aabbSurfaceArea (AABB n x) = 2 * ((dx d * dy d) + (dx d * dz d) + (dy d * dz d))
  where d = x .-. n
aabbSurfaceArea (AABB n x) = 2 * ((dx d * dy d) + (dx d * dz d) + (dy d * dz d))
  where d = x .-. n
aabbSurfaceArea (AABB n x) = 2 * ((dx d * dy d) + (dx d * dz d) + (dy d * dz d))
  where d = x .-. n