code: function( pointA, pointB ) {
  
  	        return { x: pointB.x - pointA.x, y: -( pointB.y - pointA.y ) };
  	    }
docs: Creates a vector given its origin and destiny points
  @param  {Vector} pointA - vector origin
  @param  {Vector} pointB - vector point
  @return {Vector}        Resulting vector