3D Graph
(c) Eldar Eran 1996 (t3@netvision.net.il)
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I'll gest well start with the 3D graphic for now.

for the 3d graphic I use 3 programs : P7,P8,P9.
P7 holds the equsion you whant to draw.
P8 the program itself.
P9 if you like it give's you more inhens 3D garphing.

I develop this programs on CFX-9800G but you can run it on
outher computers whithout using color.

SQRT is the sign squrt.
!= meen the sign not Equal.
<= Smaller or equal sign.

P7: half a ball. the original eqution was Z^2+Y^2+X^2=1 ... you need to
isolate Z.
SQRT(1-Y^2-X^2)->Z

P8:
"3D Graph"
30->O            you can change 30 to what ever angle you whant.
(Ymax-Ymin)/10->C
(Xmax-Xmin)/94->D
Plot Ymin(cos O),Ymin(sin O)
Plot Ymax(cos O),Ymax(sin O)
Green Line
Ymin->Y
Lbl 1
0->F
Xmin->X
Lbl 0
Prog 7
ImP Z!=0=>Goto 3
X->A
Y->B
Plot X+Ycos O,Z+Ysin O
F=0=>Goto 2
Line
Lbl 2
1->F
B->Y
A->X
Lbl 3
X+D->X
X<=Xmax=>Goto 0
Ymin->X
Y+C->Y
Y<=Ymax=>Goto 1
Prog 9                 this line and P9 are optional. (personaly I like
using P9)

P9:
"Net"
(Xmax-Xmin)/94*5->D
(Ymax-Ymin)/10->C
Ymin+C->Y
Lbl 1
Xmin->X
Lbl 0
Y-C->Y
Prog 7
Z->W
Y+C->Y
Prog 7
ImP Z!=0=>Goto 2
Imp W!=0=>Goto 2
X->A
Y->B
Plot X+Ycos O,Z+Ysin O
A->X
B->Y
Plot X+(Y-C)cos O,W+(Y-C)sin O
A->X
B->Y
Orange Line
Lbl 2
X+D->X
X<=Xmax=>Goto 0
Y+C->Y
Y<=Ymax=> Goto 1

well.. I gest this is it only some notes

for the equasion that I've put in P7 it is recomde to work with this
range:-2.35,2.35,1,-1.55,1.55,1
becouse I put 30 as an Angle you should work with DEG and not RAD.

enjoy the program thell me if you have any problems.

Eldar Eran
t3@netvision.net.il