DodecahedronGeometry constructor

DodecahedronGeometry([ double radius = 1, int detail = 0 ])

radius — Radius of the dodecahedron. Default is 1.

detail — Default is 0. Setting this to a value greater than 0 adds vertices making it no longer a dodecahedron.

Implementation

factory DodecahedronGeometry([double radius = 1, int detail = 0]) {
  final t = (1 + math.sqrt(5)) / 2;
  final r = 1 / t;

  List<double> vertices = [
    // (±1, ±1, ±1)
    -1, -1, -1, -1, -1, 1,
    -1, 1, -1, -1, 1, 1,
    1, -1, -1, 1, -1, 1,
    1, 1, -1, 1, 1, 1,

    // (0, ±1/φ, ±φ)
    0, -r, -t, 0, -r, t,
    0, r, -t, 0, r, t,

    // (±1/φ, ±φ, 0)
    -r, -t, 0, -r, t, 0,
    r, -t, 0, r, t, 0,

    // (±φ, 0, ±1/φ)
    -t, 0, -r, t, 0, -r,
    -t, 0, r, t, 0, r
  ];

  List<int> indices = [
    3,
    11,
    7,
    3,
    7,
    15,
    3,
    15,
    13,
    7,
    19,
    17,
    7,
    17,
    6,
    7,
    6,
    15,
    17,
    4,
    8,
    17,
    8,
    10,
    17,
    10,
    6,
    8,
    0,
    16,
    8,
    16,
    2,
    8,
    2,
    10,
    0,
    12,
    1,
    0,
    1,
    18,
    0,
    18,
    16,
    6,
    10,
    2,
    6,
    2,
    13,
    6,
    13,
    15,
    2,
    16,
    18,
    2,
    18,
    3,
    2,
    3,
    13,
    18,
    1,
    9,
    18,
    9,
    11,
    18,
    11,
    3,
    4,
    14,
    12,
    4,
    12,
    0,
    4,
    0,
    8,
    11,
    9,
    5,
    11,
    5,
    19,
    11,
    19,
    7,
    19,
    5,
    14,
    19,
    14,
    4,
    19,
    4,
    17,
    1,
    12,
    14,
    1,
    14,
    5,
    1,
    5,
    9
  ];

  DodecahedronGeometry dbg = DodecahedronGeometry.create(vertices, indices, radius, detail);

  return dbg;
}