private Change CalcChange(ModificationParameter parameter,
float amount,
CharacterState sourceCharacter,
ISubSpellHandler subSpell)
{
// Zero-change
if (parameter == ModificationParameter.None || Mathf.Abs(amount) < 1e-6)
{
return new Change
{
Parameter = ModificationParameter.None,
Amount = 0
}
}
;
if (parameter == ModificationParameter.HpFlat || parameter == ModificationParameter.HpMult)
{
var targetHp = _hp;
if (parameter == ModificationParameter.HpFlat)
{
targetHp += amount;
}
if (parameter == ModificationParameter.HpMult)
{
targetHp *= amount;
}
targetHp = Mathf.Min(targetHp, MaxHealth);
var delta = targetHp - _hp;
// If taking damage
if (delta < 0)
{
// If the damage comes from spell, amplify it buy character source damage multiplier
if (subSpell != null && sourceCharacter != null)
{
// Damage amplification
delta *= sourceCharacter.SpellDamageMultiplier;
#if DEBUG_COMBAT
_combatLog.Log(
$"Receiving in total <b>{-delta}</b> spell multiplied ({100 * sourceCharacter.SpellDamageMultiplier}%) damage from <b>{sourceCharacter.name}</b> " +
$"from spell <b>{subSpell.Spell.name}</b>");
#endif
// Lifesteal
// TODO: Shouldn't we apply lifesteal afterwards?
var lifeStealFactor = subSpell.Spell.LifeSteal.GetValue(subSpell.Stacks);
var hpStolen = -delta * lifeStealFactor;
if (hpStolen > 0)
{
#if DEBUG_COMBAT
_combatLog.Log(
$"Returning <b>{hpStolen}</b> hp back to <b>{sourceCharacter.name}</b> " +
$"because spell <b>{subSpell.Spell.name}</b> has <b>{100 * lifeStealFactor}%</b> lifesteal");
#endif
sourceCharacter.ApplyModifier(ModificationParameter.HpFlat,
hpStolen,
this,
subSpell);
}
}
}
// Notice that we are returning HpFlat even if the original modifier was HpMult.
// Because there was some additional modifer applied to damage (if any)
return(new Change
{
Parameter = ModificationParameter.HpFlat,
Amount = delta
});
}
switch (parameter)
{
case ModificationParameter.CritChanceFlat:
case ModificationParameter.EvasionChanceFlat:
return(new Change
{
Parameter = parameter,
Amount = 1 - amount
});
}
// Default change computation for stats like speed and other relatively simple stats
return(new Change
{
Parameter = parameter,
Amount = amount
});
}