/// <summary>
/// Calculates the amount of damage a shield absorbs from magic projectile
/// </summary>
public float GetShieldMod(Creature target)
{
// ensure combat stance
if (target.CombatMode == CombatMode.NonCombat)
{
return(1.0f);
}
// does the player have a shield equipped?
var shield = target.GetEquippedShield();
if (shield == null || shield.GetProperty(PropertyFloat.AbsorbMagicDamage) == null)
{
return(1.0f);
}
// is spell projectile in front of player,
// within shield effectiveness area?
var effectiveAngle = 180.0f;
var angle = target.GetAngle(this);
if (Math.Abs(angle) > effectiveAngle / 2.0f)
{
return(1.0f);
}
// https://asheron.fandom.com/wiki/Shield
// The formula to determine magic absorption for shields is:
// Reduction Percent = (cap * specMod * baseSkill * 0.003f) - (cap * specMod * 0.3f)
// Cap = Maximum reduction
// SpecMod = 1.0 for spec, 0.8 for trained
// BaseSkill = 100 to 433 (above 433 base shield you always achieve the maximum %)
var shieldSkill = target.GetCreatureSkill(Skill.Shield);
// ensure trained?
if (shieldSkill.AdvancementClass < SkillAdvancementClass.Trained || shieldSkill.Base < 100)
{
return(1.0f);
}
var baseSkill = Math.Min(shieldSkill.Base, 433);
var specMod = shieldSkill.AdvancementClass == SkillAdvancementClass.Specialized ? 1.0f : 0.8f;
var cap = (float)(shield.GetProperty(PropertyFloat.AbsorbMagicDamage) ?? 0.0f);
// speced, 100 skill = 0%
// trained, 100 skill = 0%
// speced, 200 skill = 30%
// trained, 200 skill = 24%
// speced, 300 skill = 60%
// trained, 300 skill = 48%
// speced, 433 skill = 100%
// trained, 433 skill = 80%
var reduction = (cap * specMod * baseSkill * 0.003f) - (cap * specMod * 0.3f);
var shieldMod = 1.0f - reduction;
return(shieldMod);
}
