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f54dcda1c0
Necessary for #72292 to work effectively, and probably not very useful out of that context. Split out of its own PR because this is long and boring. I want to make sure that we're catching actual mistakes there, and not just experiencing side effects of how shitty the attack chain is.
74 lines
2.7 KiB
Plaintext
74 lines
2.7 KiB
Plaintext
/**
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* Mobs and items with this element will knock movable targets they hit away from them.
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* Guns and turrets will instead fire projectiles with similar effects.
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*/
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/datum/element/knockback
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/// distance the atom will be thrown
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var/throw_distance
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/// whether this can throw anchored targets (tables, etc)
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var/throw_anchored
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/// whether this is a gentle throw (default false means people thrown into walls are stunned / take damage)
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var/throw_gentle
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/datum/element/knockback/Attach(datum/target, throw_distance = 1, throw_anchored = FALSE, throw_gentle = FALSE)
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. = ..()
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if(ismachinery(target) || isstructure(target) || isgun(target) || isprojectilespell(target)) // turrets, etc
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RegisterSignal(target, COMSIG_PROJECTILE_ON_HIT, PROC_REF(projectile_hit))
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else if(isitem(target))
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RegisterSignal(target, COMSIG_ITEM_AFTERATTACK, PROC_REF(item_afterattack))
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else if(ishostile(target))
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RegisterSignal(target, COMSIG_HOSTILE_POST_ATTACKINGTARGET, PROC_REF(hostile_attackingtarget))
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else
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return ELEMENT_INCOMPATIBLE
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src.throw_distance = throw_distance
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src.throw_anchored = throw_anchored
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src.throw_gentle = throw_gentle
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/datum/element/knockback/Detach(datum/source)
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UnregisterSignal(source, list(COMSIG_ITEM_AFTERATTACK, COMSIG_HOSTILE_POST_ATTACKINGTARGET, COMSIG_PROJECTILE_ON_HIT))
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return ..()
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/// triggered after an item attacks something
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/datum/element/knockback/proc/item_afterattack(obj/item/source, atom/target, mob/user, proximity_flag, click_parameters)
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SIGNAL_HANDLER
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if(!proximity_flag)
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return
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do_knockback(target, user, get_dir(source, target))
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return COMPONENT_AFTERATTACK_PROCESSED_ITEM
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/// triggered after a hostile simplemob attacks something
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/datum/element/knockback/proc/hostile_attackingtarget(mob/living/simple_animal/hostile/attacker, atom/target, success)
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SIGNAL_HANDLER
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if(!success)
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return
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do_knockback(target, attacker, get_dir(attacker, target))
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/// triggered after a projectile hits something
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/datum/element/knockback/proc/projectile_hit(datum/fired_from, atom/movable/firer, atom/target, Angle)
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SIGNAL_HANDLER
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do_knockback(target, null, angle2dir(Angle))
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/**
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* Throw a target in a direction
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*
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* Arguments:
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* * target - Target atom to throw
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* * thrower - Thing that caused this atom to be thrown
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* * throw_dir - Direction to throw the atom
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*/
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/datum/element/knockback/proc/do_knockback(atom/target, mob/thrower, throw_dir)
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if(!ismovable(target) || throw_dir == null)
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return
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var/atom/movable/throwee = target
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if(throwee.anchored && !throw_anchored)
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return
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if(throw_distance < 0)
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throw_dir = turn(throw_dir, 180)
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throw_distance *= -1
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var/atom/throw_target = get_edge_target_turf(throwee, throw_dir)
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throwee.safe_throw_at(throw_target, throw_distance, 1, thrower, gentle = throw_gentle)
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