As we shall describe in the next chapter, an intention generator in the artificial fish's brain generates an intention of what to do next at each animation time step. The functioning of the focusser is controlled by the time-varying intention of the fish. When the intention is to avoid collision, the focusser is activated to locate the position of the most dangerous obstacle, usually the closest, among all the dangerous obstacles perceived (we will explain the determination of dangerous obstacles in the next section). The focusser passes only the position of the most dangerous obstacle to the behavior system. Likewise, when the intention of a male fish is to mate, the focusser targets the most desirable female fish; when the intention is to escape from predators, only the detailed information about the most threatening predator gets passed through the focusser.
|Xiaoyuan Tu||January 1996|