Index: doc/images/grid_graph_demo.eps
===================================================================
--- doc/images/grid_graph_demo.eps	(revision 1776)
+++ doc/images/grid_graph_demo.eps	(revision 1776)
@@ -0,0 +1,476 @@
+%!PS-Adobe-2.0 EPSF-2.0
+%%Title: Grid graph
+%%Copyright: (C) 2005 LEMON Project
+%%Creator: LEMON, graphToEps()
+%%CreationDate: Wed Oct  5 09:42:13 2005
+%%BoundingBox: 0 0 596 842
+%%DocumentPaperSizes: a4
+%%EndComments
+/lb { setlinewidth setrgbcolor newpath moveto
+      4 2 roll 1 index 1 index curveto stroke } bind def
+/l { setlinewidth setrgbcolor newpath moveto lineto stroke } bind def
+/c { newpath dup 3 index add 2 index moveto 0 360 arc closepath } bind def
+/sq { newpath 2 index 1 index add 2 index 2 index add moveto
+      2 index 1 index sub 2 index 2 index add lineto
+      2 index 1 index sub 2 index 2 index sub lineto
+      2 index 1 index add 2 index 2 index sub lineto
+      closepath pop pop pop} bind def
+/di { newpath 2 index 1 index add 2 index moveto
+      2 index             2 index 2 index add lineto
+      2 index 1 index sub 2 index             lineto
+      2 index             2 index 2 index sub lineto
+      closepath pop pop pop} bind def
+/nc { 0 0 0 setrgbcolor 5 index 5 index 5 index c fill
+     setrgbcolor 1.1 div c fill
+   } bind def
+/nsq { 0 0 0 setrgbcolor 5 index 5 index 5 index sq fill
+     setrgbcolor 1.1 div sq fill
+   } bind def
+/ndi { 0 0 0 setrgbcolor 5 index 5 index 5 index di fill
+     setrgbcolor 1.1 div di fill
+   } bind def
+/arrl 1 def
+/arrw 0.3 def
+/lrl { 2 index mul exch 2 index mul exch rlineto pop} bind def
+/arr { setrgbcolor /y1 exch def /x1 exch def /dy exch def /dx exch def
+       /w exch def /len exch def
+       newpath x1 dy w 2 div mul add y1 dx w 2 div mul sub moveto
+       len w sub arrl sub dx dy lrl
+       arrw dy dx neg lrl
+       dx arrl w add mul dy w 2 div arrw add mul sub
+       dy arrl w add mul dx w 2 div arrw add mul add rlineto
+       dx arrl w add mul neg dy w 2 div arrw add mul sub
+       dy arrl w add mul neg dx w 2 div arrw add mul add rlineto
+       arrw dy dx neg lrl
+       len w sub arrl sub neg dx dy lrl
+       closepath fill } bind def
+/cshow { 2 index 2 index moveto dup stringwidth pop
+         neg 2 div fosi .35 mul neg rmoveto show pop pop} def
+
+gsave
+15 58.6908 translate
+7.96163 dup scale
+0.5 0.5 translate
+%Edges:
+gsave
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+0 0 moveto
+0.749815 4.32585 0.850912 4.90911 0.303291 8.22573 curveto stroke
+newpath 0.0853272 9.50734 moveto 0.746921 8.30118 lineto -0.140339 8.15028 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+0 10 moveto
+-0.749815 5.67415 -0.850912 5.09089 -0.303291 1.77427 curveto stroke
+newpath -0.0853272 0.492664 moveto -0.746921 1.69882 lineto 0.140339 1.84972 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+0 0 moveto
+4.32585 -0.749815 4.90911 -0.850912 8.22573 -0.303291 curveto stroke
+newpath 9.50734 -0.0853272 moveto 8.30118 -0.746921 lineto 8.15028 0.140339 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+10 0 moveto
+5.67415 0.749815 5.09089 0.850912 1.77427 0.303291 curveto stroke
+newpath 0.492664 0.0853272 moveto 1.69882 0.746921 lineto 1.84972 -0.140339 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+0 30 moveto
+0.749815 34.3259 0.850912 34.9091 0.303291 38.2257 curveto stroke
+newpath 0.0853272 39.5073 moveto 0.746921 38.3012 lineto -0.140339 38.1503 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+0 40 moveto
+-0.749815 35.6741 -0.850912 35.0909 -0.303291 31.7743 curveto stroke
+newpath -0.0853272 30.4927 moveto -0.746921 31.6988 lineto 0.140339 31.8497 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+0 30 moveto
+4.32585 29.2502 4.90911 29.1491 8.22573 29.6967 curveto stroke
+newpath 9.50734 29.9147 moveto 8.30118 29.2531 lineto 8.15028 30.1403 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+10 30 moveto
+5.67415 30.7498 5.09089 30.8509 1.77427 30.3033 curveto stroke
+newpath 0.492664 30.0853 moveto 1.69882 30.7469 lineto 1.84972 29.8597 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+0 40 moveto
+0.749815 44.3259 0.850912 44.9091 0.303291 48.2257 curveto stroke
+newpath 0.0853272 49.5073 moveto 0.746921 48.3012 lineto -0.140339 48.1503 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+0 50 moveto
+-0.749815 45.6741 -0.850912 45.0909 -0.303291 41.7743 curveto stroke
+newpath -0.0853272 40.4927 moveto -0.746921 41.6988 lineto 0.140339 41.8497 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+0 50 moveto
+0.749815 54.3259 0.850912 54.9091 0.303291 58.2257 curveto stroke
+newpath 0.0853272 59.5073 moveto 0.746921 58.3012 lineto -0.140339 58.1503 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+0 60 moveto
+-0.749815 55.6741 -0.850912 55.0909 -0.303291 51.7743 curveto stroke
+newpath -0.0853272 50.4927 moveto -0.746921 51.6988 lineto 0.140339 51.8497 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+0 50 moveto
+4.32585 49.2502 4.90911 49.1491 8.22573 49.6967 curveto stroke
+newpath 9.50734 49.9147 moveto 8.30118 49.2531 lineto 8.15028 50.1403 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+10 50 moveto
+5.67415 50.7498 5.09089 50.8509 1.77427 50.3033 curveto stroke
+newpath 0.492664 50.0853 moveto 1.69882 50.7469 lineto 1.84972 49.8597 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+0 80 moveto
+4.32585 79.2502 4.90911 79.1491 8.22573 79.6967 curveto stroke
+newpath 9.50734 79.9147 moveto 8.30118 79.2531 lineto 8.15028 80.1403 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+10 80 moveto
+5.67415 80.7498 5.09089 80.8509 1.77427 80.3033 curveto stroke
+newpath 0.492664 80.0853 moveto 1.69882 80.7469 lineto 1.84972 79.8597 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+10 0 moveto
+14.3259 -0.749815 14.9091 -0.850912 18.2257 -0.303291 curveto stroke
+newpath 19.5073 -0.0853272 moveto 18.3012 -0.746921 lineto 18.1503 0.140339 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+20 0 moveto
+15.6741 0.749815 15.0909 0.850912 11.7743 0.303291 curveto stroke
+newpath 10.4927 0.0853272 moveto 11.6988 0.746921 lineto 11.8497 -0.140339 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+10 30 moveto
+14.3259 29.2502 14.9091 29.1491 18.2257 29.6967 curveto stroke
+newpath 19.5073 29.9147 moveto 18.3012 29.2531 lineto 18.1503 30.1403 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+20 30 moveto
+15.6741 30.7498 15.0909 30.8509 11.7743 30.3033 curveto stroke
+newpath 10.4927 30.0853 moveto 11.6988 30.7469 lineto 11.8497 29.8597 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+10 50 moveto
+14.3259 49.2502 14.9091 49.1491 18.2257 49.6967 curveto stroke
+newpath 19.5073 49.9147 moveto 18.3012 49.2531 lineto 18.1503 50.1403 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+20 50 moveto
+15.6741 50.7498 15.0909 50.8509 11.7743 50.3033 curveto stroke
+newpath 10.4927 50.0853 moveto 11.6988 50.7469 lineto 11.8497 49.8597 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+10 80 moveto
+10.7498 84.3259 10.8509 84.9091 10.3033 88.2257 curveto stroke
+newpath 10.0853 89.5073 moveto 10.7469 88.3012 lineto 9.85966 88.1503 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+10 90 moveto
+9.25019 85.6741 9.14909 85.0909 9.69671 81.7743 curveto stroke
+newpath 9.91467 80.4927 moveto 9.25308 81.6988 lineto 10.1403 81.8497 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+10 90 moveto
+14.3259 89.2502 14.9091 89.1491 18.2257 89.6967 curveto stroke
+newpath 19.5073 89.9147 moveto 18.3012 89.2531 lineto 18.1503 90.1403 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+20 90 moveto
+15.6741 90.7498 15.0909 90.8509 11.7743 90.3033 curveto stroke
+newpath 10.4927 90.0853 moveto 11.6988 90.7469 lineto 11.8497 89.8597 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+20 0 moveto
+20.7498 4.32585 20.8509 4.90911 20.3033 8.22573 curveto stroke
+newpath 20.0853 9.50734 moveto 20.7469 8.30118 lineto 19.8597 8.15028 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+20 10 moveto
+19.2502 5.67415 19.1491 5.09089 19.6967 1.77427 curveto stroke
+newpath 19.9147 0.492664 moveto 19.2531 1.69882 lineto 20.1403 1.84972 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+20 10 moveto
+20.7498 14.3259 20.8509 14.9091 20.3033 18.2257 curveto stroke
+newpath 20.0853 19.5073 moveto 20.7469 18.3012 lineto 19.8597 18.1503 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+20 20 moveto
+19.2502 15.6741 19.1491 15.0909 19.6967 11.7743 curveto stroke
+newpath 19.9147 10.4927 moveto 19.2531 11.6988 lineto 20.1403 11.8497 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+20 20 moveto
+20.7498 24.3259 20.8509 24.9091 20.3033 28.2257 curveto stroke
+newpath 20.0853 29.5073 moveto 20.7469 28.3012 lineto 19.8597 28.1503 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+20 30 moveto
+19.2502 25.6741 19.1491 25.0909 19.6967 21.7743 curveto stroke
+newpath 19.9147 20.4927 moveto 19.2531 21.6988 lineto 20.1403 21.8497 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+20 50 moveto
+20.7498 54.3259 20.8509 54.9091 20.3033 58.2257 curveto stroke
+newpath 20.0853 59.5073 moveto 20.7469 58.3012 lineto 19.8597 58.1503 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+20 60 moveto
+19.2502 55.6741 19.1491 55.0909 19.6967 51.7743 curveto stroke
+newpath 19.9147 50.4927 moveto 19.2531 51.6988 lineto 20.1403 51.8497 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+20 60 moveto
+24.3259 59.2502 24.9091 59.1491 28.2257 59.6967 curveto stroke
+newpath 29.5073 59.9147 moveto 28.3012 59.2531 lineto 28.1503 60.1403 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+30 60 moveto
+25.6741 60.7498 25.0909 60.8509 21.7743 60.3033 curveto stroke
+newpath 20.4927 60.0853 moveto 21.6988 60.7469 lineto 21.8497 59.8597 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+20 90 moveto
+24.3259 89.2502 24.9091 89.1491 28.2257 89.6967 curveto stroke
+newpath 29.5073 89.9147 moveto 28.3012 89.2531 lineto 28.1503 90.1403 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+30 90 moveto
+25.6741 90.7498 25.0909 90.8509 21.7743 90.3033 curveto stroke
+newpath 20.4927 90.0853 moveto 21.6988 90.7469 lineto 21.8497 89.8597 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+30 60 moveto
+34.3259 59.2502 34.9091 59.1491 38.2257 59.6967 curveto stroke
+newpath 39.5073 59.9147 moveto 38.3012 59.2531 lineto 38.1503 60.1403 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+40 60 moveto
+35.6741 60.7498 35.0909 60.8509 31.7743 60.3033 curveto stroke
+newpath 30.4927 60.0853 moveto 31.6988 60.7469 lineto 31.8497 59.8597 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+30 80 moveto
+30.7498 84.3259 30.8509 84.9091 30.3033 88.2257 curveto stroke
+newpath 30.0853 89.5073 moveto 30.7469 88.3012 lineto 29.8597 88.1503 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+30 90 moveto
+29.2502 85.6741 29.1491 85.0909 29.6967 81.7743 curveto stroke
+newpath 29.9147 80.4927 moveto 29.2531 81.6988 lineto 30.1403 81.8497 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+30 80 moveto
+34.3259 79.2502 34.9091 79.1491 38.2257 79.6967 curveto stroke
+newpath 39.5073 79.9147 moveto 38.3012 79.2531 lineto 38.1503 80.1403 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+40 80 moveto
+35.6741 80.7498 35.0909 80.8509 31.7743 80.3033 curveto stroke
+newpath 30.4927 80.0853 moveto 31.6988 80.7469 lineto 31.8497 79.8597 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+40 0 moveto
+40.7498 4.32585 40.8509 4.90911 40.3033 8.22573 curveto stroke
+newpath 40.0853 9.50734 moveto 40.7469 8.30118 lineto 39.8597 8.15028 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+40 10 moveto
+39.2502 5.67415 39.1491 5.09089 39.6967 1.77427 curveto stroke
+newpath 39.9147 0.492664 moveto 39.2531 1.69882 lineto 40.1403 1.84972 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+40 0 moveto
+44.3259 -0.749815 44.9091 -0.850912 48.2257 -0.303291 curveto stroke
+newpath 49.5073 -0.0853272 moveto 48.3012 -0.746921 lineto 48.1503 0.140339 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+50 0 moveto
+45.6741 0.749815 45.0909 0.850912 41.7743 0.303291 curveto stroke
+newpath 40.4927 0.0853272 moveto 41.6988 0.746921 lineto 41.8497 -0.140339 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+40 10 moveto
+40.7498 14.3259 40.8509 14.9091 40.3033 18.2257 curveto stroke
+newpath 40.0853 19.5073 moveto 40.7469 18.3012 lineto 39.8597 18.1503 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+40 20 moveto
+39.2502 15.6741 39.1491 15.0909 39.6967 11.7743 curveto stroke
+newpath 39.9147 10.4927 moveto 39.2531 11.6988 lineto 40.1403 11.8497 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+40 20 moveto
+40.7498 24.3259 40.8509 24.9091 40.3033 28.2257 curveto stroke
+newpath 40.0853 29.5073 moveto 40.7469 28.3012 lineto 39.8597 28.1503 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+40 30 moveto
+39.2502 25.6741 39.1491 25.0909 39.6967 21.7743 curveto stroke
+newpath 39.9147 20.4927 moveto 39.2531 21.6988 lineto 40.1403 21.8497 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+40 20 moveto
+44.3259 19.2502 44.9091 19.1491 48.2257 19.6967 curveto stroke
+newpath 49.5073 19.9147 moveto 48.3012 19.2531 lineto 48.1503 20.1403 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+50 20 moveto
+45.6741 20.7498 45.0909 20.8509 41.7743 20.3033 curveto stroke
+newpath 40.4927 20.0853 moveto 41.6988 20.7469 lineto 41.8497 19.8597 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+40 30 moveto
+40.7498 34.3259 40.8509 34.9091 40.3033 38.2257 curveto stroke
+newpath 40.0853 39.5073 moveto 40.7469 38.3012 lineto 39.8597 38.1503 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+40 40 moveto
+39.2502 35.6741 39.1491 35.0909 39.6967 31.7743 curveto stroke
+newpath 39.9147 30.4927 moveto 39.2531 31.6988 lineto 40.1403 31.8497 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+40 40 moveto
+40.7498 44.3259 40.8509 44.9091 40.3033 48.2257 curveto stroke
+newpath 40.0853 49.5073 moveto 40.7469 48.3012 lineto 39.8597 48.1503 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+40 50 moveto
+39.2502 45.6741 39.1491 45.0909 39.6967 41.7743 curveto stroke
+newpath 39.9147 40.4927 moveto 39.2531 41.6988 lineto 40.1403 41.8497 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+40 50 moveto
+40.7498 54.3259 40.8509 54.9091 40.3033 58.2257 curveto stroke
+newpath 40.0853 59.5073 moveto 40.7469 58.3012 lineto 39.8597 58.1503 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+40 60 moveto
+39.2502 55.6741 39.1491 55.0909 39.6967 51.7743 curveto stroke
+newpath 39.9147 50.4927 moveto 39.2531 51.6988 lineto 40.1403 51.8497 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+40 60 moveto
+40.7498 64.3259 40.8509 64.9091 40.3033 68.2257 curveto stroke
+newpath 40.0853 69.5073 moveto 40.7469 68.3012 lineto 39.8597 68.1503 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+40 70 moveto
+39.2502 65.6741 39.1491 65.0909 39.6967 61.7743 curveto stroke
+newpath 39.9147 60.4927 moveto 39.2531 61.6988 lineto 40.1403 61.8497 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+40 70 moveto
+40.7498 74.3259 40.8509 74.9091 40.3033 78.2257 curveto stroke
+newpath 40.0853 79.5073 moveto 40.7469 78.3012 lineto 39.8597 78.1503 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+40 80 moveto
+39.2502 75.6741 39.1491 75.0909 39.6967 71.7743 curveto stroke
+newpath 39.9147 70.4927 moveto 39.2531 71.6988 lineto 40.1403 71.8497 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+50 0 moveto
+54.3259 -0.749815 54.9091 -0.850912 58.2257 -0.303291 curveto stroke
+newpath 59.5073 -0.0853272 moveto 58.3012 -0.746921 lineto 58.1503 0.140339 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+60 0 moveto
+55.6741 0.749815 55.0909 0.850912 51.7743 0.303291 curveto stroke
+newpath 50.4927 0.0853272 moveto 51.6988 0.746921 lineto 51.8497 -0.140339 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+50 20 moveto
+54.3259 19.2502 54.9091 19.1491 58.2257 19.6967 curveto stroke
+newpath 59.5073 19.9147 moveto 58.3012 19.2531 lineto 58.1503 20.1403 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+60 20 moveto
+55.6741 20.7498 55.0909 20.8509 51.7743 20.3033 curveto stroke
+newpath 50.4927 20.0853 moveto 51.6988 20.7469 lineto 51.8497 19.8597 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+60 0 moveto
+64.3259 -0.749815 64.9091 -0.850912 68.2257 -0.303291 curveto stroke
+newpath 69.5073 -0.0853272 moveto 68.3012 -0.746921 lineto 68.1503 0.140339 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+70 0 moveto
+65.6741 0.749815 65.0909 0.850912 61.7743 0.303291 curveto stroke
+newpath 60.4927 0.0853272 moveto 61.6988 0.746921 lineto 61.8497 -0.140339 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+60 20 moveto
+60.7498 24.3259 60.8509 24.9091 60.3033 28.2257 curveto stroke
+newpath 60.0853 29.5073 moveto 60.7469 28.3012 lineto 59.8597 28.1503 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+60 30 moveto
+59.2502 25.6741 59.1491 25.0909 59.6967 21.7743 curveto stroke
+newpath 59.9147 20.4927 moveto 59.2531 21.6988 lineto 60.1403 21.8497 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+60 20 moveto
+64.3259 19.2502 64.9091 19.1491 68.2257 19.6967 curveto stroke
+newpath 69.5073 19.9147 moveto 68.3012 19.2531 lineto 68.1503 20.1403 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+70 20 moveto
+65.6741 20.7498 65.0909 20.8509 61.7743 20.3033 curveto stroke
+newpath 60.4927 20.0853 moveto 61.6988 20.7469 lineto 61.8497 19.8597 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+60 30 moveto
+60.7498 34.3259 60.8509 34.9091 60.3033 38.2257 curveto stroke
+newpath 60.0853 39.5073 moveto 60.7469 38.3012 lineto 59.8597 38.1503 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+60 40 moveto
+59.2502 35.6741 59.1491 35.0909 59.6967 31.7743 curveto stroke
+newpath 59.9147 30.4927 moveto 59.2531 31.6988 lineto 60.1403 31.8497 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+60 40 moveto
+64.3259 39.2502 64.9091 39.1491 68.2257 39.6967 curveto stroke
+newpath 69.5073 39.9147 moveto 68.3012 39.2531 lineto 68.1503 40.1403 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+70 40 moveto
+65.6741 40.7498 65.0909 40.8509 61.7743 40.3033 curveto stroke
+newpath 60.4927 40.0853 moveto 61.6988 40.7469 lineto 61.8497 39.8597 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+60 70 moveto
+60.7498 74.3259 60.8509 74.9091 60.3033 78.2257 curveto stroke
+newpath 60.0853 79.5073 moveto 60.7469 78.3012 lineto 59.8597 78.1503 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+60 80 moveto
+59.2502 75.6741 59.1491 75.0909 59.6967 71.7743 curveto stroke
+newpath 59.9147 70.4927 moveto 59.2531 71.6988 lineto 60.1403 71.8497 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+60 70 moveto
+64.3259 69.2502 64.9091 69.1491 68.2257 69.6967 curveto stroke
+newpath 69.5073 69.9147 moveto 68.3012 69.2531 lineto 68.1503 70.1403 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+70 70 moveto
+65.6741 70.7498 65.0909 70.8509 61.7743 70.3033 curveto stroke
+newpath 60.4927 70.0853 moveto 61.6988 70.7469 lineto 61.8497 69.8597 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+60 80 moveto
+60.7498 84.3259 60.8509 84.9091 60.3033 88.2257 curveto stroke
+newpath 60.0853 89.5073 moveto 60.7469 88.3012 lineto 59.8597 88.1503 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+60 90 moveto
+59.2502 85.6741 59.1491 85.0909 59.6967 81.7743 curveto stroke
+newpath 59.9147 80.4927 moveto 59.2531 81.6988 lineto 60.1403 81.8497 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+60 90 moveto
+64.3259 89.2502 64.9091 89.1491 68.2257 89.6967 curveto stroke
+newpath 69.5073 89.9147 moveto 68.3012 89.2531 lineto 68.1503 90.1403 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+70 90 moveto
+65.6741 90.7498 65.0909 90.8509 61.7743 90.3033 curveto stroke
+newpath 60.4927 90.0853 moveto 61.6988 90.7469 lineto 61.8497 89.8597 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+70 40 moveto
+70.7498 44.3259 70.8509 44.9091 70.3033 48.2257 curveto stroke
+newpath 70.0853 49.5073 moveto 70.7469 48.3012 lineto 69.8597 48.1503 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+70 50 moveto
+69.2502 45.6741 69.1491 45.0909 69.6967 41.7743 curveto stroke
+newpath 69.9147 40.4927 moveto 69.2531 41.6988 lineto 70.1403 41.8497 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+70 50 moveto
+70.7498 54.3259 70.8509 54.9091 70.3033 58.2257 curveto stroke
+newpath 70.0853 59.5073 moveto 70.7469 58.3012 lineto 69.8597 58.1503 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+70 60 moveto
+69.2502 55.6741 69.1491 55.0909 69.6967 51.7743 curveto stroke
+newpath 69.9147 50.4927 moveto 69.2531 51.6988 lineto 70.1403 51.8497 lineto closepath fill
+0.3 setlinewidth 1 0 0 setrgbcolor newpath
+70 60 moveto
+70.7498 64.3259 70.8509 64.9091 70.3033 68.2257 curveto stroke
+newpath 70.0853 69.5073 moveto 70.7469 68.3012 lineto 69.8597 68.1503 lineto closepath fill
+0.3 setlinewidth 0 0 0 setrgbcolor newpath
+70 70 moveto
+69.2502 65.6741 69.1491 65.0909 69.6967 61.7743 curveto stroke
+newpath 69.9147 60.4927 moveto 69.2531 61.6988 lineto 70.1403 61.8497 lineto closepath fill
+grestore
+%Nodes:
+gsave
+70 90 0.5 1 1 1 nc
+70 70 0.5 1 1 1 nc
+70 60 0.5 1 1 1 nc
+70 50 0.5 1 1 1 nc
+70 40 0.5 1 1 1 nc
+70 20 0.5 1 1 1 nc
+70 0 0.5 1 1 1 nc
+60 90 0.5 1 1 1 nc
+60 80 0.5 1 1 1 nc
+60 70 0.5 1 1 1 nc
+60 40 0.5 1 1 1 nc
+60 30 0.5 1 1 1 nc
+60 20 0.5 1 1 1 nc
+60 0 0.5 1 1 1 nc
+50 20 0.5 1 1 1 nc
+50 0 0.5 1 1 1 nc
+40 80 0.5 1 1 1 nc
+40 70 0.5 1 1 1 nc
+40 60 0.5 1 1 1 nc
+40 50 0.5 1 1 1 nc
+40 40 0.5 1 1 1 nc
+40 30 0.5 1 1 1 nc
+40 20 0.5 1 1 1 nc
+40 10 0.5 1 1 1 nc
+40 0 0.5 1 1 1 nc
+30 90 0.5 1 1 1 nc
+30 80 0.5 1 1 1 nc
+30 60 0.5 1 1 1 nc
+20 90 0.5 1 1 1 nc
+20 60 0.5 1 1 1 nc
+20 50 0.5 1 1 1 nc
+20 30 0.5 1 1 1 nc
+20 20 0.5 1 1 1 nc
+20 10 0.5 1 1 1 nc
+20 0 0.5 1 1 1 nc
+10 90 0.5 1 1 1 nc
+10 80 0.5 1 1 1 nc
+10 50 0.5 1 1 1 nc
+10 30 0.5 1 1 1 nc
+10 0 0.5 1 1 1 nc
+0 80 0.5 1 1 1 nc
+0 60 0.5 1 1 1 nc
+0 50 0.5 1 1 1 nc
+0 40 0.5 1 1 1 nc
+0 30 0.5 1 1 1 nc
+0 10 0.5 1 1 1 nc
+0 0 0.5 1 1 1 nc
+grestore
+grestore
+showpage
