Game Development Reference
In-Depth Information
Figure 10.22
Range values using the inverse of a square are greater than zero.
graph that results is symmetrical with respect to the origin of the Cartesian plane.
Figure 10.23 illustrates how this is so. As with other graphs of inverse values,
these also exclude 0.
Varieties of Translation
Translating the curves generated by equations with exponents entails performing
operations similar to those you perform with linear equations. On one basic
level, translation involves moving the vertex of a parabola along the
y
axis. To
move a vertex along the
y
axis, you first consider the position of a parabola with
its vertex resting on the origin of the Cartesian plane. You can then add values to
this position to shift it up or down the
y
axis.
