lemon/graph_to_eps.h
author Alpar Juttner <alpar@cs.elte.hu>
Sat, 27 Sep 2008 14:33:28 +0200
changeset 287 bb40b6db0a58
parent 253 dbe309b5e855
child 290 f6899946c1ac
permissions -rw-r--r--
Merge
     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) 2003-2008
     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 #define WIN32_LEAN_AND_MEAN
    33 #define NOMINMAX
    34 #include<windows.h>
    35 #endif
    36 
    37 #include<lemon/math.h>
    38 #include<lemon/core.h>
    39 #include<lemon/dim2.h>
    40 #include<lemon/maps.h>
    41 #include<lemon/color.h>
    42 #include<lemon/bits/bezier.h>
    43 
    44 
    45 ///\ingroup eps_io
    46 ///\file
    47 ///\brief A well configurable tool for visualizing graphs
    48 
    49 namespace lemon {
    50 
    51   namespace _graph_to_eps_bits {
    52     template<class MT>
    53     class _NegY {
    54     public:
    55       typedef typename MT::Key Key;
    56       typedef typename MT::Value Value;
    57       const MT &map;
    58       int yscale;
    59       _NegY(const MT &m,bool b) : map(m), yscale(1-b*2) {}
    60       Value operator[](Key n) { return Value(map[n].x,map[n].y*yscale);}
    61     };
    62   }
    63 
    64 ///Default traits class of \ref GraphToEps
    65 
    66 ///Default traits class of \ref GraphToEps.
    67 ///
    68 ///\c G is the type of the underlying graph.
    69 template<class G>
    70 struct DefaultGraphToEpsTraits
    71 {
    72   typedef G Graph;
    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 _g  Reference to the graph to be printed.
   144   ///\param _os Reference to the output stream.
   145   ///\param _os Reference to the output stream.
   146   ///By default it is <tt>std::cout</tt>.
   147   ///\param _pros If it is \c true, then the \c ostream referenced by \c _os
   148   ///will be explicitly deallocated by the destructor.
   149   DefaultGraphToEpsTraits(const G &_g,std::ostream& _os=std::cout,
   150                           bool _pros=false) :
   151     g(_g), os(_os),
   152     _coords(dim2::Point<double>(1,1)), _nodeSizes(1), _nodeShapes(0),
   153     _nodeColors(WHITE), _arcColors(BLACK),
   154     _arcWidths(1.0), _arcWidthScale(0.003),
   155     _nodeScale(.01), _xBorder(10), _yBorder(10), _scale(1.0),
   156     _nodeBorderQuotient(.1),
   157     _drawArrows(false), _arrowLength(1), _arrowWidth(0.3),
   158     _showNodes(true), _showArcs(true),
   159     _enableParallel(false), _parArcDist(1),
   160     _showNodeText(false), _nodeTexts(false), _nodeTextSize(1),
   161     _showNodePsText(false), _nodePsTexts(false), _nodePsTextsPreamble(0),
   162     _undirected(lemon::UndirectedTagIndicator<G>::value),
   163     _pleaseRemoveOsStream(_pros), _scaleToA4(false),
   164     _nodeTextColorType(SAME_COL), _nodeTextColors(BLACK),
   165     _autoNodeScale(false),
   166     _autoArcWidthScale(false),
   167     _absoluteNodeSizes(false),
   168     _absoluteArcWidths(false),
   169     _negY(false),
   170     _preScale(true)
   171   {}
   172 };
   173 
   174 ///Auxiliary class to implement the named parameters of \ref graphToEps()
   175 
   176 ///Auxiliary class to implement the named parameters of \ref graphToEps().
   177 ///
   178 ///For detailed examples see the \ref graph_to_eps_demo.cc demo file.
   179 template<class T> class GraphToEps : public T
   180 {
   181   // Can't believe it is required by the C++ standard
   182   using T::g;
   183   using T::os;
   184 
   185   using T::_coords;
   186   using T::_nodeSizes;
   187   using T::_nodeShapes;
   188   using T::_nodeColors;
   189   using T::_arcColors;
   190   using T::_arcWidths;
   191 
   192   using T::_arcWidthScale;
   193   using T::_nodeScale;
   194   using T::_xBorder;
   195   using T::_yBorder;
   196   using T::_scale;
   197   using T::_nodeBorderQuotient;
   198 
   199   using T::_drawArrows;
   200   using T::_arrowLength;
   201   using T::_arrowWidth;
   202 
   203   using T::_showNodes;
   204   using T::_showArcs;
   205 
   206   using T::_enableParallel;
   207   using T::_parArcDist;
   208 
   209   using T::_showNodeText;
   210   using T::_nodeTexts;
   211   using T::_nodeTextSize;
   212 
   213   using T::_showNodePsText;
   214   using T::_nodePsTexts;
   215   using T::_nodePsTextsPreamble;
   216 
   217   using T::_undirected;
   218 
   219   using T::_pleaseRemoveOsStream;
   220 
   221   using T::_scaleToA4;
   222 
   223   using T::_title;
   224   using T::_copyright;
   225 
   226   using T::NodeTextColorType;
   227   using T::CUST_COL;
   228   using T::DIST_COL;
   229   using T::DIST_BW;
   230   using T::_nodeTextColorType;
   231   using T::_nodeTextColors;
   232 
   233   using T::_autoNodeScale;
   234   using T::_autoArcWidthScale;
   235 
   236   using T::_absoluteNodeSizes;
   237   using T::_absoluteArcWidths;
   238 
   239 
   240   using T::_negY;
   241   using T::_preScale;
   242 
   243   // dradnats ++C eht yb deriuqer si ti eveileb t'naC
   244 
   245   typedef typename T::Graph Graph;
   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     ///
   274     SQUARE=1,
   275     /// = 2
   276     ///\image html nodeshape_2.png
   277     ///\image latex nodeshape_2.eps "DIAMOND shape (2)" width=2cm
   278     ///
   279     DIAMOND=2,
   280     /// = 3
   281     ///\image html nodeshape_3.png
   282     ///\image latex nodeshape_2.eps "MALE shape (4)" width=2cm
   283     ///
   284     MALE=3,
   285     /// = 4
   286     ///\image html nodeshape_4.png
   287     ///\image latex nodeshape_2.eps "FEMALE shape (4)" width=2cm
   288     ///
   289     FEMALE=4
   290   };
   291 
   292 private:
   293   class arcLess {
   294     const Graph &g;
   295   public:
   296     arcLess(const Graph &_g) : g(_g) {}
   297     bool operator()(Arc a,Arc b) const
   298     {
   299       Node ai=std::min(g.source(a),g.target(a));
   300       Node aa=std::max(g.source(a),g.target(a));
   301       Node bi=std::min(g.source(b),g.target(b));
   302       Node ba=std::max(g.source(b),g.target(b));
   303       return ai<bi ||
   304         (ai==bi && (aa < ba ||
   305                     (aa==ba && ai==g.source(a) && bi==g.target(b))));
   306     }
   307   };
   308   bool isParallel(Arc e,Arc f) const
   309   {
   310     return (g.source(e)==g.source(f)&&
   311             g.target(e)==g.target(f)) ||
   312       (g.source(e)==g.target(f)&&
   313        g.target(e)==g.source(f));
   314   }
   315   template<class TT>
   316   static std::string psOut(const dim2::Point<TT> &p)
   317     {
   318       std::ostringstream os;
   319       os << p.x << ' ' << p.y;
   320       return os.str();
   321     }
   322   static std::string psOut(const Color &c)
   323     {
   324       std::ostringstream os;
   325       os << c.red() << ' ' << c.green() << ' ' << c.blue();
   326       return os.str();
   327     }
   328 
   329 public:
   330   GraphToEps(const T &t) : T(t), dontPrint(false) {};
   331 
   332   template<class X> struct CoordsTraits : public T {
   333   typedef X CoordsMapType;
   334     const X &_coords;
   335     CoordsTraits(const T &t,const X &x) : T(t), _coords(x) {}
   336   };
   337   ///Sets the map of the node coordinates
   338 
   339   ///Sets the map of the node coordinates.
   340   ///\param x must be a node map with \ref dim2::Point "dim2::Point<double>" or
   341   ///\ref dim2::Point "dim2::Point<int>" values.
   342   template<class X> GraphToEps<CoordsTraits<X> > coords(const X &x) {
   343     dontPrint=true;
   344     return GraphToEps<CoordsTraits<X> >(CoordsTraits<X>(*this,x));
   345   }
   346   template<class X> struct NodeSizesTraits : public T {
   347     const X &_nodeSizes;
   348     NodeSizesTraits(const T &t,const X &x) : T(t), _nodeSizes(x) {}
   349   };
   350   ///Sets the map of the node sizes
   351 
   352   ///Sets the map of the node sizes.
   353   ///\param x must be a node map with \c double (or convertible) values.
   354   template<class X> GraphToEps<NodeSizesTraits<X> > nodeSizes(const X &x)
   355   {
   356     dontPrint=true;
   357     return GraphToEps<NodeSizesTraits<X> >(NodeSizesTraits<X>(*this,x));
   358   }
   359   template<class X> struct NodeShapesTraits : public T {
   360     const X &_nodeShapes;
   361     NodeShapesTraits(const T &t,const X &x) : T(t), _nodeShapes(x) {}
   362   };
   363   ///Sets the map of the node shapes
   364 
   365   ///Sets the map of the node shapes.
   366   ///The available shape values
   367   ///can be found in \ref NodeShapes "enum NodeShapes".
   368   ///\param x must be a node map with \c int (or convertible) values.
   369   ///\sa NodeShapes
   370   template<class X> GraphToEps<NodeShapesTraits<X> > nodeShapes(const X &x)
   371   {
   372     dontPrint=true;
   373     return GraphToEps<NodeShapesTraits<X> >(NodeShapesTraits<X>(*this,x));
   374   }
   375   template<class X> struct NodeTextsTraits : public T {
   376     const X &_nodeTexts;
   377     NodeTextsTraits(const T &t,const X &x) : T(t), _nodeTexts(x) {}
   378   };
   379   ///Sets the text printed on the nodes
   380 
   381   ///Sets the text printed on the nodes.
   382   ///\param x must be a node map with type that can be pushed to a standard
   383   ///\c ostream.
   384   template<class X> GraphToEps<NodeTextsTraits<X> > nodeTexts(const X &x)
   385   {
   386     dontPrint=true;
   387     _showNodeText=true;
   388     return GraphToEps<NodeTextsTraits<X> >(NodeTextsTraits<X>(*this,x));
   389   }
   390   template<class X> struct NodePsTextsTraits : public T {
   391     const X &_nodePsTexts;
   392     NodePsTextsTraits(const T &t,const X &x) : T(t), _nodePsTexts(x) {}
   393   };
   394   ///Inserts a PostScript block to the nodes
   395 
   396   ///With this command it is possible to insert a verbatim PostScript
   397   ///block to the nodes.
   398   ///The PS current point will be moved to the center of the node before
   399   ///the PostScript block inserted.
   400   ///
   401   ///Before and after the block a newline character is inserted so you
   402   ///don't have to bother with the separators.
   403   ///
   404   ///\param x must be a node map with type that can be pushed to a standard
   405   ///\c ostream.
   406   ///
   407   ///\sa nodePsTextsPreamble()
   408   template<class X> GraphToEps<NodePsTextsTraits<X> > nodePsTexts(const X &x)
   409   {
   410     dontPrint=true;
   411     _showNodePsText=true;
   412     return GraphToEps<NodePsTextsTraits<X> >(NodePsTextsTraits<X>(*this,x));
   413   }
   414   template<class X> struct ArcWidthsTraits : public T {
   415     const X &_arcWidths;
   416     ArcWidthsTraits(const T &t,const X &x) : T(t), _arcWidths(x) {}
   417   };
   418   ///Sets the map of the arc widths
   419 
   420   ///Sets the map of the arc widths.
   421   ///\param x must be an arc map with \c double (or convertible) values.
   422   template<class X> GraphToEps<ArcWidthsTraits<X> > arcWidths(const X &x)
   423   {
   424     dontPrint=true;
   425     return GraphToEps<ArcWidthsTraits<X> >(ArcWidthsTraits<X>(*this,x));
   426   }
   427 
   428   template<class X> struct NodeColorsTraits : public T {
   429     const X &_nodeColors;
   430     NodeColorsTraits(const T &t,const X &x) : T(t), _nodeColors(x) {}
   431   };
   432   ///Sets the map of the node colors
   433 
   434   ///Sets the map of the node colors.
   435   ///\param x must be a node map with \ref Color values.
   436   ///
   437   ///\sa Palette
   438   template<class X> GraphToEps<NodeColorsTraits<X> >
   439   nodeColors(const X &x)
   440   {
   441     dontPrint=true;
   442     return GraphToEps<NodeColorsTraits<X> >(NodeColorsTraits<X>(*this,x));
   443   }
   444   template<class X> struct NodeTextColorsTraits : public T {
   445     const X &_nodeTextColors;
   446     NodeTextColorsTraits(const T &t,const X &x) : T(t), _nodeTextColors(x) {}
   447   };
   448   ///Sets the map of the node text colors
   449 
   450   ///Sets the map of the node text colors.
   451   ///\param x must be a node map with \ref Color values.
   452   ///
   453   ///\sa Palette
   454   template<class X> GraphToEps<NodeTextColorsTraits<X> >
   455   nodeTextColors(const X &x)
   456   {
   457     dontPrint=true;
   458     _nodeTextColorType=CUST_COL;
   459     return GraphToEps<NodeTextColorsTraits<X> >
   460       (NodeTextColorsTraits<X>(*this,x));
   461   }
   462   template<class X> struct ArcColorsTraits : public T {
   463     const X &_arcColors;
   464     ArcColorsTraits(const T &t,const X &x) : T(t), _arcColors(x) {}
   465   };
   466   ///Sets the map of the arc colors
   467 
   468   ///Sets the map of the arc colors.
   469   ///\param x must be an arc map with \ref Color values.
   470   ///
   471   ///\sa Palette
   472   template<class X> GraphToEps<ArcColorsTraits<X> >
   473   arcColors(const X &x)
   474   {
   475     dontPrint=true;
   476     return GraphToEps<ArcColorsTraits<X> >(ArcColorsTraits<X>(*this,x));
   477   }
   478   ///Sets a global scale factor for node sizes
   479 
   480   ///Sets a global scale factor for node sizes.
   481   ///
   482   /// If nodeSizes() is not given, this function simply sets the node
   483   /// sizes to \c d.  If nodeSizes() is given, but
   484   /// autoNodeScale() is not, then the node size given by
   485   /// nodeSizes() will be multiplied by the value \c d.
   486   /// If both nodeSizes() and autoNodeScale() are used, then the
   487   /// node sizes will be scaled in such a way that the greatest size will be
   488   /// equal to \c d.
   489   /// \sa nodeSizes()
   490   /// \sa autoNodeScale()
   491   GraphToEps<T> &nodeScale(double d=.01) {_nodeScale=d;return *this;}
   492   ///Turns on/off the automatic node size scaling.
   493 
   494   ///Turns on/off the automatic node size scaling.
   495   ///
   496   ///\sa nodeScale()
   497   ///
   498   GraphToEps<T> &autoNodeScale(bool b=true) {
   499     _autoNodeScale=b;return *this;
   500   }
   501 
   502   ///Turns on/off the absolutematic node size scaling.
   503 
   504   ///Turns on/off the absolutematic node size scaling.
   505   ///
   506   ///\sa nodeScale()
   507   ///
   508   GraphToEps<T> &absoluteNodeSizes(bool b=true) {
   509     _absoluteNodeSizes=b;return *this;
   510   }
   511 
   512   ///Negates the Y coordinates.
   513   GraphToEps<T> &negateY(bool b=true) {
   514     _negY=b;return *this;
   515   }
   516 
   517   ///Turn on/off pre-scaling
   518 
   519   ///By default graphToEps() rescales the whole image in order to avoid
   520   ///very big or very small bounding boxes.
   521   ///
   522   ///This (p)rescaling can be turned off with this function.
   523   ///
   524   GraphToEps<T> &preScale(bool b=true) {
   525     _preScale=b;return *this;
   526   }
   527 
   528   ///Sets a global scale factor for arc widths
   529 
   530   /// Sets a global scale factor for arc widths.
   531   ///
   532   /// If arcWidths() is not given, this function simply sets the arc
   533   /// widths to \c d.  If arcWidths() is given, but
   534   /// autoArcWidthScale() is not, then the arc withs given by
   535   /// arcWidths() will be multiplied by the value \c d.
   536   /// If both arcWidths() and autoArcWidthScale() are used, then the
   537   /// arc withs will be scaled in such a way that the greatest width will be
   538   /// equal to \c d.
   539   GraphToEps<T> &arcWidthScale(double d=.003) {_arcWidthScale=d;return *this;}
   540   ///Turns on/off the automatic arc width scaling.
   541 
   542   ///Turns on/off the automatic arc width scaling.
   543   ///
   544   ///\sa arcWidthScale()
   545   ///
   546   GraphToEps<T> &autoArcWidthScale(bool b=true) {
   547     _autoArcWidthScale=b;return *this;
   548   }
   549   ///Turns on/off the absolutematic arc width scaling.
   550 
   551   ///Turns on/off the absolutematic arc width scaling.
   552   ///
   553   ///\sa arcWidthScale()
   554   ///
   555   GraphToEps<T> &absoluteArcWidths(bool b=true) {
   556     _absoluteArcWidths=b;return *this;
   557   }
   558   ///Sets a global scale factor for the whole picture
   559   GraphToEps<T> &scale(double d) {_scale=d;return *this;}
   560   ///Sets the width of the border around the picture
   561   GraphToEps<T> &border(double b=10) {_xBorder=_yBorder=b;return *this;}
   562   ///Sets the width of the border around the picture
   563   GraphToEps<T> &border(double x, double y) {
   564     _xBorder=x;_yBorder=y;return *this;
   565   }
   566   ///Sets whether to draw arrows
   567   GraphToEps<T> &drawArrows(bool b=true) {_drawArrows=b;return *this;}
   568   ///Sets the length of the arrowheads
   569   GraphToEps<T> &arrowLength(double d=1.0) {_arrowLength*=d;return *this;}
   570   ///Sets the width of the arrowheads
   571   GraphToEps<T> &arrowWidth(double d=.3) {_arrowWidth*=d;return *this;}
   572 
   573   ///Scales the drawing to fit to A4 page
   574   GraphToEps<T> &scaleToA4() {_scaleToA4=true;return *this;}
   575 
   576   ///Enables parallel arcs
   577   GraphToEps<T> &enableParallel(bool b=true) {_enableParallel=b;return *this;}
   578 
   579   ///Sets the distance between parallel arcs
   580   GraphToEps<T> &parArcDist(double d) {_parArcDist*=d;return *this;}
   581 
   582   ///Hides the arcs
   583   GraphToEps<T> &hideArcs(bool b=true) {_showArcs=!b;return *this;}
   584   ///Hides the nodes
   585   GraphToEps<T> &hideNodes(bool b=true) {_showNodes=!b;return *this;}
   586 
   587   ///Sets the size of the node texts
   588   GraphToEps<T> &nodeTextSize(double d) {_nodeTextSize=d;return *this;}
   589 
   590   ///Sets the color of the node texts to be different from the node color
   591 
   592   ///Sets the color of the node texts to be as different from the node color
   593   ///as it is possible.
   594   GraphToEps<T> &distantColorNodeTexts()
   595   {_nodeTextColorType=DIST_COL;return *this;}
   596   ///Sets the color of the node texts to be black or white and always visible.
   597 
   598   ///Sets the color of the node texts to be black or white according to
   599   ///which is more different from the node color.
   600   GraphToEps<T> &distantBWNodeTexts()
   601   {_nodeTextColorType=DIST_BW;return *this;}
   602 
   603   ///Gives a preamble block for node Postscript block.
   604 
   605   ///Gives a preamble block for node Postscript block.
   606   ///
   607   ///\sa nodePsTexts()
   608   GraphToEps<T> & nodePsTextsPreamble(const char *str) {
   609     _nodePsTextsPreamble=str ;return *this;
   610   }
   611   ///Sets whether the graph is undirected
   612 
   613   ///Sets whether the graph is undirected.
   614   ///
   615   ///This setting is the default for undirected graphs.
   616   ///
   617   ///\sa directed()
   618    GraphToEps<T> &undirected(bool b=true) {_undirected=b;return *this;}
   619 
   620   ///Sets whether the graph is directed
   621 
   622   ///Sets whether the graph is directed.
   623   ///Use it to show the edges as a pair of directed ones.
   624   ///
   625   ///This setting is the default for digraphs.
   626   ///
   627   ///\sa undirected()
   628   GraphToEps<T> &directed(bool b=true) {_undirected=!b;return *this;}
   629 
   630   ///Sets the title.
   631 
   632   ///Sets the title of the generated image,
   633   ///namely it inserts a <tt>%%Title:</tt> DSC field to the header of
   634   ///the EPS file.
   635   GraphToEps<T> &title(const std::string &t) {_title=t;return *this;}
   636   ///Sets the copyright statement.
   637 
   638   ///Sets the copyright statement of the generated image,
   639   ///namely it inserts a <tt>%%Copyright:</tt> DSC field to the header of
   640   ///the EPS file.
   641   GraphToEps<T> &copyright(const std::string &t) {_copyright=t;return *this;}
   642 
   643 protected:
   644   bool isInsideNode(dim2::Point<double> p, double r,int t)
   645   {
   646     switch(t) {
   647     case CIRCLE:
   648     case MALE:
   649     case FEMALE:
   650       return p.normSquare()<=r*r;
   651     case SQUARE:
   652       return p.x<=r&&p.x>=-r&&p.y<=r&&p.y>=-r;
   653     case DIAMOND:
   654       return p.x+p.y<=r && p.x-p.y<=r && -p.x+p.y<=r && -p.x-p.y<=r;
   655     }
   656     return false;
   657   }
   658 
   659 public:
   660   ~GraphToEps() { }
   661 
   662   ///Draws the graph.
   663 
   664   ///Like other functions using
   665   ///\ref named-templ-func-param "named template parameters",
   666   ///this function calls the algorithm itself, i.e. in this case
   667   ///it draws the graph.
   668   void run() {
   669     const double EPSILON=1e-9;
   670     if(dontPrint) return;
   671 
   672     _graph_to_eps_bits::_NegY<typename T::CoordsMapType>
   673       mycoords(_coords,_negY);
   674 
   675     os << "%!PS-Adobe-2.0 EPSF-2.0\n";
   676     if(_title.size()>0) os << "%%Title: " << _title << '\n';
   677      if(_copyright.size()>0) os << "%%Copyright: " << _copyright << '\n';
   678     os << "%%Creator: LEMON, graphToEps()\n";
   679 
   680     {
   681 #ifndef WIN32
   682       timeval tv;
   683       gettimeofday(&tv, 0);
   684 
   685       char cbuf[26];
   686       ctime_r(&tv.tv_sec,cbuf);
   687       os << "%%CreationDate: " << cbuf;
   688 #else
   689       SYSTEMTIME time;
   690       char buf1[11], buf2[9], buf3[5];
   691 
   692       GetSystemTime(&time);
   693       if (GetDateFormat(LOCALE_USER_DEFAULT, 0, &time,
   694                         "ddd MMM dd", buf1, 11) &&
   695           GetTimeFormat(LOCALE_USER_DEFAULT, 0, &time,
   696                         "HH':'mm':'ss", buf2, 9) &&
   697           GetDateFormat(LOCALE_USER_DEFAULT, 0, &time,
   698                                 "yyyy", buf3, 5)) {
   699         os << "%%CreationDate: " << buf1 << ' '
   700            << buf2 << ' ' << buf3 << std::endl;
   701       }
   702 #endif
   703     }
   704 
   705     if (_autoArcWidthScale) {
   706       double max_w=0;
   707       for(ArcIt e(g);e!=INVALID;++e)
   708         max_w=std::max(double(_arcWidths[e]),max_w);
   709       if(max_w>EPSILON) {
   710         _arcWidthScale/=max_w;
   711       }
   712     }
   713 
   714     if (_autoNodeScale) {
   715       double max_s=0;
   716       for(NodeIt n(g);n!=INVALID;++n)
   717         max_s=std::max(double(_nodeSizes[n]),max_s);
   718       if(max_s>EPSILON) {
   719         _nodeScale/=max_s;
   720       }
   721     }
   722 
   723     double diag_len = 1;
   724     if(!(_absoluteNodeSizes&&_absoluteArcWidths)) {
   725       dim2::Box<double> bb;
   726       for(NodeIt n(g);n!=INVALID;++n) bb.add(mycoords[n]);
   727       if (bb.empty()) {
   728         bb = dim2::Box<double>(dim2::Point<double>(0,0));
   729       }
   730       diag_len = std::sqrt((bb.bottomLeft()-bb.topRight()).normSquare());
   731       if(diag_len<EPSILON) diag_len = 1;
   732       if(!_absoluteNodeSizes) _nodeScale*=diag_len;
   733       if(!_absoluteArcWidths) _arcWidthScale*=diag_len;
   734     }
   735 
   736     dim2::Box<double> bb;
   737     for(NodeIt n(g);n!=INVALID;++n) {
   738       double ns=_nodeSizes[n]*_nodeScale;
   739       dim2::Point<double> p(ns,ns);
   740       switch(_nodeShapes[n]) {
   741       case CIRCLE:
   742       case SQUARE:
   743       case DIAMOND:
   744         bb.add(p+mycoords[n]);
   745         bb.add(-p+mycoords[n]);
   746         break;
   747       case MALE:
   748         bb.add(-p+mycoords[n]);
   749         bb.add(dim2::Point<double>(1.5*ns,1.5*std::sqrt(3.0)*ns)+mycoords[n]);
   750         break;
   751       case FEMALE:
   752         bb.add(p+mycoords[n]);
   753         bb.add(dim2::Point<double>(-ns,-3.01*ns)+mycoords[n]);
   754         break;
   755       }
   756     }
   757     if (bb.empty()) {
   758       bb = dim2::Box<double>(dim2::Point<double>(0,0));
   759     }
   760 
   761     if(_scaleToA4)
   762       os <<"%%BoundingBox: 0 0 596 842\n%%DocumentPaperSizes: a4\n";
   763     else {
   764       if(_preScale) {
   765         //Rescale so that BoundingBox won't be neither to big nor too small.
   766         while(bb.height()*_scale>1000||bb.width()*_scale>1000) _scale/=10;
   767         while(bb.height()*_scale<100||bb.width()*_scale<100) _scale*=10;
   768       }
   769 
   770       os << "%%BoundingBox: "
   771          << int(floor(bb.left()   * _scale - _xBorder)) << ' '
   772          << int(floor(bb.bottom() * _scale - _yBorder)) << ' '
   773          << int(ceil(bb.right()  * _scale + _xBorder)) << ' '
   774          << int(ceil(bb.top()    * _scale + _yBorder)) << '\n';
   775     }
   776 
   777     os << "%%EndComments\n";
   778 
   779     //x1 y1 x2 y2 x3 y3 cr cg cb w
   780     os << "/lb { setlinewidth setrgbcolor newpath moveto\n"
   781        << "      4 2 roll 1 index 1 index curveto stroke } bind def\n";
   782     os << "/l { setlinewidth setrgbcolor newpath moveto lineto stroke }"
   783        << " bind def\n";
   784     //x y r
   785     os << "/c { newpath dup 3 index add 2 index moveto 0 360 arc closepath }"
   786        << " bind def\n";
   787     //x y r
   788     os << "/sq { newpath 2 index 1 index add 2 index 2 index add moveto\n"
   789        << "      2 index 1 index sub 2 index 2 index add lineto\n"
   790        << "      2 index 1 index sub 2 index 2 index sub lineto\n"
   791        << "      2 index 1 index add 2 index 2 index sub lineto\n"
   792        << "      closepath pop pop pop} bind def\n";
   793     //x y r
   794     os << "/di { newpath 2 index 1 index add 2 index moveto\n"
   795        << "      2 index             2 index 2 index add lineto\n"
   796        << "      2 index 1 index sub 2 index             lineto\n"
   797        << "      2 index             2 index 2 index sub lineto\n"
   798        << "      closepath pop pop pop} bind def\n";
   799     // x y r cr cg cb
   800     os << "/nc { 0 0 0 setrgbcolor 5 index 5 index 5 index c fill\n"
   801        << "     setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
   802        << "   } bind def\n";
   803     os << "/nsq { 0 0 0 setrgbcolor 5 index 5 index 5 index sq fill\n"
   804        << "     setrgbcolor " << 1+_nodeBorderQuotient << " div sq fill\n"
   805        << "   } bind def\n";
   806     os << "/ndi { 0 0 0 setrgbcolor 5 index 5 index 5 index di fill\n"
   807        << "     setrgbcolor " << 1+_nodeBorderQuotient << " div di fill\n"
   808        << "   } bind def\n";
   809     os << "/nfemale { 0 0 0 setrgbcolor 3 index "
   810        << _nodeBorderQuotient/(1+_nodeBorderQuotient)
   811        << " 1.5 mul mul setlinewidth\n"
   812        << "  newpath 5 index 5 index moveto "
   813        << "5 index 5 index 5 index 3.01 mul sub\n"
   814        << "  lineto 5 index 4 index .7 mul sub 5 index 5 index 2.2 mul sub"
   815        << " moveto\n"
   816        << "  5 index 4 index .7 mul add 5 index 5 index 2.2 mul sub lineto "
   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     os << "/nmale {\n"
   822        << "  0 0 0 setrgbcolor 3 index "
   823        << _nodeBorderQuotient/(1+_nodeBorderQuotient)
   824        <<" 1.5 mul mul setlinewidth\n"
   825        << "  newpath 5 index 5 index moveto\n"
   826        << "  5 index 4 index 1 mul 1.5 mul add\n"
   827        << "  5 index 5 index 3 sqrt 1.5 mul mul add\n"
   828        << "  1 index 1 index lineto\n"
   829        << "  1 index 1 index 7 index sub moveto\n"
   830        << "  1 index 1 index lineto\n"
   831        << "  exch 5 index 3 sqrt .5 mul mul sub exch 5 index .5 mul sub"
   832        << " lineto\n"
   833        << "  stroke\n"
   834        << "  5 index 5 index 5 index c fill\n"
   835        << "  setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
   836        << "  } bind def\n";
   837 
   838 
   839     os << "/arrl " << _arrowLength << " def\n";
   840     os << "/arrw " << _arrowWidth << " def\n";
   841     // l dx_norm dy_norm
   842     os << "/lrl { 2 index mul exch 2 index mul exch rlineto pop} bind def\n";
   843     //len w dx_norm dy_norm x1 y1 cr cg cb
   844     os << "/arr { setrgbcolor /y1 exch def /x1 exch def /dy exch def /dx "
   845        << "exch def\n"
   846        << "       /w exch def /len exch def\n"
   847       //<< "0.1 setlinewidth x1 y1 moveto dx len mul dy len mul rlineto stroke"
   848        << "       newpath x1 dy w 2 div mul add y1 dx w 2 div mul sub moveto\n"
   849        << "       len w sub arrl sub dx dy lrl\n"
   850        << "       arrw dy dx neg lrl\n"
   851        << "       dx arrl w add mul dy w 2 div arrw add mul sub\n"
   852        << "       dy arrl w add mul dx w 2 div arrw add mul add rlineto\n"
   853        << "       dx arrl w add mul neg dy w 2 div arrw add mul sub\n"
   854        << "       dy arrl w add mul neg dx w 2 div arrw add mul add rlineto\n"
   855        << "       arrw dy dx neg lrl\n"
   856        << "       len w sub arrl sub neg dx dy lrl\n"
   857        << "       closepath fill } bind def\n";
   858     os << "/cshow { 2 index 2 index moveto dup stringwidth pop\n"
   859        << "         neg 2 div fosi .35 mul neg rmoveto show pop pop} def\n";
   860 
   861     os << "\ngsave\n";
   862     if(_scaleToA4)
   863       if(bb.height()>bb.width()) {
   864         double sc= std::min((A4HEIGHT-2*A4BORDER)/bb.height(),
   865                   (A4WIDTH-2*A4BORDER)/bb.width());
   866         os << ((A4WIDTH -2*A4BORDER)-sc*bb.width())/2 + A4BORDER << ' '
   867            << ((A4HEIGHT-2*A4BORDER)-sc*bb.height())/2 + A4BORDER
   868            << " translate\n"
   869            << sc << " dup scale\n"
   870            << -bb.left() << ' ' << -bb.bottom() << " translate\n";
   871       }
   872       else {
   873         double sc= std::min((A4HEIGHT-2*A4BORDER)/bb.width(),
   874                   (A4WIDTH-2*A4BORDER)/bb.height());
   875         os << ((A4WIDTH -2*A4BORDER)-sc*bb.height())/2 + A4BORDER << ' '
   876            << ((A4HEIGHT-2*A4BORDER)-sc*bb.width())/2 + A4BORDER
   877            << " translate\n"
   878            << sc << " dup scale\n90 rotate\n"
   879            << -bb.left() << ' ' << -bb.top() << " translate\n";
   880         }
   881     else if(_scale!=1.0) os << _scale << " dup scale\n";
   882 
   883     if(_showArcs) {
   884       os << "%Arcs:\ngsave\n";
   885       if(_enableParallel) {
   886         std::vector<Arc> el;
   887         for(ArcIt e(g);e!=INVALID;++e)
   888           if((!_undirected||g.source(e)<g.target(e))&&_arcWidths[e]>0
   889              &&g.source(e)!=g.target(e))
   890             el.push_back(e);
   891         std::sort(el.begin(),el.end(),arcLess(g));
   892 
   893         typename std::vector<Arc>::iterator j;
   894         for(typename std::vector<Arc>::iterator i=el.begin();i!=el.end();i=j) {
   895           for(j=i+1;j!=el.end()&&isParallel(*i,*j);++j) ;
   896 
   897           double sw=0;
   898           for(typename std::vector<Arc>::iterator e=i;e!=j;++e)
   899             sw+=_arcWidths[*e]*_arcWidthScale+_parArcDist;
   900           sw-=_parArcDist;
   901           sw/=-2.0;
   902           dim2::Point<double>
   903             dvec(mycoords[g.target(*i)]-mycoords[g.source(*i)]);
   904           double l=std::sqrt(dvec.normSquare());
   905           dim2::Point<double> d(dvec/std::max(l,EPSILON));
   906           dim2::Point<double> m;
   907 //           m=dim2::Point<double>(mycoords[g.target(*i)]+
   908 //                                 mycoords[g.source(*i)])/2.0;
   909 
   910 //            m=dim2::Point<double>(mycoords[g.source(*i)])+
   911 //             dvec*(double(_nodeSizes[g.source(*i)])/
   912 //                (_nodeSizes[g.source(*i)]+_nodeSizes[g.target(*i)]));
   913 
   914           m=dim2::Point<double>(mycoords[g.source(*i)])+
   915             d*(l+_nodeSizes[g.source(*i)]-_nodeSizes[g.target(*i)])/2.0;
   916 
   917           for(typename std::vector<Arc>::iterator e=i;e!=j;++e) {
   918             sw+=_arcWidths[*e]*_arcWidthScale/2.0;
   919             dim2::Point<double> mm=m+rot90(d)*sw/.75;
   920             if(_drawArrows) {
   921               int node_shape;
   922               dim2::Point<double> s=mycoords[g.source(*e)];
   923               dim2::Point<double> t=mycoords[g.target(*e)];
   924               double rn=_nodeSizes[g.target(*e)]*_nodeScale;
   925               node_shape=_nodeShapes[g.target(*e)];
   926               dim2::Bezier3 bez(s,mm,mm,t);
   927               double t1=0,t2=1;
   928               for(int ii=0;ii<INTERPOL_PREC;++ii)
   929                 if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape)) t2=(t1+t2)/2;
   930                 else t1=(t1+t2)/2;
   931               dim2::Point<double> apoint=bez((t1+t2)/2);
   932               rn = _arrowLength+_arcWidths[*e]*_arcWidthScale;
   933               rn*=rn;
   934               t2=(t1+t2)/2;t1=0;
   935               for(int ii=0;ii<INTERPOL_PREC;++ii)
   936                 if((bez((t1+t2)/2)-apoint).normSquare()>rn) t1=(t1+t2)/2;
   937                 else t2=(t1+t2)/2;
   938               dim2::Point<double> linend=bez((t1+t2)/2);
   939               bez=bez.before((t1+t2)/2);
   940 //               rn=_nodeSizes[g.source(*e)]*_nodeScale;
   941 //               node_shape=_nodeShapes[g.source(*e)];
   942 //               t1=0;t2=1;
   943 //               for(int i=0;i<INTERPOL_PREC;++i)
   944 //                 if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape))
   945 //                   t1=(t1+t2)/2;
   946 //                 else t2=(t1+t2)/2;
   947 //               bez=bez.after((t1+t2)/2);
   948               os << _arcWidths[*e]*_arcWidthScale << " setlinewidth "
   949                  << _arcColors[*e].red() << ' '
   950                  << _arcColors[*e].green() << ' '
   951                  << _arcColors[*e].blue() << " setrgbcolor newpath\n"
   952                  << bez.p1.x << ' ' <<  bez.p1.y << " moveto\n"
   953                  << bez.p2.x << ' ' << bez.p2.y << ' '
   954                  << bez.p3.x << ' ' << bez.p3.y << ' '
   955                  << bez.p4.x << ' ' << bez.p4.y << " curveto stroke\n";
   956               dim2::Point<double> dd(rot90(linend-apoint));
   957               dd*=(.5*_arcWidths[*e]*_arcWidthScale+_arrowWidth)/
   958                 std::sqrt(dd.normSquare());
   959               os << "newpath " << psOut(apoint) << " moveto "
   960                  << psOut(linend+dd) << " lineto "
   961                  << psOut(linend-dd) << " lineto closepath fill\n";
   962             }
   963             else {
   964               os << mycoords[g.source(*e)].x << ' '
   965                  << mycoords[g.source(*e)].y << ' '
   966                  << mm.x << ' ' << mm.y << ' '
   967                  << mycoords[g.target(*e)].x << ' '
   968                  << mycoords[g.target(*e)].y << ' '
   969                  << _arcColors[*e].red() << ' '
   970                  << _arcColors[*e].green() << ' '
   971                  << _arcColors[*e].blue() << ' '
   972                  << _arcWidths[*e]*_arcWidthScale << " lb\n";
   973             }
   974             sw+=_arcWidths[*e]*_arcWidthScale/2.0+_parArcDist;
   975           }
   976         }
   977       }
   978       else for(ArcIt e(g);e!=INVALID;++e)
   979         if((!_undirected||g.source(e)<g.target(e))&&_arcWidths[e]>0
   980            &&g.source(e)!=g.target(e)) {
   981           if(_drawArrows) {
   982             dim2::Point<double> d(mycoords[g.target(e)]-mycoords[g.source(e)]);
   983             double rn=_nodeSizes[g.target(e)]*_nodeScale;
   984             int node_shape=_nodeShapes[g.target(e)];
   985             double t1=0,t2=1;
   986             for(int i=0;i<INTERPOL_PREC;++i)
   987               if(isInsideNode((-(t1+t2)/2)*d,rn,node_shape)) t1=(t1+t2)/2;
   988               else t2=(t1+t2)/2;
   989             double l=std::sqrt(d.normSquare());
   990             d/=l;
   991 
   992             os << l*(1-(t1+t2)/2) << ' '
   993                << _arcWidths[e]*_arcWidthScale << ' '
   994                << d.x << ' ' << d.y << ' '
   995                << mycoords[g.source(e)].x << ' '
   996                << mycoords[g.source(e)].y << ' '
   997                << _arcColors[e].red() << ' '
   998                << _arcColors[e].green() << ' '
   999                << _arcColors[e].blue() << " arr\n";
  1000           }
  1001           else os << mycoords[g.source(e)].x << ' '
  1002                   << mycoords[g.source(e)].y << ' '
  1003                   << mycoords[g.target(e)].x << ' '
  1004                   << mycoords[g.target(e)].y << ' '
  1005                   << _arcColors[e].red() << ' '
  1006                   << _arcColors[e].green() << ' '
  1007                   << _arcColors[e].blue() << ' '
  1008                   << _arcWidths[e]*_arcWidthScale << " l\n";
  1009         }
  1010       os << "grestore\n";
  1011     }
  1012     if(_showNodes) {
  1013       os << "%Nodes:\ngsave\n";
  1014       for(NodeIt n(g);n!=INVALID;++n) {
  1015         os << mycoords[n].x << ' ' << mycoords[n].y << ' '
  1016            << _nodeSizes[n]*_nodeScale << ' '
  1017            << _nodeColors[n].red() << ' '
  1018            << _nodeColors[n].green() << ' '
  1019            << _nodeColors[n].blue() << ' ';
  1020         switch(_nodeShapes[n]) {
  1021         case CIRCLE:
  1022           os<< "nc";break;
  1023         case SQUARE:
  1024           os<< "nsq";break;
  1025         case DIAMOND:
  1026           os<< "ndi";break;
  1027         case MALE:
  1028           os<< "nmale";break;
  1029         case FEMALE:
  1030           os<< "nfemale";break;
  1031         }
  1032         os<<'\n';
  1033       }
  1034       os << "grestore\n";
  1035     }
  1036     if(_showNodeText) {
  1037       os << "%Node texts:\ngsave\n";
  1038       os << "/fosi " << _nodeTextSize << " def\n";
  1039       os << "(Helvetica) findfont fosi scalefont setfont\n";
  1040       for(NodeIt n(g);n!=INVALID;++n) {
  1041         switch(_nodeTextColorType) {
  1042         case DIST_COL:
  1043           os << psOut(distantColor(_nodeColors[n])) << " setrgbcolor\n";
  1044           break;
  1045         case DIST_BW:
  1046           os << psOut(distantBW(_nodeColors[n])) << " setrgbcolor\n";
  1047           break;
  1048         case CUST_COL:
  1049           os << psOut(distantColor(_nodeTextColors[n])) << " setrgbcolor\n";
  1050           break;
  1051         default:
  1052           os << "0 0 0 setrgbcolor\n";
  1053         }
  1054         os << mycoords[n].x << ' ' << mycoords[n].y
  1055            << " (" << _nodeTexts[n] << ") cshow\n";
  1056       }
  1057       os << "grestore\n";
  1058     }
  1059     if(_showNodePsText) {
  1060       os << "%Node PS blocks:\ngsave\n";
  1061       for(NodeIt n(g);n!=INVALID;++n)
  1062         os << mycoords[n].x << ' ' << mycoords[n].y
  1063            << " moveto\n" << _nodePsTexts[n] << "\n";
  1064       os << "grestore\n";
  1065     }
  1066 
  1067     os << "grestore\nshowpage\n";
  1068 
  1069     //CleanUp:
  1070     if(_pleaseRemoveOsStream) {delete &os;}
  1071   }
  1072 
  1073   ///\name Aliases
  1074   ///These are just some aliases to other parameter setting functions.
  1075 
  1076   ///@{
  1077 
  1078   ///An alias for arcWidths()
  1079   template<class X> GraphToEps<ArcWidthsTraits<X> > edgeWidths(const X &x)
  1080   {
  1081     return arcWidths(x);
  1082   }
  1083 
  1084   ///An alias for arcColors()
  1085   template<class X> GraphToEps<ArcColorsTraits<X> >
  1086   edgeColors(const X &x)
  1087   {
  1088     return arcColors(x);
  1089   }
  1090 
  1091   ///An alias for arcWidthScale()
  1092   GraphToEps<T> &edgeWidthScale(double d) {return arcWidthScale(d);}
  1093 
  1094   ///An alias for autoArcWidthScale()
  1095   GraphToEps<T> &autoEdgeWidthScale(bool b=true)
  1096   {
  1097     return autoArcWidthScale(b);
  1098   }
  1099 
  1100   ///An alias for absoluteArcWidths()
  1101   GraphToEps<T> &absoluteEdgeWidths(bool b=true)
  1102   {
  1103     return absoluteArcWidths(b);
  1104   }
  1105 
  1106   ///An alias for parArcDist()
  1107   GraphToEps<T> &parEdgeDist(double d) {return parArcDist(d);}
  1108 
  1109   ///An alias for hideArcs()
  1110   GraphToEps<T> &hideEdges(bool b=true) {return hideArcs(b);}
  1111 
  1112   ///@}
  1113 };
  1114 
  1115 template<class T>
  1116 const int GraphToEps<T>::INTERPOL_PREC = 20;
  1117 template<class T>
  1118 const double GraphToEps<T>::A4HEIGHT = 841.8897637795276;
  1119 template<class T>
  1120 const double GraphToEps<T>::A4WIDTH  = 595.275590551181;
  1121 template<class T>
  1122 const double GraphToEps<T>::A4BORDER = 15;
  1123 
  1124 
  1125 ///Generates an EPS file from a graph
  1126 
  1127 ///\ingroup eps_io
  1128 ///Generates an EPS file from a graph.
  1129 ///\param g Reference to the graph to be printed.
  1130 ///\param os Reference to the output stream.
  1131 ///By default it is <tt>std::cout</tt>.
  1132 ///
  1133 ///This function also has a lot of
  1134 ///\ref named-templ-func-param "named parameters",
  1135 ///they are declared as the members of class \ref GraphToEps. The following
  1136 ///example shows how to use these parameters.
  1137 ///\code
  1138 /// graphToEps(g,os).scale(10).coords(coords)
  1139 ///              .nodeScale(2).nodeSizes(sizes)
  1140 ///              .arcWidthScale(.4).run();
  1141 ///\endcode
  1142 ///
  1143 ///For more detailed examples see the \ref graph_to_eps_demo.cc demo file.
  1144 ///
  1145 ///\warning Don't forget to put the \ref GraphToEps::run() "run()"
  1146 ///to the end of the parameter list.
  1147 ///\sa GraphToEps
  1148 ///\sa graphToEps(G &g, const char *file_name)
  1149 template<class G>
  1150 GraphToEps<DefaultGraphToEpsTraits<G> >
  1151 graphToEps(G &g, std::ostream& os=std::cout)
  1152 {
  1153   return
  1154     GraphToEps<DefaultGraphToEpsTraits<G> >(DefaultGraphToEpsTraits<G>(g,os));
  1155 }
  1156 
  1157 ///Generates an EPS file from a graph
  1158 
  1159 ///\ingroup eps_io
  1160 ///This function does the same as
  1161 ///\ref graphToEps(G &g,std::ostream& os)
  1162 ///but it writes its output into the file \c file_name
  1163 ///instead of a stream.
  1164 ///\sa graphToEps(G &g, std::ostream& os)
  1165 template<class G>
  1166 GraphToEps<DefaultGraphToEpsTraits<G> >
  1167 graphToEps(G &g,const char *file_name)
  1168 {
  1169   return GraphToEps<DefaultGraphToEpsTraits<G> >
  1170     (DefaultGraphToEpsTraits<G>(g,*new std::ofstream(file_name),true));
  1171 }
  1172 
  1173 ///Generates an EPS file from a graph
  1174 
  1175 ///\ingroup eps_io
  1176 ///This function does the same as
  1177 ///\ref graphToEps(G &g,std::ostream& os)
  1178 ///but it writes its output into the file \c file_name
  1179 ///instead of a stream.
  1180 ///\sa graphToEps(G &g, std::ostream& os)
  1181 template<class G>
  1182 GraphToEps<DefaultGraphToEpsTraits<G> >
  1183 graphToEps(G &g,const std::string& file_name)
  1184 {
  1185   return GraphToEps<DefaultGraphToEpsTraits<G> >
  1186     (DefaultGraphToEpsTraits<G>(g,*new std::ofstream(file_name.c_str()),true));
  1187 }
  1188 
  1189 } //END OF NAMESPACE LEMON
  1190 
  1191 #endif // LEMON_GRAPH_TO_EPS_H