how to create a gaudi' arch (a catenary arch)?\ the formula should be:\ y=a cosh(x/a)= (a/2)\*\[e^(x/a)+e^(-x/a)\]\ \ Thank you in advance, OdaepO

This might help https://github.com/nophead/NopSCADlib?tab=readme-ov-file#catenary. On Wed, 17 Jan 2024 at 23:21, oda via Discuss <discuss@lists.openscad.org> wrote: > how to create a gaudi' arch (a catenary arch)? > the formula should be: > y=a cosh(x/a)= (a/2)*[e^(x/a)+e^(-x/a)] > > Thank you in advance, > > OdaepO > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >

Maybe something like this? > a = 5; > > function y(x) = (a/2)*(exp(x/a)+exp(-x/a)); > > points = [for (x = [-10 : 0.1 : 10]) [x,y(x)]]; > linear_extrude(10) polygon(points); > > Cheers, Steve On 2024-01-17 3:21 p.m., oda via Discuss wrote: > > how to create a gaudi' arch (a catenary arch)? > the formula should be: > y=a cosh(x/a)= (a/2)*[e^(x/a)+e^(-x/a)] > > Thank you in advance, > > OdaepO > > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email todiscuss-leave@lists.openscad.org -- https://www.gnomoni.ca https://www.youtube.com/@gnomonica

I did a catenary arch thing (probably not as good as the other posters) sometime before 2018. You will probably need to watch out for floating point math snafus. I was doing large elongated catenary domes and the points got too close to each other. I could render my dome complex but when I joined it with other structures it disappeared (which at the time was typical for a poorly formed solid unioning with another) On Wed, Jan 17, 2024 at 6:22 PM oda via Discuss <discuss@lists.openscad.org> wrote: > how to create a gaudi' arch (a catenary arch)? > the formula should be: > y=a cosh(x/a)= (a/2)*[e^(x/a)+e^(-x/a)] > > Thank you in advance, > > OdaepO > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >