<s>
Guard	B-Algorithm
band	I-Algorithm
clipping	I-Algorithm
is	O
a	O
technique	O
used	O
by	O
digital	O
rendering	O
hardware	O
and	O
software	O
designed	O
to	O
minimize	O
the	O
amount	O
of	O
clipping	B-Algorithm
performed	O
.	O
</s>
<s>
Instead	O
of	O
clipping	B-Algorithm
polygons	O
that	O
extend	O
out	O
of	O
the	O
viewport	O
,	O
polygons	O
are	O
only	O
clipped	O
if	O
they	O
extend	O
past	O
a	O
guard	O
band	O
.	O
</s>
<s>
Clipping	B-Algorithm
is	O
still	O
needed	O
to	O
prevent	O
integer	B-Error_Name
overflow	I-Error_Name
in	O
the	O
rasterizer	O
.	O
</s>
<s>
The	O
guard	O
band	O
is	O
typically	O
designed	O
to	O
be	O
several	O
orders	O
of	O
magnitude	O
greater	O
than	O
the	O
screen	O
resolution	O
,	O
as	O
clipping	B-Algorithm
is	O
an	O
exception	O
that	O
creates	O
a	O
pipeline	B-General_Concept
bubble	I-General_Concept
and	O
creates	O
additional	O
triangles	O
to	O
be	O
processed	O
.	O
</s>
