d=14.5;
h=50.9;
module aa(){
	rotate([90,0,0])
		cylinder(d=d,h=h,center=true,$fn=100);
	
}

module packAA(nb=4,level=2){
	n=round(nb/level);
	r=nb-(level-1)*n;
	l=(level-1)/2;
	t=(n-1)/2;
	z=0;
	t2=(r-1)/2;
	translate([0,0,d/2]){
		rotate([0,90,0]){
			if(t2!=t){
				for(z=[0:1:level-2]){
					translate([-d*0.86-d*z-0.1,0,0])
						for(x=[-t:1:t])
							translate([0,0,x*(d+0.1)])
								aa();
				}		
			}
			else{
				for(z=[0:1:level-2]){
					translate([-d-d*z-0.1,0,0])
						for(x=[-t:1:t])
							translate([0,0,x*(d+0.1)])
								aa();
				}
			}		
			for(x=[-t2:1:t2])
				translate([0,0,x*(d+0.1)])
					aa();
		}
	}
}

packAA();
/*
module t(c=5,t=2){
	for (i=[0:c],a=2*i){
		echo(i,a,b);
		}
}
t();
*/