<s>
A	O
procedural	B-General_Concept
animation	I-General_Concept
is	O
a	O
type	O
of	O
computer	O
animation	O
,	O
used	O
to	O
automatically	O
generate	O
animation	O
in	O
real-time	O
to	O
allow	O
for	O
a	O
more	O
diverse	O
series	O
of	O
actions	O
than	O
could	O
otherwise	O
be	O
created	O
using	O
predefined	O
animations	O
.	O
</s>
<s>
Procedural	B-General_Concept
animation	I-General_Concept
is	O
used	O
to	O
simulate	O
particle	O
systems	O
(	O
smoke	O
,	O
fire	O
,	O
water	O
)	O
,	O
cloth	O
and	O
clothing	O
,	O
rigid	O
body	O
dynamics	O
,	O
and	O
hair	O
and	O
fur	O
dynamics	O
,	O
as	O
well	O
as	O
character	O
animation	O
.	O
</s>
<s>
In	O
video	O
games	O
,	O
it	O
is	O
often	O
used	O
for	O
simple	O
or	O
complex	O
actions	O
such	O
as	O
turning	O
a	O
character	O
's	O
head	O
whenever	O
a	O
player	O
looks	O
around	O
(	O
as	O
in	O
Quake	B-Application
III	I-Application
Arena	I-Application
)	O
or	O
ragdoll	O
physics	O
,	O
which	O
is	O
usually	O
used	O
for	O
the	O
death	O
of	O
a	O
character	O
in	O
which	O
the	O
ragdoll	O
will	O
realistically	O
fall	O
to	O
the	O
floor	O
.	O
</s>
<s>
Even	O
more	O
complex	O
examples	O
of	O
procedural	B-General_Concept
animation	I-General_Concept
can	O
be	O
found	O
in	O
the	O
game	O
Spore	B-Application
wherein	O
user-created	O
creatures	O
will	O
automatically	O
be	O
animated	O
to	O
all	O
actions	O
needed	O
in	O
the	O
game	O
from	O
walking	O
,	O
to	O
driving	O
,	O
to	O
picking	O
things	O
up	O
.	O
</s>
<s>
In	O
the	O
game	O
Unreal	B-Application
Tournament	I-Application
3	I-Application
,	O
bodies	O
who	O
have	O
gone	O
into	O
ragdoll	O
mode	O
to	O
fake	O
death	O
can	O
arise	O
from	O
any	O
position	O
into	O
which	O
they	O
have	O
fallen	O
and	O
get	O
back	O
on	O
their	O
feet	O
.	O
</s>
<s>
The	O
canceled	O
Indiana	B-Application
Jones	I-Application
game	O
from	O
LucasArts	O
shown	O
at	O
E3	O
2006	O
featured	O
character	O
motions	O
that	O
were	O
animated	O
entirely	O
in	O
real-time	O
,	O
with	O
characters	O
dodging	O
,	O
punching	O
,	O
and	O
reacting	O
to	O
the	O
environment	O
based	O
on	O
an	O
engine	O
called	O
Euphoria	B-Application
by	O
NaturalMotion	O
which	O
has	O
since	O
been	O
used	O
in	O
games	O
such	O
as	O
Grand	B-Application
Theft	I-Application
Auto	I-Application
IV	I-Application
and	O
Backbreaker	B-Application
.	O
</s>
