public IdealTetrahedron[] getSurroundingCBr4() {
    IdealTetrahedron[] surrounding = new IdealTetrahedron[length];

    int index = 0;

    TwoNodeCBr4 temp = first.getNext();

    while (temp != last) {
      surrounding[index] = temp.getValue();
      index++;
      temp = temp.getNext();
    }
    return surrounding;
  }