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7 |
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8 | import { atan, degrees } from "./math.js";
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9 | import voronoi from "./polyhedral/voronoi.js";
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10 |
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11 |
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12 | export default function() {
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13 | var theta = atan(0.5) * degrees;
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14 |
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15 |
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16 |
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17 | var vertices = [[0, 90], [0, -90]].concat(
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18 | [0,1,2,3,4,5,6,7,8,9].map(function(i) {
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19 | var phi = (i * 36 + 180) % 360 - 180;
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20 | return [phi, i & 1 ? theta : -theta];
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21 | })
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22 | );
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23 |
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24 |
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25 | var polyhedron = [
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26 | [0, 3, 11],
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27 | [0, 5, 3],
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28 | [0, 7, 5],
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29 | [0, 9, 7],
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30 | [0, 11, 9],
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31 | [2, 11, 3],
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32 | [3, 4, 2],
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33 | [4, 3, 5],
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34 | [5, 6, 4],
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35 | [6, 5, 7],
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36 | [7, 8, 6],
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37 | [8, 7, 9],
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38 | [9, 10, 8],
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39 | [10, 9, 11],
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40 | [11, 2, 10],
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41 | [1, 2, 4],
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42 | [1, 4, 6],
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43 | [1, 6, 8],
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44 | [1, 8, 10],
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45 | [1, 10, 2]
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46 | ].map(function(face) {
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47 | return face.map(function(i) {
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48 | return vertices[i];
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49 | });
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50 | });
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51 |
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52 | var polygons = {
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53 | type: "FeatureCollection",
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54 | features: polyhedron.map(function(face) {
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55 | face.push(face[0]);
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56 | return {
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57 | geometry: {
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58 | type: "Polygon",
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59 | coordinates: [ face ]
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60 | }
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61 | };
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62 | })
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63 | };
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64 |
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65 | var parents = [
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66 |
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67 | -1,
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68 | 7,
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69 | 9,
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70 | 11,
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71 | 13,
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72 |
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73 |
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74 | 0,
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75 | 5,
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76 | 6,
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77 | 7,
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78 | 8,
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79 |
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80 | 9,
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81 | 10,
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82 | 11,
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83 | 12,
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84 | 13,
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85 |
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86 |
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87 | 6,
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88 | 8,
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89 | 10,
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90 | 12,
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91 | 14,
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92 | ];
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93 |
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94 | return voronoi()
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95 | .parents(parents)
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96 | .angle(0)
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97 | .polygons(polygons)
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98 | .rotate([108,0])
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99 | .scale(131.777)
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100 | .center([162, 0]);
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101 | }
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102 |
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