code: def add(self, personID, edgeID, pos, depart=DEPART_NOW, typeID="DEFAULT_PEDTYPE"):
          
          if depart > 0:
              depart *= 1000
          self._connection._beginMessage(tc.CMD_SET_PERSON_VARIABLE, tc.ADD, personID,
                                         1 + 4 + 1 + 4 + len(typeID) + 1 + 4 + len(edgeID) + 1 + 4 + 1 + 8)
          self._connection._string += struct.pack("!Bi", tc.TYPE_COMPOUND, 4)
          self._connection._packString(typeID)
          self._connection._packString(edgeID)
          self._connection._string += struct.pack("!Bi", tc.TYPE_INTEGER, depart)
          self._connection._string += struct.pack("!Bd", tc.TYPE_DOUBLE, pos)
          self._connection._sendExact()
docs: add(string, string, double, int, string)
          Inserts a new person to the simulation at the given edge, position and
          time (in s). This function should be followed by appending Stages or the person
          will immediatly vanish on departure.