Game Development Reference
In-Depth Information
Figure 10.21
Graphs of the inverse values of the domain are undefined at 0.
For the inverses of domain values you define using exponents, the appearance
of the graph that results depends on whether the exponent is even or odd.
Figure 10.22 illustrates the graph of the inverse of a square. The domain values
are all greater than 0 and symmetrical with respect to the
y
axis.
To implement the equation shown in Figure 10.22, begin with the equation you
create for Figure 10.21. Click the Power menu item. To position the exponent,
click to the upper right of the x field. Then type 2 in the exponent field. Click the
Chart for Formula 1 button to refresh the graph.
Inverse squares generate graphs that are symmetrical to the
y
axis. Inverses of all
domain values with even-numbered exponents are likewise symmetrical with
respect to the
y
axis. With odd-numbered exponents, the situation changes. The
