module rounded_ngon(num, r, rounding = 0) {
  function v(a) = let (d = 360/num, v = floor((a+d/2)/d)*d) (r-rounding) * [cos(v), sin(v)];
  polygon([for (a=[0:360-1]) v(a) + rounding*[cos(a),sin(a)]]);
}

//rounded_ngon(5, 100, 50);

module ngon( num, r) {
  polygon( [for ( i = [0:num-1], a=i*360/num) [ r*cos(a), r*sin(a) ] ]);
}
for( i = [0:100]) {
	translate([i,0,0])
		rotate([0,90,0])
		ngon( 360, 1);
}