Texas Instruments TI-89 사용자 설명서
3D Graphing
390
Note:
During rotation, the axes expand or contract to fit the screen’s width and height.
This causes some distortion as shown in the example.
z1(x,y)=(x
3
y–y
3
x) / 390
In this example,
eye
q
=20 and eye
f
=70
eye
ψ
= 0
eye
ψ
= 45
eye
ψ
= 90
When
eye
ψ
=0
, the z axis runs the height of
the screen.
When
eye
ψ
=90
, the z axis runs the width of
the screen.
z=10
z=
ë
10
z=10
z=
ë
10