2 * lemon/graph_to_eps.h - Part of LEMON, a generic C++ optimization library
4 * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
5 * (Egervary Research Group on Combinatorial Optimization, EGRES).
7 * Permission to use, modify and distribute this software is granted
8 * provided that this copyright notice appears in all copies. For
9 * precise terms see the accompanying LICENSE file.
11 * This software is provided "AS IS" with no warranty of any kind,
12 * express or implied, and with no claim as to its suitability for any
17 #ifndef LEMON_GRAPH_TO_EPS_H
18 #define LEMON_GRAPH_TO_EPS_H
31 #include<lemon/invalid.h>
33 #include<lemon/maps.h>
34 #include<lemon/bezier.h>
39 ///\brief Simple graph drawer
41 ///\author Alpar Juttner
45 ///Data structure representing RGB colors.
47 ///Data structure representing RGB colors.
53 ///Default constructor
56 Color(double r,double g,double b) :_r(r),_g(g),_b(b) {};
57 ///Returns the red component
59 ///\todo \c red() could be a better name...
60 double getR() const {return _r;}
61 ///Returns the green component
62 double getG() const {return _g;}
63 ///Returns the blue component
64 double getB() const {return _b;}
65 ///Set the color components
66 void set(double r,double g,double b) { _r=r;_g=g;_b=b; };
69 ///Maps <tt>int</tt>s to different \ref Color "Color"s
71 ///This map assigns one of the predefined \ref Color "Color"s
72 ///to each <tt>int</tt>. It is possible to change the colors as well as their
73 ///number. The integer range is cyclically mapped to the provided set of colors.
75 ///This is a true \ref concept::ReferenceMap "reference map", so you can also
76 ///change the actual colors.
78 class ColorSet : public MapBase<int,Color>
80 std::vector<Color> colors;
85 ///\param have_white indicates wheter white is
86 ///amongst the provided color (\c true) or not (\c false). If it is true,
87 ///white will be assigned to \c 0.
88 ///\param num the number of the allocated colors. If it is \c 0
89 ///the default color configuration is set up (26 color plus the while).
90 ///If \c num is less then 26/27 then the default color list is cut. Otherwise
91 ///the color list is filled repeatedly with the default color list.
92 ColorSet(bool have_white=false,int num=0)
95 if(have_white) colors.push_back(Color(1,1,1));
97 colors.push_back(Color(0,0,0));
98 colors.push_back(Color(1,0,0));
99 colors.push_back(Color(0,1,0));
100 colors.push_back(Color(0,0,1));
101 colors.push_back(Color(1,1,0));
102 colors.push_back(Color(1,0,1));
103 colors.push_back(Color(0,1,1));
105 colors.push_back(Color(.5,0,0));
106 colors.push_back(Color(0,.5,0));
107 colors.push_back(Color(0,0,.5));
108 colors.push_back(Color(.5,.5,0));
109 colors.push_back(Color(.5,0,.5));
110 colors.push_back(Color(0,.5,.5));
112 colors.push_back(Color(.5,.5,.5));
113 colors.push_back(Color(1,.5,.5));
114 colors.push_back(Color(.5,1,.5));
115 colors.push_back(Color(.5,.5,1));
116 colors.push_back(Color(1,1,.5));
117 colors.push_back(Color(1,.5,1));
118 colors.push_back(Color(.5,1,1));
120 colors.push_back(Color(1,.5,0));
121 colors.push_back(Color(.5,1,0));
122 colors.push_back(Color(1,0,.5));
123 colors.push_back(Color(0,1,.5));
124 colors.push_back(Color(0,.5,1));
125 colors.push_back(Color(.5,0,1));
126 } while(int(colors.size())<num);
127 // colors.push_back(Color(1,1,1));
128 if(num>0) colors.resize(num);
131 Color &operator[](int i)
133 return colors[i%colors.size()];
136 const Color &operator[](int i) const
138 return colors[i%colors.size()];
141 void set(int i,const Color &c)
143 colors[i%colors.size()]=c;
145 ///Sets the number of the exiting colors.
146 void resize(int s) { colors.resize(s);}
147 ///Returns the munber of the existing colors.
148 std::size_t size() const { return colors.size();}
151 ///Returns a visible distinct \ref Color
153 ///Returns a \ref Color which is as different from the given parameter
154 ///as it is possible.
155 inline Color distantColor(const Color &c)
157 return Color(c.getR()<.5?1:0,c.getG()<.5?1:0,c.getB()<.5?1:0);
159 ///Returns black for light colors and white for the dark ones.
161 ///Returns black for light colors and white for the dark ones.
162 ///\todo weighted average would be better
163 inline Color distantBW(const Color &c){
164 double v=(.2125*c.getR()+.7154*c.getG()+.0721*c.getB())<.5?1:0;
168 ///Default traits class of \ref GraphToEps
170 ///Default traits class of \ref GraphToEps
172 ///\c G is the type of the underlying graph.
174 struct DefaultGraphToEpsTraits
177 typedef typename Graph::Node Node;
178 typedef typename Graph::NodeIt NodeIt;
179 typedef typename Graph::Edge Edge;
180 typedef typename Graph::EdgeIt EdgeIt;
181 typedef typename Graph::InEdgeIt InEdgeIt;
182 typedef typename Graph::OutEdgeIt OutEdgeIt;
189 ConstMap<typename Graph::Node,xy<double> > _coords;
190 ConstMap<typename Graph::Node,double > _nodeSizes;
191 ConstMap<typename Graph::Node,int > _nodeShapes;
193 ConstMap<typename Graph::Node,Color > _nodeColors;
194 ConstMap<typename Graph::Edge,Color > _edgeColors;
196 ConstMap<typename Graph::Edge,double > _edgeWidths;
198 double _edgeWidthScale;
201 double _xBorder, _yBorder;
203 double _nodeBorderQuotient;
206 double _arrowLength, _arrowWidth;
208 bool _showNodes, _showEdges;
210 bool _enableParallel;
214 ConstMap<typename Graph::Node,bool > _nodeTexts;
215 double _nodeTextSize;
217 bool _showNodePsText;
218 ConstMap<typename Graph::Node,bool > _nodePsTexts;
219 char *_nodePsTextsPreamble;
222 bool _pleaseRemoveOsStream;
227 std::string _copyright;
229 enum NodeTextColorType
230 { DIST_COL=0, DIST_BW=1, CUST_COL=2, SAME_COL=3 } _nodeTextColorType;
231 ConstMap<typename Graph::Node,Color > _nodeTextColors;
236 ///\param _g is a reference to the graph to be printed
237 ///\param _os is a reference to the output stream.
238 ///\param _os is a reference to the output stream.
239 ///\param _pros If it is \c true, then the \c ostream referenced by \c _os
240 ///will be explicitly deallocated by the destructor.
241 ///By default it is <tt>std::cout</tt>
242 DefaultGraphToEpsTraits(const G &_g,std::ostream& _os=std::cout,
245 _coords(xy<double>(1,1)), _nodeSizes(1.0), _nodeShapes(0),
246 _nodeColors(Color(1,1,1)), _edgeColors(Color(0,0,0)),
247 _edgeWidths(1), _edgeWidthScale(0.3),
248 _nodeScale(1.0), _xBorder(10), _yBorder(10), _scale(1.0),
249 _nodeBorderQuotient(.1),
250 _drawArrows(false), _arrowLength(1), _arrowWidth(0.3),
251 _showNodes(true), _showEdges(true),
252 _enableParallel(false), _parEdgeDist(1),
253 _showNodeText(false), _nodeTexts(false), _nodeTextSize(1),
254 _showNodePsText(false), _nodePsTexts(false), _nodePsTextsPreamble(0),
256 _pleaseRemoveOsStream(_pros), _scaleToA4(false),
257 _nodeTextColorType(SAME_COL), _nodeTextColors(Color(0,0,0))
261 ///Helper class to implement the named parameters of \ref graphToEps()
263 ///Helper class to implement the named parameters of \ref graphToEps()
264 ///\todo Is 'helper class' a good name for this?
266 ///\todo Follow PostScript's DSC.
267 /// Use own dictionary.
268 ///\todo Useful new features.
269 /// - Linestyles: dotted, dashed etc.
270 /// - A second color and percent value for the lines.
271 template<class T> class GraphToEps : public T
273 // Can't believe it is required by the C++ standard
279 using T::_nodeShapes;
280 using T::_nodeColors;
281 using T::_edgeColors;
282 using T::_edgeWidths;
284 using T::_edgeWidthScale;
289 using T::_nodeBorderQuotient;
291 using T::_drawArrows;
292 using T::_arrowLength;
293 using T::_arrowWidth;
298 using T::_enableParallel;
299 using T::_parEdgeDist;
301 using T::_showNodeText;
303 using T::_nodeTextSize;
305 using T::_showNodePsText;
306 using T::_nodePsTexts;
307 using T::_nodePsTextsPreamble;
310 using T::_pleaseRemoveOsStream;
317 using T::NodeTextColorType;
321 using T::_nodeTextColorType;
322 using T::_nodeTextColors;
323 // dradnats ++C eht yb deriuqer si ti eveileb t'naC
325 typedef typename T::Graph Graph;
326 typedef typename Graph::Node Node;
327 typedef typename Graph::NodeIt NodeIt;
328 typedef typename Graph::Edge Edge;
329 typedef typename Graph::EdgeIt EdgeIt;
330 typedef typename Graph::InEdgeIt InEdgeIt;
331 typedef typename Graph::OutEdgeIt OutEdgeIt;
333 static const int INTERPOL_PREC;
334 static const double A4HEIGHT;
335 static const double A4WIDTH;
336 static const double A4BORDER;
347 ///\image html nodeshape_0.png
348 ///\image latex nodeshape_0.eps "CIRCLE shape (0)" width=2cm
351 ///\image html nodeshape_1.png
352 ///\image latex nodeshape_1.eps "SQUARE shape (1)" width=2cm
356 ///\image html nodeshape_2.png
357 ///\image latex nodeshape_2.eps "DIAMOND shape (2)" width=2cm
366 edgeLess(const Graph &_g) : g(_g) {}
367 bool operator()(Edge a,Edge b) const
369 Node ai=std::min(g.source(a),g.target(a));
370 Node aa=std::max(g.source(a),g.target(a));
371 Node bi=std::min(g.source(b),g.target(b));
372 Node ba=std::max(g.source(b),g.target(b));
374 (ai==bi && (aa < ba ||
375 (aa==ba && ai==g.source(a) && bi==g.target(b))));
378 bool isParallel(Edge e,Edge f) const
380 return (g.source(e)==g.source(f)&&
381 g.target(e)==g.target(f)) ||
382 (g.source(e)==g.target(f)&&
383 g.target(e)==g.source(f));
386 static std::string psOut(const xy<TT> &p)
388 std::ostringstream os;
389 os << p.x << ' ' << p.y;
392 static std::string psOut(const Color &c)
394 std::ostringstream os;
395 os << c.getR() << ' ' << c.getG() << ' ' << c.getB();
400 GraphToEps(const T &t) : T(t), dontPrint(false) {};
402 template<class X> struct CoordsTraits : public T {
404 CoordsTraits(const T &t,const X &x) : T(t), _coords(x) {}
406 ///Sets the map of the node coordinates
408 ///Sets the map of the node coordinates.
409 ///\param x must be a node map with xy<double> or \ref xy "xy<int>" values.
410 template<class X> GraphToEps<CoordsTraits<X> > coords(const X &x) {
412 return GraphToEps<CoordsTraits<X> >(CoordsTraits<X>(*this,x));
414 template<class X> struct NodeSizesTraits : public T {
416 NodeSizesTraits(const T &t,const X &x) : T(t), _nodeSizes(x) {}
418 ///Sets the map of the node sizes
420 ///Sets the map of the node sizes
421 ///\param x must be a node map with \c double (or convertible) values.
422 template<class X> GraphToEps<NodeSizesTraits<X> > nodeSizes(const X &x)
425 return GraphToEps<NodeSizesTraits<X> >(NodeSizesTraits<X>(*this,x));
427 template<class X> struct NodeShapesTraits : public T {
428 const X &_nodeShapes;
429 NodeShapesTraits(const T &t,const X &x) : T(t), _nodeShapes(x) {}
431 ///Sets the map of the node shapes
433 ///Sets the map of the node shapes.
434 ///The availabe shape values
435 ///can be found in \ref NodeShapes "enum NodeShapes".
436 ///\param x must be a node map with \c int (or convertible) values.
438 template<class X> GraphToEps<NodeShapesTraits<X> > nodeShapes(const X &x)
441 return GraphToEps<NodeShapesTraits<X> >(NodeShapesTraits<X>(*this,x));
443 template<class X> struct NodeTextsTraits : public T {
445 NodeTextsTraits(const T &t,const X &x) : T(t), _nodeTexts(x) {}
447 ///Sets the text printed on the nodes
449 ///Sets the text printed on the nodes
450 ///\param x must be a node map with type that can be pushed to a standard
452 template<class X> GraphToEps<NodeTextsTraits<X> > nodeTexts(const X &x)
456 return GraphToEps<NodeTextsTraits<X> >(NodeTextsTraits<X>(*this,x));
458 template<class X> struct NodePsTextsTraits : public T {
459 const X &_nodePsTexts;
460 NodePsTextsTraits(const T &t,const X &x) : T(t), _nodePsTexts(x) {}
462 ///Inserts a PostScript block to the nodes
464 ///With this command it is possible to insert a verbatim PostScript
465 ///block to the nodes.
466 ///The PS current point will be moved to the centre of the node before
467 ///the PostScript block inserted.
469 ///Before and after the block a newline character is inserted so you
470 ///don't have to bother with the separators.
472 ///\param x must be a node map with type that can be pushed to a standard
475 ///\sa nodePsTextsPreamble()
476 ///\todo Offer the choise not to move to the centre but pass the coordinates
477 ///to the Postscript block inserted.
478 template<class X> GraphToEps<NodePsTextsTraits<X> > nodePsTexts(const X &x)
481 _showNodePsText=true;
482 return GraphToEps<NodePsTextsTraits<X> >(NodePsTextsTraits<X>(*this,x));
484 template<class X> struct EdgeWidthsTraits : public T {
485 const X &_edgeWidths;
486 EdgeWidthsTraits(const T &t,const X &x) : T(t), _edgeWidths(x) {}
488 ///Sets the map of the edge widths
490 ///Sets the map of the edge widths
491 ///\param x must be a edge map with \c double (or convertible) values.
492 template<class X> GraphToEps<EdgeWidthsTraits<X> > edgeWidths(const X &x)
495 return GraphToEps<EdgeWidthsTraits<X> >(EdgeWidthsTraits<X>(*this,x));
498 template<class X> struct NodeColorsTraits : public T {
499 const X &_nodeColors;
500 NodeColorsTraits(const T &t,const X &x) : T(t), _nodeColors(x) {}
502 ///Sets the map of the node colors
504 ///Sets the map of the node colors
505 ///\param x must be a node map with \ref Color values.
508 template<class X> GraphToEps<NodeColorsTraits<X> >
509 nodeColors(const X &x)
512 return GraphToEps<NodeColorsTraits<X> >(NodeColorsTraits<X>(*this,x));
514 template<class X> struct NodeTextColorsTraits : public T {
515 const X &_nodeTextColors;
516 NodeTextColorsTraits(const T &t,const X &x) : T(t), _nodeTextColors(x) {}
518 ///Sets the map of the node text colors
520 ///Sets the map of the node text colors
521 ///\param x must be a node map with \ref Color values.
524 template<class X> GraphToEps<NodeTextColorsTraits<X> >
525 nodeTextColors(const X &x)
528 _nodeTextColorType=CUST_COL;
529 return GraphToEps<NodeTextColorsTraits<X> >
530 (NodeTextColorsTraits<X>(*this,x));
532 template<class X> struct EdgeColorsTraits : public T {
533 const X &_edgeColors;
534 EdgeColorsTraits(const T &t,const X &x) : T(t), _edgeColors(x) {}
536 ///Sets the map of the edge colors
538 ///Sets the map of the edge colors
539 ///\param x must be a edge map with \ref Color values.
542 template<class X> GraphToEps<EdgeColorsTraits<X> >
543 edgeColors(const X &x)
546 return GraphToEps<EdgeColorsTraits<X> >(EdgeColorsTraits<X>(*this,x));
548 ///Sets a global scale factor for node sizes
550 ///Sets a global scale factor for node sizes
552 GraphToEps<T> &nodeScale(double d) {_nodeScale=d;return *this;}
553 ///Sets a global scale factor for edge widths
555 ///Sets a global scale factor for edge widths
557 GraphToEps<T> &edgeWidthScale(double d) {_edgeWidthScale=d;return *this;}
558 ///Sets a global scale factor for the whole picture
560 ///Sets a global scale factor for the whole picture
562 GraphToEps<T> &scale(double d) {_scale=d;return *this;}
563 ///Sets the width of the border around the picture
565 ///Sets the width of the border around the picture
567 GraphToEps<T> &border(double b) {_xBorder=_yBorder=b;return *this;}
568 ///Sets the width of the border around the picture
570 ///Sets the width of the border around the picture
572 GraphToEps<T> &border(double x, double y) {
573 _xBorder=x;_yBorder=y;return *this;
575 ///Sets whether to draw arrows
577 ///Sets whether to draw arrows
579 GraphToEps<T> &drawArrows(bool b=true) {_drawArrows=b;return *this;}
580 ///Sets the length of the arrowheads
582 ///Sets the length of the arrowheads
584 GraphToEps<T> &arrowLength(double d) {_arrowLength*=d;return *this;}
585 ///Sets the width of the arrowheads
587 ///Sets the width of the arrowheads
589 GraphToEps<T> &arrowWidth(double d) {_arrowWidth*=d;return *this;}
591 ///Scales the drawing to fit to A4 page
593 ///Scales the drawing to fit to A4 page
595 GraphToEps<T> &scaleToA4() {_scaleToA4=true;return *this;}
597 ///Enables parallel edges
599 ///Enables parallel edges
600 ///\todo Partially implemented
601 GraphToEps<T> &enableParallel(bool b=true) {_enableParallel=b;return *this;}
607 GraphToEps<T> &parEdgeDist(double d) {_parEdgeDist*=d;return *this;}
613 GraphToEps<T> &hideEdges(bool b=true) {_showEdges=!b;return *this;}
618 GraphToEps<T> &hideNodes(bool b=true) {_showNodes=!b;return *this;}
620 ///Sets the size of the node texts
622 ///Sets the size of the node texts
624 GraphToEps<T> &nodeTextSize(double d) {_nodeTextSize=d;return *this;}
626 ///Sets the color of the node texts to be different from the node color
628 ///Sets the color of the node texts to be as different from the node color
631 GraphToEps<T> &distantColorNodeTexts()
632 {_nodeTextColorType=DIST_COL;return *this;}
633 ///Sets the color of the node texts to be black or white and always visible.
635 ///Sets the color of the node texts to be black or white according to
637 ///different from the node color
639 GraphToEps<T> &distantBWNodeTexts()
640 {_nodeTextColorType=DIST_BW;return *this;}
642 ///Gives a preamble block for node Postscript block.
644 ///Gives a preamble block for node Postscript block.
647 GraphToEps<T> & nodePsTextsPreamble(const char *str) {
648 _nodePsTextsPreamble=str ;return *this;
650 ///Sets whether the the graph is undirected
652 ///Sets whether the the graph is undirected
654 GraphToEps<T> &undir(bool b=true) {_undir=b;return *this;}
655 ///Sets whether the the graph is directed
657 ///Sets whether the the graph is directed.
658 ///Use it to show the undirected edges as a pair of directed ones.
659 GraphToEps<T> &bidir(bool b=true) {_undir=!b;return *this;}
663 ///Sets the title of the generated image,
664 ///namely it inserts a <tt>%%Title:</tt> DSC field to the header of
666 GraphToEps<T> &title(const std::string &t) {_title=t;return *this;}
667 ///Sets the copyright statement.
669 ///Sets the copyright statement of the generated image,
670 ///namely it inserts a <tt>%%Copyright:</tt> DSC field to the header of
672 ///\todo Multiline copyright notice could be supported.
673 GraphToEps<T> ©right(const std::string &t) {_copyright=t;return *this;}
676 bool isInsideNode(xy<double> p, double r,int t)
680 return p.normSquare()<=r*r;
682 return p.x<=r&&p.x>=-r&&p.y<=r&&p.y>=-r;
684 return p.x+p.y<=r && p.x-p.y<=r && -p.x+p.y<=r && -p.x-p.y<=r;
694 ///Like other functions using
695 ///\ref named-templ-func-param "named template parameters",
696 ///this function calles the algorithm itself, i.e. in this case
697 ///it draws the graph.
699 if(dontPrint) return;
701 os << "%!PS-Adobe-2.0 EPSF-2.0\n";
702 if(_title.size()>0) os << "%%Title: " << _title << '\n';
703 if(_copyright.size()>0) os << "%%Copyright: " << _copyright << '\n';
704 // << "%%Copyright: XXXX\n"
705 os << "%%Creator: LEMON GraphToEps function\n";
710 gettimeofday(&tv, 0);
711 ctime_r(&tv.tv_sec,cbuf);
712 os << "%%CreationDate: " << cbuf;
714 BoundingBox<double> bb;
715 ///\bug: Chech whether the graph is empty.
716 for(NodeIt n(g);n!=INVALID;++n) {
717 double ns=_nodeSizes[n]*_nodeScale;
723 bb = BoundingBox<double>(xy<double>(0,0));
726 os <<"%%BoundingBox: 0 0 596 842\n%%DocumentPaperSizes: a4\n";
727 else os << "%%BoundingBox: "
728 << bb.left()* _scale-_xBorder << ' '
729 << bb.bottom()*_scale-_yBorder << ' '
730 << bb.right()* _scale+_xBorder << ' '
731 << bb.top()* _scale+_yBorder << '\n';
733 os << "%%EndComments\n";
735 //x1 y1 x2 y2 x3 y3 cr cg cb w
736 os << "/lb { setlinewidth setrgbcolor newpath moveto\n"
737 << " 4 2 roll 1 index 1 index curveto stroke } bind def\n";
738 os << "/l { setlinewidth setrgbcolor newpath moveto lineto stroke } bind def\n";
740 os << "/c { newpath dup 3 index add 2 index moveto 0 360 arc closepath } bind def\n";
742 os << "/sq { newpath 2 index 1 index add 2 index 2 index add moveto\n"
743 << " 2 index 1 index sub 2 index 2 index add lineto\n"
744 << " 2 index 1 index sub 2 index 2 index sub lineto\n"
745 << " 2 index 1 index add 2 index 2 index sub lineto\n"
746 << " closepath pop pop pop} bind def\n";
748 os << "/di { newpath 2 index 1 index add 2 index moveto\n"
749 << " 2 index 2 index 2 index add lineto\n"
750 << " 2 index 1 index sub 2 index lineto\n"
751 << " 2 index 2 index 2 index sub lineto\n"
752 << " closepath pop pop pop} bind def\n";
754 os << "/nc { 0 0 0 setrgbcolor 5 index 5 index 5 index c fill\n"
755 << " setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
757 os << "/nsq { 0 0 0 setrgbcolor 5 index 5 index 5 index sq fill\n"
758 << " setrgbcolor " << 1+_nodeBorderQuotient << " div sq fill\n"
760 os << "/ndi { 0 0 0 setrgbcolor 5 index 5 index 5 index di fill\n"
761 << " setrgbcolor " << 1+_nodeBorderQuotient << " div di fill\n"
763 os << "/arrl " << _arrowLength << " def\n";
764 os << "/arrw " << _arrowWidth << " def\n";
766 os << "/lrl { 2 index mul exch 2 index mul exch rlineto pop} bind def\n";
767 //len w dx_norm dy_norm x1 y1 cr cg cb
768 os << "/arr { setrgbcolor /y1 exch def /x1 exch def /dy exch def /dx exch def\n"
769 << " /w exch def /len exch def\n"
770 // << " 0.1 setlinewidth x1 y1 moveto dx len mul dy len mul rlineto stroke"
771 << " newpath x1 dy w 2 div mul add y1 dx w 2 div mul sub moveto\n"
772 << " len w sub arrl sub dx dy lrl\n"
773 << " arrw dy dx neg lrl\n"
774 << " dx arrl w add mul dy w 2 div arrw add mul sub\n"
775 << " dy arrl w add mul dx w 2 div arrw add mul add rlineto\n"
776 << " dx arrl w add mul neg dy w 2 div arrw add mul sub\n"
777 << " dy arrl w add mul neg dx w 2 div arrw add mul add rlineto\n"
778 << " arrw dy dx neg lrl\n"
779 << " len w sub arrl sub neg dx dy lrl\n"
780 << " closepath fill } bind def\n";
781 os << "/cshow { 2 index 2 index moveto dup stringwidth pop\n"
782 << " neg 2 div fosi .35 mul neg rmoveto show pop pop} def\n";
786 if(bb.height()>bb.width()) {
787 double sc= std::min((A4HEIGHT-2*A4BORDER)/bb.height(),
788 (A4WIDTH-2*A4BORDER)/bb.width());
789 os << ((A4WIDTH -2*A4BORDER)-sc*bb.width())/2 + A4BORDER << ' '
790 << ((A4HEIGHT-2*A4BORDER)-sc*bb.height())/2 + A4BORDER << " translate\n"
791 << sc << " dup scale\n"
792 << -bb.left() << ' ' << -bb.bottom() << " translate\n";
795 //\todo Verify centering
796 double sc= std::min((A4HEIGHT-2*A4BORDER)/bb.width(),
797 (A4WIDTH-2*A4BORDER)/bb.height());
798 os << ((A4WIDTH -2*A4BORDER)-sc*bb.height())/2 + A4BORDER << ' '
799 << ((A4HEIGHT-2*A4BORDER)-sc*bb.width())/2 + A4BORDER << " translate\n"
800 << sc << " dup scale\n90 rotate\n"
801 << -bb.left() << ' ' << -bb.top() << " translate\n";
803 else if(_scale!=1.0) os << _scale << " dup scale\n";
806 os << "%Edges:\ngsave\n";
807 if(_enableParallel) {
808 std::vector<Edge> el;
809 for(EdgeIt e(g);e!=INVALID;++e)
810 if((!_undir||g.source(e)<g.target(e))&&_edgeWidths[e]>0)
812 sort(el.begin(),el.end(),edgeLess(g));
814 typename std::vector<Edge>::iterator j;
815 for(typename std::vector<Edge>::iterator i=el.begin();i!=el.end();i=j) {
816 for(j=i+1;j!=el.end()&&isParallel(*i,*j);++j) ;
819 for(typename std::vector<Edge>::iterator e=i;e!=j;++e)
820 sw+=_edgeWidths[*e]*_edgeWidthScale+_parEdgeDist;
823 xy<double> dvec(_coords[g.target(*i)]-_coords[g.source(*i)]);
824 double l=std::sqrt(dvec.normSquare());
825 ///\todo better 'epsilon' would be nice here.
826 xy<double> d(dvec/std::max(l,1e-9));
828 // m=xy<double>(_coords[g.target(*i)]+_coords[g.source(*i)])/2.0;
830 // m=xy<double>(_coords[g.source(*i)])+
831 // dvec*(double(_nodeSizes[g.source(*i)])/
832 // (_nodeSizes[g.source(*i)]+_nodeSizes[g.target(*i)]));
834 m=xy<double>(_coords[g.source(*i)])+
835 d*(l+_nodeSizes[g.source(*i)]-_nodeSizes[g.target(*i)])/2.0;
837 for(typename std::vector<Edge>::iterator e=i;e!=j;++e) {
838 sw+=_edgeWidths[*e]*_edgeWidthScale/2.0;
839 xy<double> mm=m+rot90(d)*sw/.75;
842 xy<double> s=_coords[g.source(*e)];
843 xy<double> t=_coords[g.target(*e)];
844 double rn=_nodeSizes[g.target(*e)]*_nodeScale;
845 node_shape=_nodeShapes[g.target(*e)];
846 Bezier3 bez(s,mm,mm,t);
848 for(int i=0;i<INTERPOL_PREC;++i)
849 if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape)) t2=(t1+t2)/2;
851 xy<double> apoint=bez((t1+t2)/2);
852 rn = _arrowLength+_edgeWidths[*e]*_edgeWidthScale;
855 for(int i=0;i<INTERPOL_PREC;++i)
856 if((bez((t1+t2)/2)-apoint).normSquare()>rn) t1=(t1+t2)/2;
858 xy<double> linend=bez((t1+t2)/2);
859 bez=bez.before((t1+t2)/2);
860 // rn=_nodeSizes[g.source(*e)]*_nodeScale;
861 // node_shape=_nodeShapes[g.source(*e)];
863 // for(int i=0;i<INTERPOL_PREC;++i)
864 // if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape)) t1=(t1+t2)/2;
865 // else t2=(t1+t2)/2;
866 // bez=bez.after((t1+t2)/2);
867 os << _edgeWidths[*e]*_edgeWidthScale << " setlinewidth "
868 << _edgeColors[*e].getR() << ' '
869 << _edgeColors[*e].getG() << ' '
870 << _edgeColors[*e].getB() << " setrgbcolor newpath\n"
871 << bez.p1.x << ' ' << bez.p1.y << " moveto\n"
872 << bez.p2.x << ' ' << bez.p2.y << ' '
873 << bez.p3.x << ' ' << bez.p3.y << ' '
874 << bez.p4.x << ' ' << bez.p4.y << " curveto stroke\n";
875 xy<double> dd(rot90(linend-apoint));
876 dd*=(.5*_edgeWidths[*e]*_edgeWidthScale+_arrowWidth)/
877 std::sqrt(dd.normSquare());
878 os << "newpath " << psOut(apoint) << " moveto "
879 << psOut(linend+dd) << " lineto "
880 << psOut(linend-dd) << " lineto closepath fill\n";
883 os << _coords[g.source(*e)].x << ' '
884 << _coords[g.source(*e)].y << ' '
885 << mm.x << ' ' << mm.y << ' '
886 << _coords[g.target(*e)].x << ' '
887 << _coords[g.target(*e)].y << ' '
888 << _edgeColors[*e].getR() << ' '
889 << _edgeColors[*e].getG() << ' '
890 << _edgeColors[*e].getB() << ' '
891 << _edgeWidths[*e]*_edgeWidthScale << " lb\n";
893 sw+=_edgeWidths[*e]*_edgeWidthScale/2.0+_parEdgeDist;
897 else for(EdgeIt e(g);e!=INVALID;++e)
898 if((!_undir||g.source(e)<g.target(e))&&_edgeWidths[e]>0)
900 xy<double> d(_coords[g.target(e)]-_coords[g.source(e)]);
901 double rn=_nodeSizes[g.target(e)]*_nodeScale;
902 int node_shape=_nodeShapes[g.target(e)];
904 for(int i=0;i<INTERPOL_PREC;++i)
905 if(isInsideNode((-(t1+t2)/2)*d,rn,node_shape)) t1=(t1+t2)/2;
907 double l=sqrt(d.normSquare());
910 os << l*(1-(t1+t2)/2) << ' '
911 << _edgeWidths[e]*_edgeWidthScale << ' '
912 << d.x << ' ' << d.y << ' '
913 << _coords[g.source(e)].x << ' '
914 << _coords[g.source(e)].y << ' '
915 << _edgeColors[e].getR() << ' '
916 << _edgeColors[e].getG() << ' '
917 << _edgeColors[e].getB() << " arr\n";
919 else os << _coords[g.source(e)].x << ' '
920 << _coords[g.source(e)].y << ' '
921 << _coords[g.target(e)].x << ' '
922 << _coords[g.target(e)].y << ' '
923 << _edgeColors[e].getR() << ' '
924 << _edgeColors[e].getG() << ' '
925 << _edgeColors[e].getB() << ' '
926 << _edgeWidths[e]*_edgeWidthScale << " l\n";
930 os << "%Nodes:\ngsave\n";
931 for(NodeIt n(g);n!=INVALID;++n) {
932 os << _coords[n].x << ' ' << _coords[n].y << ' '
933 << _nodeSizes[n]*_nodeScale << ' '
934 << _nodeColors[n].getR() << ' '
935 << _nodeColors[n].getG() << ' '
936 << _nodeColors[n].getB() << ' ';
937 switch(_nodeShapes[n]) {
950 os << "%Node texts:\ngsave\n";
951 os << "/fosi " << _nodeTextSize << " def\n";
952 os << "(Helvetica) findfont fosi scalefont setfont\n";
953 for(NodeIt n(g);n!=INVALID;++n) {
954 switch(_nodeTextColorType) {
956 os << psOut(distantColor(_nodeColors[n])) << " setrgbcolor\n";
959 os << psOut(distantBW(_nodeColors[n])) << " setrgbcolor\n";
962 os << psOut(distantColor(_nodeTextColors[n])) << " setrgbcolor\n";
965 os << "0 0 0 setrgbcolor\n";
967 os << _coords[n].x << ' ' << _coords[n].y
968 << " (" << _nodeTexts[n] << ") cshow\n";
972 if(_showNodePsText) {
973 os << "%Node PS blocks:\ngsave\n";
974 for(NodeIt n(g);n!=INVALID;++n)
975 os << _coords[n].x << ' ' << _coords[n].y
976 << " moveto\n" << _nodePsTexts[n] << "\n";
980 os << "grestore\nshowpage\n";
983 if(_pleaseRemoveOsStream) {delete &os;}
988 const int GraphToEps<T>::INTERPOL_PREC = 20;
990 const double GraphToEps<T>::A4HEIGHT = 841.8897637795276;
992 const double GraphToEps<T>::A4WIDTH = 595.275590551181;
994 const double GraphToEps<T>::A4BORDER = 15;
997 ///Generates an EPS file from a graph
1000 ///Generates an EPS file from a graph.
1001 ///\param g is a reference to the graph to be printed
1002 ///\param os is a reference to the output stream.
1003 ///By default it is <tt>std::cout</tt>
1005 ///This function also has a lot of
1006 ///\ref named-templ-func-param "named parameters",
1007 ///they are declared as the members of class \ref GraphToEps. The following
1008 ///example shows how to use these parameters.
1010 /// graphToEps(g,os).scale(10).coords(coords)
1011 /// .nodeScale(2).nodeSizes(sizes)
1012 /// .edgeWidthScale(.4).run();
1014 ///\warning Don't forget to put the \ref GraphToEps::run() "run()"
1015 ///to the end of the parameter list.
1017 ///\sa graphToEps(G &g, const char *file_name)
1019 GraphToEps<DefaultGraphToEpsTraits<G> >
1020 graphToEps(G &g, std::ostream& os=std::cout)
1023 GraphToEps<DefaultGraphToEpsTraits<G> >(DefaultGraphToEpsTraits<G>(g,os));
1026 ///Generates an EPS file from a graph
1028 ///\ingroup io_group
1029 ///This function does the same as
1030 ///\ref graphToEps(G &g,std::ostream& os)
1031 ///but it writes its output into the file \c file_name
1032 ///instead of a stream.
1033 ///\sa graphToEps(G &g, std::ostream& os)
1035 GraphToEps<DefaultGraphToEpsTraits<G> >
1036 graphToEps(G &g,const char *file_name)
1038 return GraphToEps<DefaultGraphToEpsTraits<G> >
1039 (DefaultGraphToEpsTraits<G>(g,*new std::ofstream(file_name),true));
1042 } //END OF NAMESPACE LEMON
1044 #endif // LEMON_GRAPH_TO_EPS_H