<s>
The	O
Cafu	B-Language
Engine	I-Language
is	O
a	O
game	O
engine	O
developed	O
by	O
Carsten	O
Fuchs	O
.	O
</s>
<s>
It	O
is	O
portable	B-Operating_System
across	I-Operating_System
platforms	I-Operating_System
and	O
runs	O
on	O
Windows	B-Application
and	O
Linux	B-Application
,	O
with	O
plans	O
to	O
be	O
adapted	O
to	O
OS	B-Operating_System
X	I-Operating_System
.	O
</s>
<s>
The	O
engine	O
's	O
source	O
code	O
is	O
freely	B-Application
available	I-Application
under	O
the	O
MIT	B-License
Licence	I-License
.	O
</s>
<s>
In	O
general	O
,	O
Cafu	O
is	O
built	O
with	O
a	O
modular	O
architecture	O
so	O
as	O
to	O
avoid	O
program	O
constructs	O
and	O
libraries	O
that	O
are	O
specific	O
to	O
any	O
given	O
operating	B-General_Concept
system	I-General_Concept
,	O
compiler	B-Language
,	O
CPU	B-Device
or	O
graphics	B-Architecture
processor	I-Architecture
.	O
</s>
<s>
To	O
that	O
end	O
,	O
the	O
Cafu	O
source	O
code	O
compiles	B-Language
both	O
as	O
32	O
-	O
as	O
well	O
as	O
native	O
64-bit	B-Device
software	O
.	O
</s>
<s>
The	O
Cafu	B-Language
Engine	I-Language
abstracts	O
out	O
its	O
handling	O
of	O
materials	O
and	O
instead	O
uses	O
rendering	O
objects	O
,	O
thus	O
enabling	O
users	O
to	O
work	O
with	O
different	O
graphics	O
systems	O
such	O
as	O
OpenGL	B-Application
or	O
DirectX	B-Application
.	O
</s>
<s>
In	O
order	O
to	O
not	O
have	O
to	O
fix	O
details	O
in	O
difficult	O
to	O
modify	O
program	O
code	O
,	O
the	O
Cafu	B-Language
Engine	I-Language
employs	O
scripting	B-Language
based	O
on	O
the	O
programming	O
language	O
Lua	B-Language
in	O
many	O
parts	O
of	O
the	O
program	O
.	O
</s>
<s>
The	O
Cafu	B-Language
Engine	I-Language
's	O
source	O
code	O
has	O
been	O
freely	B-Application
available	I-Application
under	O
the	O
GNU	B-License
GPLv3	I-License
license	I-License
since	O
December	O
2009	O
,	O
while	O
offering	O
the	O
option	O
of	O
a	O
commercial	B-License
license	I-License
upon	O
agreement	O
with	O
Carsten	O
Fuchs	O
Software	O
.	O
</s>
<s>
On	O
June	O
19	O
,	O
2016	O
,	O
the	O
engine	O
changed	O
its	O
open	O
source	O
license	O
from	O
GPLv3	O
to	O
the	B-License
MIT	I-License
License	I-License
.	O
</s>
<s>
The	O
Cafu	B-Language
Engine	I-Language
has	O
been	O
used	O
by	O
the	O
United	O
States	O
Air	O
Force	O
's	O
Research	O
Labs	O
for	O
Human	O
Effectiveness	O
in	O
a	O
study	O
about	O
the	O
visual	O
working	O
memory	O
of	O
pilots	O
.	O
</s>
<s>
The	O
Cafu	B-Language
Engine	I-Language
has	O
been	O
reviewed	O
and	O
presented	O
in	O
these	O
publications	O
:	O
</s>
