Hi Brian,

Why not first convert a simple / smal one to got your on idea?

Because hard to say without any further info, cpu, memory etc.

Success!

Harm

Bryan Lee schreef op 2022-04-09 05:40:

Thannks Harm!

That's a good idea.  I've considered it.  That does mean I'll have to learn
FreeCAD.  (I've already put So much time into tying to do this conversion.)

FreeCAD is using
1.655 GB RAM
using 100% of one CPU core: Intel(R) Core(TM) i7-6500U CPU @ 2.50GHz

Also, I started the export at 7pm Friday, it's currently 9am Sunday, so
FreeCAD has been trying to export to OpenSCAD for 38 hours.  I guess I
should kill the program at some point.  Nothing has been written to the
.scad file, so that's probably a bad sign...

Thus info@hjcreations.nl hast written on Sun, Apr 10, 2022 at 09:30:02AM +0200, and, according to prophecy, it shall come to pass that:

Killed the process after 47 hours with no output.  :-(

Thus Bryan Lee hast written on Sun, Apr 10, 2022 at 08:57:26AM -0400, and, according to prophecy, it shall come to pass that:

With this and other similar questions recently: is the import to OpenSCAD
necessary? I’d probably design what needs to be designed in OpenSCAD and
then use Meshmixer to merge with the other part.

On Sun, Apr 10, 2022 at 6:04 PM Bryan Lee leebc11@acm.org wrote:

I can't see why it would take significant time to convert from one CAD
format to another. It doesn't seem like it is necessary to render any
geometry, when OpenSCAD only needs text.  Seems like a bug that causes an
infinite loop.

On Mon, 11 Apr 2022 at 00:12, Father Horton fatherhorton@gmail.com wrote:

"export to OpenSCAD" makes me think that some arbitrary CAD design has
to be decomposed into OpenSCAD source code.  That sounds stunningly
challenging.  Perhaps I am misunderstanding the original posting

On 4/10/2022 7:14 PM, nop head wrote:

On Sun, Apr 10, 2022 at 07:26:28PM -0400, jon wrote:

If you can export-to-stl, you can also export-to-openscad in the same
way.

An STL is essentially a list-of-vertices and then a list-of-triangles
where each triangle is three references to a vertex from the list.

You can do that in openscad exactly like that.

points = [[0,0,0],[0,0,1], [0,1,0],[0,1,1],
[1,0,0],[1,0,1], [1,1,0],[1,1,1]];
triangles = [[0,1,2],[1,2,3],  [0,1,4], [1,4,5],
[0,2,4],[2,4,6],  [7,6,5], [6,5,4],
[7,6,3],[6,3,2], [7,5,3], [5,3,1];
polyhedron (points=points, faces=triangles, convexity=5);

Roger. 

--
** R.E.Wolff@BitWizard.nl ** https://www.BitWizard.nl/ ** +31-15-2049110 **
**    Delftechpark 11 2628 XJ  Delft, The Netherlands.  KVK: 27239233    **
f equals m times a. When your f is steady, and your m is going down
your a is going up.  -- Chris Hadfield about flying up the space shuttle.

It seems extremely difficult to me.
How would you decide the ordering or sequence of arbitrary points.

On Mon, 11 Apr 2022, 12:58 Rogier Wolff, R.E.Wolff@bitwizard.nl wrote:

CAD designs are not arbitrary points on meshes. They are some
representation of primitives and operations on them, just as OpenSCAD is.
So it can't be too hard to convert one internal representation, which is
generally a tree, to OpenSCAD, which is a textual representation of a tree.
The only issues are when there are missing primitives or missing operations
in OpenSCAD compared to FreeCAD. For example if you can make fillets easily
in FreeCAD then it would get tricky to represent them in OpenSCAD. But I
can't see it being computationally expensive until the geometry actually
needs to be rendered in OpenSCAD.

On Mon, 11 Apr 2022 at 08:46, Sanjeev Prabhakar sprabhakar2006@gmail.com
wrote: