Programming Game AI by Example

Table 10.3

Set Representative Value Confidence

Undesirable 12.5 0.33

Desirable 50 0.2

VeryDesirable 87.5 0.67

Plugging these values into the equation gives the desirability as a crisp

value:

(10.16)

As you can see, this method has produced a value very close to that calcu-

lated by the more accurate but costlier to calculate centroid technique (and

it would have been closer had I not estimated some of the values in the

centroid calculation) and therefore, this is the one I’d advise you use in

your games and applications.

Well, that’s it! We’ve gone from crisp values (distance to target = 200,

ammo status = 8) to fuzzy sets, to inference, and back to a crisp ...