Porting multi-z support updates.

code/__DEFINES/atmospherics.dm

@@ -143,7 +143,9 @@
 #define ATMOS_PASS_NO 0
 #define ATMOS_PASS_PROC -1 //ask CanAtmosPass()
 #define ATMOS_PASS_DENSITY -2 //just check density
+
 #define CANATMOSPASS(A, O) ( A.CanAtmosPass == ATMOS_PASS_PROC ? A.CanAtmosPass(O) : ( A.CanAtmosPass == ATMOS_PASS_DENSITY ? !A.density : A.CanAtmosPass ) )
+#define CANVERTICALATMOSPASS(A, O) ( A.CanAtmosPassVertical == ATMOS_PASS_PROC ? A.CanAtmosPass(O, TRUE) : ( A.CanAtmosPassVertical == ATMOS_PASS_DENSITY ? !A.density : A.CanAtmosPassVertical ) )
 
 //LAVALAND
 #define LAVALAND_EQUIPMENT_EFFECT_PRESSURE 50 //what pressure you have to be under to increase the effect of equipment meant for lavaland

code/__DEFINES/components.dm

@@ -98,6 +98,7 @@
 // /turf signals
 #define COMSIG_TURF_CHANGE "turf_change"						//from base of turf/ChangeTurf(): (path, list/new_baseturfs, flags, list/transferring_comps)
 #define COMSIG_TURF_HAS_GRAVITY "turf_has_gravity"				//from base of atom/has_gravity(): (atom/asker, list/forced_gravities)
+#define COMSIG_TURF_MULTIZ_NEW "turf_multiz_new"				//from base of turf/New(): (turf/source, direction)
 
 // /atom/movable signals
 #define COMSIG_MOVABLE_MOVED "movable_moved"					//from base of atom/movable/Moved(): (/atom, dir)

code/__DEFINES/is_helpers.dm

@@ -13,6 +13,16 @@
 //Turfs
 //#define isturf(A) (istype(A, /turf)) This is actually a byond built-in. Added here for completeness sake.
 
+GLOBAL_LIST_INIT(turfs_without_ground, typecacheof(list(
+	/turf/open/space,
+	/turf/open/chasm,
+	/turf/open/lava,
+	/turf/open/water,
+	/turf/open/openspace
+	)))
+
+#define isgroundlessturf(A) (is_type_in_typecache(A, GLOB.turfs_without_ground))
+
 #define isopenturf(A) (istype(A, /turf/open))
 
 #define isindestructiblefloor(A) (istype(A, /turf/open/indestructible))

code/__DEFINES/layers.dm

@@ -9,6 +9,7 @@
 #define FLOOR_PLANE -2
 #define GAME_PLANE -1
 #define BLACKNESS_PLANE 0 //To keep from conflicts with SEE_BLACKNESS internals
+
 #define SPACE_LAYER 1.8
 //#define TURF_LAYER 2 //For easy recordkeeping; this is a byond define
 #define MID_TURF_LAYER 2.02
@@ -83,25 +84,28 @@
 #define ABOVE_LIGHTING_PLANE 16
 #define ABOVE_LIGHTING_LAYER 16
 
-#define BYOND_LIGHTING_PLANE 17
-#define BYOND_LIGHTING_LAYER 17
+#define FLOOR_OPENSPACE_PLANE 17
+#define OPENSPACE_LAYER 17
 
-#define CAMERA_STATIC_PLANE 18
-#define CAMERA_STATIC_LAYER 18
+#define BYOND_LIGHTING_PLANE 18
+#define BYOND_LIGHTING_LAYER 18
+
+#define CAMERA_STATIC_PLANE 19
+#define CAMERA_STATIC_LAYER 19
 //HUD layer defines
 
-#define FULLSCREEN_PLANE 19
-#define FLASH_LAYER 19
-#define FULLSCREEN_LAYER 19.1
-#define UI_DAMAGE_LAYER 19.2
-#define BLIND_LAYER 19.3
-#define CRIT_LAYER 19.4
-#define CURSE_LAYER 19.5
+#define FULLSCREEN_PLANE 20
+#define FLASH_LAYER 20
+#define FULLSCREEN_LAYER 20.1
+#define UI_DAMAGE_LAYER 20.2
+#define BLIND_LAYER 20.3
+#define CRIT_LAYER 20.4
+#define CURSE_LAYER 20.5
 
-#define HUD_PLANE 20
-#define HUD_LAYER 20
-#define ABOVE_HUD_PLANE 21
-#define ABOVE_HUD_LAYER 21
+#define HUD_PLANE 21
+#define HUD_LAYER 21
+#define ABOVE_HUD_PLANE 22
+#define ABOVE_HUD_LAYER 22
 
-#define SPLASHSCREEN_LAYER 22
-#define SPLASHSCREEN_PLANE 22
+#define SPLASHSCREEN_LAYER 23
+#define SPLASHSCREEN_PLANE 23

code/__DEFINES/maps.dm

@@ -37,6 +37,7 @@ require only minor tweaks.
 #define ZTRAIT_AWAY "Away Mission"
 #define ZTRAIT_SPACE_RUINS "Space Ruins"
 #define ZTRAIT_LAVA_RUINS "Lava Ruins"
+#define ZTRAIT_ISOLATED_RUINS "Isolated Ruins" //Placing ruins on z levels with this trait will use turf reservation instead of usual placement.
 // prevents certain turfs from being stripped by a singularity
 #define ZTRAIT_PLANET "Planet"
 
@@ -89,6 +90,8 @@ require only minor tweaks.
 #define PLACEMENT_TRIES 100 //How many times we try to fit the ruin somewhere until giving up (really should just swap to some packing algo)
 
 #define PLACE_DEFAULT "random"
-#define PLACE_SAME_Z "same"
-#define PLACE_SPACE_RUIN "space"
-#define PLACE_LAVA_RUIN "lavaland"
+#define PLACE_SAME_Z "same" //On same z level as original ruin
+#define PLACE_SPACE_RUIN "space" //On space ruin z level(s)
+#define PLACE_LAVA_RUIN "lavaland" //On lavaland ruin z levels(s)
+#define PLACE_BELOW "below" //On z levl below - centered on same tile
+#define PLACE_ISOLATED "isolated" //On isolated ruin z level

code/__DEFINES/obj_flags.dm

@@ -11,6 +11,7 @@
 #define USES_TGUI				(1<<7)	//put on things that use tgui on ui_interact instead of custom/old UI.
 #define FROZEN					(1<<8)
 #define SHOVABLE_ONTO			(1<<9) //called on turf.shove_act() to consider whether an object should have a niche effect (defined in their own shove_act()) when someone is pushed onto it, or do a sanity CanPass() check.
+#define BLOCK_Z_FALL			(1<<10)
 
 // If you add new ones, be sure to add them to /obj/Initialize as well for complete mapping support