def move_distance(self, distance_x_m, distance_y_m, distance_z_m,
                      velocity=DEFAULT):
        """
        Move in a straight line.
        positive X is forward
        positive Y is left
        positive Z is up

        :param distance_x_m: The distance to travel along the X-axis (meters)
        :param distance_y_m: The distance to travel along the Y-axis (meters)
        :param distance_z_m: The distance to travel along the Z-axis (meters)
        :param velocity: the velocity of the motion (meters/second)
        :return:
        """

        x = self._x + distance_x_m
        y = self._y + distance_y_m
        z = self._z + distance_z_m

        self.go_to(x, y, z, velocity)
Move in a straight line.
        positive X is forward
        positive Y is left
        positive Z is up

        :param distance_x_m: The distance to travel along the X-axis (meters)
        :param distance_y_m: The distance to travel along the Y-axis (meters)
        :param distance_z_m: The distance to travel along the Z-axis (meters)
        :param velocity: the velocity of the motion (meters/second)
        :return: