}") ;
> draw node(2,"\node{$F(Y)$}") ;
> draw node(3,"\node{$F(X)$}") ;
> drawarrow fromto.bot(0,0,1, "\nodeSmall{$G(f)$}") ; drawarrow fromto.top(0,3,2, "\nodeSmall{$F(f)$}") ; drawarrow fromto.rt (0,2,1, "\nodeSmall{$η_Y$}") ; drawarrow fromto.lft(0,3,0, "\nodeSmall{$η_X$}") ;
> \stopMPcode
> \stoptext

The code is loaded by default but you have to change the \nodeSmall 
command to \smallnode, I guess the command name has changed after the 
manual was written.

@Alan: Even after this fix there is something wrong with the module 
because I get no output from the MetaPost graphic while the TeX example 
in the manual works.

Wolfgang
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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
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