[pstricks] specifying angles by direction vectors

[Herbert Voss]

John Frampton wrote:

> Often, in using \nccurve I would like to specify the direction of
> the curve at the endpoints by giving direction vectors, not by
> giving angles.  I have not found a way to do this.  What I plan
> to do is to try to define a new macro \nccurvedirs so that I can
> say things like:
> 
> \nccurvedirs[dirA=(1,1),ncurvA=1.4,dirB=(-2,-1)]{A}{B}
> 
> Two new parameters need to be defined, but that is trivial.

the rest should also be easy, on the first view ...
from pst-node.tex:

\def\nccurve at ii#1#2{\nc at object{Open}{#1}{#2}{.5}{%
   /AngleA \psk at angleA\space def /AngleB \psk at angleB\space def
\tx at NCCurve}}

Herbert


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