[Repast-developer] network models

[Nick C. <vze...@ve...>]

Hi,

I've re-written and added some code to the repast parts responsible for
visualizing network models. I'm writing because this changes the
canonical way to write such code. The old system was to wrap nodes in
drawable nodes such that all the network behavior was forward from the
drawable to the wrapped node. This worked okay for simple models, but
caused confusion in more complicated models and made it difficult for
nodes to change their shape. All this was precipitated by comments Skye
made last summer and more particularly trying to help a U. of C. student
with her model. 

The new code works in a similar way, wrapping the drawable in a node.
Drawable behavoir is forwarded from the node to the drawable. The
drawables are bit different here and it is much easier to swap them in
and out, changing the drawing behavior of the node. I've re-written
jiggle to reflect the changes - a bit less code, and much cleaner and
less confusing.

Note that this only changes the canonical way to write such models, the
old way still works fine as long as you can keep it straight.

I'm going to re-write Skye's JinGirModel so that it uses the new
mechanism and can be included as a demo in the next release as an
example of a real network model, something we've needed for a while now.


Nick

-- 
Nick Collier 
Social Science Research Computing
University of Chicago 
http://repast.sourceforge.net