Input device for a computer, has automatic switching between modes of 3D and 2D operation, and its interaction process with a display screen

Computer Input Device, has automatic switching between 3D and 2D modes of operation, and its method of interaction with a screen display.A housing (10) containing an electromagnetic sensor (16) of tracker type is equipped with a contactor (22) on a face (12) designed to be placed on a flat support. The contactor (22) makes it possible to automatically switch the device a 3D operating mode to a 2D mode of operation, when it is placed on a flat support, and inversely when it is lifted from the support.