# ants

Ants demo from clojure-intro talk.
A more modular version of the ants demo adapted to run
on clojure 1.2

Illustrates the refs: the process that draws the UI must find a consistent snapshot of the "ant world". This is actually a
hard problem to do with good concurrency. With STM it is easy,
start a transaction read all refs. Then in your own time, draw
the gui (outside the transaction).

## Usage

I use lein 1.3.0 (http://github.com/technomancy/leiningen)
Swank Clojure 1.3.0-snapshot (http://github.com/technomancy/swank-clojure)
Emacs (AquaMacs for MacOSX) and slime (see Connecting with SLIME on the swank clojure site).

From command prompt:
krukow:~/Projects/clojure/ants$       lein swank
Listening for transport dt_socket at address: 8030
user=> Connection opened on local port  4005
#<ServerSocket ServerSocket[addr=localhost/127.0.0.1,port=0,localport=4005]>

Start up Emacs and run M-x slime-connect (enter-enter-yes)

Open src/ants/ui.clj
Compile C-c C-k

In repl: 
user> (in-ns 'ants.ui)
#<Namespace ants.ui>
ants.ui> (def ants (w/setup))
#'ants.ui/ants
ants.ui> (start-anim)
#<Agent@4a15d117: nil>
ants.ui> (dorun (map #(send-off % b/behave) ants))
nil
ants.ui> (send-off evaporator evaporation)
#<Agent@50e07360: nil>
ants.ui> 


You can interactively change stuff. Try

ants.ui> (def scale 10)
#'ants.ui/scale

to stop:
ants.ui> (in-ns 'ants.behaviour)
#<Namespace ants.behaviour>
ants.behaviour> (def running false)
#'ants.behaviour/running
ants.behaviour> 
(or kill lein swank).

## Installation

FIXME: write

## License

Copyright (C) 2010 FIXME

Distributed under the Eclipse Public License, the same as Clojure.