http://nodename.com/blog Fri, 05 Feb 2010 05:06:48 +0000 http://backend.userland.com/rss092 en #theMovie { margin: 0 auto; width: 640px; border-width: 1; border-style : solid ; border-color : black ; } Constrained minimum spanning trees as shape fills, the moving version of my earlier post The Name of the Node. On each frame one point is added, all the points move, and their spanning trees are drawn. Character: JIE2, "knot". (Be ... http://nodename.com/blog/2009/12/14/trees-grow/ A few people have asked for the code for my Voronoi Toy. I haven't made the entire program public yet, but I have released the underlying as3delaunay library, which I originally ported from Steven Fortune's C implementation of his plane-sweep algorithm. In addition to the Voronoi diagram and the Delaunay ... http://nodename.com/blog/2009/12/03/roll-over-delaunay-voronoi-library-goes-open-source/ This is about implementing an enum in AS3 with value restriction ( i.e. the programmer should be unable to diminish or add to the set of values) and type safety. We'll implement the data type as a Class. In order to keep the programmer from adding to the set of ... http://nodename.com/blog/2009/09/05/implementing-enumerated-types-in-actionscript-3/ No, this isn't about some hot new way of using Voronoi diagrams to google myself; I'll leave that challenge to Mario. I was looking over the search terms that had led people to my blog today, and decided to click on "Alan Shaw" Voronoi. Among all the recent stuff, I ... http://nodename.com/blog/2009/08/22/googling-myself-with-voronoi/ Just about every weekend I go to my favorite local restaurant, China Fun, for one of the traditional meals I got accustomed to long ago in Taiwan: 鹹豆漿 xián dòujiāng -- "salty" soybean milk, meaning hot soybean milk with sliced-up 油條 yóutiáo ("oil-stick," i.e. fried cruller), dried baby shrimp, pickled ... http://nodename.com/blog/2009/08/15/the-usual/ In Flash we can HARNESS THE POWER OF BITMAPDATA (as it might be put in a conference session blurb) to grow Voronoi regions under differing conditions, without doing any algebra. Click on the image to launch the Voronoi Generator. Variations on Voronoi Diagrams, from Geometry in Action: One way of ... http://nodename.com/blog/2009/07/01/crystals-evil-rangers-and-voronoi-without-an-engine/ A little code for a change. Sakri was working on this, and I ported a class from Java which I believe he adapted into his final implementation. It's a basic tool for morphing, 3D surface reconstruction, and vectorization. I've cleaned up my version of it and I offer it here. ... http://nodename.com/blog/2009/06/18/marching-squares-boundary-detection/ Click on the image to see 1000 Voronoi points in motion. Keyboard controls as in the Voronoi Toy. If the popup won't go away when you click the X, click in the movie and hit "s" to stop the moving points. I couldn't resist, Frank! http://nodename.com/blog/2009/05/18/mona-voronita/ Jim Armstrong, the Flash community's primary math whiz, has encouraged me in the past, and today he did so publicly. I'm very grateful for this recommendation. Here's the crass part: I'm available for contract or permanent work, locally or remotely. I live in New York City. CV, ... http://nodename.com/blog/2009/05/14/props-from-the-master/ I've rendered some images using the Voronoi Toy from my last post. I've used my logo 結 (as in 結點 "node") as the input image, run Sakri Rosenstrom's image segmentation algorithm on it, dropped 10,000 random points into the segments, and drawn the minimum spanning tree of each set of points, ... http://nodename.com/blog/2009/05/12/the-name-of-the-node/