# HG changeset patch
# User Alpar Juttner <alpar@cs.elte.hu>
# Date 2008-04-03 12:10:49
# Node ID 7cd965d2257f5eeda2862677d84520cd6d864c97
# Parent  7b44eea654d0ae8a9fe5be301d1bf74ef7edb56e

Port graph_to_eps() and Color from svn -r3482.

diff --git a/.hgignore b/.hgignore
--- a/.hgignore
+++ b/.hgignore
@@ -24,6 +24,7 @@
 .dirstamp
 .libs/*
 .deps/*
+demo/*.eps
 
 syntax: regexp
 (.*/)?\#[^/]*\#$
diff --git a/demo/Makefile.am b/demo/Makefile.am
--- a/demo/Makefile.am
+++ b/demo/Makefile.am
@@ -4,9 +4,12 @@
 if WANT_DEMO
 
 noinst_PROGRAMS += \
-        demo/arg_parser_demo
+        demo/arg_parser_demo \
+        demo/graph_to_eps_demo
 
 endif WANT_DEMO
 
 demo_arg_parser_demo_SOURCES = demo/arg_parser_demo.cc
 
+demo_graph_to_eps_demo_SOURCES = demo/graph_to_eps_demo.cc
+
diff --git a/demo/arg_parser_demo.cc b/demo/arg_parser_demo.cc
--- a/demo/arg_parser_demo.cc
+++ b/demo/arg_parser_demo.cc
@@ -37,6 +37,7 @@
   bool g1,g2,g3;
   ap.refOption("n", "An integer input.", i, true)
     .refOption("val", "A double input.", d)
+    .doubleOption("val2", "A double input.", d)
     .synonym("vals","val")
     .refOption("name", "A string input.", s)
     .refOption("f", "A switch.", b)
@@ -45,7 +46,7 @@
     .refOption("grb","Choice B",g2)
     .refOption("grc","Choice C",g3)
     .optionGroup("gr","gra")
-    .optionGroup("gr","grb")
+    .optionGroup("gr","grbkk")
     .optionGroup("gr","grc")
     .mandatoryGroup("gr")
     .onlyOneGroup("gr")
diff --git a/demo/graph_to_eps_demo.cc b/demo/graph_to_eps_demo.cc
new file mode 100644
--- /dev/null
+++ b/demo/graph_to_eps_demo.cc
@@ -0,0 +1,208 @@
+/* -*- C++ -*-
+ *
+ * This file is a part of LEMON, a generic C++ optimization library
+ *
+ * Copyright (C) 2003-2008
+ * 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.
+ *
+ */
+
+/// \ingroup demos
+/// \file
+/// \brief Demo of the graph grawing function \ref graphToEps()
+///
+/// This demo program shows examples how to  use the function \ref
+/// graphToEps(). It takes no input but simply creates  six
+/// <tt>.eps</tt> files demonstrating the capability of \ref
+/// graphToEps(), and showing how to draw directed/graphs,
+/// how to handle parallel egdes, how to change the properties (like
+/// color, shape, size, title etc.) of nodes and arcs individually
+/// using appropriate \ref maps-page "graph maps".
+///
+/// \include graph_to_eps_demo.cc
+
+#include <lemon/math.h>
+
+#include<lemon/graph_to_eps.h>
+#include<lemon/list_graph.h>
+#include<lemon/graph_utils.h>
+
+using namespace std;
+using namespace lemon;
+
+int main()
+{
+  Palette palette;
+  Palette paletteW(-1,true);
+
+  ListDigraph g;
+  typedef ListDigraph::Node Node;
+  typedef ListDigraph::NodeIt NodeIt;
+  typedef ListDigraph::Arc Arc;
+  typedef dim2::Point<int> Point;
+  
+  Node n1=g.addNode();
+  Node n2=g.addNode();
+  Node n3=g.addNode();
+  Node n4=g.addNode();
+  Node n5=g.addNode();
+
+  ListDigraph::NodeMap<Point> coords(g);
+  ListDigraph::NodeMap<double> sizes(g);
+  ListDigraph::NodeMap<int> colors(g);
+  ListDigraph::NodeMap<int> shapes(g);
+  ListDigraph::ArcMap<int> ecolors(g);
+  ListDigraph::ArcMap<int> widths(g);
+  
+  coords[n1]=Point(50,50);  sizes[n1]=1; colors[n1]=1; shapes[n1]=0;
+  coords[n2]=Point(50,70);  sizes[n2]=2; colors[n2]=2; shapes[n2]=2;
+  coords[n3]=Point(70,70);  sizes[n3]=1; colors[n3]=3; shapes[n3]=0;
+  coords[n4]=Point(70,50);  sizes[n4]=2; colors[n4]=4; shapes[n4]=1;
+  coords[n5]=Point(85,60);  sizes[n5]=3; colors[n5]=5; shapes[n5]=2;
+  
+  Arc e;
+
+  e=g.addArc(n1,n2); ecolors[e]=0; widths[e]=1;
+  e=g.addArc(n2,n3); ecolors[e]=0; widths[e]=1;
+  e=g.addArc(n3,n5); ecolors[e]=0; widths[e]=3;
+  e=g.addArc(n5,n4); ecolors[e]=0; widths[e]=1;
+  e=g.addArc(n4,n1); ecolors[e]=0; widths[e]=1;
+  e=g.addArc(n2,n4); ecolors[e]=1; widths[e]=2;
+  e=g.addArc(n3,n4); ecolors[e]=2; widths[e]=1;
+  
+  IdMap<ListDigraph,Node> id(g);
+
+  cout << "Create 'graph_to_eps_demo_out_pure.eps'" << endl;
+  graphToEps(g,"graph_to_eps_demo_out_pure.eps").
+    //scale(10).
+    coords(coords).
+    title("Sample .eps figure").
+    copyright("(C) 2003-2007 LEMON Project").
+    run();
+
+  cout << "Create 'graph_to_eps_demo_out.eps'" << endl;
+  graphToEps(g,"graph_to_eps_demo_out.eps").
+    //scale(10).
+    coords(coords).
+    title("Sample .eps figure").
+    copyright("(C) 2003-2007 LEMON Project").
+    absoluteNodeSizes().absoluteArcWidths().
+    nodeScale(2).nodeSizes(sizes).
+    nodeShapes(shapes).
+    nodeColors(composeMap(palette,colors)).
+    arcColors(composeMap(palette,ecolors)).
+    arcWidthScale(.4).arcWidths(widths).
+    nodeTexts(id).nodeTextSize(3).
+    run();
+
+
+  cout << "Create 'graph_to_eps_demo_out_arr.eps'" << endl;
+  graphToEps(g,"graph_to_eps_demo_out_arr.eps").
+    //scale(10).
+    title("Sample .eps figure (with arrowheads)").
+    copyright("(C) 2003-2007 LEMON Project").
+    absoluteNodeSizes().absoluteArcWidths().
+    nodeColors(composeMap(palette,colors)).
+    coords(coords).
+    nodeScale(2).nodeSizes(sizes).
+    nodeShapes(shapes).
+    arcColors(composeMap(palette,ecolors)).
+    arcWidthScale(.4).arcWidths(widths).
+    nodeTexts(id).nodeTextSize(3).
+    drawArrows().arrowWidth(1).arrowLength(1).
+    run();
+
+  e=g.addArc(n1,n4); ecolors[e]=2; widths[e]=1;
+  e=g.addArc(n4,n1); ecolors[e]=1; widths[e]=2;
+
+  e=g.addArc(n1,n2); ecolors[e]=1; widths[e]=1;
+  e=g.addArc(n1,n2); ecolors[e]=2; widths[e]=1;
+  e=g.addArc(n1,n2); ecolors[e]=3; widths[e]=1;
+  e=g.addArc(n1,n2); ecolors[e]=4; widths[e]=1;
+  e=g.addArc(n1,n2); ecolors[e]=5; widths[e]=1;
+  e=g.addArc(n1,n2); ecolors[e]=6; widths[e]=1;
+  e=g.addArc(n1,n2); ecolors[e]=7; widths[e]=1;
+
+  cout << "Create 'graph_to_eps_demo_out_par.eps'" << endl;
+  graphToEps(g,"graph_to_eps_demo_out_par.eps").
+    //scale(10).
+    title("Sample .eps figure (parallel arcs)").
+    copyright("(C) 2003-2007 LEMON Project").
+    absoluteNodeSizes().absoluteArcWidths().
+    nodeShapes(shapes).
+    coords(coords).
+    nodeScale(2).nodeSizes(sizes).
+    nodeColors(composeMap(palette,colors)).
+    arcColors(composeMap(palette,ecolors)).
+    arcWidthScale(.4).arcWidths(widths).
+    nodeTexts(id).nodeTextSize(3).
+    enableParallel().parArcDist(1.5).
+    run();
+  
+  cout << "Create 'graph_to_eps_demo_out_par_arr.eps'" << endl;
+  graphToEps(g,"graph_to_eps_demo_out_par_arr.eps").
+    //scale(10).
+    title("Sample .eps figure (parallel arcs and arrowheads)").
+    copyright("(C) 2003-2007 LEMON Project").
+    absoluteNodeSizes().absoluteArcWidths().
+    nodeScale(2).nodeSizes(sizes).
+    coords(coords).
+    nodeShapes(shapes).
+    nodeColors(composeMap(palette,colors)).
+    arcColors(composeMap(palette,ecolors)).
+    arcWidthScale(.3).arcWidths(widths).
+    nodeTexts(id).nodeTextSize(3).
+    enableParallel().parArcDist(1).
+    drawArrows().arrowWidth(1).arrowLength(1).
+    run();
+
+  cout << "Create 'graph_to_eps_demo_out_a4.eps'" << endl;
+  graphToEps(g,"graph_to_eps_demo_out_a4.eps").scaleToA4().
+    title("Sample .eps figure (fits to A4)").
+    copyright("(C) 2003-2007 LEMON Project").
+    absoluteNodeSizes().absoluteArcWidths().
+    nodeScale(2).nodeSizes(sizes).
+    coords(coords).
+    nodeShapes(shapes).
+    nodeColors(composeMap(palette,colors)).
+    arcColors(composeMap(palette,ecolors)).
+    arcWidthScale(.3).arcWidths(widths).
+    nodeTexts(id).nodeTextSize(3).
+    enableParallel().parArcDist(1).
+    drawArrows().arrowWidth(1).arrowLength(1).
+    run();
+
+  ListDigraph h;
+  ListDigraph::NodeMap<int> hcolors(h);
+  ListDigraph::NodeMap<Point> hcoords(h);
+  
+  int cols=int(sqrt(double(palette.size())));
+  for(int i=0;i<int(paletteW.size());i++) {
+    Node n=h.addNode();
+    hcoords[n]=Point(i%cols,i/cols);
+    hcolors[n]=i;
+  }
+  
+  cout << "Create 'graph_to_eps_demo_out_colors.eps'" << endl;
+  graphToEps(h,"graph_to_eps_demo_out_colors.eps").
+    //scale(60).
+    title("Sample .eps figure (Palette demo)").
+    copyright("(C) 2003-2007 LEMON Project").
+    coords(hcoords).
+    absoluteNodeSizes().absoluteArcWidths().
+    nodeScale(45).
+    distantColorNodeTexts().
+    //    distantBWNodeTexts().
+    nodeTexts(hcolors).nodeTextSize(.6).
+    nodeColors(composeMap(paletteW,hcolors)).
+    run();
+}
diff --git a/lemon/Makefile.am b/lemon/Makefile.am
--- a/lemon/Makefile.am
+++ b/lemon/Makefile.am
@@ -9,6 +9,7 @@
 lemon_libemon_la_SOURCES = \
         lemon/arg_parser.cc \
         lemon/base.cc \
+        lemon/color.cc \
         lemon/random.cc
 
 
@@ -20,10 +21,12 @@
 	lemon/assert.h \
         lemon/bfs.h \
         lemon/bin_heap.h \
+        lemon/color.h \
         lemon/dfs.h \
         lemon/dijkstra.h \
         lemon/dim2.h \
 	lemon/error.h \
+        lemon/graph_to_eps.h \
 	lemon/graph_utils.h \
 	lemon/kruskal.h \
 	lemon/list_graph.h \
@@ -39,6 +42,7 @@
 	lemon/bits/alteration_notifier.h \
 	lemon/bits/array_map.h \
 	lemon/bits/base_extender.h \
+        lemon/bits/bezier.h \
 	lemon/bits/default_map.h \
 	lemon/bits/graph_extender.h \
         lemon/bits/invalid.h \
diff --git a/lemon/arg_parser.cc b/lemon/arg_parser.cc
--- a/lemon/arg_parser.cc
+++ b/lemon/arg_parser.cc
@@ -194,6 +194,7 @@
   {
     Opts::iterator i = _opts.find(opt);
     LEMON_ASSERT(i!=_opts.end(), "Unknown option: '"+opt+"'");
+    if(i==_opts.end()) std::cout << "JAJJJJJJJJ\n";
     LEMON_ASSERT(!(i->second.ingroup), 
                  "Option already in option group: '"+opt+"'");
     GroupData &g=_groups[group];
diff --git a/lemon/bits/bezier.h b/lemon/bits/bezier.h
new file mode 100644
--- /dev/null
+++ b/lemon/bits/bezier.h
@@ -0,0 +1,176 @@
+/* -*- C++ -*-
+ *
+ * This file is a part of LEMON, a generic C++ optimization library
+ *
+ * Copyright (C) 2003-2008
+ * 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.
+ *
+ */
+
+#ifndef LEMON_BEZIER_H
+#define LEMON_BEZIER_H
+
+///\ingroup misc
+///\file
+///\brief Classes to compute with Bezier curves.
+///
+///Up to now this file is used internally by \ref graph_to_eps.h
+///
+///\author Alpar Juttner
+
+#include<lemon/dim2.h>
+
+namespace lemon {
+  namespace dim2 {
+
+class BezierBase {
+public:
+  typedef Point<double> Point;
+protected:
+  static Point conv(Point x,Point y,double t) {return (1-t)*x+t*y;}
+};
+
+class Bezier1 : public BezierBase
+{
+public:
+  Point p1,p2;
+
+  Bezier1() {}
+  Bezier1(Point _p1, Point _p2) :p1(_p1), p2(_p2) {}
+  
+  Point operator()(double t) const
+  {
+    //    return conv(conv(p1,p2,t),conv(p2,p3,t),t);
+    return conv(p1,p2,t);
+  }
+  Bezier1 before(double t) const
+  {
+    return Bezier1(p1,conv(p1,p2,t));
+  }
+  
+  Bezier1 after(double t) const
+  {
+    return Bezier1(conv(p1,p2,t),p2);
+  }
+
+  Bezier1 revert() const { return Bezier1(p2,p1);}
+  Bezier1 operator()(double a,double b) const { return before(b).after(a/b); }
+  Point grad() const { return p2-p1; }
+  Point norm() const { return rot90(p2-p1); }
+  Point grad(double) const { return grad(); }
+  Point norm(double t) const { return rot90(grad(t)); }
+};
+
+class Bezier2 : public BezierBase
+{
+public:
+  Point p1,p2,p3;
+
+  Bezier2() {}
+  Bezier2(Point _p1, Point _p2, Point _p3) :p1(_p1), p2(_p2), p3(_p3) {}
+  Bezier2(const Bezier1 &b) : p1(b.p1), p2(conv(b.p1,b.p2,.5)), p3(b.p2) {}
+  Point operator()(double t) const
+  {
+    //    return conv(conv(p1,p2,t),conv(p2,p3,t),t);
+    return ((1-t)*(1-t))*p1+(2*(1-t)*t)*p2+(t*t)*p3;
+  }
+  Bezier2 before(double t) const
+  {
+    Point q(conv(p1,p2,t));
+    Point r(conv(p2,p3,t));
+    return Bezier2(p1,q,conv(q,r,t));
+  }
+  
+  Bezier2 after(double t) const
+  {
+    Point q(conv(p1,p2,t));
+    Point r(conv(p2,p3,t));
+    return Bezier2(conv(q,r,t),r,p3);
+  }
+  Bezier2 revert() const { return Bezier2(p3,p2,p1);}
+  Bezier2 operator()(double a,double b) const { return before(b).after(a/b); }
+  Bezier1 grad() const { return Bezier1(2.0*(p2-p1),2.0*(p3-p2)); }
+  Bezier1 norm() const { return Bezier1(2.0*rot90(p2-p1),2.0*rot90(p3-p2)); }
+  Point grad(double t) const { return grad()(t); }
+  Point norm(double t) const { return rot90(grad(t)); }
+};
+
+class Bezier3 : public BezierBase
+{
+public:
+  Point p1,p2,p3,p4;
+
+  Bezier3() {}
+  Bezier3(Point _p1, Point _p2, Point _p3, Point _p4)
+    : p1(_p1), p2(_p2), p3(_p3), p4(_p4) {}
+  Bezier3(const Bezier1 &b) : p1(b.p1), p2(conv(b.p1,b.p2,1.0/3.0)), 
+			      p3(conv(b.p1,b.p2,2.0/3.0)), p4(b.p2) {}
+  Bezier3(const Bezier2 &b) : p1(b.p1), p2(conv(b.p1,b.p2,2.0/3.0)),
+			      p3(conv(b.p2,b.p3,1.0/3.0)), p4(b.p3) {}
+  
+  Point operator()(double t) const 
+    {
+      //    return Bezier2(conv(p1,p2,t),conv(p2,p3,t),conv(p3,p4,t))(t);
+      return ((1-t)*(1-t)*(1-t))*p1+(3*t*(1-t)*(1-t))*p2+
+	(3*t*t*(1-t))*p3+(t*t*t)*p4;
+    }
+  Bezier3 before(double t) const
+    {
+      Point p(conv(p1,p2,t));
+      Point q(conv(p2,p3,t));
+      Point r(conv(p3,p4,t));
+      Point a(conv(p,q,t));
+      Point b(conv(q,r,t));
+      Point c(conv(a,b,t));
+      return Bezier3(p1,p,a,c);
+    }
+  
+  Bezier3 after(double t) const
+    {
+      Point p(conv(p1,p2,t));
+      Point q(conv(p2,p3,t));
+      Point r(conv(p3,p4,t));
+      Point a(conv(p,q,t));
+      Point b(conv(q,r,t));
+      Point c(conv(a,b,t));
+      return Bezier3(c,b,r,p4);
+    }
+  Bezier3 revert() const { return Bezier3(p4,p3,p2,p1);}
+  Bezier3 operator()(double a,double b) const { return before(b).after(a/b); }
+  Bezier2 grad() const { return Bezier2(3.0*(p2-p1),3.0*(p3-p2),3.0*(p4-p3)); }
+  Bezier2 norm() const { return Bezier2(3.0*rot90(p2-p1),
+				  3.0*rot90(p3-p2),
+				  3.0*rot90(p4-p3)); }
+  Point grad(double t) const { return grad()(t); }
+  Point norm(double t) const { return rot90(grad(t)); }
+
+  template<class R,class F,class S,class D>
+  R recSplit(F &_f,const S &_s,D _d) const 
+  {
+    const Point a=(p1+p2)/2;
+    const Point b=(p2+p3)/2;
+    const Point c=(p3+p4)/2;
+    const Point d=(a+b)/2;
+    const Point e=(b+c)/2;
+    const Point f=(d+e)/2;
+    R f1=_f(Bezier3(p1,a,d,e),_d);
+    R f2=_f(Bezier3(e,d,c,p4),_d);
+    return _s(f1,f2);
+  }
+  
+};
+
+
+} //END OF NAMESPACE dim2
+} //END OF NAMESPACE lemon
+
+#endif // LEMON_BEZIER_H
diff --git a/lemon/color.cc b/lemon/color.cc
new file mode 100644
--- /dev/null
+++ b/lemon/color.cc
@@ -0,0 +1,44 @@
+/* -*- C++ -*-
+ *
+ * This file is a part of LEMON, a generic C++ optimization library
+ *
+ * Copyright (C) 2003-2008
+ * 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.
+ *
+ */
+
+///\file
+///\brief Color constants
+
+#include<lemon/color.h>
+
+namespace lemon {
+
+  const Color WHITE(1,1,1);
+  
+  const Color BLACK(0,0,0);
+  const Color RED(1,0,0);
+  const Color GREEN(0,1,0);
+  const Color BLUE(0,0,1);
+  const Color YELLOW(1,1,0);
+  const Color MAGENTA(1,0,1);
+  const Color CYAN(0,1,1);
+
+  const Color GREY(0,0,0);
+  const Color DARK_RED(.5,0,0);
+  const Color DARK_GREEN(0,.5,0);
+  const Color DARK_BLUE(0,0,.5);
+  const Color DARK_YELLOW(.5,.5,0);
+  const Color DARK_MAGENTA(.5,0,.5);
+  const Color DARK_CYAN(0,.5,.5);
+    
+} //namespace lemon
diff --git a/lemon/color.h b/lemon/color.h
new file mode 100644
--- /dev/null
+++ b/lemon/color.h
@@ -0,0 +1,207 @@
+/* -*- C++ -*-
+ *
+ * This file is a part of LEMON, a generic C++ optimization library
+ *
+ * Copyright (C) 2003-2008
+ * 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.
+ *
+ */
+
+#ifndef LEMON_COLOR_H
+#define LEMON_COLOR_H
+
+#include<vector>
+#include<lemon/math.h>
+#include<lemon/maps.h>
+
+
+///\ingroup misc
+///\file
+///\brief Tools to manage RGB colors.
+///
+///\author Alpar Juttner
+
+namespace lemon {
+
+
+  /// \addtogroup misc
+  /// @{
+
+  ///Data structure representing RGB colors.
+
+  ///Data structure representing RGB colors.
+  class Color
+  {
+    double _r,_g,_b;
+  public:
+    ///Default constructor
+    Color() {}
+    ///Constructor
+    Color(double r,double g,double b) :_r(r),_g(g),_b(b) {};
+    ///Set the red component
+    double & red() {return _r;}
+    ///Return the red component
+    const double & red() const {return _r;}
+    ///Set the green component
+    double & green() {return _g;}
+    ///Return the green component
+    const double & green() const {return _g;}
+    ///Set the blue component
+    double & blue() {return _b;}
+    ///Return the blue component
+    const double & blue() const {return _b;}
+    ///Set the color components
+    void set(double r,double g,double b) { _r=r;_g=g;_b=b; };
+  };
+
+  /// White color constant
+  extern const Color WHITE;  
+  /// Black color constant
+  extern const Color BLACK;
+  /// Red color constant
+  extern const Color RED;
+  /// Green color constant
+  extern const Color GREEN;
+  /// Blue color constant
+  extern const Color BLUE;
+  /// Yellow color constant
+  extern const Color YELLOW;
+  /// Magenta color constant
+  extern const Color MAGENTA;
+  /// Cyan color constant
+  extern const Color CYAN;
+  /// Grey color constant
+  extern const Color GREY;
+  /// Dark red color constant
+  extern const Color DARK_RED;
+  /// Dark green color constant
+  extern const Color DARK_GREEN;
+  /// Drak blue color constant
+  extern const Color DARK_BLUE;
+  /// Dark yellow color constant
+  extern const Color DARK_YELLOW;
+  /// Dark magenta color constant
+  extern const Color DARK_MAGENTA;
+  /// Dark cyan color constant
+  extern const Color DARK_CYAN;
+
+  ///Map <tt>int</tt>s to different \ref Color "Color"s
+
+  ///This map assigns one of the predefined \ref Color "Color"s to
+  ///each <tt>int</tt>. It is possible to change the colors as well as
+  ///their number. The integer range is cyclically mapped to the
+  ///provided set of colors.
+  ///
+  ///This is a true \ref concepts::ReferenceMap "reference map", so
+  ///you can also change the actual colors.
+
+  class Palette : public MapBase<int,Color>
+  {
+    std::vector<Color> colors;
+  public:
+    ///Constructor
+
+    ///Constructor 
+    ///\param num the number of the allocated colors. If it is \c -1,
+    ///the default color configuration is set up (26 color plus the
+    ///white).  If \c num is less then 26/27 then the default color
+    ///list is cut. Otherwise the color list is filled repeatedly with
+    ///the default color list.  (The colors can be changed later on.)
+    ///\param have_white indicates whether white is amongst the
+    ///provided color (\c true) or not (\c false). If it is true,
+    ///white will be assigned to \c 0.
+    Palette(int num=-1,bool have_white=false)
+    {
+      if (num==0) return;
+      do {
+        if(have_white) colors.push_back(Color(1,1,1));
+
+        colors.push_back(Color(0,0,0));
+        colors.push_back(Color(1,0,0));
+        colors.push_back(Color(0,1,0));
+        colors.push_back(Color(0,0,1));
+        colors.push_back(Color(1,1,0));
+        colors.push_back(Color(1,0,1));
+        colors.push_back(Color(0,1,1));
+      
+        colors.push_back(Color(.5,0,0));
+        colors.push_back(Color(0,.5,0));
+        colors.push_back(Color(0,0,.5));
+        colors.push_back(Color(.5,.5,0));
+        colors.push_back(Color(.5,0,.5));
+        colors.push_back(Color(0,.5,.5));
+      
+        colors.push_back(Color(.5,.5,.5));
+        colors.push_back(Color(1,.5,.5));
+        colors.push_back(Color(.5,1,.5));
+        colors.push_back(Color(.5,.5,1));
+        colors.push_back(Color(1,1,.5));
+        colors.push_back(Color(1,.5,1));
+        colors.push_back(Color(.5,1,1));
+      
+        colors.push_back(Color(1,.5,0));
+        colors.push_back(Color(.5,1,0));
+        colors.push_back(Color(1,0,.5));
+        colors.push_back(Color(0,1,.5));
+        colors.push_back(Color(0,.5,1));
+        colors.push_back(Color(.5,0,1));
+      } while(int(colors.size())<num);
+      //    colors.push_back(Color(1,1,1));
+      if(num>=0) colors.resize(num);
+    }
+    ///\e
+    Color &operator[](int i)
+    {
+      return colors[i%colors.size()];
+    }
+    ///\e
+    const Color &operator[](int i) const
+    {
+      return colors[i%colors.size()];
+    }
+    ///\e
+    void set(int i,const Color &c)
+    {
+      colors[i%colors.size()]=c;
+    }
+    ///\e
+    void add(const Color &c) 
+    {
+      colors.push_back(c);
+    }
+
+    ///Sets the number of the exiting colors.
+    void resize(int s) { colors.resize(s);}
+    ///Returns the number of the existing colors.
+    int size() const { return int(colors.size());}
+  };
+
+  ///Returns a visible distinct \ref Color
+
+  ///Returns a \ref Color which is as different from the given parameter
+  ///as it is possible.
+  inline Color distantColor(const Color &c) 
+  {
+    return Color(c.red()<.5?1:0,c.green()<.5?1:0,c.blue()<.5?1:0);
+  }
+  ///Returns black for light colors and white for the dark ones.
+
+  ///Returns black for light colors and white for the dark ones.
+  inline Color distantBW(const Color &c){
+    return (.2125*c.red()+.7154*c.green()+.0721*c.blue())<.5 ? WHITE : BLACK;
+  }
+
+  /// @}
+
+} //END OF NAMESPACE LEMON
+
+#endif // LEMON_COLOR_H
diff --git a/lemon/graph_to_eps.h b/lemon/graph_to_eps.h
new file mode 100644
--- /dev/null
+++ b/lemon/graph_to_eps.h
@@ -0,0 +1,1170 @@
+/* -*- C++ -*-
+ *
+ * This file is a part of LEMON, a generic C++ optimization library
+ *
+ * Copyright (C) 2003-2008
+ * 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.
+ *
+ */
+
+#ifndef LEMON_GRAPH_TO_EPS_H
+#define LEMON_GRAPH_TO_EPS_H
+
+#include <sys/time.h>
+
+#ifdef WIN32
+#include <lemon/bits/mingw32_time.h>
+#endif
+
+#include<iostream>
+#include<fstream>
+#include<sstream>
+#include<algorithm>
+#include<vector>
+
+#include<ctime>
+
+#include<lemon/math.h>
+#include<lemon/bits/invalid.h>
+#include<lemon/dim2.h>
+#include<lemon/maps.h>
+#include<lemon/color.h>
+#include<lemon/bits/bezier.h>
+
+
+///\ingroup eps_io
+///\file
+///\brief Simple graph drawer
+///
+///\author Alpar Juttner
+
+namespace lemon {
+
+template<class MT>
+class _NegY {
+public:
+  typedef typename MT::Key Key;
+  typedef typename MT::Value Value;
+  const MT &map;
+  int yscale;
+  _NegY(const MT &m,bool b) : map(m), yscale(1-b*2) {}
+  Value operator[](Key n) { return Value(map[n].x,map[n].y*yscale);}
+};
+
+///Default traits class of \ref GraphToEps
+
+///Default traits class of \ref GraphToEps
+///
+///\c G is the type of the underlying graph.
+template<class G>
+struct DefaultGraphToEpsTraits
+{
+  typedef G Graph;
+  typedef typename Graph::Node Node;
+  typedef typename Graph::NodeIt NodeIt;
+  typedef typename Graph::Arc Arc;
+  typedef typename Graph::ArcIt ArcIt;
+  typedef typename Graph::InArcIt InArcIt;
+  typedef typename Graph::OutArcIt OutArcIt;
+  
+
+  const Graph &g;
+
+  std::ostream& os;
+  
+  typedef ConstMap<typename Graph::Node,dim2::Point<double> > CoordsMapType;
+  CoordsMapType _coords;
+  ConstMap<typename Graph::Node,double > _nodeSizes;
+  ConstMap<typename Graph::Node,int > _nodeShapes;
+
+  ConstMap<typename Graph::Node,Color > _nodeColors;
+  ConstMap<typename Graph::Arc,Color > _arcColors;
+
+  ConstMap<typename Graph::Arc,double > _arcWidths;
+
+  double _arcWidthScale;
+  
+  double _nodeScale;
+  double _xBorder, _yBorder;
+  double _scale;
+  double _nodeBorderQuotient;
+  
+  bool _drawArrows;
+  double _arrowLength, _arrowWidth;
+  
+  bool _showNodes, _showArcs;
+
+  bool _enableParallel;
+  double _parArcDist;
+
+  bool _showNodeText;
+  ConstMap<typename Graph::Node,bool > _nodeTexts;  
+  double _nodeTextSize;
+
+  bool _showNodePsText;
+  ConstMap<typename Graph::Node,bool > _nodePsTexts;  
+  char *_nodePsTextsPreamble;
+  
+  bool _undirected;
+
+  bool _pleaseRemoveOsStream;
+
+  bool _scaleToA4;
+
+  std::string _title;
+  std::string _copyright;
+
+  enum NodeTextColorType 
+    { DIST_COL=0, DIST_BW=1, CUST_COL=2, SAME_COL=3 } _nodeTextColorType;
+  ConstMap<typename Graph::Node,Color > _nodeTextColors;
+
+  bool _autoNodeScale;
+  bool _autoArcWidthScale;
+
+  bool _absoluteNodeSizes;
+  bool _absoluteArcWidths;
+
+  bool _negY;
+
+  bool _preScale;
+  ///Constructor
+
+  ///Constructor
+  ///\param _g is a reference to the graph to be printed
+  ///\param _os is a reference to the output stream.
+  ///\param _os is a reference to the output stream.
+  ///\param _pros If it is \c true, then the \c ostream referenced by \c _os
+  ///will be explicitly deallocated by the destructor.
+  ///By default it is <tt>std::cout</tt>
+  DefaultGraphToEpsTraits(const G &_g,std::ostream& _os=std::cout,
+			  bool _pros=false) :
+    g(_g), os(_os),
+    _coords(dim2::Point<double>(1,1)), _nodeSizes(.01), _nodeShapes(0),
+    _nodeColors(WHITE), _arcColors(BLACK),
+    _arcWidths(1.0), _arcWidthScale(0.003),
+    _nodeScale(1.0), _xBorder(10), _yBorder(10), _scale(1.0),
+    _nodeBorderQuotient(.1),
+    _drawArrows(false), _arrowLength(1), _arrowWidth(0.3),
+    _showNodes(true), _showArcs(true),
+    _enableParallel(false), _parArcDist(1),
+    _showNodeText(false), _nodeTexts(false), _nodeTextSize(1),
+    _showNodePsText(false), _nodePsTexts(false), _nodePsTextsPreamble(0),
+    _undirected(false),
+    _pleaseRemoveOsStream(_pros), _scaleToA4(false),
+    _nodeTextColorType(SAME_COL), _nodeTextColors(BLACK),
+    _autoNodeScale(false),
+    _autoArcWidthScale(false),
+    _absoluteNodeSizes(false),
+    _absoluteArcWidths(false),
+    _negY(false),
+    _preScale(true)
+  {}
+};
+
+///Helper class to implement the named parameters of \ref graphToEps()
+
+///Helper class to implement the named parameters of \ref graphToEps()
+///\todo Is 'helper class' a good name for this?
+///
+///\todo Follow PostScript's DSC.
+/// Use own dictionary.
+///\todo Useful new features.
+/// - Linestyles: dotted, dashed etc.
+/// - A second color and percent value for the lines.
+template<class T> class GraphToEps : public T 
+{
+  // Can't believe it is required by the C++ standard
+  using T::g;
+  using T::os;
+
+  using T::_coords;
+  using T::_nodeSizes;
+  using T::_nodeShapes;
+  using T::_nodeColors;
+  using T::_arcColors;
+  using T::_arcWidths;
+
+  using T::_arcWidthScale;
+  using T::_nodeScale;
+  using T::_xBorder;
+  using T::_yBorder;
+  using T::_scale;
+  using T::_nodeBorderQuotient;
+  
+  using T::_drawArrows;
+  using T::_arrowLength;
+  using T::_arrowWidth;
+  
+  using T::_showNodes;
+  using T::_showArcs;
+
+  using T::_enableParallel;
+  using T::_parArcDist;
+
+  using T::_showNodeText;
+  using T::_nodeTexts;  
+  using T::_nodeTextSize;
+
+  using T::_showNodePsText;
+  using T::_nodePsTexts;  
+  using T::_nodePsTextsPreamble;
+  
+  using T::_undirected;
+
+  using T::_pleaseRemoveOsStream;
+
+  using T::_scaleToA4;
+
+  using T::_title;
+  using T::_copyright;
+
+  using T::NodeTextColorType;
+  using T::CUST_COL;
+  using T::DIST_COL;
+  using T::DIST_BW;
+  using T::_nodeTextColorType;
+  using T::_nodeTextColors;
+
+  using T::_autoNodeScale;
+  using T::_autoArcWidthScale;
+
+  using T::_absoluteNodeSizes;
+  using T::_absoluteArcWidths;
+
+
+  using T::_negY;
+  using T::_preScale;
+
+  // dradnats ++C eht yb deriuqer si ti eveileb t'naC
+
+  typedef typename T::Graph Graph;
+  typedef typename Graph::Node Node;
+  typedef typename Graph::NodeIt NodeIt;
+  typedef typename Graph::Arc Arc;
+  typedef typename Graph::ArcIt ArcIt;
+  typedef typename Graph::InArcIt InArcIt;
+  typedef typename Graph::OutArcIt OutArcIt;
+
+  static const int INTERPOL_PREC;
+  static const double A4HEIGHT;
+  static const double A4WIDTH;
+  static const double A4BORDER;
+
+  bool dontPrint;
+
+public:
+  ///Node shapes
+
+  ///Node shapes
+  ///
+  enum NodeShapes { 
+    /// = 0
+    ///\image html nodeshape_0.png
+    ///\image latex nodeshape_0.eps "CIRCLE shape (0)" width=2cm
+    CIRCLE=0, 
+    /// = 1
+    ///\image html nodeshape_1.png
+    ///\image latex nodeshape_1.eps "SQUARE shape (1)" width=2cm
+    ///
+    SQUARE=1, 
+    /// = 2
+    ///\image html nodeshape_2.png
+    ///\image latex nodeshape_2.eps "DIAMOND shape (2)" width=2cm
+    ///
+    DIAMOND=2,
+    /// = 3
+    ///\image html nodeshape_3.png
+    ///\image latex nodeshape_2.eps "MALE shape (4)" width=2cm
+    ///
+    MALE=3,
+    /// = 4
+    ///\image html nodeshape_4.png
+    ///\image latex nodeshape_2.eps "FEMALE shape (4)" width=2cm
+    ///
+    FEMALE=4
+  };
+
+private:
+  class arcLess {
+    const Graph &g;
+  public:
+    arcLess(const Graph &_g) : g(_g) {}
+    bool operator()(Arc a,Arc b) const 
+    {
+      Node ai=std::min(g.source(a),g.target(a));
+      Node aa=std::max(g.source(a),g.target(a));
+      Node bi=std::min(g.source(b),g.target(b));
+      Node ba=std::max(g.source(b),g.target(b));
+      return ai<bi ||
+	(ai==bi && (aa < ba || 
+		    (aa==ba && ai==g.source(a) && bi==g.target(b))));
+    }
+  };
+  bool isParallel(Arc e,Arc f) const
+  {
+    return (g.source(e)==g.source(f)&&
+	    g.target(e)==g.target(f)) ||
+      (g.source(e)==g.target(f)&&
+       g.target(e)==g.source(f));
+  }
+  template<class TT>
+  static std::string psOut(const dim2::Point<TT> &p) 
+    {
+      std::ostringstream os;	
+      os << p.x << ' ' << p.y;
+      return os.str();
+    }
+  static std::string psOut(const Color &c) 
+    {
+      std::ostringstream os;	
+      os << c.red() << ' ' << c.green() << ' ' << c.blue();
+      return os.str();
+    }
+  
+public:
+  GraphToEps(const T &t) : T(t), dontPrint(false) {};
+  
+  template<class X> struct CoordsTraits : public T {
+  typedef X CoordsMapType;
+    const X &_coords;
+    CoordsTraits(const T &t,const X &x) : T(t), _coords(x) {}
+  };
+  ///Sets the map of the node coordinates
+
+  ///Sets the map of the node coordinates.
+  ///\param x must be a node map with dim2::Point<double> or
+  ///\ref dim2::Point "dim2::Point<int>" values. 
+  template<class X> GraphToEps<CoordsTraits<X> > coords(const X &x) {
+    dontPrint=true;
+    return GraphToEps<CoordsTraits<X> >(CoordsTraits<X>(*this,x));
+  }
+  template<class X> struct NodeSizesTraits : public T {
+    const X &_nodeSizes;
+    NodeSizesTraits(const T &t,const X &x) : T(t), _nodeSizes(x) {}
+  };
+  ///Sets the map of the node sizes
+
+  ///Sets the map of the node sizes
+  ///\param x must be a node map with \c double (or convertible) values. 
+  template<class X> GraphToEps<NodeSizesTraits<X> > nodeSizes(const X &x)
+  {
+    dontPrint=true;
+    return GraphToEps<NodeSizesTraits<X> >(NodeSizesTraits<X>(*this,x));
+  }
+  template<class X> struct NodeShapesTraits : public T {
+    const X &_nodeShapes;
+    NodeShapesTraits(const T &t,const X &x) : T(t), _nodeShapes(x) {}
+  };
+  ///Sets the map of the node shapes
+
+  ///Sets the map of the node shapes.
+  ///The availabe shape values
+  ///can be found in \ref NodeShapes "enum NodeShapes".
+  ///\param x must be a node map with \c int (or convertible) values. 
+  ///\sa NodeShapes
+  template<class X> GraphToEps<NodeShapesTraits<X> > nodeShapes(const X &x)
+  {
+    dontPrint=true;
+    return GraphToEps<NodeShapesTraits<X> >(NodeShapesTraits<X>(*this,x));
+  }
+  template<class X> struct NodeTextsTraits : public T {
+    const X &_nodeTexts;
+    NodeTextsTraits(const T &t,const X &x) : T(t), _nodeTexts(x) {}
+  };
+  ///Sets the text printed on the nodes
+
+  ///Sets the text printed on the nodes
+  ///\param x must be a node map with type that can be pushed to a standard
+  ///ostream. 
+  template<class X> GraphToEps<NodeTextsTraits<X> > nodeTexts(const X &x)
+  {
+    dontPrint=true;
+    _showNodeText=true;
+    return GraphToEps<NodeTextsTraits<X> >(NodeTextsTraits<X>(*this,x));
+  }
+  template<class X> struct NodePsTextsTraits : public T {
+    const X &_nodePsTexts;
+    NodePsTextsTraits(const T &t,const X &x) : T(t), _nodePsTexts(x) {}
+  };
+  ///Inserts a PostScript block to the nodes
+
+  ///With this command it is possible to insert a verbatim PostScript
+  ///block to the nodes.
+  ///The PS current point will be moved to the centre of the node before
+  ///the PostScript block inserted.
+  ///
+  ///Before and after the block a newline character is inserted so you
+  ///don't have to bother with the separators.
+  ///
+  ///\param x must be a node map with type that can be pushed to a standard
+  ///ostream.
+  ///
+  ///\sa nodePsTextsPreamble()
+  ///\todo Offer the choise not to move to the centre but pass the coordinates
+  ///to the Postscript block inserted.
+  template<class X> GraphToEps<NodePsTextsTraits<X> > nodePsTexts(const X &x)
+  {
+    dontPrint=true;
+    _showNodePsText=true;
+    return GraphToEps<NodePsTextsTraits<X> >(NodePsTextsTraits<X>(*this,x));
+  }
+  template<class X> struct ArcWidthsTraits : public T {
+    const X &_arcWidths;
+    ArcWidthsTraits(const T &t,const X &x) : T(t), _arcWidths(x) {}
+  };
+  ///Sets the map of the arc widths
+
+  ///Sets the map of the arc widths
+  ///\param x must be a arc map with \c double (or convertible) values. 
+  template<class X> GraphToEps<ArcWidthsTraits<X> > arcWidths(const X &x)
+  {
+    dontPrint=true;
+    return GraphToEps<ArcWidthsTraits<X> >(ArcWidthsTraits<X>(*this,x));
+  }
+
+  template<class X> struct NodeColorsTraits : public T {
+    const X &_nodeColors;
+    NodeColorsTraits(const T &t,const X &x) : T(t), _nodeColors(x) {}
+  };
+  ///Sets the map of the node colors
+
+  ///Sets the map of the node colors
+  ///\param x must be a node map with \ref Color values.
+  ///
+  ///\sa Palette
+  template<class X> GraphToEps<NodeColorsTraits<X> >
+  nodeColors(const X &x)
+  {
+    dontPrint=true;
+    return GraphToEps<NodeColorsTraits<X> >(NodeColorsTraits<X>(*this,x));
+  }
+  template<class X> struct NodeTextColorsTraits : public T {
+    const X &_nodeTextColors;
+    NodeTextColorsTraits(const T &t,const X &x) : T(t), _nodeTextColors(x) {}
+  };
+  ///Sets the map of the node text colors
+
+  ///Sets the map of the node text colors
+  ///\param x must be a node map with \ref Color values. 
+  ///
+  ///\sa Palette
+  template<class X> GraphToEps<NodeTextColorsTraits<X> >
+  nodeTextColors(const X &x)
+  {
+    dontPrint=true;
+    _nodeTextColorType=CUST_COL;
+    return GraphToEps<NodeTextColorsTraits<X> >
+      (NodeTextColorsTraits<X>(*this,x));
+  }
+  template<class X> struct ArcColorsTraits : public T {
+    const X &_arcColors;
+    ArcColorsTraits(const T &t,const X &x) : T(t), _arcColors(x) {}
+  };
+  ///Sets the map of the arc colors
+
+  ///Sets the map of the arc colors
+  ///\param x must be a arc map with \ref Color values. 
+  ///
+  ///\sa Palette
+  template<class X> GraphToEps<ArcColorsTraits<X> >
+  arcColors(const X &x)
+  {
+    dontPrint=true;
+    return GraphToEps<ArcColorsTraits<X> >(ArcColorsTraits<X>(*this,x));
+  }
+  ///Sets a global scale factor for node sizes
+
+  ///Sets a global scale factor for node sizes.
+  /// 
+  /// If nodeSizes() is not given, this function simply sets the node
+  /// sizes to \c d.  If nodeSizes() is given, but
+  /// autoNodeScale() is not, then the node size given by
+  /// nodeSizes() will be multiplied by the value \c d.
+  /// If both nodeSizes() and autoNodeScale() are used, then the
+  /// node sizes will be scaled in such a way that the greatest size will be
+  /// equal to \c d.
+  /// \sa nodeSizes()
+  /// \sa autoNodeScale()
+  GraphToEps<T> &nodeScale(double d) {_nodeScale=d;return *this;}
+  ///Turns on/off the automatic node width scaling.
+
+  ///Turns on/off the automatic node width scaling.
+  ///
+  ///\sa nodeScale()
+  ///
+  GraphToEps<T> &autoNodeScale(bool b=true) {
+    _autoNodeScale=b;return *this;
+  }
+
+  ///Turns on/off the absolutematic node width scaling.
+
+  ///Turns on/off the absolutematic node width scaling.
+  ///
+  ///\sa nodeScale()
+  ///
+  GraphToEps<T> &absoluteNodeSizes(bool b=true) {
+    _absoluteNodeSizes=b;return *this;
+  }
+
+  ///Negates the Y coordinates.
+
+  ///Negates the Y coordinates.
+  ///
+  ///\todo More docs.
+  ///
+  GraphToEps<T> &negateY(bool b=true) {
+    _negY=b;return *this;
+  }
+
+  ///Turn on/off prescaling
+
+  ///By default graphToEps() rescales the whole image in order to avoid
+  ///very big or very small bounding boxes.
+  ///
+  ///This (p)rescaling can be turned off with this function.
+  ///
+  GraphToEps<T> &preScale(bool b=true) {
+    _preScale=b;return *this;
+  }
+
+  ///Sets a global scale factor for arc widths
+
+  /// Sets a global scale factor for arc widths.
+  ///
+  /// If arcWidths() is not given, this function simply sets the arc
+  /// widths to \c d.  If arcWidths() is given, but
+  /// autoArcWidthScale() is not, then the arc withs given by
+  /// arcWidths() will be multiplied by the value \c d.
+  /// If both arcWidths() and autoArcWidthScale() are used, then the
+  /// arc withs will be scaled in such a way that the greatest width will be
+  /// equal to \c d.
+  GraphToEps<T> &arcWidthScale(double d) {_arcWidthScale=d;return *this;}
+  ///Turns on/off the automatic arc width scaling.
+
+  ///Turns on/off the automatic arc width scaling.
+  ///
+  ///\sa arcWidthScale()
+  ///
+  GraphToEps<T> &autoArcWidthScale(bool b=true) {
+    _autoArcWidthScale=b;return *this;
+  }
+  ///Turns on/off the absolutematic arc width scaling.
+
+  ///Turns on/off the absolutematic arc width scaling.
+  ///
+  ///\sa arcWidthScale()
+  ///
+  GraphToEps<T> &absoluteArcWidths(bool b=true) {
+    _absoluteArcWidths=b;return *this;
+  }
+  ///Sets a global scale factor for the whole picture
+
+  ///Sets a global scale factor for the whole picture
+  ///
+
+  GraphToEps<T> &scale(double d) {_scale=d;return *this;}
+  ///Sets the width of the border around the picture
+
+  ///Sets the width of the border around the picture
+  ///
+  GraphToEps<T> &border(double b) {_xBorder=_yBorder=b;return *this;}
+  ///Sets the width of the border around the picture
+
+  ///Sets the width of the border around the picture
+  ///
+  GraphToEps<T> &border(double x, double y) {
+    _xBorder=x;_yBorder=y;return *this;
+  }
+  ///Sets whether to draw arrows
+
+  ///Sets whether to draw arrows
+  ///
+  GraphToEps<T> &drawArrows(bool b=true) {_drawArrows=b;return *this;}
+  ///Sets the length of the arrowheads
+
+  ///Sets the length of the arrowheads
+  ///
+  GraphToEps<T> &arrowLength(double d) {_arrowLength*=d;return *this;}
+  ///Sets the width of the arrowheads
+
+  ///Sets the width of the arrowheads
+  ///
+  GraphToEps<T> &arrowWidth(double d) {_arrowWidth*=d;return *this;}
+  
+  ///Scales the drawing to fit to A4 page
+
+  ///Scales the drawing to fit to A4 page
+  ///
+  GraphToEps<T> &scaleToA4() {_scaleToA4=true;return *this;}
+  
+  ///Enables parallel arcs
+
+  ///Enables parallel arcs
+  GraphToEps<T> &enableParallel(bool b=true) {_enableParallel=b;return *this;}
+  
+  ///Sets the distance 
+  
+  ///Sets the distance 
+  ///
+  GraphToEps<T> &parArcDist(double d) {_parArcDist*=d;return *this;}
+  
+  ///Hides the arcs
+  
+  ///Hides the arcs
+  ///
+  GraphToEps<T> &hideArcs(bool b=true) {_showArcs=!b;return *this;}
+  ///Hides the nodes
+  
+  ///Hides the nodes
+  ///
+  GraphToEps<T> &hideNodes(bool b=true) {_showNodes=!b;return *this;}
+  
+  ///Sets the size of the node texts
+  
+  ///Sets the size of the node texts
+  ///
+  GraphToEps<T> &nodeTextSize(double d) {_nodeTextSize=d;return *this;}
+
+  ///Sets the color of the node texts to be different from the node color
+
+  ///Sets the color of the node texts to be as different from the node color
+  ///as it is possible
+  ///
+  GraphToEps<T> &distantColorNodeTexts()
+  {_nodeTextColorType=DIST_COL;return *this;}
+  ///Sets the color of the node texts to be black or white and always visible.
+
+  ///Sets the color of the node texts to be black or white according to
+  ///which is more 
+  ///different from the node color
+  ///
+  GraphToEps<T> &distantBWNodeTexts()
+  {_nodeTextColorType=DIST_BW;return *this;}
+
+  ///Gives a preamble block for node Postscript block.
+  
+  ///Gives a preamble block for node Postscript block.
+  ///
+  ///\sa nodePsTexts()
+  GraphToEps<T> & nodePsTextsPreamble(const char *str) {
+    _nodePsTextsPreamble=str ;return *this;
+  }
+  ///Sets whether the the graph is undirected
+
+  ///Sets whether the the graph is undirected
+  ///
+  GraphToEps<T> &undirected(bool b=true) {_undirected=b;return *this;}
+
+  ///Sets whether the the graph is directed
+
+  ///Sets whether the the graph is directed.
+  ///Use it to show the edges as a pair of directed ones.
+  GraphToEps<T> &bidir(bool b=true) {_undirected=!b;return *this;}
+
+  ///Sets the title.
+
+  ///Sets the title of the generated image,
+  ///namely it inserts a <tt>%%Title:</tt> DSC field to the header of
+  ///the EPS file.
+  GraphToEps<T> &title(const std::string &t) {_title=t;return *this;}
+  ///Sets the copyright statement.
+
+  ///Sets the copyright statement of the generated image,
+  ///namely it inserts a <tt>%%Copyright:</tt> DSC field to the header of
+  ///the EPS file.
+  ///\todo Multiline copyright notice could be supported.
+  GraphToEps<T> &copyright(const std::string &t) {_copyright=t;return *this;}
+
+protected:
+  bool isInsideNode(dim2::Point<double> p, double r,int t) 
+  {
+    switch(t) {
+    case CIRCLE:
+    case MALE:
+    case FEMALE:
+      return p.normSquare()<=r*r;
+    case SQUARE:
+      return p.x<=r&&p.x>=-r&&p.y<=r&&p.y>=-r;
+    case DIAMOND:
+      return p.x+p.y<=r && p.x-p.y<=r && -p.x+p.y<=r && -p.x-p.y<=r;
+    }
+    return false;
+  }
+
+public:
+  ~GraphToEps() { }
+  
+  ///Draws the graph.
+
+  ///Like other functions using
+  ///\ref named-templ-func-param "named template parameters",
+  ///this function calles the algorithm itself, i.e. in this case
+  ///it draws the graph.
+  void run() {
+    ///\todo better 'epsilon' would be nice here.
+    const double EPSILON=1e-9;
+    if(dontPrint) return;
+    
+    _NegY<typename T::CoordsMapType> mycoords(_coords,_negY);
+
+    os << "%!PS-Adobe-2.0 EPSF-2.0\n";
+    if(_title.size()>0) os << "%%Title: " << _title << '\n';
+     if(_copyright.size()>0) os << "%%Copyright: " << _copyright << '\n';
+//        << "%%Copyright: XXXX\n"
+    os << "%%Creator: LEMON, graphToEps()\n";
+    
+    {
+      char cbuf[50];
+      timeval tv;
+      gettimeofday(&tv, 0);
+      ctime_r(&tv.tv_sec,cbuf);
+      os << "%%CreationDate: " << cbuf;
+    }
+
+    if (_autoArcWidthScale) {
+      double max_w=0;
+      for(ArcIt e(g);e!=INVALID;++e)
+	max_w=std::max(double(_arcWidths[e]),max_w);
+      ///\todo better 'epsilon' would be nice here.
+      if(max_w>EPSILON) {
+	_arcWidthScale/=max_w;
+      }
+    }
+
+    if (_autoNodeScale) {
+      double max_s=0;
+      for(NodeIt n(g);n!=INVALID;++n)
+	max_s=std::max(double(_nodeSizes[n]),max_s);
+      ///\todo better 'epsilon' would be nice here.
+      if(max_s>EPSILON) {
+	_nodeScale/=max_s;
+      }
+    }
+
+    double diag_len = 1;
+    if(!(_absoluteNodeSizes&&_absoluteArcWidths)) {
+      dim2::BoundingBox<double> bb;
+      for(NodeIt n(g);n!=INVALID;++n) bb.add(mycoords[n]);
+      if (bb.empty()) {
+	bb = dim2::BoundingBox<double>(dim2::Point<double>(0,0));
+      }
+      diag_len = std::sqrt((bb.bottomLeft()-bb.topRight()).normSquare());
+      if(diag_len<EPSILON) diag_len = 1;
+      if(!_absoluteNodeSizes) _nodeScale*=diag_len;
+      if(!_absoluteArcWidths) _arcWidthScale*=diag_len;
+    }
+    
+    dim2::BoundingBox<double> bb;
+    for(NodeIt n(g);n!=INVALID;++n) {
+      double ns=_nodeSizes[n]*_nodeScale;
+      dim2::Point<double> p(ns,ns);
+      switch(_nodeShapes[n]) {
+      case CIRCLE:
+      case SQUARE:
+      case DIAMOND:
+	bb.add(p+mycoords[n]);
+	bb.add(-p+mycoords[n]);
+	break;
+      case MALE:
+	bb.add(-p+mycoords[n]);
+	bb.add(dim2::Point<double>(1.5*ns,1.5*std::sqrt(3.0)*ns)+mycoords[n]);
+	break;
+      case FEMALE:
+	bb.add(p+mycoords[n]);
+	bb.add(dim2::Point<double>(-ns,-3.01*ns)+mycoords[n]);
+	break;
+      }
+    }
+    if (bb.empty()) {
+      bb = dim2::BoundingBox<double>(dim2::Point<double>(0,0));
+    }
+    
+    if(_scaleToA4)
+      os <<"%%BoundingBox: 0 0 596 842\n%%DocumentPaperSizes: a4\n";
+    else {
+      if(_preScale) {
+	//Rescale so that BoundingBox won't be neither to big nor too small.
+	while(bb.height()*_scale>1000||bb.width()*_scale>1000) _scale/=10;
+	while(bb.height()*_scale<100||bb.width()*_scale<100) _scale*=10;
+      }
+      
+      os << "%%BoundingBox: "
+	 << int(floor(bb.left()   * _scale - _xBorder)) << ' '
+	 << int(floor(bb.bottom() * _scale - _yBorder)) << ' '
+	 << int(ceil(bb.right()  * _scale + _xBorder)) << ' '
+	 << int(ceil(bb.top()    * _scale + _yBorder)) << '\n';
+    }
+    
+    os << "%%EndComments\n";
+    
+    //x1 y1 x2 y2 x3 y3 cr cg cb w
+    os << "/lb { setlinewidth setrgbcolor newpath moveto\n"
+       << "      4 2 roll 1 index 1 index curveto stroke } bind def\n";
+    os << "/l { setlinewidth setrgbcolor newpath moveto lineto stroke } bind def\n";
+    //x y r
+    os << "/c { newpath dup 3 index add 2 index moveto 0 360 arc closepath } bind def\n";
+    //x y r
+    os << "/sq { newpath 2 index 1 index add 2 index 2 index add moveto\n"
+       << "      2 index 1 index sub 2 index 2 index add lineto\n"
+       << "      2 index 1 index sub 2 index 2 index sub lineto\n"
+       << "      2 index 1 index add 2 index 2 index sub lineto\n"
+       << "      closepath pop pop pop} bind def\n";
+    //x y r
+    os << "/di { newpath 2 index 1 index add 2 index moveto\n"
+       << "      2 index             2 index 2 index add lineto\n"
+       << "      2 index 1 index sub 2 index             lineto\n"
+       << "      2 index             2 index 2 index sub lineto\n"
+       << "      closepath pop pop pop} bind def\n";
+    // x y r cr cg cb
+    os << "/nc { 0 0 0 setrgbcolor 5 index 5 index 5 index c fill\n"
+       << "     setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
+       << "   } bind def\n";
+    os << "/nsq { 0 0 0 setrgbcolor 5 index 5 index 5 index sq fill\n"
+       << "     setrgbcolor " << 1+_nodeBorderQuotient << " div sq fill\n"
+       << "   } bind def\n";
+    os << "/ndi { 0 0 0 setrgbcolor 5 index 5 index 5 index di fill\n"
+       << "     setrgbcolor " << 1+_nodeBorderQuotient << " div di fill\n"
+       << "   } bind def\n";
+    os << "/nfemale { 0 0 0 setrgbcolor 3 index "
+       << _nodeBorderQuotient/(1+_nodeBorderQuotient)
+       << " 1.5 mul mul setlinewidth\n"
+       << "  newpath 5 index 5 index moveto "
+       << "5 index 5 index 5 index 3.01 mul sub\n"
+       << "  lineto 5 index 4 index .7 mul sub 5 index 5 index 2.2 mul sub moveto\n"
+       << "  5 index 4 index .7 mul add 5 index 5 index 2.2 mul sub lineto stroke\n"
+       << "  5 index 5 index 5 index c fill\n"
+       << "  setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
+       << "  } bind def\n";
+    os << "/nmale {\n"
+       << "  0 0 0 setrgbcolor 3 index "
+       << _nodeBorderQuotient/(1+_nodeBorderQuotient)
+       <<" 1.5 mul mul setlinewidth\n"
+       << "  newpath 5 index 5 index moveto\n"
+       << "  5 index 4 index 1 mul 1.5 mul add\n"
+       << "  5 index 5 index 3 sqrt 1.5 mul mul add\n"
+       << "  1 index 1 index lineto\n"
+       << "  1 index 1 index 7 index sub moveto\n"
+       << "  1 index 1 index lineto\n"
+       << "  exch 5 index 3 sqrt .5 mul mul sub exch 5 index .5 mul sub lineto\n"
+       << "  stroke\n"
+       << "  5 index 5 index 5 index c fill\n"
+       << "  setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
+       << "  } bind def\n";
+    
+
+    os << "/arrl " << _arrowLength << " def\n";
+    os << "/arrw " << _arrowWidth << " def\n";
+    // l dx_norm dy_norm
+    os << "/lrl { 2 index mul exch 2 index mul exch rlineto pop} bind def\n";
+    //len w dx_norm dy_norm x1 y1 cr cg cb
+    os << "/arr { setrgbcolor /y1 exch def /x1 exch def /dy exch def /dx exch def\n"
+       << "       /w exch def /len exch def\n"
+      //	 << "       0.1 setlinewidth x1 y1 moveto dx len mul dy len mul rlineto stroke"
+       << "       newpath x1 dy w 2 div mul add y1 dx w 2 div mul sub moveto\n"
+       << "       len w sub arrl sub dx dy lrl\n"
+       << "       arrw dy dx neg lrl\n"
+       << "       dx arrl w add mul dy w 2 div arrw add mul sub\n"
+       << "       dy arrl w add mul dx w 2 div arrw add mul add rlineto\n"
+       << "       dx arrl w add mul neg dy w 2 div arrw add mul sub\n"
+       << "       dy arrl w add mul neg dx w 2 div arrw add mul add rlineto\n"
+       << "       arrw dy dx neg lrl\n"
+       << "       len w sub arrl sub neg dx dy lrl\n"
+       << "       closepath fill } bind def\n";
+    os << "/cshow { 2 index 2 index moveto dup stringwidth pop\n"
+       << "         neg 2 div fosi .35 mul neg rmoveto show pop pop} def\n";
+
+    os << "\ngsave\n";
+    if(_scaleToA4)
+      if(bb.height()>bb.width()) {
+	double sc= std::min((A4HEIGHT-2*A4BORDER)/bb.height(),
+		  (A4WIDTH-2*A4BORDER)/bb.width());
+	os << ((A4WIDTH -2*A4BORDER)-sc*bb.width())/2 + A4BORDER << ' '
+	   << ((A4HEIGHT-2*A4BORDER)-sc*bb.height())/2 + A4BORDER
+	   << " translate\n"
+	   << sc << " dup scale\n"
+	   << -bb.left() << ' ' << -bb.bottom() << " translate\n";
+      }
+      else {
+	//\todo Verify centering
+	double sc= std::min((A4HEIGHT-2*A4BORDER)/bb.width(),
+		  (A4WIDTH-2*A4BORDER)/bb.height());
+	os << ((A4WIDTH -2*A4BORDER)-sc*bb.height())/2 + A4BORDER << ' '
+	   << ((A4HEIGHT-2*A4BORDER)-sc*bb.width())/2 + A4BORDER 
+	   << " translate\n"
+	   << sc << " dup scale\n90 rotate\n"
+	   << -bb.left() << ' ' << -bb.top() << " translate\n";	
+	}
+    else if(_scale!=1.0) os << _scale << " dup scale\n";
+    
+    if(_showArcs) {
+      os << "%Arcs:\ngsave\n";      
+      if(_enableParallel) {
+	std::vector<Arc> el;
+	for(ArcIt e(g);e!=INVALID;++e)
+	  if((!_undirected||g.source(e)<g.target(e))&&_arcWidths[e]>0
+	     &&g.source(e)!=g.target(e))
+	    el.push_back(e);
+	std::sort(el.begin(),el.end(),arcLess(g));
+	
+	typename std::vector<Arc>::iterator j;
+	for(typename std::vector<Arc>::iterator i=el.begin();i!=el.end();i=j) {
+	  for(j=i+1;j!=el.end()&&isParallel(*i,*j);++j) ;
+
+	  double sw=0;
+	  for(typename std::vector<Arc>::iterator e=i;e!=j;++e)
+	    sw+=_arcWidths[*e]*_arcWidthScale+_parArcDist;
+	  sw-=_parArcDist;
+	  sw/=-2.0;
+	  dim2::Point<double>
+	    dvec(mycoords[g.target(*i)]-mycoords[g.source(*i)]);
+	  double l=std::sqrt(dvec.normSquare()); 
+	  ///\todo better 'epsilon' would be nice here.
+	  dim2::Point<double> d(dvec/std::max(l,EPSILON));
+ 	  dim2::Point<double> m;
+// 	  m=dim2::Point<double>(mycoords[g.target(*i)]+mycoords[g.source(*i)])/2.0;
+
+//  	  m=dim2::Point<double>(mycoords[g.source(*i)])+
+// 	    dvec*(double(_nodeSizes[g.source(*i)])/
+// 	       (_nodeSizes[g.source(*i)]+_nodeSizes[g.target(*i)]));
+
+ 	  m=dim2::Point<double>(mycoords[g.source(*i)])+
+	    d*(l+_nodeSizes[g.source(*i)]-_nodeSizes[g.target(*i)])/2.0;
+
+	  for(typename std::vector<Arc>::iterator e=i;e!=j;++e) {
+	    sw+=_arcWidths[*e]*_arcWidthScale/2.0;
+	    dim2::Point<double> mm=m+rot90(d)*sw/.75;
+	    if(_drawArrows) {
+	      int node_shape;
+	      dim2::Point<double> s=mycoords[g.source(*e)];
+	      dim2::Point<double> t=mycoords[g.target(*e)];
+	      double rn=_nodeSizes[g.target(*e)]*_nodeScale;
+	      node_shape=_nodeShapes[g.target(*e)];
+	      dim2::Bezier3 bez(s,mm,mm,t);
+	      double t1=0,t2=1;
+	      for(int ii=0;ii<INTERPOL_PREC;++ii)
+		if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape)) t2=(t1+t2)/2;
+		else t1=(t1+t2)/2;
+	      dim2::Point<double> apoint=bez((t1+t2)/2);
+	      rn = _arrowLength+_arcWidths[*e]*_arcWidthScale;
+	      rn*=rn;
+	      t2=(t1+t2)/2;t1=0;
+	      for(int ii=0;ii<INTERPOL_PREC;++ii)
+		if((bez((t1+t2)/2)-apoint).normSquare()>rn) t1=(t1+t2)/2;
+		else t2=(t1+t2)/2;
+	      dim2::Point<double> linend=bez((t1+t2)/2);	      
+	      bez=bez.before((t1+t2)/2);
+// 	      rn=_nodeSizes[g.source(*e)]*_nodeScale;
+// 	      node_shape=_nodeShapes[g.source(*e)];
+// 	      t1=0;t2=1;
+// 	      for(int i=0;i<INTERPOL_PREC;++i)
+// 		if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape)) t1=(t1+t2)/2;
+// 		else t2=(t1+t2)/2;
+// 	      bez=bez.after((t1+t2)/2);
+	      os << _arcWidths[*e]*_arcWidthScale << " setlinewidth "
+		 << _arcColors[*e].red() << ' '
+		 << _arcColors[*e].green() << ' '
+		 << _arcColors[*e].blue() << " setrgbcolor newpath\n"
+		 << bez.p1.x << ' ' <<  bez.p1.y << " moveto\n"
+		 << bez.p2.x << ' ' << bez.p2.y << ' '
+		 << bez.p3.x << ' ' << bez.p3.y << ' '
+		 << bez.p4.x << ' ' << bez.p4.y << " curveto stroke\n";
+	      dim2::Point<double> dd(rot90(linend-apoint));
+	      dd*=(.5*_arcWidths[*e]*_arcWidthScale+_arrowWidth)/
+		std::sqrt(dd.normSquare());
+	      os << "newpath " << psOut(apoint) << " moveto "
+		 << psOut(linend+dd) << " lineto "
+		 << psOut(linend-dd) << " lineto closepath fill\n";
+	    }
+	    else {
+	      os << mycoords[g.source(*e)].x << ' '
+		 << mycoords[g.source(*e)].y << ' '
+		 << mm.x << ' ' << mm.y << ' '
+		 << mycoords[g.target(*e)].x << ' '
+		 << mycoords[g.target(*e)].y << ' '
+		 << _arcColors[*e].red() << ' '
+		 << _arcColors[*e].green() << ' '
+		 << _arcColors[*e].blue() << ' '
+		 << _arcWidths[*e]*_arcWidthScale << " lb\n";
+	    }
+	    sw+=_arcWidths[*e]*_arcWidthScale/2.0+_parArcDist;
+	  }
+	}
+      }
+      else for(ArcIt e(g);e!=INVALID;++e)
+	if((!_undirected||g.source(e)<g.target(e))&&_arcWidths[e]>0
+	   &&g.source(e)!=g.target(e))
+	  if(_drawArrows) {
+	    dim2::Point<double> d(mycoords[g.target(e)]-mycoords[g.source(e)]);
+	    double rn=_nodeSizes[g.target(e)]*_nodeScale;
+	    int node_shape=_nodeShapes[g.target(e)];
+	    double t1=0,t2=1;
+	    for(int i=0;i<INTERPOL_PREC;++i)
+	      if(isInsideNode((-(t1+t2)/2)*d,rn,node_shape)) t1=(t1+t2)/2;
+	      else t2=(t1+t2)/2;
+	    double l=std::sqrt(d.normSquare());
+	    d/=l;
+	    
+	    os << l*(1-(t1+t2)/2) << ' '
+	       << _arcWidths[e]*_arcWidthScale << ' '
+	       << d.x << ' ' << d.y << ' '
+	       << mycoords[g.source(e)].x << ' '
+	       << mycoords[g.source(e)].y << ' '
+	       << _arcColors[e].red() << ' '
+	       << _arcColors[e].green() << ' '
+	       << _arcColors[e].blue() << " arr\n";
+	  }
+	  else os << mycoords[g.source(e)].x << ' '
+		  << mycoords[g.source(e)].y << ' '
+		  << mycoords[g.target(e)].x << ' '
+		  << mycoords[g.target(e)].y << ' '
+		  << _arcColors[e].red() << ' '
+		  << _arcColors[e].green() << ' '
+		  << _arcColors[e].blue() << ' '
+		  << _arcWidths[e]*_arcWidthScale << " l\n";
+      os << "grestore\n";
+    }
+    if(_showNodes) {
+      os << "%Nodes:\ngsave\n";
+      for(NodeIt n(g);n!=INVALID;++n) {
+	os << mycoords[n].x << ' ' << mycoords[n].y << ' '
+	   << _nodeSizes[n]*_nodeScale << ' '
+	   << _nodeColors[n].red() << ' '
+	   << _nodeColors[n].green() << ' '
+	   << _nodeColors[n].blue() << ' ';
+	switch(_nodeShapes[n]) {
+	case CIRCLE:
+	  os<< "nc";break;
+	case SQUARE:
+	  os<< "nsq";break;
+	case DIAMOND:
+	  os<< "ndi";break;
+	case MALE:
+	  os<< "nmale";break;
+	case FEMALE:
+	  os<< "nfemale";break;
+	}
+	os<<'\n';
+      }
+      os << "grestore\n";
+    }
+    if(_showNodeText) {
+      os << "%Node texts:\ngsave\n";
+      os << "/fosi " << _nodeTextSize << " def\n";
+      os << "(Helvetica) findfont fosi scalefont setfont\n";
+      for(NodeIt n(g);n!=INVALID;++n) {
+	switch(_nodeTextColorType) {
+	case DIST_COL:
+	  os << psOut(distantColor(_nodeColors[n])) << " setrgbcolor\n";
+	  break;
+	case DIST_BW:
+	  os << psOut(distantBW(_nodeColors[n])) << " setrgbcolor\n";
+	  break;
+	case CUST_COL:
+	  os << psOut(distantColor(_nodeTextColors[n])) << " setrgbcolor\n";
+	  break;
+	default:
+	  os << "0 0 0 setrgbcolor\n";
+	}
+	os << mycoords[n].x << ' ' << mycoords[n].y
+	   << " (" << _nodeTexts[n] << ") cshow\n";
+      }
+      os << "grestore\n";
+    }
+    if(_showNodePsText) {
+      os << "%Node PS blocks:\ngsave\n";
+      for(NodeIt n(g);n!=INVALID;++n)
+	os << mycoords[n].x << ' ' << mycoords[n].y
+	   << " moveto\n" << _nodePsTexts[n] << "\n";
+      os << "grestore\n";
+    }
+    
+    os << "grestore\nshowpage\n";
+
+    //CleanUp:
+    if(_pleaseRemoveOsStream) {delete &os;}
+  } 
+};
+
+template<class T>
+const int GraphToEps<T>::INTERPOL_PREC = 20;
+template<class T>
+const double GraphToEps<T>::A4HEIGHT = 841.8897637795276;
+template<class T>
+const double GraphToEps<T>::A4WIDTH  = 595.275590551181;
+template<class T>
+const double GraphToEps<T>::A4BORDER = 15;
+
+
+///Generates an EPS file from a graph
+
+///\ingroup eps_io
+///Generates an EPS file from a graph.
+///\param g is a reference to the graph to be printed
+///\param os is a reference to the output stream.
+///By default it is <tt>std::cout</tt>
+///
+///This function also has a lot of
+///\ref named-templ-func-param "named parameters",
+///they are declared as the members of class \ref GraphToEps. The following
+///example shows how to use these parameters.
+///\code
+/// graphToEps(g,os).scale(10).coords(coords)
+///              .nodeScale(2).nodeSizes(sizes)
+///              .arcWidthScale(.4).run();
+///\endcode
+///\warning Don't forget to put the \ref GraphToEps::run() "run()"
+///to the end of the parameter list.
+///\sa GraphToEps
+///\sa graphToEps(G &g, const char *file_name)
+template<class G>
+GraphToEps<DefaultGraphToEpsTraits<G> > 
+graphToEps(G &g, std::ostream& os=std::cout)
+{
+  return 
+    GraphToEps<DefaultGraphToEpsTraits<G> >(DefaultGraphToEpsTraits<G>(g,os));
+}
+ 
+///Generates an EPS file from a graph
+
+///\ingroup eps_io
+///This function does the same as
+///\ref graphToEps(G &g,std::ostream& os)
+///but it writes its output into the file \c file_name
+///instead of a stream.
+///\sa graphToEps(G &g, std::ostream& os)
+template<class G>
+GraphToEps<DefaultGraphToEpsTraits<G> > 
+graphToEps(G &g,const char *file_name)
+{
+  return GraphToEps<DefaultGraphToEpsTraits<G> >
+    (DefaultGraphToEpsTraits<G>(g,*new std::ofstream(file_name),true));
+}
+
+///Generates an EPS file from a graph
+
+///\ingroup eps_io
+///This function does the same as
+///\ref graphToEps(G &g,std::ostream& os)
+///but it writes its output into the file \c file_name
+///instead of a stream.
+///\sa graphToEps(G &g, std::ostream& os)
+template<class G>
+GraphToEps<DefaultGraphToEpsTraits<G> > 
+graphToEps(G &g,const std::string& file_name)
+{
+  return GraphToEps<DefaultGraphToEpsTraits<G> >
+    (DefaultGraphToEpsTraits<G>(g,*new std::ofstream(file_name.c_str()),true));
+}
+
+} //END OF NAMESPACE LEMON
+
+#endif // LEMON_GRAPH_TO_EPS_H