[pstricks] Adder for pst-circ

Joel Salomon joelcsalomon at gmail.com
Sun Dec 3 21:47:40 CET 2006

I'm trying to create a control-systems simulation diagram, for which
I'm trying to define an adder.  A simple version of what I want to
create looks like:
Options this needs include the presence or absence of either or both
of the top and bottom nodes, and a +, -, or blank in any quadrant and,
by default, arrows pointing to quadrants that have a + or -.  This can
be a dipole, tripole, or quadrupole depending on how it's invoked.

I'd be glad to do the programming if someone tells me it can be done
and points me to a model.


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