Returns the currently visible state of the world as a numpy array
            of doubles.

def getSensors(self):
        """ Returns the currently visible state of the world as a numpy array
            of doubles.
        """
        sensors = array([])
        sensors = r_[sensors, self._getTotalDemandSensor()]
#        sensors = r_[sensors, self._getDemandSensor()]
#        sensors = r_[sensors, self._getPriceSensor()]

#        sensors = r_[sensors, self._getBusVoltageSensor()]

#        sensors = r_[sensors, self._getBusVoltageMagnitudeSensor()]
#        sensors = r_[sensors, self._getBusVoltageLambdaSensor()]
#        sensors = r_[sensors, self._getBranchFlowSensor()]

#        logger.info("State: %s" % sensors)

        return sensors