alpar@1073: /* -*- C++ -*-
ladanyi@1435:  * lemon/graph_to_eps.h - Part of LEMON, a generic C++ optimization library
alpar@1073:  *
alpar@1164:  * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
alpar@1359:  * (Egervary Research Group on Combinatorial Optimization, EGRES).
alpar@1073:  *
alpar@1073:  * Permission to use, modify and distribute this software is granted
alpar@1073:  * provided that this copyright notice appears in all copies. For
alpar@1073:  * precise terms see the accompanying LICENSE file.
alpar@1073:  *
alpar@1073:  * This software is provided "AS IS" with no warranty of any kind,
alpar@1073:  * express or implied, and with no claim as to its suitability for any
alpar@1073:  * purpose.
alpar@1073:  *
alpar@1073:  */
alpar@1073: 
alpar@1073: #ifndef LEMON_GRAPH_TO_EPS_H
alpar@1073: #define LEMON_GRAPH_TO_EPS_H
alpar@1073: 
alpar@1108: #include <sys/time.h>
alpar@1108: 
alpar@1073: #include<iostream>
alpar@1073: #include<fstream>
alpar@1073: #include<sstream>
alpar@1073: #include<algorithm>
alpar@1073: #include<vector>
alpar@1073: 
deba@1417: #include <ctime>
deba@1417: #include <cmath>
deba@1417: 
alpar@1234: #include<lemon/invalid.h>
alpar@1073: #include<lemon/xy.h>
alpar@1073: #include<lemon/maps.h>
alpar@1073: #include<lemon/bezier.h>
alpar@1073: 
deba@1417: 
alpar@1287: ///\ingroup io_group
alpar@1073: ///\file
alpar@1073: ///\brief Simple graph drawer
alpar@1073: ///
alpar@1073: ///\author Alpar Juttner
alpar@1073: 
alpar@1073: namespace lemon {
alpar@1073: 
alpar@1073: ///Data structure representing RGB colors.
alpar@1073: 
alpar@1073: ///Data structure representing RGB colors.
alpar@1073: ///\ingroup misc
alpar@1073: class Color
alpar@1073: {
alpar@1073:   double _r,_g,_b;
alpar@1073: public:
alpar@1073:   ///Default constructor
alpar@1073:   Color() {}
alpar@1073:   ///Constructor
alpar@1073:   Color(double r,double g,double b) :_r(r),_g(g),_b(b) {};
alpar@1073:   ///Returns the red component
alpar@1178: 
alpar@1178:   ///\todo \c red() could be a better name...
alpar@1178:   double getR() const {return _r;}
alpar@1073:   ///Returns the green component
alpar@1178:   double getG() const {return _g;}
alpar@1073:   ///Returns the blue component
alpar@1178:   double getB() const {return _b;}
alpar@1073:   ///Set the color components
alpar@1073:   void set(double r,double g,double b) { _r=r;_g=g;_b=b; };
alpar@1073: };
alpar@1178: 
alpar@1178: ///Maps <tt>int</tt>s to different \ref Color "Color"s
alpar@1178: 
alpar@1178: ///This map assing one of the predefined \ref Color "Color"s
alpar@1178: ///to each <tt>int</tt>. It is possible to change the colors as well as their
alpar@1178: ///number. The integer range is cyclically mapped to the provided set of colors.
alpar@1178: ///
alpar@1178: ///This is a true \ref concept::ReferenceMap "reference map", so you can also
alpar@1178: ///change the actual colors.
alpar@1178: 
alpar@1178: class ColorSet : public MapBase<int,Color>
alpar@1178: {
alpar@1178:   std::vector<Color> colors;
alpar@1178: public:
alpar@1178:   ///Constructor
alpar@1178: 
alpar@1178:   ///Constructor
alpar@1178:   ///\param have_white indicates wheter white is
alpar@1178:   ///amongst the provided color (\c true) or not (\c false). If it is true,
alpar@1178:   ///white will be assigned to \c 0.
alpar@1178:   ///\param num the number of the allocated colors. If it is \c 0
alpar@1178:   ///the default color configuration is set up (26 color plus the while).
alpar@1178:   ///If \c num is less then 26/27 then the default color list is cut. Otherwise
alpar@1178:   ///the color list is filled repeatedly with the default color list.
alpar@1178:   ColorSet(bool have_white=false,int num=0)
alpar@1178:   {
alpar@1178:     do {
alpar@1178:       if(have_white) colors.push_back(Color(1,1,1));
alpar@1178: 
alpar@1178:       colors.push_back(Color(0,0,0));
alpar@1178:       colors.push_back(Color(1,0,0));
alpar@1178:       colors.push_back(Color(0,1,0));
alpar@1178:       colors.push_back(Color(0,0,1));
alpar@1178:       colors.push_back(Color(1,1,0));
alpar@1178:       colors.push_back(Color(1,0,1));
alpar@1178:       colors.push_back(Color(0,1,1));
alpar@1178:       
alpar@1178:       colors.push_back(Color(.5,0,0));
alpar@1178:       colors.push_back(Color(0,.5,0));
alpar@1178:       colors.push_back(Color(0,0,.5));
alpar@1178:       colors.push_back(Color(.5,.5,0));
alpar@1178:       colors.push_back(Color(.5,0,.5));
alpar@1178:       colors.push_back(Color(0,.5,.5));
alpar@1178:       
alpar@1178:       colors.push_back(Color(.5,.5,.5));
alpar@1178:       colors.push_back(Color(1,.5,.5));
alpar@1178:       colors.push_back(Color(.5,1,.5));
alpar@1178:       colors.push_back(Color(.5,.5,1));
alpar@1178:       colors.push_back(Color(1,1,.5));
alpar@1178:       colors.push_back(Color(1,.5,1));
alpar@1178:       colors.push_back(Color(.5,1,1));
alpar@1178:       
alpar@1178:       colors.push_back(Color(1,.5,0));
alpar@1178:       colors.push_back(Color(.5,1,0));
alpar@1178:       colors.push_back(Color(1,0,.5));
alpar@1178:       colors.push_back(Color(0,1,.5));
alpar@1178:       colors.push_back(Color(0,.5,1));
alpar@1178:       colors.push_back(Color(.5,0,1));
alpar@1178:     } while(int(colors.size())<num);
alpar@1178:     //    colors.push_back(Color(1,1,1));
alpar@1178:     if(num>0) colors.resize(num);
alpar@1178:   }
alpar@1178:   ///\e
alpar@1178:   Color &operator[](int i)
alpar@1178:   {
alpar@1178:     return colors[i%colors.size()];
alpar@1178:   }
alpar@1178:   ///\e
alpar@1178:   const Color &operator[](int i) const
alpar@1178:   {
alpar@1178:     return colors[i%colors.size()];
alpar@1178:   }
alpar@1178:   ///\e
alpar@1178:   void set(int i,const Color &c)
alpar@1178:   {
alpar@1178:     colors[i%colors.size()]=c;
alpar@1178:   }
alpar@1178:   ///Sets the number of the exiting colors.
alpar@1178:   void resize(int s) { colors.resize(s);}
alpar@1178:   ///Returns the munber of the existing colors.
alpar@1178:   std::size_t size() { return colors.size();}
alpar@1178: };
alpar@1178: 
alpar@1178: ///Returns a visible distinct \ref Color
alpar@1178: 
alpar@1178: ///Returns a \ref Color which is as different from the given parameter
alpar@1178: ///as it is possible.
alpar@1178: inline Color distantColor(const Color &c) 
alpar@1178: {
alpar@1178:   return Color(c.getR()<.5?1:0,c.getG()<.5?1:0,c.getB()<.5?1:0);
alpar@1178: }
alpar@1178: ///Returns black for light colors and white for the dark ones.
alpar@1178: 
alpar@1178: ///Returns black for light colors and white for the dark ones.
alpar@1178: ///\todo weighted average would be better
alpar@1178: inline Color distantBW(const Color &c){
alpar@1180:   double v=(.2125*c.getR()+.7154*c.getG()+.0721*c.getB())<.5?1:0;
alpar@1178:   return Color(v,v,v);
alpar@1178: }
alpar@1178: 
alpar@1073: ///Default traits class of \ref GraphToEps
alpar@1073: 
alpar@1073: ///Default traits class of \ref GraphToEps
alpar@1073: ///
alpar@1073: ///\c G is the type of the underlying graph.
alpar@1073: template<class G>
alpar@1073: struct DefaultGraphToEpsTraits
alpar@1073: {
alpar@1073:   typedef G Graph;
alpar@1073:   typedef typename Graph::Node Node;
alpar@1073:   typedef typename Graph::NodeIt NodeIt;
alpar@1073:   typedef typename Graph::Edge Edge;
alpar@1073:   typedef typename Graph::EdgeIt EdgeIt;
alpar@1073:   typedef typename Graph::InEdgeIt InEdgeIt;
alpar@1073:   typedef typename Graph::OutEdgeIt OutEdgeIt;
alpar@1073:   
alpar@1073: 
alpar@1073:   const Graph &g;
alpar@1073: 
alpar@1073:   std::ostream& os;
alpar@1073:   
alpar@1073:   ConstMap<typename Graph::Node,xy<double> > _coords;
alpar@1073:   ConstMap<typename Graph::Node,double > _nodeSizes;
alpar@1086:   ConstMap<typename Graph::Node,int > _nodeShapes;
alpar@1073: 
alpar@1073:   ConstMap<typename Graph::Node,Color > _nodeColors;
alpar@1073:   ConstMap<typename Graph::Edge,Color > _edgeColors;
alpar@1073: 
alpar@1073:   ConstMap<typename Graph::Edge,double > _edgeWidths;
alpar@1103: 
alpar@1073:   double _edgeWidthScale;
alpar@1073:   
alpar@1073:   double _nodeScale;
alpar@1073:   double _xBorder, _yBorder;
alpar@1073:   double _scale;
alpar@1073:   double _nodeBorderQuotient;
alpar@1073:   
alpar@1073:   bool _drawArrows;
alpar@1073:   double _arrowLength, _arrowWidth;
alpar@1073:   
alpar@1073:   bool _showNodes, _showEdges;
alpar@1073: 
alpar@1073:   bool _enableParallel;
alpar@1073:   double _parEdgeDist;
alpar@1073: 
alpar@1073:   bool _showNodeText;
alpar@1073:   ConstMap<typename Graph::Node,bool > _nodeTexts;  
alpar@1073:   double _nodeTextSize;
alpar@1073: 
alpar@1085:   bool _showNodePsText;
alpar@1085:   ConstMap<typename Graph::Node,bool > _nodePsTexts;  
alpar@1085:   char *_nodePsTextsPreamble;
alpar@1085:   
alpar@1073:   bool _undir;
alpar@1073:   bool _pleaseRemoveOsStream;
alpar@1103: 
alpar@1103:   bool _scaleToA4;
alpar@1108: 
alpar@1108:   std::string _title;
alpar@1108:   std::string _copyright;
alpar@1178: 
alpar@1178:   enum NodeTextColorType 
alpar@1178:     { DIST_COL=0, DIST_BW=1, CUST_COL=2, SAME_COL=3 } _nodeTextColorType;
alpar@1178:   ConstMap<typename Graph::Node,Color > _nodeTextColors;
alpar@1178: 
alpar@1073:   ///Constructor
alpar@1073: 
alpar@1073:   ///Constructor
alpar@1073:   ///\param _g is a reference to the graph to be printed
alpar@1073:   ///\param _os is a reference to the output stream.
alpar@1073:   ///\param _os is a reference to the output stream.
alpar@1073:   ///\param _pros If it is \c true, then the \c ostream referenced by \c _os
alpar@1073:   ///will be explicitly deallocated by the destructor.
alpar@1073:   ///By default it is <tt>std::cout</tt>
alpar@1073:   DefaultGraphToEpsTraits(const G &_g,std::ostream& _os=std::cout,
alpar@1073: 			  bool _pros=false) :
alpar@1073:     g(_g), os(_os),
alpar@1086:     _coords(xy<double>(1,1)), _nodeSizes(1.0), _nodeShapes(0),
alpar@1073:     _nodeColors(Color(1,1,1)), _edgeColors(Color(0,0,0)),
alpar@1073:     _edgeWidths(1), _edgeWidthScale(0.3),
alpar@1073:     _nodeScale(1.0), _xBorder(10), _yBorder(10), _scale(1.0),
alpar@1073:     _nodeBorderQuotient(.1),
alpar@1073:     _drawArrows(false), _arrowLength(1), _arrowWidth(0.3),
alpar@1073:     _showNodes(true), _showEdges(true),
alpar@1073:     _enableParallel(false), _parEdgeDist(1),
alpar@1073:     _showNodeText(false), _nodeTexts(false), _nodeTextSize(1),
alpar@1085:     _showNodePsText(false), _nodePsTexts(false), _nodePsTextsPreamble(0),
alpar@1073:     _undir(false),
alpar@1178:     _pleaseRemoveOsStream(_pros), _scaleToA4(false),
alpar@1178:     _nodeTextColorType(SAME_COL), _nodeTextColors(Color(0,0,0))
alpar@1178:   {}
alpar@1073: };
alpar@1073: 
alpar@1073: ///Helper class to implement the named parameters of \ref graphToEps()
alpar@1073: 
alpar@1073: ///Helper class to implement the named parameters of \ref graphToEps()
alpar@1073: ///\todo Is 'helper class' a good name for this?
alpar@1073: ///
alpar@1103: ///\todo Follow PostScript's DSC.
alpar@1107: /// Use own dictionary.
alpar@1107: ///\todo Useful new features.
alpar@1107: /// - Linestyles: dotted, dashed etc.
alpar@1107: /// - A second color and percent value for the lines.
alpar@1073: template<class T> class GraphToEps : public T 
alpar@1073: {
alpar@1234:   // Can't believe it is required by the C++ standard
alpar@1234:   using T::g;
alpar@1234:   using T::os;
alpar@1234: 
alpar@1234:   using T::_coords;
alpar@1234:   using T::_nodeSizes;
alpar@1234:   using T::_nodeShapes;
alpar@1234:   using T::_nodeColors;
alpar@1234:   using T::_edgeColors;
alpar@1234:   using T::_edgeWidths;
alpar@1234: 
alpar@1234:   using T::_edgeWidthScale;
alpar@1234:   using T::_nodeScale;
alpar@1234:   using T::_xBorder;
alpar@1234:   using T::_yBorder;
alpar@1234:   using T::_scale;
alpar@1234:   using T::_nodeBorderQuotient;
alpar@1234:   
alpar@1234:   using T::_drawArrows;
alpar@1234:   using T::_arrowLength;
alpar@1234:   using T::_arrowWidth;
alpar@1234:   
alpar@1234:   using T::_showNodes;
alpar@1234:   using T::_showEdges;
alpar@1234: 
alpar@1234:   using T::_enableParallel;
alpar@1234:   using T::_parEdgeDist;
alpar@1234: 
alpar@1234:   using T::_showNodeText;
alpar@1234:   using T::_nodeTexts;  
alpar@1234:   using T::_nodeTextSize;
alpar@1234: 
alpar@1234:   using T::_showNodePsText;
alpar@1234:   using T::_nodePsTexts;  
alpar@1234:   using T::_nodePsTextsPreamble;
alpar@1234:   
alpar@1234:   using T::_undir;
alpar@1234:   using T::_pleaseRemoveOsStream;
alpar@1234: 
alpar@1234:   using T::_scaleToA4;
alpar@1234: 
alpar@1234:   using T::_title;
alpar@1234:   using T::_copyright;
alpar@1234: 
alpar@1234:   using T::NodeTextColorType;
alpar@1234:   using T::CUST_COL;
alpar@1234:   using T::DIST_COL;
alpar@1234:   using T::DIST_BW;
alpar@1234:   using T::_nodeTextColorType;
alpar@1234:   using T::_nodeTextColors;
alpar@1234:   // dradnats ++C eht yb deriuqer si ti eveileb t'naC
alpar@1234: 
alpar@1073:   typedef typename T::Graph Graph;
alpar@1073:   typedef typename Graph::Node Node;
alpar@1073:   typedef typename Graph::NodeIt NodeIt;
alpar@1073:   typedef typename Graph::Edge Edge;
alpar@1073:   typedef typename Graph::EdgeIt EdgeIt;
alpar@1073:   typedef typename Graph::InEdgeIt InEdgeIt;
alpar@1073:   typedef typename Graph::OutEdgeIt OutEdgeIt;
alpar@1073: 
alpar@1087:   static const int INTERPOL_PREC=20;
alpar@1234:   static const double A4HEIGHT = 841.8897637795276;
alpar@1234:   static const double A4WIDTH  = 595.275590551181;
alpar@1234:   static const double A4BORDER = 15;
alpar@1087: 
alpar@1073:   bool dontPrint;
alpar@1073: 
alpar@1107: public:
alpar@1107:   ///Node shapes
alpar@1107: 
alpar@1107:   ///Node shapes
alpar@1107:   ///
alpar@1107:   enum NodeShapes { 
alpar@1107:     /// = 0
alpar@1107:     ///\image html nodeshape_0.png
alpar@1107:     ///\image latex nodeshape_0.eps "CIRCLE shape (0)" width=2cm
alpar@1107:     CIRCLE=0, 
alpar@1107:     /// = 1
alpar@1107:     ///\image html nodeshape_1.png
alpar@1107:     ///\image latex nodeshape_1.eps "SQUARE shape (1)" width=2cm
alpar@1107:     ///
alpar@1107:     SQUARE=1, 
alpar@1107:     /// = 2
alpar@1107:     ///\image html nodeshape_2.png
alpar@1107:     ///\image latex nodeshape_2.eps "DIAMOND shape (2)" width=2cm
alpar@1107:     ///
alpar@1107:     DIAMOND=2
alpar@1107:   };
alpar@1107: 
alpar@1107: private:
alpar@1073:   class edgeLess {
alpar@1073:     const Graph &g;
alpar@1073:   public:
alpar@1073:     edgeLess(const Graph &_g) : g(_g) {}
alpar@1073:     bool operator()(Edge a,Edge b) const 
alpar@1073:     {
alpar@1367:       Node ai=std::min(g.source(a),g.target(a));
alpar@1367:       Node aa=std::max(g.source(a),g.target(a));
alpar@1367:       Node bi=std::min(g.source(b),g.target(b));
alpar@1367:       Node ba=std::max(g.source(b),g.target(b));
alpar@1073:       return ai<bi ||
alpar@1073: 	(ai==bi && (aa < ba || 
alpar@1073: 		    (aa==ba && ai==g.source(a) && bi==g.target(b))));
alpar@1073:     }
alpar@1073:   };
alpar@1073:   bool isParallel(Edge e,Edge f) const
alpar@1073:   {
alpar@1234:     return (g.source(e)==g.source(f)&&
alpar@1234: 	    g.target(e)==g.target(f)) ||
alpar@1234:       (g.source(e)==g.target(f)&&
alpar@1234:        g.target(e)==g.source(f));
alpar@1073:   }
alpar@1178:   template<class TT>
alpar@1178:   static std::string psOut(const xy<TT> &p) 
alpar@1073:     {
alpar@1073:       std::ostringstream os;	
alpar@1073:       os << p.x << ' ' << p.y;
alpar@1073:       return os.str();
alpar@1073:     }
alpar@1178:   static std::string psOut(const Color &c) 
alpar@1178:     {
alpar@1178:       std::ostringstream os;	
alpar@1178:       os << c.getR() << ' ' << c.getG() << ' ' << c.getB();
alpar@1178:       return os.str();
alpar@1178:     }
alpar@1073:   
alpar@1073: public:
alpar@1073:   GraphToEps(const T &t) : T(t), dontPrint(false) {};
alpar@1073:   
alpar@1073:   template<class X> struct CoordsTraits : public T {
alpar@1073:     const X &_coords;
alpar@1073:     CoordsTraits(const T &t,const X &x) : T(t), _coords(x) {}
alpar@1073:   };
alpar@1073:   ///Sets the map of the node coordinates
alpar@1073: 
alpar@1073:   ///Sets the map of the node coordinates.
alpar@1103:   ///\param x must be a node map with xy<double> or \ref xy "xy<int>" values. 
alpar@1073:   template<class X> GraphToEps<CoordsTraits<X> > coords(const X &x) {
alpar@1073:     dontPrint=true;
alpar@1073:     return GraphToEps<CoordsTraits<X> >(CoordsTraits<X>(*this,x));
alpar@1073:   }
alpar@1073:   template<class X> struct NodeSizesTraits : public T {
alpar@1073:     const X &_nodeSizes;
alpar@1073:     NodeSizesTraits(const T &t,const X &x) : T(t), _nodeSizes(x) {}
alpar@1073:   };
alpar@1073:   ///Sets the map of the node sizes
alpar@1073: 
alpar@1073:   ///Sets the map of the node sizes
alpar@1073:   ///\param x must be a node map with \c double (or convertible) values. 
alpar@1073:   template<class X> GraphToEps<NodeSizesTraits<X> > nodeSizes(const X &x)
alpar@1073:   {
alpar@1073:     dontPrint=true;
alpar@1073:     return GraphToEps<NodeSizesTraits<X> >(NodeSizesTraits<X>(*this,x));
alpar@1073:   }
alpar@1086:   template<class X> struct NodeShapesTraits : public T {
alpar@1086:     const X &_nodeShapes;
alpar@1086:     NodeShapesTraits(const T &t,const X &x) : T(t), _nodeShapes(x) {}
alpar@1086:   };
alpar@1086:   ///Sets the map of the node shapes
alpar@1086: 
alpar@1107:   ///Sets the map of the node shapes.
alpar@1107:   ///The availabe shape values
alpar@1107:   ///can be found in \ref NodeShapes "enum NodeShapes".
alpar@1086:   ///\param x must be a node map with \c int (or convertible) values. 
alpar@1107:   ///\sa NodeShapes
alpar@1086:   template<class X> GraphToEps<NodeShapesTraits<X> > nodeShapes(const X &x)
alpar@1086:   {
alpar@1086:     dontPrint=true;
alpar@1086:     return GraphToEps<NodeShapesTraits<X> >(NodeShapesTraits<X>(*this,x));
alpar@1086:   }
alpar@1073:   template<class X> struct NodeTextsTraits : public T {
alpar@1073:     const X &_nodeTexts;
alpar@1073:     NodeTextsTraits(const T &t,const X &x) : T(t), _nodeTexts(x) {}
alpar@1073:   };
alpar@1073:   ///Sets the text printed on the nodes
alpar@1073: 
alpar@1073:   ///Sets the text printed on the nodes
alpar@1073:   ///\param x must be a node map with type that can be pushed to a standard
alpar@1073:   ///ostream. 
alpar@1073:   template<class X> GraphToEps<NodeTextsTraits<X> > nodeTexts(const X &x)
alpar@1073:   {
alpar@1073:     dontPrint=true;
alpar@1073:     _showNodeText=true;
alpar@1073:     return GraphToEps<NodeTextsTraits<X> >(NodeTextsTraits<X>(*this,x));
alpar@1073:   }
alpar@1085:   template<class X> struct NodePsTextsTraits : public T {
alpar@1085:     const X &_nodePsTexts;
alpar@1085:     NodePsTextsTraits(const T &t,const X &x) : T(t), _nodePsTexts(x) {}
alpar@1085:   };
alpar@1085:   ///Inserts a PostScript block to the nodes
alpar@1085: 
alpar@1085:   ///With this command it is possible to insert a verbatim PostScript
alpar@1085:   ///block to the nodes.
alpar@1085:   ///The PS current point will be moved to the centre of the node before
alpar@1085:   ///the PostScript block inserted.
alpar@1085:   ///
alpar@1085:   ///Before and after the block a newline character is inserted to you
alpar@1085:   ///don't have to bother with the separators.
alpar@1085:   ///
alpar@1085:   ///\param x must be a node map with type that can be pushed to a standard
alpar@1085:   ///ostream.
alpar@1085:   ///
alpar@1085:   ///\sa nodePsTextsPreamble()
alpar@1085:   ///\todo Offer the choise not to move to the centre but pass the coordinates
alpar@1085:   ///to the Postscript block inserted.
alpar@1085:   template<class X> GraphToEps<NodePsTextsTraits<X> > nodePsTexts(const X &x)
alpar@1085:   {
alpar@1085:     dontPrint=true;
alpar@1085:     _showNodePsText=true;
alpar@1085:     return GraphToEps<NodePsTextsTraits<X> >(NodePsTextsTraits<X>(*this,x));
alpar@1085:   }
alpar@1085:   template<class X> struct EdgeWidthsTraits : public T {
alpar@1073:     const X &_edgeWidths;
alpar@1073:     EdgeWidthsTraits(const T &t,const X &x) : T(t), _edgeWidths(x) {}
alpar@1073:   };
alpar@1073:   ///Sets the map of the edge widths
alpar@1073: 
alpar@1073:   ///Sets the map of the edge widths
alpar@1073:   ///\param x must be a edge map with \c double (or convertible) values. 
alpar@1073:   template<class X> GraphToEps<EdgeWidthsTraits<X> > edgeWidths(const X &x)
alpar@1073:   {
alpar@1073:     dontPrint=true;
alpar@1073:     return GraphToEps<EdgeWidthsTraits<X> >(EdgeWidthsTraits<X>(*this,x));
alpar@1073:   }
alpar@1073: 
alpar@1073:   template<class X> struct NodeColorsTraits : public T {
alpar@1073:     const X &_nodeColors;
alpar@1073:     NodeColorsTraits(const T &t,const X &x) : T(t), _nodeColors(x) {}
alpar@1073:   };
alpar@1073:   ///Sets the map of the node colors
alpar@1073: 
alpar@1073:   ///Sets the map of the node colors
alpar@1073:   ///\param x must be a node map with \ref Color values. 
alpar@1073:   template<class X> GraphToEps<NodeColorsTraits<X> >
alpar@1073:   nodeColors(const X &x)
alpar@1073:   {
alpar@1073:     dontPrint=true;
alpar@1073:     return GraphToEps<NodeColorsTraits<X> >(NodeColorsTraits<X>(*this,x));
alpar@1073:   }
alpar@1178:   template<class X> struct NodeTextColorsTraits : public T {
alpar@1178:     const X &_nodeTextColors;
alpar@1178:     NodeTextColorsTraits(const T &t,const X &x) : T(t), _nodeTextColors(x) {}
alpar@1178:   };
alpar@1178:   ///Sets the map of the node text colors
alpar@1178: 
alpar@1178:   ///Sets the map of the node text colors
alpar@1178:   ///\param x must be a node map with \ref Color values. 
alpar@1178:   template<class X> GraphToEps<NodeTextColorsTraits<X> >
alpar@1178:   nodeTextColors(const X &x)
alpar@1178:   {
alpar@1178:     dontPrint=true;
alpar@1178:     _nodeTextColorType=CUST_COL;
alpar@1178:     return GraphToEps<NodeTextColorsTraits<X> >
alpar@1178:       (NodeTextColorsTraits<X>(*this,x));
alpar@1178:   }
alpar@1073:   template<class X> struct EdgeColorsTraits : public T {
alpar@1073:     const X &_edgeColors;
alpar@1073:     EdgeColorsTraits(const T &t,const X &x) : T(t), _edgeColors(x) {}
alpar@1073:   };
alpar@1073:   ///Sets the map of the edge colors
alpar@1073: 
alpar@1073:   ///Sets the map of the edge colors
alpar@1073:   ///\param x must be a edge map with \ref Color values. 
alpar@1073:   template<class X> GraphToEps<EdgeColorsTraits<X> >
alpar@1073:   edgeColors(const X &x)
alpar@1073:   {
alpar@1073:     dontPrint=true;
alpar@1073:     return GraphToEps<EdgeColorsTraits<X> >(EdgeColorsTraits<X>(*this,x));
alpar@1073:   }
alpar@1073:   ///Sets a global scale factor for node sizes
alpar@1073: 
alpar@1073:   ///Sets a global scale factor for node sizes
alpar@1073:   ///
alpar@1073:   GraphToEps<T> &nodeScale(double d) {_nodeScale=d;return *this;}
alpar@1073:   ///Sets a global scale factor for edge widths
alpar@1073: 
alpar@1073:   ///Sets a global scale factor for edge widths
alpar@1073:   ///
alpar@1073:   GraphToEps<T> &edgeWidthScale(double d) {_edgeWidthScale=d;return *this;}
alpar@1073:   ///Sets a global scale factor for the whole picture
alpar@1073: 
alpar@1073:   ///Sets a global scale factor for the whole picture
alpar@1073:   ///
alpar@1073:   GraphToEps<T> &scale(double d) {_scale=d;return *this;}
alpar@1073:   ///Sets the width of the border around the picture
alpar@1073: 
alpar@1073:   ///Sets the width of the border around the picture
alpar@1073:   ///
alpar@1073:   GraphToEps<T> &border(double b) {_xBorder=_yBorder=b;return *this;}
alpar@1073:   ///Sets the width of the border around the picture
alpar@1073: 
alpar@1073:   ///Sets the width of the border around the picture
alpar@1073:   ///
alpar@1073:   GraphToEps<T> &border(double x, double y) {
alpar@1073:     _xBorder=x;_yBorder=y;return *this;
alpar@1073:   }
alpar@1073:   ///Sets whether to draw arrows
alpar@1073: 
alpar@1073:   ///Sets whether to draw arrows
alpar@1073:   ///
alpar@1073:   GraphToEps<T> &drawArrows(bool b=true) {_drawArrows=b;return *this;}
alpar@1073:   ///Sets the length of the arrowheads
alpar@1073: 
alpar@1073:   ///Sets the length of the arrowheads
alpar@1073:   ///
alpar@1073:   GraphToEps<T> &arrowLength(double d) {_arrowLength*=d;return *this;}
alpar@1073:   ///Sets the width of the arrowheads
alpar@1073: 
alpar@1073:   ///Sets the width of the arrowheads
alpar@1073:   ///
alpar@1073:   GraphToEps<T> &arrowWidth(double d) {_arrowWidth*=d;return *this;}
alpar@1073:   
alpar@1103:   ///Scales the drawing to fit to A4 page
alpar@1103: 
alpar@1103:   ///Scales the drawing to fit to A4 page
alpar@1103:   ///
alpar@1103:   GraphToEps<T> &scaleToA4() {_scaleToA4=true;return *this;}
alpar@1103:   
alpar@1073:   ///Enables parallel edges
alpar@1073: 
alpar@1073:   ///Enables parallel edges
alpar@1073:   ///\todo Partially implemented
alpar@1073:   GraphToEps<T> &enableParallel(bool b=true) {_enableParallel=b;return *this;}
alpar@1073:   
alpar@1073:   ///Sets the distance 
alpar@1073:   
alpar@1073:   ///Sets the distance 
alpar@1073:   ///
alpar@1073:   GraphToEps<T> &parEdgeDist(double d) {_parEdgeDist*=d;return *this;}
alpar@1073:   
alpar@1073:   ///Hides the edges
alpar@1073:   
alpar@1073:   ///Hides the edges
alpar@1073:   ///
alpar@1073:   GraphToEps<T> &hideEdges(bool b=true) {_showEdges=!b;return *this;}
alpar@1073:   ///Hides the nodes
alpar@1073:   
alpar@1073:   ///Hides the nodes
alpar@1073:   ///
alpar@1073:   GraphToEps<T> &hideNodes(bool b=true) {_showNodes=!b;return *this;}
alpar@1073:   
alpar@1073:   ///Sets the size of the node texts
alpar@1073:   
alpar@1073:   ///Sets the size of the node texts
alpar@1073:   ///
alpar@1073:   GraphToEps<T> &nodeTextSize(double d) {_nodeTextSize=d;return *this;}
alpar@1178: 
alpar@1178:   ///Sets the color of the node texts to be different from the node color
alpar@1178: 
alpar@1178:   ///Sets the color of the node texts to be as different from the node color
alpar@1178:   ///as it is possible
alpar@1178:     ///
alpar@1178:   GraphToEps<T> &distantColorNodeTexts()
alpar@1178:   {_nodeTextColorType=DIST_COL;return *this;}
alpar@1178:   ///Sets the color of the node texts to be black or white and always visible.
alpar@1178: 
alpar@1178:   ///Sets the color of the node texts to be black or white according to
alpar@1178:   ///which is more 
alpar@1178:   ///different from the node color
alpar@1178:   ///
alpar@1178:   GraphToEps<T> &distantBWNodeTexts()
alpar@1178:   {_nodeTextColorType=DIST_BW;return *this;}
alpar@1178: 
alpar@1085:   ///Gives a preamble block for node Postscript block.
alpar@1085:   
alpar@1085:   ///Gives a preamble block for node Postscript block.
alpar@1085:   ///
alpar@1085:   ///\sa nodePsTexts()
alpar@1085:   GraphToEps<T> & nodePsTextsPreamble(const char *str) {
alpar@1234:     _nodePsTextsPreamble=str ;return *this;
alpar@1085:   }
alpar@1073:   ///Sets whether the the graph is undirected
alpar@1073: 
alpar@1073:   ///Sets whether the the graph is undirected
alpar@1073:   ///
alpar@1073:   GraphToEps<T> &undir(bool b=true) {_undir=b;return *this;}
alpar@1073:   ///Sets whether the the graph is directed
alpar@1073: 
alpar@1073:   ///Sets whether the the graph is directed.
alpar@1073:   ///Use it to show the undirected edges as a pair of directed ones.
alpar@1073:   GraphToEps<T> &bidir(bool b=true) {_undir=!b;return *this;}
alpar@1086: 
alpar@1108:   ///Sets the title.
alpar@1108: 
alpar@1108:   ///Sets the title of the generated image,
alpar@1108:   ///namely it inserts a <tt>%%Title:</tt> DSC field to the header of
alpar@1108:   ///the EPS file.
alpar@1108:   GraphToEps<T> &title(const std::string &t) {_title=t;return *this;}
alpar@1108:   ///Sets the copyright statement.
alpar@1108: 
alpar@1108:   ///Sets the copyright statement of the generated image,
alpar@1108:   ///namely it inserts a <tt>%%Copyright:</tt> DSC field to the header of
alpar@1108:   ///the EPS file.
alpar@1108:   ///\todo Multiline copyright notice could be supported.
alpar@1108:   GraphToEps<T> &copyright(const std::string &t) {_copyright=t;return *this;}
alpar@1108: 
alpar@1086: protected:
alpar@1086:   bool isInsideNode(xy<double> p, double r,int t) 
alpar@1086:   {
alpar@1086:     switch(t) {
alpar@1086:     case CIRCLE:
alpar@1086:       return p.normSquare()<=r*r;
alpar@1086:     case SQUARE:
alpar@1086:       return p.x<=r&&p.x>=-r&&p.y<=r&&p.y>=-r;
alpar@1088:     case DIAMOND:
alpar@1088:       return p.x+p.y<=r && p.x-p.y<=r && -p.x+p.y<=r && -p.x-p.y<=r;
alpar@1086:     }
alpar@1086:     return false;
alpar@1086:   }
alpar@1086: 
alpar@1086: public:
alpar@1091:   ~GraphToEps() { }
alpar@1091:   
alpar@1091:   ///Draws the graph.
alpar@1091: 
alpar@1091:   ///Like other functions using
alpar@1091:   ///\ref named-templ-func-param "named template parameters",
alpar@1091:   ///this function calles the algorithm itself, i.e. in this case
alpar@1091:   ///it draws the graph.
alpar@1091:   void run() {
alpar@1073:     if(dontPrint) return;
alpar@1073:     
alpar@1073:     os << "%!PS-Adobe-2.0 EPSF-2.0\n";
alpar@1108:     if(_title.size()>0) os << "%%Title: " << _title << '\n';
alpar@1108:      if(_copyright.size()>0) os << "%%Copyright: " << _copyright << '\n';
alpar@1107: //        << "%%Copyright: XXXX\n"
alpar@1108:     os << "%%Creator: LEMON GraphToEps function\n";
alpar@1108:     
alpar@1108:     {
alpar@1108:       char cbuf[50];
alpar@1108:       timeval tv;
alpar@1108:       gettimeofday(&tv, 0);
alpar@1108:       ctime_r(&tv.tv_sec,cbuf);
alpar@1108:       os << "%%CreationDate: " << cbuf;
alpar@1108:     }
alpar@1107:     ///\todo: Chech whether the graph is empty.
alpar@1073:     BoundingBox<double> bb;
alpar@1073:     for(NodeIt n(g);n!=INVALID;++n) {
alpar@1073:       double ns=_nodeSizes[n]*_nodeScale;
alpar@1073:       xy<double> p(ns,ns);
alpar@1073:       bb+=p+_coords[n];
alpar@1073:       bb+=-p+_coords[n];
alpar@1073:       }
alpar@1108:     if(_scaleToA4)
alpar@1108:       os <<"%%BoundingBox: 0 0 596 842\n%%DocumentPaperSizes: a4\n";
alpar@1108:     else os << "%%BoundingBox: "
alpar@1108: 	    << bb.left()*  _scale-_xBorder << ' '
alpar@1108: 	    << bb.bottom()*_scale-_yBorder << ' '
alpar@1108: 	    << bb.right()* _scale+_xBorder << ' '
alpar@1108: 	    << bb.top()*   _scale+_yBorder << '\n';
alpar@1108:     
alpar@1107:     os << "%%EndComments\n";
alpar@1107:     
alpar@1073:     //x1 y1 x2 y2 x3 y3 cr cg cb w
alpar@1073:     os << "/lb { setlinewidth setrgbcolor newpath moveto\n"
alpar@1073:        << "      4 2 roll 1 index 1 index curveto stroke } bind def\n";
alpar@1073:     os << "/l { setlinewidth setrgbcolor newpath moveto lineto stroke } bind def\n";
alpar@1086:     //x y r
alpar@1073:     os << "/c { newpath dup 3 index add 2 index moveto 0 360 arc closepath } bind def\n";
alpar@1086:     //x y r
alpar@1086:     os << "/sq { newpath 2 index 1 index add 2 index 2 index add moveto\n"
alpar@1086:        << "      2 index 1 index sub 2 index 2 index add lineto\n"
alpar@1086:        << "      2 index 1 index sub 2 index 2 index sub lineto\n"
alpar@1086:        << "      2 index 1 index add 2 index 2 index sub lineto\n"
alpar@1086:        << "      closepath pop pop pop} bind def\n";
alpar@1088:     //x y r
alpar@1088:     os << "/di { newpath 2 index 1 index add 2 index moveto\n"
alpar@1088:        << "      2 index             2 index 2 index add lineto\n"
alpar@1088:        << "      2 index 1 index sub 2 index             lineto\n"
alpar@1088:        << "      2 index             2 index 2 index sub lineto\n"
alpar@1088:        << "      closepath pop pop pop} bind def\n";
alpar@1073:     // x y r cr cg cb
alpar@1089:     os << "/nc { 0 0 0 setrgbcolor 5 index 5 index 5 index c fill\n"
alpar@1089:        << "     setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
alpar@1073:        << "   } bind def\n";
alpar@1089:     os << "/nsq { 0 0 0 setrgbcolor 5 index 5 index 5 index sq fill\n"
alpar@1089:        << "     setrgbcolor " << 1+_nodeBorderQuotient << " div sq fill\n"
alpar@1086:        << "   } bind def\n";
alpar@1089:     os << "/ndi { 0 0 0 setrgbcolor 5 index 5 index 5 index di fill\n"
alpar@1089:        << "     setrgbcolor " << 1+_nodeBorderQuotient << " div di fill\n"
alpar@1088:        << "   } bind def\n";
alpar@1073:     os << "/arrl " << _arrowLength << " def\n";
alpar@1073:     os << "/arrw " << _arrowWidth << " def\n";
alpar@1073:     // l dx_norm dy_norm
alpar@1073:     os << "/lrl { 2 index mul exch 2 index mul exch rlineto pop} bind def\n";
alpar@1073:     //len w dx_norm dy_norm x1 y1 cr cg cb
alpar@1073:     os << "/arr { setrgbcolor /y1 exch def /x1 exch def /dy exch def /dx exch def\n"
alpar@1073:        << "       /w exch def /len exch def\n"
alpar@1073:       //	 << "       0.1 setlinewidth x1 y1 moveto dx len mul dy len mul rlineto stroke"
alpar@1073:        << "       newpath x1 dy w 2 div mul add y1 dx w 2 div mul sub moveto\n"
alpar@1073:        << "       len w sub arrl sub dx dy lrl\n"
alpar@1073:        << "       arrw dy dx neg lrl\n"
alpar@1073:        << "       dx arrl w add mul dy w 2 div arrw add mul sub\n"
alpar@1073:        << "       dy arrl w add mul dx w 2 div arrw add mul add rlineto\n"
alpar@1073:        << "       dx arrl w add mul neg dy w 2 div arrw add mul sub\n"
alpar@1073:        << "       dy arrl w add mul neg dx w 2 div arrw add mul add rlineto\n"
alpar@1073:        << "       arrw dy dx neg lrl\n"
alpar@1073:        << "       len w sub arrl sub neg dx dy lrl\n"
alpar@1073:        << "       closepath fill } bind def\n";
alpar@1073:     os << "/cshow { 2 index 2 index moveto dup stringwidth pop\n"
alpar@1073:        << "         neg 2 div fosi .35 mul neg rmoveto show pop pop} def\n";
alpar@1073: 
alpar@1073:     os << "\ngsave\n";
alpar@1103:     if(_scaleToA4)
alpar@1103:       if(bb.height()>bb.width()) {
alpar@1103: 	double sc= min((A4HEIGHT-2*A4BORDER)/bb.height(),
alpar@1103: 		  (A4WIDTH-2*A4BORDER)/bb.width());
alpar@1103: 	os << ((A4WIDTH -2*A4BORDER)-sc*bb.width())/2 + A4BORDER << ' '
alpar@1103: 	   << ((A4HEIGHT-2*A4BORDER)-sc*bb.height())/2 + A4BORDER << " translate\n"
alpar@1103: 	   << sc << " dup scale\n"
alpar@1103: 	   << -bb.left() << ' ' << -bb.bottom() << " translate\n";
alpar@1103:       }
alpar@1103:       else {
alpar@1103: 	//\todo Verify centering
alpar@1103: 	double sc= min((A4HEIGHT-2*A4BORDER)/bb.width(),
alpar@1103: 		  (A4WIDTH-2*A4BORDER)/bb.height());
alpar@1103: 	os << ((A4WIDTH -2*A4BORDER)-sc*bb.height())/2 + A4BORDER << ' '
alpar@1103: 	   << ((A4HEIGHT-2*A4BORDER)-sc*bb.width())/2 + A4BORDER  << " translate\n"
alpar@1103: 	   << sc << " dup scale\n90 rotate\n"
alpar@1103: 	   << -bb.left() << ' ' << -bb.top() << " translate\n";	
alpar@1103: 	}
alpar@1103:     else if(_scale!=1.0) os << _scale << " dup scale\n";
alpar@1073:     
alpar@1085:     if(_showEdges) {
alpar@1085:       os << "%Edges:\ngsave\n";      
alpar@1073:       if(_enableParallel) {
alpar@1073: 	std::vector<Edge> el;
alpar@1073: 	for(EdgeIt e(g);e!=INVALID;++e)
alpar@1178: 	  if((!_undir||g.source(e)<g.target(e))&&_edgeWidths[e]>0)
alpar@1178: 	    el.push_back(e);
alpar@1073: 	sort(el.begin(),el.end(),edgeLess(g));
alpar@1073: 	
alpar@1073: 	typename std::vector<Edge>::iterator j;
alpar@1073: 	for(typename std::vector<Edge>::iterator i=el.begin();i!=el.end();i=j) {
alpar@1073: 	  for(j=i+1;j!=el.end()&&isParallel(*i,*j);++j) ;
alpar@1073: 
alpar@1073: 	  double sw=0;
alpar@1073: 	  for(typename std::vector<Edge>::iterator e=i;e!=j;++e)
alpar@1073: 	    sw+=_edgeWidths[*e]*_edgeWidthScale+_parEdgeDist;
alpar@1073: 	  sw-=_parEdgeDist;
alpar@1073: 	  sw/=-2.0;
alpar@1085: 	  xy<double> dvec(_coords[g.target(*i)]-_coords[g.source(*i)]);
deba@1417: 	  double l=std::sqrt(dvec.normSquare()); 
alpar@1360: 	  ///\todo better 'epsilon' would be nice here.
alpar@1366: 	  xy<double> d(dvec/std::max(l,1e-9));
alpar@1085:  	  xy<double> m;
alpar@1085: // 	  m=xy<double>(_coords[g.target(*i)]+_coords[g.source(*i)])/2.0;
alpar@1085: 
alpar@1085: //  	  m=xy<double>(_coords[g.source(*i)])+
alpar@1085: // 	    dvec*(double(_nodeSizes[g.source(*i)])/
alpar@1085: // 	       (_nodeSizes[g.source(*i)]+_nodeSizes[g.target(*i)]));
alpar@1085: 
alpar@1085:  	  m=xy<double>(_coords[g.source(*i)])+
alpar@1085: 	    d*(l+_nodeSizes[g.source(*i)]-_nodeSizes[g.target(*i)])/2.0;
alpar@1085: 
alpar@1073: 	  for(typename std::vector<Edge>::iterator e=i;e!=j;++e) {
alpar@1073: 	    sw+=_edgeWidths[*e]*_edgeWidthScale/2.0;
alpar@1202: 	    xy<double> mm=m+rot90(d)*sw/.75;
alpar@1073: 	    if(_drawArrows) {
alpar@1086: 	      int node_shape;
alpar@1073: 	      xy<double> s=_coords[g.source(*e)];
alpar@1073: 	      xy<double> t=_coords[g.target(*e)];
alpar@1073: 	      double rn=_nodeSizes[g.target(*e)]*_nodeScale;
alpar@1086: 	      node_shape=_nodeShapes[g.target(*e)];
alpar@1085: 	      Bezier3 bez(s,mm,mm,t);
alpar@1073: 	      double t1=0,t2=1;
alpar@1087: 	      for(int i=0;i<INTERPOL_PREC;++i)
alpar@1086: 		if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape)) t2=(t1+t2)/2;
alpar@1086: 		else t1=(t1+t2)/2;
alpar@1073: 	      xy<double> apoint=bez((t1+t2)/2);
alpar@1086: 	      rn = _arrowLength+_edgeWidths[*e]*_edgeWidthScale;
alpar@1073: 	      rn*=rn;
alpar@1086: 	      t2=(t1+t2)/2;t1=0;
alpar@1087: 	      for(int i=0;i<INTERPOL_PREC;++i)
alpar@1086: 		if((bez((t1+t2)/2)-apoint).normSquare()>rn) t1=(t1+t2)/2;
alpar@1073: 		else t2=(t1+t2)/2;
alpar@1073: 	      xy<double> linend=bez((t1+t2)/2);	      
alpar@1073: 	      bez=bez.before((t1+t2)/2);
alpar@1086: // 	      rn=_nodeSizes[g.source(*e)]*_nodeScale;
alpar@1086: // 	      node_shape=_nodeShapes[g.source(*e)];
alpar@1086: // 	      t1=0;t2=1;
alpar@1087: // 	      for(int i=0;i<INTERPOL_PREC;++i)
alpar@1086: // 		if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape)) t1=(t1+t2)/2;
alpar@1086: // 		else t2=(t1+t2)/2;
alpar@1086: // 	      bez=bez.after((t1+t2)/2);
alpar@1073: 	      os << _edgeWidths[*e]*_edgeWidthScale << " setlinewidth "
alpar@1073: 		 << _edgeColors[*e].getR() << ' '
alpar@1073: 		 << _edgeColors[*e].getG() << ' '
alpar@1073: 		 << _edgeColors[*e].getB() << " setrgbcolor newpath\n"
alpar@1073: 		 << bez.p1.x << ' ' <<  bez.p1.y << " moveto\n"
alpar@1073: 		 << bez.p2.x << ' ' << bez.p2.y << ' '
alpar@1073: 		 << bez.p3.x << ' ' << bez.p3.y << ' '
alpar@1073: 		 << bez.p4.x << ' ' << bez.p4.y << " curveto stroke\n";
alpar@1202: 	      xy<double> dd(rot90(linend-apoint));
alpar@1089: 	      dd*=(.5*_edgeWidths[*e]*_edgeWidthScale+_arrowWidth)/
deba@1417: 		std::sqrt(dd.normSquare());
alpar@1073: 	      os << "newpath " << psOut(apoint) << " moveto "
alpar@1073: 		 << psOut(linend+dd) << " lineto "
alpar@1073: 		 << psOut(linend-dd) << " lineto closepath fill\n";
alpar@1073: 	    }
alpar@1073: 	    else {
alpar@1073: 	      os << _coords[g.source(*e)].x << ' '
alpar@1073: 		 << _coords[g.source(*e)].y << ' '
alpar@1085: 		 << mm.x << ' ' << mm.y << ' '
alpar@1073: 		 << _coords[g.target(*e)].x << ' '
alpar@1073: 		 << _coords[g.target(*e)].y << ' '
alpar@1073: 		 << _edgeColors[*e].getR() << ' '
alpar@1073: 		 << _edgeColors[*e].getG() << ' '
alpar@1073: 		 << _edgeColors[*e].getB() << ' '
alpar@1073: 		 << _edgeWidths[*e]*_edgeWidthScale << " lb\n";
alpar@1073: 	    }
alpar@1073: 	    sw+=_edgeWidths[*e]*_edgeWidthScale/2.0+_parEdgeDist;
alpar@1073: 	  }
alpar@1073: 	}
alpar@1073:       }
alpar@1073:       else for(EdgeIt e(g);e!=INVALID;++e)
alpar@1178: 	if((!_undir||g.source(e)<g.target(e))&&_edgeWidths[e]>0)
alpar@1073: 	  if(_drawArrows) {
alpar@1073: 	    xy<double> d(_coords[g.target(e)]-_coords[g.source(e)]);
alpar@1087: 	    double rn=_nodeSizes[g.target(e)]*_nodeScale;
alpar@1087: 	    int node_shape=_nodeShapes[g.target(e)];
alpar@1087: 	    double t1=0,t2=1;
alpar@1087: 	    for(int i=0;i<INTERPOL_PREC;++i)
alpar@1087: 	      if(isInsideNode((-(t1+t2)/2)*d,rn,node_shape)) t1=(t1+t2)/2;
alpar@1087: 	      else t2=(t1+t2)/2;
alpar@1073: 	    double l=sqrt(d.normSquare());
alpar@1073: 	    d/=l;
alpar@1087: 	    
alpar@1087: 	    os << l*(1-(t1+t2)/2) << ' '
alpar@1073: 	       << _edgeWidths[e]*_edgeWidthScale << ' '
alpar@1073: 	       << d.x << ' ' << d.y << ' '
alpar@1087: 	       << _coords[g.source(e)].x << ' '
alpar@1087: 	       << _coords[g.source(e)].y << ' '
alpar@1073: 	       << _edgeColors[e].getR() << ' '
alpar@1073: 	       << _edgeColors[e].getG() << ' '
alpar@1073: 	       << _edgeColors[e].getB() << " arr\n";
alpar@1073: 	  }
alpar@1073: 	  else os << _coords[g.source(e)].x << ' '
alpar@1073: 		  << _coords[g.source(e)].y << ' '
alpar@1073: 		  << _coords[g.target(e)].x << ' '
alpar@1073: 		  << _coords[g.target(e)].y << ' '
alpar@1073: 		  << _edgeColors[e].getR() << ' '
alpar@1073: 		  << _edgeColors[e].getG() << ' '
alpar@1073: 		  << _edgeColors[e].getB() << ' '
alpar@1073: 		  << _edgeWidths[e]*_edgeWidthScale << " l\n";
alpar@1085:       os << "grestore\n";
alpar@1085:     }
alpar@1085:     if(_showNodes) {
alpar@1085:       os << "%Nodes:\ngsave\n";
alpar@1086:       for(NodeIt n(g);n!=INVALID;++n) {
alpar@1073: 	os << _coords[n].x << ' ' << _coords[n].y << ' '
alpar@1073: 	   << _nodeSizes[n]*_nodeScale << ' '
alpar@1073: 	   << _nodeColors[n].getR() << ' '
alpar@1073: 	   << _nodeColors[n].getG() << ' '
alpar@1086: 	   << _nodeColors[n].getB() << ' ';
alpar@1086: 	switch(_nodeShapes[n]) {
alpar@1086: 	case CIRCLE:
alpar@1086: 	  os<< "nc";break;
alpar@1086: 	case SQUARE:
alpar@1086: 	  os<< "nsq";break;
alpar@1088: 	case DIAMOND:
alpar@1088: 	  os<< "ndi";break;
alpar@1086: 	}
alpar@1086: 	os<<'\n';
alpar@1086:       }
alpar@1085:       os << "grestore\n";
alpar@1085:     }
alpar@1073:     if(_showNodeText) {
alpar@1085:       os << "%Node texts:\ngsave\n";
alpar@1073:       os << "/fosi " << _nodeTextSize << " def\n";
alpar@1073:       os << "(Helvetica) findfont fosi scalefont setfont\n";
alpar@1178:       for(NodeIt n(g);n!=INVALID;++n) {
alpar@1178: 	switch(_nodeTextColorType) {
alpar@1178: 	case DIST_COL:
alpar@1178: 	  os << psOut(distantColor(_nodeColors[n])) << " setrgbcolor\n";
alpar@1178: 	  break;
alpar@1178: 	case DIST_BW:
alpar@1178: 	  os << psOut(distantBW(_nodeColors[n])) << " setrgbcolor\n";
alpar@1178: 	  break;
alpar@1178: 	case CUST_COL:
alpar@1178: 	  os << psOut(distantColor(_nodeTextColors[n])) << " setrgbcolor\n";
alpar@1178: 	  break;
alpar@1178: 	default:
alpar@1178: 	  os << "0 0 0 setrgbcolor\n";
alpar@1178: 	}
alpar@1073: 	os << _coords[n].x << ' ' << _coords[n].y
alpar@1073: 	   << " (" << _nodeTexts[n] << ") cshow\n";
alpar@1178:       }
alpar@1085:       os << "grestore\n";
alpar@1073:     }
alpar@1085:     if(_showNodePsText) {
alpar@1085:       os << "%Node PS blocks:\ngsave\n";
alpar@1085:       for(NodeIt n(g);n!=INVALID;++n)
alpar@1085: 	os << _coords[n].x << ' ' << _coords[n].y
alpar@1085: 	   << " moveto\n" << _nodePsTexts[n] << "\n";
alpar@1085:       os << "grestore\n";
alpar@1085:     }
alpar@1085:     
alpar@1103:     os << "grestore\nshowpage\n";
alpar@1073: 
alpar@1073:     //CleanUp:
alpar@1073:     if(_pleaseRemoveOsStream) {delete &os;}
alpar@1073:   } 
alpar@1073: };
alpar@1073: 
alpar@1073: 
alpar@1073: ///Generates an EPS file from a graph
alpar@1073: 
alpar@1287: ///\ingroup io_group
alpar@1073: ///Generates an EPS file from a graph.
alpar@1073: ///\param g is a reference to the graph to be printed
alpar@1073: ///\param os is a reference to the output stream.
alpar@1073: ///By default it is <tt>std::cout</tt>
alpar@1073: ///
alpar@1091: ///This function also has a lot of
alpar@1091: ///\ref named-templ-func-param "named parameters",
alpar@1073: ///they are declared as the members of class \ref GraphToEps. The following
alpar@1073: ///example shows how to use these parameters.
alpar@1073: ///\code
alpar@1178: /// graphToEps(g,os).scale(10).coords(coords)
alpar@1073: ///              .nodeScale(2).nodeSizes(sizes)
alpar@1091: ///              .edgeWidthScale(.4).run();
alpar@1073: ///\endcode
alpar@1091: ///\warning Don't forget to put the \ref GraphToEps::run() "run()"
alpar@1091: ///to the end of the parameter list.
alpar@1073: ///\sa GraphToEps
alpar@1073: ///\sa graphToEps(G &g, char *file_name)
alpar@1073: template<class G>
alpar@1073: GraphToEps<DefaultGraphToEpsTraits<G> > 
alpar@1073: graphToEps(G &g, std::ostream& os=std::cout)
alpar@1073: {
alpar@1073:   return 
alpar@1073:     GraphToEps<DefaultGraphToEpsTraits<G> >(DefaultGraphToEpsTraits<G>(g,os));
alpar@1073: }
alpar@1073:  
alpar@1073: ///Generates an EPS file from a graph
alpar@1073: 
alpar@1103: ///\ingroup misc
alpar@1073: ///This function does the same as
alpar@1073: ///\ref graphToEps(G &g,std::ostream& os)
alpar@1073: ///but it writes its output into the file \c file_name
alpar@1073: ///instead of a stream.
alpar@1073: ///\sa graphToEps(G &g, std::ostream& os)
alpar@1073: template<class G>
alpar@1073: GraphToEps<DefaultGraphToEpsTraits<G> > 
alpar@1107: graphToEps(G &g,const char *file_name)
alpar@1073: {
alpar@1073:   return GraphToEps<DefaultGraphToEpsTraits<G> >
alpar@1073:     (DefaultGraphToEpsTraits<G>(g,*new std::ofstream(file_name),true));
alpar@1073: }
alpar@1073: 
alpar@1073: } //END OF NAMESPACE LEMON
alpar@1073: 
alpar@1073: #endif // LEMON_GRAPH_TO_EPS_H