Adds the Xanu System & Xanu Prime (#20917)

Adds a Xanu region for Xanu Prime to spawn in. Ice/barren asteroids as
possible spawns for mining operations.

Adds Xanu Prime as a visitable planet, with 2 regions: the arid
grasslands of Naya-Khyber; the tundra of Himavatia.

Only basic, super generic planet ruins included.

Random ground survey data available for scientific investigations.

The following assets that **have not** been created by myself are
included in this PR:

| Path | Original Author | License |
| --- | --- | --- |
| /html/images/scans/exoplanets/xanu_prime.png | Kyres1 (Sourced from
our own wiki) | CC BY-SA 4.0 |
| /sound/music/regional/xanu/xanu_rock_1.ogg | Swara Sutra
(https://swarasutra.bandcamp.com/album/indulgence) | CC BY-NC-SA 3.0 |
| /sound/music/regional/xanu/xanu_rock_2.ogg | Swara Sutra
(https://swarasutra.bandcamp.com/album/indulgence) | CC BY-NC-SA 3.0 |

code/modules/background/space_sectors/coalition/coalition.dm

@@ -51,11 +51,9 @@
 /datum/space_sector/libertys_cradle
 	name = SECTOR_LIBERTYS_CRADLE
 	description = "The beating heart of the modern Coalition of Colonies, Liberty’s Cradle is home to many of the Coalition’s most developed and influential worlds. In contrast to the Solarian stereotype of the frontier as a decivilized wasteland populated by roving bands of pirates and petty warlords, Liberty’s Cradle is a prosperous and safe region which has a higher standard of living than much of the former Middle and Outer Ring possessed prior to the Solarian Collapse of 2462. Post-Collapse the area has continued to prosper and, now that it dwells far behind the Coalition-controlled Weeping Stars, is more secure than it has ever been before."
-	skybox_icon = "the_clash"//placeholder
+	skybox_icon = "arusha"//placeholder
 //	cargo_price_coef = TBD
-	starlight_color = "#962d96"
-	starlight_power = 2
-	starlight_range = 4
+	starlight_range = 2
 
 /datum/space_sector/burzsia
 	name = SECTOR_BURZSIA
@@ -133,3 +131,19 @@
 		"77.7 SoulFM" = 'texts/lore_radio/konyang/77.7_SoulFM.txt',
 		"78.1 RealFM" = 'texts/lore_radio/konyang/78.1_RealFM.txt'
 	)
+
+/datum/space_sector/xanu
+	name = SECTOR_XANU
+	description = "Located in the eastern Orion Spur. The Xanu system is home to the Xanu Prime, colonised in 2185, which has grown into the current capital of the Coalition of Colonies, a decentralised government that won its independence from the Solarian Alliance after the Interstellar War."
+	skybox_icon = "arusha" //placeholder
+	possible_exoplanets = list(/obj/effect/overmap/visitable/sector/exoplanet/barren/asteroid, /obj/effect/overmap/visitable/sector/exoplanet/barren/asteroid/ice)
+	guaranteed_exoplanets = list(/obj/effect/overmap/visitable/sector/exoplanet/xanu)
+
+	ports_of_call = list("Pataliputra")
+	scheduled_port_visits = list("Saturday", "Sunday")
+	starlight_range = 2
+
+	lobby_tracks = list(
+		'sound/music/regional/xanu/xanu_rock_1.ogg',
+		'sound/music/regional/xanu/xanu_rock_2.ogg'
+	)

code/modules/mapping/planet_types/lore/xanu.dm

@@ -0,0 +1,109 @@
+
+// Xanu Prime
+
+/obj/effect/overmap/visitable/sector/exoplanet/xanu
+	name = "Xanu Prime"
+	desc = "The capital of the Coalition of Colonies. Xanu Prime is a geographically diverse, Earth-like world with varied biomes, ranging from equatorial rainforests and tropical deserts to boreal forests and polar continents. Sieged during the Interstellar War, the planet is scarred by battles and orbital bombardments of the past."
+	icon_state = "globe2"
+	scanimage = "xanu_prime.png"
+	color = "#7c945c"
+	planetary_area = /area/exoplanet/grass/xanu
+	initial_weather_state = /singleton/state/weather/calm
+	has_water_weather = TRUE
+	massvolume = "~1.05"
+	surfacegravity = "1.07"
+	charted = "Charted 2156, Sol Alliance Department of Colonization."
+	alignment = "Coalition of Colonies"
+	geology = "4 major continents exhibiting typical seismic activty. Abundance of cratering detected on surface; flooded to form lakes."
+	weather = "Global full-atmosphere hydrological weather system."
+	surfacewater = "67% surface salt water"
+	surface_color = null//pre colored
+	water_color = null//pre colored
+	rock_colors = null//pre colored
+	plant_colors = null//pre colored
+	generated_name = FALSE
+	flora_diversity = 0
+	has_trees = FALSE
+	ruin_planet_type = PLANET_LORE
+	place_near_main = list(1,0)
+
+	// Defaults, later set under pre_ruin_preparation
+	ruin_type_whitelist = list(/datum/map_template/ruin/exoplanet/delivery_site, /datum/map_template/ruin/exoplanet/crashed_coc_skipjack)
+	possible_themes = list(/datum/exoplanet_theme/grass/xanu_nayakhyber)
+	surface_color = "#7c945c"
+	var/landing_region = "grasslands and mountains of Naya Khyber"
+
+/obj/effect/overmap/visitable/sector/exoplanet/xanu/generate_habitability()
+	return HABITABILITY_IDEAL
+
+/obj/effect/overmap/visitable/sector/exoplanet/xanu/generate_map()
+	lightlevel = rand(1,10)
+	..()
+
+/obj/effect/overmap/visitable/sector/exoplanet/xanu/update_icon()
+	return
+
+/obj/effect/overmap/visitable/sector/exoplanet/xanu/generate_atmosphere()
+	..()
+	if(atmosphere)
+		atmosphere.remove_ratio(1)
+		atmosphere.adjust_gas(GAS_OXYGEN, MOLES_O2STANDARD, 1)
+		atmosphere.adjust_gas(GAS_NITROGEN, MOLES_N2STANDARD, 1)
+
+		if(landing_region)
+			switch(landing_region)
+				if("grasslands and mountains of Naya Khyber")
+					atmosphere.temperature = T0C + rand(25,30)
+				if("valleys and cliffs of Himavatia")
+					atmosphere.temperature = T0C - rand(1,5)
+
+		atmosphere.update_values()
+
+/obj/effect/overmap/visitable/sector/exoplanet/xanu/generate_ground_survey_result()
+	ground_survey_result = "<br><b>Notable Features:</b>"
+
+	switch(landing_region)
+		if("grasslands and mountains of Naya Khyber")
+			ground_survey_result += "<br>Clay-loam soil with a dense, sticky texture; excellent retention of nutrients and water for agricultural purposes."
+			ground_survey_result += "<br>Trace materials and signatures consistent with historical orbital bombardment: lead, uranium. Carbon-dated: ~220 years old."
+			switch(rand(1,3))
+				if(1)
+					ground_survey_result += "<br>(!) Large mineral deposit of lithium in the form of spodumene. Inform local authority for reward."
+				if(2)
+					ground_survey_result += "<br>(!) Region displays above average retention of nutrients and water for agricultural purposes. Inform local authority for reward."
+				if(3)
+					ground_survey_result += "<br>(!) Region otherwise typical of Naya Khyber."
+		if("valleys and cliffs of Himavatia")
+			ground_survey_result += "<br>Permafrost with massive ice layer. Unable to sustain deep-rooted flora."
+			ground_survey_result += "<br>Ground form consistent with high, historical glacial activity."
+			switch(rand(1,2))
+				if(1)
+					ground_survey_result += "<br>(!) Large oil trap detected, containing significant crude oil deposit. Inform local authority for reward."
+				if(2)
+					ground_survey_result += "<br>(!) Region otherwise typical of Himavatia."
+
+/obj/effect/overmap/visitable/sector/exoplanet/xanu/pre_ruin_preparation()
+	if(prob(66))
+		landing_region = "grasslands and mountains of Naya Khyber"
+	else
+		landing_region = "valleys and cliffs of Himavatia"
+
+	desc += " The landing sites are located in the [landing_region]."
+
+	switch(landing_region)
+		if("grasslands and mountains of Naya Khyber")
+			possible_themes = list(/datum/exoplanet_theme/grass/xanu_nayakhyber)
+			surface_color = "#7c945c"
+
+			ruin_type_whitelist = list(/datum/map_template/ruin/exoplanet/delivery_site, /datum/map_template/ruin/exoplanet/crashed_coc_skipjack)
+
+			desc += " The local government only permits Scientific Sampling operations in this area; other operations are not permitted."
+
+		if("valleys and cliffs of Himavatia")
+			possible_themes = list(/datum/exoplanet_theme/snow/tundra/xanu_himavatia)
+			surface_color = "#d0fac5"
+			initial_weather_state = /singleton/state/weather/calm/arctic_planet
+
+			ruin_type_whitelist = list(/datum/map_template/ruin/exoplanet/delivery_site, /datum/map_template/ruin/exoplanet/crashed_coc_skipjack)
+
+			desc += " The local government only permits Scientific Sampling operations in this area; other operations are not permitted."

code/modules/overmap/exoplanets/biomes/grass.dm

@@ -455,3 +455,91 @@
 			/mob/living/simple_animal/miervesh = 1
 		)
 	)
+
+//Xanu Biomes
+//TODO: Xanu flora and fauna
+/singleton/biome/grass/xanu
+	turf_type = /turf/simulated/floor/exoplanet/grass/stalk
+	spawn_types = list(
+		GRASS_1 = list(
+			/obj/structure/flora/ausbushes/ywflowers = 1
+		),
+		GRASS_2 = list(
+			/obj/structure/flora/ausbushes/brflowers = 1
+		),
+		GRASS_3 = list(
+			/obj/structure/flora/ausbushes/ppflowers = 1
+		),
+		SMALL_FLORA = list(
+			/obj/structure/flora/ausbushes/ywflowers = 1,
+			/obj/structure/flora/ausbushes/brflowers = 1,
+			/obj/structure/flora/ausbushes/ppflowers = 1,
+			/obj/structure/flora/ausbushes/grassybush = 1,
+			/obj/structure/flora/ausbushes/palebush = 1,
+			/obj/structure/flora/ausbushes = 1,
+			/obj/structure/flora/ausbushes/fernybush = 1,
+			/obj/effect/landmark/exoplanet_spawn/plant = 1
+		),
+		WILDLIFE = list() // No wildlife assets for xanu
+	)
+
+/singleton/biome/grass/forest/xanu
+	turf_type = /turf/simulated/floor/exoplanet/grass/stalk
+
+	spawn_types = list(
+		LARGE_FLORA = list(
+			/obj/structure/flora/tree/grove = 1
+		),
+		SMALL_FLORA = list(
+			/obj/structure/flora/ausbushes/ywflowers = 1,
+			/obj/structure/flora/ausbushes/brflowers = 1,
+			/obj/structure/flora/ausbushes/ppflowers = 1,
+			/obj/structure/flora/ausbushes/grassybush = 1,
+			/obj/structure/flora/ausbushes/palebush = 1,
+			/obj/structure/flora/ausbushes = 1,
+			/obj/structure/flora/ausbushes/fernybush = 1,
+			/obj/effect/landmark/exoplanet_spawn/plant = 1
+		),
+		WILDLIFE = list()
+	)
+
+/singleton/biome/grass/riverside/xanu
+	turf_type = /turf/simulated/floor/exoplanet/grass/stalk
+
+	spawn_types = list(
+		PLANET_TURF = list(
+			/turf/simulated/floor/exoplanet/water/shallow = 1
+		),
+		SMALL_FLORA = list(
+			/obj/structure/flora/ausbushes/reedbush = 1,
+			/obj/structure/flora/ausbushes/stalkybush = 1,
+			/obj/effect/landmark/exoplanet_spawn/plant = 1
+		),
+		WILDLIFE = list(
+			/mob/living/simple_animal/aquatic/fish/cod = 1,
+			/mob/living/simple_animal/aquatic/fish/gupper = 1
+		)
+	)
+
+/singleton/biome/grass/chaparral/xanu
+	turf_type = /turf/simulated/floor/exoplanet/dirt_konyang
+
+	spawn_types = list(
+		GRASS_1 = list(
+			/obj/structure/flora/ausbushes/ywflowers = 1
+		),
+		GRASS_2 = list(
+			/obj/structure/flora/ausbushes/brflowers = 1
+		),
+		GRASS_3 = list(
+			/obj/structure/flora/ausbushes/ppflowers = 1
+		),
+		SMALL_FLORA = list(
+			/obj/structure/flora/ausbushes/grassybush = 1,
+			/obj/structure/flora/ausbushes/palebush = 1,
+			/obj/structure/flora/ausbushes = 1,
+			/obj/structure/flora/ausbushes/fernybush = 1,
+			/obj/effect/landmark/exoplanet_spawn/plant = 1
+		),
+		WILDLIFE = list()
+	)

code/modules/overmap/exoplanets/biomes/snow.dm

@@ -254,3 +254,51 @@
 
 /singleton/biome/water/ice/polar
 	turf_type = /turf/simulated/floor/exoplanet/ice/dark
+
+// Xanu Biomes
+// TODO: Xanan wildlife
+/singleton/biome/snow/xanu
+	spawn_types = list(
+		PLANET_TURF = list(/turf/simulated/floor/exoplanet/permafrost = 1),
+		GRASSES = list(
+			/obj/structure/flora/grass/both = 2,
+			/obj/structure/flora/grass/green = 1,
+			/obj/structure/flora/grass/brown = 1
+		),
+		LARGE_FLORA = list(
+			/obj/effect/floor_decal/snowdrift/large/random = 4,
+			/obj/structure/flora/rock/snow = 4,
+			/obj/structure/flora/tree/dead = 2,
+			/obj/structure/flora/tree/pine = 1,
+			/obj/effect/landmark/exoplanet_spawn/large_plant = 1
+		),
+		SMALL_FLORA = list(
+			/obj/structure/flora/bush = 2,
+			/obj/effect/floor_decal/snowrocks = 1,
+			/obj/effect/floor_decal/snowdrift/random = 1,
+			/obj/effect/landmark/exoplanet_spawn/plant = 2
+		),
+		WILDLIFE = list() //No Xanu wildlife assets yet
+	)
+
+/singleton/biome/snow/forest/xanu
+	spawn_types = list(
+		GRASSES = list(
+			/obj/structure/flora/grass/both = 1,
+			/obj/structure/flora/grass/green = 2,
+			/obj/structure/flora/grass/brown = 1
+		),
+		LARGE_FLORA = list(
+			/obj/structure/flora/rock/snow = 1,
+			/obj/structure/flora/tree/dead = 2,
+			/obj/structure/flora/tree/pine = 4,
+			/obj/effect/landmark/exoplanet_spawn/large_plant = 3
+		),
+		SMALL_FLORA = list(
+			/obj/structure/flora/bush = 3,
+			/obj/effect/floor_decal/snowrocks = 1,
+			/obj/effect/floor_decal/snowdrift/random = 1,
+			/obj/effect/landmark/exoplanet_spawn/plant = 3
+		),
+		WILDLIFE = list() //no xanu wildlife assets yet
+	)

code/modules/overmap/exoplanets/decor/_areas.dm

@@ -68,6 +68,10 @@
 	name = "Konyang Wilderness"
 	base_turf = /turf/simulated/floor/exoplanet/konyang
 
+/area/exoplanet/grass/xanu
+	name = "Xanu Prime Wilderness"
+	base_turf = /turf/simulated/floor/exoplanet/grass/stalk
+
 /area/exoplanet/lava
 	name = "\improper Planetary surface"
 	ambience = AMBIENCE_LAVA

code/modules/overmap/exoplanets/themes/grass.dm

@@ -158,3 +158,28 @@
 		BIOME_SEMIARID = 0.5,
 		BIOME_SUBHUMID = 1.0
 	)
+
+/datum/exoplanet_theme/grass/xanu_nayakhyber
+	name = "Naya Khyber"
+	surface_turfs = list(
+		/turf/simulated/floor/exoplanet/grass/stalk,
+		/turf/simulated/mineral/planet
+	)
+
+	possible_biomes = list(
+		BIOME_COOL = list(
+			BIOME_ARID = /singleton/biome/grass/xanu,
+			BIOME_SEMIARID = /singleton/biome/grass/chaparral/xanu,
+			BIOME_SUBHUMID = /singleton/biome/grass/forest/xanu
+		),
+		BIOME_WARM = list(
+			BIOME_ARID = /singleton/biome/grass/chaparral/xanu,
+			BIOME_SEMIARID = /singleton/biome/grass/chaparral/xanu,
+			BIOME_SUBHUMID = /singleton/biome/grass/riverside/xanu
+		),
+		BIOME_EQUATOR = list(
+			BIOME_ARID = /singleton/biome/grass/forest/xanu,
+			BIOME_SEMIARID = /singleton/biome/grass/forest/xanu,
+			BIOME_SUBHUMID = /singleton/biome/grass/chaparral/xanu
+		)
+	)

code/modules/overmap/exoplanets/themes/snow.dm

@@ -89,3 +89,17 @@
 			BIOME_SEMIARID = /singleton/biome/snow/adhomai/polar/eclipse
 		)
 	)
+
+/datum/exoplanet_theme/snow/tundra/xanu_himavatia
+	name = "Himavatian Tundra"
+
+	possible_biomes = list(
+		BIOME_POLAR = list(
+			BIOME_ARID = /singleton/biome/water/ice,
+			BIOME_SEMIARID = /singleton/biome/snow/xanu
+			),
+		BIOME_COOL = list(
+			BIOME_ARID = /singleton/biome/snow/xanu,
+			BIOME_SEMIARID = /singleton/biome/snow/forest/xanu
+			)
+	)