typedef boost::array<k3d::point*, 2> border_parent_t;

// method 1:
border_parent_t* parent = new border_parent_t();
(*parent)[0] = Start;
(*parent)[1] = End;

// method 2:
border_parent_t& parent = *(new border_parent_t());
parent[0] = Start;
parent[1] = End;