initial commit - cross reference with 5th port - obviously has compile errors

code/modules/procedural_mapping/mapGeneratorModules/helpers.dm

@@ -0,0 +1,40 @@
+//Helper Modules
+
+
+// Helper to repressurize the area in case it was run in space
+/datum/mapGeneratorModule/bottomLayer/repressurize
+	spawnableAtoms = list()
+	spawnableTurfs = list()
+
+/datum/mapGeneratorModule/bottomLayer/repressurize/generate()
+	if(!mother)
+		return
+	var/list/map = mother.map
+	for(var/turf/T in map)
+		SSair.remove_from_active(T)
+	for(var/turf/open/T in map)
+		if(T.air)
+			T.air.copy_from_turf(T)
+		SSair.add_to_active(T)
+
+//Only places atoms/turfs on area borders
+/datum/mapGeneratorModule/border
+	clusterCheckFlags = CLUSTER_CHECK_NONE
+
+/datum/mapGeneratorModule/border/generate()
+	if(!mother)
+		return
+	var/list/map = mother.map
+	for(var/turf/T in map)
+		if(is_border(T))
+			place(T)
+
+/datum/mapGeneratorModule/border/proc/is_border(turf/T)
+	for(var/direction in list(SOUTH,EAST,WEST,NORTH))
+		if (get_step(T,direction) in mother.map)
+			continue
+		return 1
+	return 0
+
+/datum/mapGenerator/repressurize
+	modules = list(/datum/mapGeneratorModule/bottomLayer/repressurize)

code/modules/procedural_mapping/mapGeneratorModules/nature.dm

@@ -0,0 +1,37 @@
+
+//Contents exist primarily for the nature generator test type.
+
+
+//Pine Trees
+/datum/mapGeneratorModule/pineTrees
+	spawnableAtoms = list(/obj/structure/flora/tree/pine = 30)
+
+//Dead Trees
+/datum/mapGeneratorModule/deadTrees
+	spawnableAtoms = list(/obj/structure/flora/tree/dead = 10)
+
+//Random assortment of bushes
+/datum/mapGeneratorModule/randBushes
+	spawnableAtoms = list()
+
+/datum/mapGeneratorModule/randBushes/New()
+	..()
+	spawnableAtoms = typesof(/obj/structure/flora/ausbushes)
+	for(var/i in spawnableAtoms)
+		spawnableAtoms[i] = 20
+
+
+//Random assortment of rocks and rockpiles
+/datum/mapGeneratorModule/randRocks
+	spawnableAtoms = list(/obj/structure/flora/rock = 40, /obj/structure/flora/rock/pile = 20)
+
+
+//Grass turfs
+/datum/mapGeneratorModule/bottomLayer/grassTurfs
+	spawnableTurfs = list(/turf/open/floor/grass = 100)
+
+
+//Grass tufts with a high spawn chance
+/datum/mapGeneratorModule/denseLayer/grassTufts
+	spawnableTurfs = list()
+	spawnableAtoms = list(/obj/structure/flora/ausbushes/grassybush = 75)