Game Development Reference
In-Depth Information
1
y
1
1
(0,0)
x
Figure 11.1 A standard
two-dimensional Cartesian
coordinate system, or x-y axis.
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1
1
1
(0,0)
x
Flash stage
Figure 11.2 Flash ' s vertically
inverted coordinate system.
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y
You have probably heard of the three most common trig func-
tions: sine (sin), cosine (cos), and tangent (tan). They each relate
to different sides of a triangle. The longest side of the triangle (and
in a right triangle, the side opposite the right angle) is the hypote-
nuse (hyp). In Fig. 11.3 ,werelatetotheothertwosidesofthe
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