created 08/26/97; revised 08/12/00; 07/22/03
CHAPTER 6 — Scaling and Unit Vectors
This chapter discusses how to multiply a
vector by a real number (called scaling),
and how this is used to construct unit vectors.
Unit vectors are used to
show direction in 3D space,
and are essential for 3D graphics.
- Unit vectors.
- Normalizing a vector.
- Variables in vector equations.
Change the elements of this column matrix: (3, 4)T
so that the vector it represents
is twice as long and remains pointing in the same direction.
(Officially you don't know how to do this. Take a guess.)