I'm bumping into another limit - for long lists of points the following fails with WARNING: Bad range parameter in for statement: too many elements (12288), in file lsystem.scad, line 69 module path(points,width,closed=false) { r=width/2; for (i=[0:len(points)-2]) { hull() { translate(points[i]) circle(r); translate(points[i+1]) circle(r); } } if (closed) { hull() { translate(points[len(points)-1]) circle(r); translate(points[0]) circle(r); } } }; A workaround is to replace the range with a vector in the for statement: for (i=to_n(len(points)-2)) where function to_n(n) = [for (i=0;i<=n;i=i+1) i]; but this seems clumsy Any other ways to get past this limit - I believe it's 9999 ? Kit -- Sent from: http://forum.openscad.org/

Another workaround is to use a nested loop. This is hardcoded in OpenSCAD in about half a dozen places. I should either be a preference of a much higher value. 10000 elements in a list is nothing on today's hardware. 10000 3D CSG operations on the other hand will bring CGAL to its knees. On Tue, 15 Oct 2019 at 10:07, kitwallace <kit.wallace@gmail.com> wrote: > I'm bumping into another limit - for long lists of points the following > fails > with > > WARNING: Bad range parameter in for statement: too many elements (12288), > in > file lsystem.scad, line 69 > > module path(points,width,closed=false) { > r=width/2; > for (i=[0:len(points)-2]) { > hull() { > translate(points[i]) circle(r); > translate(points[i+1]) circle(r); > } > } > if (closed) { > hull() { > translate(points[len(points)-1]) > circle(r); > translate(points[0]) > circle(r); > } > } > }; > > A workaround is to replace the range with a vector in the for statement: > > for (i=to_n(len(points)-2)) > > where > > function to_n(n) = [for (i=0;i<=n;i=i+1) i]; > > but this seems clumsy > Any other ways to get past this limit - I believe it's 9999 ? > > Kit > > > > -- > Sent from: http://forum.openscad.org/ > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >

Yes I think the 10000 limit comes from the days when 2D was done with CGAL and there were no list comprehensions, so everything was slow. On Tue, 15 Oct 2019 at 10:56, kitwallace <kit.wallace@gmail.com> wrote: > Although 2D CSG is really fast - 16,000 hull() operations in less than a > minute with the DXF output destined for laser engraving. > > > > > -- > Sent from: http://forum.openscad.org/ > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >

Although 2D CSG is really fast - 16,000 hull() operations in less than a minute with the DXF output destined for laser engraving. -- Sent from: http://forum.openscad.org/