public TriangleIndices[] TrianglesByFace(HalfAxis.HAxis axis)
{
TriangleIndices[] tri = new TriangleIndices[2];
ulong n = (ulong)axis;
switch (axis)
{
case HalfAxis.HAxis.AXIS_X_N:
tri[0] = new TriangleIndices(0, 4, 3, n, n, n, 1, 2, 0);
tri[1] = new TriangleIndices(3, 4, 7, n, n, n, 0, 2, 3);
break;
case HalfAxis.HAxis.AXIS_X_P:
tri[0] = new TriangleIndices(1, 2, 5, n, n, n, 0, 1, 3);
tri[1] = new TriangleIndices(5, 2, 6, n, n, n, 3, 1, 2);
break;
case HalfAxis.HAxis.AXIS_Y_N:
tri[0] = new TriangleIndices(0, 1, 4, n, n, n, 0, 1, 3);
tri[1] = new TriangleIndices(4, 1, 5, n, n, n, 3, 1, 2);
break;
case HalfAxis.HAxis.AXIS_Y_P:
tri[0] = new TriangleIndices(7, 6, 2, n, n, n, 2, 3, 0);
tri[1] = new TriangleIndices(7, 2, 3, n, n, n, 2, 0, 1);
break;
case HalfAxis.HAxis.AXIS_Z_N:
tri[0] = new TriangleIndices(0, 3, 1, n, n, n, 2, 0, 3);
tri[1] = new TriangleIndices(1, 3, 2, n, n, n, 3, 0, 1);
break;
case HalfAxis.HAxis.AXIS_Z_P:
tri[0] = new TriangleIndices(4, 5, 7, n, n, n, 0, 1, 2);
tri[1] = new TriangleIndices(7, 5, 6, n, n, n, 2, 1, 3);
break;
default:
Debug.Assert(false);
break;
}
return tri;
}