<s>
In	O
computing	O
,	O
D3DX	B-Library
(	O
Direct3D	B-Application
Extension	O
)	O
is	O
a	O
high	O
level	O
API	B-General_Concept
library	O
which	O
is	O
written	O
to	O
supplement	O
Microsoft	O
's	O
Direct3D	B-Application
graphics	O
API	B-General_Concept
.	O
</s>
<s>
The	O
D3DX	B-Library
library	O
was	O
introduced	O
in	O
Direct3D	B-Application
7	O
,	O
and	O
subsequently	O
was	O
improved	O
in	O
Direct3D	B-Application
9	O
.	O
</s>
<s>
It	O
provides	O
classes	O
for	O
common	O
calculations	O
on	O
vectors	O
,	O
matrices	B-Architecture
and	O
colors	O
,	O
calculating	O
look-at	O
and	O
projection	O
matrices	B-Architecture
,	O
spline	O
interpolations	O
,	O
and	O
several	O
more	O
complicated	O
tasks	O
,	O
such	O
as	O
compiling	O
or	O
assembling	O
shaders	O
used	O
for	O
3D	O
graphic	O
programming	O
,	O
compressed	O
skeletal	O
animation	O
storage	O
and	O
matrix	O
stacks	O
.	O
</s>
<s>
There	O
are	O
several	O
functions	O
that	O
provide	O
complex	O
operations	O
over	O
3D	O
meshes	O
like	O
tangent-space	O
computation	O
,	O
mesh	O
simplification	O
,	O
precomputed	B-General_Concept
radiance	I-General_Concept
transfer	I-General_Concept
,	O
optimizing	O
for	O
vertex	O
cache	O
friendliness	O
and	O
strip	O
reordering	O
,	O
and	O
generators	O
for	O
3D	O
text	O
meshes	O
.	O
</s>
<s>
The	O
D3DX	B-Library
library	O
contains	O
pre-written	O
routines	O
for	O
doing	O
things	O
common	O
to	O
most	O
2D/3D	O
applications	O
,	O
such	O
as	O
games	O
.	O
</s>
<s>
Since	O
the	O
Direct3D	B-Application
API	B-General_Concept
is	O
relatively	O
low-level	O
,	O
using	O
the	O
D3DX	B-Library
library	O
is	O
usually	O
much	O
simpler	O
.	O
</s>
<s>
In	O
2012	O
,	O
Microsoft	O
announced	O
that	O
D3DX	B-Library
9	O
,	O
D3DX	B-Library
10	O
,	O
and	O
D3DX	B-Library
11	O
would	O
be	O
deprecated	B-General_Concept
in	O
the	O
Windows	B-Application
8	I-Application
SDK	O
,	O
along	O
with	O
other	O
development	O
frameworks	O
such	O
as	O
XNA	B-Device
.	O
</s>
<s>
Shader	O
effects	O
,	O
texture	O
management	O
,	O
geometry	O
optimizations	O
and	O
mesh	O
models	O
are	O
available	O
as	O
separate	O
sources	O
published	O
through	O
GitHub	B-Application
.	O
</s>
<s>
The	O
mathematical	O
constructs	O
of	O
D3DX	B-Library
,	O
like	O
vectors	O
and	O
matrices	B-Architecture
,	O
would	O
be	O
consolidated	O
with	O
XNAMath	O
into	O
a	O
DirectXMath	O
and	O
spherical	O
harmonics	O
math	O
is	O
provided	O
as	O
separate	O
source	O
.	O
</s>
<s>
The	O
D3DX	B-Library
library	O
follows	O
the	O
COM	B-Application
object	I-Application
oriented	O
programming	O
model	O
.	O
</s>
<s>
Functionality	O
is	O
accessed	O
using	O
C++	B-Language
-like	O
interfaces	O
.	O
</s>
<s>
Some	O
functions	O
in	O
D3DX	B-Library
operate	O
on	O
this	O
interface	O
.	O
</s>
<s>
It	O
is	O
used	O
for	O
Precomputed	B-General_Concept
Radiance	I-General_Concept
Transfer	I-General_Concept
-	O
a	O
technique	O
similar	O
to	O
spherical	O
harmonics	O
lighting	O
that	O
is	O
used	O
for	O
precomputed	O
global	O
illumination	O
and	O
soft	O
ambient	O
lighting	O
.	O
</s>
<s>
The	O
ID3DXSprite	O
interface	O
is	O
a	O
C++	B-Application
class	I-Application
used	O
for	O
drawing	O
a	O
2D	O
image	O
to	O
the	O
screen	O
known	O
as	O
a	O
sprite	O
in	O
computer	O
graphics	O
.	O
</s>
<s>
In	O
DirectX	B-Application
7	I-Application
this	O
was	O
typically	O
done	O
using	O
the	O
DirectDraw	B-Device
API	B-General_Concept
,	O
which	O
is	O
deprecated	B-General_Concept
.	O
</s>
<s>
A	O
common	O
criticism	O
of	O
the	O
D3DXSprite	O
was	O
that	O
it	O
was	O
slow	O
but	O
this	O
issue	O
has	O
been	O
addressed	O
as	O
of	O
Direct3D	B-Application
9	O
.	O
</s>
<s>
The	O
D3DX10	O
utility	O
library	O
for	O
Direct3D	B-Application
10	O
was	O
similar	O
to	O
the	O
D3DX	B-Library
for	O
Direct3D	B-Application
9	O
in	O
functionality	O
,	O
and	O
included	O
the	O
same	O
D3DXMath	O
library	O
and	O
Block	O
Compression	O
(	O
BC1-BC5	O
)	O
software	O
codecs	O
.	O
</s>
<s>
The	O
key	O
differences	O
were	O
that	O
Effects	O
for	O
Direct3D	B-Application
10	O
was	O
made	O
an	O
OS	O
component	O
,	O
the	O
HLSL	O
compiler	O
was	O
moved	O
to	O
a	O
distinct	O
D3DCompile	O
DLL	O
,	O
and	O
the	O
texture	O
image	O
load	O
&	O
save	O
code	O
utilized	O
the	O
Windows	O
Imaging	O
Component	O
.	O
</s>
<s>
As	O
a	O
consequence	O
of	O
the	O
shift	O
to	O
using	O
WIC	O
,	O
D3DX10	O
did	O
not	O
support	O
Truevision	O
TGA	O
,	O
RGBE	O
image	O
format	O
,	O
or	O
Portable	O
PixMap	O
file	O
formats	O
which	O
were	O
supported	O
by	O
D3DX	B-Library
.	O
</s>
<s>
D3DX10	O
also	O
did	O
not	O
include	O
the	O
UVAtlas	O
isochart	O
texture	O
atlasing	O
or	O
Precomputed	B-General_Concept
Radiance	I-General_Concept
Transfer	I-General_Concept
APIs	B-General_Concept
.	O
</s>
<s>
All	O
versions	O
of	O
D3DX10	O
are	O
deprecated	B-General_Concept
per	O
Microsoft	O
Docs	O
.	O
</s>
<s>
The	O
D3DX11	O
utility	O
library	O
for	O
Direct3D	B-Application
11	O
was	O
a	O
trimmed	O
down	O
version	O
of	O
D3DX10	O
.	O
</s>
<s>
All	O
versions	O
of	O
D3DX11	O
are	O
deprecated	B-General_Concept
per	O
Microsoft	O
Docs	O
.	O
</s>
<s>
Most	O
functionality	O
from	O
D3DX9	O
,	O
D3DX10	O
,	O
and	O
D3DX11	O
has	O
been	O
moved	O
to	O
open	O
source	O
projects	O
for	O
Direct3D	B-Application
11	O
or	O
later	O
:	O
DirectXMath	O
,	O
DirectX	B-Application
Tool	O
Kit	O
,	O
DirectXTex	O
,	O
DirectXMesh	O
,	O
and	O
UVAtlas	O
.	O
</s>
<s>
There	O
is	O
,	O
however	O
,	O
a	O
D3DX12	O
utility	O
header	O
(	O
all	O
inline	O
C++	B-Language
code	I-Language
)	O
for	O
some	O
basic	O
helpers	O
for	O
Direct3D	B-Application
12	O
documented	O
on	O
Microsoft	O
Docs	O
and	O
is	O
published	O
on	O
GitHub	B-Application
.	O
</s>
<s>
There	O
is	O
a	O
DirectX	B-Application
Tool	O
Kit	O
for	O
Direct3D	B-Application
12	O
which	O
provides	O
the	O
missing	O
functionality	O
.	O
</s>
