<s>
A	O
2D	B-Algorithm
geometric	I-Algorithm
model	I-Algorithm
is	O
a	O
geometric	B-Application
model	I-Application
of	O
an	O
object	O
as	O
a	O
two-dimensional	O
figure	O
,	O
usually	O
on	O
the	O
Euclidean	O
or	O
Cartesian	O
plane	O
.	O
</s>
<s>
Even	O
though	O
all	O
material	O
objects	O
are	O
three-dimensional	O
,	O
a	O
2D	B-Algorithm
geometric	I-Algorithm
model	I-Algorithm
is	O
often	O
adequate	O
for	O
certain	O
flat	O
objects	O
,	O
such	O
as	O
paper	O
cut-outs	O
and	O
machine	O
parts	O
made	O
of	O
sheet	O
metal	O
.	O
</s>
<s>
2D	B-Algorithm
geometric	I-Algorithm
models	I-Algorithm
are	O
also	O
convenient	O
for	O
describing	O
certain	O
types	O
of	O
artificial	O
images	O
,	O
such	O
as	O
technical	O
diagrams	O
,	O
logos	B-Device
,	O
the	O
glyphs	B-Application
of	O
a	O
font	O
,	O
etc	O
.	O
</s>
<s>
They	O
are	O
an	O
essential	O
tool	O
of	O
2D	O
computer	O
graphics	O
and	O
often	O
used	O
as	O
components	O
of	O
3D	O
geometric	B-Application
models	I-Application
,	O
e.g.	O
</s>
<s>
to	O
describe	O
the	O
decals	B-Application
to	O
be	O
applied	O
to	O
a	O
car	O
model	O
.	O
</s>
<s>
Modern	O
architecture	O
practice	O
"	O
digital	O
rendering	O
"	O
which	O
is	O
a	O
technique	O
used	O
to	O
form	O
a	O
perception	O
of	O
a	O
2-D	O
geometric	B-Application
model	I-Application
as	O
of	O
a	O
3-D	O
geometric	B-Application
model	I-Application
designed	O
through	O
descriptive	O
geometry	O
and	O
computerized	O
equipment	O
.	O
</s>
