Ray, you never actually said what you want to do, but I think if you can do it in C, you can do it in OpenSCAD. It just might be a lot of trouble and really slow---depending on what you're doing. You just have to structure your code recursively instead of procedurally. On Sun, Jan 12, 2025 at 5:58 PM Raymond West via Discuss < discuss@lists.openscad.org> wrote: > that is what I inferred from the description in the wiki, that started > this thread > > On 12/01/2025 22:10, Father Horton via Discuss wrote: > > So it looks like variable a got a new value > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >

On 1/12/2025 2:10 PM, Father Horton via Discuss wrote: > Not to beat a dead horse, but if you run: > > a = 10; > echo(a); > a = 20; > echo(a); > > You get this: > > WARNING: a was assigned on line 1 but was overwritten in file > test.scad, line 3 > Compiling design (CSG Tree generation)... > ECHO: 20 > ECHO: 20 > > So it looks like variable a got a new value, but it never did. This actually demonstrates one of the ... interesting ... behaviors of OpenSCAD:  in any given scope, assignments happen before module invocations.  And echo() is a module invocation. There are several other more subtle ... interesting ... behaviors in this picture (and I actually wrote up a much longer message before deciding that it didn't really help). The biggest lesson is to set "Stop on the first warning", and fix any problems reported.

If you flog a dead horse enough, you get down to the bones. On 13/01/2025 01:11, Jordan Brown via Discuss wrote: > On 1/12/2025 2:10 PM, Father Horton via Discuss wrote: >> Not to beat a dead horse, but if you run: >> >> a = 10; >> echo(a); >> a = 20; >> echo(a); >> >> You get this: >> >> WARNING: a was assigned on line 1 but was overwritten in file >> test.scad, line 3 >> Compiling design (CSG Tree generation)... >> ECHO: 20 >> ECHO: 20 >> >> So it looks like variable a got a new value, but it never did. > > This actually demonstrates one of the ... interesting ... behaviors of > OpenSCAD:  in any given scope, assignments happen before module > invocations.  And echo() is a module invocation. > > There are several other more subtle ... interesting ... behaviors in > this picture (and I actually wrote up a much longer message before > deciding that it didn't really help). > > The biggest lesson is to set "Stop on the first warning", and fix any > problems reported. > > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email todiscuss-leave@lists.openscad.org