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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 eyef=70
eyeψ = 0
eye
ψ = 45
eye
ψ = 90
When eyeψ=0, the z axis runs the height of
the screen.
When
eyeψ=90, the z axis runs the width of
the screen.
z=10
z=
ë10
z=10
z=
ë10