add a config setting to greatly reduce flooded caves

biomes/level1.lua

@@ -11,8 +11,6 @@ local c_cobble_fungus = minetest.get_content_id("dfcaverns:cobble_with_floor_fun
 local c_wet_flowstone = minetest.get_content_id("dfcaverns:wet_flowstone")
 local c_dry_flowstone = minetest.get_content_id("dfcaverns:dry_flowstone")
 
-local subsea_level = (dfcaverns.config.ymax - dfcaverns.config.level1_min) * 0.3 + dfcaverns.config.level1_min
-
 local c_sweet_pod = minetest.get_content_id("dfcaverns:sweet_pod_6") -- param2 = 0
 local c_quarry_bush = minetest.get_content_id("dfcaverns:quarry_bush_5") -- param2 = 4
 local c_plump_helmet = minetest.get_content_id("dfcaverns:plump_helmet_4") -- param2 = 0-3
@@ -22,6 +20,9 @@ local c_cave_wheat = minetest.get_content_id("dfcaverns:cave_wheat_8") -- param2
 local c_dead_fungus = minetest.get_content_id("dfcaverns:dead_fungus") -- param2 = 0
 local c_cavern_fungi = minetest.get_content_id("dfcaverns:cavern_fungi") -- param2 = 0
 
+local subsea_level = (dfcaverns.config.ymax - dfcaverns.config.level1_min) * 0.3 + dfcaverns.config.level1_min
+local flooded_biomes = dfcaverns.config.flooded_biomes
+
 local level_1_tower_cap_floor = function(area, data, ai, vi, bi, param2_data)
 	if data[bi] ~= c_stone then
 		return
@@ -161,11 +162,17 @@ local level_1_underwater_floor = function(area, data, ai, vi, bi, param2_data)
 	else
 		data[bi] = c_dirt
 	end
-	if data[vi] == c_air then
-		data[vi] = c_water
-	end
-	if data[ai] == c_air then
-		data[ai] = c_water
+	if flooded_biomes then
+		if data[vi] == c_air then
+			data[vi] = c_water
+		end
+		if data[ai] == c_air then
+			data[ai] = c_water
+		end
+	elseif math.random() < 0.01 then
+		if data[vi] == c_air then
+			data[vi] = c_water
+		end
 	end
 end
 
@@ -209,6 +216,12 @@ end
 
 -------------------------------------------------------------------------------------------
 
+local c_flood_fill
+if flooded_biomes then
+	c_flood_fill = c_water
+else
+	c_flood_fill = c_air
+end
 
 minetest.register_biome({
 	name = "dfcaverns_level1_flooded_biome_lower",
@@ -217,7 +230,7 @@ minetest.register_biome({
 	heat_point = 50,
 	humidity_point = 100,
 	_subterrane_fill_node = c_air,
-	_subterrane_cave_fill_node = c_water,
+	_subterrane_cave_fill_node = c_flood_fill,
 	_subterrane_floor_decor = level_1_underwater_floor,
 	_subterrane_mitigate_lava = true,
 })
@@ -231,7 +244,7 @@ minetest.register_biome({
 	_subterrane_ceiling_decor = level_1_moist_ceiling,
 	_subterrane_floor_decor = level_1_wet_floor,
 	_subterrane_fill_node = c_air,
-	_subterrane_cave_fill_node = c_water,
+	_subterrane_cave_fill_node = c_flood_fill,
 	_subterrane_mitigate_lava = true,
 })
 
@@ -298,7 +311,7 @@ minetest.register_biome({
 	heat_point = 20,
 	humidity_point = 80,
 	_subterrane_fill_node = c_air,
-	_subterrane_cave_fill_node = c_water,
+	_subterrane_cave_fill_node = c_flood_fill,
 	_subterrane_floor_decor = level_1_underwater_floor,
 	_subterrane_mitigate_lava = true,
 })
@@ -325,7 +338,7 @@ minetest.register_biome({
 	heat_point = 80,
 	humidity_point = 80,
 	_subterrane_fill_node = c_air,
-	_subterrane_cave_fill_node = c_water,
+	_subterrane_cave_fill_node = c_flood_fill,
 	_subterrane_floor_decor = level_1_underwater_floor,
 	_subterrane_mitigate_lava = true,
 })

biomes/level2.lua

@@ -18,7 +18,6 @@ local c_cobble_fungus = minetest.get_content_id("dfcaverns:cobble_with_floor_fun
 local c_wet_flowstone = minetest.get_content_id("dfcaverns:wet_flowstone")
 local c_dry_flowstone = minetest.get_content_id("dfcaverns:dry_flowstone")
 
-
 local c_sweet_pod = minetest.get_content_id("dfcaverns:sweet_pod_6") -- param2 = 0
 local c_quarry_bush = minetest.get_content_id("dfcaverns:quarry_bush_5") -- param2 = 4
 local c_plump_helmet = minetest.get_content_id("dfcaverns:plump_helmet_4") -- param2 = 0-3
@@ -29,7 +28,7 @@ local c_dead_fungus = minetest.get_content_id("dfcaverns:dead_fungus") -- param2
 local c_cavern_fungi = minetest.get_content_id("dfcaverns:cavern_fungi") -- param2 = 0
 
 local subsea_level = (dfcaverns.config.level1_min - dfcaverns.config.level2_min) * 0.3 + dfcaverns.config.level2_min
-
+local flooded_biomes = dfcaverns.config.flooded_biomes
 
 local level_2_tower_cap_floor = function(area, data, ai, vi, bi, param2_data)
 	if data[bi] ~= c_stone then
@@ -296,8 +295,19 @@ local level_2_underwater_floor = function(area, data, ai, vi, bi, param2_data)
 		return
 	end
 	data[bi] = c_dirt
-	if data[vi] == c_air then data[vi] = c_water end
-	if data[ai] == c_air then data[ai] = c_water end
+	
+	if flooded_biomes then
+		if data[vi] == c_air then
+			data[vi] = c_water
+		end
+		if data[ai] == c_air then
+			data[ai] = c_water
+		end
+	elseif math.random() < 0.01 then
+		if data[vi] == c_air then
+			data[vi] = c_water
+		end
+	end
 end
 
 local level_2_cave_floor = function(area, data, ai, vi, bi, param2_data)
@@ -339,6 +349,12 @@ end
 
 -------------------------------------------------------------------------------------------
 
+local c_flood_fill
+if flooded_biomes then
+	c_flood_fill = c_water
+else
+	c_flood_fill = c_air
+end
 
 minetest.register_biome({
 	name = "dfcaverns_level2_flooded_biome_lower",
@@ -347,7 +363,7 @@ minetest.register_biome({
 	heat_point = 50,
 	humidity_point = 90,
 	_subterrane_fill_node = c_air,
-	_subterrane_cave_fill_node = c_water,
+	_subterrane_cave_fill_node = c_flood_fill,
 	_subterrane_floor_decor = level_2_underwater_floor,
 	_subterrane_mitigate_lava = false,
 })
@@ -361,7 +377,7 @@ minetest.register_biome({
 	_subterrane_ceiling_decor = level_2_moist_ceiling,
 	_subterrane_floor_decor = level_2_wet_floor,
 	_subterrane_fill_node = c_air,
-	_subterrane_cave_fill_node = c_water,
+	_subterrane_cave_fill_node = c_flood_fill,
 	_subterrane_mitigate_lava = true,
 })
 

biomes/level3.lua

@@ -34,6 +34,7 @@ local c_dead_fungus = minetest.get_content_id("dfcaverns:dead_fungus") -- param2
 local c_cavern_fungi = minetest.get_content_id("dfcaverns:cavern_fungi") -- param2 = 0
 
 local subsea_level = (dfcaverns.config.level2_min - dfcaverns.config.level3_min) * 0.3 + dfcaverns.config.level3_min
+local flooded_biomes = dfcaverns.config.flooded_biomes
 
 local level_3_moist_ceiling = function(area, data, ai, vi, bi, param2_data)
 	if data[ai] ~= c_stone then
@@ -128,8 +129,19 @@ local level_3_underwater_floor = function(area, data, ai, vi, bi, param2_data)
 		return
 	end
 	data[bi] = c_dirt
-	if data[vi] == c_air then data[vi] = c_water end
-	if data[ai] == c_air then data[ai] = c_water end
+
+	if flooded_biomes then
+		if data[vi] == c_air then
+			data[vi] = c_water
+		end
+		if data[ai] == c_air then
+			data[ai] = c_water
+		end
+	elseif math.random() < 0.01 then
+		if data[vi] == c_air then
+			data[vi] = c_water
+		end
+	end
 end
 
 local level_3_dry_ceiling = function(area, data, ai, vi, bi, param2_data)
@@ -373,6 +385,12 @@ end
 
 -------------------------------------------------------------------------------------------
 
+local c_flood_fill
+if flooded_biomes then
+	c_flood_fill = c_water
+else
+	c_flood_fill = c_air
+end
 
 minetest.register_biome({
 	name = "dfcaverns_level3_flooded_biome_lower",
@@ -394,7 +412,7 @@ minetest.register_biome({
 	_subterrane_ceiling_decor = level_3_moist_ceiling,
 	_subterrane_floor_decor = level_3_wet_floor,
 	_subterrane_fill_node = c_air,
-	_subterrane_cave_fill_node = c_water,
+	_subterrane_cave_fill_node = c_flood_fill,
 	_subterrane_mitigate_lava = true,
 })
 

config.lua

@@ -83,6 +83,8 @@ setting("int", "lava_sea_min", -3500, "Lower limit of the lava sea")
 setting("float", "lava_sea_threshold", 0.2, "Cavern threshold for sunless and magma seas (higher number means sparser magma)")
 setting("bool", "enable_lava_sea", true, "Enable magma sea level")
 
+setting("bool", "flooded_biomes", true, "Add a lot of water to the most humid cavern biomes")
+
 if minetest.get_modpath("tnt") then
 	dfcaverns.config.enable_tnt = minetest.settings:get_bool("enable_tnt")
 	if dfcaverns.config.enable_tnt == nil then

settingtypes.txt

@@ -48,4 +48,7 @@ dfcaverns_lava_sea_min (Lower limit of the lava sea) int -3500
 #Determines threshold for lower sea cave generation. Higher number means sparser cavern
 dfcaverns_lava_sea_threshold (Cavern threshold for magma sea) float 0.2 0.0 1.0
 #When true, the lava sea level is generated
-dfcaverns_enable_lava_sea (Lower sea is lava) bool true
+dfcaverns_enable_lava_sea (Lower sea is lava) bool true
+#When true cavern biomes at the most extreme humidity range will be flooded
+#with water, providing significant challenges in those areas.
+dfcaverns_flooded_biomes (Add a lot of water to the most humid cavern biomes) bool true