Graph::Easy::Layout::Path(3pm)

1Graph::Easy::Layout::PaUtshe(r3)Contributed Perl DocumenGtraatpiho:n:Easy::Layout::Path(3)
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NAME

6       Graph::Easy::Layout::Path - Path management for Manhattan-style grids
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SYNOPSIS

9               use Graph::Easy;
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11               my $graph = Graph::Easy->new();
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13               my $bonn = Graph::Easy::Node->new(
14                       name => 'Bonn',
15               );
16               my $berlin = Graph::Easy::Node->new(
17                       name => 'Berlin',
18               );
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20               $graph->add_edge ($bonn, $berlin);
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22               $graph->layout();
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24               print $graph->as_ascii( );
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26               # prints:
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28               # +------+     +--------+
29               # | Bonn | --> | Berlin |
30               # +------+     +--------+
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DESCRIPTION

33       "Graph::Easy::Layout::Scout" contains just the actual path-managing
34       code for Graph::Easy, e.g. to create/destroy/maintain paths, node
35       placement etc.
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EXPORT

38       Exports nothing.
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METHODS into Graph::Easy

44       This module injects the following methods into "Graph::Easy":
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46   _path_is_clear()
47               $graph->_path_is_clear($path);
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49       For all points (x,y pairs) in the path, check that the cell is still
50       free.  $path points to a list x,y,type pairs as in "[ [x,y,type],
51       [x,y,type], ...]".
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53   _create_cell()
54               my $cell = $graph->($edge,$x,$y,$type);
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56       Create a cell at "$x,$y" coordinates with type $type for the specified
57       edge.
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59   _path_is_clear()
60               $graph->_path_is_clear();
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62       For all points (x,y pairs) in the path, check that the cell is still
63       free.  $path points to a list of "[ x,y,type, x,y,type, ...]".
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65       Returns true when the path is clear, false otherwise.
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67   _trace_path()
68               my $path = my $graph->_trace_path($src,$dst,$edge);
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70       Find a free way from source node/group to destination node/group for
71       the specified edge. Both source and destination need to be placed
72       beforehand.
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METHODS in Graph::Easy::Node

75       This module injects the following methods into "Graph::Easy::Node":
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77   _near_places()
78               my $node->_near_places();
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80       Take a node and return a list of possible placements around it and
81       prune out already occupied cells. $d is the distance from the node
82       border and defaults to two (for placements). Set it to one for adjacent
83       cells.
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85   _shuffle_dir()
86               my $dirs = $node->_shuffle_dir( [ 0,1,2,3 ], $dir);
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88       Take a ref to an array with four entries and shuffle them around
89       according to $dir.
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91   _shift()
92               my $dir = $node->_shift($degrees);
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94       Return a the "flow()" direction shifted by X degrees to $dir.
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AUTHOR

97       Copyright (C) 2004 - 2007 by Tels <http://bloodgate.com>.
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99       See the LICENSE file for information.
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103perl v5.30.1                      2020-01-30      Graph::Easy::Layout::Path(3)