IntVector2.cs

[System.Serializable]
public struct IntVector2 {

	public int x, y;

	public IntVector2 (int x, int y) {
		this.x = x;
		this.y = y;
	}

	public static IntVector2 operator + (IntVector2 a, IntVector2 b) {
		a.x += b.x;
		a.y += b.y;
		return a;
	}

	public override string ToString ()
	{
		return string.Format ("({0}, {1})", x, y);
	}
}