Texas Instruments PLUS TI-89 - Manual (Page 236)

Chapter 12: Additional Graphing Topics 219
12ADDLGR.DOC TI-89/TI-92 Plus: Additional Graphing Tools (English) Susan Gullord Revised: 02/23/01 1:03 PM Printed: 02/23/01 2:15 PM Page 219 of 20
Before using CyclePic , you must have a series of graph pictures that
have the same base name and are sequentially numbered starting
with 1 (such as
pic1, pic2, pic3, . . . ).
To cycle the pictures, use the syntax:
CyclePic picNameString , n [, wait ] [, cycles ] [, direction ]
This example program (named cyc ) generates 10 views of a 3D
graph, with each view rotated 10 ¡ further around the Z axis. For
information about each command, refer to Appendix A. For
information about using the Program Editor, refer to Chapter 17.
Program Listing Every Other Graph from Program
:cyc()
:Prgm
:local i
:
¦ Set mode and Window variables
:setMode(“graph”,”3d”)
:70! eye
f
:ë 10! xmin
:10! xmax
:14! xgrid
:ë 10! ymin
:10! ymax
:14! ygrid
:ë 10! zmin
:10! zmax
:1! zscl
:
¦ Define the function
:(x^3ù yì y^3ù x)/390! z1(x,y)
:
¦ Generate pics and rotate
:For i,1,10,1
: iù 10! eye
q
: DispG
: StoPic #("pic" & string(i))
:EndFor
:
¦ Display animation
:CyclePic "pic",10,.5,5,ë 1
:EndPrgm
After entering this program on the Program Editor, go to the Home
screen and enter
cyc() .
Animating a Series of Graph Pictures
As described earlier in this chapter, you can save a picture of
a graph. By using the CyclePic command, you can flip
through a series of graph pictures to create an animation.
CyclePic Command
Example
Note: Due to its complexity,
this program takes several
minutes to run.
# of times to repeat cycle
1 = forward/circular cycle
ë 1= forward/backward
seconds between pictures
# of pictures to cycle
base name of pictures in quotes, such as "pic"
For #, press TI - 89: ½
TI - 92 Plus: 2½
and select it from the list.
For &, press:
TI
- 89: ¥ p
TI - 92 Plus: 2 H
For f , press:
TI - 89: ¥ c j F
TI - 92 Plus: ¥ G F
Comments start with ¦ .
Press:
TI
- 89: ¥ d
TI - 92 Plus: 2 X