Visitor Pattern for Damage key methods excerpt

Vehicle.cs

protected override void OnCollisionEnter2D(Collision2D col)
	{
		DamageVisitor damager = col.gameObject.GetComponent<DamageVisitor>();
		DamageVisitable damagable = gameObject.GetComponent<DamageVisitable>();
		damagable.AcceptDamageFrom(damager);
	}

	public override void AcceptDamageFrom(DamageVisitor damager)
	{
		int damageAmount = damager.CauseDamageTo(this);
		health -= damageAmount;
	}

	public override int CauseDamageTo(DamageVisitable damagable)
	{
		return 0;
	}