Game Development Reference
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Figure 12.17 Bicycles
because it does not permit simultaneous control of speed. One of the disadvantages
of the manual solution is the unavailability of one or even both hands to perform
some other task;
Head: some authors (Bourdot et al., 1999) proposed controlling the movements
with the help of headmovements. In this case, the headmovements can be recorded
and retranscribed in the form of movement. Movement control based on head
movements has the disadvantage of not being able to look in a direction differ-
ent than the direction of movement. The head is often used as a supplement to
another mode of control. It makes it possible to control the direction of the eyes
independent of the direction of movement. This solution is compatible with most
techniques described here.
Torso: also, in order to leave the hands and head free for other tasks, some authors
propose controlling movement by orientation of the torso. This solution has the
advantage of using the orientation of the torso that is naturally turned in the
direction of the movement.
Instrumented control
Other instruments can be proposed for controlling movements such as a joystick,
gamepads, or a wand (see chapter 7 on manual motor interfaces) similar to the driving
cabin.
12.4.2.2 Movement of the world in relation to the person
“Grab the air''
Inspired by 2D movement interfaces where the scene is “grabbed'' with the mouse
in order to move it, the “grab the air'' solution (Mapes & Moshell, 1995) consists
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