NAME¶
Graph::Writer::VCG - write out directed graph in VCG format
SYNOPSIS¶
use Graph;
use Graph::Writer::VCG;
$graph = Graph->new();
# add edges and nodes to the graph
$writer = Graph::Writer::VCG->new();
$writer->write_graph($graph, 'mygraph.vcg');
DESCRIPTION¶
Graph::Writer::VCG is a class for writing out a directed graph in the
file format used by the
VCG tool, originally developed for Visualising
Compiler Graphs. The graph must be an instance of the Graph class, which is
actually a set of classes developed by Jarkko Hietaniemi.
If you have defined any attributes for the graph, nodes, or edges, they will be
written out to the file, as long as they are attributes understood by VCG.
METHODS¶
new()¶
Constructor - generate a new writer instance.
$writer = Graph::Writer::VCG->new();
This doesn't take any arguments.
write_graph()¶
Write a specific graph to a named file:
$writer->write_graph($graph, $file);
The $file argument can either be a filename, or a filehandle for a previously
opened file.
KNOWN BUGS AND LIMITATIONS¶
- •
- Attributes with non-atomic values aren't currently handled. This includes
the loc, classname, colorentry, and infoname
attributes for graphs, and the loc attribute for nodes,
- •
- Can currently only handle graph, node, and edge
elements and their attributes. So doesn't know about
foldnode_defaults and things like that.
SEE ALSO¶
- http://www.cs.uni-sb.de/RW/users/sander/html/gsvcg1.html
- The home page for VCG.
- Graph
- Jarkko Hietaniemi's modules for representing directed graphs, available
from CPAN under modules/by-module/Graph/
- Algorithms in Perl
- The O'Reilly book which has a chapter on directed graphs, which is based
around Jarkko's modules.
- Graph::Writer
- The base-class for Graph::Writer::VCG
AUTHOR¶
Neil Bowers <neil@bowers.com>
COPYRIGHT¶
Copyright (c) 2001-2012, Neil Bowers. All rights reserved. Copyright (c) 2001,
Canon Research Centre Europe. All rights reserved.
This script is free software; you can redistribute it and/or modify it under the
same terms as Perl itself.