<s>
SolveSpace	B-Algorithm
is	O
a	O
free	B-License
and	I-License
open-source	I-License
2D/3D	O
constraint-based	O
parametric	O
computer-aided	B-Application
design	I-Application
(	O
CAD	B-Application
)	O
software	O
that	O
supports	O
basic	O
2D	O
and	O
3D	O
constructive	O
solid	O
geometry	O
modeling	O
.	O
</s>
<s>
It	O
is	O
a	O
constraint-based	O
parametric	O
modeler	O
with	O
simple	O
mechanical	O
simulation	O
capabilities	O
.	O
</s>
<s>
Version	O
2.1	O
and	O
onward	O
runs	O
on	O
Windows	O
,	O
Linux	B-Application
and	O
macOS	B-Application
.	O
</s>
<s>
The	O
Linux	B-Application
version	O
is	O
shipped	O
as	O
a	O
snap	B-Application
and	O
native	O
packages	O
.	O
</s>
<s>
By	O
default	O
,	O
SolveSpace	B-Algorithm
utilizes	O
its	O
own	O
CAD	B-Application
file	I-Application
format	O
called	O
for	O
model	O
storage	O
.	O
</s>
<s>
It	O
is	O
possible	O
to	O
export	O
models	O
as	O
a	O
whole	O
or	O
in	O
part	O
to	O
various	O
formats	O
such	O
as	O
PDF	B-Application
,	O
SVG	B-Application
,	O
or	O
Encapsulated	B-Language
PostScript	I-Language
(	O
EPS	B-Language
)	O
.	O
</s>
<s>
Development	O
of	O
SolveSpace	B-Algorithm
started	O
in	O
2008	O
as	O
commercial	B-Application
proprietary	B-Application
software	I-Application
for	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
A	O
previous	O
software	O
package	O
called	O
SketchFlat	O
,	O
also	O
developed	O
by	O
Westhues	O
,	O
was	O
replaced	O
by	O
SolveSpace	B-Algorithm
.	O
</s>
<s>
In	O
2012	O
version	O
1.9	O
released	O
as	O
unrestricted	O
freeware	B-License
proprietary	B-Application
software	I-Application
.	O
</s>
<s>
In	O
2013	O
version	O
2.0	O
released	O
as	O
free	B-License
and	I-License
open-source	I-License
software	I-License
.	O
</s>
<s>
In	O
2016	O
version	O
2.1	O
brings	O
support	O
for	O
Linux	B-Application
and	O
MacOS	B-Application
.	O
</s>
<s>
According	O
to	O
an	O
interview	O
given	O
in	O
2020	O
by	O
a	O
major	O
maintainer	O
SolveSpace	B-Algorithm
aims	O
to	O
be	O
backwards	B-General_Concept
compatibile	I-General_Concept
as	O
much	O
as	O
possible	O
.	O
</s>
<s>
SolveSpace	B-Algorithm
is	O
free	B-License
and	I-License
open	I-License
source	I-License
software	I-License
distributed	O
under	O
the	O
GPL-3.0-or-later	B-License
license	O
.	O
</s>
<s>
SolveSpace	B-Algorithm
is	O
shipped	O
with	O
the	O
following	O
basic	O
features	O
:	O
</s>
<s>
SolveSpace	B-Algorithm
supports	O
parametric	O
2D	O
drawing	O
of	O
lines	O
,	O
circles	O
,	O
arcs	O
,	O
Cubic	O
bézier	O
curves	O
etc	O
;	O
datum	O
points	O
and	O
lines	O
are	O
also	O
supported	O
for	O
general	O
,	O
reference	O
based	O
modeling	O
.	O
</s>
<s>
In	O
3D	O
it	O
is	O
possible	O
to	O
use	O
basic	O
Boolean	O
operations	O
(	O
union	O
,	O
difference	O
,	O
intersection	O
)	O
,	O
though	O
as	O
of	O
version	O
3.0	O
,	O
SolveSpace	B-Algorithm
had	O
limitations	O
on	O
the	O
order	O
of	O
application	O
of	O
these	O
operations	O
.	O
</s>
<s>
By	O
using	O
the	O
built-in	O
constraint	B-Algorithm
solver	O
it	O
is	O
possible	O
to	O
visualize	O
planar	O
or	O
spatial	O
linkages	O
with	O
pin	O
,	O
ball	O
,	O
or	O
slide	O
joints	O
,	O
trace	O
their	O
movements	O
,	O
and	O
export	O
its	O
data	O
in	O
CSV	O
format	O
.	O
</s>
<s>
SolveSpace	B-Algorithm
allows	O
solids	O
to	O
be	O
imported	O
in	O
a	O
special	O
mode	O
that	O
does	O
not	O
allow	O
modeling	O
.	O
</s>
<s>
SolveSpace	B-Algorithm
can	O
open	O
and	O
import	O
its	O
own	O
textual	O
file	O
formats	O
for	O
both	O
editing	O
and	O
assembly	O
.	O
</s>
<s>
The	O
DXF/DWG	O
file	O
format	O
AutoCAD	B-Algorithm
(	O
version	O
2007	O
)	O
is	O
supported	O
for	O
opening	O
and	O
editing	O
.	O
</s>
<s>
SolveSpace	B-Algorithm
v3.0	O
is	O
able	O
to	O
export	O
2D	O
sketches	O
and	O
surfaces	O
into	O
DXF/DWG	O
(	O
AutoCAD	B-Algorithm
version	O
2007	O
)	O
,	O
PDF	B-Application
,	O
SVG	B-Application
,	O
EPS	B-Language
,	O
and	O
HPGL	B-Language
file	O
formats	O
.	O
</s>
<s>
Polygon	B-Algorithm
meshes	I-Algorithm
can	O
be	O
exported	O
as	O
STL	O
and	O
Wavefront	O
OBJ	O
;	O
NURBS	O
as	O
STEP	O
.	O
</s>
<s>
SolveSpace	B-Algorithm
is	O
able	O
to	O
export	O
models	O
in	O
STEP	O
,	O
STL	O
,	O
and	O
G-code	O
for	O
reuse	O
in	O
third-party	O
CAM	O
software	O
.	O
</s>
<s>
SolveSpace	B-Algorithm
can	O
link	O
its	O
own	O
,	O
STL	O
and	O
IDF	B-Algorithm
files	O
as	O
external	O
parts	O
into	O
complex	O
assembly	O
.	O
</s>
<s>
SolveSpace	B-Algorithm
workflow	O
starts	O
either	O
with	O
opening	O
an	O
existing	O
file	O
or	O
creating	O
a	O
new	O
one	O
and	O
usually	O
involves	O
sketching	O
.	O
</s>
<s>
When	O
the	O
model	O
is	O
complete	O
,	O
it	O
is	O
either	O
exported	O
to	O
one	O
of	O
the	O
supported	O
CAD	B-Application
formats	O
or	O
into	O
a	O
document	O
for	O
further	O
processing	O
.	O
</s>
<s>
Modeling	O
in	O
SolveSpace	B-Algorithm
is	O
done	O
by	O
way	O
of	O
sketching	O
in	O
a	O
workplane	O
.	O
</s>
<s>
A	O
workplane	O
is	O
plane	O
with	O
an	O
origin	O
for	O
the	O
new	O
sketch	O
where	O
the	O
SolveSpace	B-Algorithm
draws	O
entities	O
.	O
</s>
<s>
SolveSpace	B-Algorithm
can	O
split	O
intersecting	O
entities	O
via	O
a	O
separate	O
tool	O
.	O
</s>
<s>
Users	O
can	O
snap	B-Application
points	O
to	O
a	O
grid	O
.	O
</s>
<s>
Constraints	O
include	O
dimension	O
limitation	O
,	O
angle	B-Language
,	O
paralleling	O
with	O
another	O
line	O
,	O
tangency	O
,	O
point	O
,	O
symmetry	O
and	O
alignment	O
of	O
a	O
line	O
with	O
origin	O
axes	O
(	O
to	O
make	O
them	O
"	O
vertical	O
"	O
or	O
"	O
horizontal	O
"	O
)	O
.	O
</s>
<s>
Every	O
group	O
in	O
SolveSpace	B-Algorithm
encapsulates	O
an	O
action	O
applied	O
to	O
the	O
specified	O
sketch	O
created	O
for	O
every	O
3D	O
operation	O
,	O
such	O
as	O
an	O
extrusion	O
,	O
rotation	O
,	O
or	O
translation	O
.	O
</s>
<s>
In	O
order	O
to	O
verify	O
a	O
newly	O
modeled	O
concept	O
in	O
SolveSpace	B-Algorithm
,	O
users	O
can	O
"	O
link	O
"	O
all	O
the	O
components	O
and	O
constrain	O
them	O
at	O
specific	O
positions	O
to	O
check	O
whether	O
the	O
virtual	O
end-product	O
meets	O
the	O
original	O
concept	O
's	O
design	O
and	O
constraints	O
.	O
</s>
<s>
SolveSpace	B-Algorithm
depends	O
upon	O
ANGLE	B-Language
,	O
OpenGL	B-Library
Utility	I-Library
Library	I-Library
,	O
zlib	B-Language
,	O
libpng	B-Language
,	O
libdxfrw	O
,	O
cairo	B-Language
,	O
mimalloc	B-General_Concept
,	O
libsigc++	B-Language
and	O
some	O
other	O
C++	B-Language
libraries	O
,	O
as	O
well	O
as	O
freetype2	B-Application
,	O
harfbuzz	B-Language
,	O
and	O
Pango	B-Language
for	O
text	O
rendering	O
.	O
</s>
<s>
Linux	B-Application
specific	O
libraries	O
include	O
gtk-3	B-Application
,	O
Gio	O
,	O
and	O
X11	B-Operating_System
.	O
</s>
<s>
As	O
of	O
v2.1.	O
,	O
SolveSpace	B-Algorithm
reference	O
lists	O
a	O
disclaimer	O
on	O
limited	O
support	O
for	O
NURB-surface	O
Boolean	O
operations	O
which	O
may	O
occasionally	O
fail	O
.	O
</s>
<s>
As	O
of	O
v3.0	O
SolveSpace	B-Algorithm
did	O
n't	O
provide	O
functionality	O
for	O
chamfers/fillets	O
on	O
top	O
of	O
3D	O
solid	O
body	O
.	O
</s>
<s>
SolveSpace	B-Algorithm
may	O
fit	O
well	O
for	O
simpler	O
CAM	O
models	O
,	O
but	O
not	O
for	O
sophisticated	O
ones	O
.	O
</s>
<s>
A	O
2013	O
article	O
and	O
interview	O
with	O
the	O
main	O
developer	O
published	O
in	O
Libre	O
Graphics	O
World	O
has	O
praised	O
SolveSpace	B-Algorithm
for	O
its	O
small	O
executable	O
file	O
size	O
,	O
advanced	O
constraints	O
solver	O
,	O
and	O
output	O
formats	O
.	O
</s>
<s>
boolean	O
operations	O
)	O
and	O
a	O
lack	O
of	O
native	O
Linux	B-Application
support	O
,	O
the	O
latter	O
of	O
which	O
has	O
since	O
been	O
rectified	O
.	O
</s>
