3D Graphing 389
Effect of Changing eye
Effect of Changing eyeEffect of Changing eye
Effect of Changing eyef phi
phi phi
phi
By changing eyef, you can elevate your viewing angle above the xy plane. If 90 < eyef <
270, the viewing angle is below the xy plane.
Note: This example starts on the xy plane (eyef = 90) and decrements eyef by20 to
elevate the viewing angle.
Effect of Changing eye
Effect of Changing eyeEffect of Changing eye
Effect of Changing eyeψ psi
psi psi
psi
The view on the Graph screen is always oriented along the viewing angles set by eyeq
and eyef. You can change eyeψ to rotate the graph around that line of sight.
z1(x,y) = (x3y – y3x) / 390 In this example eyeq =
20
eyef = 90
eyef = 70
eyef = 50