Patent ID: 8704759
Filing Date: 2014-04-22
Classification: A63F,G06F

Abstract:
1. A coordinate calculation apparatus for calculating a coordinate point representing a position on a display screen based on an orientation of an input device, the apparatus comprising: a direction acquisition unit configured to acquire information representing a direction of the input device viewed from a predetermined position in a predetermined space; an orientation calculation unit configured to calculate the orientation of the input device in the predetermined space; a first coordinate calculation unit configured to calculate a first coordinate point for determining the position on the display screen based on the orientation of the input device; a correction unit configured to correct the first coordinate point such that the first coordinate point calculated when the input device is directed in a predetermined direction takes a predetermined reference value; and a position calculation unit configured for calculating a coordinate point representing the position on the display screen based on the first coordinate point corrected by the correction unit, wherein the first coordinate calculation unit calculates as the first coordinate point a coordinate point representing an intersectional position between a line extending from a predetermined reference point toward a direction of a vector indicating the orientation of the input device and a predetermined plane, the correction unit corrects the first coordinate point by dislocating a coordinate system for the first coordinate point such that the first coordinate point calculated when the input device is directed in the predetermined direction takes the predetermined reference value.