Mass rename/move to get rid of Haskell stuff

content/posts/2010-07-04-processing-dla-quadtrees/index.md

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+---
+title: "Processing: DLA, quadtrees"
+date: "2010-07-04"
+author: Chris Hodapp
+tags:
+- processing
+---
+
+I first dabbled with
+[Diffusion-Limited Aggregation](http://en.wikipedia.org/wiki/Diffusion-limited_aggregation)
+algorithms some 5 years back when I read about them in a book (later
+note: that book was
+[Nexus: Small Worlds and the Groundbreaking Theory of Networks](http://www.amazon.com/Nexus-Worlds-Groundbreaking-Science-Networks/dp/0393324427?ie=UTF8&*Version*=1&*entries*=0)). The
+version I wrote was monumentally slow because it was a crappy
+implementation in a slow language for heavy computations
+(i.e. Python), but it worked well enough to create some good results
+like this:
+
+<!--  TODO: Originally:
+[![Don't ask for the source code to this](../images/dla2c.png){width=50%}](../images/dla2c.png)\ 
+-->
+![Diffusion Limited Aggregation](./dla2c.png "Don't ask for the source code to this")
+
+After about 3 or 4 failed attempts to optimize this program to not
+take days to generate images, I finally rewrote it reasonably
+successfully in [Processing](http://processing.org/) which I've taken
+a great liking to recently. I say "reasonably successfully" because it
+still has some bugs and because I can't seem to tune it to produce
+lightning-like images like this one, just much more dense
+ones. Annoyingly, I did not keep any notes about how I made this
+image, so I have only a vague idea. It was from the summer of 2005 in
+which I coded eleventy billion really cool little generative art
+programs, but took very sparse notes about how I made them.
+
+It was only a few hours of coding total. Part of why I like Processing
+is the triviality of adding interactivity to something, which I did
+repeatedly in order to test that the various building-blocks of the
+DLA implementation were working properly.
+
+The actual DLA applet is at
+[http://openprocessing.org/visuals/?visualID=10799](http://openprocessing.org/visuals/?visualID=10799). Click
+around inside it; right-click to reset it. The various building blocks
+that were put together to make this are:
+[here](http://openprocessing.org/visuals/?visualID=10794),
+[here](http://openprocessing.org/visuals/?visualID=10795),
+[here](http://openprocessing.org/visuals/?visualID=10796),
+[here](http://openprocessing.org/visuals/?visualID=10797), and
+[here](http://openprocessing.org/visuals/?visualID=10798).
+
+These are at OpenProcessing mostly because I don't know how to embed a
+Processing applet in Wordpress; perhaps it's better that I don't,
+since this one is a CPU hog.  (*Later note:* I wonder if I can just
+host these examples inline using
+[Processing.js](http://processingjs.org/)...)
+
+This blog also has an entire gallery of generative art with Processing
+that I think is great:
+[http://myecurve.wordpress.com/](http://myecurve.wordpress.com/)