
12 Chapter 2 The Graphics System
X = E + dD + uU + rR
X = E + dD + uU + rR
U
U
E
E
R
R
E + dD + uU
E + dD + uU
E + dD
E + dD
D
D
P
(a) (b)
Figure 2.2 (a) A geometric illustration of the right-handed coordinate system in Equation (2.1).
(b) A geometric illustration of the left-handed coordinate system in Equation (2.5).
Both the algebraic interpretation and the geometric interpretation are founded on
the standard Cartesian coordinate system.
A point X is represented in the coordinate system of Equation (2.1) via Equa-
tion (2.2), where the components of the coordinate tuple (d , u, r) are computed by
Equation (2.3). Instead, I could have used the coordinate system ...