Mine

// declaration:
template<typename border_t>
class sds_mipmap
{
public:
 sds_mipmap(const border_t& Top, const border_t& Right, const border_t& Bottom, const border_t& Left, const point_array& ParentPoints, int Level, double Size) : m_parent_points(ParentPoints), m_level(Level), m_size(Size), m_points(boost::extents[Size][Size]), m_valid(false)
 {
  // initialise border points
  for (int i = 0; i < m_size; ++i)
  {
   m_points[0][i] = Left.at(i);
   m_points[i][0] = Bottom.at(i);
   m_points[m_size-1][i] = Right.at(i);
   m_points[i][m_size-1] = Top.at(i);
  }

  // initialise other points
  for (int i = 1; i < m_size-1; ++i)
  {
   for (int j = 1; j < m_size-1; ++j)
   {
    m_points[i][j] = new k3d::point(0.0,0.0,0.0);
   }
  }
 }

 void update();

private:
 const point_array& m_parent_points;
 int m_level;
 int m_size;
 point_array m_points;
 bool m_valid;
};

// implementation of update:
void libk3dmesh::detail::sds_mipmap::update( )
{
}