Works fine with F5 but not with F6.  Seems like a simple difference() to me (obscured by quite a few modules).  Any thoughts?  See attached Error.scad.

Note that the error appears the first time you press F6, but not thereafter.  If you flush the cache, you get to see the error message again On 10/23/2022 12:10 PM, jon wrote: > Works fine with F5 but not with F6.  Seems like a simple difference() > to me (obscured by quite a few modules).  Any thoughts?  See attached > Error.scad. > > > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org

Maybe the BigShape2D(di) polygon should be made with the points list rather than matching various shapes. On Sun, 23 Oct 2022 at 21:43, jon <jon@jonbondy.com> wrote: > Note that the error appears the first time you press F6, but not > thereafter. If you flush the cache, you get to see the error message again > > On 10/23/2022 12:10 PM, jon wrote: > > Works fine with F5 but not with F6. Seems like a simple difference() > > to me (obscured by quite a few modules). Any thoughts? See attached > > Error.scad. > > > > > > > > _______________________________________________ > > OpenSCAD mailing list > > To unsubscribe send an email to discuss-leave@lists.openscad.org > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >

rotate_extrude() {
    square([3, 1]);
	translate([2, 1])
		square([1, 1]);
	square([1, 2]);
}
translate([-100,0,0]) cube();

square([3, 1]);
translate([2, 1])
    square([1, 1]);
square([1, 2]);

The first step in such a thing is to figure out exactly what's causing the problem.  If you think it's a bug, continue doing that until you get to a program where removing anything makes the problem go away. Here's a minimal program that demonstrates the problem: rotate_extrude() { square([3, 1]); translate([2, 1]) square([1, 1]); square([1, 2]); } translate([-100,0,0]) cube(); This appears to be a bug in the 2D subsystem that is then leading to CGAL problems. Looking at just the 2D object, with F6, is illuminating: square([3, 1]); translate([2, 1]) square([1, 1]); square([1, 2]); Notice that the top-right square, the second one created, is not connected to the others.  Strangely, removing the left-hand one causes the right-hand one to be connected. A workaround is to make the right-hand square start at Y=0 and be 8 tall instead of 6.

Yes I have come across a few bugs in 2D operations like that. Better to make it with a difference. On Sun, 23 Oct 2022 at 19:30, Jordan Brown <openscad@jordan.maileater.net> wrote: > The first step in such a thing is to figure out exactly what's causing the > problem. If you think it's a bug, continue doing that until you get to a > program where removing anything makes the problem go away. > > Here's a minimal program that demonstrates the problem: > > rotate_extrude() { > square([3, 1]); > translate([2, 1]) > square([1, 1]); > square([1, 2]); > } > translate([-100,0,0]) cube(); > > This appears to be a bug in the 2D subsystem that is then leading to CGAL > problems. > > Looking at just the 2D object, with F6, is illuminating: > > square([3, 1]); > translate([2, 1]) > square([1, 1]); > square([1, 2]); > > Notice that the top-right square, the second one created, is not connected > to the others. Strangely, removing the left-hand one causes the right-hand > one to be connected. > > A workaround is to make the right-hand square start at Y=0 and be 8 tall > instead of 6. > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >

this one works perfectly On Sun, 23 Oct 2022 at 23:33, Sanjeev Prabhakar <sprabhakar2006@gmail.com> wrote: > Maybe the BigShape2D(di) polygon should be made with the points list > rather than matching various shapes. > > On Sun, 23 Oct 2022 at 21:43, jon <jon@jonbondy.com> wrote: > >> Note that the error appears the first time you press F6, but not >> thereafter. If you flush the cache, you get to see the error message >> again >> >> On 10/23/2022 12:10 PM, jon wrote: >> > Works fine with F5 but not with F6. Seems like a simple difference() >> > to me (obscured by quite a few modules). Any thoughts? See attached >> > Error.scad. >> > >> > >> > >> > _______________________________________________ >> > OpenSCAD mailing list >> > To unsubscribe send an email to discuss-leave@lists.openscad.org >> _______________________________________________ >> OpenSCAD mailing list >> To unsubscribe send an email to discuss-leave@lists.openscad.org >> >