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* Experiment with replacing weakrefs in AI blackboard with deleting signals, ideally making it easier to work with and harder to cause hard deletes (#74791) ## About The Pull Request Replaces weakref usage in AI blackboards with deleting signals All blackboard var setting must go through setters rather than directly ## Why It's Good For The Game This both makes it a ton easier to develop AI for, and also makes it harder for hard deletes to sneak in, as has been seen with recent 515 prs showing hard deletes in AI blackboards (To quantify "making it easier to develop AI", I found multiple bugs in existing AI code due to the usage of weakrefs.) I'm looking for `@ Jacquerel` `@ tralezab` 's opinions on the matter, also maybe `@ LemonInTheDark` if they're interested ## Changelog 🆑 Melbert refactor: Mob ai refactored once again /🆑 * Experiment with replacing weakrefs in AI blackboard with deleting signals, ideally making it easier to work with and harder to cause hard deletes --------- Co-authored-by: MrMelbert <51863163+MrMelbert@users.noreply.github.com>
61 lines
2.6 KiB
Plaintext
61 lines
2.6 KiB
Plaintext
///This behavior is for obj/items, it is used to free themselves out of the hands of whoever is holding them
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/datum/ai_behavior/item_escape_grasp
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/datum/ai_behavior/item_escape_grasp/perform(seconds_per_tick, datum/ai_controller/controller)
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. = ..()
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var/obj/item/item_pawn = controller.pawn
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var/mob/item_holder = item_pawn.loc
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if(!istype(item_holder))
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finish_action(controller, FALSE) //We're no longer being held. abort abort!!
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item_pawn.visible_message(span_warning("[item_pawn] slips out of the hands of [item_holder]!"))
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item_holder.dropItemToGround(item_pawn, TRUE)
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finish_action(controller, TRUE)
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///This behavior is for obj/items, it is used to move closer to a target and throw themselves towards them.
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/datum/ai_behavior/item_move_close_and_attack
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required_distance = 3
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behavior_flags = AI_BEHAVIOR_REQUIRE_MOVEMENT
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action_cooldown = 20
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///Sound to use
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var/attack_sound
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///Max attemps to make
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var/max_attempts = 3
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/datum/ai_behavior/item_move_close_and_attack/setup(datum/ai_controller/controller, target_key, throw_count_key)
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. = ..()
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var/atom/target = controller.blackboard[target_key]
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if (isnull(target))
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return FALSE
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set_movement_target(controller, target)
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/datum/ai_behavior/item_move_close_and_attack/perform(seconds_per_tick, datum/ai_controller/controller, target_key, throw_count_key)
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. = ..()
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var/obj/item/item_pawn = controller.pawn
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var/atom/throw_target = controller.blackboard[target_key]
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item_pawn.visible_message(span_warning("[item_pawn] hurls towards [throw_target]!"))
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item_pawn.throw_at(throw_target, rand(4,5), 9)
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playsound(item_pawn.loc, attack_sound, 100, TRUE)
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controller.add_blackboard_key(throw_count_key, 1)
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if(controller.blackboard[throw_count_key] >= max_attempts)
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finish_action(controller, TRUE, target_key, throw_count_key)
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/datum/ai_behavior/item_move_close_and_attack/finish_action(datum/ai_controller/controller, succeeded, target_key, throw_count_key)
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. = ..()
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reset_blackboard(controller, succeeded, target_key, throw_count_key)
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/datum/ai_behavior/item_move_close_and_attack/proc/reset_blackboard(datum/ai_controller/controller, succeeded, target_key, throw_count_key)
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controller.clear_blackboard_key(target_key)
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controller.set_blackboard_key(throw_count_key, 0)
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/datum/ai_behavior/item_move_close_and_attack/ghostly
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attack_sound = 'sound/items/haunted/ghostitemattack.ogg'
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max_attempts = 4
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/datum/ai_behavior/item_move_close_and_attack/ghostly/haunted
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/datum/ai_behavior/item_move_close_and_attack/ghostly/haunted/finish_action(datum/ai_controller/controller, succeeded, target_key, throw_count_key)
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controller.add_blackboard_key_assoc(BB_TO_HAUNT_LIST, controller.blackboard[target_key], -1)
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return ..()
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