- '.lgf' could be the standard 'lemon graph format' extension.
- heap_test is fixed in order that 'make discheck' work.
- heap_test now checks whether the input file exists.
2 * src/lemon/graph_to_eps.h - Part of LEMON, a generic C++ optimization library
4 * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
5 * (Egervary Combinatorial Optimization Research Group, 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
30 #include<lemon/maps.h>
31 #include<lemon/bezier.h>
35 ///\brief Simple graph drawer
37 ///\author Alpar Juttner
41 ///Data structure representing RGB colors.
43 ///Data structure representing RGB colors.
49 ///Default constructor
52 Color(double r,double g,double b) :_r(r),_g(g),_b(b) {};
53 ///Returns the red component
55 ///\todo \c red() could be a better name...
56 double getR() const {return _r;}
57 ///Returns the green component
58 double getG() const {return _g;}
59 ///Returns the blue component
60 double getB() const {return _b;}
61 ///Set the color components
62 void set(double r,double g,double b) { _r=r;_g=g;_b=b; };
65 ///Maps <tt>int</tt>s to different \ref Color "Color"s
67 ///This map assing one of the predefined \ref Color "Color"s
68 ///to each <tt>int</tt>. It is possible to change the colors as well as their
69 ///number. The integer range is cyclically mapped to the provided set of colors.
71 ///This is a true \ref concept::ReferenceMap "reference map", so you can also
72 ///change the actual colors.
74 class ColorSet : public MapBase<int,Color>
76 std::vector<Color> colors;
81 ///\param have_white indicates wheter white is
82 ///amongst the provided color (\c true) or not (\c false). If it is true,
83 ///white will be assigned to \c 0.
84 ///\param num the number of the allocated colors. If it is \c 0
85 ///the default color configuration is set up (26 color plus the while).
86 ///If \c num is less then 26/27 then the default color list is cut. Otherwise
87 ///the color list is filled repeatedly with the default color list.
88 ColorSet(bool have_white=false,int num=0)
91 if(have_white) colors.push_back(Color(1,1,1));
93 colors.push_back(Color(0,0,0));
94 colors.push_back(Color(1,0,0));
95 colors.push_back(Color(0,1,0));
96 colors.push_back(Color(0,0,1));
97 colors.push_back(Color(1,1,0));
98 colors.push_back(Color(1,0,1));
99 colors.push_back(Color(0,1,1));
101 colors.push_back(Color(.5,0,0));
102 colors.push_back(Color(0,.5,0));
103 colors.push_back(Color(0,0,.5));
104 colors.push_back(Color(.5,.5,0));
105 colors.push_back(Color(.5,0,.5));
106 colors.push_back(Color(0,.5,.5));
108 colors.push_back(Color(.5,.5,.5));
109 colors.push_back(Color(1,.5,.5));
110 colors.push_back(Color(.5,1,.5));
111 colors.push_back(Color(.5,.5,1));
112 colors.push_back(Color(1,1,.5));
113 colors.push_back(Color(1,.5,1));
114 colors.push_back(Color(.5,1,1));
116 colors.push_back(Color(1,.5,0));
117 colors.push_back(Color(.5,1,0));
118 colors.push_back(Color(1,0,.5));
119 colors.push_back(Color(0,1,.5));
120 colors.push_back(Color(0,.5,1));
121 colors.push_back(Color(.5,0,1));
122 } while(int(colors.size())<num);
123 // colors.push_back(Color(1,1,1));
124 if(num>0) colors.resize(num);
127 Color &operator[](int i)
129 return colors[i%colors.size()];
132 const Color &operator[](int i) const
134 return colors[i%colors.size()];
137 void set(int i,const Color &c)
139 colors[i%colors.size()]=c;
141 ///Sets the number of the exiting colors.
142 void resize(int s) { colors.resize(s);}
143 ///Returns the munber of the existing colors.
144 std::size_t size() { return colors.size();}
147 ///Returns a visible distinct \ref Color
149 ///Returns a \ref Color which is as different from the given parameter
150 ///as it is possible.
151 inline Color distantColor(const Color &c)
153 return Color(c.getR()<.5?1:0,c.getG()<.5?1:0,c.getB()<.5?1:0);
155 ///Returns black for light colors and white for the dark ones.
157 ///Returns black for light colors and white for the dark ones.
158 ///\todo weighted average would be better
159 inline Color distantBW(const Color &c){
160 double v=(.2125*c.getR()+.7154*c.getG()+.0721*c.getB())<.5?1:0;
164 ///Default traits class of \ref GraphToEps
166 ///Default traits class of \ref GraphToEps
168 ///\c G is the type of the underlying graph.
170 struct DefaultGraphToEpsTraits
173 typedef typename Graph::Node Node;
174 typedef typename Graph::NodeIt NodeIt;
175 typedef typename Graph::Edge Edge;
176 typedef typename Graph::EdgeIt EdgeIt;
177 typedef typename Graph::InEdgeIt InEdgeIt;
178 typedef typename Graph::OutEdgeIt OutEdgeIt;
185 ConstMap<typename Graph::Node,xy<double> > _coords;
186 ConstMap<typename Graph::Node,double > _nodeSizes;
187 ConstMap<typename Graph::Node,int > _nodeShapes;
189 ConstMap<typename Graph::Node,Color > _nodeColors;
190 ConstMap<typename Graph::Edge,Color > _edgeColors;
192 ConstMap<typename Graph::Edge,double > _edgeWidths;
194 static const double A4HEIGHT = 841.8897637795276;
195 static const double A4WIDTH = 595.275590551181;
196 static const double A4BORDER = 15;
199 double _edgeWidthScale;
202 double _xBorder, _yBorder;
204 double _nodeBorderQuotient;
207 double _arrowLength, _arrowWidth;
209 bool _showNodes, _showEdges;
211 bool _enableParallel;
215 ConstMap<typename Graph::Node,bool > _nodeTexts;
216 double _nodeTextSize;
218 bool _showNodePsText;
219 ConstMap<typename Graph::Node,bool > _nodePsTexts;
220 char *_nodePsTextsPreamble;
223 bool _pleaseRemoveOsStream;
228 std::string _copyright;
230 enum NodeTextColorType
231 { DIST_COL=0, DIST_BW=1, CUST_COL=2, SAME_COL=3 } _nodeTextColorType;
232 ConstMap<typename Graph::Node,Color > _nodeTextColors;
237 ///\param _g is a reference to the graph to be printed
238 ///\param _os is a reference to the output stream.
239 ///\param _os is a reference to the output stream.
240 ///\param _pros If it is \c true, then the \c ostream referenced by \c _os
241 ///will be explicitly deallocated by the destructor.
242 ///By default it is <tt>std::cout</tt>
243 DefaultGraphToEpsTraits(const G &_g,std::ostream& _os=std::cout,
246 _coords(xy<double>(1,1)), _nodeSizes(1.0), _nodeShapes(0),
247 _nodeColors(Color(1,1,1)), _edgeColors(Color(0,0,0)),
248 _edgeWidths(1), _edgeWidthScale(0.3),
249 _nodeScale(1.0), _xBorder(10), _yBorder(10), _scale(1.0),
250 _nodeBorderQuotient(.1),
251 _drawArrows(false), _arrowLength(1), _arrowWidth(0.3),
252 _showNodes(true), _showEdges(true),
253 _enableParallel(false), _parEdgeDist(1),
254 _showNodeText(false), _nodeTexts(false), _nodeTextSize(1),
255 _showNodePsText(false), _nodePsTexts(false), _nodePsTextsPreamble(0),
257 _pleaseRemoveOsStream(_pros), _scaleToA4(false),
258 _nodeTextColorType(SAME_COL), _nodeTextColors(Color(0,0,0))
262 ///Helper class to implement the named parameters of \ref graphToEps()
264 ///Helper class to implement the named parameters of \ref graphToEps()
265 ///\todo Is 'helper class' a good name for this?
267 ///\todo Follow PostScript's DSC.
268 /// Use own dictionary.
269 ///\todo Useful new features.
270 /// - Linestyles: dotted, dashed etc.
271 /// - A second color and percent value for the lines.
272 template<class T> class GraphToEps : public T
274 typedef typename T::Graph Graph;
275 typedef typename Graph::Node Node;
276 typedef typename Graph::NodeIt NodeIt;
277 typedef typename Graph::Edge Edge;
278 typedef typename Graph::EdgeIt EdgeIt;
279 typedef typename Graph::InEdgeIt InEdgeIt;
280 typedef typename Graph::OutEdgeIt OutEdgeIt;
282 static const int INTERPOL_PREC=20;
293 ///\image html nodeshape_0.png
294 ///\image latex nodeshape_0.eps "CIRCLE shape (0)" width=2cm
297 ///\image html nodeshape_1.png
298 ///\image latex nodeshape_1.eps "SQUARE shape (1)" width=2cm
302 ///\image html nodeshape_2.png
303 ///\image latex nodeshape_2.eps "DIAMOND shape (2)" width=2cm
312 edgeLess(const Graph &_g) : g(_g) {}
313 bool operator()(Edge a,Edge b) const
315 Node ai=min(g.source(a),g.target(a));
316 Node aa=max(g.source(a),g.target(a));
317 Node bi=min(g.source(b),g.target(b));
318 Node ba=max(g.source(b),g.target(b));
320 (ai==bi && (aa < ba ||
321 (aa==ba && ai==g.source(a) && bi==g.target(b))));
324 bool isParallel(Edge e,Edge f) const
326 return (g.source(e)==g.source(f)&&g.target(e)==g.target(f))||
327 (g.source(e)==g.target(f)&&g.target(e)==g.source(f));
330 static std::string psOut(const xy<TT> &p)
332 std::ostringstream os;
333 os << p.x << ' ' << p.y;
336 static std::string psOut(const Color &c)
338 std::ostringstream os;
339 os << c.getR() << ' ' << c.getG() << ' ' << c.getB();
344 GraphToEps(const T &t) : T(t), dontPrint(false) {};
346 template<class X> struct CoordsTraits : public T {
348 CoordsTraits(const T &t,const X &x) : T(t), _coords(x) {}
350 ///Sets the map of the node coordinates
352 ///Sets the map of the node coordinates.
353 ///\param x must be a node map with xy<double> or \ref xy "xy<int>" values.
354 template<class X> GraphToEps<CoordsTraits<X> > coords(const X &x) {
356 return GraphToEps<CoordsTraits<X> >(CoordsTraits<X>(*this,x));
358 template<class X> struct NodeSizesTraits : public T {
360 NodeSizesTraits(const T &t,const X &x) : T(t), _nodeSizes(x) {}
362 ///Sets the map of the node sizes
364 ///Sets the map of the node sizes
365 ///\param x must be a node map with \c double (or convertible) values.
366 template<class X> GraphToEps<NodeSizesTraits<X> > nodeSizes(const X &x)
369 return GraphToEps<NodeSizesTraits<X> >(NodeSizesTraits<X>(*this,x));
371 template<class X> struct NodeShapesTraits : public T {
372 const X &_nodeShapes;
373 NodeShapesTraits(const T &t,const X &x) : T(t), _nodeShapes(x) {}
375 ///Sets the map of the node shapes
377 ///Sets the map of the node shapes.
378 ///The availabe shape values
379 ///can be found in \ref NodeShapes "enum NodeShapes".
380 ///\param x must be a node map with \c int (or convertible) values.
382 template<class X> GraphToEps<NodeShapesTraits<X> > nodeShapes(const X &x)
385 return GraphToEps<NodeShapesTraits<X> >(NodeShapesTraits<X>(*this,x));
387 template<class X> struct NodeTextsTraits : public T {
389 NodeTextsTraits(const T &t,const X &x) : T(t), _nodeTexts(x) {}
391 ///Sets the text printed on the nodes
393 ///Sets the text printed on the nodes
394 ///\param x must be a node map with type that can be pushed to a standard
396 template<class X> GraphToEps<NodeTextsTraits<X> > nodeTexts(const X &x)
400 return GraphToEps<NodeTextsTraits<X> >(NodeTextsTraits<X>(*this,x));
402 template<class X> struct NodePsTextsTraits : public T {
403 const X &_nodePsTexts;
404 NodePsTextsTraits(const T &t,const X &x) : T(t), _nodePsTexts(x) {}
406 ///Inserts a PostScript block to the nodes
408 ///With this command it is possible to insert a verbatim PostScript
409 ///block to the nodes.
410 ///The PS current point will be moved to the centre of the node before
411 ///the PostScript block inserted.
413 ///Before and after the block a newline character is inserted to you
414 ///don't have to bother with the separators.
416 ///\param x must be a node map with type that can be pushed to a standard
419 ///\sa nodePsTextsPreamble()
420 ///\todo Offer the choise not to move to the centre but pass the coordinates
421 ///to the Postscript block inserted.
422 template<class X> GraphToEps<NodePsTextsTraits<X> > nodePsTexts(const X &x)
425 _showNodePsText=true;
426 return GraphToEps<NodePsTextsTraits<X> >(NodePsTextsTraits<X>(*this,x));
428 template<class X> struct EdgeWidthsTraits : public T {
429 const X &_edgeWidths;
430 EdgeWidthsTraits(const T &t,const X &x) : T(t), _edgeWidths(x) {}
432 ///Sets the map of the edge widths
434 ///Sets the map of the edge widths
435 ///\param x must be a edge map with \c double (or convertible) values.
436 template<class X> GraphToEps<EdgeWidthsTraits<X> > edgeWidths(const X &x)
439 return GraphToEps<EdgeWidthsTraits<X> >(EdgeWidthsTraits<X>(*this,x));
442 template<class X> struct NodeColorsTraits : public T {
443 const X &_nodeColors;
444 NodeColorsTraits(const T &t,const X &x) : T(t), _nodeColors(x) {}
446 ///Sets the map of the node colors
448 ///Sets the map of the node colors
449 ///\param x must be a node map with \ref Color values.
450 template<class X> GraphToEps<NodeColorsTraits<X> >
451 nodeColors(const X &x)
454 return GraphToEps<NodeColorsTraits<X> >(NodeColorsTraits<X>(*this,x));
456 template<class X> struct NodeTextColorsTraits : public T {
457 const X &_nodeTextColors;
458 NodeTextColorsTraits(const T &t,const X &x) : T(t), _nodeTextColors(x) {}
460 ///Sets the map of the node text colors
462 ///Sets the map of the node text colors
463 ///\param x must be a node map with \ref Color values.
464 template<class X> GraphToEps<NodeTextColorsTraits<X> >
465 nodeTextColors(const X &x)
468 _nodeTextColorType=CUST_COL;
469 return GraphToEps<NodeTextColorsTraits<X> >
470 (NodeTextColorsTraits<X>(*this,x));
472 template<class X> struct EdgeColorsTraits : public T {
473 const X &_edgeColors;
474 EdgeColorsTraits(const T &t,const X &x) : T(t), _edgeColors(x) {}
476 ///Sets the map of the edge colors
478 ///Sets the map of the edge colors
479 ///\param x must be a edge map with \ref Color values.
480 template<class X> GraphToEps<EdgeColorsTraits<X> >
481 edgeColors(const X &x)
484 return GraphToEps<EdgeColorsTraits<X> >(EdgeColorsTraits<X>(*this,x));
486 ///Sets a global scale factor for node sizes
488 ///Sets a global scale factor for node sizes
490 GraphToEps<T> &nodeScale(double d) {_nodeScale=d;return *this;}
491 ///Sets a global scale factor for edge widths
493 ///Sets a global scale factor for edge widths
495 GraphToEps<T> &edgeWidthScale(double d) {_edgeWidthScale=d;return *this;}
496 ///Sets a global scale factor for the whole picture
498 ///Sets a global scale factor for the whole picture
500 GraphToEps<T> &scale(double d) {_scale=d;return *this;}
501 ///Sets the width of the border around the picture
503 ///Sets the width of the border around the picture
505 GraphToEps<T> &border(double b) {_xBorder=_yBorder=b;return *this;}
506 ///Sets the width of the border around the picture
508 ///Sets the width of the border around the picture
510 GraphToEps<T> &border(double x, double y) {
511 _xBorder=x;_yBorder=y;return *this;
513 ///Sets whether to draw arrows
515 ///Sets whether to draw arrows
517 GraphToEps<T> &drawArrows(bool b=true) {_drawArrows=b;return *this;}
518 ///Sets the length of the arrowheads
520 ///Sets the length of the arrowheads
522 GraphToEps<T> &arrowLength(double d) {_arrowLength*=d;return *this;}
523 ///Sets the width of the arrowheads
525 ///Sets the width of the arrowheads
527 GraphToEps<T> &arrowWidth(double d) {_arrowWidth*=d;return *this;}
529 ///Scales the drawing to fit to A4 page
531 ///Scales the drawing to fit to A4 page
533 GraphToEps<T> &scaleToA4() {_scaleToA4=true;return *this;}
535 ///Enables parallel edges
537 ///Enables parallel edges
538 ///\todo Partially implemented
539 GraphToEps<T> &enableParallel(bool b=true) {_enableParallel=b;return *this;}
545 GraphToEps<T> &parEdgeDist(double d) {_parEdgeDist*=d;return *this;}
551 GraphToEps<T> &hideEdges(bool b=true) {_showEdges=!b;return *this;}
556 GraphToEps<T> &hideNodes(bool b=true) {_showNodes=!b;return *this;}
558 ///Sets the size of the node texts
560 ///Sets the size of the node texts
562 GraphToEps<T> &nodeTextSize(double d) {_nodeTextSize=d;return *this;}
564 ///Sets the color of the node texts to be different from the node color
566 ///Sets the color of the node texts to be as different from the node color
569 GraphToEps<T> &distantColorNodeTexts()
570 {_nodeTextColorType=DIST_COL;return *this;}
571 ///Sets the color of the node texts to be black or white and always visible.
573 ///Sets the color of the node texts to be black or white according to
575 ///different from the node color
577 GraphToEps<T> &distantBWNodeTexts()
578 {_nodeTextColorType=DIST_BW;return *this;}
580 ///Gives a preamble block for node Postscript block.
582 ///Gives a preamble block for node Postscript block.
585 GraphToEps<T> & nodePsTextsPreamble(const char *str) {
586 _nodePsTextsPreamble=s ;return *this;
588 ///Sets whether the the graph is undirected
590 ///Sets whether the the graph is undirected
592 GraphToEps<T> &undir(bool b=true) {_undir=b;return *this;}
593 ///Sets whether the the graph is directed
595 ///Sets whether the the graph is directed.
596 ///Use it to show the undirected edges as a pair of directed ones.
597 GraphToEps<T> &bidir(bool b=true) {_undir=!b;return *this;}
601 ///Sets the title of the generated image,
602 ///namely it inserts a <tt>%%Title:</tt> DSC field to the header of
604 GraphToEps<T> &title(const std::string &t) {_title=t;return *this;}
605 ///Sets the copyright statement.
607 ///Sets the copyright statement of the generated image,
608 ///namely it inserts a <tt>%%Copyright:</tt> DSC field to the header of
610 ///\todo Multiline copyright notice could be supported.
611 GraphToEps<T> ©right(const std::string &t) {_copyright=t;return *this;}
614 bool isInsideNode(xy<double> p, double r,int t)
618 return p.normSquare()<=r*r;
620 return p.x<=r&&p.x>=-r&&p.y<=r&&p.y>=-r;
622 return p.x+p.y<=r && p.x-p.y<=r && -p.x+p.y<=r && -p.x-p.y<=r;
632 ///Like other functions using
633 ///\ref named-templ-func-param "named template parameters",
634 ///this function calles the algorithm itself, i.e. in this case
635 ///it draws the graph.
637 if(dontPrint) return;
639 os << "%!PS-Adobe-2.0 EPSF-2.0\n";
640 if(_title.size()>0) os << "%%Title: " << _title << '\n';
641 if(_copyright.size()>0) os << "%%Copyright: " << _copyright << '\n';
642 // << "%%Copyright: XXXX\n"
643 os << "%%Creator: LEMON GraphToEps function\n";
648 gettimeofday(&tv, 0);
649 ctime_r(&tv.tv_sec,cbuf);
650 os << "%%CreationDate: " << cbuf;
652 ///\todo: Chech whether the graph is empty.
653 BoundingBox<double> bb;
654 for(NodeIt n(g);n!=INVALID;++n) {
655 double ns=_nodeSizes[n]*_nodeScale;
661 os <<"%%BoundingBox: 0 0 596 842\n%%DocumentPaperSizes: a4\n";
662 else os << "%%BoundingBox: "
663 << bb.left()* _scale-_xBorder << ' '
664 << bb.bottom()*_scale-_yBorder << ' '
665 << bb.right()* _scale+_xBorder << ' '
666 << bb.top()* _scale+_yBorder << '\n';
668 os << "%%EndComments\n";
670 //x1 y1 x2 y2 x3 y3 cr cg cb w
671 os << "/lb { setlinewidth setrgbcolor newpath moveto\n"
672 << " 4 2 roll 1 index 1 index curveto stroke } bind def\n";
673 os << "/l { setlinewidth setrgbcolor newpath moveto lineto stroke } bind def\n";
675 os << "/c { newpath dup 3 index add 2 index moveto 0 360 arc closepath } bind def\n";
677 os << "/sq { newpath 2 index 1 index add 2 index 2 index add moveto\n"
678 << " 2 index 1 index sub 2 index 2 index add lineto\n"
679 << " 2 index 1 index sub 2 index 2 index sub lineto\n"
680 << " 2 index 1 index add 2 index 2 index sub lineto\n"
681 << " closepath pop pop pop} bind def\n";
683 os << "/di { newpath 2 index 1 index add 2 index moveto\n"
684 << " 2 index 2 index 2 index add lineto\n"
685 << " 2 index 1 index sub 2 index lineto\n"
686 << " 2 index 2 index 2 index sub lineto\n"
687 << " closepath pop pop pop} bind def\n";
689 os << "/nc { 0 0 0 setrgbcolor 5 index 5 index 5 index c fill\n"
690 << " setrgbcolor " << 1+_nodeBorderQuotient << " div c fill\n"
692 os << "/nsq { 0 0 0 setrgbcolor 5 index 5 index 5 index sq fill\n"
693 << " setrgbcolor " << 1+_nodeBorderQuotient << " div sq fill\n"
695 os << "/ndi { 0 0 0 setrgbcolor 5 index 5 index 5 index di fill\n"
696 << " setrgbcolor " << 1+_nodeBorderQuotient << " div di fill\n"
698 os << "/arrl " << _arrowLength << " def\n";
699 os << "/arrw " << _arrowWidth << " def\n";
701 os << "/lrl { 2 index mul exch 2 index mul exch rlineto pop} bind def\n";
702 //len w dx_norm dy_norm x1 y1 cr cg cb
703 os << "/arr { setrgbcolor /y1 exch def /x1 exch def /dy exch def /dx exch def\n"
704 << " /w exch def /len exch def\n"
705 // << " 0.1 setlinewidth x1 y1 moveto dx len mul dy len mul rlineto stroke"
706 << " newpath x1 dy w 2 div mul add y1 dx w 2 div mul sub moveto\n"
707 << " len w sub arrl sub dx dy lrl\n"
708 << " arrw dy dx neg lrl\n"
709 << " dx arrl w add mul dy w 2 div arrw add mul sub\n"
710 << " dy arrl w add mul dx w 2 div arrw add mul add rlineto\n"
711 << " dx arrl w add mul neg dy w 2 div arrw add mul sub\n"
712 << " dy arrl w add mul neg dx w 2 div arrw add mul add rlineto\n"
713 << " arrw dy dx neg lrl\n"
714 << " len w sub arrl sub neg dx dy lrl\n"
715 << " closepath fill } bind def\n";
716 os << "/cshow { 2 index 2 index moveto dup stringwidth pop\n"
717 << " neg 2 div fosi .35 mul neg rmoveto show pop pop} def\n";
721 if(bb.height()>bb.width()) {
722 double sc= min((A4HEIGHT-2*A4BORDER)/bb.height(),
723 (A4WIDTH-2*A4BORDER)/bb.width());
724 os << ((A4WIDTH -2*A4BORDER)-sc*bb.width())/2 + A4BORDER << ' '
725 << ((A4HEIGHT-2*A4BORDER)-sc*bb.height())/2 + A4BORDER << " translate\n"
726 << sc << " dup scale\n"
727 << -bb.left() << ' ' << -bb.bottom() << " translate\n";
730 //\todo Verify centering
731 double sc= min((A4HEIGHT-2*A4BORDER)/bb.width(),
732 (A4WIDTH-2*A4BORDER)/bb.height());
733 os << ((A4WIDTH -2*A4BORDER)-sc*bb.height())/2 + A4BORDER << ' '
734 << ((A4HEIGHT-2*A4BORDER)-sc*bb.width())/2 + A4BORDER << " translate\n"
735 << sc << " dup scale\n90 rotate\n"
736 << -bb.left() << ' ' << -bb.top() << " translate\n";
738 else if(_scale!=1.0) os << _scale << " dup scale\n";
741 os << "%Edges:\ngsave\n";
742 if(_enableParallel) {
743 std::vector<Edge> el;
744 for(EdgeIt e(g);e!=INVALID;++e)
745 if((!_undir||g.source(e)<g.target(e))&&_edgeWidths[e]>0)
747 sort(el.begin(),el.end(),edgeLess(g));
749 typename std::vector<Edge>::iterator j;
750 for(typename std::vector<Edge>::iterator i=el.begin();i!=el.end();i=j) {
751 for(j=i+1;j!=el.end()&&isParallel(*i,*j);++j) ;
754 for(typename std::vector<Edge>::iterator e=i;e!=j;++e)
755 sw+=_edgeWidths[*e]*_edgeWidthScale+_parEdgeDist;
758 xy<double> dvec(_coords[g.target(*i)]-_coords[g.source(*i)]);
759 double l=sqrt(dvec.normSquare());
760 xy<double> d(dvec/l);
762 // m=xy<double>(_coords[g.target(*i)]+_coords[g.source(*i)])/2.0;
764 // m=xy<double>(_coords[g.source(*i)])+
765 // dvec*(double(_nodeSizes[g.source(*i)])/
766 // (_nodeSizes[g.source(*i)]+_nodeSizes[g.target(*i)]));
768 m=xy<double>(_coords[g.source(*i)])+
769 d*(l+_nodeSizes[g.source(*i)]-_nodeSizes[g.target(*i)])/2.0;
771 for(typename std::vector<Edge>::iterator e=i;e!=j;++e) {
772 sw+=_edgeWidths[*e]*_edgeWidthScale/2.0;
773 xy<double> mm=m+rot90(d)*sw/.75;
776 xy<double> s=_coords[g.source(*e)];
777 xy<double> t=_coords[g.target(*e)];
778 double rn=_nodeSizes[g.target(*e)]*_nodeScale;
779 node_shape=_nodeShapes[g.target(*e)];
780 Bezier3 bez(s,mm,mm,t);
782 for(int i=0;i<INTERPOL_PREC;++i)
783 if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape)) t2=(t1+t2)/2;
785 xy<double> apoint=bez((t1+t2)/2);
786 rn = _arrowLength+_edgeWidths[*e]*_edgeWidthScale;
789 for(int i=0;i<INTERPOL_PREC;++i)
790 if((bez((t1+t2)/2)-apoint).normSquare()>rn) t1=(t1+t2)/2;
792 xy<double> linend=bez((t1+t2)/2);
793 bez=bez.before((t1+t2)/2);
794 // rn=_nodeSizes[g.source(*e)]*_nodeScale;
795 // node_shape=_nodeShapes[g.source(*e)];
797 // for(int i=0;i<INTERPOL_PREC;++i)
798 // if(isInsideNode(bez((t1+t2)/2)-t,rn,node_shape)) t1=(t1+t2)/2;
799 // else t2=(t1+t2)/2;
800 // bez=bez.after((t1+t2)/2);
801 os << _edgeWidths[*e]*_edgeWidthScale << " setlinewidth "
802 << _edgeColors[*e].getR() << ' '
803 << _edgeColors[*e].getG() << ' '
804 << _edgeColors[*e].getB() << " setrgbcolor newpath\n"
805 << bez.p1.x << ' ' << bez.p1.y << " moveto\n"
806 << bez.p2.x << ' ' << bez.p2.y << ' '
807 << bez.p3.x << ' ' << bez.p3.y << ' '
808 << bez.p4.x << ' ' << bez.p4.y << " curveto stroke\n";
809 xy<double> dd(rot90(linend-apoint));
810 dd*=(.5*_edgeWidths[*e]*_edgeWidthScale+_arrowWidth)/
811 sqrt(dd.normSquare());
812 os << "newpath " << psOut(apoint) << " moveto "
813 << psOut(linend+dd) << " lineto "
814 << psOut(linend-dd) << " lineto closepath fill\n";
817 os << _coords[g.source(*e)].x << ' '
818 << _coords[g.source(*e)].y << ' '
819 << mm.x << ' ' << mm.y << ' '
820 << _coords[g.target(*e)].x << ' '
821 << _coords[g.target(*e)].y << ' '
822 << _edgeColors[*e].getR() << ' '
823 << _edgeColors[*e].getG() << ' '
824 << _edgeColors[*e].getB() << ' '
825 << _edgeWidths[*e]*_edgeWidthScale << " lb\n";
827 sw+=_edgeWidths[*e]*_edgeWidthScale/2.0+_parEdgeDist;
831 else for(EdgeIt e(g);e!=INVALID;++e)
832 if((!_undir||g.source(e)<g.target(e))&&_edgeWidths[e]>0)
834 xy<double> d(_coords[g.target(e)]-_coords[g.source(e)]);
835 double rn=_nodeSizes[g.target(e)]*_nodeScale;
836 int node_shape=_nodeShapes[g.target(e)];
838 for(int i=0;i<INTERPOL_PREC;++i)
839 if(isInsideNode((-(t1+t2)/2)*d,rn,node_shape)) t1=(t1+t2)/2;
841 double l=sqrt(d.normSquare());
844 os << l*(1-(t1+t2)/2) << ' '
845 << _edgeWidths[e]*_edgeWidthScale << ' '
846 << d.x << ' ' << d.y << ' '
847 << _coords[g.source(e)].x << ' '
848 << _coords[g.source(e)].y << ' '
849 << _edgeColors[e].getR() << ' '
850 << _edgeColors[e].getG() << ' '
851 << _edgeColors[e].getB() << " arr\n";
853 else os << _coords[g.source(e)].x << ' '
854 << _coords[g.source(e)].y << ' '
855 << _coords[g.target(e)].x << ' '
856 << _coords[g.target(e)].y << ' '
857 << _edgeColors[e].getR() << ' '
858 << _edgeColors[e].getG() << ' '
859 << _edgeColors[e].getB() << ' '
860 << _edgeWidths[e]*_edgeWidthScale << " l\n";
864 os << "%Nodes:\ngsave\n";
865 for(NodeIt n(g);n!=INVALID;++n) {
866 os << _coords[n].x << ' ' << _coords[n].y << ' '
867 << _nodeSizes[n]*_nodeScale << ' '
868 << _nodeColors[n].getR() << ' '
869 << _nodeColors[n].getG() << ' '
870 << _nodeColors[n].getB() << ' ';
871 switch(_nodeShapes[n]) {
884 os << "%Node texts:\ngsave\n";
885 os << "/fosi " << _nodeTextSize << " def\n";
886 os << "(Helvetica) findfont fosi scalefont setfont\n";
887 for(NodeIt n(g);n!=INVALID;++n) {
888 switch(_nodeTextColorType) {
890 os << psOut(distantColor(_nodeColors[n])) << " setrgbcolor\n";
893 os << psOut(distantBW(_nodeColors[n])) << " setrgbcolor\n";
896 os << psOut(distantColor(_nodeTextColors[n])) << " setrgbcolor\n";
899 os << "0 0 0 setrgbcolor\n";
901 os << _coords[n].x << ' ' << _coords[n].y
902 << " (" << _nodeTexts[n] << ") cshow\n";
906 if(_showNodePsText) {
907 os << "%Node PS blocks:\ngsave\n";
908 for(NodeIt n(g);n!=INVALID;++n)
909 os << _coords[n].x << ' ' << _coords[n].y
910 << " moveto\n" << _nodePsTexts[n] << "\n";
914 os << "grestore\nshowpage\n";
917 if(_pleaseRemoveOsStream) {delete &os;}
922 ///Generates an EPS file from a graph
925 ///Generates an EPS file from a graph.
926 ///\param g is a reference to the graph to be printed
927 ///\param os is a reference to the output stream.
928 ///By default it is <tt>std::cout</tt>
930 ///This function also has a lot of
931 ///\ref named-templ-func-param "named parameters",
932 ///they are declared as the members of class \ref GraphToEps. The following
933 ///example shows how to use these parameters.
935 /// graphToEps(g,os).scale(10).coords(coords)
936 /// .nodeScale(2).nodeSizes(sizes)
937 /// .edgeWidthScale(.4).run();
939 ///\warning Don't forget to put the \ref GraphToEps::run() "run()"
940 ///to the end of the parameter list.
942 ///\sa graphToEps(G &g, char *file_name)
944 GraphToEps<DefaultGraphToEpsTraits<G> >
945 graphToEps(G &g, std::ostream& os=std::cout)
948 GraphToEps<DefaultGraphToEpsTraits<G> >(DefaultGraphToEpsTraits<G>(g,os));
951 ///Generates an EPS file from a graph
954 ///This function does the same as
955 ///\ref graphToEps(G &g,std::ostream& os)
956 ///but it writes its output into the file \c file_name
957 ///instead of a stream.
958 ///\sa graphToEps(G &g, std::ostream& os)
960 GraphToEps<DefaultGraphToEpsTraits<G> >
961 graphToEps(G &g,const char *file_name)
963 return GraphToEps<DefaultGraphToEpsTraits<G> >
964 (DefaultGraphToEpsTraits<G>(g,*new std::ofstream(file_name),true));
967 } //END OF NAMESPACE LEMON
969 #endif // LEMON_GRAPH_TO_EPS_H