[texhax] trying to add two angles in chemfig, what am I missing lol.

Mike Marchywka marchywka at hotmail.com
Sat Nov 14 15:58:33 CET 2015

I'm trying to modify some chemfig code to make it more flexible and it almost works
except that adding numbers seems to be a mystery. I want to make the angles computed
from a newcommand or similar function, in this case just add 60 degrees,

\newcommand{\frot}[1]{\FPeval{\fgle}{( #1 + 60) }\FPclip\fuu{\fgle}\fuu}

and then use something like this,

               O% 1
     =[:90,0.2]% 25
    -[:150,0.2]% 23
        =_[:90,0.2]% 24
            -[:\frot{150},0.5in + .01\linewidth]% 29

but nothing obvious seems to work. What should this be?
I'd like to accomodate floating point but at this point anything is ok.


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