=========================
  Parametric 4D Grapher
=========================
by TICalc Arts


==================================================================================
INTRODUCTION:
==================================================================================
This is the first and only parametric 4D graphing program for TI calculators that
has more than one mode. This program will allow you to plot 4D graphs using
Cartesian, Cylindrical, and Spherical coordinates.

And yes, I say "4D" because time is the 4th dimension and it is represented here
in glorious color!


==================================================================================
PLOTTING:
==================================================================================
When you run PARAM4D, you will be at the MODE select screen. Select a mode by
using the [F1]-[F3] keys. If a previous plot is available, the current equation
will be shown and you may press [F5] to plot it.

The 3 modes available are:
F1: Cartesian: X|Y|Z(T)
F2: Cylindrical: Z|R|theta(T)
F3: Spherical: R|theta|phi(T)

After selecting a mode, you can edit the current equation and window. Press the
arrow keys to select which window parameter you would like to change and press
[ENTER]. From there, you can enter the value you want. Once you have the window
settings you want, you can press [F5] to plot the current equation.

Note: If you change modes, the default equation and window settings will be reset.

Here are some example equations you can try using the default parameters.
Note: Trig mode is auto-set to DEG.

Cartesian:
----------
X(T)=10cos(360T/pi
Y(T)=10sin(360T/pi
Z(T)=T^2/10

Cylindrical:
------------
Z(T)=5sin(6T
R(T)=10
theta(T)=T

Z(T)=(T-180)/36
R(T)=5sin(T
theta(T)=6T

Spherical:
----------
R(T)=10
theta(T)=T
phi(t)=45sin(6T

R(T)=10
theta(T)=T+30cos(6T
phi(t)=30sin(6T

R(T)=10
theta(T)=6T
phi(t)=(T-180)/2


==================================================================================
VIEWING:
==================================================================================
Note that X and Y are horizontal and vertical, respectively. Z is in and out of
the screen.

Arrows	= Rotate graph 15 degrees
8/2,4/6 = Rotate graph 90 degrees
[MODE]	= Toggle Wire/Dots
[ALPHA]	= Toggle Depth Perspective On/Off
[XT0n]  = Bounding box On/Off
[STAT]  = Axes On/Off
[VARS]  = Change color scheme
[+]/[-] = Zoom In/Out
[ENTER] = Reset Zoom
[TRACE]	= Trace mode
[CLEAR]	= Quit


==================================================================================
TRACING:
==================================================================================
When you enter TRACE mode, the equation will be displayed at the top of the screen
along with the values for each point selected. Press the arrow keys to select
different points in the plot. Press [ENTER] or [CLEAR] to exit trace mode.


==================================================================================
VERSION HISTORY:
==================================================================================
Ver:	2.0
Date:	5/15/2026
Notes:	Revised menu system and added axes and bounding box.
	Added TI-84 Evo version.

Ver:	1.1
Date:	12/15/2024
Notes:	Changed colors to be based on T instead of Z.
	Optimized some color schemes and added a "cool" scheme.
	Some memory optimizations.
	Fixed this Readme.txt for various errors.

Ver:	1.0
Date:	12/26/2023
Notes:	Initial version for public release.


==================================================================================
CONTACT:
==================================================================================
ticalcarts@gmail.com
