<s>
Reactor	B-Application
is	O
a	O
physics	O
engine	O
developed	O
by	O
the	O
Irish	O
software	O
company	O
Havok	O
for	O
use	O
in	O
Autodesk	B-Language
3ds	I-Language
Max	I-Language
.	O
</s>
<s>
Reactor	B-Application
was	O
fully	O
integrated	O
with	O
3ds	B-Language
Max	I-Language
from	O
versions	O
5	O
to	O
2011	O
.	O
</s>
<s>
In	O
3ds	B-Language
Max	I-Language
2012	O
,	O
Reactor	B-Application
was	O
replaced	O
by	O
a	O
PhysX-based	O
engine	O
called	O
MassFX	O
.	O
</s>
<s>
Reactor	B-Application
was	O
often	O
used	O
for	O
realistic	O
physics	O
simulation	O
that	O
would	O
be	O
difficult	O
or	O
time-consuming	O
to	O
animate	O
by	O
hand	O
.	O
</s>
<s>
Reactor	B-Application
is	O
capable	O
of	O
computing	O
rigid	O
body	O
,	O
soft	O
body	O
,	O
cloth	O
,	O
and	O
rope	O
collisions	O
.	O
</s>
<s>
Reactor	B-Application
can	O
also	O
simulate	O
dynamics	O
of	O
any	O
supported	O
type	O
interacting	O
with	O
a	O
water	O
volume	O
,	O
with	O
adjustable	O
viscosity	B-Application
and	O
depth	O
.	O
</s>
<s>
Reactor	B-Application
includes	O
a	O
large	O
number	O
of	O
forces	O
that	O
can	O
be	O
used	O
in	O
simulation	O
,	O
apart	O
from	O
the	O
default	O
gravity	O
:	O
springs	O
,	O
dashpots	O
,	O
motors	O
,	O
wind	O
,	O
fractures	O
(	O
breakable	O
objects	O
)	O
,	O
and	O
a	O
"	O
toy	O
car	O
"	O
type	O
,	O
with	O
definable	O
body/axis/wheels	O
.	O
</s>
<s>
Reactor	B-Application
also	O
has	O
many	O
constraints	O
available	O
,	O
including	O
hinges	O
,	O
point-to-point	O
constraints	O
,	O
prismatic	O
constraints	O
,	O
car-wheel	O
constraints	O
,	O
point-to-path	O
constraints	O
,	O
and	O
ragdoll	O
constraints	O
to	O
simulate	O
a	O
lifeless	O
body	O
.	O
</s>
<s>
In	O
addition	O
,	O
Reactor	B-Application
is	O
compatible	O
with	O
Space	O
Warp	O
modifiers	O
in	O
3ds	B-Language
Max	I-Language
.	O
</s>
