Node placement / mineral / serialization / iron freq / node_dig callback

- Node placement code moved to Lua
- Mineral system removed (added default:stone_with_coal and default:stone_with_iron).
- MapBlock and MapNode serialization updated.
- Mapgen: Frequency of iron increased.
- node_dig callback and related changes.

5 files changed, 307 insertions, 59 deletions

diff --git a/data/builtin.lua b/data/builtin.lua
index 1926d88b4..2e31c43b8 100644
--- a/data/builtin.lua
+++ b/data/builtin.lua
@@ -83,7 +83,7 @@ end
 -- Item definition helpers
 --
 
-minetest.inventorycube = function(img1, img2, img3)
+function minetest.inventorycube(img1, img2, img3)
 	img2 = img2 or img1
 	img3 = img3 or img1
 	return "[inventorycube"
@@ -92,7 +92,11 @@ minetest.inventorycube = function(img1, img2, img3)
 			.. "{" .. img3:gsub("%^", "&")
 end
 
-minetest.get_pointed_thing_position = function(pointed_thing, above)
+function minetest.pos_to_string(pos)
+	return "(" .. pos.x .. "," .. pos.y .. "," .. pos.z .. ")"
+end
+
+function minetest.get_pointed_thing_position(pointed_thing, above)
 	if pointed_thing.type == "node" then
 		if above then
 			-- The position where a node would be placed
@@ -113,31 +117,240 @@ minetest.get_pointed_thing_position = function(pointed_thing, above)
 	end
 end
 
-function minetest.item_place(itemstack, placer, pointed_thing)
-	pos = minetest.get_pointed_thing_position(pointed_thing, true)
-	if pos ~= nil then
-		item = itemstack:take_item()
-		if item ~= nil then
-			minetest.env:add_item(pos, item)
+function minetest.dir_to_facedir(dir)
+	if math.abs(dir.x) > math.abs(dir.z) then
+		if dir.x < 0 then
+			return 3
+		else
+			return 1
+		end
+	else
+		if dir.z < 0 then
+			return 2
+		else
+			return 0
+		end
+	end
+end
+
+function minetest.dir_to_wallmounted(dir)
+	if math.abs(dir.y) > math.max(math.abs(dir.x), math.abs(dir.z)) then
+		if dir.y < 0 then
+			return 1
+		else
+			return 0
+		end
+	elseif math.abs(dir.x) > math.abs(dir.z) then
+		if dir.x < 0 then
+			return 3
+		else
+			return 2
+		end
+	else
+		if dir.z < 0 then
+			return 5
+		else
+			return 4
+		end
+	end
+end
+
+function minetest.get_node_drops(nodename, toolname)
+	local drop = ItemStack({name=nodename}):get_definition().drop
+	if drop == nil then
+		-- default drop
+		print("default drop: " .. nodename)
+		return {ItemStack({name=nodename})}
+	elseif type(drop) == "string" then
+		-- itemstring drop
+		return {ItemStack(drop)}
+	elseif drop.items == nil then
+		-- drop = {} to disable default drop
+		return {}
+	end
+
+	-- Extended drop table
+	local got_items = {}
+	local got_count = 0
+	local _, item, tool
+	for _, item in ipairs(drop.items) do
+		local good_rarity = true
+		local good_tool = true
+		if item.rarity ~= nil then
+			good_rarity = item.rarity < 1 or math.random(item.rarity) == 1
+		end
+		if item.tools ~= nil then
+			good_tool = false
+			for _, tool in ipairs(item.tools) do
+				if tool:sub(1, 1) == '~' then
+					good_tool = toolname:find(tool:sub(2)) ~= nil
+				else
+					good_tool = toolname == tool
+				end
+				if good_tool then
+					break
+				end
+			end
+        	end
+		if good_rarity and good_tool then
+			got_count = got_count + 1
+			for _, add_item in ipairs(item.items) do
+				got_items[#got_items+1] = add_item
+			end
+			if drop.max_items ~= nil and got_count == drop.max_items then
+				break
+			end
 		end
 	end
+	return got_items
+end
+
+function minetest.item_place_node(itemstack, placer, pointed_thing)
+	local item = itemstack:peek_item()
+	local def = itemstack:get_definition()
+	if def.type == "node" and pointed_thing.type == "node" then
+		local pos = pointed_thing.above
+		local oldnode = minetest.env:get_node(pos)
+		local olddef = ItemStack({name=oldnode.name}):get_definition()
+
+		if not olddef.buildable_to then
+			minetest.log("info", placer:get_player_name() .. " tried to place"
+				.. " node in invalid position " .. minetest.pos_to_string(pos)
+				.. ", replacing " .. oldnode.name)
+			return
+		end
+
+		minetest.log("action", placer:get_player_name() .. " places node "
+			.. def.name .. " at " .. minetest.pos_to_string(pos))
+
+		local newnode = {name = def.name, param1 = 0, param2 = 0}
+
+		-- Calculate direction for wall mounted stuff like torches and signs
+		if def.paramtype2 == 'wallmounted' then
+			local under = pointed_thing.under
+			local above = pointed_thing.above
+			local dir = {x = under.x - above.x, y = under.y - above.y, z = under.z - above.z}
+			newnode.param2 = minetest.dir_to_wallmounted(dir)
+		-- Calculate the direction for furnaces and chests and stuff
+		elseif def.paramtype2 == 'facedir' then
+			local playerpos = placer:getpos()
+			local dir = {x = pos.x - playerpos.x, y = pos.y - playerpos.y, z = pos.z - playerpos.z}
+			newnode.param2 = minetest.dir_to_facedir(dir)
+			minetest.log("action", "facedir: " .. newnode.param2)
+		end
+
+		-- Add node and update
+		minetest.env:add_node(pos, newnode)
+
+		-- Set metadata owner
+		if def.metadata_name ~= "" then
+			minetest.env:get_meta(pos):set_owner(placer:get_player_name())
+		end
+
+		-- Run script hook
+		local _, callback
+		for _, callback in ipairs(minetest.registered_on_placenodes) do
+			callback(pos, newnode, placer)
+		end
+
+		itemstack:take_item()
+	end
+	return itemstack
+end
+
+function minetest.item_place_object(itemstack, placer, pointed_thing)
+	local pos = minetest.get_pointed_thing_position(pointed_thing, true)
+	if pos ~= nil then
+		local item = itemstack:take_item()
+		minetest.env:add_item(pos, item)
+	end
 	return itemstack
 end
 
+function minetest.item_place(itemstack, placer, pointed_thing)
+	if itemstack:get_definition().type == "node" then
+		return minetest.item_place_node(itemstack, placer, pointed_thing)
+	else
+		return minetest.item_place_object(itemstack, placer, pointed_thing)
+	end
+end
+
 function minetest.item_drop(itemstack, dropper, pos)
 	minetest.env:add_item(pos, itemstack)
 	return ""
 end
 
-function minetest.item_eat(hp_change)
+function minetest.item_eat(hp_change, replace_with_item)
 	return function(itemstack, user, pointed_thing)  -- closure
 		if itemstack:take_item() ~= nil then
 			user:set_hp(user:get_hp() + hp_change)
+			itemstack:add_item(replace_with_item) -- note: replace_with_item is optional
 		end
 		return itemstack
 	end
 end
 
+function minetest.node_punch(pos, node, puncher)
+	-- Run script hook
+	local _, callback
+	for _, callback in ipairs(minetest.registered_on_punchnodes) do
+		callback(pos, node, puncher)
+	end
+
+end
+
+function minetest.node_dig(pos, node, digger)
+	minetest.debug("node_dig")
+
+	local def = ItemStack({name=node.name}):get_definition()
+	if not def.diggable then
+		minetest.debug("not diggable")
+		minetest.log("info", digger:get_player_name() .. " tried to dig "
+			.. node.name .. " which is not diggable "
+			.. minetest.pos_to_string(pos))
+		return
+	end
+
+	local meta = minetest.env:get_meta(pos)
+	if meta ~= nil and not meta:get_allow_removal() then
+		minetest.debug("dig prevented by metadata")
+		minetest.log("info", digger:get_player_name() .. " tried to dig "
+			.. node.name .. ", but removal is disabled by metadata "
+			.. minetest.pos_to_string(pos))
+		return
+	end
+
+	minetest.log('action', digger:get_player_name() .. " digs "
+		.. node.name .. " at " .. minetest.pos_to_string(pos))
+
+	if not minetest.setting_getbool("creative_mode") then
+		local wielded = digger:get_wielded_item()
+		local drops = minetest.get_node_drops(node.name, wielded:get_name())
+
+		-- Wear out tool
+		mp = def.material
+		tp = wielded:get_tool_digging_properties()
+		dp = minetest.get_digging_properties(mp, tp)
+		wielded:add_wear(dp.wear)
+		digger:set_wielded_item(wielded)
+
+		-- Add dropped items
+		local _, dropped_item
+		for _, dropped_item in ipairs(drops) do
+			digger:get_inventory():add_item("main", dropped_item)
+		end
+	end
+
+	-- Remove node and update
+	minetest.env:remove_node(pos)
+
+	-- Run script hook
+	local _, callback
+	for _, callback in ipairs(minetest.registered_on_dignodes) do
+		callback(pos, node, digger)
+	end
+end
+
 --
 -- Item definition defaults
 --
@@ -151,16 +364,18 @@ minetest.nodedef_default = {
 	wield_image = "",
 	wield_scale = {x=1,y=1,z=1},
 	stack_max = 99,
-	dropcount = -1,
 	usable = false,
 	liquids_pointable = false,
 	tool_digging_properties = nil,
 
 	-- Interaction callbacks
-	on_place = nil, -- let C handle node placement for now
+	on_place = minetest.item_place,
 	on_drop = minetest.item_drop,
 	on_use = nil,
 
+	on_punch = minetest.node_punch,
+	on_dig = minetest.node_dig,
+
 	-- Node properties
 	drawtype = "normal",
 	visual_scale = 1.0,
@@ -172,6 +387,7 @@ minetest.nodedef_default = {
 	alpha = 255,
 	post_effect_color = {a=0, r=0, g=0, b=0},
 	paramtype = "none",
+	paramtype2 = "none",
 	is_ground_content = false,
 	sunlight_propagates = false,
 	walkable = true,
@@ -179,10 +395,6 @@ minetest.nodedef_default = {
 	diggable = true,
 	climbable = false,
 	buildable_to = false,
-	wall_mounted = false,
-	--dug_item intentionally not defined here
-	extra_dug_item = "",
-	extra_dug_item_rarity = 2,
 	metadata_name = "",
 	liquidtype = "none",
 	liquid_alternative_flowing = "",
@@ -199,6 +411,8 @@ minetest.nodedef_default = {
 		cuttability = 0,
 		flammability = 0,
 	},
+	legacy_facedir_simple = false,
+	legacy_wallmounted = false,
 }
 
 minetest.craftitemdef_default = {
@@ -369,12 +583,12 @@ function minetest.register_item(name, itemdef)
 		error("Unable to register item: Type is invalid: " .. dump(itemdef))
 	end
 
-	-- Default dug item
-	if itemdef.type == "node" and itemdef.dug_item == nil then
-		itemdef.dug_item = ItemStack({name=itemdef.name}):to_string()
+	-- Flowing liquid uses param2
+	if itemdef.type == "node" and itemdef.liquidtype == "flowing" then
+		itemdef.paramtype2 = "flowingliquid"
 	end
 
-	-- Legacy stuff
+	-- BEGIN Legacy stuff
 	if itemdef.cookresult_itemstring ~= nil and itemdef.cookresult_itemstring ~= "" then
 		minetest.register_craft({
 			type="cooking",
@@ -390,6 +604,7 @@ function minetest.register_item(name, itemdef)
 			burntime=itemdef.furnace_burntime
 		})
 	end
+	-- END Legacy stuff
 
 	-- Disable all further modifications
 	getmetatable(itemdef).__newindex = {}
@@ -408,10 +623,11 @@ end
 function minetest.register_craftitem(name, craftitemdef)
 	craftitemdef.type = "craft"
 
-	-- Legacy stuff
+	-- BEGIN Legacy stuff
 	if craftitemdef.inventory_image == nil and craftitemdef.image ~= nil then
 		craftitemdef.inventory_image = craftitemdef.image
 	end
+	-- END Legacy stuff
 
 	minetest.register_item(name, craftitemdef)
 end
@@ -420,7 +636,7 @@ function minetest.register_tool(name, tooldef)
 	tooldef.type = "tool"
 	tooldef.stack_max = 1
 
-	-- Legacy stuff
+	-- BEGIN Legacy stuff
 	if tooldef.inventory_image == nil and tooldef.image ~= nil then
 		tooldef.inventory_image = tooldef.image
 	end
@@ -450,6 +666,7 @@ function minetest.register_tool(name, tooldef)
 			dd_cuttability = tooldef.dd_cuttability,
 		}
 	end
+	-- END Legacy stuff
 
 	minetest.register_item(name, tooldef)
 end
@@ -643,4 +860,10 @@ minetest.registered_on_newplayers, minetest.register_on_newplayer = make_registr
 minetest.registered_on_dieplayers, minetest.register_on_dieplayer = make_registration()
 minetest.registered_on_respawnplayers, minetest.register_on_respawnplayer = make_registration()
 
+--
+-- Set random seed
+--
+
+math.randomseed(os.time())
+
 -- END
diff --git a/data/mods/default/init.lua b/data/mods/default/init.lua
index 8093e99d5..7c6cccd44 100644
--- a/data/mods/default/init.lua
+++ b/data/mods/default/init.lua
@@ -176,6 +176,7 @@
 -- - set_text(text) -- eg. set the text of a sign
 -- - get_text()
 -- - get_owner()
+-- - set_owner(string)
 -- Generic node metadata specific:
 -- - set_infotext(infotext)
 -- - get_inventory() -> InvRef
@@ -302,7 +303,7 @@
 --     myvariable = whatever,
 -- }
 --
--- Item definition:
+-- Item definition options (register_node, register_craftitem, register_tool)
 -- {
 --     description = "Steel Axe",
 --     inventory_image = "default_tool_steelaxe.png",
@@ -328,9 +329,9 @@
 --     on_use = func(item, user, pointed_thing),
 -- }
 --
--- Node definition options:
+-- Node definition options (register_node):
 -- {
---     <all fields from item definitions>,
+--     <all fields allowed in item definitions>,
 --     drawtype = "normal",
 --     visual_scale = 1.0,
 --     tile_images = {"default_unknown_block.png"},
@@ -341,6 +342,7 @@
 --     alpha = 255,
 --     post_effect_color = {a=0, r=0, g=0, b=0},
 --     paramtype = "none",
+--     paramtype2 = "none",
 --     is_ground_content = false,
 --     sunlight_propagates = false,
 --     walkable = true,
@@ -348,10 +350,8 @@
 --     diggable = true,
 --     climbable = false,
 --     buildable_to = false,
---     wall_mounted = false,
---     dug_item = "",
---     extra_dug_item = "",
---     extra_dug_item_rarity = 2,
+--     drop = "",
+--     -- alternatively drop = { max_items = ..., items = { ... } }
 --     metadata_name = "",
 --     liquidtype = "none",
 --     liquid_alternative_flowing = "",
@@ -368,23 +368,10 @@
 --         cuttability = 0,
 --         flammability = 0,
 --     },
---     on_drop = func(item, dropper),
---     on_place = func(item, placer, pointed_thing),
---     on_use = func(item, user, pointed_thing),
+--     legacy_facedir_simple = false, -- Support maps made in and before January 2012
+--     legacy_wallmounted = false, -- Support maps made in and before January 2012
 -- }
 --
--- Craftitem definition options:
--- {
---     description = <tooltip text>,
---     inventory_image = "default_unknown_block.png",
---     wield_image = "",
---     stack_max = <maximum number of items in stack>,
---     liquids_pointable = <whether can point liquids>,
---     on_drop = func(item, dropper),
---     on_place = func(item, placer, pointed_thing),
---     on_use = func(item, user, pointed_thing),
--- }
--- 
 -- Recipe:
 -- {
 --     output = 'default:pick_stone',
@@ -1111,10 +1098,26 @@ minetest.register_craft({
 minetest.register_node("default:stone", {
 	description = "Stone",
 	tile_images = {"default_stone.png"},
-	paramtype = "mineral",
 	is_ground_content = true,
 	material = minetest.digprop_stonelike(1.0),
-	dug_item = 'node "default:cobble" 1',
+	drop = 'default:cobble',
+	legacy_mineral = true,
+})
+
+minetest.register_node("default:stone_with_coal", {
+	description = "Stone with coal",
+	tile_images = {"default_stone.png^default_mineral_coal.png"},
+	is_ground_content = true,
+	material = minetest.digprop_stonelike(1.0),
+	drop = 'default:coal_lump',
+})
+
+minetest.register_node("default:stone_with_iron", {
+	description = "Stone with iron",
+	tile_images = {"default_stone.png^default_mineral_iron.png"},
+	is_ground_content = true,
+	material = minetest.digprop_stonelike(1.0),
+	drop = 'default:iron_lump',
 })
 
 minetest.register_node("default:dirt_with_grass", {
@@ -1122,7 +1125,7 @@ minetest.register_node("default:dirt_with_grass", {
 	tile_images = {"default_grass.png", "default_dirt.png", "default_dirt.png^default_grass_side.png"},
 	is_ground_content = true,
 	material = minetest.digprop_dirtlike(1.0),
-	dug_item = 'node "default:dirt" 1',
+	drop = 'default:dirt',
 })
 
 minetest.register_node("default:dirt_with_grass_footsteps", {
@@ -1130,7 +1133,7 @@ minetest.register_node("default:dirt_with_grass_footsteps", {
 	tile_images = {"default_grass_footsteps.png", "default_dirt.png", "default_dirt.png^default_grass_side.png"},
 	is_ground_content = true,
 	material = minetest.digprop_dirtlike(1.0),
-	dug_item = 'node "default:dirt" 1',
+	drop = 'default:dirt',
 })
 
 minetest.register_node("default:dirt", {
@@ -1159,7 +1162,7 @@ minetest.register_node("default:sandstone", {
 	tile_images = {"default_sandstone.png"},
 	is_ground_content = true,
 	material = minetest.digprop_dirtlike(1.0),  -- FIXME should this be stonelike?
-	dug_item = 'node "default:sand" 1',  -- FIXME is this intentional?
+	drop = 'default:sand',
 })
 
 minetest.register_node("default:clay", {
@@ -1167,7 +1170,7 @@ minetest.register_node("default:clay", {
 	tile_images = {"default_clay.png"},
 	is_ground_content = true,
 	material = minetest.digprop_dirtlike(1.0),
-	dug_item = 'craft "default:clay_lump" 4',
+	drop = 'default:clay_lump 4',
 })
 
 minetest.register_node("default:brick", {
@@ -1175,7 +1178,7 @@ minetest.register_node("default:brick", {
 	tile_images = {"default_brick.png"},
 	is_ground_content = true,
 	material = minetest.digprop_stonelike(1.0),
-	dug_item = 'craft "default:clay_brick" 4',
+	drop = 'default:clay_brick 4',
 })
 
 minetest.register_node("default:tree", {
@@ -1211,8 +1214,21 @@ minetest.register_node("default:leaves", {
 	tile_images = {"default_leaves.png"},
 	paramtype = "light",
 	material = minetest.digprop_leaveslike(1.0),
-	extra_dug_item = 'node "default:sapling" 1',
-	extra_dug_item_rarity = 20,
+	drop = {
+		max_items = 1,
+		items = {
+			{
+				-- player will get sapling with 1/20 chance
+				items = {'default:sapling'},
+				rarity = 20,
+			},
+			{
+				-- player will get leaves only if he get no saplings,
+				-- this is because max_items is 1
+				items = {'default:leaves'},
+			}
+		}
+	},
 })
 
 minetest.register_node("default:cactus", {
@@ -1290,8 +1306,8 @@ minetest.register_node("default:ladder", {
 	inventory_image = "default_ladder.png",
 	wield_image = "default_ladder.png",
 	paramtype = "light",
+	paramtype2 = "wallmounted",
 	is_ground_content = true,
-	wall_mounted = true,
 	walkable = false,
 	climbable = true,
 	selection_box = {
@@ -1301,6 +1317,7 @@ minetest.register_node("default:ladder", {
 		--wall_side = = <default>
 	},
 	material = minetest.digprop_woodlike(0.5),
+	legacy_wallmounted = true,
 })
 
 minetest.register_node("default:wood", {
@@ -1420,9 +1437,9 @@ minetest.register_node("default:torch", {
 	inventory_image = "default_torch_on_floor.png",
 	wield_image = "default_torch_on_floor.png",
 	paramtype = "light",
+	paramtype2 = "wallmounted",
 	sunlight_propagates = true,
 	walkable = false,
-	wall_mounted = true,
 	light_source = LIGHT_MAX-1,
 	selection_box = {
 		type = "wallmounted",
@@ -1431,6 +1448,7 @@ minetest.register_node("default:torch", {
 		wall_side = {-0.5, -0.3, -0.1, -0.5+0.3, 0.3, 0.1},
 	},
 	material = minetest.digprop_constanttime(0.0),
+	legacy_wallmounted = true,
 })
 
 minetest.register_node("default:sign_wall", {
@@ -1440,9 +1458,9 @@ minetest.register_node("default:sign_wall", {
 	inventory_image = "default_sign_wall.png",
 	wield_image = "default_sign_wall.png",
 	paramtype = "light",
+	paramtype2 = "wallmounted",
 	sunlight_propagates = true,
 	walkable = false,
-	wall_mounted = true,
 	metadata_name = "sign",
 	selection_box = {
 		type = "wallmounted",
@@ -1451,33 +1469,37 @@ minetest.register_node("default:sign_wall", {
 		--wall_side = <default>
 	},
 	material = minetest.digprop_constanttime(0.5),
+	legacy_wallmounted = true,
 })
 
 minetest.register_node("default:chest", {
 	description = "Chest",
 	tile_images = {"default_chest_top.png", "default_chest_top.png", "default_chest_side.png",
 		"default_chest_side.png", "default_chest_side.png", "default_chest_front.png"},
-	paramtype = "facedir_simple",
+	paramtype2 = "facedir",
 	metadata_name = "chest",
 	material = minetest.digprop_woodlike(1.0),
+	legacy_facedir_simple = true,
 })
 
 minetest.register_node("default:chest_locked", {
 	description = "Locked Chest",
 	tile_images = {"default_chest_top.png", "default_chest_top.png", "default_chest_side.png",
 		"default_chest_side.png", "default_chest_side.png", "default_chest_lock.png"},
-	paramtype = "facedir_simple",
+	paramtype2 = "facedir",
 	metadata_name = "locked_chest",
 	material = minetest.digprop_woodlike(1.0),
+	legacy_facedir_simple = true,
 })
 
 minetest.register_node("default:furnace", {
 	description = "Furnace",
 	tile_images = {"default_furnace_side.png", "default_furnace_side.png", "default_furnace_side.png",
 		"default_furnace_side.png", "default_furnace_side.png", "default_furnace_front.png"},
-	paramtype = "facedir_simple",
+	paramtype2 = "facedir",
 	metadata_name = "furnace",
 	material = minetest.digprop_stonelike(3.0),
+	legacy_facedir_simple = true,
 })
 
 minetest.register_node("default:cobble", {
@@ -1506,8 +1528,9 @@ minetest.register_node("default:nyancat", {
 	tile_images = {"default_nc_side.png", "default_nc_side.png", "default_nc_side.png",
 		"default_nc_side.png", "default_nc_back.png", "default_nc_front.png"},
 	inventory_image = "default_nc_front.png",
-	paramtype = "facedir_simple",
+	paramtype2 = "facedir",
 	material = minetest.digprop_stonelike(3.0),
+	legacy_facedir_simple = true,
 })
 
 minetest.register_node("default:nyancat_rainbow", {
diff --git a/data/mods/legacy/textures/mineral_coal.png b/data/mods/default/textures/default_mineral_coal.png
index 3ff9692fb..3ff9692fb 100644
--- a/data/mods/legacy/textures/mineral_coal.png
+++ b/data/mods/default/textures/default_mineral_coal.png
diff --git a/data/mods/legacy/textures/mineral_iron.png b/data/mods/default/textures/default_mineral_iron.png
index 51b15d95d..51b15d95d 100644
--- a/data/mods/legacy/textures/mineral_iron.png
+++ b/data/mods/default/textures/default_mineral_iron.png
diff --git a/data/mods/legacy/init.lua b/data/mods/legacy/init.lua
index 127b0e17f..7f9088ce0 100644
--- a/data/mods/legacy/init.lua
+++ b/data/mods/legacy/init.lua
@@ -6,6 +6,8 @@
 --
 
 minetest.register_alias("stone", "default:stone")
+minetest.register_alias("stone_with_coal", "default:stone_with_coal")
+minetest.register_alias("stone_with_iron", "default:stone_with_iron")
 minetest.register_alias("dirt_with_grass", "default:dirt_with_grass")
 minetest.register_alias("dirt_with_grass_footsteps", "default:dirt_with_grass_footsteps")
 minetest.register_alias("dirt", "default:dirt")