[MIRROR] Adds Ruinless Cave Generation to IceBoxStation [MDB IGNORE] (#11493)

* Adds Ruinless Cave Generation to IceBoxStation (#64671)

* Adds Ruinless Cave Generation to Lavaland

This PR adds a new type of cave generation to lavaland, where you can specify different areas to spawn without ruins. This is especially important for the parts indicated in the image below, because they're bald and ugly in order to help accomodate for the structures below.

I add a new datum for cave generation that doesn't spawn ruins (simply because the generation subsystem can't spend budget in those areas), as well as a nice new area and genturf sprite to help improve contrast for the mappers who succeed me.

* Adds Ruinless Cave Generation to IceBoxStation

Co-authored-by: san7890 <34697715+san7890@users.noreply.github.com>

code/datums/mapgen/Cavegens/IcemoonCaves.dm

@@ -19,6 +19,8 @@
 	death_limit = 4
 	smoothing_iterations = 10
 
+/datum/map_generator/cave_generator/icemoon/surface/noruins //use this for when you don't want ruins to spawn in a certain area
+
 /datum/map_generator/cave_generator/icemoon/deep
 	closed_turf_types = list(/turf/closed/mineral/random/snow/underground = 1)
 	mob_spawn_list = list(/mob/living/simple_animal/hostile/asteroid/ice_demon = 50, /obj/structure/spawner/ice_moon/demonic_portal = 3, \

code/datums/mapgen/JungleGenerator.dm

@@ -85,6 +85,11 @@
 	icon = 'icons/turf/debug.dmi'
 	icon_state = "genturf"
 
+/turf/open/genturf/alternative //currently used for edge cases in which you want a certain type of map generation intermingled with other genturfs
+	name = "alternative ungenerated turf"
+	desc = "If you see this, and you're not a ghost, yell at coders pretty loudly"
+	icon_state = "genturf_alternative"
+
 /area/mine/planetgeneration
 	name = "planet generation area"
 	static_lighting = FALSE

code/game/area/areas/mining.dm

@@ -175,6 +175,11 @@
 /area/icemoon/surface/outdoors/noteleport // for places like the cursed spring water
 	area_flags = UNIQUE_AREA | FLORA_ALLOWED | NO_ALERTS | NOTELEPORT
 
+/area/icemoon/surface/outdoors/noruins // when you want random generation without the chance of getting ruins
+	icon_state = "noruins"
+	area_flags = UNIQUE_AREA | FLORA_ALLOWED | MOB_SPAWN_ALLOWED | CAVES_ALLOWED | NO_ALERTS
+	map_generator =  /datum/map_generator/cave_generator/icemoon/surface/noruins
+
 /area/icemoon/surface/outdoors/labor_camp
 	name = "Icemoon Labor Camp"
 	area_flags = UNIQUE_AREA | NO_ALERTS