/
knockback.dm
73 lines (63 loc) · 2.71 KB
/
knockback.dm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
/**
* Mobs and items with this element will knock movable targets they hit away from them.
* Guns and turrets will instead fire projectiles with similar effects.
*/
/datum/element/knockback
/// distance the atom will be thrown
var/throw_distance
/// whether this can throw anchored targets (tables, etc)
var/throw_anchored
/// whether this is a gentle throw (default false means people thrown into walls are stunned / take damage)
var/throw_gentle
/datum/element/knockback/Attach(datum/target, throw_distance = 1, throw_anchored = FALSE, throw_gentle = FALSE)
. = ..()
if(ismachinery(target) || isstructure(target) || isgun(target) || isprojectilespell(target)) // turrets, etc
RegisterSignal(target, COMSIG_PROJECTILE_ON_HIT, PROC_REF(projectile_hit))
else if(isitem(target))
RegisterSignal(target, COMSIG_ITEM_AFTERATTACK, PROC_REF(item_afterattack))
else if(ishostile(target))
RegisterSignal(target, COMSIG_HOSTILE_POST_ATTACKINGTARGET, PROC_REF(hostile_attackingtarget))
else
return ELEMENT_INCOMPATIBLE
src.throw_distance = throw_distance
src.throw_anchored = throw_anchored
src.throw_gentle = throw_gentle
/datum/element/knockback/Detach(datum/source)
UnregisterSignal(source, list(COMSIG_ITEM_AFTERATTACK, COMSIG_HOSTILE_POST_ATTACKINGTARGET, COMSIG_PROJECTILE_ON_HIT))
return ..()
/// triggered after an item attacks something
/datum/element/knockback/proc/item_afterattack(obj/item/source, atom/target, mob/user, proximity_flag, click_parameters)
SIGNAL_HANDLER
if(!proximity_flag)
return
do_knockback(target, user, get_dir(source, target))
return COMPONENT_AFTERATTACK_PROCESSED_ITEM
/// triggered after a hostile simplemob attacks something
/datum/element/knockback/proc/hostile_attackingtarget(mob/living/simple_animal/hostile/attacker, atom/target, success)
SIGNAL_HANDLER
if(!success)
return
do_knockback(target, attacker, get_dir(attacker, target))
/// triggered after a projectile hits something
/datum/element/knockback/proc/projectile_hit(datum/fired_from, atom/movable/firer, atom/target, Angle)
SIGNAL_HANDLER
do_knockback(target, null, angle2dir(Angle))
/**
* Throw a target in a direction
*
* Arguments:
* * target - Target atom to throw
* * thrower - Thing that caused this atom to be thrown
* * throw_dir - Direction to throw the atom
*/
/datum/element/knockback/proc/do_knockback(atom/target, mob/thrower, throw_dir)
if(!ismovable(target) || throw_dir == null)
return
var/atom/movable/throwee = target
if(throwee.anchored && !throw_anchored)
return
if(throw_distance < 0)
throw_dir = REVERSE_DIR(throw_dir)
throw_distance *= -1
var/atom/throw_target = get_edge_target_turf(throwee, throw_dir)
throwee.safe_throw_at(throw_target, throw_distance, 1, thrower, gentle = throw_gentle)