
4
Basic visualization
In this chapter the mathematical principles of chapter 2 and the structures of
chapter 3 come together to produce a collection of algorithms that are used to
synthesize images from purely numerical d ata so that th e viewer should instantly
be able to exclaim “That’s a . . . !” This synthesis is termed rendering, and
from the scientific p oint of view this is a mathematical modeling process of the
way light interacts with surfaces, how light travels to the observer’s location and
how they perceive it.
In the decade or so since publication of the first edition of this book the
major mathematical models used in the rendering process ...