ModernUO/Projects/Scripts/Items/Shields/BaseShield.cs

using Server.Network;

namespace Server.Items
{
  public class BaseShield : BaseArmor
  {
    public BaseShield(int itemID) : base(itemID)
    {
    }

    public BaseShield(Serial serial) : base(serial)
    {
    }

    public override ArmorMaterialType MaterialType => ArmorMaterialType.Plate;

    public override double ArmorRating
    {
      get
      {
        Mobile m = Parent as Mobile;
        double ar = base.ArmorRating;

        if (m != null)
          return m.Skills.Parry.Value * ar / 200.0 + 1.0;
        return ar;
      }
    }

    public override void Serialize(GenericWriter writer)
    {
      base.Serialize(writer);

      writer.Write(1); //version
    }

    public override void Deserialize(GenericReader reader)
    {
      base.Deserialize(reader);

      int version = reader.ReadInt();

      if (version < 1)
      {
        if (this is Aegis)
          return;

        // The 15 bonus points to resistances are not applied to shields on OSI.
        PhysicalBonus = 0;
        FireBonus = 0;
        ColdBonus = 0;
        PoisonBonus = 0;
        EnergyBonus = 0;
      }
    }

    public override int OnHit(BaseWeapon weapon, int damage)
    {
      if (Core.AOS)
      {
        if (ArmorAttributes.SelfRepair > Utility.Random(10))
        {
          HitPoints += 2;
        }
        else
        {
          double halfArmor = ArmorRating / 2.0;
          int absorbed = (int)(halfArmor + halfArmor * Utility.RandomDouble());

          if (absorbed < 2)
            absorbed = 2;

          int wear;

          if (weapon.Type == WeaponType.Bashing)
            wear = absorbed / 2;
          else
            wear = Utility.Random(2);

          if (wear > 0 && MaxHitPoints > 0)
          {
            if (HitPoints >= wear)
            {
              HitPoints -= wear;
              wear = 0;
            }
            else
            {
              wear -= HitPoints;
              HitPoints = 0;
            }

            if (wear > 0)
            {
              if (MaxHitPoints > wear)
              {
                MaxHitPoints -= wear;

                if (Parent is Mobile mobile)
                  mobile.LocalOverheadMessage(MessageType.Regular, 0x3B2,
                    1061121); // Your equipment is severely damaged.
              }
              else
              {
                Delete();
              }
            }
          }
        }

        return 0;
      }

      if (!(Parent is Mobile owner))
        return damage;

      double ar = ArmorRating;
      double chance = (owner.Skills.Parry.Value - ar * 2.0) / 100.0;

      if (chance < 0.01)
        chance = 0.01;
      /*
      FORMULA: Displayed AR = ((Parrying Skill * Base AR of Shield) <20> 200) + 1

      FORMULA: % Chance of Blocking = parry skill - (shieldAR * 2)

      FORMULA: Melee Damage Absorbed = (AR of Shield) / 2 | Archery Damage Absorbed = AR of Shield
      */
      if (owner.CheckSkill(SkillName.Parry, chance))
      {
        if (weapon.Skill == SkillName.Archery)
          damage -= (int)ar;
        else
          damage -= (int)(ar / 2.0);

        if (damage < 0)
          damage = 0;

        owner.FixedEffect(0x37B9, 10, 16);

        if (25 > Utility.Random(100)) // 25% chance to lower durability
        {
          int wear = Utility.Random(2);

          if (wear > 0 && MaxHitPoints > 0)
          {
            if (HitPoints >= wear)
            {
              HitPoints -= wear;
              wear = 0;
            }
            else
            {
              wear -= HitPoints;
              HitPoints = 0;
            }

            if (wear > 0)
            {
              if (MaxHitPoints > wear)
              {
                MaxHitPoints -= wear;

                ((Mobile)Parent).LocalOverheadMessage(MessageType.Regular, 0x3B2,
                  1061121); // Your equipment is severely damaged.
              }
              else
              {
                Delete();
              }
            }
          }
        }
      }

      return damage;
    }
  }
}