0 - 1 Remapping Functions: Smooth Step

/* remapping functions */

for(i=[-0:1/160:1])translate([i,0])square([1/160, (smooth( (i),2/3,0.1))]);
    function smooth (a) =let (b = clamp(a))(b * b * (3 - 2 * b));
    function clamp(a, b = 0, c = 1) = min(max(a, b), c)