Demos for Delaunay TriangulationBased on original "GBmod" by Andreas Rueger.These examples will familiarize you with themodel builder used in GBmod. The following sequenceof increasingly complicated demos is designed to explain the use of the key parameters and the displayoptions. The contents of this directory are ready-to-run shell scripts that are executed by typing the name of the shell scripton the command line of a UNIX terminal window.Two modes of output are supported. The shell scriptsprefixed by the letters "PS" produce Encapsulated PostScript file output,with the feature that if the user specifies a PostScriptpreviewer, via the environment variable PSPREVIEWER,these files will be displayed on the screen.  The shell scriptsprefixed by the letter "X", produce X-windows output.The models displayed are:# Model 1 - constant sloth (and hence constant wavespeed) medium# Model 2 :  two constant sloth media in contact with a syncline/anticline# Model 3: Simple 4 media model# Model 4:  Cerveny (multi layer model with a lens and fault)# Model 5: Salt dome modelNote: These are triangulated model plots, *not* ray diagrams.Warning: If you get a "BUS error or other Memory error" from amodel you create, check to see that all of the boundaries aredefined correctly. At this time there is minimal error trapping in"trimodel" for such cases.These demos depend on the programs:trimodel, spsplot, and sxplotThe self-documentation (selfdoc) of each of these programs may be obtainedby typing the name of the program (followed by a carriage return)on a UNIX terminal window.If you have questions about these codes please contact:John Stockwell	 | john@dix.Mines.EDUCenter for Wave Phenomena (The Home of Seismic Un*x)Colorado School of MinesGolden, CO 80401 | http://www.cwp.mines.edu/cwpcodesvoice: (303) 273-3049  |    fax: (303) 273-3478.