x(0,2*o*(r+a)-(r-=a)*r-o*o))/(2*a);e.x=n.x+c*u+s*i,e.y=n.y+c*i-s*u}else e.x=n.x+r,e.y=n.y}function Ai(n){return 1+Xo.max(n,function(n){return n.y})}function Ci(n){return n.reduce(function(n,t){return n+t.x},0)/n.length}function Ni(n){var t=n.children;return t&&t.length?Ni(t[0]):n}function Li(n){var t,e=n.children;return e&&(t=e.length)?Li(e[t-1]):n}function Ti(n){return{x:n.x,y:n.y,dx:n.dx,dy:n.dy}}function qi(n,t){var e=n.x+t[3],r=n.y+t[0],u=n.dx-t[1]-t[3],i=n.dy-t[0]-t[2];return 0>u&&(e+=u/2,u...