Najedź na biały punkt i powiększ obraz (kręć w górę kólkiem na myszy).
Przekonaj się jak wiele zależy od skali i punktu widzenia.

A = Intersect(yAxis, xAxis)
a = Sphere(A, 1)
b = Sphere(A, 2)
c = Sphere(A, 3)
B = PointIn(a)
C = PointIn(a)
D = PointIn(a)
E = PointIn(a)
F = PointIn(a)
G = PointIn(a)
H = PointIn(a)
I = PointIn(a)
J = PointIn(a)
K = PointIn(a)
L = PointIn(a)
M = PointIn(a)
N = Point(xAxis)
O = Point(zAxis)
P = Point(zAxis)
Q = Point(xAxis)
R = PointIn(a)
S = PointIn(a)
T = PointIn(a)
U = PointIn(a)
V = PointIn(a)
W = PointIn(a)
Z = Point(xAxis)
A_1 = PointIn(a)
B_1 = PointIn(a)
C_1 = PointIn(a)
D_1 = PointIn(a)
E_1 = PointIn(a)
F_1 = PointIn(a)
G_1 = PointIn(a)
H_1 = PointIn(a)
I_1 = PointIn(a)
J_1 = PointIn(a)
K_1 = PointIn(a)
L_1 = PointIn(a)
M_1 = PointIn(a)
N_1 = PointIn(a)
O_1 = PointIn(a)
P_1 = PointIn(a)
Q_1 = PointIn(a)
R_1 = PointIn(a)
S_1 = Point(xAxis)
T_1 = PointIn(a)
U_1 = PointIn(a)
V_1 = PointIn(a)
W_1 = Point(yAxis)
Z_1 = PointIn(a)
A_2 = PointIn(a)
B_2 = PointIn(a)
C_2 = PointIn(a)
D_2 = PointIn(a)
E_2 = PointIn(a)
F_2 = PointIn(a)
G_2 = PointIn(a)
H_2 = PointIn(a)
I_2 = PointIn(a)
J_2 = PointIn(a)
K_2 = PointIn(a)
L_2 = PointIn(a)
M_2 = PointIn(a)
N_2 = PointIn(b)
O_2 = PointIn(b)
P_2 = PointIn(b)
Q_2 = PointIn(b)
R_2 = PointIn(b)
S_2 = PointIn(b)
T_2 = PointIn(b)
U_2 = PointIn(b)
V_2 = PointIn(b)
W_2 = PointIn(b)
Z_2 = PointIn(b)
A_3 = PointIn(b)
B_3 = PointIn(b)
C_3 = PointIn(b)
D_3 = PointIn(b)
E_3 = PointIn(b)
F_3 = PointIn(b)
G_3 = PointIn(b)
H_3 = PointIn(b)
I_3 = PointIn(b)
J_3 = PointIn(b)
K_3 = PointIn(b)
L_3 = PointIn(b)
M_3 = PointIn(b)
N_3 = PointIn(b)
O_3 = PointIn(b)
P_3 = PointIn(b)
Q_3 = PointIn(b)
R_3 = PointIn(b)
S_3 = PointIn(b)
T_3 = PointIn(b)
U_3 = PointIn(b)
V_3 = PointIn(b)
W_3 = PointIn(b)
Z_3 = PointIn(b)
A_4 = PointIn(b)
B_4 = PointIn(b)
C_4 = PointIn(b)
D_4 = PointIn(b)
E_4 = PointIn(b)
F_4 = PointIn(b)
G_4 = PointIn(b)
H_4 = PointIn(b)
I_4 = PointIn(b)
J_4 = PointIn(b)
K_4 = PointIn(b)
L_4 = PointIn(b)
M_4 = PointIn(b)
N_4 = Point(xAxis)
O_4 = PointIn(b)
P_4 = PointIn(b)
Q_4 = PointIn(b)
R_4 = PointIn(b)
S_4 = PointIn(b)
T_4 = PointIn(b)
U_4 = PointIn(b)
V_4 = PointIn(b)
W_4 = PointIn(b)
Z_4 = PointIn(b)
A_5 = PointIn(b)
B_5 = PointIn(b)
C_5 = PointIn(b)
D_5 = PointIn(b)
E_5 = PointIn(b)
F_5 = PointIn(b)
G_5 = PointIn(b)
H_5 = PointIn(b)
I_5 = PointIn(b)
J_5 = PointIn(b)
K_5 = PointIn(b)
L_5 = PointIn(b)
M_5 = PointIn(b)
N_5 = PointIn(b)
O_5 = PointIn(b)
P_5 = PointIn(b)
Q_5 = PointIn(b)
R_5 = PointIn(b)
S_5 = PointIn(b)
T_5 = PointIn(b)
U_5 = PointIn(b)
V_5 = PointIn(b)
W_5 = PointIn(b)
Z_5 = PointIn(b)
A_6 = PointIn(b)
B_6 = PointIn(b)
C_6 = PointIn(b)
D_6 = PointIn(b)
E_6 = PointIn(b)
F_6 = PointIn(b)
G_6 = PointIn(b)
H_6 = PointIn(b)
I_6 = PointIn(b)
J_6 = PointIn(b)
K_6 = PointIn(b)
L_6 = PointIn(b)
M_6 = PointIn(b)
N_6 = PointIn(b)
O_6 = PointIn(b)
P_6 = PointIn(b)
Q_6 = PointIn(b)
R_6 = PointIn(b)
S_6 = PointIn(b)
T_6 = PointIn(b)
U_6 = PointIn(b)
V_6 = PointIn(b)
W_6 = PointIn(b)
Z_6 = PointIn(b)
A_7 = PointIn(b)
B_7 = PointIn(b)
C_7 = PointIn(b)
D_7 = PointIn(b)
E_7 = PointIn(b)
F_7 = PointIn(b)
G_7 = PointIn(b)
H_7 = PointIn(b)
I_7 = PointIn(b)
J_7 = PointIn(b)
K_7 = PointIn(b)
L_7 = PointIn(b)
M_7 = PointIn(b)
N_7 = PointIn(b)
O_7 = PointIn(b)
P_7 = PointIn(b)
Q_7 = PointIn(b)
R_7 = PointIn(b)
S_7 = PointIn(b)
T_7 = PointIn(b)
U_7 = PointIn(b)
V_7 = PointIn(b)
W_7 = PointIn(b)
Z_7 = PointIn(b)
A_8 = PointIn(b)
B_8 = PointIn(b)
C_8 = PointIn(b)
D_8 = PointIn(b)
E_8 = PointIn(b)
F_8 = PointIn(b)
G_8 = PointIn(b)
H_8 = PointIn(b)
I_8 = PointIn(b)
J_8 = PointIn(b)
K_8 = PointIn(b)
L_8 = PointIn(b)
M_8 = PointIn(b)
N_8 = PointIn(b)
O_8 = PointIn(b)
P_8 = PointIn(b)
Q_8 = PointIn(b)
R_8 = PointIn(b)
S_8 = PointIn(b)
T_8 = PointIn(b)
U_8 = PointIn(b)
V_8 = PointIn(b)
W_8 = PointIn(b)
Z_8 = PointIn(b)
A_9 = PointIn(b)
B_9 = PointIn(b)
C_9 = PointIn(c)
D_9 = PointIn(c)
E_9 = PointIn(c)
F_9 = PointIn(c)
G_9 = PointIn(c)
H_9 = PointIn(c)
I_9 = PointIn(c)
J_9 = PointIn(c)
K_9 = PointIn(c)
L_9 = PointIn(c)
M_9 = Point(zAxis)
N_9 = PointIn(c)
O_9 = PointIn(c)
P_9 = PointIn(c)
Q_9 = PointIn(c)
R_9 = PointIn(c)
S_9 = PointIn(c)
T_9 = PointIn(c)
U_9 = PointIn(c)
V_9 = PointIn(c)
W_9 = PointIn(c)
Z_9 = PointIn(c)
A_{10} = PointIn(c)
B_{10} = PointIn(c)
C_{10} = PointIn(c)
D_{10} = PointIn(c)
E_{10} = PointIn(c)
F_{10} = PointIn(c)
G_{10} = PointIn(c)
H_{10} = PointIn(c)
I_{10} = PointIn(c)
J_{10} = PointIn(c)
K_{10} = PointIn(c)
L_{10} = PointIn(c)
M_{10} = Point(yAxis)
N_{10} = PointIn(c)
O_{10} = PointIn(c)
P_{10} = PointIn(c)
Q_{10} = PointIn(c)
R_{10} = PointIn(c)
S_{10} = PointIn(c)
T_{10} = PointIn(c)
U_{10} = PointIn(c)
V_{10} = PointIn(c)
W_{10} = PointIn(c)
Z_{10} = PointIn(c)
A_{11} = PointIn(c)
B_{11} = PointIn(c)
C_{11} = PointIn(c)
D_{11} = Point(zAxis)
E_{11} = PointIn(c)
F_{11} = PointIn(c)
G_{11} = PointIn(c)
H_{11} = PointIn(c)
I_{11} = PointIn(c)
J_{11} = PointIn(c)
K_{11} = PointIn(c)
L_{11} = PointIn(c)
M_{11} = PointIn(c)
N_{11} = PointIn(c)
O_{11} = PointIn(c)
P_{11} = PointIn(c)
Q_{11} = PointIn(c)
R_{11} = PointIn(c)
S_{11} = PointIn(c)
T_{11} = PointIn(c)
U_{11} = PointIn(c)
V_{11} = PointIn(c)
W_{11} = PointIn(c)
Z_{11} = PointIn(c)
A_{12} = PointIn(c)
B_{12} = PointIn(c)
C_{12} = PointIn(c)
D_{12} = PointIn(c)
E_{12} = PointIn(c)
F_{12} = PointIn(c)
G_{12} = PointIn(c)
H_{12} = PointIn(c)
I_{12} = PointIn(c)
J_{12} = PointIn(c)
K_{12} = PointIn(c)
L_{12} = PointIn(c)
M_{12} = PointIn(c)
N_{12} = PointIn(c)
O_{12} = PointIn(c)
P_{12} = PointIn(c)
Q_{12} = PointIn(c)
R_{12} = PointIn(c)
S_{12} = PointIn(c)
T_{12} = PointIn(c)
U_{12} = PointIn(c)
V_{12} = PointIn(c)
W_{12} = PointIn(c)
Z_{12} = PointIn(c)
A_{13} = PointIn(c)
B_{13} = PointIn(c)
C_{13} = PointIn(c)
D_{13} = PointIn(c)
E_{13} = PointIn(c)
F_{13} = PointIn(c)
G_{13} = PointIn(c)
H_{13} = PointIn(c)
I_{13} = PointIn(c)
J_{13} = PointIn(c)
K_{13} = PointIn(c)
L_{13} = PointIn(c)
M_{13} = PointIn(c)
N_{13} = PointIn(c)
O_{13} = PointIn(c)
P_{13} = PointIn(c)
Q_{13} = PointIn(c)
R_{13} = PointIn(c)
S_{13} = PointIn(c)
T_{13} = PointIn(c)
U_{13} = PointIn(c)
V_{13} = PointIn(c)
W_{13} = PointIn(c)
Z_{13} = PointIn(c)
A_{14} = PointIn(c)
B_{14} = PointIn(c)