<s>
Irrlicht	O
(	O
pronounced	O
in	O
German	O
)	O
is	O
an	O
open-source	B-Application
game	O
engine	O
written	O
in	O
C++	B-Language
.	O
</s>
<s>
It	O
is	O
cross-platform	B-Operating_System
,	O
officially	O
running	O
on	O
Windows	B-Application
,	O
macOS	B-Application
,	O
Linux	B-Application
and	O
Windows	B-Operating_System
CE	I-Operating_System
and	O
due	O
to	O
its	O
open	O
nature	O
ports	O
to	O
other	O
systems	O
are	O
available	O
,	O
including	O
FreeBSD	B-Operating_System
,	O
Xbox	B-Application
(	O
up	O
to	O
Irrlicht	O
version	O
1.8.1	O
)	O
,	O
PlayStation	B-Operating_System
Portable	I-Operating_System
,	O
Symbian	B-Operating_System
,	O
iPhone	B-Device
,	O
AmigaOS	B-Application
4	I-Application
,	O
Sailfish	O
OS	O
via	O
a	O
QT/Qml	O
wrapper	O
,	O
and	O
Google	B-Application
Native	I-Application
Client	I-Application
.	O
</s>
<s>
Unofficial	O
bindings	O
for	O
many	O
languages	O
exist	O
including	O
AutoIt	B-Language
,	O
C++Builder	B-Language
,	O
FreeBASIC	B-Language
,	O
GameMaker	B-Operating_System
Language	I-Operating_System
,	O
Java	B-Language
,	O
Lua	B-Language
,	O
.NET	B-Application
,	O
Object	B-Language
Pascal	I-Language
(	O
Delphi	B-Language
)	O
,	O
Perl	B-Language
,	O
Python	B-Language
,	O
and	O
Ruby	B-Language
,	O
though	O
most	O
of	O
them	O
have	O
not	O
been	O
maintained	O
for	O
five	O
years	O
or	O
more	O
.	O
</s>
<s>
Irrlicht	O
supports	O
3D	O
rendering	O
via	O
OpenGL	B-Application
,	O
DirectX	B-Application
8	I-Application
,	O
9	O
and	O
internal	O
software	O
rasterizers	O
.	O
</s>
<s>
DirectX	B-Application
8	I-Application
will	O
not	O
be	O
supported	O
after	O
1.8.1	O
,	O
effectively	O
ending	O
support	O
for	O
Xbox	B-Application
.	O
</s>
<s>
External	O
renderers	O
and	O
windowing	O
systems	O
plug	O
in	O
through	O
simple	O
interfaces	O
,	O
giving	O
rise	O
to	O
a	O
community-made	O
Simple	B-Operating_System
DirectMedia	I-Operating_System
Layer	I-Operating_System
(	O
SDL	O
)	O
video	O
driver	O
and	O
support	O
for	O
iPhone	B-Device
and	O
Symbian	B-Operating_System
devices	O
.	O
</s>
<s>
In	O
addition	O
to	O
legacy	O
fixed-function	O
pipeline	O
materials	O
,	O
programmable	O
Pixel	O
and	O
Vertex	O
Shaders	O
(	O
1.1	O
to	O
3.0	O
and	O
4.0	O
using	O
GLSL	B-Language
)	O
,	O
ARB	O
Fragment	O
and	O
Vertex	O
Programs	O
,	O
HLSL	B-Language
,	O
Cg	B-Language
and	O
GLSL	B-Language
materials	O
are	O
supported	O
.	O
</s>
<s>
It	O
will	O
load	O
and	O
display	O
3ds	O
Max	O
files	O
,	O
Quake	O
2	O
MD2	O
Models	O
,	O
Wavefront	O
.obj	O
objects	O
,	O
Quake	O
3	O
.bsp	O
maps	O
,	O
Milkshape3D	O
objects	O
,	O
and	O
DirectX	B-Application
.x	O
files	O
.	O
</s>
<s>
Lights	O
,	O
cameras	O
and	O
3D	O
objects	O
are	O
managed	O
as	O
a	O
tree	O
of	O
Scene	O
Nodes	O
,	O
arbitrary	O
groupable	O
entities	O
linked	O
together	O
in	O
a	O
scene	B-Data_Structure
graph	I-Data_Structure
.	O
</s>
<s>
A	O
skinnable	B-Application
2D	O
graphical	B-Application
user	I-Application
interface	I-Application
(	O
GUI	B-Application
)	O
is	O
available	O
,	O
supporting	O
many	O
controls	O
and	O
the	O
ability	O
for	O
users	O
to	O
plug	O
in	O
their	O
own	O
(	O
or	O
community	O
made	O
)	O
custom	O
widgets	O
at	O
runtime	O
.	O
</s>
<s>
Irrlicht	O
's	O
internal	O
event	O
system	O
provides	O
mouse	O
,	O
keyboard	O
,	O
joystick	O
and	O
GUI	B-Application
events	O
without	O
having	O
to	O
rely	O
on	O
additional	O
libraries	O
.	O
</s>
<s>
Filesystem	O
access	O
is	O
abstracted	O
allowing	O
platform-independent	B-Operating_System
file	O
and	O
folder	O
access	O
,	O
and	O
transparent	O
access	O
to	O
files	O
within	O
ZIP	B-General_Concept
archives	I-General_Concept
.	O
</s>
<s>
Irrlicht	O
was	O
designed	O
to	O
be	O
able	O
to	O
load	O
and	O
save	O
the	O
current	O
scene	O
to	O
an	O
XML	O
file	O
;	O
this	O
combined	O
with	O
the	O
engine	O
's	O
open-source	B-Application
licensing	O
model	O
has	O
attracted	O
various	O
programmers	O
and	O
developers	O
to	O
create	O
world	O
editors	O
for	O
Irrlicht	O
to	O
simplify	O
the	O
world-creation	O
process	O
.	O
</s>
<s>
One	O
such	O
example	O
is	O
the	O
irrEdit	B-Application
world	O
editor	O
,	O
developed	O
by	O
Nikolaus	O
Gebhardt	O
and	O
other	O
members	O
of	O
the	O
company	O
Ambiera	O
.	O
</s>
<s>
IrrEdit	B-Application
contains	O
a	O
radiosity	O
lightmap	B-Data_Structure
generator	O
and	O
a	O
scripting	O
interface	O
using	O
Squirrel	B-Language
scripts	O
.	O
</s>
<s>
Being	O
developed	O
by	O
the	O
same	O
group	O
,	O
irrEdit	B-Application
supports	O
the	O
use	O
of	O
sounds	O
in	O
levels	O
made	O
by	O
irrEdit	B-Application
for	O
use	O
with	O
irrKlang-enabled	O
compiled	O
DLLs	O
.	O
</s>
<s>
Many	O
physics	O
libraries	O
have	O
had	O
plugins	O
and	O
wrappers	O
written	O
for	O
Irrlicht	O
,	O
including	O
Nvidia	B-Operating_System
PhysX	I-Operating_System
,	O
Bullet	B-Application
,	O
and	O
Open	B-Application
Dynamics	I-Application
Engine	I-Application
.	O
</s>
<s>
Many	O
users	O
contribute	O
extensions	O
such	O
as	O
Compute	O
Shaders	O
(	O
OpenGL	B-Application
4.3	O
)	O
and	O
Tessellation	O
Shaders	O
(	O
Shader	B-Language
Model	I-Language
5.0	O
)	O
.	O
</s>
<s>
Bugsnax	B-Application
,	O
a	O
monster	O
collection	O
adventure	O
game	O
.	O
</s>
<s>
Schwarzerblitz	O
,	O
a	O
3-D	O
fighting	O
game	O
released	O
in	O
2019	O
for	O
Windows	B-Application
PC	I-Application
.	O
</s>
<s>
Tetris	B-Application
(	O
iOS	B-Application
version	O
)	O
,	O
a	O
Tetris	B-Application
game	O
from	O
EA	O
Mobile	O
.	O
</s>
