demo/graph_to_eps_demo.cc
author Peter Kovacs <kpeter@inf.elte.hu>
Fri, 03 Apr 2009 18:59:15 +0200
changeset 608 6ac5d9ae1d3d
parent 313 64f8f7cc6168
child 612 0c8e5c688440
permissions -rw-r--r--
Support real types + numerical stability fix in NS (#254)

- Real types are supported by appropriate inicialization.
- A feature of the XTI spanning tree structure is removed to ensure
numerical stability (could cause problems using integer types).
The node potentials are updated always on the lower subtree,
in order to prevent overflow problems.
The former method isn't notably faster during to our tests.
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/* -*- mode: C++; indent-tabs-mode: nil; -*-
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 *
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 * This file is a part of LEMON, a generic C++ optimization library.
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 *
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 * Copyright (C) 2003-2009
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 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
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 * (Egervary Research Group on Combinatorial Optimization, EGRES).
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 *
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 * Permission to use, modify and distribute this software is granted
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 * provided that this copyright notice appears in all copies. For
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 * precise terms see the accompanying LICENSE file.
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 *
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 * This software is provided "AS IS" with no warranty of any kind,
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 * express or implied, and with no claim as to its suitability for any
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 * purpose.
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 *
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 */
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/// \ingroup demos
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/// \file
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/// \brief Demo of the graph drawing function \ref graphToEps()
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///
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/// This demo program shows examples how to use the function \ref
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/// graphToEps(). It takes no input but simply creates seven
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/// <tt>.eps</tt> files demonstrating the capability of \ref
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/// graphToEps(), and showing how to draw directed graphs,
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/// how to handle parallel egdes, how to change the properties (like
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/// color, shape, size, title etc.) of nodes and arcs individually
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/// using appropriate graph maps.
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///
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/// \include graph_to_eps_demo.cc
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#include<lemon/list_graph.h>
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#include<lemon/graph_to_eps.h>
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#include<lemon/math.h>
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using namespace std;
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using namespace lemon;
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int main()
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{
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  Palette palette;
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  Palette paletteW(true);
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  // Create a small digraph
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  ListDigraph g;
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  typedef ListDigraph::Node Node;
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  typedef ListDigraph::NodeIt NodeIt;
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  typedef ListDigraph::Arc Arc;
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  typedef dim2::Point<int> Point;
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  Node n1=g.addNode();
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  Node n2=g.addNode();
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  Node n3=g.addNode();
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  Node n4=g.addNode();
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  Node n5=g.addNode();
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  ListDigraph::NodeMap<Point> coords(g);
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  ListDigraph::NodeMap<double> sizes(g);
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  ListDigraph::NodeMap<int> colors(g);
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  ListDigraph::NodeMap<int> shapes(g);
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  ListDigraph::ArcMap<int> acolors(g);
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  ListDigraph::ArcMap<int> widths(g);
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  coords[n1]=Point(50,50);  sizes[n1]=1; colors[n1]=1; shapes[n1]=0;
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  coords[n2]=Point(50,70);  sizes[n2]=2; colors[n2]=2; shapes[n2]=2;
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  coords[n3]=Point(70,70);  sizes[n3]=1; colors[n3]=3; shapes[n3]=0;
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  coords[n4]=Point(70,50);  sizes[n4]=2; colors[n4]=4; shapes[n4]=1;
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  coords[n5]=Point(85,60);  sizes[n5]=3; colors[n5]=5; shapes[n5]=2;
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  Arc a;
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  a=g.addArc(n1,n2); acolors[a]=0; widths[a]=1;
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  a=g.addArc(n2,n3); acolors[a]=0; widths[a]=1;
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  a=g.addArc(n3,n5); acolors[a]=0; widths[a]=3;
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  a=g.addArc(n5,n4); acolors[a]=0; widths[a]=1;
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  a=g.addArc(n4,n1); acolors[a]=0; widths[a]=1;
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  a=g.addArc(n2,n4); acolors[a]=1; widths[a]=2;
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  a=g.addArc(n3,n4); acolors[a]=2; widths[a]=1;
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  IdMap<ListDigraph,Node> id(g);
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  // Create .eps files showing the digraph with different options
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  cout << "Create 'graph_to_eps_demo_out_1_pure.eps'" << endl;
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  graphToEps(g,"graph_to_eps_demo_out_1_pure.eps").
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    coords(coords).
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    title("Sample .eps figure").
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    copyright("(C) 2003-2009 LEMON Project").
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    run();
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  cout << "Create 'graph_to_eps_demo_out_2.eps'" << endl;
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  graphToEps(g,"graph_to_eps_demo_out_2.eps").
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    coords(coords).
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    title("Sample .eps figure").
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    copyright("(C) 2003-2009 LEMON Project").
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    absoluteNodeSizes().absoluteArcWidths().
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    nodeScale(2).nodeSizes(sizes).
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    nodeShapes(shapes).
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    nodeColors(composeMap(palette,colors)).
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    arcColors(composeMap(palette,acolors)).
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    arcWidthScale(.4).arcWidths(widths).
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    nodeTexts(id).nodeTextSize(3).
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    run();
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  cout << "Create 'graph_to_eps_demo_out_3_arr.eps'" << endl;
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  graphToEps(g,"graph_to_eps_demo_out_3_arr.eps").
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    title("Sample .eps figure (with arrowheads)").
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    copyright("(C) 2003-2009 LEMON Project").
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    absoluteNodeSizes().absoluteArcWidths().
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    nodeColors(composeMap(palette,colors)).
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    coords(coords).
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    nodeScale(2).nodeSizes(sizes).
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    nodeShapes(shapes).
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    arcColors(composeMap(palette,acolors)).
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    arcWidthScale(.4).arcWidths(widths).
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    nodeTexts(id).nodeTextSize(3).
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    drawArrows().arrowWidth(2).arrowLength(2).
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    run();
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  // Add more arcs to the digraph
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  a=g.addArc(n1,n4); acolors[a]=2; widths[a]=1;
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  a=g.addArc(n4,n1); acolors[a]=1; widths[a]=2;
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  a=g.addArc(n1,n2); acolors[a]=1; widths[a]=1;
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  a=g.addArc(n1,n2); acolors[a]=2; widths[a]=1;
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  a=g.addArc(n1,n2); acolors[a]=3; widths[a]=1;
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  a=g.addArc(n1,n2); acolors[a]=4; widths[a]=1;
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  a=g.addArc(n1,n2); acolors[a]=5; widths[a]=1;
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  a=g.addArc(n1,n2); acolors[a]=6; widths[a]=1;
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  a=g.addArc(n1,n2); acolors[a]=7; widths[a]=1;
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  cout << "Create 'graph_to_eps_demo_out_4_par.eps'" << endl;
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  graphToEps(g,"graph_to_eps_demo_out_4_par.eps").
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    title("Sample .eps figure (parallel arcs)").
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    copyright("(C) 2003-2009 LEMON Project").
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    absoluteNodeSizes().absoluteArcWidths().
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    nodeShapes(shapes).
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    coords(coords).
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    nodeScale(2).nodeSizes(sizes).
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    nodeColors(composeMap(palette,colors)).
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    arcColors(composeMap(palette,acolors)).
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    arcWidthScale(.4).arcWidths(widths).
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    nodeTexts(id).nodeTextSize(3).
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    enableParallel().parArcDist(1.5).
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    run();
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  cout << "Create 'graph_to_eps_demo_out_5_par_arr.eps'" << endl;
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  graphToEps(g,"graph_to_eps_demo_out_5_par_arr.eps").
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    title("Sample .eps figure (parallel arcs and arrowheads)").
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    copyright("(C) 2003-2009 LEMON Project").
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    absoluteNodeSizes().absoluteArcWidths().
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    nodeScale(2).nodeSizes(sizes).
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    coords(coords).
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    nodeShapes(shapes).
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    nodeColors(composeMap(palette,colors)).
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    arcColors(composeMap(palette,acolors)).
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    arcWidthScale(.3).arcWidths(widths).
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    nodeTexts(id).nodeTextSize(3).
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    enableParallel().parArcDist(1).
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    drawArrows().arrowWidth(1).arrowLength(1).
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    run();
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  cout << "Create 'graph_to_eps_demo_out_6_par_arr_a4.eps'" << endl;
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  graphToEps(g,"graph_to_eps_demo_out_6_par_arr_a4.eps").
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    title("Sample .eps figure (fits to A4)").
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    copyright("(C) 2003-2009 LEMON Project").
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    scaleToA4().
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    absoluteNodeSizes().absoluteArcWidths().
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    nodeScale(2).nodeSizes(sizes).
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    coords(coords).
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    nodeShapes(shapes).
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    nodeColors(composeMap(palette,colors)).
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    arcColors(composeMap(palette,acolors)).
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    arcWidthScale(.3).arcWidths(widths).
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    nodeTexts(id).nodeTextSize(3).
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    enableParallel().parArcDist(1).
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    drawArrows().arrowWidth(1).arrowLength(1).
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    run();
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  // Create an .eps file showing the colors of a default Palette
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  ListDigraph h;
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  ListDigraph::NodeMap<int> hcolors(h);
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  ListDigraph::NodeMap<Point> hcoords(h);
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  int cols=int(sqrt(double(palette.size())));
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  for(int i=0;i<int(paletteW.size());i++) {
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    Node n=h.addNode();
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    hcoords[n]=Point(1+i%cols,1+i/cols);
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    hcolors[n]=i;
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  }
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  cout << "Create 'graph_to_eps_demo_out_7_colors.eps'" << endl;
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  graphToEps(h,"graph_to_eps_demo_out_7_colors.eps").
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    scale(60).
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    title("Sample .eps figure (Palette demo)").
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    copyright("(C) 2003-2009 LEMON Project").
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    coords(hcoords).
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    absoluteNodeSizes().absoluteArcWidths().
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    nodeScale(.45).
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    distantColorNodeTexts().
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    nodeTexts(hcolors).nodeTextSize(.6).
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    nodeColors(composeMap(paletteW,hcolors)).
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    run();
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  return 0;
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}