PPCHTeX: CHAIR-macro not working / new bond type (was: bug fix for ppchtex)

[Tobias Hilbricht <hilbricht@linopus.de>]

Am Di, den 03.08.2004 schrieb Hans Hagen um 12:20:
> Peter Münster wrote:
> 
> >On Tue, 3 Aug 2004, Hans Hagen wrote:
> >Can you confirm, if atom substitution is possible or not in a
> >chair-structure?
> >  
> >
> not sure about that, chairs are kind of special and hard coded, tobias may know since he's the ppchtex expert 

trying to create a poster on carbohydrate chemistry with PPCHTeX I
stumbled across the same problem - it is not possible to place an oxygen
into the chair-structure. What does it mean "hard coded" - is it not
possible to try to get it working by editing ppchtex.tex?

A second question, related to the first: is it possible to define
another bond type in ppchtex.tex - in particular, a hatched wedge like
bond, indicating a bond pointing behind the plane of paper (as opposed
to the already existing SD-bond, a filled wedge like bond pointing in
front out of the paper plane)? I had a look at ppchtex.tex and thought
of starting from 
...
\def\plotchemicaldeltaline#1#2#3#4%
...
But if things are compiled in somewhere ...?

Thanks in advance

Yours sincerely

Tobias Hilbricht