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112f2e1e14
* Festival Sect is back in 2022! * wew Co-authored-by: tralezab <40974010+tralezab@users.noreply.github.com> Co-authored-by: Gandalf <9026500+Gandalf2k15@users.noreply.github.com>
67 lines
3.0 KiB
Plaintext
67 lines
3.0 KiB
Plaintext
///objects can only have one particle on them at a time, so we use these abstract effects to hold and display the effects. You know, so multiple particle effects can exist at once.
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///also because some objects do not display particles due to how their visuals are built
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/obj/effect/abstract/particle_holder
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anchored = TRUE
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mouse_opacity = MOUSE_OPACITY_TRANSPARENT
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layer = ABOVE_ALL_MOB_LAYER
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///typepath of the last location we're in, if it's different when moved then we need to update vis contents
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var/last_attached_location_type
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///the main item we're attached to at the moment, particle holders hold particles for something
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var/datum/weakref/weak_attached
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///besides the item we're also sometimes attached to other stuff! (items held emitting particles on a mob)
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var/datum/weakref/weak_additional
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/obj/effect/abstract/particle_holder/Initialize(mapload, particle_path = /particles/smoke)
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. = ..()
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if(!loc)
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stack_trace("particle holder was created with no loc!")
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return INITIALIZE_HINT_QDEL
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if(ismovable(loc))
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RegisterSignal(loc, COMSIG_MOVABLE_MOVED, .proc/on_move)
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RegisterSignal(loc, COMSIG_PARENT_QDELETING, .proc/on_qdel)
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weak_attached = WEAKREF(loc)
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particles = new particle_path
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update_visual_contents(loc)
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/obj/effect/abstract/particle_holder/Destroy(force)
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var/atom/movable/attached = weak_attached.resolve()
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var/atom/movable/additional_attached
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if(weak_additional)
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additional_attached = weak_additional.resolve()
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if(attached)
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attached.vis_contents -= src
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UnregisterSignal(loc, list(COMSIG_MOVABLE_MOVED, COMSIG_PARENT_QDELETING))
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if(additional_attached)
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additional_attached.vis_contents -= src
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QDEL_NULL(particles)
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return ..()
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///signal called when parent is moved
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/obj/effect/abstract/particle_holder/proc/on_move(atom/movable/attached, atom/oldloc, direction)
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SIGNAL_HANDLER
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if(attached.loc.type != last_attached_location_type)
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update_visual_contents(attached)
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///signal called when parent is deleted
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/obj/effect/abstract/particle_holder/proc/on_qdel(atom/movable/attached, force)
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SIGNAL_HANDLER
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qdel(src)//our parent is gone and we need to be as well
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///logic proc for particle holders, aka where they move.
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///subtypes of particle holders can override this for particles that should always be turf level or do special things when repositioning.
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///this base subtype has some logic for items, as the loc of items becomes mobs very often hiding the particles
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/obj/effect/abstract/particle_holder/proc/update_visual_contents(atom/movable/attached_to)
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//remove old
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if(weak_additional)
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var/atom/movable/resolved_location = weak_additional.resolve()
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if(resolved_location)
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resolved_location.vis_contents -= src
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//add to new
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if(isitem(attached_to) && ismob(attached_to.loc)) //special case we want to also be emitting from the mob
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var/mob/particle_mob = attached_to.loc
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last_attached_location_type = attached_to.loc
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weak_additional = WEAKREF(particle_mob)
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particle_mob.vis_contents += src
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//readd to ourselves
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attached_to.vis_contents |= src
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