Motion tracker subsystem (#17215)

* Motion tracker basics

* force unsubscribe on destroy

* remove tracking on destroy too

* missing include

* use new art

* logging

* per client echos

* toggle verb

* vis things not needed, and reset vis option if resubbed

* blind and deaf should affect this

* feedback on toggle

* teshari gain vibration sense, lose listen in

* xenochi too

xenochi also get vibration sense

---------

Co-authored-by: Willburd <7099514+Willburd@users.noreply.github.com>

code/modules/mob/death.dm

@@ -79,6 +79,7 @@
 		src.visible_message(span_infoplain(span_bold("\The [src.name]") + " [deathmessage]"))
 
 	set_stat(DEAD)
+	SSmotiontracker.ping(src,80)
 
 	update_canmove()
 

code/modules/mob/living/carbon/human/human_helpers.dm

@@ -191,18 +191,14 @@
 				var/obj/item/clothing/glasses/V = rig.visor.vision.glasses
 				compiled_vis |= V.enables_planes
 
-	//VOREStation Add - NIF Support
 	if(nif)
 		compiled_vis |= nif.planes_visible()
 	//event hud
 	if(vantag_hud)
 		compiled_vis |= VIS_CH_VANTAG
-	//VOREStation Add End
 
-	//Vore Stomach addition start. This goes here.
 	if(stomach_vision)
 		compiled_vis += VIS_CH_STOMACH
-	//Vore Stomach addition end
 
 	if(!compiled_vis.len && !vis_enabled.len)
 		return //Nothin' doin'.

code/modules/mob/living/carbon/human/species/species.dm

@@ -123,6 +123,7 @@
 	var/emp_dmg_mod =		1			// Multiplier to all EMP damage sustained by the mob, if it's EMP-sensitive
 	var/emp_stun_mod = 		1			// Multiplier to all EMP disorient/etc. sustained by the mob, if it's EMP-sensitive
 	var/vision_flags = SEE_SELF							// Same flags as glasses.
+	var/has_vibration_sense = FALSE 	// Motion tracker subsystem
 
 	// Death vars.
 	var/meat_type = /obj/item/reagent_containers/food/snacks/meat/human

code/modules/mob/living/carbon/human/species/station/station_special_vr.dm

@@ -17,6 +17,7 @@
 	base_species = "Xenochimera"
 	selects_bodytype = SELECTS_BODYTYPE_CUSTOM
 	digi_allowed = TRUE
+	has_vibration_sense = TRUE
 
 	num_alternate_languages = 3
 	species_language = null
@@ -26,7 +27,7 @@
 	icobase_tail = 1
 	inherent_verbs = list(
 		/mob/living/carbon/human/proc/reconstitute_form,
-		/mob/living/carbon/human/proc/sonar_ping,
+		///mob/living/carbon/human/proc/sonar_ping,
 		/mob/living/carbon/human/proc/tie_hair)
 
 	virus_immune = 1 // They practically ARE one.

code/modules/mob/living/carbon/human/species/station/teshari.dm

@@ -53,6 +53,7 @@
 	pass_flags = PASSTABLE
 	holder_type = /obj/item/holder/human
 //	short_sighted = 1
+	has_vibration_sense = TRUE
 	gluttonous = 1
 	blood_volume = 400
 	hunger_factor = 0.2
@@ -134,7 +135,7 @@
 		)
 
 	inherent_verbs = list(
-		/mob/living/carbon/human/proc/sonar_ping,
+		///mob/living/carbon/human/proc/sonar_ping,
 		/mob/living/proc/hide
 		)
 

code/modules/mob/living/carbon/human/species/station/teshari_vr.dm

@@ -20,7 +20,7 @@
 	vore_belly_default_variant = "T" //Teshari belly sprite
 
 	inherent_verbs = list(
-		/mob/living/carbon/human/proc/sonar_ping,
+		///mob/living/carbon/human/proc/sonar_ping,
 		/mob/living/proc/hide,
 		/mob/living/proc/toggle_pass_table
 		)

code/modules/mob/living/carbon/human/species/station/traits_vr/positive.dm

@@ -365,3 +365,24 @@
 	is_genetrait = TRUE
 	hidden = FALSE
 	activation_message="Your body feels mundane."
+
+/datum/trait/positive/vibration_sense
+	name = "Vibration Sense"
+	desc = "Allows you to sense subtle vibrations nearby, even if the source cannot be seen."
+	cost = 2
+	var_changes = list("has_vibration_sense" = TRUE)
+
+	// Traitgenes edit begin - Made into a gene trait
+	is_genetrait = TRUE
+	hidden = FALSE
+
+	activation_message="Your ears ring, and hear everything..."
+	// Traitgenes edit end
+
+/datum/trait/positive/vibration_sense/apply(datum/species/S, mob/living/carbon/human/H, trait_prefs)
+	. = ..()
+	H.motiontracker_subscribe()
+
+/datum/trait/positive/vibration_sense/unapply(datum/species/S, mob/living/carbon/human/H, trait_prefs)
+	. = ..()
+	H.motiontracker_unsubscribe()

code/modules/mob/living/living_movement.dm

@@ -269,6 +269,8 @@ default behaviour is:
 /mob/living/Moved(var/atom/oldloc, direct, forced, movetime)
 	. = ..()
 	handle_footstep(loc)
+	if(!forced && movetime)
+		SSmotiontracker?.ping(src) // Incase of before init "turf enter gravity" this is ?, unfortunately.
 	// Begin VOREstation edit
 	if(is_shifted)
 		is_shifted = FALSE

code/modules/mob/mob.dm

@@ -39,6 +39,8 @@
 	vore_selected = null // from code/modules/vore/eating/mob_vr
 	focus = null
 
+	motiontracker_unsubscribe(TRUE) // Force unsubscribe
+
 	if(mind)
 		if(mind.current == src)
 			mind.current = null

code/modules/mob/mob_defines.dm

@@ -243,3 +243,5 @@
 	var/list/resistances
 
 	var/custom_footstep = FOOTSTEP_MOB_SHOE
+	VAR_PRIVATE/is_motion_tracking = FALSE // Prevent multiple unsubs and resubs, also used to check if the vis layer is enabled, use has_motiontracking() to get externally.
+	VAR_PRIVATE/wants_to_see_motion_echos = TRUE

code/modules/mob/motiontracker.dm

@@ -0,0 +1,48 @@
+/mob/proc/has_motiontracking() // USE THIS
+	return is_motion_tracking
+
+// Subscribing and unsubscribingto the motion tracker subsystem
+/mob/proc/motiontracker_subscribe()
+	if(!is_motion_tracking)
+		is_motion_tracking = TRUE
+		wants_to_see_motion_echos = TRUE
+		RegisterSignal(SSmotiontracker, COMSIG_MOVABLE_MOTIONTRACKER, PROC_REF(handle_motion_tracking))
+		add_verb(src,/mob/proc/toggle_motion_echo_vis)
+
+/mob/proc/motiontracker_unsubscribe(var/destroying = FALSE)
+	if(is_motion_tracking)
+		is_motion_tracking = FALSE
+		UnregisterSignal(SSmotiontracker, COMSIG_MOVABLE_MOTIONTRACKER)
+		remove_verb(src,/mob/proc/toggle_motion_echo_vis)
+
+/mob/living/carbon/human/motiontracker_unsubscribe(destroying = FALSE)
+	// Block unsub if our species has vibration senses
+	if(!destroying && species?.has_vibration_sense)
+		return
+	. = ..()
+
+// For COMSIG_MOVABLE_MOTIONTRACKER
+/mob/proc/handle_motion_tracking(mob/source, var/datum/weakref/RW, var/turf/T)
+	SIGNAL_HANDLER
+	SHOULD_NOT_OVERRIDE(TRUE)
+	PRIVATE_PROC(TRUE)
+	if(!client || !wants_to_see_motion_echos || stat || is_deaf())
+		return
+	var/atom/echo_source = RW?.resolve()
+	if(!echo_source || get_dist(src,echo_source) > SSmotiontracker.max_range || src.z != echo_source.z)
+		return
+	// Blind characters see all pings around them. Otherwise remove the closest, or any we can see. Pings behind walls or in the dark are always visible
+	if(!is_blind() && (get_dist(src,echo_source) < SSmotiontracker.min_range || (T.get_lumcount() >= 0.20 && can_see(src, T, 7)) ))
+		return
+	var/echos = 1
+	if(prob(30))
+		echos = rand(1,3)
+	SSmotiontracker.queue_echo(get_turf(src),T,echos,client ? WEAKREF(client) : null)
+
+/mob/proc/toggle_motion_echo_vis()
+	set name = "Toggle Vibration Senses"
+	set desc = "Toggle the visibility of pings revealed by vibration senses or motion trackers."
+	set category = "Abilities.General"
+
+	wants_to_see_motion_echos = !wants_to_see_motion_echos
+	to_chat(src,"You will [wants_to_see_motion_echos ? "now" : "no longer"] see echos")