ppchtex, color and mkiv

ppchtex, color and mkiv

[Jörg Hagmann]

 From a thread on this list (May 2009: 
http://archive.contextgarden.net/message/20090512.132914.5c29b5f4.en.html) 
I gather that whereas colouring a whole molecule works fine, colouring 
groups within a chemical structure is not yet fully implemented in mkiv. 
  Is that still correct?

Putting colour on atoms works with {\blue C} etc. or "\defineprocessor 
... etc. chemred->C" etc.. However, I couldn't find a way to colour the 
bonds belonging to the group. Is there one?

ppchTEX does a superb job and I hope that the most useful features will 
be implemented in the near future in mkiv!

Jörg
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Re: ppchtex, color and mkiv

[Alan BRASLAU]

On Friday 19 November 2010 09:52:47 Jörg Hagmann wrote:
>  From a thread on this list (May 2009:
> http://archive.contextgarden.net/message/20090512.132914.5c29b5f4.en.html)
> I gather that whereas colouring a whole molecule works fine, colouring
> groups within a chemical structure is not yet fully implemented in mkiv.
>   Is that still correct?
> 
> Putting colour on atoms works with {\blue C} etc. or "\defineprocessor
> ... etc. chemred->C" etc.. However, I couldn't find a way to colour the
> bonds belonging to the group. Is there one?

The only way that I managed to do this is to draw the chemical twice and to 
use overlays (or to trick the bounding box using left=,right=,top=,bottom=). 
It would be nice to be able to draw colored bonds, perhaps with the syntax:
\chemical[SIX,rulecolor=blue,SB1,rulecolor=black,SB2..6][]

The problem is that we usually don't mix single tokens with token=val.
(but Hans has broken this rule with an experimental feature: Z1=C, currently 
broken as it converts C to lowercase...)

For now, rulecolor= can only be specified in \startchemical or \setupchemical.

Maybe we can discuss this with Hans off-list?

Alan
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