Patent ID: 7880726

Claim:
A three-dimensional pointing method, comprising: pointing at a desired point in a virtual three-dimensional space represented on a display apparatus based on two-dimensional coordinates on a predetermined detection plane of the display apparatus of a position that is pointed at by a pen tip of an input pen in a real three-dimensional space, pen pressure that is pressure applied to the pen tip of the input pen, an inclination angle that is an angle between an axis of the input pen and the detection plane in the real three-dimensional space, and a direction angle that is an angle between a projection of the axis of the input pen onto the detection plane and a predetermined line on the detection plane; generating an extension of the axis of the input pen in the real three-dimensional space in the virtual three-dimensional space, based on the inclination angle and the direction angle of the input pen in the real three-dimensional space, by extending the axis of the input pen from the real three-dimensional space into the virtual three-dimensional space; displaying a three-dimensional pointer on the display apparatus on the extension of the axis of the input pen into the virtual three-dimensional space; and changing a coordinate of the three-dimensional pointer in the direction of the extension into the virtual three-dimensional space according to the pen pressure of the input pen, and displaying the three-dimensional pointer on the display apparatus based on the changed coordinate.