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69f21ff997
## About The Pull Request Flamethrower exploding when shot was handled by hit_reaction previously, and will now use the generic bullet_intercepting component. Also adds handling for multiple projectile types in the bullet_intercepting component, as well as a check for whether the object currently can block bullets. Should have no gameplay changes. ## Why It's Good For The Game closes #81863 , they said it'd be better consistency
81 lines
2.8 KiB
Plaintext
81 lines
2.8 KiB
Plaintext
/**
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* Component which allows an equipped item to occasionally absorb a projectile.
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*/
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/datum/component/bullet_intercepting
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/// Chance to intercept a projectile
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var/block_chance
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/// List of types of bullets to intercept
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var/list/block_type
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/// Slots in which effect can be active
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var/active_slots
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/// Person currently wearing us
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var/mob/wearer
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/// Callback called when we catch a projectile
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var/datum/callback/on_intercepted
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/// Number of things we can block before we delete ourself (stop being able to block)
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var/block_charges = INFINITY
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/// Callback to check if the object is currently able to block
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var/datum/callback/is_blocking_check
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/datum/component/bullet_intercepting/Initialize(block_chance = 2, list/block_type = list(BULLET), active_slots, datum/callback/on_intercepted, block_charges = INFINITY, datum/callback/is_blocking_check = null)
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. = ..()
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if (!isitem(parent))
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return COMPONENT_INCOMPATIBLE
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src.block_chance = block_chance
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src.block_type = block_type
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src.active_slots = active_slots
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src.on_intercepted = on_intercepted
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src.block_charges = block_charges
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src.is_blocking_check = is_blocking_check
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RegisterSignal(parent, COMSIG_ITEM_EQUIPPED, PROC_REF(on_parent_equipped))
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RegisterSignal(parent, COMSIG_ITEM_PRE_UNEQUIP, PROC_REF(on_unequipped))
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/datum/component/bullet_intercepting/Destroy(force)
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wearer = null
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on_intercepted = null
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return ..()
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/// Called when item changes slots, check if we're in a valid location to take bullets
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/datum/component/bullet_intercepting/proc/on_parent_equipped(obj/item/clothing/source, mob/equipper, slot)
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SIGNAL_HANDLER
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if (wearer)
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if (!(active_slots & slot))
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on_unequipped()
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return
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if (!(active_slots & slot))
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return
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RegisterSignal(equipper, COMSIG_PROJECTILE_PREHIT, PROC_REF(on_wearer_shot))
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RegisterSignal(equipper, COMSIG_QDELETING, PROC_REF(on_wearer_deleted))
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wearer = equipper
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/// Called when item is unequipped, stop tracking bullets
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/datum/component/bullet_intercepting/proc/on_unequipped()
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SIGNAL_HANDLER
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if (!wearer)
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return
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UnregisterSignal(wearer, list(COMSIG_PROJECTILE_PREHIT, COMSIG_QDELETING))
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wearer = null
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/// Called when wearer is shot, check if we're going to block the hit
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/datum/component/bullet_intercepting/proc/on_wearer_shot(mob/living/victim, obj/projectile/bullet)
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SIGNAL_HANDLER
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if(!isnull(is_blocking_check) && !is_blocking_check.Invoke())
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return NONE
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if (victim != wearer || victim.stat == DEAD || !prob(block_chance))
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return NONE
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for (var/blocktype in block_type)
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if (bullet.armor_flag == blocktype)
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on_intercepted?.Invoke(victim, bullet)
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block_charges--
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if (block_charges <= 0)
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qdel(src)
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return PROJECTILE_INTERRUPT_HIT
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return NONE
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/// Called when wearer is deleted, stop tracking them
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/datum/component/bullet_intercepting/proc/on_wearer_deleted()
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SIGNAL_HANDLER
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wearer = null
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