Game Development Reference
In-Depth Information
Figure 4.10
A function describes the relation between the domain and the range in which a value in the domain
determines a value in the range.
Figure 4.11 illustrates, once again, the path of a fly. The fly's path does not
constitute a function. In quadrants II and IV, you see that two of the pairs feature
5 as the domain (
x
) value. In quadrants II and III, you see that again, the domain
value repeats itself, this time as
5. Given these redundancies, while it is clear
that relations exist between the values of the domain and the range, the mapping
of the domain to the range does not represent a function.
