3D Graphing 377
As the z axis rotates 90¡, its range (L10 to 10 in this example) expands to almost twice its
original length. Likewise, the x and y axes expand or contract.
From the Home Screen or a Program
The
eye values are stored in the system variables eyeq, eyef, and eyeψ. You can access
or store to these variables as necessary.
Animating a 3D Graph Interactively
After plotting any 3D graph, you can change the viewing angle interactively by using the
cursor.
The Viewing Orbit
When using A and B to animate a graph, think of it as moving the viewing angle along
its “viewing orbit” around the graph.
@ To type f or ψ, press 8 c j [
F] or 8 c Ú, respectively.
You can also press 2G and use the Greek menu.
Moving along this orbit can
cause the z axis to wobble
slightly during the animation.
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