Texas Instruments TI-89 Titanium User Manual

3D Graphing 374
Effect of Changing eyeq theta
The view on the Graph screen is always oriented along the viewing angle. From this
point of view, you can change
eyeq to rotate the viewing angle around the z axis.
Note: This example increments eyeq by 30.
z1(x,y) = (x
3
y – y
3
x) / 390
In this example eyef =
70
eye
q = 20
eye
q = 50
eye
q = 80

Texas Instruments TI-89 Titanium Specifications

General

Display Type	LCD
Display Resolution	160 x 100 pixels
CPU	Motorola 68000
CPU Speed	16 MHz
RAM	256 KB
Flash ROM	2.7 MB
Programming Language	TI-BASIC, Assembly
Power Source	4 AAA batteries
Connectivity	I/O port
Dimensions	7.5 x 3.5 x 1 inches