Hi Ray, Just a postscript to mention that cumulative summing of vector elements can be done very compactly using list comprehensions.  I am not yet proficient in working with list comprehensions so would struggle to write the code myself, but fortunately there's an example in the documentation. See "Cumulative sum of values in v" at https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/The_OpenSCAD_Language#for You end up with: // points from wall distances n = [0,1];s=[0,-1];e=[1,0];w=[-1,0]; p = [e*0,w*8.5,s*38,w*5,w*95,w*110,w*50,w*4,n*37,w*75,n*7,w*44,s*8,w*52,w*62,w*70,w*39,w*69,w*43,s*90,e*726.5]; function cumsum(v) = [for (a = v[0]-v[0], i = 0; i < len(v); a = a+v[i], i = i+1) a+v[i]]; polygon(cumsum(p)); // Cheers, Steve On 2024-06-25 5:45 a.m., Raymond West via Discuss wrote: > > Here's the code, for the north facing wall, and a bit of the two > sides. Thanks for the help. (and ChatGPT, who got there in the end) > > > // points from wall distances >    n=[0,1];s=[0,-1];e=[1,0];w=[-1,0]; > p= > [e*0,w*8.5,s*38,w*5,w*95,w*110,w*50,w*4,n*37,w*75,n*7,w*44,s*8,w*52,w*62,w*70,w*39,w*69,w*43,s*90,e*726.5]; > > function build_new_list(p, new = [[0, 0]]) = >     len(new) > len(p) ? new : >     let (last = new[len(new) - 1], >          next = [last[0] + p[len(new) - 1][0], last[1] + p[len(new) - > 1][1]]) >          build_new_list(p, concat(new, [next])); > > >        new = build_new_list(p); >           echo(old=p); >          echo(new=new); > >          polygon(new); > //////////////////////////////////////////////////// > > On 25/06/2024 12:41, Raymond West via Discuss wrote: >> >> Thanks for all your replies.  I've decided to go with Steve'sidea "A >> quick and lazy way that I think would work" which at the moment suits >> me fine, except the summing of the elements is going to need a >> recursive function, at least, which tends to bother me. If I'm happy >> with it, I'll post the code. >> >> So far, excluding windows and doors, for the exterior of the >> building, there are about 60 points to play with, but later, once the >> proof of concept is completed, I will probably persuade ChatGPT to >> write some python code, or something, to simplify all the data entry. >> ChatGPT is OK at Python, at least for my purposes, but not so good >> with openscad, where it becomes a battle of wills. >> >> Best wishes, >> >> Ray >> >> >> _______________________________________________ >> OpenSCAD mailing list >> To unsubscribe send an email todiscuss-leave@lists.openscad.org > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email todiscuss-leave@lists.openscad.org -- https://www.gnomoni.ca https://www.youtube.com/@gnomonica

Just thought I'd update. just need to add roof-tiles, ridge-tiles, windows, doors, chimneys, gutters and downpipes. I need to get the height of the roof. Maybe jury rig a crude theodolite. Of course, the actual building is not exactly square, and combined with my crude measuring system, it was interesting. Not sure If I'll do much internal detail. On 25/06/2024 13:45, Raymond West via Discuss wrote: > > Here's the code, for the north facing wall, and a bit of the two > sides. Thanks for the help. (and ChatGPT, who got there in the end) > > > // points from wall distances >    n=[0,1];s=[0,-1];e=[1,0];w=[-1,0]; > p= > [e*0,w*8.5,s*38,w*5,w*95,w*110,w*50,w*4,n*37,w*75,n*7,w*44,s*8,w*52,w*62,w*70,w*39,w*69,w*43,s*90,e*726.5]; > > function build_new_list(p, new = [[0, 0]]) = >     len(new) > len(p) ? new : >     let (last = new[len(new) - 1], >          next = [last[0] + p[len(new) - 1][0], last[1] + p[len(new) - > 1][1]]) >          build_new_list(p, concat(new, [next])); > > >        new = build_new_list(p); >           echo(old=p); >          echo(new=new); > >          polygon(new); > //////////////////////////////////////////////////// > > On 25/06/2024 12:41, Raymond West via Discuss wrote: >> >> Thanks for all your replies.  I've decided to go with Steve'sidea "A >> quick and lazy way that I think would work" which at the moment suits >> me fine, except the summing of the elements is going to need a >> recursive function, at least, which tends to bother me. If I'm happy >> with it, I'll post the code. >> >> So far, excluding windows and doors, for the exterior of the >> building, there are about 60 points to play with, but later, once the >> proof of concept is completed, I will probably persuade ChatGPT to >> write some python code, or something, to simplify all the data entry. >> ChatGPT is OK at Python, at least for my purposes, but not so good >> with openscad, where it becomes a battle of wills. >> >> Best wishes, >> >> Ray >> >> >> _______________________________________________ >> OpenSCAD mailing list >> To unsubscribe send an email todiscuss-leave@lists.openscad.org > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email todiscuss-leave@lists.openscad.org