[9] | 1 | /* graph.mod - graph visualization */ |
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| 2 | |
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| 3 | /* Written in GNU MathProg by Andrew Makhorin <mao@gnu.org> */ |
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| 4 | |
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| 5 | /* This model creates a picture in EPS format to visualize a graph. */ |
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| 6 | |
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| 7 | param file, symbolic, default "graph.eps"; |
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| 8 | /* output file to write the picture */ |
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| 9 | |
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| 10 | param R, default 2; |
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| 11 | /* radius to draw vertices, in mm */ |
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| 12 | |
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| 13 | param n, integer, > 0; |
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| 14 | /* number of vertices */ |
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| 15 | |
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| 16 | set V, default 1..n; |
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| 17 | /* set of vertices */ |
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| 18 | |
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| 19 | set E, within V cross V; |
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| 20 | /* set of edges */ |
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| 21 | |
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| 22 | param x{i in V}, default 50 * cos((i - 1) / card(V) * 8 * atan(1)); |
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| 23 | param y{i in V}, default 50 * sin((i - 1) / card(V) * 8 * atan(1)); |
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| 24 | /* x[i] and y[i] are coordinates of node i, in mm */ |
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| 25 | |
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| 26 | param x0 := (min{i in V} x[i]) - R - 3.0; |
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| 27 | param y0 := (min{i in V} y[i]) - R - 3.0; |
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| 28 | param x1 := (max{i in V} x[i]) + R + 3.0; |
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| 29 | param y1 := (max{i in V} y[i]) + R + 3.0; |
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| 30 | |
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| 31 | printf "%%!PS-Adobe-3.0 EPSF-3.0\n" > file; |
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| 32 | printf "%%%%BoundingBox: 0 0 %d %d\n", |
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| 33 | (72 / 25.4) * (x1 - x0), (72 / 25.4) * (y1 - y0) >> file; |
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| 34 | printf "/Helvetica findfont 6 scalefont setfont\n" >> file; |
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| 35 | printf "/mm { 72 mul 25.4 div } def\n" >> file; |
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| 36 | |
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| 37 | for {(i,j) in E} |
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| 38 | { printf "newpath\n" >> file; |
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| 39 | printf "%g mm %g mm moveto\n", x[i] - x0, y[i] - y0 >> file; |
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| 40 | printf "%g mm %g mm lineto\n", x[j] - x0, y[j] - y0 >> file; |
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| 41 | printf "closepath\n" >> file; |
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| 42 | printf "stroke\n" >> file; |
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| 43 | } |
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| 44 | |
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| 45 | for {i in V} |
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| 46 | { printf "newpath\n" >> file; |
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| 47 | printf "%g mm %g mm %g mm 0 360 arc\n", |
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| 48 | x[i] - x0, y[i] - y0, R >> file; |
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| 49 | printf "closepath\n" >> file; |
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| 50 | printf "gsave 1 1 1 setrgbcolor fill grestore\n" >> file; |
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| 51 | printf "stroke\n" >> file; |
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| 52 | printf "%g mm %g mm moveto\n", |
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| 53 | x[i] - (if i <= 9 then 1.2 else 1.8) - x0, |
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| 54 | y[i] - 0.8 - y0 >> file; |
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| 55 | printf "( %d ) show\n", i >> file; |
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| 56 | } |
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| 57 | |
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| 58 | printf "showpage\n" >> file; |
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| 59 | printf "%%%%EOF\n" >> file; |
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| 60 | |
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| 61 | data; |
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| 62 | |
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| 63 | param |
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| 64 | : V : x y := |
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| 65 | 1 0 40 |
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| 66 | 2 38 12 |
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| 67 | 3 24 -32 |
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| 68 | 4 -24 -32 |
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| 69 | 5 -38 12 |
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| 70 | 6 -19 26 |
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| 71 | 7 19 26 |
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| 72 | 8 31 -10 |
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| 73 | 9 0 -32 |
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| 74 | 10 -31 -10 |
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| 75 | 11 -9 12 |
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| 76 | 12 9 12 |
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| 77 | 13 14 -5 |
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| 78 | 14 0 -15 |
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| 79 | 15 -14 -5 |
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| 80 | 16 0 0 ; |
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| 81 | |
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| 82 | set E := |
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| 83 | (1,*) 6 10 16 12 7 |
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| 84 | (2,*) 7 6 16 13 8 |
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| 85 | (3,*) 8 7 16 14 9 |
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| 86 | (4,*) 9 8 16 15 10 |
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| 87 | (5,*) 10 9 16 11 6 |
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| 88 | (6,*) 14 |
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| 89 | (7,*) 15 |
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| 90 | (8,*) 11 |
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| 91 | (9,*) 12 |
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| 92 | (10,*) 13 |
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| 93 | (11,*) 12 15 |
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| 94 | (12,*) 13 |
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| 95 | (13,*) 14 |
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| 96 | (14,*) 15 ; |
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| 97 | |
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| 98 | end; |
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