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How the Viewing Angle Is Measured
How the Viewing Angle Is Measured
How the Viewing Angle Is Measured
How the Viewing Angle Is Measured
The viewing angle has three components:
•
q — angle in degrees from the
eye
positive x axis.
•
f — angle in degrees from the
eye
positive z axis.
•
— angle in degrees by which the
eye
graph is rotated counter-clockwise
around the line of sight set by
and
eye
f.
When
Note:
eye =0
rotated 90¡ counterclockwise and is horizontal.
In the Window Editor (8 $), always enter
regardless of the current angle mode.
3D Graphing
eye
, the z axis is vertical on the screen. When
eye
eye
X
q
Do not enter a
example, type 20, 70, and
0, not 20
, 70
¡
eye
q,
eye
Z
f
Y
eye
q
¡
symbol. For
and 0
.
¡
¡
, the z axis is
eye =90
f, and
in degrees,
eye
386
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