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Bubberstation/code/datums/elements/forced_gravity.dm
SkyratBot 4af0dd0b8f [MIRROR] addresses reviews on the tram pr made after merge, fixes diagonal movement bugs [MDB IGNORE] (#14943)
* addresses reviews on the tram pr made after merge, fixes diagonal movement bugs (#68033)

* addresses reviews on the tram pr made after merge, fixes diagonal movement bugs

* wew

Co-authored-by: Kylerace <kylerlumpkin1@gmail.com>
Co-authored-by: Gandalf <9026500+Gandalf2k15@users.noreply.github.com>
2022-07-19 00:51:33 +00:00

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/datum/element/forced_gravity
element_flags = ELEMENT_BESPOKE
id_arg_index = 2
///the level of gravity we force unto our target
var/gravity
///whether we will override the turf if it forces no gravity
var/ignore_turf_gravity
/datum/element/forced_gravity/Attach(datum/target, gravity = 1, ignore_turf_gravity = FALSE)
. = ..()
if(!isatom(target))
return ELEMENT_INCOMPATIBLE
src.gravity = gravity
src.ignore_turf_gravity = ignore_turf_gravity
RegisterSignal(target, COMSIG_ATOM_HAS_GRAVITY, .proc/gravity_check)
if(isturf(target))
RegisterSignal(target, COMSIG_TURF_HAS_GRAVITY, .proc/turf_gravity_check)
/datum/element/forced_gravity/Detach(datum/source)
. = ..()
var/static/list/signals_b_gone = list(COMSIG_ATOM_HAS_GRAVITY, COMSIG_TURF_HAS_GRAVITY)
UnregisterSignal(source, signals_b_gone)
/datum/element/forced_gravity/proc/gravity_check(datum/source, turf/location, list/gravs)
SIGNAL_HANDLER
if(!ignore_turf_gravity && location.force_no_gravity)
return FALSE
gravs += gravity
return TRUE
/datum/element/forced_gravity/proc/turf_gravity_check(datum/source, atom/checker, list/gravs)
SIGNAL_HANDLER
return gravity_check(null, source, gravs)