getParameter( point, target ) {

		// This can potentially have a divide by zero if the box
		// has a size dimension of 0.

		return target.set(
			( point.x - this.min.x ) / ( this.max.x - this.min.x ),
			( point.y - this.min.y ) / ( this.max.y - this.min.y )
		);

	}
Returns a point as a proportion of this box's width and height.

@param {Vector2} point - A point in 2D space.
@param {Vector2} target - The target vector that is used to store the method's result.
@return {Vector2} A point as a proportion of this box's width and height.