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Bane refactor (now uses damage multipliers) (#96003)
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MrMelbert
@@ -0,0 +1,199 @@
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/**
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* ## Bane component
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*
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* Applied to items and projectiles that modifies damage dealt to certain things.
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* For example a sword that deals 2x damage to specifically skeletons.
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*
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* For items, you are not limited to only dealing more damage. Supports smaller multipliers or removing flat damage.
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* For projectiles, you are limited to only dealing more damage, at least until further refactors are done.
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*/
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/datum/component/bane
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dupe_mode = COMPONENT_DUPE_ALLOWED
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/// Callback invoked when checking if a target is valid to be baned (arguments: target)
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/// Return a boolean, FALSE to stop the bane effect or TRUE to allow it
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VAR_FINAL/datum/callback/should_bane_callback
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/// Callback invoked before bane damage is applied, allows for modifying the damage or applying other effects. (arguments: target, attacker, damage_modifiers)
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/// Return value doesn't matter, but you can modify the damage_modifiers list to change the attack's values
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VAR_FINAL/datum/callback/pre_bane_callback
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/// Callback invoked after bane damage is applied, allows for applying other effects. (arguments: target, attacker)
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/// Return value doesn't matter
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VAR_FINAL/datum/callback/on_bane_callback
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/// A bitfield of mob biotypes that this bane component applies to.
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///If NONE, applies to all biotypes. Defaults to NONE.
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VAR_FINAL/affected_biotypes = NONE
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/// Multiplier applied to damage when the bane effect applies. Defaults to 1 (no change).
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VAR_FINAL/damage_multiplier = 1
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/// Flat damage added when the bane effect applies. Defaults to 0 (no change).
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VAR_FINAL/added_damage = 0
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/// Optional text to show in the weapon label readout, if not set it will generate a generic one based on the biotypes
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VAR_FINAL/label_text = ""
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/datum/component/bane/Initialize(
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damage_multiplier = 1,
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added_damage = 0,
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affected_biotypes = NONE,
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datum/callback/should_bane_callback,
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datum/callback/pre_bane_callback,
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datum/callback/on_bane_callback,
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label_text = "",
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)
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if(!isitem(parent) && !isprojectile(parent))
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return COMPONENT_INCOMPATIBLE
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src.damage_multiplier = damage_multiplier
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src.added_damage = added_damage
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src.affected_biotypes = affected_biotypes
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src.should_bane_callback = should_bane_callback
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src.pre_bane_callback = pre_bane_callback
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src.on_bane_callback = on_bane_callback
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src.label_text = label_text
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/datum/component/bane/RegisterWithParent()
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if(isitem(parent))
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RegisterSignal(parent, COMSIG_ITEM_WEAPON_LABEL_READOUT, PROC_REF(label_readout))
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RegisterSignal(parent, COMSIG_ITEM_PRE_ATTACK, PROC_REF(pre_attack))
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RegisterSignal(parent, COMSIG_ITEM_AFTERATTACK, PROC_REF(after_attack))
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RegisterSignal(parent, COMSIG_MOVABLE_IMPACT_ZONE, PROC_REF(on_thrown_hit))
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if(isprojectile(parent))
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RegisterSignal(parent, COMSIG_PROJECTILE_SELF_ON_HIT, PROC_REF(projectile_hit))
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/datum/component/bane/UnregisterFromParent()
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if(isitem(parent))
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UnregisterSignal(parent, COMSIG_ITEM_WEAPON_LABEL_READOUT)
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UnregisterSignal(parent, COMSIG_ITEM_PRE_ATTACK)
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UnregisterSignal(parent, COMSIG_ITEM_AFTERATTACK)
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UnregisterSignal(parent, COMSIG_MOVABLE_IMPACT_ZONE)
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if(isprojectile(parent))
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UnregisterSignal(parent, COMSIG_PROJECTILE_SELF_ON_HIT)
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/datum/component/bane/proc/is_bane_target(atom/target)
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if(!isliving(target))
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return FALSE
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var/mob/living/living_target = target
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if(affected_biotypes && !(living_target.mob_biotypes & affected_biotypes))
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return FALSE
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return isnull(should_bane_callback) ? TRUE : should_bane_callback.Invoke(target)
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/datum/component/bane/proc/label_readout(obj/item/source, list/readout)
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SIGNAL_HANDLER
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if(damage_multiplier == 1 && added_damage == 0 && !label_text)
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return
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var/label_line = ""
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if(damage_multiplier > 1 || added_damage > 0)
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label_line += "It is especially effective against"
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else if(damage_multiplier < 1 || added_damage < 0)
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label_line += "It is less effective against"
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else
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label_line += "It interacts uniquely with" // for custom behaviors?
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label_line += " "
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if(label_text)
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label_line += label_text
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else if(affected_biotypes)
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var/list/affected_biotypes_readable = bitfield_to_list(affected_biotypes, MOB_BIOTYPES_READABLE)
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label_line += "[english_list(affected_biotypes_readable)] enemies"
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else
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label_line += "certain enemies"
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if(damage_multiplier > 1 || added_damage > 0)
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var/magnitude = ""
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switch(max(damage_multiplier, added_damage / 10))
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if(3 to INFINITY)
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magnitude = "massively increased"
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if(2 to 3)
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magnitude = "greatly increased"
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if(1.5 to 2)
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magnitude = "significantly increased"
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if(1 to 1.5)
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magnitude = "slightly increased"
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label_line += ", dealing [span_warning(magnitude)] damage per hit"
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else if(damage_multiplier < 1 || added_damage < 0)
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var/magnitude = ""
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switch(min(damage_multiplier, 10 / abs(added_damage || 1)))
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if(-INFINITY to 0)
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magnitude = "no"
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if(0 to 0.3)
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magnitude = "massively reduced"
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if(0.3 to 0.6)
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magnitude = "greatly reduced"
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if(0.6 to 0.9)
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magnitude = "significantly reduced"
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if(0.9 to 1)
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magnitude = "slightly reduced"
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label_line += ", dealing [span_warning(magnitude)] damage per hit"
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label_line += "."
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readout += label_line
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// Item attack handling
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/datum/component/bane/proc/pre_attack(datum/source, atom/target, mob/living/attacker, list/modifiers, list/attack_modifiers)
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SIGNAL_HANDLER
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if(!is_bane_target(target))
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return
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if(added_damage != 0)
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MODIFY_ATTACK_FORCE(attack_modifiers, added_damage)
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if(damage_multiplier != 1)
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MODIFY_ATTACK_FORCE_MULTIPLIER(attack_modifiers, damage_multiplier)
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pre_bane_callback?.Invoke(target, attacker, attack_modifiers)
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/datum/component/bane/proc/after_attack(datum/source, atom/target, mob/living/attacker, ...)
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SIGNAL_HANDLER
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if(!is_bane_target(target))
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return
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SEND_SIGNAL(target, COMSIG_LIVING_BANED, source, attacker)
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on_bane_callback?.Invoke(target, attacker)
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// Throw impact handling
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/datum/component/bane/proc/on_thrown_hit(datum/source, atom/hit_atom, hit_zone, blocked, datum/thrownthing/throwingdatum)
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SIGNAL_HANDLER
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if(!is_bane_target(hit_atom))
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return
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var/mob/thrower = throwingdatum?.thrower?.resolve()
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var/list/damage_modifiers = list("[FORCE_MULTIPLIER]" = damage_multiplier, "[FORCE_MODIFIER]" = added_damage)
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pre_bane_callback?.Invoke(hit_atom, thrower, damage_modifiers)
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// We're not modifying the throwforce of the item we're just applying more damage as a separate damage event
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// That's why we do damage_multiplier - 1 (so that a 1.5x multiplier would apply 0.5x damage here for a total of 1.5x)
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var/obj/item/throwing_item = parent
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var/extra_damage = (throwing_item.throwforce * max(0, damage_modifiers[FORCE_MULTIPLIER] - 1)) + damage_modifiers[FORCE_MODIFIER]
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if(extra_damage > 0)
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var/mob/living/living_target = hit_atom // safe assertion from is_bane_target
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living_target.apply_damage(extra_damage, throwing_item.damtype, hit_zone, blocked)
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SEND_SIGNAL(hit_atom, COMSIG_LIVING_BANED, thrower, hit_atom)
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on_bane_callback?.Invoke(hit_atom, thrower)
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// Projectile hit handling
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/datum/component/bane/proc/projectile_hit(datum/source, atom/firer, atom/target, angle, hit_zone, blocked, ...)
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SIGNAL_HANDLER
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if(!is_bane_target(target))
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return
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var/list/damage_modifiers = list("[FORCE_MULTIPLIER]" = damage_multiplier, "[FORCE_MODIFIER]" = added_damage)
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pre_bane_callback?.Invoke(target, firer, damage_modifiers)
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// We're not modifying the projectile damage we're just applying more damage as a separate damage event
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// That's why we do damage_multiplier - 1 (so that a 1.5x multiplier would apply 0.5x damage here for a total of 1.5x)
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var/obj/projectile/projectile_owner = parent
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var/extra_damage = (projectile_owner.damage * max(0, damage_modifiers[FORCE_MULTIPLIER] - 1)) + damage_modifiers[FORCE_MODIFIER]
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if(extra_damage > 0)
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var/mob/living/living_target = target // safe assertion from is_bane_target
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living_target.apply_damage(extra_damage, projectile_owner.damage_type, hit_zone, blocked)
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SEND_SIGNAL(target, COMSIG_LIVING_BANED, firer, target)
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on_bane_callback?.Invoke(target, firer)
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@@ -58,7 +58,6 @@
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name = "of <mobtype> slaying (random species, carbon or simple animal)"
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placement = AFFIX_SUFFIX
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alignment = AFFIX_GOOD
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var/list/target_types_by_comp = list()
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/datum/fantasy_affix/bane/apply(datum/component/fantasy/comp, newName)
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. = ..()
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@@ -83,16 +82,9 @@
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// This works even with the species picks since we're only accessing the name
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var/obj/item/master = comp.parent
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master.AddElement(/datum/element/bane, target_type = picked_mobtype)
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target_types_by_comp[comp] = picked_mobtype
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comp.appliedComponents += master.AddComponent(/datum/component/bane, affected_biotypes = picked_mobtype, damage_multiplier = 2)
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return "[newName] of [initial(picked_mobtype.name)] slaying"
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/datum/fantasy_affix/bane/remove(datum/component/fantasy/comp)
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var/picked_mobtype = target_types_by_comp[comp]
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var/obj/item/master = comp.parent
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master.RemoveElement(/datum/element/bane, picked_mobtype)
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target_types_by_comp -= comp
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/datum/fantasy_affix/summoning
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name = "of <mobtype> summoning (dangerous, can pick all but megafauna tier stuff)"
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placement = AFFIX_SUFFIX
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