Game Development Reference
In-Depth Information
D
M ATHEMATICS
A PPENDIX
S UMMARY
look-up for the appropriate formulae and equations needed when implement-
ing physics.
This appendix summarizes the mathematics used in the topic. It serves as a quick
D.1
V ECTORS
Avector a multiplied by a scalar k :
⎦ =
x
y
z
kx
ky
kz
k a
=
k
Vector addition:
a x
a y
a z
b x
b y
b z
a x +
b x
+
=
a
+
b
=
a y
+
b y
a z +
b z
and subtraction:
⎦ −
⎦ =
a x
a x
a y
a z
b x
b y
b z
b x
a
b
=
a y
b y
a z
b z
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