Hi folks, I just wrote a little script to demonstrate how easy it is to play with cellular automata in GRASS. It runs both classic and modified versions of the "Game of Life". In addition, the 3D demo mode demonstrates creating a raster 3D time-series block; NVIZ isosurfaces and cutting planes; the xganim map animator; and creating a MPEG-1 movie.
http://grass.gdf-hannover.de/wiki/GRASS_AddOns#Raster_add-ons It's written to be compatible with 6.2.2, but I've only tested it in 6.3cvs. My NVIZ crashes when I try to add a raster volume isosurface (6.2.{1,2} and 6.3cvs; same old vol= bug), so I don't have a fancy screenshot to post, but if that works for you I'd love to see one looking down into the blob version evolution using an isosurface somewhere between 0 and 1. (the "blob" version being mod6, which the 3D mode is hardcoded to use) I came up with the mod4 and mod6 versions mostly by mistake, if anyone wants to contribute others, just send the rules over. (In particular something more blobby than mod6 which would make a nicer isosurface) For those interested in this sort of thing, I see on the add-ons page that Peter Löwe has recently added a r.mandelbrot module as well, and also GRASS's wildfire modules (r.ros/r.spread/r.spreadpath) could use a maintainer from the community. I am very happy to note that there are now many scripts listed on the wiki addons page. In fact, it's busting at the seams. To keep the page useful we should probably do a few things: 1) Break the grass6 raster and vector sections up into subgroups. Any suggestions?? Currently they're just in a random order. 2) As many of the scripts are hosted on authors' personal webspace, it is probably a highly prudent idea to back them up in case that webspace or the author disappear off the scene. Markus's SVN server already hosts some of the modules; I was thinking of some automated wget scraping script to make up a .tgz. (although some links go to personal web pages with the code down another layer, mmph may have to be done by hand periodically). If it helps, I am happy to move all my contributions into the addons SVN. Related: 3) As suggested over on the DebianGIS mailing list (by Frankie??), it would be nice to package all the addons up into a single grass-addons .deb/.rpm container. (well all addons that pass the FOSS license tests anyway). enjoy, Hamish _______________________________________________ grassuser mailing list [email protected] http://grass.itc.it/mailman/listinfo/grassuser
