<s>
A	O
triangle	B-General_Concept
fan	I-General_Concept
is	O
a	O
primitive	B-Algorithm
in	O
3D	O
computer	O
graphics	O
that	O
saves	O
on	O
storage	O
and	O
processing	O
time	O
.	O
</s>
<s>
It	O
describes	O
a	O
set	O
of	O
connected	O
triangles	O
that	O
share	O
one	O
central	O
vertex	O
(	O
unlike	O
the	O
triangle	O
strip	O
that	O
connects	O
the	O
next	O
vertex	O
point	O
to	O
the	O
last	O
two	O
used	O
vertices	O
to	O
form	O
a	O
triangle	O
)	O
,	O
possibly	O
within	O
a	O
triangle	B-Algorithm
mesh	I-Algorithm
.	O
</s>
<s>
The	O
graphics	B-General_Concept
pipeline	I-General_Concept
can	O
take	O
advantage	O
by	O
only	O
performing	O
the	O
viewing	O
transformations	O
and	O
lighting	O
calculations	O
once	O
per	O
vertex	O
.	O
</s>
<s>
Triangle	B-General_Concept
fans	I-General_Concept
are	O
deprecated	O
in	O
Direct3D10	O
and	O
later	O
.	O
</s>
