<s>
Graphics	B-Language
Environment	I-Language
for	I-Language
Multimedia	I-Language
(	O
GEM	O
)	O
is	O
a	O
set	O
of	O
externals	O
(	O
libraries	B-Library
)	O
that	O
provide	O
OpenGL	B-Application
graphics	O
functionality	O
to	O
Pure	B-Language
Data	I-Language
,	O
a	O
graphical	O
programming	O
language	O
for	O
real-time	O
audio	O
processing	O
.	O
</s>
<s>
It	O
is	O
free	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
(	O
GPL	B-License
)	O
.	O
</s>
<s>
The	O
externals	O
provide	O
support	O
for	O
many	O
objects	O
,	O
such	O
as	O
polygon	O
graphics	O
,	O
lighting	O
,	O
texture	O
mapping	O
,	O
image	B-Algorithm
processing	I-Algorithm
,	O
and	O
camera	O
motion	O
.	O
</s>
