<s>
Panda3D	B-Language
is	O
a	O
game	O
engine	O
that	O
includes	O
graphics	O
,	O
audio	O
,	O
I/O	O
,	O
collision	O
detection	O
,	O
and	O
other	O
abilities	O
relevant	O
to	O
the	O
creation	O
of	O
3D	O
games	O
.	O
</s>
<s>
Panda3D	B-Language
is	O
free	O
,	O
open-source	O
software	O
under	O
the	O
revised	B-Operating_System
BSD	I-Operating_System
license	O
.	O
</s>
<s>
Panda3D	B-Language
's	O
intended	O
game-development	O
language	O
is	O
Python	B-Language
.	O
</s>
<s>
The	O
engine	O
itself	O
is	O
written	O
in	O
C++	B-Language
and	O
utilizes	O
an	O
automatic	O
wrapper-generator	O
to	O
expose	O
the	O
complete	O
functionality	O
of	O
the	O
engine	O
in	O
a	O
Python	B-Language
interface	O
.	O
</s>
<s>
This	O
approach	O
gives	O
a	O
developer	O
the	O
advantages	O
of	O
Python	B-Language
development	O
,	O
such	O
as	O
rapid	O
development	O
and	O
advanced	O
memory	O
management	O
,	O
but	O
keeps	O
the	O
performance	O
of	O
a	O
compiled	O
language	O
in	O
the	O
engine	O
core	O
.	O
</s>
<s>
For	O
instance	O
,	O
the	O
engine	O
is	O
integrated	O
with	O
Python	B-Language
's	O
garbage	O
collector	O
,	O
and	O
engine	O
structures	O
are	O
automatically	O
managed	O
.	O
</s>
<s>
The	O
manual	O
and	O
the	O
sample	O
programs	O
use	O
Python	B-Language
by	O
default	O
,	O
with	O
C++	B-Language
available	O
as	O
an	O
alternate	O
.	O
</s>
<s>
Python	B-Language
is	O
the	O
most	O
commonly	O
used	O
language	O
by	O
developers	O
,	O
but	O
C++	B-Language
is	O
also	O
common	O
.	O
</s>
<s>
The	O
users	O
of	O
Panda3D	B-Language
include	O
the	O
developers	O
of	O
several	O
large	O
commercial	O
games	O
,	O
a	O
few	O
open	O
source	O
projects	O
,	O
and	O
a	O
number	O
of	O
university	O
courses	O
that	O
leverage	O
Panda3D	B-Language
's	O
short	O
learning	O
curve	O
.	O
</s>
<s>
They	O
built	O
an	O
attraction	O
called	O
"	O
Aladdin	O
's	O
Magic	O
Carpet	O
,	O
"	O
and	O
the	O
engine	O
they	O
created	O
for	O
that	O
eventually	O
became	O
Panda3D	B-Language
.	O
</s>
<s>
Over	O
time	O
,	O
Panda3D	B-Language
was	O
used	O
for	O
additional	O
VR	O
rides	O
at	O
Disney	O
theme	O
parks	O
,	O
and	O
was	O
eventually	O
used	O
in	O
the	O
creation	O
of	O
Toontown	B-Protocol
Online	I-Protocol
,	O
an	O
online	O
game	O
set	O
in	O
a	O
cartoon	O
world	O
,	O
and	O
later	O
for	O
the	O
second	O
MMORPG	B-Protocol
,	O
Pirates	B-Protocol
of	I-Protocol
the	I-Protocol
Caribbean	I-Protocol
Online	I-Protocol
.	O
</s>
<s>
However	O
,	O
it	O
took	O
some	O
time	O
for	O
Panda3D	B-Language
to	O
take	O
off	O
as	O
an	O
open-source	O
project	O
.	O
</s>
<s>
Panda3D	B-Language
's	O
name	O
was	O
once	O
an	O
acronym	O
:	O
"	O
Platform	O
Agnostic	O
Networked	O
Display	O
Architecture.	O
"	O
</s>
<s>
However	O
,	O
since	O
that	O
phrase	O
has	O
largely	O
lost	O
its	O
meaning	O
,	O
the	O
word	O
"	O
Panda3D	B-Language
"	O
is	O
rarely	O
thought	O
of	O
as	O
an	O
acronym	O
any	O
more	O
.	O
</s>
<s>
Panda3D	B-Language
is	O
a	O
scene	B-Data_Structure
graph	I-Data_Structure
engine	O
.	O
</s>
<s>
Panda3D	B-Language
does	O
not	O
distinguish	O
between	O
"	O
large	O
"	O
3D	O
models	O
,	O
such	O
as	O
the	O
model	O
of	O
an	O
entire	O
dungeon	O
or	O
island	O
,	O
and	O
"	O
small	O
"	O
3D	O
models	O
,	O
such	O
as	O
a	O
model	O
of	O
a	O
table	O
or	O
a	O
sword	O
.	O
</s>
<s>
Both	O
large	O
and	O
small	O
models	O
are	O
created	O
using	O
a	O
standard	O
modeling	O
program	O
such	O
as	O
Blender	B-Application
,	O
3ds	B-Language
Max	I-Language
,	O
or	O
Maya	B-Language
.	O
</s>
<s>
The	O
models	O
are	O
then	O
loaded	O
into	O
Panda3D	B-Language
and	O
inserted	O
into	O
the	O
Cartesian	O
space	O
.	O
</s>
<s>
The	O
Panda3D	B-Language
scene	B-Data_Structure
graph	I-Data_Structure
exposes	O
the	O
functionality	O
of	O
OpenGL	O
and	O
DirectX	B-Application
in	O
a	O
fairly	O
literal	O
form	O
.	O
</s>
<s>
For	O
instance	O
,	O
OpenGL	O
and	O
DirectX	B-Application
both	O
have	O
fog	O
capabilities	O
.	O
</s>
<s>
To	O
enable	O
fog	O
in	O
Panda3D	B-Language
,	O
one	O
simply	O
stores	O
the	O
fog	O
parameters	O
on	O
a	O
node	O
in	O
the	O
scene	B-Data_Structure
graph	I-Data_Structure
.	O
</s>
<s>
In	O
this	O
way	O
,	O
Panda3D	B-Language
can	O
be	O
seen	O
as	O
a	O
thin	O
wrapper	O
around	O
the	O
lower-level	O
APIs	O
.	O
</s>
<s>
Where	O
it	O
differs	O
from	O
them	O
is	O
that	O
it	O
stores	O
the	O
scene	O
,	O
whereas	O
OpenGL	O
and	O
DirectX	B-Application
do	O
not	O
.	O
</s>
<s>
Panda3D	B-Language
was	O
first	O
engineered	O
before	O
the	O
existence	O
of	O
vertex	O
and	O
pixel	O
shaders	O
.	O
</s>
<s>
To	O
remedy	O
this	O
situation	O
,	O
the	O
Panda3D	B-Language
developers	O
have	O
recently	O
given	O
Panda3D	B-Language
the	O
ability	O
to	O
synthesize	O
shaders	O
automatically	O
.	O
</s>
<s>
This	O
synthesis	O
occurs	O
if	O
the	O
3D	O
modeler	O
marks	O
a	O
model	O
for	O
per-pixel	O
lighting	O
,	O
or	O
if	O
the	O
modeler	O
applies	O
a	O
normal	B-Application
map	I-Application
,	O
gloss	O
map	O
,	O
self-illumination	O
map	O
,	O
or	O
other	O
capability	O
that	O
exceeds	O
the	O
capabilities	O
of	O
the	O
fixed-function	O
pipeline	O
.	O
</s>
<s>
Panda3D	B-Language
provides	O
capabilities	O
other	O
than	O
3D	O
rendering	O
.	O
</s>
<s>
Panda3D	B-Language
is	O
open	O
source	O
and	O
is	O
,	O
as	O
of	O
May	O
28	O
,	O
2008	O
,	O
free	B-Application
software	I-Application
under	O
the	O
revised	B-Operating_System
BSD	I-Operating_System
license	O
.	O
</s>
<s>
Releases	O
prior	O
to	O
that	O
date	O
are	O
not	O
considered	O
free	B-Application
software	I-Application
due	O
to	O
certain	O
errors	O
in	O
the	O
design	O
of	O
the	O
old	O
Panda3D	B-Language
license	O
.	O
</s>
<s>
Despite	O
this	O
,	O
those	O
older	O
releases	O
of	O
Panda3D	B-Language
can	O
also	O
be	O
used	O
for	O
both	O
free	O
and	O
commercial	O
game	O
development	O
at	O
no	O
financial	O
cost	O
.	O
</s>
<s>
In	O
2002	O
,	O
when	O
the	O
engine	O
was	O
open	O
sourced	O
,	O
the	O
goal	O
of	O
the	O
developers	O
was	O
to	O
create	O
a	O
free	B-License
software	I-License
license	I-License
.	O
</s>
<s>
On	O
May	O
28	O
,	O
2008	O
,	O
the	O
trunk	O
of	O
Panda3D	B-Language
development	O
switched	O
to	O
the	O
BSD	B-Operating_System
license	I-Operating_System
.	O
</s>
<s>
Panda3D	B-Language
makes	O
use	O
of	O
several	O
third-party	O
libraries	O
whose	O
licenses	O
are	O
not	O
free	B-Application
software	I-Application
,	O
including	O
FMOD	B-Application
,	O
Nvidia	B-Language
Cg	I-Language
,	O
DirectX	B-Application
,	O
and	O
MFC	B-Language
.	O
</s>
