Arranges lots of things into planes (#5072)

* Rearranges a billion things into planes

* Make cryotubes fancy

* Update Travis

* Fix hiding logic

code/modules/power/fusion/core/core_field.dm

@@ -9,7 +9,8 @@
 	icon = 'icons/obj/machines/power/fusion.dmi'
 	icon_state = "emfield_s1"
 	alpha = 50
-	layer = 4
+	plane = MOB_PLANE
+	layer = ABOVE_MOB_LAYER
 	light_color = "#cc7700"
 
 	var/size = 1

code/modules/power/fusion/fuel_assembly/fuel_assembly.dm

@@ -2,7 +2,6 @@
 	name = "fuel rod assembly"
 	icon = 'icons/obj/machines/power/fusion.dmi'
 	icon_state = "fuel_assembly"
-	layer = 4
 
 	var/material_name
 

code/modules/power/fusion/fuel_assembly/fuel_compressor.dm

@@ -4,7 +4,6 @@
 	icon_state = "fuel_compressor1"
 	density = 1
 	anchored = 1
-	layer = 4
 
 	circuit = /obj/item/weapon/circuitboard/fusion_fuel_compressor
 

code/modules/power/lighting.dm

@@ -16,7 +16,8 @@
 	icon = 'icons/obj/lighting.dmi'
 	icon_state = "tube-construct-stage1"
 	anchored = 1
-	layer = 5
+	plane = MOB_LAYER
+	layer = ABOVE_MOB_LAYER
 	var/stage = 1
 	var/fixture_type = "tube"
 	var/sheets_refunded = 2
@@ -132,7 +133,8 @@
 	icon = 'icons/obj/lighting.dmi'
 	icon_state = "bulb-construct-stage1"
 	anchored = 1
-	layer = 5
+	plane = MOB_LAYER
+	layer = ABOVE_MOB_LAYER
 	stage = 1
 	fixture_type = "bulb"
 	sheets_refunded = 1
@@ -143,7 +145,6 @@
 	icon = 'icons/obj/lighting.dmi'
 	icon_state = "flamp-construct-stage1"
 	anchored = 0
-	layer = OBJ_LAYER
 	stage = 1
 	fixture_type = "flamp"
 	sheets_refunded = 2
@@ -156,7 +157,8 @@
 	icon_state = "tube1"
 	desc = "A lighting fixture."
 	anchored = 1
-	layer = 5  					// They were appearing under mobs which is a little weird - Ostaf
+	plane = MOB_LAYER
+	layer = ABOVE_MOB_LAYER
 	use_power = 2
 	idle_power_usage = 2
 	active_power_usage = 20

code/modules/power/sensors/powernet_sensor.dm

@@ -12,7 +12,7 @@
 	desc = "Small machine which transmits data about specific powernet"
 	anchored = 1
 	density = 0
-	layer = 2.46 // Above cables, but should be below floors.
+	layer = ABOVE_UTILITY
 	icon = 'icons/obj/objects.dmi'
 	icon_state = "floor_beacon" // If anyone wants to make better sprite, feel free to do so without asking me.
 

code/modules/power/singularity/singularity.dm

@@ -7,7 +7,7 @@
 	icon_state = "singularity_s1"
 	anchored = 1
 	density = 1
-	layer = 6
+	plane = ABOVE_PLANE
 	light_range = 6
 	unacidable = 1 //Don't comment this out.
 

code/modules/power/terminal.dm

@@ -8,10 +8,10 @@
 	icon_state = "term"
 	desc = "It's an underfloor wiring terminal for power equipment."
 	level = 1
-	layer = TURF_LAYER
 	var/obj/machinery/power/master = null
 	anchored = 1
-	layer = 2.6 // a bit above wires
+	plane = PLATING_PLANE
+	layer = WIRES_LAYER+0.01
 
 
 /obj/machinery/power/terminal/New()