source: lemon-tutorial/tools.dox @ 60:202688f8024a

/* -*- mode: C++; indent-tabs-mode: nil; -*-
 *
 * This file is a part of LEMON, a generic C++ optimization library.
 *
 * Copyright (C) 2003-2010
 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 * (Egervary Research Group on Combinatorial Optimization, EGRES).
 *
 * Permission to use, modify and distribute this software is granted
 * provided that this copyright notice appears in all copies. For
 * precise terms see the accompanying LICENSE file.
 *
 * This software is provided "AS IS" with no warranty of any kind,
 * express or implied, and with no claim as to its suitability for any
 * purpose.
 *
 */

namespace lemon {
/**
[PAGE]sec_tools[PAGE] Tools

\todo This page is under construction.

[SEC]sec_aux_structures[SEC] Auxiliary Data Structures
Graph algorithms depend on various auxiliary data structures and algorithms.
For example, heaps play an important role in Dijkstra and Prim
algorithms, both the theoretical and practical performance of them
are determined by the applied heap implementation.

LEMON implements various such auxiliary tools. For instance,
several data structures are available for maintaining \e disjoint \e sets.
\ref UnionFind is the classical union-find data structure, which is
used to implement the \ref Kruskal algorithm.
The \ref UnionFindEnum and \ref HeapUnionFind classes are used in
matching algorithms, the first one supports the enumeration of the
items stored in the sets, while the second one also assigns priorities to the
elements and an item having minimum priority can be retrieved set-wise.


[SEC]sec_graph_to_eps[SEC] Postscript Exporting

Another nice feature of the library is \ref graphToEps(), a highly
configurable graph displaying tool (using EPS output format).
Originally, it was developed to evaluate the flexibility and scalability
of LEMON's approach to implement \ref named-param "named parameters".
Later it has been evolved into a versatile tool featuring above 35 named
parameters. The following code demonstrates its typical use.

\code
  graphToEps(g, "graph.eps")
    .coords(coords)
    .title("Sample EPS figure")
    .copyright("(c) 2003-2010 LEMON Project")
    .absoluteNodeSizes().absoluteArcWidths()
    .nodeScale(2).nodeSizes(sizes)
    .nodeShapes(shapes)
    .nodeColors(composeMap(palette, colors))
    .arcColors(composeMap(palette, acolors))
    .arcWidthScale(.4).arcWidths(widths)
    .nodeTexts(id).nodeTextSize(3)
    .run();
\endcode

Using this feature, various nice images can be generated from graphs,
like this one.

\image html graph_to_eps.png

For more examples, see \ref graph_to_eps_demo.cc in the demo directory
of the LEMON source.


[SEC]sec_time_count[SEC] Time Measuring and Counting

See \ref timecount.


[SEC]sec_random[SEC] Random Number Generation

See \ref Random.


[SEC]sec_arg_parser[SEC] Argument Parser

See \ref ArgParser.

[TRAILER]
*/
}