Controlling game processing using determined rotational direction in combination with determined up/down direction

An information processing apparatus including a computer, the computer being configured to:

• acquire, from an operation device having an inertial sensor, operation data including at least data based on an output of the inertial sensor;
• determine whether or not the operation device is in a swing state in which the operation device is being swung, on the basis of the operation data;
• determine whether the operation device is rotated in a first direction about a predetermined axis of the inertial sensor or a second direction opposite to the first direction, on the basis of the operation data;
• determine whether the operation device is swung in an upward direction or a downward direction, on the basis of the operation data;
• execute first processing in at least a case where it is determined that the operation device is rotated in the first direction about the predetermined axis and a case where it is determined that the operation device is swung in the upward direction, during a period in which the operation device is in the swing state, on the basis of the operation data;
• and
• execute second processing in at least a case where it is determined that the operation device is rotated in the second direction about the predetermined axis and a case where it is determined that the operation device is swung in the downward direction, during a period in which the operation device is in the swing state, on the basis of the operation data.

An information processing method that is executed by a computer, the method comprising:

• acquiring, from an operation device having an inertial sensor, operation data including at least data based on an output of the inertial sensor;
• determining whether or not the operation device is in a swing state in which the operation device is being swung, on the basis of the operation data;
• determining whether the operation device is rotated in a first direction about a predetermined axis of the inertial sensor or a second direction opposite to the first direction, on the basis of the operation data;
• determining whether the operation device is swung in an upward direction or a downward direction, on the basis of the operation data;
• executing first processing in at least either a case where it is determined that the operation device is rotated in the first direction about the predetermined axis or a case where it is determined that the operation device is swung in the upward direction, during a period in which the operation device is in the swing state, on the basis of the operation data;
• and
• executing second processing in at least either a case where it is determined that the operation device is rotated in the second direction about the predetermined axis or a case where it is determined that the operation device is swung in the downward direction, during a period in which the operation device is in the swing state, on the basis of the operation data.

An information processing system comprising:

• an operation device having an inertial sensor;
• and
• an information processing apparatus,
• the operation device being configured to transmit operation data including at least inertial data based on an output of the inertial sensor, to the information processing apparatus,
• the information processing apparatus being configured to:
• acquire the operation data from the operation device;
• determine whether or not the operation device is in a swing state in which the operation device is being swung, on the basis of the operation data;
• determine whether the operation device is rotated in a first direction about a predetermined axis of the inertial sensor or a second direction opposite to the first direction, on the basis of the operation data;
• determine whether the operation device is swung in an upward direction or a downward direction, on the basis of the operation data;
• execute first processing in at least a case where it is determined that the operation device is rotated in the first direction about the predetermined axis and a case where it is determined that the operation device is swung in the upward direction, during a period in which the operation device is in the swing state, on the basis of the operation data;
• and
• execute second processing in at least a case where it is determined that the operation device is rotated in the second direction about the predetermined axis and a case where it is determined that the operation device is swung in the downward direction, during a period in which the operation device is in the swing state, on the basis of the operation data.