Awesome
hx-vector2d 
Worlds most complete Vector2d / Point class for Haxe. With operator overloading.
var p1:Vector2d = new Vector2d(10, 20);
var p2:Vector2d = {x: 10.0, y: 30.0};
// same as `var p3 = p1.add(p2);`, same as `var p3 = {x: p1.x + p2.x, y:p1.y + p2.y}`
var p3 = p1 + p2;
trace(p3); // p3 = {x: 20.0, y: 50.0}
// x*x + y*y
trace(p3.length); // 2900
// same as Math.sqrt(p3.length)
trace(p3.magnitude); // 53.85164807134504
// From array is also possible
var p4:Vector2d = [0.2, 0.3];