Texas Instruments Titanium TI-89, User Manual

Page: 370 / 977

3D Graphing 367
8
Í
to set
Coordinates = POLAR
.
Tool For 3D Graphs:
Free-Moving
Cursor The free-moving cursor is not available.
„
Zoom
Works essentially the same as it does for function graphs,
but remember that you are now using three dimensions
instead of two.
• Only the following zooms are available:
2:ZoomIn , 3:ZoomOut , 5:ZoomSqr , 6:ZoomStd ,
A:ZoomFit
,
B:Memory
,
C:SetFactors
• Only
x
(
xmin
,
xmax
),
y
(
ymin
,
ymax
), and
z
(
zmin
,
zmax ) Window variables are affected.
• The grid ( xgrid , ygrid ) and eye ( eye q , eye f , eye
ψ
)
Window variables are not affected unless you select
6:ZoomStd
(which resets these variables to their standard
values).
…
Trace
Lets you move the cursor along a grid wire from one grid
point to the next on the 3D surface.
• When you begin a trace, the cursor appears at the
midpoint of the xy grid.
• QuickCenter is available. At any time during a trace,
regardless of the cursor’s location, you can press
¸
to
center the viewing cube on the cursor.
• Cursor movement is restricted in the x and y directions.
You cannot move the cursor beyond the viewing cube
boundaries set by
xmin , xmax , ymin , and ymax .