Graph::Easy::Layout::Force - Force-based layouter for Graph::Easy

	use Graph::Easy;

	my $graph = Graph::Easy->new();

	$graph->add_edge ('Bonn', 'Berlin');
	$graph->add_edge ('Bonn', 'Ulm');
	$graph->add_edge ('Ulm', 'Berlin');

	$graph->layout( type => 'force' );

	print $graph->as_ascii( );

	# prints:

	#   +------------------------+
	#   |                        v
	# +------+     +-----+     +--------+
	# | Bonn | --> | Ulm | --> | Berlin |
	# +------+     +-----+     +--------+

Graph::Easy::Layout::Force contains routines that calculate a force-based layout for a graph.

Nodes repell each other, while edges connecting them draw them together.

The layouter calculates the forces on each node, then moves them around according to these forces until things have settled down.

Used automatically by Graph::Easy.

Exports nothing.

Graph::Easy.

This module injects the following methods into Graph::Easy:

Calculates the node position with a force-based method.

Copyright (C) 2004 - 2007 by Tels http://bloodgate.com.

See the LICENSE file for information.