0 - 1 Remapping Functions: Arc 2

/* remapping functions */

for(i=[-0:1/160:1])translate([i,0])square([1/160,  (arc2(  (i)))]);
function arc2 (x,n=0) =
     let(a= n>0? arc2(x,(n-1)):x) clamp( 1-sqrt(1-(a)*(a)));    
function clamp(a, b = 0, c = 1) = min(max(a, b), c);