
282 Virtual Reality: Concepts and Technologies
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