
Chapter
10
Standard Objects
T
he objects described here are common in 3D applications. It is useful to
know how you can represent the objects to manipulate them in an engine or
application.
10.1 Linear Components
Points and vectors, two terms that are not identical in meaning (see Section 2.1.3),
are simple enough to represent and manipulate in a computer program. Objects
that are just as familiar to you are linear components, a general term that refers to
lines, rays, and line seg ments. I will use the term segment rather than carrying around
the modifier “line.” Linear components are useful in picking operations for object
selection. They are also useful ...