Hilbert in 100Hex

I have modified the original scad file from https://www.thingiverse.com/thing:65572 to improve the corners, being able to choose between square or rounded.
Also allows to insert the curve inside a hexagon to adapt it to the project 100Hex
https://www.thingiverse.com/thing:2477471

corner=0; // -> rounded corner=1; ->square

module line(l,w)
{
if (corner==0){
union(){
translate ([-l/2, 0, 0]) circle (w/2,center=true, $fn=24);
square ([l,w],center=true);
translate ([l/2, 0, 0]) circle (w/2,center=true, $fn=24);
}
}
if (corner==1){
union(){
translate ([-l/2, 0, 0]) square (w,center=true);
square ([l,w],center=true);
translate ([l/2, 0, 0]) square (w,center=true);
}
}
}