lemon/graph_to_eps.h
author Alpar Juttner <alpar@cs.elte.hu>
Tue, 06 Aug 2013 12:19:11 +0200
branch1.1
changeset 1248 14394c9603c2
parent 1158 8d2e55fac752
parent 1247 115031ac8001
permissions -rw-r--r--
Merge further fixes #470 to branch 1.1
     1 /* -*- mode: C++; indent-tabs-mode: nil; -*-
     2  *
     3  * This file is a part of LEMON, a generic C++ optimization library.
     4  *
     5  * Copyright (C) 2003-2011
     6  * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
     7  * (Egervary Research Group on Combinatorial Optimization, EGRES).
     8  *
     9  * Permission to use, modify and distribute this software is granted
    10  * provided that this copyright notice appears in all copies. For
    11  * precise terms see the accompanying LICENSE file.
    12  *
    13  * This software is provided "AS IS" with no warranty of any kind,
    14  * express or implied, and with no claim as to its suitability for any
    15  * purpose.
    16  *
    17  */
    18 
    19 #ifndef LEMON_GRAPH_TO_EPS_H
    20 #define LEMON_GRAPH_TO_EPS_H
    21 
    22 #include<iostream>
    23 #include<fstream>
    24 #include<sstream>
    25 #include<algorithm>
    26 #include<vector>
    27 
    28 #ifndef WIN32
    29 #include<sys/time.h>
    30 #include<ctime>
    31 #else
    32 #include<lemon/bits/windows.h>
    33 #endif
    34 
    35 #include<lemon/math.h>
    36 #include<lemon/core.h>
    37 #include<lemon/dim2.h>
    38 #include<lemon/maps.h>
    39 #include<lemon/color.h>
    40 #include<lemon/bits/bezier.h>
    41 #include<lemon/error.h>
    42 
    43 
    44 ///\ingroup eps_io
    45 ///\file
    46 ///\brief A well configurable tool for visualizing graphs
    47 
    48 namespace lemon {
    49 
    50   namespace _graph_to_eps_bits {
    51     template<class MT>
    52     class _NegY {
    53     public:
    54       typedef typename MT::Key Key;
    55       typedef typename MT::Value Value;
    56       const MT &map;
    57       int yscale;
    58       _NegY(const MT &m,bool b) : map(m), yscale(1-b*2) {}
    59       Value operator[](Key n) { return Value(map[n].x,map[n].y*yscale);}
    60     };
    61   }
    62 
    63 ///Default traits class of GraphToEps
    64 
    65 ///Default traits class of \ref GraphToEps.
    66 ///
    67 ///\param GR is the type of the underlying graph.
    68 template<class GR>
    69 struct DefaultGraphToEpsTraits
    70 {
    71   typedef GR Graph;
    72   typedef GR Digraph;
    73   typedef typename Graph::Node Node;
    74   typedef typename Graph::NodeIt NodeIt;
    75   typedef typename Graph::Arc Arc;
    76   typedef typename Graph::ArcIt ArcIt;
    77   typedef typename Graph::InArcIt InArcIt;
    78   typedef typename Graph::OutArcIt OutArcIt;
    79 
    80 
    81   const Graph &g;
    82 
    83   std::ostream& os;
    84 
    85   typedef ConstMap<typename Graph::Node,dim2::Point<double> > CoordsMapType;
    86   CoordsMapType _coords;
    87   ConstMap<typename Graph::Node,double > _nodeSizes;
    88   ConstMap<typename Graph::Node,int > _nodeShapes;
    89 
    90   ConstMap<typename Graph::Node,Color > _nodeColors;
    91   ConstMap<typename Graph::Arc,Color > _arcColors;
    92 
    93   ConstMap<typename Graph::Arc,double > _arcWidths;
    94 
    95   double _arcWidthScale;
    96 
    97   double _nodeScale;
    98   double _xBorder, _yBorder;
    99   double _scale;
   100   double _nodeBorderQuotient;
   101 
   102   bool _drawArrows;
   103   double _arrowLength, _arrowWidth;
   104 
   105   bool _showNodes, _showArcs;
   106 
   107   bool _enableParallel;
   108   double _parArcDist;
   109 
   110   bool _showNodeText;
   111   ConstMap<typename Graph::Node,bool > _nodeTexts;
   112   double _nodeTextSize;
   113 
   114   bool _showNodePsText;
   115   ConstMap<typename Graph::Node,bool > _nodePsTexts;
   116   char *_nodePsTextsPreamble;
   117 
   118   bool _undirected;
   119 
   120   bool _pleaseRemoveOsStream;
   121 
   122   bool _scaleToA4;
   123 
   124   std::string _title;
   125   std::string _copyright;
   126 
   127   enum NodeTextColorType
   128     { DIST_COL=0, DIST_BW=1, CUST_COL=2, SAME_COL=3 } _nodeTextColorType;
   129   ConstMap<typename Graph::Node,Color > _nodeTextColors;
   130 
   131   bool _autoNodeScale;
   132   bool _autoArcWidthScale;
   133 
   134   bool _absoluteNodeSizes;
   135   bool _absoluteArcWidths;
   136 
   137   bool _negY;
   138 
   139   bool _preScale;
   140   ///Constructor
   141 
   142   ///Constructor
   143   ///\param gr  Reference to the graph to be printed.
   144   ///\param ost Reference to the output stream.
   145   ///By default it is <tt>std::cout</tt>.
   146   ///\param pros If it is \c true, then the \c ostream referenced by \c os
   147   ///will be explicitly deallocated by the destructor.
   148   DefaultGraphToEpsTraits(const GR &gr, std::ostream& ost = std::cout,
   149                           bool pros = false) :
   150     g(gr), os(ost),
   151     _coords(dim2::Point<double>(1,1)), _nodeSizes(1), _nodeShapes(0),
   152     _nodeColors(WHITE), _arcColors(BLACK),
   153     _arcWidths(1.0), _arcWidthScale(0.003),
   154     _nodeScale(.01), _xBorder(10), _yBorder(10), _scale(1.0),
   155     _nodeBorderQuotient(.1),
   156     _drawArrows(false), _arrowLength(1), _arrowWidth(0.3),
   157     _showNodes(true), _showArcs(true),
   158     _enableParallel(false), _parArcDist(1),
   159     _showNodeText(false), _nodeTexts(false), _nodeTextSize(1),
   160     _showNodePsText(false), _nodePsTexts(false), _nodePsTextsPreamble(0),
   161     _undirected(lemon::UndirectedTagIndicator<GR>::value),
   162     _pleaseRemoveOsStream(pros), _scaleToA4(false),
   163     _nodeTextColorType(SAME_COL), _nodeTextColors(BLACK),
   164     _autoNodeScale(false),
   165     _autoArcWidthScale(false),
   166     _absoluteNodeSizes(false),
   167     _absoluteArcWidths(false),
   168     _negY(false),
   169     _preScale(true)
   170   {}
   171 };
   172 
   173 ///Auxiliary class to implement the named parameters of \ref graphToEps()
   174 
   175 ///Auxiliary class to implement the named parameters of \ref graphToEps().
   176 ///
   177 ///For detailed examples see the \ref graph_to_eps_demo.cc demo file.
   178 template<class T> class GraphToEps : public T
   179 {
   180   // Can't believe it is required by the C++ standard
   181   using T::g;
   182   using T::os;
   183 
   184   using T::_coords;
   185   using T::_nodeSizes;
   186   using T::_nodeShapes;
   187   using T::_nodeColors;
   188   using T::_arcColors;
   189   using T::_arcWidths;
   190 
   191   using T::_arcWidthScale;
   192   using T::_nodeScale;
   193   using T::_xBorder;
   194   using T::_yBorder;
   195   using T::_scale;
   196   using T::_nodeBorderQuotient;
   197 
   198   using T::_drawArrows;
   199   using T::_arrowLength;
   200   using T::_arrowWidth;
   201 
   202   using T::_showNodes;
   203   using T::_showArcs;
   204 
   205   using T::_enableParallel;
   206   using T::_parArcDist;
   207 
   208   using T::_showNodeText;
   209   using T::_nodeTexts;
   210   using T::_nodeTextSize;
   211 
   212   using T::_showNodePsText;
   213   using T::_nodePsTexts;
   214   using T::_nodePsTextsPreamble;
   215 
   216   using T::_undirected;
   217 
   218   using T::_pleaseRemoveOsStream;
   219 
   220   using T::_scaleToA4;
   221 
   222   using T::_title;
   223   using T::_copyright;
   224 
   225   using T::NodeTextColorType;
   226   using T::CUST_COL;
   227   using T::DIST_COL;
   228   using T::DIST_BW;
   229   using T::_nodeTextColorType;
   230   using T::_nodeTextColors;
   231 
   232   using T::_autoNodeScale;
   233   using T::_autoArcWidthScale;
   234 
   235   using T::_absoluteNodeSizes;
   236   using T::_absoluteArcWidths;
   237 
   238 
   239   using T::_negY;
   240   using T::_preScale;
   241 
   242   // dradnats ++C eht yb deriuqer si ti eveileb t'naC
   243 
   244   typedef typename T::Graph Graph;
   245   typedef typename T::Digraph Digraph;
   246   typedef typename Graph::Node Node;
   247   typedef typename Graph::NodeIt NodeIt;
   248   typedef typename Graph::Arc Arc;
   249   typedef typename Graph::ArcIt ArcIt;
   250   typedef typename Graph::InArcIt InArcIt;
   251   typedef typename Graph::OutArcIt OutArcIt;
   252 
   253   static const int INTERPOL_PREC;
   254   static const double A4HEIGHT;
   255   static const double A4WIDTH;
   256   static const double A4BORDER;
   257 
   258   bool dontPrint;
   259 
   260 public:
   261   ///Node shapes
   262 
   263   ///Node shapes.
   264   ///
   265   enum NodeShapes {
   266     /// = 0
   267     ///\image html nodeshape_0.png
   268     ///\image latex nodeshape_0.eps "CIRCLE shape (0)" width=2cm
   269     CIRCLE=0,
   270     /// = 1
   271     ///\image html nodeshape_1.png
   272     ///\image latex nodeshape_1.eps "SQUARE shape (1)" width=2cm
   273     SQUARE=1,
   274     /// = 2
   275     ///\image html nodeshape_2.png
   276     ///\image latex nodeshape_2.eps "DIAMOND shape (2)" width=2cm
   277     DIAMOND=2,
   278     /// = 3
   279     ///\image html nodeshape_3.png
   280     ///\image latex nodeshape_3.eps "MALE shape (3)" width=2cm
   281     MALE=3,
   282     /// = 4
   283     ///\image html nodeshape_4.png
   284     ///\image latex nodeshape_4.eps "FEMALE shape (4)" width=2cm
   285     FEMALE=4
   286   };
   287 
   288 private:
   289   class arcLess {
   290     const Graph &g;
   291   public:
   292     arcLess(const Graph &_g) : g(_g) {}
   293     bool operator()(Arc a,Arc b) const
   294     {
   295       Node ai=std::min(g.source(a),g.target(a));
   296       Node aa=std::max(g.source(a),g.target(a));
   297       Node bi=std::min(g.source(b),g.target(b));
   298       Node ba=std::max(g.source(b),g.target(b));
   299       return ai<bi ||
   300         (ai==bi && (aa < ba ||
   301                     (aa==ba && ai==g.source(a) && bi==g.target(b))));
   302     }
   303   };
   304   bool isParallel(Arc e,Arc f) const
   305   {
   306     return (g.source(e)==g.source(f)&&
   307             g.target(e)==g.target(f)) ||
   308       (g.source(e)==g.target(f)&&
   309        g.target(e)==g.source(f));
   310   }
   311   template<class TT>
   312   static std::string psOut(const dim2::Point<TT> &p)
   313     {
   314       std::ostringstream os;
   315       os << p.x << ' ' << p.y;
   316       return os.str();
   317     }
   318   static std::string psOut(const Color &c)
   319     {
   320       std::ostringstream os;
   321       os << c.red() << ' ' << c.green() << ' ' << c.blue();
   322       return os.str();
   323     }
   324 
   325 public:
   326   GraphToEps(const T &t) : T(t), dontPrint(false) {};
   327 
   328   template<class X> struct CoordsTraits : public T {
   329   typedef X CoordsMapType;
   330     const X &_coords;
   331     CoordsTraits(const T &t,const X &x) : T(t), _coords(x) {}
   332   };
   333   ///Sets the map of the node coordinates
   334 
   335   ///Sets the map of the node coordinates.
   336   ///\param x must be a node map with \ref dim2::Point "dim2::Point<double>" or
   337   ///\ref dim2::Point "dim2::Point<int>" values.
   338   template<class X> GraphToEps<CoordsTraits<X> > coords(const X &x) {
   339     dontPrint=true;
   340     return GraphToEps<CoordsTraits<X> >(CoordsTraits<X>(*this,x));
   341   }
   342   template<class X> struct NodeSizesTraits : public T {
   343     const X &_nodeSizes;
   344     NodeSizesTraits(const T &t,const X &x) : T(t), _nodeSizes(x) {}
   345   };
   346   ///Sets the map of the node sizes
   347 
   348   ///Sets the map of the node sizes.
   349   ///\param x must be a node map with \c double (or convertible) values.
   350   template<class X> GraphToEps<NodeSizesTraits<X> > nodeSizes(const X &x)
   351   {
   352     dontPrint=true;
   353     return GraphToEps<NodeSizesTraits<X> >(NodeSizesTraits<X>(*this,x));
   354   }
   355   template<class X> struct NodeShapesTraits : public T {
   356     const X &_nodeShapes;
   357     NodeShapesTraits(const T &t,const X &x) : T(t), _nodeShapes(x) {}
   358   };
   359   ///Sets the map of the node shapes
   360 
   361   ///Sets the map of the node shapes.
   362   ///The available shape values
   363   ///can be found in \ref NodeShapes "enum NodeShapes".
   364   ///\param x must be a node map with \c int (or convertible) values.
   365   ///\sa NodeShapes
   366   template<class X> GraphToEps<NodeShapesTraits<X> > nodeShapes(const X &x)
   367   {
   368     dontPrint=true;
   369     return GraphToEps<NodeShapesTraits<X> >(NodeShapesTraits<X>(*this,x));
   370   }
   371   template<class X> struct NodeTextsTraits : public T {
   372     const X &_nodeTexts;
   373     NodeTextsTraits(const T &t,const X &x) : T(t), _nodeTexts(x) {}
   374   };
   375   ///Sets the text printed on the nodes
   376 
   377   ///Sets the text printed on the nodes.
   378   ///\param x must be a node map with type that can be pushed to a standard
   379   ///\c ostream.
   380   template<class X> GraphToEps<NodeTextsTraits<X> > nodeTexts(const X &x)
   381   {
   382     dontPrint=true;
   383     _showNodeText=true;
   384     return GraphToEps<NodeTextsTraits<X> >(NodeTextsTraits<X>(*this,x));
   385   }
   386   template<class X> struct NodePsTextsTraits : public T {
   387     const X &_nodePsTexts;
   388     NodePsTextsTraits(const T &t,const X &x) : T(t), _nodePsTexts(x) {}
   389   };
   390   ///Inserts a PostScript block to the nodes
   391 
   392   ///With this command it is possible to insert a verbatim PostScript
   393   ///block to the nodes.
   394   ///The PS current point will be moved to the center of the node before
   395   ///the PostScript block inserted.
   396   ///
   397   ///Before and after the block a newline character is inserted so you
   398   ///don't have to bother with the separators.
   399   ///
   400   ///\param x must be a node map with type that can be pushed to a standard
   401   ///\c ostream.
   402   ///
   403   ///\sa nodePsTextsPreamble()
   404   template<class X> GraphToEps<NodePsTextsTraits<X> > nodePsTexts(const X &x)
   405   {
   406     dontPrint=true;
   407     _showNodePsText=true;
   408     return GraphToEps<NodePsTextsTraits<X> >(NodePsTextsTraits<X>(*this,x));
   409   }
   410   template<class X> struct ArcWidthsTraits : public T {
   411     const X &_arcWidths;
   412     ArcWidthsTraits(const T &t,const X &x) : T(t), _arcWidths(x) {}
   413   };
   414   ///Sets the map of the arc widths
   415 
   416   ///Sets the map of the arc widths.
   417   ///\param x must be an arc map with \c double (or convertible) values.
   418   template<class X> GraphToEps<ArcWidthsTraits<X> > arcWidths(const X &x)
   419   {
   420     dontPrint=true;
   421     return GraphToEps<ArcWidthsTraits<X> >(ArcWidthsTraits<X>(*this,x));
   422   }
   423 
   424   template<class X> struct NodeColorsTraits : public T {
   425     const X &_nodeColors;
   426     NodeColorsTraits(const T &t,const X &x) : T(t), _nodeColors(x) {}
   427   };
   428   ///Sets the map of the node colors
   429 
   430   ///Sets the map of the node colors.
   431   ///\param x must be a node map with \ref Color values.
   432   ///
   433   ///\sa Palette
   434   template<class X> GraphToEps<NodeColorsTraits<X> >
   435   nodeColors(const X &x)
   436   {
   437     dontPrint=true;
   438     return GraphToEps<NodeColorsTraits<X> >(NodeColorsTraits<X>(*this,x));
   439   }
   440   template<class X> struct NodeTextColorsTraits : public T {
   441     const X &_nodeTextColors;
   442     NodeTextColorsTraits(const T &t,const X &x) : T(t), _nodeTextColors(x) {}
   443   };
   444   ///Sets the map of the node text colors
   445 
   446   ///Sets the map of the node text colors.
   447   ///\param x must be a node map with \ref Color values.
   448   ///
   449   ///\sa Palette
   450   template<class X> GraphToEps<NodeTextColorsTraits<X> >
   451   nodeTextColors(const X &x)
   452   {
   453     dontPrint=true;
   454     _nodeTextColorType=CUST_COL;
   455     return GraphToEps<NodeTextColorsTraits<X> >
   456       (NodeTextColorsTraits<X>(*this,x));
   457   }
   458   template<class X> struct ArcColorsTraits : public T {
   459     const X &_arcColors;
   460     ArcColorsTraits(const T &t,const X &x) : T(t), _arcColors(x) {}
   461   };
   462   ///Sets the map of the arc colors
   463 
   464   ///Sets the map of the arc colors.
   465   ///\param x must be an arc map with \ref Color values.
   466   ///
   467   ///\sa Palette
   468   template<class X> GraphToEps<ArcColorsTraits<X> >
   469   arcColors(const X &x)
   470   {
   471     dontPrint=true;
   472     return GraphToEps<ArcColorsTraits<X> >(ArcColorsTraits<X>(*this,x));
   473   }
   474   ///Sets a global scale factor for node sizes
   475 
   476   ///Sets a global scale factor for node sizes.
   477   ///
   478   /// If nodeSizes() is not given, this function simply sets the node
   479   /// sizes to \c d.  If nodeSizes() is given, but
   480   /// autoNodeScale() is not, then the node size given by
   481   /// nodeSizes() will be multiplied by the value \c d.
   482   /// If both nodeSizes() and autoNodeScale() are used, then the
   483   /// node sizes will be scaled in such a way that the greatest size will be
   484   /// equal to \c d.
   485   /// \sa nodeSizes()
   486   /// \sa autoNodeScale()
   487   GraphToEps<T> &nodeScale(double d=.01) {_nodeScale=d;return *this;}
   488   ///Turns on/off the automatic node size scaling.
   489 
   490   ///Turns on/off the automatic node size scaling.
   491   ///
   492   ///\sa nodeScale()
   493   ///
   494   GraphToEps<T> &autoNodeScale(bool b=true) {
   495     _autoNodeScale=b;return *this;
   496   }
   497 
   498   ///Turns on/off the absolutematic node size scaling.
   499 
   500   ///Turns on/off the absolutematic node size scaling.
   501   ///
   502   ///\sa nodeScale()
   503   ///
   504   GraphToEps<T> &absoluteNodeSizes(bool b=true) {
   505     _absoluteNodeSizes=b;return *this;
   506   }
   507 
   508   ///Negates the Y coordinates.
   509   GraphToEps<T> &negateY(bool b=true) {
   510     _negY=b;return *this;
   511   }
   512 
   513   ///Turn on/off pre-scaling
   514 
   515   ///By default graphToEps() rescales the whole image in order to avoid
   516   ///very big or very small bounding boxes.
   517   ///
   518   ///This (p)rescaling can be turned off with this function.
   519   ///
   520   GraphToEps<T> &preScale(bool b=true) {
   521     _preScale=b;return *this;
   522   }
   523 
   524   ///Sets a global scale factor for arc widths
   525 
   526   /// Sets a global scale factor for arc widths.
   527   ///
   528   /// If arcWidths() is not given, this function simply sets the arc
   529   /// widths to \c d.  If arcWidths() is given, but
   530   /// autoArcWidthScale() is not, then the arc withs given by
   531   /// arcWidths() will be multiplied by the value \c d.
   532   /// If both arcWidths() and autoArcWidthScale() are used, then the
   533   /// arc withs will be scaled in such a way that the greatest width will be
   534   /// equal to \c d.
   535   GraphToEps<T> &arcWidthScale(double d=.003) {_arcWidthScale=d;return *this;}
   536   ///Turns on/off the automatic arc width scaling.
   537 
   538   ///Turns on/off the automatic arc width scaling.
   539   ///
   540   ///\sa arcWidthScale()
   541   ///
   542   GraphToEps<T> &autoArcWidthScale(bool b=true) {
   543     _autoArcWidthScale=b;return *this;
   544   }
   545   ///Turns on/off the absolutematic arc width scaling.
   546 
   547   ///Turns on/off the absolutematic arc width scaling.
   548   ///
   549   ///\sa arcWidthScale()
   550   ///
   551   GraphToEps<T> &absoluteArcWidths(bool b=true) {
   552     _absoluteArcWidths=b;return *this;
   553   }
   554   ///Sets a global scale factor for the whole picture
   555   GraphToEps<T> &scale(double d) {_scale=d;return *this;}
   556   ///Sets the width of the border around the picture
   557   GraphToEps<T> &border(double b=10) {_xBorder=_yBorder=b;return *this;}
   558   ///Sets the width of the border around the picture
   559   GraphToEps<T> &border(double x, double y) {
   560     _xBorder=x;_yBorder=y;return *this;
   561   }
   562   ///Sets whether to draw arrows
   563   GraphToEps<T> &drawArrows(bool b=true) {_drawArrows=b;return *this;}
   564   ///Sets the length of the arrowheads
   565   GraphToEps<T> &arrowLength(double d=1.0) {_arrowLength*=d;return *this;}
   566   ///Sets the width of the arrowheads
   567   GraphToEps<T> &arrowWidth(double d=.3) {_arrowWidth*=d;return *this;}
   568 
   569   ///Scales the drawing to fit to A4 page
   570   GraphToEps<T> &scaleToA4() {_scaleToA4=true;return *this;}
   571 
   572   ///Enables parallel arcs
   573   GraphToEps<T> &enableParallel(bool b=true) {_enableParallel=b;return *this;}
   574 
   575   ///Sets the distance between parallel arcs
   576   GraphToEps<T> &parArcDist(double d) {_parArcDist*=d;return *this;}
   577 
   578   ///Hides the arcs
   579   GraphToEps<T> &hideArcs(bool b=true) {_showArcs=!b;return *this;}
   580   ///Hides the nodes
   581   GraphToEps<T> &hideNodes(bool b=true) {_showNodes=!b;return *this;}
   582 
   583   ///Sets the size of the node texts
   584   GraphToEps<T> &nodeTextSize(double d) {_nodeTextSize=d;return *this;}
   585 
   586   ///Sets the color of the node texts to be different from the node color
   587 
   588   ///Sets the color of the node texts to be as different from the node color
   589   ///as it is possible.
   590   GraphToEps<T> &distantColorNodeTexts()
   591   {_nodeTextColorType=DIST_COL;return *this;}
   592   ///Sets the color of the node texts to be black or white and always visible.
   593 
   594   ///Sets the color of the node texts to be black or white according to
   595   ///which is more different from the node color.
   596   GraphToEps<T> &distantBWNodeTexts()
   597   {_nodeTextColorType=DIST_BW;return *this;}
   598 
   599   ///Gives a preamble block for node Postscript block.
   600 
   601   ///Gives a preamble block for node Postscript block.
   602   ///
   603   ///\sa nodePsTexts()
   604   GraphToEps<T> & nodePsTextsPreamble(const char *str) {
   605     _nodePsTextsPreamble=str ;return *this;
   606   }
   607   ///Sets whether the graph is undirected
   608 
   609   ///Sets whether the graph is undirected.
   610   ///
   611   ///This setting is the default for undirected graphs.
   612   ///
   613   ///\sa directed()
   614    GraphToEps<T> &undirected(bool b=true) {_undirected=b;return *this;}
   615 
   616   ///Sets whether the graph is directed
   617 
   618   ///Sets whether the graph is directed.
   619   ///Use it to show the edges as a pair of directed ones.
   620   ///
   621   ///This setting is the default for digraphs.
   622   ///
   623   ///\sa undirected()
   624   GraphToEps<T> &directed(bool b=true) {_undirected=!b;return *this;}
   625 
   626   ///Sets the title.
   627 
   628   ///Sets the title of the generated image,
   629   ///namely it inserts a <tt>%%Title:</tt> DSC field to the header of
   630   ///the EPS file.
   631   GraphToEps<T> &title(const std::string &t) {_title=t;return *this;}
   632   ///Sets the copyright statement.
   633 
   634   ///Sets the copyright statement of the generated image,
   635   ///namely it inserts a <tt>%%Copyright:</tt> DSC field to the header of
   636   ///the EPS file.
   637   GraphToEps<T> &copyright(const std::string &t) {_copyright=t;return *this;}
   638 
   639 protected:
   640   bool isInsideNode(dim2::Point<double> p, double r,int t)
   641   {
   642     switch(t) {
   643     case CIRCLE:
   644     case MALE:
   645     case FEMALE:
   646       return p.normSquare()<=r*r;
   647     case SQUARE:
   648       return p.x<=r&&p.x>=-r&&p.y<=r&&p.y>=-r;
   649     case DIAMOND:
   650       return p.x+p.y<=r && p.x-p.y<=r && -p.x+p.y<=r && -p.x-p.y<=r;
   651     }
   652     return false;
   653   }
   654 
   655 public:
   656   ~GraphToEps() { }
   657 
   658   ///Draws the graph.
   659 
   660   ///Like other functions using
   661   ///\ref named-templ-func-param "named template parameters",
   662   ///this function calls the algorithm itself, i.e. in this case
   663   ///it draws the graph.
   664   void run() {
   665     const double EPSILON=1e-9;
   666     if(dontPrint) return;
   667 
   668     _graph_to_eps_bits::_NegY<typename T::CoordsMapType>
   669       mycoords(_coords,_negY);
   670 
   671     os << "%!PS-Adobe-2.0 EPSF-2.0\n";
   672     if(_title.size()>0) os << "%%Title: " << _title << '\n';
   673      if(_copyright.size()>0) os << "%%Copyright: " << _copyright << '\n';
   674     os << "%%Creator: LEMON, graphToEps()\n";
   675 
   676     {
   677       os << "%%CreationDate: ";
   678 #ifndef WIN32
   679       timeval tv;
   680       gettimeofday(&tv, 0);
   681 
   682       char cbuf[26];
   683       ctime_r(&tv.tv_sec,cbuf);
   684       os << cbuf;
   685 #else
   686       os << bits::getWinFormattedDate();
   687       os << std::endl;
   688 #endif
   689     }
   690 
   691     if (_autoArcWidthScale) {
   692       double max_w=0;
   693       for(ArcIt e(g);e!=INVALID;++e)
   694         max_w=std::max(double(_arcWidths[e]),max_w);
   695       if(max_w>EPSILON) {
   696         _arcWidthScale/=max_w;
   697       }
   698     }
   699 
   700     if (_autoNodeScale) {
   701       double max_s=0;
   702       for(NodeIt n(g);n!=INVALID;++n)
   703         max_s=std::max(double(_nodeSizes[n]),max_s);
   704       if(max_s>EPSILON) {
   705         _nodeScale/=max_s;
   706       }
   707     }
   708 
   709     double diag_len = 1;
   710     if(!(_absoluteNodeSizes&&_absoluteArcWidths)) {
   711       dim2::Box<double> bb;
   712       for(NodeIt n(g);n!=INVALID;++n) bb.add(mycoords[n]);
   713       if (bb.empty()) {
   714         bb = dim2::Box<double>(dim2::Point<double>(0,0));
   715       }
   716       diag_len = std::sqrt((bb.bottomLeft()-bb.topRight()).normSquare());
   717       if(diag_len<EPSILON) diag_len = 1;
   718       if(!_absoluteNodeSizes) _nodeScale*=diag_len;
   719       if(!_absoluteArcWidths) _arcWidthScale*=diag_len;
   720     }
   721 
   722     dim2::Box<double> bb;
   723     for(NodeIt n(g);n!=INVALID;++n) {
   724       double ns=_nodeSizes[n]*_nodeScale;
   725       dim2::Point<double> p(ns,ns);
   726       switch(_nodeShapes[n]) {
   727       case CIRCLE:
   728       case SQUARE:
   729       case DIAMOND:
   730         bb.add(p+mycoords[n]);
   731         bb.add(-p+mycoords[n]);
   732         break;
   733       case MALE:
   734         bb.add(-p+mycoords[n]);
   735         bb.add(dim2::Point<double>(1.5*ns,1.5*std::sqrt(3.0)*ns)+mycoords[n]);
   736         break;
   737       case FEMALE:
   738         bb.add(p+mycoords[n]);
   739         bb.add(dim2::Point<double>(-ns,-3.01*ns)+mycoords[n]);
   740         break;
   741       }
   742     }
   743     if (bb.empty()) {
   744       bb = dim2::Box<double>(dim2::Point<double>(0,0));
   745     }
   746 
   747     if(_scaleToA4)
   748       os <<"%%BoundingBox: 0 0 596 842\n%%DocumentPaperSizes: a4\n";
   749     else {
   750       if(_preScale) {
   751         //Rescale so that BoundingBox won't be neither to big nor too small.
   752         while(bb.height()*_scale>1000||bb.width()*_scale>1000) _scale/=10;
   753         while(bb.height()*_scale<100||bb.width()*_scale<100) _scale*=10;
   754       }
   755 
   756       os << "%%BoundingBox: "
   757          << int(floor(bb.left()   * _scale - _xBorder)) << ' '
   758          << int(floor(bb.bottom() * _scale - _yBorder)) << ' '
   759          << int(ceil(bb.right()  * _scale + _xBorder)) << ' '
   760          << int(ceil(bb.top()    * _scale + _yBorder)) << '\n';
   761     }
   762 
   763     os << "%%EndComments\n";
   764 
   765     //x1 y1 x2 y2 x3 y3 cr cg cb w
   766     os << "/lb { setlinewidth setrgbcolor newpath moveto\n"
   767        << "      4 2 roll 1 index 1 index curveto stroke } bind def\n";
   768     os << "/l { setlinewidth setrgbcolor newpath moveto lineto stroke }"
   769        << " bind def\n";
   770     //x y r
   771     os << "/c { newpath dup 3 index add 2 index moveto 0 360 arc closepath }"
   772        << " bind def\n";
   773     //x y r
   774     os << "/sq { newpath 2 index 1 index add 2 index 2 index add moveto\n"
   775        << "      2 index 1 index sub 2 index 2 index add lineto\n"
   776        << "      2 index 1 index sub 2 index 2 index sub lineto\n"
   777        << "      2 index 1 index add 2 index 2 index sub lineto\n"
   778        << "      closepath pop pop pop} bind def\n";
   779     //x y r
   780     os << "/di { newpath 2 index 1 index add 2 index moveto\n"
   781        << "      2 index             2 index 2 index add lineto\n"
   782        << "      2 index 1 index sub 2 index             lineto\n"
   783        << "      2 index             2 index 2 index sub lineto\n"
   784        << "      closepath pop pop pop} bind def\n";
   785     // x y r cr cg cb
   786     os << "/nc { 0 0 0 setrgbcolor 5 index 5 index 5 index c fill\n"
   787        << "     setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
   788        << "   } bind def\n";
   789     os << "/nsq { 0 0 0 setrgbcolor 5 index 5 index 5 index sq fill\n"
   790        << "     setrgbcolor " << 1+_nodeBorderQuotient << " div sq fill\n"
   791        << "   } bind def\n";
   792     os << "/ndi { 0 0 0 setrgbcolor 5 index 5 index 5 index di fill\n"
   793        << "     setrgbcolor " << 1+_nodeBorderQuotient << " div di fill\n"
   794        << "   } bind def\n";
   795     os << "/nfemale { 0 0 0 setrgbcolor 3 index "
   796        << _nodeBorderQuotient/(1+_nodeBorderQuotient)
   797        << " 1.5 mul mul setlinewidth\n"
   798        << "  newpath 5 index 5 index moveto "
   799        << "5 index 5 index 5 index 3.01 mul sub\n"
   800        << "  lineto 5 index 4 index .7 mul sub 5 index 5 index 2.2 mul sub"
   801        << " moveto\n"
   802        << "  5 index 4 index .7 mul add 5 index 5 index 2.2 mul sub lineto "
   803        << "stroke\n"
   804        << "  5 index 5 index 5 index c fill\n"
   805        << "  setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
   806        << "  } bind def\n";
   807     os << "/nmale {\n"
   808        << "  0 0 0 setrgbcolor 3 index "
   809        << _nodeBorderQuotient/(1+_nodeBorderQuotient)
   810        <<" 1.5 mul mul setlinewidth\n"
   811        << "  newpath 5 index 5 index moveto\n"
   812        << "  5 index 4 index 1 mul 1.5 mul add\n"
   813        << "  5 index 5 index 3 sqrt 1.5 mul mul add\n"
   814        << "  1 index 1 index lineto\n"
   815        << "  1 index 1 index 7 index sub moveto\n"
   816        << "  1 index 1 index lineto\n"
   817        << "  exch 5 index 3 sqrt .5 mul mul sub exch 5 index .5 mul sub"
   818        << " lineto\n"
   819        << "  stroke\n"
   820        << "  5 index 5 index 5 index c fill\n"
   821        << "  setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
   822        << "  } bind def\n";
   823 
   824 
   825     os << "/arrl " << _arrowLength << " def\n";
   826     os << "/arrw " << _arrowWidth << " def\n";
   827     // l dx_norm dy_norm
   828     os << "/lrl { 2 index mul exch 2 index mul exch rlineto pop} bind def\n";
   829     //len w dx_norm dy_norm x1 y1 cr cg cb
   830     os << "/arr { setrgbcolor /y1 exch def /x1 exch def /dy exch def /dx "
   831        << "exch def\n"
   832        << "       /w exch def /len exch def\n"
   833       //<< "0.1 setlinewidth x1 y1 moveto dx len mul dy len mul rlineto stroke"
   834        << "       newpath x1 dy w 2 div mul add y1 dx w 2 div mul sub moveto\n"
   835        << "       len w sub arrl sub dx dy lrl\n"
   836        << "       arrw dy dx neg lrl\n"
   837        << "       dx arrl w add mul dy w 2 div arrw add mul sub\n"
   838        << "       dy arrl w add mul dx w 2 div arrw add mul add rlineto\n"
   839        << "       dx arrl w add mul neg dy w 2 div arrw add mul sub\n"
   840        << "       dy arrl w add mul neg dx w 2 div arrw add mul add rlineto\n"
   841        << "       arrw dy dx neg lrl\n"
   842        << "       len w sub arrl sub neg dx dy lrl\n"
   843        << "       closepath fill } bind def\n";
   844     os << "/cshow { 2 index 2 index moveto dup stringwidth pop\n"
   845        << "         neg 2 div fosi .35 mul neg rmoveto show pop pop} def\n";
   846 
   847     os << "\ngsave\n";
   848     if(_scaleToA4)
   849       if(bb.height()>bb.width()) {
   850         double sc= std::min((A4HEIGHT-2*A4BORDER)/bb.height(),
   851                   (A4WIDTH-2*A4BORDER)/bb.width());
   852         os << ((A4WIDTH -2*A4BORDER)-sc*bb.width())/2 + A4BORDER << ' '
   853            << ((A4HEIGHT-2*A4BORDER)-sc*bb.height())/2 + A4BORDER
   854            << " translate\n"
   855            << sc << " dup scale\n"
   856            << -bb.left() << ' ' << -bb.bottom() << " translate\n";
   857       }
   858       else {
   859         double sc= std::min((A4HEIGHT-2*A4BORDER)/bb.width(),
   860                   (A4WIDTH-2*A4BORDER)/bb.height());
   861         os << ((A4WIDTH -2*A4BORDER)-sc*bb.height())/2 + A4BORDER << ' '
   862            << ((A4HEIGHT-2*A4BORDER)-sc*bb.width())/2 + A4BORDER
   863            << " translate\n"
   864            << sc << " dup scale\n90 rotate\n"
   865            << -bb.left() << ' ' << -bb.top() << " translate\n";
   866         }
   867     else if(_scale!=1.0) os << _scale << " dup scale\n";
   868 
   869     if(_showArcs) {
   870       os << "%Arcs:\ngsave\n";
   871       if(_enableParallel) {
   872         std::vector<Arc> el;
   873         for(ArcIt e(g);e!=INVALID;++e)
   874           if((!_undirected||g.source(e)<g.target(e))&&_arcWidths[e]>0
   875              &&g.source(e)!=g.target(e))
   876             el.push_back(e);
   877         std::sort(el.begin(),el.end(),arcLess(g));
   878 
   879         typename std::vector<Arc>::iterator j;
   880         for(typename std::vector<Arc>::iterator i=el.begin();i!=el.end();i=j) {
   881           for(j=i+1;j!=el.end()&&isParallel(*i,*j);++j) ;
   882 
   883           double sw=0;
   884           for(typename std::vector<Arc>::iterator e=i;e!=j;++e)
   885             sw+=_arcWidths[*e]*_arcWidthScale+_parArcDist;
   886           sw-=_parArcDist;
   887           sw/=-2.0;
   888           dim2::Point<double>
   889             dvec(mycoords[g.target(*i)]-mycoords[g.source(*i)]);
   890           double l=std::sqrt(dvec.normSquare());
   891           dim2::Point<double> d(dvec/std::max(l,EPSILON));
   892           dim2::Point<double> m;
   893 //           m=dim2::Point<double>(mycoords[g.target(*i)]+
   894 //                                 mycoords[g.source(*i)])/2.0;
   895 
   896 //            m=dim2::Point<double>(mycoords[g.source(*i)])+
   897 //             dvec*(double(_nodeSizes[g.source(*i)])/
   898 //                (_nodeSizes[g.source(*i)]+_nodeSizes[g.target(*i)]));
   899 
   900           m=dim2::Point<double>(mycoords[g.source(*i)])+
   901             d*(l+_nodeSizes[g.source(*i)]-_nodeSizes[g.target(*i)])/2.0;
   902 
   903           for(typename std::vector<Arc>::iterator e=i;e!=j;++e) {
   904             sw+=_arcWidths[*e]*_arcWidthScale/2.0;
   905             dim2::Point<double> mm=m+rot90(d)*sw/.75;
   906             if(_drawArrows) {
   907               int node_shape;
   908               dim2::Point<double> s=mycoords[g.source(*e)];
   909               dim2::Point<double> t=mycoords[g.target(*e)];
   910               double rn=_nodeSizes[g.target(*e)]*_nodeScale;
   911               node_shape=_nodeShapes[g.target(*e)];
   912               dim2::Bezier3 bez(s,mm,mm,t);
   913               double t1=0,t2=1;
   914               for(int ii=0;ii<INTERPOL_PREC;++ii)
   915                 if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape)) t2=(t1+t2)/2;
   916                 else t1=(t1+t2)/2;
   917               dim2::Point<double> apoint=bez((t1+t2)/2);
   918               rn = _arrowLength+_arcWidths[*e]*_arcWidthScale;
   919               rn*=rn;
   920               t2=(t1+t2)/2;t1=0;
   921               for(int ii=0;ii<INTERPOL_PREC;++ii)
   922                 if((bez((t1+t2)/2)-apoint).normSquare()>rn) t1=(t1+t2)/2;
   923                 else t2=(t1+t2)/2;
   924               dim2::Point<double> linend=bez((t1+t2)/2);
   925               bez=bez.before((t1+t2)/2);
   926 //               rn=_nodeSizes[g.source(*e)]*_nodeScale;
   927 //               node_shape=_nodeShapes[g.source(*e)];
   928 //               t1=0;t2=1;
   929 //               for(int i=0;i<INTERPOL_PREC;++i)
   930 //                 if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape))
   931 //                   t1=(t1+t2)/2;
   932 //                 else t2=(t1+t2)/2;
   933 //               bez=bez.after((t1+t2)/2);
   934               os << _arcWidths[*e]*_arcWidthScale << " setlinewidth "
   935                  << _arcColors[*e].red() << ' '
   936                  << _arcColors[*e].green() << ' '
   937                  << _arcColors[*e].blue() << " setrgbcolor newpath\n"
   938                  << bez.p1.x << ' ' <<  bez.p1.y << " moveto\n"
   939                  << bez.p2.x << ' ' << bez.p2.y << ' '
   940                  << bez.p3.x << ' ' << bez.p3.y << ' '
   941                  << bez.p4.x << ' ' << bez.p4.y << " curveto stroke\n";
   942               dim2::Point<double> dd(rot90(linend-apoint));
   943               dd*=(.5*_arcWidths[*e]*_arcWidthScale+_arrowWidth)/
   944                 std::sqrt(dd.normSquare());
   945               os << "newpath " << psOut(apoint) << " moveto "
   946                  << psOut(linend+dd) << " lineto "
   947                  << psOut(linend-dd) << " lineto closepath fill\n";
   948             }
   949             else {
   950               os << mycoords[g.source(*e)].x << ' '
   951                  << mycoords[g.source(*e)].y << ' '
   952                  << mm.x << ' ' << mm.y << ' '
   953                  << mycoords[g.target(*e)].x << ' '
   954                  << mycoords[g.target(*e)].y << ' '
   955                  << _arcColors[*e].red() << ' '
   956                  << _arcColors[*e].green() << ' '
   957                  << _arcColors[*e].blue() << ' '
   958                  << _arcWidths[*e]*_arcWidthScale << " lb\n";
   959             }
   960             sw+=_arcWidths[*e]*_arcWidthScale/2.0+_parArcDist;
   961           }
   962         }
   963       }
   964       else for(ArcIt e(g);e!=INVALID;++e)
   965         if((!_undirected||g.source(e)<g.target(e))&&_arcWidths[e]>0
   966            &&g.source(e)!=g.target(e)) {
   967           if(_drawArrows) {
   968             dim2::Point<double> d(mycoords[g.target(e)]-mycoords[g.source(e)]);
   969             double rn=_nodeSizes[g.target(e)]*_nodeScale;
   970             int node_shape=_nodeShapes[g.target(e)];
   971             double t1=0,t2=1;
   972             for(int i=0;i<INTERPOL_PREC;++i)
   973               if(isInsideNode((-(t1+t2)/2)*d,rn,node_shape)) t1=(t1+t2)/2;
   974               else t2=(t1+t2)/2;
   975             double l=std::sqrt(d.normSquare());
   976             d/=l;
   977 
   978             os << l*(1-(t1+t2)/2) << ' '
   979                << _arcWidths[e]*_arcWidthScale << ' '
   980                << d.x << ' ' << d.y << ' '
   981                << mycoords[g.source(e)].x << ' '
   982                << mycoords[g.source(e)].y << ' '
   983                << _arcColors[e].red() << ' '
   984                << _arcColors[e].green() << ' '
   985                << _arcColors[e].blue() << " arr\n";
   986           }
   987           else os << mycoords[g.source(e)].x << ' '
   988                   << mycoords[g.source(e)].y << ' '
   989                   << mycoords[g.target(e)].x << ' '
   990                   << mycoords[g.target(e)].y << ' '
   991                   << _arcColors[e].red() << ' '
   992                   << _arcColors[e].green() << ' '
   993                   << _arcColors[e].blue() << ' '
   994                   << _arcWidths[e]*_arcWidthScale << " l\n";
   995         }
   996       os << "grestore\n";
   997     }
   998     if(_showNodes) {
   999       os << "%Nodes:\ngsave\n";
  1000       for(NodeIt n(g);n!=INVALID;++n) {
  1001         os << mycoords[n].x << ' ' << mycoords[n].y << ' '
  1002            << _nodeSizes[n]*_nodeScale << ' '
  1003            << _nodeColors[n].red() << ' '
  1004            << _nodeColors[n].green() << ' '
  1005            << _nodeColors[n].blue() << ' ';
  1006         switch(_nodeShapes[n]) {
  1007         case CIRCLE:
  1008           os<< "nc";break;
  1009         case SQUARE:
  1010           os<< "nsq";break;
  1011         case DIAMOND:
  1012           os<< "ndi";break;
  1013         case MALE:
  1014           os<< "nmale";break;
  1015         case FEMALE:
  1016           os<< "nfemale";break;
  1017         }
  1018         os<<'\n';
  1019       }
  1020       os << "grestore\n";
  1021     }
  1022     if(_showNodeText) {
  1023       os << "%Node texts:\ngsave\n";
  1024       os << "/fosi " << _nodeTextSize << " def\n";
  1025       os << "(Helvetica) findfont fosi scalefont setfont\n";
  1026       for(NodeIt n(g);n!=INVALID;++n) {
  1027         switch(_nodeTextColorType) {
  1028         case DIST_COL:
  1029           os << psOut(distantColor(_nodeColors[n])) << " setrgbcolor\n";
  1030           break;
  1031         case DIST_BW:
  1032           os << psOut(distantBW(_nodeColors[n])) << " setrgbcolor\n";
  1033           break;
  1034         case CUST_COL:
  1035           os << psOut(distantColor(_nodeTextColors[n])) << " setrgbcolor\n";
  1036           break;
  1037         default:
  1038           os << "0 0 0 setrgbcolor\n";
  1039         }
  1040         os << mycoords[n].x << ' ' << mycoords[n].y
  1041            << " (" << _nodeTexts[n] << ") cshow\n";
  1042       }
  1043       os << "grestore\n";
  1044     }
  1045     if(_showNodePsText) {
  1046       os << "%Node PS blocks:\ngsave\n";
  1047       for(NodeIt n(g);n!=INVALID;++n)
  1048         os << mycoords[n].x << ' ' << mycoords[n].y
  1049            << " moveto\n" << _nodePsTexts[n] << "\n";
  1050       os << "grestore\n";
  1051     }
  1052 
  1053     os << "grestore\nshowpage\n";
  1054 
  1055     //CleanUp:
  1056     if(_pleaseRemoveOsStream) {delete &os;}
  1057   }
  1058 
  1059   ///\name Aliases
  1060   ///These are just some aliases to other parameter setting functions.
  1061 
  1062   ///@{
  1063 
  1064   ///An alias for arcWidths()
  1065   template<class X> GraphToEps<ArcWidthsTraits<X> > edgeWidths(const X &x)
  1066   {
  1067     return arcWidths(x);
  1068   }
  1069 
  1070   ///An alias for arcColors()
  1071   template<class X> GraphToEps<ArcColorsTraits<X> >
  1072   edgeColors(const X &x)
  1073   {
  1074     return arcColors(x);
  1075   }
  1076 
  1077   ///An alias for arcWidthScale()
  1078   GraphToEps<T> &edgeWidthScale(double d) {return arcWidthScale(d);}
  1079 
  1080   ///An alias for autoArcWidthScale()
  1081   GraphToEps<T> &autoEdgeWidthScale(bool b=true)
  1082   {
  1083     return autoArcWidthScale(b);
  1084   }
  1085 
  1086   ///An alias for absoluteArcWidths()
  1087   GraphToEps<T> &absoluteEdgeWidths(bool b=true)
  1088   {
  1089     return absoluteArcWidths(b);
  1090   }
  1091 
  1092   ///An alias for parArcDist()
  1093   GraphToEps<T> &parEdgeDist(double d) {return parArcDist(d);}
  1094 
  1095   ///An alias for hideArcs()
  1096   GraphToEps<T> &hideEdges(bool b=true) {return hideArcs(b);}
  1097 
  1098   ///@}
  1099 };
  1100 
  1101 template<class T>
  1102 const int GraphToEps<T>::INTERPOL_PREC = 20;
  1103 template<class T>
  1104 const double GraphToEps<T>::A4HEIGHT = 841.8897637795276;
  1105 template<class T>
  1106 const double GraphToEps<T>::A4WIDTH  = 595.275590551181;
  1107 template<class T>
  1108 const double GraphToEps<T>::A4BORDER = 15;
  1109 
  1110 
  1111 ///Generates an EPS file from a graph
  1112 
  1113 ///\ingroup eps_io
  1114 ///Generates an EPS file from a graph.
  1115 ///\param g Reference to the graph to be printed.
  1116 ///\param os Reference to the output stream.
  1117 ///By default it is <tt>std::cout</tt>.
  1118 ///
  1119 ///This function also has a lot of
  1120 ///\ref named-templ-func-param "named parameters",
  1121 ///they are declared as the members of class \ref GraphToEps. The following
  1122 ///example shows how to use these parameters.
  1123 ///\code
  1124 /// graphToEps(g,os).scale(10).coords(coords)
  1125 ///              .nodeScale(2).nodeSizes(sizes)
  1126 ///              .arcWidthScale(.4).run();
  1127 ///\endcode
  1128 ///
  1129 ///For more detailed examples see the \ref graph_to_eps_demo.cc demo file.
  1130 ///
  1131 ///\warning Don't forget to put the \ref GraphToEps::run() "run()"
  1132 ///to the end of the parameter list.
  1133 ///\sa GraphToEps
  1134 ///\sa graphToEps(GR &g, const char *file_name)
  1135 template<class GR>
  1136 GraphToEps<DefaultGraphToEpsTraits<GR> >
  1137 graphToEps(GR &g, std::ostream& os=std::cout)
  1138 {
  1139   return
  1140     GraphToEps<DefaultGraphToEpsTraits<GR> >(DefaultGraphToEpsTraits<GR>(g,os));
  1141 }
  1142 
  1143 ///Generates an EPS file from a graph
  1144 
  1145 ///\ingroup eps_io
  1146 ///This function does the same as
  1147 ///\ref graphToEps(GR &g,std::ostream& os)
  1148 ///but it writes its output into the file \c file_name
  1149 ///instead of a stream.
  1150 ///\sa graphToEps(GR &g, std::ostream& os)
  1151 template<class GR>
  1152 GraphToEps<DefaultGraphToEpsTraits<GR> >
  1153 graphToEps(GR &g,const char *file_name)
  1154 {
  1155   std::ostream* os = new std::ofstream(file_name);
  1156   if (!(*os)) {
  1157     delete os;
  1158     throw IoError("Cannot write file", file_name);
  1159   }
  1160   return GraphToEps<DefaultGraphToEpsTraits<GR> >
  1161     (DefaultGraphToEpsTraits<GR>(g,*os,true));
  1162 }
  1163 
  1164 ///Generates an EPS file from a graph
  1165 
  1166 ///\ingroup eps_io
  1167 ///This function does the same as
  1168 ///\ref graphToEps(GR &g,std::ostream& os)
  1169 ///but it writes its output into the file \c file_name
  1170 ///instead of a stream.
  1171 ///\sa graphToEps(GR &g, std::ostream& os)
  1172 template<class GR>
  1173 GraphToEps<DefaultGraphToEpsTraits<GR> >
  1174 graphToEps(GR &g,const std::string& file_name)
  1175 {
  1176   std::ostream* os = new std::ofstream(file_name.c_str());
  1177   if (!(*os)) {
  1178     delete os;
  1179     throw IoError("Cannot write file", file_name);
  1180   }
  1181   return GraphToEps<DefaultGraphToEpsTraits<GR> >
  1182     (DefaultGraphToEpsTraits<GR>(g,*os,true));
  1183 }
  1184 
  1185 } //END OF NAMESPACE LEMON
  1186 
  1187 #endif // LEMON_GRAPH_TO_EPS_H