Basic position holding class.

vector2.js

// basic position class, holds x and y coordinates and utility functions
function Vector2(x, y) {
	this.x = x;
	this.y = y;
	
	this.add = function(other) {
		return new Vector2(this.x + other.x, this.y + other.y);
	};
	
	this.distance = function(pos) {
		var dx = pos.x - this.x;
		var dy = pos.y - this.y;
		
		return Math.abs(Math.sqrt((dx * dx) + (dy * dy)));
	};
	
	this.manhattan = function(pos) {
		return(Math.abs(this.x - pos.x) + Math.abs(this.y - pos.y));
	};
	
	this.clone = function() {
		return(new Vector2(this.x, this.y));
	};
	
	this.toString = function() {
		return("(" + this.x + ", " + this.y + ")");
	};
}