02-24-2012
"Unix Concepts and Applications" by SUMITABHA DAS
Is a very good book .Easy to understand from basics.
Im also following the same infact
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LEARN ABOUT DEBIAN
graph::easy::layout::path
Graph::Easy::Layout::Path(3pm) User Contributed Perl Documentation Graph::Easy::Layout::Path(3pm)
NAME
Graph::Easy::Layout::Path - Path management for Manhattan-style grids
SYNOPSIS
use Graph::Easy;
my $graph = Graph::Easy->new();
my $bonn = Graph::Easy::Node->new(
name => 'Bonn',
);
my $berlin = Graph::Easy::Node->new(
name => 'Berlin',
);
$graph->add_edge ($bonn, $berlin);
$graph->layout();
print $graph->as_ascii( );
# prints:
# +------+ +--------+
# | Bonn | --> | Berlin |
# +------+ +--------+
DESCRIPTION
"Graph::Easy::Layout::Scout" contains just the actual path-managing code for Graph::Easy, e.g. to create/destroy/maintain paths, node
placement etc.
EXPORT
Exports nothing.
SEE ALSO
Graph::Easy.
METHODS into Graph::Easy
This module injects the following methods into "Graph::Easy":
_path_is_clear()
$graph->_path_is_clear($path);
For all points (x,y pairs) in the path, check that the cell is still free. $path points to a list x,y,type pairs as in "[ [x,y,type],
[x,y,type], ...]".
_create_cell()
my $cell = $graph->($edge,$x,$y,$type);
Create a cell at "$x,$y" coordinates with type $type for the specified edge.
_path_is_clear()
$graph->_path_is_clear();
For all points (x,y pairs) in the path, check that the cell is still free. $path points to a list of "[ x,y,type, x,y,type, ...]".
Returns true when the path is clear, false otherwise.
_trace_path()
my $path = my $graph->_trace_path($src,$dst,$edge);
Find a free way from source node/group to destination node/group for the specified edge. Both source and destination need to be placed
beforehand.
METHODS in Graph::Easy::Node
This module injects the following methods into "Graph::Easy::Node":
_near_places()
my $node->_near_places();
Take a node and return a list of possible placements around it and prune out already occupied cells. $d is the distance from the node
border and defaults to two (for placements). Set it to one for adjacent cells.
_shuffle_dir()
my $dirs = $node->_shuffle_dir( [ 0,1,2,3 ], $dir);
Take a ref to an array with four entries and shuffle them around according to $dir.
_shift()
my $dir = $node->_shift($degrees);
Return a the "flow()" direction shifted by X degrees to $dir.
AUTHOR
Copyright (C) 2004 - 2007 by Tels <http://bloodgate.com>.
See the LICENSE file for information.
perl v5.14.2 2011-12-23 Graph::Easy::Layout::Path(3pm)