November 2002
Intermediate to advanced
848 pages
19h 59m
English
The Interpolator class extends Behavior that is used in conjunction with an Alpha object to provide animation to the scene graph. We use the term animation to refer to basically non-interactive changes to the scene graph.
The name Interpolator reflects the use of these classes in interpolating between sets of values. We all remember having to interpolate tables and such in math class. This idea is the same. Often, the programmer will specify two values, and the Interpolator will provide a smooth set of values between the pair. Other Interpolators can have a variable number of points called knots to interpolate between.
Note that Interpolators are almost always considered with respect to an Alpha ...