Simpler lighting process, bug fixes, & modular computer tweaks (#1809)

Fixes #1806
Fixes #1730
Fixes #1747
Partially addresses #1763
Addresses #1283
Fixes #1799
Fixes #1816
Fixes #1813

code/modules/mob/freelook/chunk.dm

@@ -101,7 +101,9 @@
 		var/turf/t = turf
 		if(obscuredTurfs[t])
 			if(!t.obfuscations[obfuscation.type])
-				t.obfuscations[obfuscation.type] = image(obfuscation.icon, t, obfuscation.icon_state, OBFUSCATION_LAYER)
+				var/image/obfuscation_static = image(obfuscation.icon, t, obfuscation.icon_state, OBFUSCATION_LAYER)
+				obfuscation_static.plane = 0
+				t.obfuscations[obfuscation.type] = obfuscation_static
 
 			obscured += t.obfuscations[obfuscation.type]
 			for(var/eye in seenby)
@@ -140,7 +142,10 @@
 	for(var/turf in obscuredTurfs)
 		var/turf/t = turf
 		if(!t.obfuscations[obfuscation.type])
-			t.obfuscations[obfuscation.type] = image(obfuscation.icon, t, obfuscation.icon_state, OBFUSCATION_LAYER)
+			var/image/obfuscation_static = image(obfuscation.icon, t, obfuscation.icon_state, OBFUSCATION_LAYER)
+			obfuscation_static.plane = 0
+			t.obfuscations[obfuscation.type] = obfuscation_static
+
 		obscured += t.obfuscations[obfuscation.type]
 
 #undef UPDATE_BUFFER

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

@@ -100,3 +100,5 @@
 	var/list/equipment_overlays = list()	// Extra overlays from equipped items
 
 	var/is_noisy = FALSE		// if TRUE, movement should make sound.
+	var/last_x = 0
+	var/last_y = 0

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

@@ -127,6 +127,10 @@
 	. = ..()
 	if (is_noisy)
 		var/turf/T = get_turf(src)
+		if (T.x == last_x && T.y == last_y)
+			return
+		last_x = T.x
+		last_y = T.y
 		if (m_intent == "run")
 			playsound(src, T.footstep_sound, 70, 1)
 		else

code/modules/mob/living/silicon/robot/gripper.dm

@@ -126,7 +126,7 @@
 		force_holder = wrapped.force
 		wrapped.force = 0.0
 		wrapped.attack(M,user)
-		if(deleted(wrapped))
+		if(QDELETED(wrapped))
 			wrapped = null
 		return 1
 	else// mob interactions
@@ -282,4 +282,4 @@
 
 	can_hold = list(
 		/obj/item/stack/material
-		)
+		)