/
burning.dm
111 lines (92 loc) · 4.05 KB
/
burning.dm
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GLOBAL_DATUM_INIT(fire_overlay, /mutable_appearance, mutable_appearance('icons/effects/fire.dmi', "fire", appearance_flags = RESET_COLOR))
/**
* Component representing an atom being on fire.
* Should not be used on mobs, they use the fire stacks status effects.
* Can only be used on atoms that use the integrity system.
*/
/datum/component/burning
/// Fire overlay appearance we apply
var/fire_overlay
/// Particle holder for fire particles, if any
var/obj/effect/abstract/particle_holder/particle_effect
/datum/component/burning/Initialize(fire_overlay = GLOB.fire_overlay, fire_particles = /particles/smoke/burning)
if(!isatom(parent))
return COMPONENT_INCOMPATIBLE
var/atom/atom_parent = parent
if(!atom_parent.uses_integrity)
stack_trace("Tried to add /datum/component/burning to an atom ([atom_parent.type]) that does not use atom_integrity!")
return COMPONENT_INCOMPATIBLE
// only flammable atoms should have this component, but it's not really an error if we try to apply this to a non flammable one
if(!(atom_parent.resistance_flags & FLAMMABLE) || (atom_parent.resistance_flags & FIRE_PROOF))
qdel(src)
return
src.fire_overlay = fire_overlay
if(fire_particles)
// burning particles look pretty bad when they stack on mobs, so that behavior is not wanted for items
particle_effect = new(atom_parent, fire_particles, isitem(atom_parent) ? NONE : PARTICLE_ATTACH_MOB)
START_PROCESSING(SSburning, src)
/datum/component/burning/Destroy(force)
STOP_PROCESSING(SSburning, src)
fire_overlay = null
if(particle_effect)
QDEL_NULL(particle_effect)
return ..()
/datum/component/burning/RegisterWithParent()
RegisterSignal(parent, COMSIG_ATOM_ATTACK_HAND, PROC_REF(on_attack_hand))
RegisterSignal(parent, COMSIG_ATOM_UPDATE_OVERLAYS, PROC_REF(on_update_overlays))
RegisterSignal(parent, COMSIG_ATOM_EXAMINE, PROC_REF(on_examine))
RegisterSignal(parent, COMSIG_ATOM_EXTINGUISH, PROC_REF(on_extinguish))
var/atom/atom_parent = parent
atom_parent.resistance_flags |= ON_FIRE
atom_parent.update_appearance()
/datum/component/burning/UnregisterFromParent()
UnregisterSignal(parent, list(
COMSIG_ATOM_ATTACK_HAND,
COMSIG_ATOM_UPDATE_OVERLAYS,
COMSIG_ATOM_EXAMINE,
COMSIG_ATOM_EXTINGUISH,
))
var/atom/atom_parent = parent
if(!QDELETED(atom_parent))
atom_parent.resistance_flags &= ~ON_FIRE
atom_parent.update_appearance()
/datum/component/burning/process(seconds_per_tick)
var/atom/atom_parent = parent
// Check if the parent somehow became fireproof, remove component if so
if(atom_parent.resistance_flags & FIRE_PROOF)
atom_parent.extinguish()
return
atom_parent.take_damage(10 * seconds_per_tick, BURN, FIRE, FALSE)
/// Alerts any examiners that the parent is on fire (even though it should be rather obvious)
/datum/component/burning/proc/on_examine(atom/source, mob/user, list/examine_list)
SIGNAL_HANDLER
examine_list += span_danger("[source.p_Theyre()] burning!")
/// Handles searing the hand of anyone who tries to touch parent without protection.
/datum/component/burning/proc/on_attack_hand(atom/source, mob/living/carbon/user)
SIGNAL_HANDLER
if(!iscarbon(user) || user.can_touch_burning(source))
to_chat(user, span_notice("You put out the fire on [source]."))
source.extinguish()
return COMPONENT_CANCEL_ATTACK_CHAIN
var/obj/item/bodypart/affecting = user.get_active_hand()
//Should not happen!
if(!affecting)
return NONE
affecting.receive_damage(burn = 5)
to_chat(user, span_userdanger("You burn your hand on [source]!"))
INVOKE_ASYNC(user, TYPE_PROC_REF(/mob, emote), "scream")
playsound(source, SFX_SEAR, 50, TRUE)
user.update_damage_overlays()
return COMPONENT_CANCEL_ATTACK_CHAIN
/// Maintains the burning overlay on the parent atom
/datum/component/burning/proc/on_update_overlays(atom/source, list/overlays)
SIGNAL_HANDLER
//most likely means the component is being removed
if(!(source.resistance_flags & ON_FIRE))
return
if(fire_overlay)
overlays += fire_overlay
/// Deletes the component when the atom gets extinguished
/datum/component/burning/proc/on_extinguish(atom/source, list/overlays)
SIGNAL_HANDLER
qdel(src)