facetedBox method

BufferGeometry facetedBox(double w, double h, double d, double f,)

Implementation

BufferGeometry facetedBox(double w,double h,double d,double f){
  final hw = w * 0.5,
  hh = h * 0.5,
  hd = d * 0.5;

  final List<double> vertices = [
    // px
    hw, hh - f, -hd + f,   // 0
    hw, -hh + f, -hd + f,  // 1
    hw, -hh + f, hd - f,   // 2
    hw, hh - f, hd - f,    // 3

    // pz
    hw - f, hh - f, hd,    // 4
    hw - f, -hh + f, hd,   // 5
    -hw + f, -hh + f, hd,  // 6
    -hw + f, hh - f, hd,   // 7

    // nx
    -hw, hh - f, hd - f,   // 8
    -hw, -hh + f, hd - f,  // 9
    -hw, -hh + f, -hd + f, // 10
    -hw, hh - f, -hd + f,  // 11

    // nz
    -hw + f, hh - f, -hd,  // 12
    -hw + f, -hh + f, -hd, // 13
    hw - f, -hh + f, -hd,  // 14
    hw - f, hh - f, -hd,   // 15

    // py
    hw - f, hh, -hd + f,   // 16
    hw - f, hh, hd - f,    // 17
    -hw + f, hh, hd - f,   // 18
    -hw + f, hh, -hd + f,  // 19

    // ny
    hw - f, -hh, -hd + f,  // 20
    hw - f, -hh, hd - f,   // 21
    -hw + f, -hh, hd - f,  // 22
    -hw + f, -hh, -hd + f  // 23
  ];

  final indices = [
    0, 2, 1, 3, 2, 0,
    4, 6, 5, 7, 6, 4,
    8, 10, 9, 11, 10, 8,
    12, 14, 13, 15, 14, 12,
    16, 18, 17, 19, 18, 16,
    20, 21, 22, 23, 20, 22,

    // link the sides
    3, 5, 2, 4, 5, 3,
    7, 9, 6, 8, 9, 7,
    11, 13, 10, 12, 13, 11,
    15, 1, 14, 0, 1, 15,

    // link the lids
    // top
    16, 3, 0, 17, 3, 16,
    17, 7, 4, 18, 7, 17,
    18, 11, 8, 19, 11, 18,
    19, 15, 12, 16, 15, 19,
    // bottom
    1, 21, 20, 2, 21, 1,
    5, 22, 21, 6, 22, 5,
    9, 23, 22, 10, 23, 9,
    13, 20, 23, 14, 20, 13,

    // corners
    // top
    3, 17, 4,
    7, 18, 8,
    11, 19, 12,
    15, 16, 0,
    // bottom
    2, 5, 21,
    6, 9, 22,
    10, 13, 23,
    14, 1, 20
  ];

  final geom = BufferGeometry();
  geom.setAttributeFromString(
    "position",
    Float32BufferAttribute.fromList(vertices, 3)
  );
  geom.setIndex(indices);
  geom.computeVertexNormals();

  return geom;
}