
Manual motor interfaces 133
Figure 7.10 Functional model of DigiHaptic
Figure 7.11 DigiHaptic with its three joysticks, motors and potentiometers
Thumb
Index finger
Ring finger
Ring finger
Thumb
Index finger
Figure 7.12 Correspondence between the movement of fingers and movement of objects for the 3D
rotations and translations
The joysticks have been placed in such as way as to respect the ergonomics of
the hand and the natural movements of the fingers when the hand is placed in the
peripheral area. Moreover, the movement of the 3D objects on the screen corresponds
to the orientation and movement of the fingers. Actually, each joystick controls a degree