<s>
In	O
analytic	O
geometry	O
,	O
a	O
line	O
and	O
a	O
sphere	O
can	O
intersect	B-Algorithm
in	O
three	O
ways	O
:	O
</s>
<s>
Intersection	B-Algorithm
in	O
two	O
points	O
.	O
</s>
<s>
For	O
example	O
,	O
it	O
is	O
a	O
common	O
calculation	O
to	O
perform	O
during	O
ray	B-Algorithm
tracing	I-Algorithm
.	O
</s>
<s>
the	O
line	O
does	O
not	O
intersect	B-Algorithm
the	O
sphere	O
(	O
case	O
1	O
)	O
.	O
</s>
