<s>
SceneKit	B-Application
,	O
sometimes	O
rendered	O
Scene	O
Kit	O
,	O
is	O
a	O
3D	O
graphics	O
application	B-Application
programming	I-Application
interface	I-Application
(	O
API	B-Application
)	O
for	O
Apple	O
Inc	O
.	O
platforms	O
written	O
in	O
Objective-C	B-Language
.	O
</s>
<s>
It	O
is	O
a	O
high-level	O
framework	O
designed	O
to	O
provide	O
an	O
easy-to-use	O
layer	O
over	O
the	O
lower	O
level	O
APIs	B-Application
like	O
OpenGL	B-Application
and	O
Metal	B-Library
.	O
</s>
<s>
SceneKit	B-Application
maintains	O
an	O
object	B-Language
based	I-Language
scene	B-Data_Structure
graph	I-Data_Structure
,	O
along	O
with	O
a	O
physics	O
engine	O
,	O
particle	O
system	O
,	O
and	O
links	O
to	O
Core	B-Operating_System
Animation	I-Operating_System
and	O
other	O
frameworks	O
to	O
easily	O
animate	O
that	O
display	O
.	O
</s>
<s>
SceneKit	B-Application
views	O
can	O
be	O
mixed	O
with	O
other	O
views	O
,	O
for	O
instance	O
,	O
allowing	O
a	O
SpriteKit	O
2D	O
display	O
to	O
be	O
mapped	O
onto	O
the	O
surface	O
of	O
an	O
object	O
in	O
SceneKit	B-Application
,	O
or	O
a	O
UIBezierPath	O
from	O
Core	B-Operating_System
Graphics	I-Operating_System
to	O
define	O
the	O
geometry	O
of	O
a	O
SceneKit	B-Application
object	O
.	O
</s>
<s>
SceneKit	B-Application
also	O
supports	O
import	O
and	O
export	O
of	O
3D	O
scenes	O
using	O
the	O
COLLADA	O
format	O
.	O
</s>
<s>
SceneKit	B-Application
was	O
first	O
released	O
for	O
macOS	B-Application
in	O
2012	O
,	O
and	O
iOS	B-Application
in	O
2014	O
.	O
</s>
<s>
SceneKit	B-Application
maintains	O
a	O
scene	B-Data_Structure
graph	I-Data_Structure
based	O
on	O
a	O
root	O
object	O
,	O
an	O
instance	O
of	O
the	O
class	O
SCNScene	O
.	O
</s>
<s>
SCNNodes	O
are	O
the	O
primary	O
contents	O
of	O
the	O
SceneKit	B-Application
hierarchy	O
.	O
</s>
<s>
SCNScenes	O
also	O
contain	O
a	O
number	O
of	O
built-in	O
user	B-Application
interface	I-Application
controls	O
and	O
input/output	O
libraries	O
to	O
greatly	O
ease	O
implementing	O
simple	O
viewers	O
and	O
similar	O
tasks	O
.	O
</s>
<s>
The	O
integration	O
with	O
Xcode	B-Operating_System
allows	O
the	O
Scene	O
itself	O
to	O
be	O
placed	O
in	O
a	O
window	O
in	O
Interface	O
Builder	O
,	O
without	O
any	O
code	O
at	O
all	O
.	O
</s>
<s>
There	O
is	O
a	O
Scenekit	B-Application
archive	O
file	O
format	O
,	O
using	O
the	O
filename	O
extension	O
.	O
</s>
