STORAGE MEDIUM HAVING INFORMATION PROCESSING PROGRAM STORED THEREON, INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING SYSTEM, AND ATTITUDE CALCULATION METHOD

摘要

An example information processing device calculates an attitude of an input unit having a magnetic sensor. The information processing device repeatedly obtains detected magnetic vectors detected by the magnetic sensor. The information processing device repeatedly estimates a center position of a spherical body having a curved surface which is estimated based on end point positions of the detected magnetic vectors. The attitude of the input unit is calculated based on a direction vector representing a direction from the center position to the end point position of the detected magnetic vector. Each time a detected magnetic vector is obtained, the information processing device updates the center position so that at least some of lengths from the center position to end points of the detected magnetic vectors used for the estimation of the center position are brought closer to an average between the lengths.