makes it plausible to hear most sounds while inside of a VR sleeper (#8034)

code/game/sound.dm

@@ -27,7 +27,10 @@
 		if(get_dist(M, turf_source) <= maxdistance)
 			M.playsound_local(turf_source, soundin, vol, vary, frequency, falloff, channel, pressure_affected, S, soundenvwet, soundenvdry)
 
-/mob/proc/playsound_local(turf/turf_source, soundin, vol as num, vary, frequency, falloff, channel = 0, pressure_affected = TRUE, sound/S, envwet = -10000, envdry = 0)
+/mob/proc/playsound_local(turf/turf_source, soundin, vol as num, vary, frequency, falloff, channel = 0, pressure_affected = TRUE, sound/S, envwet = -10000, envdry = 0, manual_x, manual_y)
+	if(audiovisual_redirect)
+		var/turf/T = get_turf(src)
+		audiovisual_redirect.playsound_local(turf_source, soundin, vol, vary, frequency, falloff, channel, pressure_affected, S, 0, -1000, turf_source.x - T.x, turf_source.y - T.y)
 	if(!client || !can_hear())
 		return
 
@@ -49,7 +52,9 @@
 		var/turf/T = get_turf(src)
 
 		//sound volume falloff with distance
-		var/distance = get_dist(T, turf_source)
+		var/distance = 0
+		if(!manual_x && !manual_y)
+			distance = get_dist(T, turf_source)
 
 		S.volume -= max(distance - world.view, 0) * 2 //multiplicative falloff to add on top of natural audio falloff.
 
@@ -77,9 +82,17 @@
 		if(S.volume <= 0)
 			return //No sound
 
-		var/dx = turf_source.x - T.x // Hearing from the right/left
+		var/dx = 0 // Hearing from the right/left
+		if(!manual_x)
+			dx = turf_source.x - T.x
+		else
+			dx = manual_x
 		S.x = dx
-		var/dz = turf_source.y - T.y // Hearing from infront/behind
+		var/dz = 0 // Hearing from infront/behind
+		if(!manual_x)
+			dz = turf_source.y - T.y
+		else
+			dz = manual_y
 		S.z = dz
 		// The y value is for above your head, but there is no ceiling in 2d spessmens.
 		S.y = 1

code/modules/VR/vr_human.dm

@@ -35,6 +35,7 @@
 
 /mob/living/carbon/human/virtual_reality/proc/revert_to_reality(deathchecks = TRUE)
 	if(real_mind && mind)
+		real_mind.current.audiovisual_redirect = null
 		real_mind.current.ckey = ckey
 		real_mind.current.stop_sound_channel(CHANNEL_HEARTBEAT)
 		if(deathchecks && vr_sleeper)

code/modules/VR/vr_sleeper.dm

@@ -93,6 +93,7 @@
 				to_chat(occupant, "<span class='warning'>Transferring to virtual reality...</span>")
 				if(vr_human && vr_human.stat == CONSCIOUS && !vr_human.real_mind)
 					SStgui.close_user_uis(occupant, src)
+					human_occupant.audiovisual_redirect = vr_human
 					vr_human.real_mind = human_occupant.mind
 					vr_human.ckey = human_occupant.ckey
 					to_chat(vr_human, "<span class='notice'>Transfer successful! You are now playing as [vr_human] in VR!</span>")
@@ -171,6 +172,7 @@
 			O.equip(vr_human)
 		if(transfer && H.mind)
 			SStgui.close_user_uis(H, src)
+			H.audiovisual_redirect = vr_human
 			vr_human.ckey = H.ckey
 
 /obj/machinery/vr_sleeper/proc/cleanup_vr_human()

code/modules/mob/living/living.dm

@@ -1067,10 +1067,12 @@
 		update_canmove() //if the mob was asleep inside a container and then got forceMoved out we need to make them fall.
 
 /mob/living/proc/update_z(new_z) // 1+ to register, null to unregister
+	if(isnull(new_z) && audiovisual_redirect)
+		return
 	if (registered_z != new_z)
 		if (registered_z)
 			SSmobs.clients_by_zlevel[registered_z] -= src
-		if (client)
+		if (client || audiovisual_redirect)
 			if (new_z)
 				SSmobs.clients_by_zlevel[new_z] += src
 				for (var/I in length(SSidlenpcpool.idle_mobs_by_zlevel[new_z]) to 1 step -1) //Backwards loop because we're removing (guarantees optimal rather than worst-case performance), it's fine to use .len here but doesn't compile on 511

code/modules/mob/mob.dm

@@ -76,6 +76,8 @@
 	return "a ... thing?"
 
 /mob/proc/show_message(msg, type, alt_msg, alt_type)//Message, type of message (1 or 2), alternative message, alt message type (1 or 2)
+	if(audiovisual_redirect)
+		audiovisual_redirect.show_message(msg ? "<avredirspan class='small'>[msg]</avredirspan>" : null, type, alt_msg ? "<avredirspan class='small'>[alt_msg]</avredirspan>" : null, alt_type)
 
 	if(!client)
 		return

code/modules/mob/mob_defines.dm

@@ -110,3 +110,5 @@
 	var/datum/click_intercept
 
 	var/registered_z
+
+	var/mob/audiovisual_redirect //Mob to redirect messages, speech, and sounds to