An information processor that carries out an affine transformation expressed by (1), wherein a matrix (2) that is the product of an affine transformation matrix A by &lgr; (≠ 0) is stored in a memory unit in advance. When coordinates (x, y, z)t are transformed to coordinates (x’, y’, z’)t by affine transformation, A...

The embodiments disclose a method for controlling a user interface that gives instructions to an application on the basis of an operation made by a user on a display on a screen. The method has: a step in which a device to which the screen belongs acquires the display; a step in which at least one feature of the acq...