echo([1]+[1,2] ); echo([2]*([1]+[1,2])); echo([2]*[1] + [2]*[1,2]); // ECHO: [2] ??? // ECHO: 4 // ECHO: undef Is this intentional or a bug?

Would you expect a 1D or a 2D value as sum of a 1D vector and a 2D vector? OpenSCAD silently returns a value procrusted to the lowest dimension. Matlab returns a 2D value and doesn't differentiate between [1] and 1. Is it, what you are opting for? echo([1]+[1,2] ); // [2] echo([1, 2, 3]+[1, 2]); //[1, 4] echo(1+[1,2] ); // undef -- Sent from: http://forum.openscad.org/

I would expect undef as the sum. So, [2]*([1]+[1,2]) == [2]*[1]+[2]*[1,2]) == undef Em qua, 5 de dez de 2018 às 17:07, Parkinbot <rudolf@digitaldocument.de> escreveu: > Would you expect a 1D or a 2D value as sum of a 1D vector and a 2D vector? > OpenSCAD silently returns a value procrusted to the lowest dimension. > Matlab > returns a 2D value and doesn't differentiate between [1] and 1. Is it, what > you are opting for? > > echo([1]+[1,2] ); // [2] > echo([1, 2, 3]+[1, 2]); //[1, 4] > echo(1+[1,2] ); // undef > > > > > -- > Sent from: http://forum.openscad.org/ > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >

I would not expect the truncation, so: echo([1]+[1,2] ); // [2, 2] echo([1, 2, 3]+[1, 2]); //[2, 4, 3] echo(1+[1,2] ); // undef On Wed, 5 Dec 2018 at 17:34, Ronaldo Persiano <rcmpersiano@gmail.com> wrote: > I would expect undef as the sum. So, [2]*([1]+[1,2]) == [2]*[1]+[2]*[1,2]) > == undef > > Em qua, 5 de dez de 2018 às 17:07, Parkinbot <rudolf@digitaldocument.de> > escreveu: > >> Would you expect a 1D or a 2D value as sum of a 1D vector and a 2D >> vector? >> OpenSCAD silently returns a value procrusted to the lowest dimension. >> Matlab >> returns a 2D value and doesn't differentiate between [1] and 1. Is it, >> what >> you are opting for? >> >> echo([1]+[1,2] ); // [2] >> echo([1, 2, 3]+[1, 2]); //[1, 4] >> echo(1+[1,2] ); // undef >> >> >> >> >> -- >> Sent from: http://forum.openscad.org/ >> >> _______________________________________________ >> OpenSCAD mailing list >> Discuss@lists.openscad.org >> http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >> > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >

I would expect echo([1]+[2,3]) // undef echo(1+[2,3]) // [3,4] echo(1+[1,2,3]) // [2,3,4] following the pattern echo(5*[1,2]); // [5,10] echo([5]*[1,2]); // undef -- Sent from: http://forum.openscad.org/