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Figure 12.26 Hierarchy in the “Spin Menu''
Figure 12.27 The TULIP menu
at the border between two elements of the ring, even an imperceptible movement is
sufficient to make a bad choice. Hence the idea of screening. It is also necessary to
note that the authors developed the system towards a hierarchical menu (Gerber &
Bechmann, 2005) by piling the hemispheres one on top of the other (Figure 12.26);
TULIP interface (Bowman et al., 2001). TULIP is a menu system using “pinch
gloves''. The menu appears (Figure 12.27), at your finger tips with a command
per finger and a possibility of hierarchisation. It should be noted that this solution
offers graphic selection and a gestural interface at the same time. It is therefore on
the border between these two approaches (see the gestural mode);
C 3 (Grosjean et al., 2001; Grosjean et al., 2002) is another interface for appli-
cation control proposed recently. The Command and Control Cube or C 3 tries
to take advantage of the third dimension mentioned above as a problem. C 3 is
inspired from a circular menu existing on a workstation: Marking Menus. Instead
of bringing this 2D solution directly to 3D, the authors extended the concept to
a third dimension. This involves a menu in the form of a cube sub-divided into
27 sub-cubes, each representing a command (Figure 12.28). The central cubicle
is a cancellation cubicle and the pointer controlled by the hand movements opens
in this cubicle. The user chooses a command by moving his hand and the associ-
ated pointer and then by selecting the corresponding sub-cube. C 3 uses the notion
of selection by orientation rather than by positioning, which was proven to be
more efficient by Kurtenbach and Buxton (1994). C 3 allows performances simi-
lar to “keyboard shortcuts'' using an “expert'' blind mode that is similar to the
gestural mode;
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