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Projects archive / VCG of Eden

Code:vcgWard1999
Title:VCG of Eden
Author:Ashley Ward
Date:Oct-1999
Type:model
Funding:PhD - PhD thesis
Short description:Visualisation of definitive scripts as a graph
EM Technologies:tkeden, %eden
Keywords:tool, geometry
empublic references:roomviewerYung1991, catflapWard1997
EMpress references:
Web site references:http://rw4.cs.uni-sb.de/users/sander/html/gsvcg1.html
Previous locations:~ashley/PhD/Tkeden/Expts/VCG

The xvcg tool by Georg Sander is the "Visualizer of Compiler Graphs". Given a list of nodes and edges, it will display the graph laid out in a number of possible ways, including a fish-eye layout, which compresses the information so that a particular node and its surroundings can be seen clearly, but the nodes that are further away are still present but are smaller.
I had used xvcg before, and was interested to see what a definitive script would look like: would it be neatly organised into sections, assisting my comprehension of the script?
The Eden code in this project uses the Eden symboltable() function to form data suitable for xvcg directly from a running Eden symbol table. It writes the result to a file, and invokes xvcg. (Unfortunately xvcg has now been removed from the DCS system, but it is still available should you wish to experiment further). Different types of symbol are shown in different colours.
Two screenshots from xvcg running on the roomviewerYung1991 model are here, and output ready for xvcg from catflapWard1997 (although I never saved a screenshot from this model) and output from a simple script I wrote for my first year report.
I was generally rather disappointed by the output: there were many more definitions than I initially expected, and they didn't easily organise themselves into something comprehensible.

vcgWard1999 is available locally within DCS at /dcs/emp/empublic/projects/vcgWard1999
Download vcgWard1999.tar.gz
Uncompressed, vcgWard1999 is 455.6 Kbytes (in 9 files).
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README.xml 2027 03:03 PM Aug 20 2002 04:05 PM Dec 15 2014
README.xml~ 2012 06:52 PM Aug 08 2002 04:05 PM Dec 15 2014
catflap.out 199821 03:49 PM Sep 16 1999 04:05 PM Dec 15 2014
genvcg.e 4057 08:33 PM Oct 01 1999 04:05 PM Dec 15 2014
how 1380 09:56 PM Sep 15 1999 04:05 PM Dec 15 2014
roomviewer.gif 46787 12:31 AM Sep 27 1999 04:05 PM Dec 15 2014
roomviewer.out 137543 12:21 AM Sep 27 1999 04:05 PM Dec 15 2014
roomviewer2.gif 58629 12:34 AM Sep 27 1999 04:05 PM Dec 15 2014
simple.out 14281 04:44 PM Oct 01 1999 04:05 PM Dec 15 2014

empublic system initially created by Ashley Ward with assistance from Chris Roe and Meurig Beynon.