lemon/graph_to_eps.h
author Akos Ladanyi <ladanyi@tmit.bme.hu>
Thu, 23 Apr 2009 07:30:40 +0100
changeset 621 b536eaacb39b
parent 559 c5fd2d996909
child 617 4137ef9aacc6
permissions -rw-r--r--
FindCOIN for CMake (#256)
     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) 2003-2009
     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 typename Graph::Node Node;
    73   typedef typename Graph::NodeIt NodeIt;
    74   typedef typename Graph::Arc Arc;
    75   typedef typename Graph::ArcIt ArcIt;
    76   typedef typename Graph::InArcIt InArcIt;
    77   typedef typename Graph::OutArcIt OutArcIt;
    78 
    79 
    80   const Graph &g;
    81 
    82   std::ostream& os;
    83 
    84   typedef ConstMap<typename Graph::Node,dim2::Point<double> > CoordsMapType;
    85   CoordsMapType _coords;
    86   ConstMap<typename Graph::Node,double > _nodeSizes;
    87   ConstMap<typename Graph::Node,int > _nodeShapes;
    88 
    89   ConstMap<typename Graph::Node,Color > _nodeColors;
    90   ConstMap<typename Graph::Arc,Color > _arcColors;
    91 
    92   ConstMap<typename Graph::Arc,double > _arcWidths;
    93 
    94   double _arcWidthScale;
    95 
    96   double _nodeScale;
    97   double _xBorder, _yBorder;
    98   double _scale;
    99   double _nodeBorderQuotient;
   100 
   101   bool _drawArrows;
   102   double _arrowLength, _arrowWidth;
   103 
   104   bool _showNodes, _showArcs;
   105 
   106   bool _enableParallel;
   107   double _parArcDist;
   108 
   109   bool _showNodeText;
   110   ConstMap<typename Graph::Node,bool > _nodeTexts;
   111   double _nodeTextSize;
   112 
   113   bool _showNodePsText;
   114   ConstMap<typename Graph::Node,bool > _nodePsTexts;
   115   char *_nodePsTextsPreamble;
   116 
   117   bool _undirected;
   118 
   119   bool _pleaseRemoveOsStream;
   120 
   121   bool _scaleToA4;
   122 
   123   std::string _title;
   124   std::string _copyright;
   125 
   126   enum NodeTextColorType
   127     { DIST_COL=0, DIST_BW=1, CUST_COL=2, SAME_COL=3 } _nodeTextColorType;
   128   ConstMap<typename Graph::Node,Color > _nodeTextColors;
   129 
   130   bool _autoNodeScale;
   131   bool _autoArcWidthScale;
   132 
   133   bool _absoluteNodeSizes;
   134   bool _absoluteArcWidths;
   135 
   136   bool _negY;
   137 
   138   bool _preScale;
   139   ///Constructor
   140 
   141   ///Constructor
   142   ///\param gr  Reference to the graph to be printed.
   143   ///\param ost Reference to the output stream.
   144   ///By default it is <tt>std::cout</tt>.
   145   ///\param pros If it is \c true, then the \c ostream referenced by \c os
   146   ///will be explicitly deallocated by the destructor.
   147   DefaultGraphToEpsTraits(const GR &gr, std::ostream& ost = std::cout,
   148                           bool pros = false) :
   149     g(gr), os(ost),
   150     _coords(dim2::Point<double>(1,1)), _nodeSizes(1), _nodeShapes(0),
   151     _nodeColors(WHITE), _arcColors(BLACK),
   152     _arcWidths(1.0), _arcWidthScale(0.003),
   153     _nodeScale(.01), _xBorder(10), _yBorder(10), _scale(1.0),
   154     _nodeBorderQuotient(.1),
   155     _drawArrows(false), _arrowLength(1), _arrowWidth(0.3),
   156     _showNodes(true), _showArcs(true),
   157     _enableParallel(false), _parArcDist(1),
   158     _showNodeText(false), _nodeTexts(false), _nodeTextSize(1),
   159     _showNodePsText(false), _nodePsTexts(false), _nodePsTextsPreamble(0),
   160     _undirected(lemon::UndirectedTagIndicator<GR>::value),
   161     _pleaseRemoveOsStream(pros), _scaleToA4(false),
   162     _nodeTextColorType(SAME_COL), _nodeTextColors(BLACK),
   163     _autoNodeScale(false),
   164     _autoArcWidthScale(false),
   165     _absoluteNodeSizes(false),
   166     _absoluteArcWidths(false),
   167     _negY(false),
   168     _preScale(true)
   169   {}
   170 };
   171 
   172 ///Auxiliary class to implement the named parameters of \ref graphToEps()
   173 
   174 ///Auxiliary class to implement the named parameters of \ref graphToEps().
   175 ///
   176 ///For detailed examples see the \ref graph_to_eps_demo.cc demo file.
   177 template<class T> class GraphToEps : public T
   178 {
   179   // Can't believe it is required by the C++ standard
   180   using T::g;
   181   using T::os;
   182 
   183   using T::_coords;
   184   using T::_nodeSizes;
   185   using T::_nodeShapes;
   186   using T::_nodeColors;
   187   using T::_arcColors;
   188   using T::_arcWidths;
   189 
   190   using T::_arcWidthScale;
   191   using T::_nodeScale;
   192   using T::_xBorder;
   193   using T::_yBorder;
   194   using T::_scale;
   195   using T::_nodeBorderQuotient;
   196 
   197   using T::_drawArrows;
   198   using T::_arrowLength;
   199   using T::_arrowWidth;
   200 
   201   using T::_showNodes;
   202   using T::_showArcs;
   203 
   204   using T::_enableParallel;
   205   using T::_parArcDist;
   206 
   207   using T::_showNodeText;
   208   using T::_nodeTexts;
   209   using T::_nodeTextSize;
   210 
   211   using T::_showNodePsText;
   212   using T::_nodePsTexts;
   213   using T::_nodePsTextsPreamble;
   214 
   215   using T::_undirected;
   216 
   217   using T::_pleaseRemoveOsStream;
   218 
   219   using T::_scaleToA4;
   220 
   221   using T::_title;
   222   using T::_copyright;
   223 
   224   using T::NodeTextColorType;
   225   using T::CUST_COL;
   226   using T::DIST_COL;
   227   using T::DIST_BW;
   228   using T::_nodeTextColorType;
   229   using T::_nodeTextColors;
   230 
   231   using T::_autoNodeScale;
   232   using T::_autoArcWidthScale;
   233 
   234   using T::_absoluteNodeSizes;
   235   using T::_absoluteArcWidths;
   236 
   237 
   238   using T::_negY;
   239   using T::_preScale;
   240 
   241   // dradnats ++C eht yb deriuqer si ti eveileb t'naC
   242 
   243   typedef typename T::Graph Graph;
   244   typedef typename Graph::Node Node;
   245   typedef typename Graph::NodeIt NodeIt;
   246   typedef typename Graph::Arc Arc;
   247   typedef typename Graph::ArcIt ArcIt;
   248   typedef typename Graph::InArcIt InArcIt;
   249   typedef typename Graph::OutArcIt OutArcIt;
   250 
   251   static const int INTERPOL_PREC;
   252   static const double A4HEIGHT;
   253   static const double A4WIDTH;
   254   static const double A4BORDER;
   255 
   256   bool dontPrint;
   257 
   258 public:
   259   ///Node shapes
   260 
   261   ///Node shapes.
   262   ///
   263   enum NodeShapes {
   264     /// = 0
   265     ///\image html nodeshape_0.png
   266     ///\image latex nodeshape_0.eps "CIRCLE shape (0)" width=2cm
   267     CIRCLE=0,
   268     /// = 1
   269     ///\image html nodeshape_1.png
   270     ///\image latex nodeshape_1.eps "SQUARE shape (1)" width=2cm
   271     SQUARE=1,
   272     /// = 2
   273     ///\image html nodeshape_2.png
   274     ///\image latex nodeshape_2.eps "DIAMOND shape (2)" width=2cm
   275     DIAMOND=2,
   276     /// = 3
   277     ///\image html nodeshape_3.png
   278     ///\image latex nodeshape_3.eps "MALE shape (3)" width=2cm
   279     MALE=3,
   280     /// = 4
   281     ///\image html nodeshape_4.png
   282     ///\image latex nodeshape_4.eps "FEMALE shape (4)" width=2cm
   283     FEMALE=4
   284   };
   285 
   286 private:
   287   class arcLess {
   288     const Graph &g;
   289   public:
   290     arcLess(const Graph &_g) : g(_g) {}
   291     bool operator()(Arc a,Arc b) const
   292     {
   293       Node ai=std::min(g.source(a),g.target(a));
   294       Node aa=std::max(g.source(a),g.target(a));
   295       Node bi=std::min(g.source(b),g.target(b));
   296       Node ba=std::max(g.source(b),g.target(b));
   297       return ai<bi ||
   298         (ai==bi && (aa < ba ||
   299                     (aa==ba && ai==g.source(a) && bi==g.target(b))));
   300     }
   301   };
   302   bool isParallel(Arc e,Arc f) const
   303   {
   304     return (g.source(e)==g.source(f)&&
   305             g.target(e)==g.target(f)) ||
   306       (g.source(e)==g.target(f)&&
   307        g.target(e)==g.source(f));
   308   }
   309   template<class TT>
   310   static std::string psOut(const dim2::Point<TT> &p)
   311     {
   312       std::ostringstream os;
   313       os << p.x << ' ' << p.y;
   314       return os.str();
   315     }
   316   static std::string psOut(const Color &c)
   317     {
   318       std::ostringstream os;
   319       os << c.red() << ' ' << c.green() << ' ' << c.blue();
   320       return os.str();
   321     }
   322 
   323 public:
   324   GraphToEps(const T &t) : T(t), dontPrint(false) {};
   325 
   326   template<class X> struct CoordsTraits : public T {
   327   typedef X CoordsMapType;
   328     const X &_coords;
   329     CoordsTraits(const T &t,const X &x) : T(t), _coords(x) {}
   330   };
   331   ///Sets the map of the node coordinates
   332 
   333   ///Sets the map of the node coordinates.
   334   ///\param x must be a node map with \ref dim2::Point "dim2::Point<double>" or
   335   ///\ref dim2::Point "dim2::Point<int>" values.
   336   template<class X> GraphToEps<CoordsTraits<X> > coords(const X &x) {
   337     dontPrint=true;
   338     return GraphToEps<CoordsTraits<X> >(CoordsTraits<X>(*this,x));
   339   }
   340   template<class X> struct NodeSizesTraits : public T {
   341     const X &_nodeSizes;
   342     NodeSizesTraits(const T &t,const X &x) : T(t), _nodeSizes(x) {}
   343   };
   344   ///Sets the map of the node sizes
   345 
   346   ///Sets the map of the node sizes.
   347   ///\param x must be a node map with \c double (or convertible) values.
   348   template<class X> GraphToEps<NodeSizesTraits<X> > nodeSizes(const X &x)
   349   {
   350     dontPrint=true;
   351     return GraphToEps<NodeSizesTraits<X> >(NodeSizesTraits<X>(*this,x));
   352   }
   353   template<class X> struct NodeShapesTraits : public T {
   354     const X &_nodeShapes;
   355     NodeShapesTraits(const T &t,const X &x) : T(t), _nodeShapes(x) {}
   356   };
   357   ///Sets the map of the node shapes
   358 
   359   ///Sets the map of the node shapes.
   360   ///The available shape values
   361   ///can be found in \ref NodeShapes "enum NodeShapes".
   362   ///\param x must be a node map with \c int (or convertible) values.
   363   ///\sa NodeShapes
   364   template<class X> GraphToEps<NodeShapesTraits<X> > nodeShapes(const X &x)
   365   {
   366     dontPrint=true;
   367     return GraphToEps<NodeShapesTraits<X> >(NodeShapesTraits<X>(*this,x));
   368   }
   369   template<class X> struct NodeTextsTraits : public T {
   370     const X &_nodeTexts;
   371     NodeTextsTraits(const T &t,const X &x) : T(t), _nodeTexts(x) {}
   372   };
   373   ///Sets the text printed on the nodes
   374 
   375   ///Sets the text printed on the nodes.
   376   ///\param x must be a node map with type that can be pushed to a standard
   377   ///\c ostream.
   378   template<class X> GraphToEps<NodeTextsTraits<X> > nodeTexts(const X &x)
   379   {
   380     dontPrint=true;
   381     _showNodeText=true;
   382     return GraphToEps<NodeTextsTraits<X> >(NodeTextsTraits<X>(*this,x));
   383   }
   384   template<class X> struct NodePsTextsTraits : public T {
   385     const X &_nodePsTexts;
   386     NodePsTextsTraits(const T &t,const X &x) : T(t), _nodePsTexts(x) {}
   387   };
   388   ///Inserts a PostScript block to the nodes
   389 
   390   ///With this command it is possible to insert a verbatim PostScript
   391   ///block to the nodes.
   392   ///The PS current point will be moved to the center of the node before
   393   ///the PostScript block inserted.
   394   ///
   395   ///Before and after the block a newline character is inserted so you
   396   ///don't have to bother with the separators.
   397   ///
   398   ///\param x must be a node map with type that can be pushed to a standard
   399   ///\c ostream.
   400   ///
   401   ///\sa nodePsTextsPreamble()
   402   template<class X> GraphToEps<NodePsTextsTraits<X> > nodePsTexts(const X &x)
   403   {
   404     dontPrint=true;
   405     _showNodePsText=true;
   406     return GraphToEps<NodePsTextsTraits<X> >(NodePsTextsTraits<X>(*this,x));
   407   }
   408   template<class X> struct ArcWidthsTraits : public T {
   409     const X &_arcWidths;
   410     ArcWidthsTraits(const T &t,const X &x) : T(t), _arcWidths(x) {}
   411   };
   412   ///Sets the map of the arc widths
   413 
   414   ///Sets the map of the arc widths.
   415   ///\param x must be an arc map with \c double (or convertible) values.
   416   template<class X> GraphToEps<ArcWidthsTraits<X> > arcWidths(const X &x)
   417   {
   418     dontPrint=true;
   419     return GraphToEps<ArcWidthsTraits<X> >(ArcWidthsTraits<X>(*this,x));
   420   }
   421 
   422   template<class X> struct NodeColorsTraits : public T {
   423     const X &_nodeColors;
   424     NodeColorsTraits(const T &t,const X &x) : T(t), _nodeColors(x) {}
   425   };
   426   ///Sets the map of the node colors
   427 
   428   ///Sets the map of the node colors.
   429   ///\param x must be a node map with \ref Color values.
   430   ///
   431   ///\sa Palette
   432   template<class X> GraphToEps<NodeColorsTraits<X> >
   433   nodeColors(const X &x)
   434   {
   435     dontPrint=true;
   436     return GraphToEps<NodeColorsTraits<X> >(NodeColorsTraits<X>(*this,x));
   437   }
   438   template<class X> struct NodeTextColorsTraits : public T {
   439     const X &_nodeTextColors;
   440     NodeTextColorsTraits(const T &t,const X &x) : T(t), _nodeTextColors(x) {}
   441   };
   442   ///Sets the map of the node text colors
   443 
   444   ///Sets the map of the node text colors.
   445   ///\param x must be a node map with \ref Color values.
   446   ///
   447   ///\sa Palette
   448   template<class X> GraphToEps<NodeTextColorsTraits<X> >
   449   nodeTextColors(const X &x)
   450   {
   451     dontPrint=true;
   452     _nodeTextColorType=CUST_COL;
   453     return GraphToEps<NodeTextColorsTraits<X> >
   454       (NodeTextColorsTraits<X>(*this,x));
   455   }
   456   template<class X> struct ArcColorsTraits : public T {
   457     const X &_arcColors;
   458     ArcColorsTraits(const T &t,const X &x) : T(t), _arcColors(x) {}
   459   };
   460   ///Sets the map of the arc colors
   461 
   462   ///Sets the map of the arc colors.
   463   ///\param x must be an arc map with \ref Color values.
   464   ///
   465   ///\sa Palette
   466   template<class X> GraphToEps<ArcColorsTraits<X> >
   467   arcColors(const X &x)
   468   {
   469     dontPrint=true;
   470     return GraphToEps<ArcColorsTraits<X> >(ArcColorsTraits<X>(*this,x));
   471   }
   472   ///Sets a global scale factor for node sizes
   473 
   474   ///Sets a global scale factor for node sizes.
   475   ///
   476   /// If nodeSizes() is not given, this function simply sets the node
   477   /// sizes to \c d.  If nodeSizes() is given, but
   478   /// autoNodeScale() is not, then the node size given by
   479   /// nodeSizes() will be multiplied by the value \c d.
   480   /// If both nodeSizes() and autoNodeScale() are used, then the
   481   /// node sizes will be scaled in such a way that the greatest size will be
   482   /// equal to \c d.
   483   /// \sa nodeSizes()
   484   /// \sa autoNodeScale()
   485   GraphToEps<T> &nodeScale(double d=.01) {_nodeScale=d;return *this;}
   486   ///Turns on/off the automatic node size scaling.
   487 
   488   ///Turns on/off the automatic node size scaling.
   489   ///
   490   ///\sa nodeScale()
   491   ///
   492   GraphToEps<T> &autoNodeScale(bool b=true) {
   493     _autoNodeScale=b;return *this;
   494   }
   495 
   496   ///Turns on/off the absolutematic node size scaling.
   497 
   498   ///Turns on/off the absolutematic node size scaling.
   499   ///
   500   ///\sa nodeScale()
   501   ///
   502   GraphToEps<T> &absoluteNodeSizes(bool b=true) {
   503     _absoluteNodeSizes=b;return *this;
   504   }
   505 
   506   ///Negates the Y coordinates.
   507   GraphToEps<T> &negateY(bool b=true) {
   508     _negY=b;return *this;
   509   }
   510 
   511   ///Turn on/off pre-scaling
   512 
   513   ///By default graphToEps() rescales the whole image in order to avoid
   514   ///very big or very small bounding boxes.
   515   ///
   516   ///This (p)rescaling can be turned off with this function.
   517   ///
   518   GraphToEps<T> &preScale(bool b=true) {
   519     _preScale=b;return *this;
   520   }
   521 
   522   ///Sets a global scale factor for arc widths
   523 
   524   /// Sets a global scale factor for arc widths.
   525   ///
   526   /// If arcWidths() is not given, this function simply sets the arc
   527   /// widths to \c d.  If arcWidths() is given, but
   528   /// autoArcWidthScale() is not, then the arc withs given by
   529   /// arcWidths() will be multiplied by the value \c d.
   530   /// If both arcWidths() and autoArcWidthScale() are used, then the
   531   /// arc withs will be scaled in such a way that the greatest width will be
   532   /// equal to \c d.
   533   GraphToEps<T> &arcWidthScale(double d=.003) {_arcWidthScale=d;return *this;}
   534   ///Turns on/off the automatic arc width scaling.
   535 
   536   ///Turns on/off the automatic arc width scaling.
   537   ///
   538   ///\sa arcWidthScale()
   539   ///
   540   GraphToEps<T> &autoArcWidthScale(bool b=true) {
   541     _autoArcWidthScale=b;return *this;
   542   }
   543   ///Turns on/off the absolutematic arc width scaling.
   544 
   545   ///Turns on/off the absolutematic arc width scaling.
   546   ///
   547   ///\sa arcWidthScale()
   548   ///
   549   GraphToEps<T> &absoluteArcWidths(bool b=true) {
   550     _absoluteArcWidths=b;return *this;
   551   }
   552   ///Sets a global scale factor for the whole picture
   553   GraphToEps<T> &scale(double d) {_scale=d;return *this;}
   554   ///Sets the width of the border around the picture
   555   GraphToEps<T> &border(double b=10) {_xBorder=_yBorder=b;return *this;}
   556   ///Sets the width of the border around the picture
   557   GraphToEps<T> &border(double x, double y) {
   558     _xBorder=x;_yBorder=y;return *this;
   559   }
   560   ///Sets whether to draw arrows
   561   GraphToEps<T> &drawArrows(bool b=true) {_drawArrows=b;return *this;}
   562   ///Sets the length of the arrowheads
   563   GraphToEps<T> &arrowLength(double d=1.0) {_arrowLength*=d;return *this;}
   564   ///Sets the width of the arrowheads
   565   GraphToEps<T> &arrowWidth(double d=.3) {_arrowWidth*=d;return *this;}
   566 
   567   ///Scales the drawing to fit to A4 page
   568   GraphToEps<T> &scaleToA4() {_scaleToA4=true;return *this;}
   569 
   570   ///Enables parallel arcs
   571   GraphToEps<T> &enableParallel(bool b=true) {_enableParallel=b;return *this;}
   572 
   573   ///Sets the distance between parallel arcs
   574   GraphToEps<T> &parArcDist(double d) {_parArcDist*=d;return *this;}
   575 
   576   ///Hides the arcs
   577   GraphToEps<T> &hideArcs(bool b=true) {_showArcs=!b;return *this;}
   578   ///Hides the nodes
   579   GraphToEps<T> &hideNodes(bool b=true) {_showNodes=!b;return *this;}
   580 
   581   ///Sets the size of the node texts
   582   GraphToEps<T> &nodeTextSize(double d) {_nodeTextSize=d;return *this;}
   583 
   584   ///Sets the color of the node texts to be different from the node color
   585 
   586   ///Sets the color of the node texts to be as different from the node color
   587   ///as it is possible.
   588   GraphToEps<T> &distantColorNodeTexts()
   589   {_nodeTextColorType=DIST_COL;return *this;}
   590   ///Sets the color of the node texts to be black or white and always visible.
   591 
   592   ///Sets the color of the node texts to be black or white according to
   593   ///which is more different from the node color.
   594   GraphToEps<T> &distantBWNodeTexts()
   595   {_nodeTextColorType=DIST_BW;return *this;}
   596 
   597   ///Gives a preamble block for node Postscript block.
   598 
   599   ///Gives a preamble block for node Postscript block.
   600   ///
   601   ///\sa nodePsTexts()
   602   GraphToEps<T> & nodePsTextsPreamble(const char *str) {
   603     _nodePsTextsPreamble=str ;return *this;
   604   }
   605   ///Sets whether the graph is undirected
   606 
   607   ///Sets whether the graph is undirected.
   608   ///
   609   ///This setting is the default for undirected graphs.
   610   ///
   611   ///\sa directed()
   612    GraphToEps<T> &undirected(bool b=true) {_undirected=b;return *this;}
   613 
   614   ///Sets whether the graph is directed
   615 
   616   ///Sets whether the graph is directed.
   617   ///Use it to show the edges as a pair of directed ones.
   618   ///
   619   ///This setting is the default for digraphs.
   620   ///
   621   ///\sa undirected()
   622   GraphToEps<T> &directed(bool b=true) {_undirected=!b;return *this;}
   623 
   624   ///Sets the title.
   625 
   626   ///Sets the title of the generated image,
   627   ///namely it inserts a <tt>%%Title:</tt> DSC field to the header of
   628   ///the EPS file.
   629   GraphToEps<T> &title(const std::string &t) {_title=t;return *this;}
   630   ///Sets the copyright statement.
   631 
   632   ///Sets the copyright statement of the generated image,
   633   ///namely it inserts a <tt>%%Copyright:</tt> DSC field to the header of
   634   ///the EPS file.
   635   GraphToEps<T> &copyright(const std::string &t) {_copyright=t;return *this;}
   636 
   637 protected:
   638   bool isInsideNode(dim2::Point<double> p, double r,int t)
   639   {
   640     switch(t) {
   641     case CIRCLE:
   642     case MALE:
   643     case FEMALE:
   644       return p.normSquare()<=r*r;
   645     case SQUARE:
   646       return p.x<=r&&p.x>=-r&&p.y<=r&&p.y>=-r;
   647     case DIAMOND:
   648       return p.x+p.y<=r && p.x-p.y<=r && -p.x+p.y<=r && -p.x-p.y<=r;
   649     }
   650     return false;
   651   }
   652 
   653 public:
   654   ~GraphToEps() { }
   655 
   656   ///Draws the graph.
   657 
   658   ///Like other functions using
   659   ///\ref named-templ-func-param "named template parameters",
   660   ///this function calls the algorithm itself, i.e. in this case
   661   ///it draws the graph.
   662   void run() {
   663     const double EPSILON=1e-9;
   664     if(dontPrint) return;
   665 
   666     _graph_to_eps_bits::_NegY<typename T::CoordsMapType>
   667       mycoords(_coords,_negY);
   668 
   669     os << "%!PS-Adobe-2.0 EPSF-2.0\n";
   670     if(_title.size()>0) os << "%%Title: " << _title << '\n';
   671      if(_copyright.size()>0) os << "%%Copyright: " << _copyright << '\n';
   672     os << "%%Creator: LEMON, graphToEps()\n";
   673 
   674     {
   675       os << "%%CreationDate: ";
   676 #ifndef WIN32
   677       timeval tv;
   678       gettimeofday(&tv, 0);
   679 
   680       char cbuf[26];
   681       ctime_r(&tv.tv_sec,cbuf);
   682       os << cbuf;
   683 #else
   684       os << bits::getWinFormattedDate();
   685 #endif
   686     }
   687     os << std::endl;
   688 
   689     if (_autoArcWidthScale) {
   690       double max_w=0;
   691       for(ArcIt e(g);e!=INVALID;++e)
   692         max_w=std::max(double(_arcWidths[e]),max_w);
   693       if(max_w>EPSILON) {
   694         _arcWidthScale/=max_w;
   695       }
   696     }
   697 
   698     if (_autoNodeScale) {
   699       double max_s=0;
   700       for(NodeIt n(g);n!=INVALID;++n)
   701         max_s=std::max(double(_nodeSizes[n]),max_s);
   702       if(max_s>EPSILON) {
   703         _nodeScale/=max_s;
   704       }
   705     }
   706 
   707     double diag_len = 1;
   708     if(!(_absoluteNodeSizes&&_absoluteArcWidths)) {
   709       dim2::Box<double> bb;
   710       for(NodeIt n(g);n!=INVALID;++n) bb.add(mycoords[n]);
   711       if (bb.empty()) {
   712         bb = dim2::Box<double>(dim2::Point<double>(0,0));
   713       }
   714       diag_len = std::sqrt((bb.bottomLeft()-bb.topRight()).normSquare());
   715       if(diag_len<EPSILON) diag_len = 1;
   716       if(!_absoluteNodeSizes) _nodeScale*=diag_len;
   717       if(!_absoluteArcWidths) _arcWidthScale*=diag_len;
   718     }
   719 
   720     dim2::Box<double> bb;
   721     for(NodeIt n(g);n!=INVALID;++n) {
   722       double ns=_nodeSizes[n]*_nodeScale;
   723       dim2::Point<double> p(ns,ns);
   724       switch(_nodeShapes[n]) {
   725       case CIRCLE:
   726       case SQUARE:
   727       case DIAMOND:
   728         bb.add(p+mycoords[n]);
   729         bb.add(-p+mycoords[n]);
   730         break;
   731       case MALE:
   732         bb.add(-p+mycoords[n]);
   733         bb.add(dim2::Point<double>(1.5*ns,1.5*std::sqrt(3.0)*ns)+mycoords[n]);
   734         break;
   735       case FEMALE:
   736         bb.add(p+mycoords[n]);
   737         bb.add(dim2::Point<double>(-ns,-3.01*ns)+mycoords[n]);
   738         break;
   739       }
   740     }
   741     if (bb.empty()) {
   742       bb = dim2::Box<double>(dim2::Point<double>(0,0));
   743     }
   744 
   745     if(_scaleToA4)
   746       os <<"%%BoundingBox: 0 0 596 842\n%%DocumentPaperSizes: a4\n";
   747     else {
   748       if(_preScale) {
   749         //Rescale so that BoundingBox won't be neither to big nor too small.
   750         while(bb.height()*_scale>1000||bb.width()*_scale>1000) _scale/=10;
   751         while(bb.height()*_scale<100||bb.width()*_scale<100) _scale*=10;
   752       }
   753 
   754       os << "%%BoundingBox: "
   755          << int(floor(bb.left()   * _scale - _xBorder)) << ' '
   756          << int(floor(bb.bottom() * _scale - _yBorder)) << ' '
   757          << int(ceil(bb.right()  * _scale + _xBorder)) << ' '
   758          << int(ceil(bb.top()    * _scale + _yBorder)) << '\n';
   759     }
   760 
   761     os << "%%EndComments\n";
   762 
   763     //x1 y1 x2 y2 x3 y3 cr cg cb w
   764     os << "/lb { setlinewidth setrgbcolor newpath moveto\n"
   765        << "      4 2 roll 1 index 1 index curveto stroke } bind def\n";
   766     os << "/l { setlinewidth setrgbcolor newpath moveto lineto stroke }"
   767        << " bind def\n";
   768     //x y r
   769     os << "/c { newpath dup 3 index add 2 index moveto 0 360 arc closepath }"
   770        << " bind def\n";
   771     //x y r
   772     os << "/sq { newpath 2 index 1 index add 2 index 2 index add moveto\n"
   773        << "      2 index 1 index sub 2 index 2 index add lineto\n"
   774        << "      2 index 1 index sub 2 index 2 index sub lineto\n"
   775        << "      2 index 1 index add 2 index 2 index sub lineto\n"
   776        << "      closepath pop pop pop} bind def\n";
   777     //x y r
   778     os << "/di { newpath 2 index 1 index add 2 index moveto\n"
   779        << "      2 index             2 index 2 index add lineto\n"
   780        << "      2 index 1 index sub 2 index             lineto\n"
   781        << "      2 index             2 index 2 index sub lineto\n"
   782        << "      closepath pop pop pop} bind def\n";
   783     // x y r cr cg cb
   784     os << "/nc { 0 0 0 setrgbcolor 5 index 5 index 5 index c fill\n"
   785        << "     setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
   786        << "   } bind def\n";
   787     os << "/nsq { 0 0 0 setrgbcolor 5 index 5 index 5 index sq fill\n"
   788        << "     setrgbcolor " << 1+_nodeBorderQuotient << " div sq fill\n"
   789        << "   } bind def\n";
   790     os << "/ndi { 0 0 0 setrgbcolor 5 index 5 index 5 index di fill\n"
   791        << "     setrgbcolor " << 1+_nodeBorderQuotient << " div di fill\n"
   792        << "   } bind def\n";
   793     os << "/nfemale { 0 0 0 setrgbcolor 3 index "
   794        << _nodeBorderQuotient/(1+_nodeBorderQuotient)
   795        << " 1.5 mul mul setlinewidth\n"
   796        << "  newpath 5 index 5 index moveto "
   797        << "5 index 5 index 5 index 3.01 mul sub\n"
   798        << "  lineto 5 index 4 index .7 mul sub 5 index 5 index 2.2 mul sub"
   799        << " moveto\n"
   800        << "  5 index 4 index .7 mul add 5 index 5 index 2.2 mul sub lineto "
   801        << "stroke\n"
   802        << "  5 index 5 index 5 index c fill\n"
   803        << "  setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
   804        << "  } bind def\n";
   805     os << "/nmale {\n"
   806        << "  0 0 0 setrgbcolor 3 index "
   807        << _nodeBorderQuotient/(1+_nodeBorderQuotient)
   808        <<" 1.5 mul mul setlinewidth\n"
   809        << "  newpath 5 index 5 index moveto\n"
   810        << "  5 index 4 index 1 mul 1.5 mul add\n"
   811        << "  5 index 5 index 3 sqrt 1.5 mul mul add\n"
   812        << "  1 index 1 index lineto\n"
   813        << "  1 index 1 index 7 index sub moveto\n"
   814        << "  1 index 1 index lineto\n"
   815        << "  exch 5 index 3 sqrt .5 mul mul sub exch 5 index .5 mul sub"
   816        << " lineto\n"
   817        << "  stroke\n"
   818        << "  5 index 5 index 5 index c fill\n"
   819        << "  setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
   820        << "  } bind def\n";
   821 
   822 
   823     os << "/arrl " << _arrowLength << " def\n";
   824     os << "/arrw " << _arrowWidth << " def\n";
   825     // l dx_norm dy_norm
   826     os << "/lrl { 2 index mul exch 2 index mul exch rlineto pop} bind def\n";
   827     //len w dx_norm dy_norm x1 y1 cr cg cb
   828     os << "/arr { setrgbcolor /y1 exch def /x1 exch def /dy exch def /dx "
   829        << "exch def\n"
   830        << "       /w exch def /len exch def\n"
   831       //<< "0.1 setlinewidth x1 y1 moveto dx len mul dy len mul rlineto stroke"
   832        << "       newpath x1 dy w 2 div mul add y1 dx w 2 div mul sub moveto\n"
   833        << "       len w sub arrl sub dx dy lrl\n"
   834        << "       arrw dy dx neg lrl\n"
   835        << "       dx arrl w add mul dy w 2 div arrw add mul sub\n"
   836        << "       dy arrl w add mul dx w 2 div arrw add mul add rlineto\n"
   837        << "       dx arrl w add mul neg dy w 2 div arrw add mul sub\n"
   838        << "       dy arrl w add mul neg dx w 2 div arrw add mul add rlineto\n"
   839        << "       arrw dy dx neg lrl\n"
   840        << "       len w sub arrl sub neg dx dy lrl\n"
   841        << "       closepath fill } bind def\n";
   842     os << "/cshow { 2 index 2 index moveto dup stringwidth pop\n"
   843        << "         neg 2 div fosi .35 mul neg rmoveto show pop pop} def\n";
   844 
   845     os << "\ngsave\n";
   846     if(_scaleToA4)
   847       if(bb.height()>bb.width()) {
   848         double sc= std::min((A4HEIGHT-2*A4BORDER)/bb.height(),
   849                   (A4WIDTH-2*A4BORDER)/bb.width());
   850         os << ((A4WIDTH -2*A4BORDER)-sc*bb.width())/2 + A4BORDER << ' '
   851            << ((A4HEIGHT-2*A4BORDER)-sc*bb.height())/2 + A4BORDER
   852            << " translate\n"
   853            << sc << " dup scale\n"
   854            << -bb.left() << ' ' << -bb.bottom() << " translate\n";
   855       }
   856       else {
   857         double sc= std::min((A4HEIGHT-2*A4BORDER)/bb.width(),
   858                   (A4WIDTH-2*A4BORDER)/bb.height());
   859         os << ((A4WIDTH -2*A4BORDER)-sc*bb.height())/2 + A4BORDER << ' '
   860            << ((A4HEIGHT-2*A4BORDER)-sc*bb.width())/2 + A4BORDER
   861            << " translate\n"
   862            << sc << " dup scale\n90 rotate\n"
   863            << -bb.left() << ' ' << -bb.top() << " translate\n";
   864         }
   865     else if(_scale!=1.0) os << _scale << " dup scale\n";
   866 
   867     if(_showArcs) {
   868       os << "%Arcs:\ngsave\n";
   869       if(_enableParallel) {
   870         std::vector<Arc> el;
   871         for(ArcIt e(g);e!=INVALID;++e)
   872           if((!_undirected||g.source(e)<g.target(e))&&_arcWidths[e]>0
   873              &&g.source(e)!=g.target(e))
   874             el.push_back(e);
   875         std::sort(el.begin(),el.end(),arcLess(g));
   876 
   877         typename std::vector<Arc>::iterator j;
   878         for(typename std::vector<Arc>::iterator i=el.begin();i!=el.end();i=j) {
   879           for(j=i+1;j!=el.end()&&isParallel(*i,*j);++j) ;
   880 
   881           double sw=0;
   882           for(typename std::vector<Arc>::iterator e=i;e!=j;++e)
   883             sw+=_arcWidths[*e]*_arcWidthScale+_parArcDist;
   884           sw-=_parArcDist;
   885           sw/=-2.0;
   886           dim2::Point<double>
   887             dvec(mycoords[g.target(*i)]-mycoords[g.source(*i)]);
   888           double l=std::sqrt(dvec.normSquare());
   889           dim2::Point<double> d(dvec/std::max(l,EPSILON));
   890           dim2::Point<double> m;
   891 //           m=dim2::Point<double>(mycoords[g.target(*i)]+
   892 //                                 mycoords[g.source(*i)])/2.0;
   893 
   894 //            m=dim2::Point<double>(mycoords[g.source(*i)])+
   895 //             dvec*(double(_nodeSizes[g.source(*i)])/
   896 //                (_nodeSizes[g.source(*i)]+_nodeSizes[g.target(*i)]));
   897 
   898           m=dim2::Point<double>(mycoords[g.source(*i)])+
   899             d*(l+_nodeSizes[g.source(*i)]-_nodeSizes[g.target(*i)])/2.0;
   900 
   901           for(typename std::vector<Arc>::iterator e=i;e!=j;++e) {
   902             sw+=_arcWidths[*e]*_arcWidthScale/2.0;
   903             dim2::Point<double> mm=m+rot90(d)*sw/.75;
   904             if(_drawArrows) {
   905               int node_shape;
   906               dim2::Point<double> s=mycoords[g.source(*e)];
   907               dim2::Point<double> t=mycoords[g.target(*e)];
   908               double rn=_nodeSizes[g.target(*e)]*_nodeScale;
   909               node_shape=_nodeShapes[g.target(*e)];
   910               dim2::Bezier3 bez(s,mm,mm,t);
   911               double t1=0,t2=1;
   912               for(int ii=0;ii<INTERPOL_PREC;++ii)
   913                 if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape)) t2=(t1+t2)/2;
   914                 else t1=(t1+t2)/2;
   915               dim2::Point<double> apoint=bez((t1+t2)/2);
   916               rn = _arrowLength+_arcWidths[*e]*_arcWidthScale;
   917               rn*=rn;
   918               t2=(t1+t2)/2;t1=0;
   919               for(int ii=0;ii<INTERPOL_PREC;++ii)
   920                 if((bez((t1+t2)/2)-apoint).normSquare()>rn) t1=(t1+t2)/2;
   921                 else t2=(t1+t2)/2;
   922               dim2::Point<double> linend=bez((t1+t2)/2);
   923               bez=bez.before((t1+t2)/2);
   924 //               rn=_nodeSizes[g.source(*e)]*_nodeScale;
   925 //               node_shape=_nodeShapes[g.source(*e)];
   926 //               t1=0;t2=1;
   927 //               for(int i=0;i<INTERPOL_PREC;++i)
   928 //                 if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape))
   929 //                   t1=(t1+t2)/2;
   930 //                 else t2=(t1+t2)/2;
   931 //               bez=bez.after((t1+t2)/2);
   932               os << _arcWidths[*e]*_arcWidthScale << " setlinewidth "
   933                  << _arcColors[*e].red() << ' '
   934                  << _arcColors[*e].green() << ' '
   935                  << _arcColors[*e].blue() << " setrgbcolor newpath\n"
   936                  << bez.p1.x << ' ' <<  bez.p1.y << " moveto\n"
   937                  << bez.p2.x << ' ' << bez.p2.y << ' '
   938                  << bez.p3.x << ' ' << bez.p3.y << ' '
   939                  << bez.p4.x << ' ' << bez.p4.y << " curveto stroke\n";
   940               dim2::Point<double> dd(rot90(linend-apoint));
   941               dd*=(.5*_arcWidths[*e]*_arcWidthScale+_arrowWidth)/
   942                 std::sqrt(dd.normSquare());
   943               os << "newpath " << psOut(apoint) << " moveto "
   944                  << psOut(linend+dd) << " lineto "
   945                  << psOut(linend-dd) << " lineto closepath fill\n";
   946             }
   947             else {
   948               os << mycoords[g.source(*e)].x << ' '
   949                  << mycoords[g.source(*e)].y << ' '
   950                  << mm.x << ' ' << mm.y << ' '
   951                  << mycoords[g.target(*e)].x << ' '
   952                  << mycoords[g.target(*e)].y << ' '
   953                  << _arcColors[*e].red() << ' '
   954                  << _arcColors[*e].green() << ' '
   955                  << _arcColors[*e].blue() << ' '
   956                  << _arcWidths[*e]*_arcWidthScale << " lb\n";
   957             }
   958             sw+=_arcWidths[*e]*_arcWidthScale/2.0+_parArcDist;
   959           }
   960         }
   961       }
   962       else for(ArcIt e(g);e!=INVALID;++e)
   963         if((!_undirected||g.source(e)<g.target(e))&&_arcWidths[e]>0
   964            &&g.source(e)!=g.target(e)) {
   965           if(_drawArrows) {
   966             dim2::Point<double> d(mycoords[g.target(e)]-mycoords[g.source(e)]);
   967             double rn=_nodeSizes[g.target(e)]*_nodeScale;
   968             int node_shape=_nodeShapes[g.target(e)];
   969             double t1=0,t2=1;
   970             for(int i=0;i<INTERPOL_PREC;++i)
   971               if(isInsideNode((-(t1+t2)/2)*d,rn,node_shape)) t1=(t1+t2)/2;
   972               else t2=(t1+t2)/2;
   973             double l=std::sqrt(d.normSquare());
   974             d/=l;
   975 
   976             os << l*(1-(t1+t2)/2) << ' '
   977                << _arcWidths[e]*_arcWidthScale << ' '
   978                << d.x << ' ' << d.y << ' '
   979                << mycoords[g.source(e)].x << ' '
   980                << mycoords[g.source(e)].y << ' '
   981                << _arcColors[e].red() << ' '
   982                << _arcColors[e].green() << ' '
   983                << _arcColors[e].blue() << " arr\n";
   984           }
   985           else os << mycoords[g.source(e)].x << ' '
   986                   << mycoords[g.source(e)].y << ' '
   987                   << mycoords[g.target(e)].x << ' '
   988                   << mycoords[g.target(e)].y << ' '
   989                   << _arcColors[e].red() << ' '
   990                   << _arcColors[e].green() << ' '
   991                   << _arcColors[e].blue() << ' '
   992                   << _arcWidths[e]*_arcWidthScale << " l\n";
   993         }
   994       os << "grestore\n";
   995     }
   996     if(_showNodes) {
   997       os << "%Nodes:\ngsave\n";
   998       for(NodeIt n(g);n!=INVALID;++n) {
   999         os << mycoords[n].x << ' ' << mycoords[n].y << ' '
  1000            << _nodeSizes[n]*_nodeScale << ' '
  1001            << _nodeColors[n].red() << ' '
  1002            << _nodeColors[n].green() << ' '
  1003            << _nodeColors[n].blue() << ' ';
  1004         switch(_nodeShapes[n]) {
  1005         case CIRCLE:
  1006           os<< "nc";break;
  1007         case SQUARE:
  1008           os<< "nsq";break;
  1009         case DIAMOND:
  1010           os<< "ndi";break;
  1011         case MALE:
  1012           os<< "nmale";break;
  1013         case FEMALE:
  1014           os<< "nfemale";break;
  1015         }
  1016         os<<'\n';
  1017       }
  1018       os << "grestore\n";
  1019     }
  1020     if(_showNodeText) {
  1021       os << "%Node texts:\ngsave\n";
  1022       os << "/fosi " << _nodeTextSize << " def\n";
  1023       os << "(Helvetica) findfont fosi scalefont setfont\n";
  1024       for(NodeIt n(g);n!=INVALID;++n) {
  1025         switch(_nodeTextColorType) {
  1026         case DIST_COL:
  1027           os << psOut(distantColor(_nodeColors[n])) << " setrgbcolor\n";
  1028           break;
  1029         case DIST_BW:
  1030           os << psOut(distantBW(_nodeColors[n])) << " setrgbcolor\n";
  1031           break;
  1032         case CUST_COL:
  1033           os << psOut(distantColor(_nodeTextColors[n])) << " setrgbcolor\n";
  1034           break;
  1035         default:
  1036           os << "0 0 0 setrgbcolor\n";
  1037         }
  1038         os << mycoords[n].x << ' ' << mycoords[n].y
  1039            << " (" << _nodeTexts[n] << ") cshow\n";
  1040       }
  1041       os << "grestore\n";
  1042     }
  1043     if(_showNodePsText) {
  1044       os << "%Node PS blocks:\ngsave\n";
  1045       for(NodeIt n(g);n!=INVALID;++n)
  1046         os << mycoords[n].x << ' ' << mycoords[n].y
  1047            << " moveto\n" << _nodePsTexts[n] << "\n";
  1048       os << "grestore\n";
  1049     }
  1050 
  1051     os << "grestore\nshowpage\n";
  1052 
  1053     //CleanUp:
  1054     if(_pleaseRemoveOsStream) {delete &os;}
  1055   }
  1056 
  1057   ///\name Aliases
  1058   ///These are just some aliases to other parameter setting functions.
  1059 
  1060   ///@{
  1061 
  1062   ///An alias for arcWidths()
  1063   template<class X> GraphToEps<ArcWidthsTraits<X> > edgeWidths(const X &x)
  1064   {
  1065     return arcWidths(x);
  1066   }
  1067 
  1068   ///An alias for arcColors()
  1069   template<class X> GraphToEps<ArcColorsTraits<X> >
  1070   edgeColors(const X &x)
  1071   {
  1072     return arcColors(x);
  1073   }
  1074 
  1075   ///An alias for arcWidthScale()
  1076   GraphToEps<T> &edgeWidthScale(double d) {return arcWidthScale(d);}
  1077 
  1078   ///An alias for autoArcWidthScale()
  1079   GraphToEps<T> &autoEdgeWidthScale(bool b=true)
  1080   {
  1081     return autoArcWidthScale(b);
  1082   }
  1083 
  1084   ///An alias for absoluteArcWidths()
  1085   GraphToEps<T> &absoluteEdgeWidths(bool b=true)
  1086   {
  1087     return absoluteArcWidths(b);
  1088   }
  1089 
  1090   ///An alias for parArcDist()
  1091   GraphToEps<T> &parEdgeDist(double d) {return parArcDist(d);}
  1092 
  1093   ///An alias for hideArcs()
  1094   GraphToEps<T> &hideEdges(bool b=true) {return hideArcs(b);}
  1095 
  1096   ///@}
  1097 };
  1098 
  1099 template<class T>
  1100 const int GraphToEps<T>::INTERPOL_PREC = 20;
  1101 template<class T>
  1102 const double GraphToEps<T>::A4HEIGHT = 841.8897637795276;
  1103 template<class T>
  1104 const double GraphToEps<T>::A4WIDTH  = 595.275590551181;
  1105 template<class T>
  1106 const double GraphToEps<T>::A4BORDER = 15;
  1107 
  1108 
  1109 ///Generates an EPS file from a graph
  1110 
  1111 ///\ingroup eps_io
  1112 ///Generates an EPS file from a graph.
  1113 ///\param g Reference to the graph to be printed.
  1114 ///\param os Reference to the output stream.
  1115 ///By default it is <tt>std::cout</tt>.
  1116 ///
  1117 ///This function also has a lot of
  1118 ///\ref named-templ-func-param "named parameters",
  1119 ///they are declared as the members of class \ref GraphToEps. The following
  1120 ///example shows how to use these parameters.
  1121 ///\code
  1122 /// graphToEps(g,os).scale(10).coords(coords)
  1123 ///              .nodeScale(2).nodeSizes(sizes)
  1124 ///              .arcWidthScale(.4).run();
  1125 ///\endcode
  1126 ///
  1127 ///For more detailed examples see the \ref graph_to_eps_demo.cc demo file.
  1128 ///
  1129 ///\warning Don't forget to put the \ref GraphToEps::run() "run()"
  1130 ///to the end of the parameter list.
  1131 ///\sa GraphToEps
  1132 ///\sa graphToEps(GR &g, const char *file_name)
  1133 template<class GR>
  1134 GraphToEps<DefaultGraphToEpsTraits<GR> >
  1135 graphToEps(GR &g, std::ostream& os=std::cout)
  1136 {
  1137   return
  1138     GraphToEps<DefaultGraphToEpsTraits<GR> >(DefaultGraphToEpsTraits<GR>(g,os));
  1139 }
  1140 
  1141 ///Generates an EPS file from a graph
  1142 
  1143 ///\ingroup eps_io
  1144 ///This function does the same as
  1145 ///\ref graphToEps(GR &g,std::ostream& os)
  1146 ///but it writes its output into the file \c file_name
  1147 ///instead of a stream.
  1148 ///\sa graphToEps(GR &g, std::ostream& os)
  1149 template<class GR>
  1150 GraphToEps<DefaultGraphToEpsTraits<GR> >
  1151 graphToEps(GR &g,const char *file_name)
  1152 {
  1153   std::ostream* os = new std::ofstream(file_name);
  1154   if (!(*os)) {
  1155     delete os;
  1156     throw IoError("Cannot write file", file_name);
  1157   }
  1158   return GraphToEps<DefaultGraphToEpsTraits<GR> >
  1159     (DefaultGraphToEpsTraits<GR>(g,*os,true));
  1160 }
  1161 
  1162 ///Generates an EPS file from a graph
  1163 
  1164 ///\ingroup eps_io
  1165 ///This function does the same as
  1166 ///\ref graphToEps(GR &g,std::ostream& os)
  1167 ///but it writes its output into the file \c file_name
  1168 ///instead of a stream.
  1169 ///\sa graphToEps(GR &g, std::ostream& os)
  1170 template<class GR>
  1171 GraphToEps<DefaultGraphToEpsTraits<GR> >
  1172 graphToEps(GR &g,const std::string& file_name)
  1173 {
  1174   std::ostream* os = new std::ofstream(file_name.c_str());
  1175   if (!(*os)) {
  1176     delete os;
  1177     throw IoError("Cannot write file", file_name);
  1178   }
  1179   return GraphToEps<DefaultGraphToEpsTraits<GR> >
  1180     (DefaultGraphToEpsTraits<GR>(g,*os,true));
  1181 }
  1182 
  1183 } //END OF NAMESPACE LEMON
  1184 
  1185 #endif // LEMON_GRAPH_TO_EPS_H