lemon-0.x: src/work/alpar/graph_to

     1 #include <iostream>

     2 #include<math.h>

     4 #include<lemon/xy.h>

     5 #include<lemon/maps.h>

     6 #include<lemon/list_graph.h>

     9 ///\file \ingroup misc

    10 ///Simple graph drawer

    12 namespace lemon {

    14 ///Data structure representing RGB colors.

    16 ///Data structure representing RGB colors.

    17 ///\ingroup misc

    18 class Color

    19 {

    20   double _r,_g,_b;

    21 public:

    22   ///Default constructor

    23   Color() {}

    24   ///Constructor

    25   Color(double r,double g,double b) :_r(r),_g(g),_b(b) {};

    26   ///Returns the red component

    27   double getR() {return _r;}

    28   ///Returns the green component

    29   double getG() {return _g;}

    30   ///Returns the blue component

    31   double getB() {return _b;}

    32   ///Set the color components

    33   void set(double r,double g,double b) { _r=r;_g=g;_b=b; };

    34 };

    36 ///Default traits class of \ref GraphToEps

    38 ///Default traits class of \ref GraphToEps

    39 ///

    40 ///\c G is the type of the underlying graph.

    41 template<class G>

    42 struct DefaultGraphToEpsTraits

    43 {

    44   typedef G Graph;

    45   typedef typename Graph::Node Node;

    46   typedef typename Graph::NodeIt NodeIt;

    47   typedef typename Graph::Edge Edge;

    48   typedef typename Graph::EdgeIt EdgeIt;

    49   typedef typename Graph::InEdgeIt InEdgeIt;

    50   typedef typename Graph::OutEdgeIt OutEdgeIt;

    53   const Graph &g;

    55   std::ostream& os;

    57   ConstMap<typename Graph::Node,xy<double> > _coords;

    58   ConstMap<typename Graph::Node,double > _nodeSizes;

    60   ConstMap<typename Graph::Node,Color > _nodeColors;

    61   ConstMap<typename Graph::Edge,Color > _edgeColors;

    63   ConstMap<typename Graph::Edge,double > _edgeWidths;

    65   double _edgeWidthScale;

    67   double _nodeScale;

    68   double _xBorder, _yBorder;

    69   double _scale;

    70   double _nodeBorderQuotient;

    72   bool _drawArrows;

    73   double _arrowLength, _arrowWidth;

    75   ///Constructor

    77   ///Constructor

    78   ///\param _g is a reference to the graph to be printed

    79   ///\param _os is a reference to the output stream.

    80   ///By default it is <tt>std::cout</tt>

    81   DefaultGraphToEpsTraits(const G &_g,std::ostream& _os=std::cout) :

    82     g(_g), os(_os),

    83     _coords(xy<double>(1,1)), _nodeSizes(1.0),

    84     _nodeColors(Color(1,1,1)), _edgeColors(Color(0,0,0)),

    85     _edgeWidths(1), _edgeWidthScale(0.3),

    86     _nodeScale(1.0), _xBorder(10), _yBorder(10), _scale(1.0),

    87     _nodeBorderQuotient(.1),

    88     _drawArrows(false), _arrowLength(1), _arrowWidth(0.3) {}

    89 };

    91 ///Helper class to implement the named parameters of \ref graphToEps()

    93 ///Helper class to implement the named parameters of \ref graphToEps()

    94 ///\todo Is 'helper class' a good name for this?

    95 ///

    96 template<class T> class GraphToEps : public T

    97 {

    98   typedef typename T::Graph Graph;

    99   typedef typename Graph::Node Node;

   100   typedef typename Graph::NodeIt NodeIt;

   101   typedef typename Graph::Edge Edge;

   102   typedef typename Graph::EdgeIt EdgeIt;

   103   typedef typename Graph::InEdgeIt InEdgeIt;

   104   typedef typename Graph::OutEdgeIt OutEdgeIt;

   106   bool dontPrint;

   108 public:

   109   GraphToEps(const T &t) : T(t), dontPrint(false) {};

   111   template<class X> struct CoordsTraits : public T {

   112     const X &_coords;

   113     CoordsTraits(const T &t,const X &x) : T(t), _coords(x) {}

   114   };

   115   ///Sets the map of the node coordinates

   117   ///Sets the map of the node coordinates.

   118   ///\param x must be a node map with xy<double> or xy<int> values.

   119   template<class X> GraphToEps<CoordsTraits<X> > coords(const X &x) {

   120     dontPrint=true;

   121     return GraphToEps<CoordsTraits<X> >(CoordsTraits<X>(*this,x));

   122   }

   123   template<class X> struct NodeSizesTraits : public T {

   124     const X &_nodeSizes;

   125     NodeSizesTraits(const T &t,const X &x) : T(t), _nodeSizes(x) {}

   126   };

   127   ///Sets the map of the node sizes

   129   ///Sets the map of the node sizes

   130   ///\param x must be a node map with \c double (or convertible) values.

   131   template<class X> GraphToEps<NodeSizesTraits<X> > nodeSizes(const X &x)

   132   {

   133     dontPrint=true;

   134     return GraphToEps<NodeSizesTraits<X> >(NodeSizesTraits<X>(*this,x));

   135   }

   136    template<class X> struct EdgeWidthsTraits : public T {

   137     const X &_edgeWidths;

   138     EdgeWidthsTraits(const T &t,const X &x) : T(t), _edgeWidths(x) {}

   139   };

   140   ///Sets the map of the edge widths

   142   ///Sets the map of the edge widths

   143   ///\param x must be a edge map with \c double (or convertible) values.

   144   template<class X> GraphToEps<EdgeWidthsTraits<X> > edgeWidths(const X &x)

   145   {

   146     dontPrint=true;

   147     return GraphToEps<EdgeWidthsTraits<X> >(EdgeWidthsTraits<X>(*this,x));

   148   }

   150   template<class X> struct NodeColorsTraits : public T {

   151     const X &_nodeColors;

   152     NodeColorsTraits(const T &t,const X &x) : T(t), _nodeColors(x) {}

   153   };

   154   ///Sets the map of the node colors

   156   ///Sets the map of the node colors

   157   ///\param x must be a node map with \ref Color values.

   158   template<class X> GraphToEps<NodeColorsTraits<X> >

   159   nodeColors(const X &x)

   160   {

   161     dontPrint=true;

   162     return GraphToEps<NodeColorsTraits<X> >(NodeColorsTraits<X>(*this,x));

   163   }

   164   template<class X> struct EdgeColorsTraits : public T {

   165     const X &_edgeColors;

   166     EdgeColorsTraits(const T &t,const X &x) : T(t), _edgeColors(x) {}

   167   };

   168   ///Sets the map of the edge colors

   170   ///Sets the map of the edge colors

   171   ///\param x must be a edge map with \ref Color values.

   172   template<class X> GraphToEps<EdgeColorsTraits<X> >

   173   edgeColors(const X &x)

   174   {

   175     dontPrint=true;

   176     return GraphToEps<EdgeColorsTraits<X> >(EdgeColorsTraits<X>(*this,x));

   177   }

   178   ///Sets a global scale factor for node sizes

   180   ///Sets a global scale factor for node sizes

   181   ///

   182   GraphToEps<T> &nodeScale(double d) {_nodeScale=d;return *this;}

   183   ///Sets a global scale factor for edge widths

   185   ///Sets a global scale factor for edge widths

   186   ///

   187   GraphToEps<T> &edgeWidthScale(double d) {_edgeWidthScale=d;return *this;}

   188   ///Sets a global scale factor for the whole picture

   190   ///Sets a global scale factor for the whole picture

   191   ///

   192   GraphToEps<T> &scale(double d) {_scale=d;return *this;}

   193   ///Sets the width of the border around the picture

   195   ///Sets the width of the border around the picture

   196   ///

   197   GraphToEps<T> &border(double b) {_xBorder=_yBorder=b;return *this;}

   198   ///Sets the width of the border around the picture

   200   ///Sets the width of the border around the picture

   201   ///

   202   GraphToEps<T> &border(double x, double y) {

   203     _xBorder=x;_yBorder=y;return *this;

   204   }

   205   ///Sets whether to draw arrows

   207   ///Sets whether to draw arrows

   208   ///

   209   GraphToEps<T> &drawArrows(bool b=true) {_drawArrows=b;return *this;}

   210   ///Sets the length of the arrowheads

   212   ///Sets the length of the arrowheads

   213   ///

   214   GraphToEps<T> &arrowLength(double d) {_arrowLength*=d;return *this;}

   215   ///Sets the width of the arrowheads

   217   ///Sets the width of the arrowheads

   218   ///

   219   GraphToEps<T> &arrowWidth(double d) {_arrowWidth*=d;return *this;}

   221   ~GraphToEps()

   222   {

   223     if(dontPrint) return;

   225     os << "%!PS-Adobe-2.0 EPSF-2.0\n";

   226     //\todo: Chech whether the graph is empty.

   227     BoundingBox<double> bb;

   228     for(NodeIt n(g);n!=INVALID;++n) {

   229       double ns=_nodeSizes[n]*_nodeScale;

   230       xy<double> p(ns,ns);

   231       bb+=p+_coords[n];

   232       bb+=-p+_coords[n];

   233       }

   234     os << "%%BoundingBox: "

   235 	 << bb.left()*  _scale-_xBorder << ' '

   236 	 << bb.bottom()*_scale-_yBorder << ' '

   237 	 << bb.right()* _scale+_xBorder << ' '

   238 	 << bb.top()*   _scale+_yBorder << '\n';

   239     //x1 y1 x2 y2 cr cg cb w

   240     os << "/l { setlinewidth setrgbcolor newpath moveto lineto stroke } bind def\n";

   241     os << "/c { newpath dup 3 index add 2 index moveto 0 360 arc } bind def\n";

   242     // x y r cr cg cb

   243     os << "/n { setrgbcolor 2 index 2 index 2 index c fill\n"

   244 	 << "     0 0 0 setrgbcolor dup "

   245 	 << _nodeBorderQuotient << " mul setlinewidth "

   246 	 << 1+_nodeBorderQuotient/2 << " div c stroke\n"

   247 	 << "   } bind def\n";

   248     os << "/arrl " << _arrowLength << " def\n";

   249     os << "/arrw " << _arrowWidth << " def\n";

   250     // l dx_norm dy_norm

   251     os << "/lrl { 2 index mul exch 2 index mul exch rlineto pop} bind def\n";

   252     //len w dx_norm dy_norm x1 y1 cr cg cb

   253     os << "/arr { setrgbcolor /y1 exch def /x1 exch def /dy exch def /dx exch def\n"

   254 	 << "       /w exch def /len exch def\n"

   255       //	 << "       0.1 setlinewidth x1 y1 moveto dx len mul dy len mul rlineto stroke"

   256 	 << "       newpath x1 dy w 2 div mul add y1 dx w 2 div mul sub moveto\n"

   257 	 << "       len w sub arrl sub dx dy lrl\n"

   258 	 << "       arrw dy dx neg lrl\n"

   259 	 << "       dx arrl w add mul dy w 2 div arrw add mul sub\n"

   260 	 << "       dy arrl w add mul dx w 2 div arrw add mul add rlineto\n"

   261 	 << "       dx arrl w add mul neg dy w 2 div arrw add mul sub\n"

   262 	 << "       dy arrl w add mul neg dx w 2 div arrw add mul add rlineto\n"

   263 	 << "       arrw dy dx neg lrl\n"

   264 	 << "       len w sub arrl sub neg dx dy lrl\n"

   265 	 << "       closepath fill } bind def\n";

   266     os << "\ngsave\n";

   267     if(_scale!=1.0) os << _scale << " dup scale\n";

   268     os << "%Edges:\ngsave\n";

   269     for(NodeIt n(g);n!=INVALID;++n)

   270       for(OutEdgeIt e(g,n);e!=INVALID;++e)

   271 	if(_drawArrows) {

   272 	  xy<double> d(_coords[g.target(e)]-_coords[g.source(e)]);

   273 	  double l=sqrt(d.normSquare());

   274 	  d/=l;

   275 	  xy<double> x1(d*_nodeScale*_nodeSizes[g.source(e)]+

   276 			_coords[g.source(e)]);

   277 	  os << l-(_nodeSizes[g.source(e)]+

   278 		     _nodeSizes[g.target(e)])*_nodeScale << ' '

   279 	       << _edgeWidths[e]*_edgeWidthScale << ' '

   280 	       << d.x << ' ' << d.y << ' '

   281 	       << x1.x << ' ' << x1.y << ' '

   282 	       << _edgeColors[e].getR() << ' '

   283 	       << _edgeColors[e].getG() << ' '

   284 	       << _edgeColors[e].getB() << " arr\n";

   285 	}

   286     	else os << _coords[g.source(e)].x << ' '

   287 		  << _coords[g.source(e)].y << ' '

   288 		  << _coords[g.target(e)].x << ' '

   289 		  << _coords[g.target(e)].y << ' '

   290 		  << _edgeColors[e].getR() << ' '

   291 		  << _edgeColors[e].getG() << ' '

   292 		  << _edgeColors[e].getB() << ' '

   293 		  << _edgeWidths[e]*_edgeWidthScale << " l\n";

   294     os << "grestore\n%Nodes:\ngsave\n";

   295     for(NodeIt n(g);n!=INVALID;++n)

   296       os << _coords[n].x << ' ' << _coords[n].y << ' '

   297 	   << _nodeSizes[n]*_nodeScale << ' '

   298 	   << _nodeColors[n].getR() << ' '

   299 	   << _nodeColors[n].getG() << ' '

   300 	   << _nodeColors[n].getB() << " n\n";

   301     os << "grestore\ngrestore\n";

   302   }

   303 };

   306 ///Generates an EPS file from a graph

   308 ///\ingroup misc

   309 ///Generates an EPS file from a graph.

   310 ///\param g is a reference to the graph to be printed

   311 ///\param os is a reference to the output stream.

   312 ///By default it is <tt>std::cout</tt>

   313 ///

   314 ///This function also has a lot of \ref named-templ-param "named parameters",

   315 ///they are declared as the members of class \ref GraphToEps. The following

   316 ///example shows how to use these parameters.

   317 ///\code

   318 /// graphToEps(g).scale(10).coords(coords)

   319 ///              .nodeScale(2).nodeSizes(sizes)

   320 ///              .edgeWidthScale(.4);

   321 ///\endcode

   322 ///\sa GraphToEps

   323 template<class G>

   324 GraphToEps<DefaultGraphToEpsTraits<G> > graphToEps(G &g,std::ostream& os=std::cout)

   325 {

   326   return GraphToEps<DefaultGraphToEpsTraits<G> >(DefaultGraphToEpsTraits<G>(g));

   327 }

   329 }

   331 using namespace lemon;

   333 class ColorSet : public MapBase<int,Color>

   334 {

   335 public:

   336   Color operator[](int i) const

   337   {

   338     switch(i%8){

   339     case 0: return Color(0,0,0);

   340     case 1: return Color(1,0,0);

   341     case 2: return Color(0,1,0);

   342     case 3: return Color(0,0,1);

   343     case 4: return Color(1,1,0);

   344     case 5: return Color(1,0,1);

   345     case 6: return Color(0,1,1);

   346     case 7: return Color(1,1,1);

   347     }

   348     return Color(0,0,0);

   349   }

   350 } colorSet;

   352 int main()

   353 {

   354   ListGraph g;

   355   typedef ListGraph::Node Node;

   356   typedef ListGraph::NodeIt NodeIt;

   357   typedef ListGraph::Edge Edge;

   358   typedef xy<int> Xy;

   360   Node n1=g.addNode();

   361   Node n2=g.addNode();

   362   Node n3=g.addNode();

   363   Node n4=g.addNode();

   364   Node n5=g.addNode();

   366   ListGraph::NodeMap<Xy> coords(g);

   367   ListGraph::NodeMap<double> sizes(g);

   368   ListGraph::NodeMap<int> colors(g);

   369   ListGraph::EdgeMap<int> ecolors(g);

   370   ListGraph::EdgeMap<int> widths(g);

   372   coords[n1]=Xy(50,50);  sizes[n1]=1; colors[n1]=1;

   373   coords[n2]=Xy(50,70);  sizes[n2]=2; colors[n2]=2;

   374   coords[n3]=Xy(70,70);  sizes[n3]=1; colors[n3]=3;

   375   coords[n4]=Xy(70,50);  sizes[n4]=2; colors[n4]=4;

   376   coords[n5]=Xy(85,60);  sizes[n5]=3; colors[n5]=5;

   378   Edge e;

   380   e=g.addEdge(n1,n2); ecolors[e]=0; widths[e]=1;

   381   e=g.addEdge(n2,n3); ecolors[e]=0; widths[e]=1;

   382   e=g.addEdge(n3,n5); ecolors[e]=0; widths[e]=3;

   383   e=g.addEdge(n5,n4); ecolors[e]=0; widths[e]=1;

   384   e=g.addEdge(n4,n1); ecolors[e]=0; widths[e]=1;

   385   e=g.addEdge(n2,n4); ecolors[e]=1; widths[e]=2;

   386   e=g.addEdge(n3,n4); ecolors[e]=2; widths[e]=1;

   388   graphToEps(g).scale(10).coords(coords).

   389     nodeScale(2).nodeSizes(sizes).

   390     nodeColors(composeMap(colorSet,colors)).

   391     edgeColors(composeMap(colorSet,ecolors)).

   392     edgeWidthScale(.4).edgeWidths(widths).

   393     drawArrows().arrowWidth(1).arrowLength(1)

   394     ;

   395 }

author	alpar
	Wed, 05 Jan 2005 10:14:37 +0000
changeset 1051	4ebe32765b48
parent 1050	bcc0766a7b86
child 1055	f901ff02b2d7
permissions	-rw-r--r--