<s>
GNU	B-Application
3DLDF	I-Application
is	O
a	O
GNU	B-Operating_System
software	O
package	O
for	O
three-dimensional	O
technical	O
drawing	O
.	O
</s>
<s>
Currently	O
,	O
its	O
only	O
form	O
of	O
output	O
is	O
MetaPost	B-Language
code	O
.	O
</s>
<s>
GNU	B-Application
3DLDF	I-Application
is	O
written	O
in	O
C++	B-Language
using	O
the	O
CWEB	B-Application
package	O
created	O
by	O
Donald	O
Knuth	O
and	O
Silvio	O
Levy	O
.	O
</s>
<s>
It	O
is	O
intended	O
,	O
among	O
other	O
things	O
,	O
to	O
provide	O
a	O
convenient	O
way	O
of	O
creating	O
3D	O
graphics	O
for	O
inclusion	O
in	O
TeX	B-Application
documents	O
and	O
to	O
fit	O
in	O
with	O
the	O
"	O
family	O
"	O
of	O
programs	O
associated	O
with	O
TeX	B-Application
.	O
</s>
<s>
3DLDF	B-Application
stands	O
for	O
"	O
3D	O
"	O
plus	O
the	O
initials	O
of	O
the	O
author	O
(	O
LDF	O
)	O
.	O
</s>
<s>
3DLDF	B-Application
seemed	O
not	O
a	O
pure	O
MetaPost	B-Language
package	O
as	O
it	O
is	O
written	O
in	O
C++	B-Language
using	O
CWEB	B-Application
,	O
but	O
in	O
2004	O
,	O
it	O
was	O
seen	O
by	O
some	O
as	O
the	O
greatest	O
promise	O
for	O
MetaPost	B-Language
's	O
3D	O
drawing	O
capabilities	O
.	O
</s>
