Artifact science stuff (#1307)

* daedalusdock #675 port

* my first TGUI, and its amazing <3

* small TGUI fix

* lets use nuclear payloads to remove some unnecessary code

_maps/_basemap.dm

@@ -1,4 +1,4 @@
-//area#define LOWMEMORYMODE //uncomment this to load centcom and runtime station and thats it.
+//#define LOWMEMORYMODE //uncomment this to load centcom and runtime station and thats it.
 
 #include "map_files\generic\CentCom.dmm"
 

code/__DEFINES/~monkestation/asteroids.dm

@@ -1,6 +1,8 @@
 /// Used in asteroid composition lists to indicate a skip
 #define SKIP "skip"
 
+#define islevelbaseturf(A) istype(A, SSmapping.level_trait(A.z, ZTRAIT_BASETURF) || /turf/open/space)
+
 // Mining template rarities
 #define MINING_NO_RANDOM_SPAWN -1
 #define MINING_COMMON 1
@@ -14,3 +16,10 @@
 		stoplag(); \
 		SSatoms.map_loader_begin(REF(template)); \
 	}
+
+// error codes for the asteroid magnet
+#define MAGNET_ERROR_KEY_BUSY 1
+#define MAGNET_ERROR_KEY_USED_COORD 2
+#define MAGNET_ERROR_KEY_COOLDOWN 3
+#define MAGNET_ERROR_KEY_MOB 4
+#define MAGNET_ERROR_KEY_NO_COORD 5

monkestation/code/modules/art_sci_overrides/asteroids/asteroid_generation.dm

@@ -75,7 +75,7 @@
 
 /// Cleanup our currently loaded mining template
 /proc/CleanupAsteroidMagnet(turf/center, size)
-	var/list/turfs_to_destroy = ReserveTurfsForAsteroidGeneration(center, size, space_only = FALSE)
+	var/list/turfs_to_destroy = ReserveTurfsForAsteroidGeneration(center, size, baseturf_only = FALSE)
 	for(var/turf/T as anything in turfs_to_destroy)
 		CHECK_TICK
 
@@ -88,12 +88,12 @@
 		T.ChangeTurf(/turf/baseturf_bottom)
 
 /// Sanitizes a block of turfs to prevent writing over undesired locations
-/proc/ReserveTurfsForAsteroidGeneration(turf/center, size, space_only = TRUE)
+/proc/ReserveTurfsForAsteroidGeneration(turf/center, size, baseturf_only = TRUE)
 	. = list()
 
 	var/list/turfs = RANGE_TURFS(size, center)
 	for(var/turf/T as anything in turfs)
-		if(space_only && !isspaceturf(T))
+		if(baseturf_only && !islevelbaseturf(T))
 			continue
 		if(!(istype(T.loc, /area/station/cargo/mining/asteroid_magnet)))
 			continue