Add 'dry dirt' and 'dry dirt with dry grass' nodes for savanna biome

mods/default/README.txt

@@ -129,6 +129,7 @@ TumeniNodes (CC BY-SA 3.0):
   default_coniferous_litter.png
   default_coniferous_litter_side.png
   default_grass.png
+  default_dry_dirt.png
 
 BlockMen (CC BY-SA 3.0):
   default_aspen_leaves.png -- Derived from Sofar's texture

mods/default/functions.lua

@@ -477,7 +477,6 @@ minetest.register_abm({
 	neighbors = {
 		"air",
 		"group:grass",
-		"group:dry_grass",
 		"default:snow",
 	},
 	interval = 6,
@@ -504,11 +503,8 @@ minetest.register_abm({
 		-- Snow check is cheapest, so comes first
 		if name == "default:snow" then
 			minetest.set_node(pos, {name = "default:dirt_with_snow"})
-		-- Most likely case first
 		elseif minetest.get_item_group(name, "grass") ~= 0 then
 			minetest.set_node(pos, {name = "default:dirt_with_grass"})
-		elseif minetest.get_item_group(name, "dry_grass") ~= 0 then
-			minetest.set_node(pos, {name = "default:dirt_with_dry_grass"})
 		end
 	end
 })
@@ -520,7 +516,7 @@ minetest.register_abm({
 
 minetest.register_abm({
 	label = "Grass covered",
-	nodenames = {"group:spreading_dirt_type"},
+	nodenames = {"group:spreading_dirt_type", "default:dry_dirt_with_dry_grass"},
 	interval = 8,
 	chance = 50,
 	catch_up = false,
@@ -531,7 +527,11 @@ minetest.register_abm({
 		if name ~= "ignore" and nodedef and not ((nodedef.sunlight_propagates or
 				nodedef.paramtype == "light") and
 				nodedef.liquidtype == "none") then
-			minetest.set_node(pos, {name = "default:dirt"})
+			if node.name == "default:dry_dirt_with_dry_grass" then
+				minetest.set_node(pos, {name = "default:dry_dirt"})
+			else
+				minetest.set_node(pos, {name = "default:dirt"})
+			end
 		end
 	end
 })

mods/default/mapgen.lua

@@ -575,8 +575,8 @@ function default.register_ores()
 		},
 		-- Only where default:dirt is present as surface material
 		biomes = {"taiga", "snowy_grassland", "grassland", "coniferous_forest",
-			"deciduous_forest", "deciduous_forest_shore", "savanna", "savanna_shore",
-			"rainforest", "rainforest_swamp", "floatland_coniferous_forest"}
+				"deciduous_forest", "deciduous_forest_shore", "rainforest",
+				"rainforest_swamp", "floatland_coniferous_forest"}
 	})
 
 	-- Gravel
@@ -1487,9 +1487,9 @@ function default.register_biomes(upper_limit)
 
 	minetest.register_biome({
 		name = "savanna",
-		node_top = "default:dirt_with_dry_grass",
+		node_top = "default:dry_dirt_with_dry_grass",
 		depth_top = 1,
-		node_filler = "default:dirt",
+		node_filler = "default:dry_dirt",
 		depth_filler = 1,
 		node_riverbed = "default:sand",
 		depth_riverbed = 2,
@@ -1504,9 +1504,9 @@ function default.register_biomes(upper_limit)
 
 	minetest.register_biome({
 		name = "savanna_shore",
-		node_top = "default:dirt",
+		node_top = "default:dry_dirt",
 		depth_top = 1,
-		node_filler = "default:dirt",
+		node_filler = "default:dry_dirt",
 		depth_filler = 3,
 		node_riverbed = "default:sand",
 		depth_riverbed = 2,
@@ -1798,7 +1798,7 @@ local function register_dry_grass_decoration(offset, scale, length)
 	minetest.register_decoration({
 		name = "default:dry_grass_" .. length,
 		deco_type = "simple",
-		place_on = {"default:dirt_with_dry_grass"},
+		place_on = {"default:dry_dirt_with_dry_grass"},
 		sidelen = 16,
 		noise_params = {
 			offset = offset,
@@ -2012,7 +2012,7 @@ function default.register_decorations()
 	minetest.register_decoration({
 		name = "default:acacia_tree",
 		deco_type = "schematic",
-		place_on = {"default:dirt_with_dry_grass"},
+		place_on = {"default:dry_dirt_with_dry_grass"},
 		sidelen = 16,
 		noise_params = {
 			offset = 0,
@@ -2033,7 +2033,7 @@ function default.register_decorations()
 	minetest.register_decoration({
 		name = "default:acacia_log",
 		deco_type = "schematic",
-		place_on = {"default:dirt_with_dry_grass"},
+		place_on = {"default:dry_dirt_with_dry_grass"},
 		place_offset_y = 1,
 		sidelen = 16,
 		noise_params = {
@@ -2050,7 +2050,7 @@ function default.register_decorations()
 		schematic = minetest.get_modpath("default") .. "/schematics/acacia_log.mts",
 		flags = "place_center_x",
 		rotation = "random",
-		spawn_by = "default:dirt_with_dry_grass",
+		spawn_by = "default:dry_dirt_with_dry_grass",
 		num_spawn_by = 8,
 	})
 
@@ -2218,7 +2218,7 @@ function default.register_decorations()
 	minetest.register_decoration({
 		name = "default:acacia_bush",
 		deco_type = "schematic",
-		place_on = {"default:dirt_with_dry_grass"},
+		place_on = {"default:dry_dirt_with_dry_grass"},
 		sidelen = 16,
 		noise_params = {
 			offset = -0.004,

mods/default/nodes.lua

@@ -52,6 +52,8 @@ default:dirt_with_dry_grass
 default:dirt_with_snow
 default:dirt_with_rainforest_litter
 default:dirt_with_coniferous_litter
+default:dry_dirt
+default:dry_dirt_with_dry_grass
 
 default:permafrost
 default:permafrost_with_stones
@@ -459,7 +461,7 @@ minetest.register_node("default:dirt_with_dry_grass", {
 		"default_dirt.png",
 		{name = "default_dirt.png^default_dry_grass_side.png",
 			tileable_vertical = false}},
-	groups = {crumbly = 3, soil = 1, spreading_dirt_type = 1},
+	groups = {crumbly = 3, soil = 1},
 	drop = 'default:dirt',
 	sounds = default.node_sound_dirt_defaults({
 		footstep = {name = "default_grass_footstep", gain = 0.4},
@@ -508,6 +510,25 @@ minetest.register_node("default:dirt_with_coniferous_litter", {
 	}),
 })
 
+minetest.register_node("default:dry_dirt", {
+	description = "Dry Dirt",
+	tiles = {"default_dry_dirt.png"},
+	groups = {crumbly = 3, soil = 1},
+	sounds = default.node_sound_dirt_defaults(),
+})
+
+minetest.register_node("default:dry_dirt_with_dry_grass", {
+	description = "Dry Dirt with Dry Grass",
+	tiles = {"default_dry_grass.png", "default_dry_dirt.png",
+		{name = "default_dry_dirt.png^default_dry_grass_side.png",
+			tileable_vertical = false}},
+	groups = {crumbly = 3, soil = 1},
+	drop = "default:dry_dirt",
+	sounds = default.node_sound_dirt_defaults({
+		footstep = {name = "default_grass_footstep", gain = 0.4},
+	}),
+})
+
 minetest.register_node("default:permafrost", {
 	description = "Permafrost",
 	tiles = {"default_permafrost.png"},

mods/farming/nodes.lua

@@ -38,6 +38,22 @@ minetest.override_item("default:dirt_with_coniferous_litter", {
 	}
 })
 
+minetest.override_item("default:dry_dirt", {
+	soil = {
+		base = "default:dry_dirt",
+		dry = "farming:dry_soil",
+		wet = "farming:dry_soil_wet"
+	}
+})
+
+minetest.override_item("default:dry_dirt_with_dry_grass", {
+	soil = {
+		base = "default:dry_dirt_with_dry_grass",
+		dry = "farming:dry_soil",
+		wet = "farming:dry_soil_wet"
+	}
+})
+
 minetest.register_node("farming:soil", {
 	description = "Soil",
 	tiles = {"default_dirt.png^farming_soil.png", "default_dirt.png"},
@@ -64,6 +80,32 @@ minetest.register_node("farming:soil_wet", {
 	}
 })
 
+minetest.register_node("farming:dry_soil", {
+	description = "Dry Soil",
+	tiles = {"default_dry_dirt.png^farming_soil.png", "default_dry_dirt.png"},
+	drop = "default:dry_dirt",
+	groups = {crumbly=3, not_in_creative_inventory=1, soil=2, grassland = 1, field = 1},
+	sounds = default.node_sound_dirt_defaults(),
+	soil = {
+		base = "default:dry_dirt",
+		dry = "farming:dry_soil",
+		wet = "farming:dry_soil_wet"
+	}
+})
+
+minetest.register_node("farming:dry_soil_wet", {
+	description = "Wet Dry Soil",
+	tiles = {"default_dry_dirt.png^farming_soil_wet.png", "default_dry_dirt.png^farming_soil_wet_side.png"},
+	drop = "default:dry_dirt",
+	groups = {crumbly=3, not_in_creative_inventory=1, soil=3, wet = 1, grassland = 1, field = 1},
+	sounds = default.node_sound_dirt_defaults(),
+	soil = {
+		base = "default:dry_dirt",
+		dry = "farming:dry_soil",
+		wet = "farming:dry_soil_wet"
+	}
+})
+
 minetest.override_item("default:desert_sand", {
 	groups = {crumbly=3, falling_node=1, sand=1, soil = 1},
 	soil = {