]> git.lizzy.rs Git - dragonfireclient.git/blobdiff - games/minimal/mods/default/init.lua
Add minetest.swap_node
[dragonfireclient.git] / games / minimal / mods / default / init.lua
index d8067d211b237b97b90fd15e773e56aa99cac151..038bf9abc51754964626864e9d045855b78bb134 100644 (file)
@@ -712,7 +712,6 @@ end
 minetest.register_node("default:stone", {
        description = "Stone",
        tiles ={"default_stone.png"},
-       is_ground_content = true,
        groups = {cracky=3},
        drop = 'default:cobble',
        legacy_mineral = true,
@@ -722,7 +721,6 @@ minetest.register_node("default:stone", {
 minetest.register_node("default:stone_with_coal", {
        description = "Stone with coal",
        tiles ={"default_stone.png^default_mineral_coal.png"},
-       is_ground_content = true,
        groups = {cracky=3},
        drop = 'default:coal_lump',
        sounds = default.node_sound_stone_defaults(),
@@ -731,7 +729,6 @@ minetest.register_node("default:stone_with_coal", {
 minetest.register_node("default:stone_with_iron", {
        description = "Stone with iron",
        tiles ={"default_stone.png^default_mineral_iron.png"},
-       is_ground_content = true,
        groups = {cracky=3},
        drop = 'default:iron_lump',
        sounds = default.node_sound_stone_defaults(),
@@ -740,8 +737,7 @@ minetest.register_node("default:stone_with_iron", {
 minetest.register_node("default:dirt_with_grass", {
        description = "Dirt with grass",
        tiles ={"default_grass.png", "default_dirt.png", "default_dirt.png^default_grass_side.png"},
-       is_ground_content = true,
-       groups = {crumbly=3},
+       groups = {crumbly=3, soil=1},
        drop = 'default:dirt',
        sounds = default.node_sound_dirt_defaults({
                footstep = {name="default_grass_footstep", gain=0.4},
@@ -751,8 +747,7 @@ minetest.register_node("default:dirt_with_grass", {
 minetest.register_node("default:dirt_with_grass_footsteps", {
        description = "Dirt with grass and footsteps",
        tiles ={"default_grass_footsteps.png", "default_dirt.png", "default_dirt.png^default_grass_side.png"},
-       is_ground_content = true,
-       groups = {crumbly=3},
+       groups = {crumbly=3, soil=1},
        drop = 'default:dirt',
        sounds = default.node_sound_dirt_defaults({
                footstep = {name="default_grass_footstep", gain=0.4},
@@ -762,15 +757,13 @@ minetest.register_node("default:dirt_with_grass_footsteps", {
 minetest.register_node("default:dirt", {
        description = "Dirt",
        tiles ={"default_dirt.png"},
-       is_ground_content = true,
-       groups = {crumbly=3},
+       groups = {crumbly=3, soil=1},
        sounds = default.node_sound_dirt_defaults(),
 })
 
 minetest.register_node("default:sand", {
        description = "Sand",
        tiles ={"default_sand.png"},
-       is_ground_content = true,
        groups = {crumbly=3, falling_node=1},
        sounds = default.node_sound_sand_defaults(),
 })
@@ -778,7 +771,6 @@ minetest.register_node("default:sand", {
 minetest.register_node("default:gravel", {
        description = "Gravel",
        tiles ={"default_gravel.png"},
-       is_ground_content = true,
        groups = {crumbly=2, falling_node=1},
        sounds = default.node_sound_dirt_defaults({
                footstep = {name="default_gravel_footstep", gain=0.45},
@@ -788,7 +780,6 @@ minetest.register_node("default:gravel", {
 minetest.register_node("default:sandstone", {
        description = "Sandstone",
        tiles ={"default_sandstone.png"},
-       is_ground_content = true,
        groups = {crumbly=2,cracky=2},
        drop = 'default:sand',
        sounds = default.node_sound_stone_defaults(),
@@ -797,7 +788,6 @@ minetest.register_node("default:sandstone", {
 minetest.register_node("default:clay", {
        description = "Clay",
        tiles ={"default_clay.png"},
-       is_ground_content = true,
        groups = {crumbly=3},
        drop = 'default:clay_lump 4',
        sounds = default.node_sound_dirt_defaults({
@@ -808,7 +798,6 @@ minetest.register_node("default:clay", {
 minetest.register_node("default:brick", {
        description = "Brick",
        tiles ={"default_brick.png"},
-       is_ground_content = true,
        groups = {cracky=3},
        drop = 'default:clay_brick 4',
        sounds = default.node_sound_stone_defaults(),
@@ -817,7 +806,6 @@ minetest.register_node("default:brick", {
 minetest.register_node("default:tree", {
        description = "Tree",
        tiles ={"default_tree_top.png", "default_tree_top.png", "default_tree.png"},
-       is_ground_content = true,
        groups = {snappy=2,choppy=2,oddly_breakable_by_hand=1},
        sounds = default.node_sound_wood_defaults(),
 })
@@ -825,7 +813,6 @@ minetest.register_node("default:tree", {
 minetest.register_node("default:jungletree", {
        description = "Jungle Tree",
        tiles ={"default_jungletree_top.png", "default_jungletree_top.png", "default_jungletree.png"},
-       is_ground_content = true,
        groups = {snappy=2,choppy=2,oddly_breakable_by_hand=1},
        sounds = default.node_sound_wood_defaults(),
 })
@@ -849,6 +836,7 @@ minetest.register_node("default:leaves", {
        visual_scale = 1.3,
        tiles ={"default_leaves.png"},
        paramtype = "light",
+       is_ground_content = false,
        groups = {snappy=3},
        drop = {
                max_items = 1,
@@ -871,7 +859,6 @@ minetest.register_node("default:leaves", {
 minetest.register_node("default:cactus", {
        description = "Cactus",
        tiles ={"default_cactus_top.png", "default_cactus_top.png", "default_cactus_side.png"},
-       is_ground_content = true,
        groups = {snappy=2,choppy=3},
        sounds = default.node_sound_wood_defaults(),
 })
@@ -883,7 +870,6 @@ minetest.register_node("default:papyrus", {
        inventory_image = "default_papyrus.png",
        wield_image = "default_papyrus.png",
        paramtype = "light",
-       is_ground_content = true,
        walkable = false,
        groups = {snappy=3},
        sounds = default.node_sound_leaves_defaults(),
@@ -892,7 +878,6 @@ minetest.register_node("default:papyrus", {
 minetest.register_node("default:bookshelf", {
        description = "Bookshelf",
        tiles ={"default_wood.png", "default_wood.png", "default_bookshelf.png"},
-       is_ground_content = true,
        groups = {snappy=2,choppy=3,oddly_breakable_by_hand=2},
        sounds = default.node_sound_wood_defaults(),
 })
@@ -904,7 +889,6 @@ minetest.register_node("default:glass", {
        inventory_image = minetest.inventorycube("default_glass.png"),
        paramtype = "light",
        sunlight_propagates = true,
-       is_ground_content = true,
        groups = {snappy=2,cracky=3,oddly_breakable_by_hand=3},
        sounds = default.node_sound_glass_defaults(),
 })
@@ -916,7 +900,6 @@ minetest.register_node("default:fence_wood", {
        inventory_image = "default_fence.png",
        wield_image = "default_fence.png",
        paramtype = "light",
-       is_ground_content = true,
        selection_box = {
                type = "fixed",
                fixed = {-1/7, -1/2, -1/7, 1/7, 1/2, 1/7},
@@ -932,7 +915,6 @@ minetest.register_node("default:rail", {
        inventory_image = "default_rail.png",
        wield_image = "default_rail.png",
        paramtype = "light",
-       is_ground_content = true,
        walkable = false,
        selection_box = {
                type = "fixed",
@@ -949,7 +931,6 @@ minetest.register_node("default:ladder", {
        wield_image = "default_ladder.png",
        paramtype = "light",
        paramtype2 = "wallmounted",
-       is_ground_content = true,
        walkable = false,
        climbable = true,
        selection_box = {
@@ -966,7 +947,6 @@ minetest.register_node("default:ladder", {
 minetest.register_node("default:wood", {
        description = "Wood",
        tiles ={"default_wood.png"},
-       is_ground_content = true,
        groups = {snappy=2,choppy=2,oddly_breakable_by_hand=2},
        sounds = default.node_sound_wood_defaults(),
 })
@@ -974,7 +954,6 @@ minetest.register_node("default:wood", {
 minetest.register_node("default:mese", {
        description = "Mese",
        tiles ={"default_mese.png"},
-       is_ground_content = true,
        groups = {cracky=1,level=2},
        sounds = default.node_sound_defaults(),
 })
@@ -982,7 +961,6 @@ minetest.register_node("default:mese", {
 minetest.register_node("default:cloud", {
        description = "Cloud",
        tiles ={"default_cloud.png"},
-       is_ground_content = true,
        sounds = default.node_sound_defaults(),
 })
 
@@ -1001,6 +979,7 @@ minetest.register_node("default:water_flowing", {
        pointable = false,
        diggable = false,
        buildable_to = true,
+       drowning = 1,
        liquidtype = "flowing",
        liquid_alternative_flowing = "default:water_flowing",
        liquid_alternative_source = "default:water_source",
@@ -1024,6 +1003,7 @@ minetest.register_node("default:water_source", {
        pointable = false,
        diggable = false,
        buildable_to = true,
+       drowning = 1,
        liquidtype = "source",
        liquid_alternative_flowing = "default:water_flowing",
        liquid_alternative_source = "default:water_source",
@@ -1055,6 +1035,7 @@ minetest.register_node("default:lava_flowing", {
        pointable = false,
        diggable = false,
        buildable_to = true,
+       drowning = 1,
        liquidtype = "flowing",
        liquid_alternative_flowing = "default:lava_flowing",
        liquid_alternative_source = "default:lava_source",
@@ -1082,6 +1063,7 @@ minetest.register_node("default:lava_source", {
        pointable = false,
        diggable = false,
        buildable_to = true,
+       drowning = 1,
        liquidtype = "source",
        liquid_alternative_flowing = "default:lava_flowing",
        liquid_alternative_source = "default:lava_source",
@@ -1100,6 +1082,7 @@ minetest.register_node("default:torch", {
        paramtype = "light",
        paramtype2 = "wallmounted",
        sunlight_propagates = true,
+       is_ground_content = false,
        walkable = false,
        light_source = LIGHT_MAX-1,
        selection_box = {
@@ -1122,6 +1105,7 @@ minetest.register_node("default:sign_wall", {
        paramtype = "light",
        paramtype2 = "wallmounted",
        sunlight_propagates = true,
+       is_ground_content = false,
        walkable = false,
        selection_box = {
                type = "wallmounted",
@@ -1133,14 +1117,14 @@ minetest.register_node("default:sign_wall", {
        legacy_wallmounted = true,
        sounds = default.node_sound_defaults(),
        on_construct = function(pos)
-               --local n = minetest.env:get_node(pos)
-               local meta = minetest.env:get_meta(pos)
+               --local n = minetest.get_node(pos)
+               local meta = minetest.get_meta(pos)
                meta:set_string("formspec", "field[text;;${text}]")
                meta:set_string("infotext", "\"\"")
        end,
        on_receive_fields = function(pos, formname, fields, sender)
                --print("Sign at "..minetest.pos_to_string(pos).." got "..dump(fields))
-               local meta = minetest.env:get_meta(pos)
+               local meta = minetest.get_meta(pos)
                fields.text = fields.text or ""
                print((sender:get_player_name() or "").." wrote \""..fields.text..
                                "\" to sign at "..minetest.pos_to_string(pos))
@@ -1156,9 +1140,10 @@ minetest.register_node("default:chest", {
        paramtype2 = "facedir",
        groups = {snappy=2,choppy=2,oddly_breakable_by_hand=2},
        legacy_facedir_simple = true,
+       is_ground_content = false,
        sounds = default.node_sound_wood_defaults(),
        on_construct = function(pos)
-               local meta = minetest.env:get_meta(pos)
+               local meta = minetest.get_meta(pos)
                meta:set_string("formspec",
                                "size[8,9]"..
                                "list[current_name;main;0,0;8,4;]"..
@@ -1168,7 +1153,7 @@ minetest.register_node("default:chest", {
                inv:set_size("main", 8*4)
        end,
        can_dig = function(pos,player)
-               local meta = minetest.env:get_meta(pos);
+               local meta = minetest.get_meta(pos);
                local inv = meta:get_inventory()
                return inv:is_empty("main")
        end,
@@ -1188,15 +1173,16 @@ minetest.register_node("default:chest_locked", {
        paramtype2 = "facedir",
        groups = {snappy=2,choppy=2,oddly_breakable_by_hand=2},
        legacy_facedir_simple = true,
+       is_ground_content = false,
        sounds = default.node_sound_wood_defaults(),
        after_place_node = function(pos, placer)
-               local meta = minetest.env:get_meta(pos)
+               local meta = minetest.get_meta(pos)
                meta:set_string("owner", placer:get_player_name() or "")
                meta:set_string("infotext", "Locked Chest (owned by "..
                                meta:get_string("owner")..")")
        end,
        on_construct = function(pos)
-               local meta = minetest.env:get_meta(pos)
+               local meta = minetest.get_meta(pos)
                meta:set_string("formspec",
                                "size[8,9]"..
                                "list[current_name;main;0,0;8,4;]"..
@@ -1207,12 +1193,12 @@ minetest.register_node("default:chest_locked", {
                inv:set_size("main", 8*4)
        end,
        can_dig = function(pos,player)
-               local meta = minetest.env:get_meta(pos);
+               local meta = minetest.get_meta(pos);
                local inv = meta:get_inventory()
                return inv:is_empty("main")
        end,
        allow_metadata_inventory_move = function(pos, from_list, from_index, to_list, to_index, count, player)
-               local meta = minetest.env:get_meta(pos)
+               local meta = minetest.get_meta(pos)
                if not has_locked_chest_privilege(meta, player) then
                        minetest.log("action", player:get_player_name()..
                                        " tried to access a locked chest belonging to "..
@@ -1223,7 +1209,7 @@ minetest.register_node("default:chest_locked", {
                return count
        end,
     allow_metadata_inventory_put = function(pos, listname, index, stack, player)
-               local meta = minetest.env:get_meta(pos)
+               local meta = minetest.get_meta(pos)
                if not has_locked_chest_privilege(meta, player) then
                        minetest.log("action", player:get_player_name()..
                                        " tried to access a locked chest belonging to "..
@@ -1234,7 +1220,7 @@ minetest.register_node("default:chest_locked", {
                return stack:get_count()
        end,
     allow_metadata_inventory_take = function(pos, listname, index, stack, player)
-               local meta = minetest.env:get_meta(pos)
+               local meta = minetest.get_meta(pos)
                if not has_locked_chest_privilege(meta, player) then
                        minetest.log("action", player:get_player_name()..
                                        " tried to access a locked chest belonging to "..
@@ -1273,9 +1259,10 @@ minetest.register_node("default:furnace", {
        paramtype2 = "facedir",
        groups = {cracky=2},
        legacy_facedir_simple = true,
+       is_ground_content = false,
        sounds = default.node_sound_stone_defaults(),
        on_construct = function(pos)
-               local meta = minetest.env:get_meta(pos)
+               local meta = minetest.get_meta(pos)
                meta:set_string("formspec", default.furnace_inactive_formspec)
                meta:set_string("infotext", "Furnace")
                local inv = meta:get_inventory()
@@ -1284,7 +1271,7 @@ minetest.register_node("default:furnace", {
                inv:set_size("dst", 4)
        end,
        can_dig = function(pos,player)
-               local meta = minetest.env:get_meta(pos);
+               local meta = minetest.get_meta(pos);
                local inv = meta:get_inventory()
                if not inv:is_empty("fuel") then
                        return false
@@ -1306,9 +1293,10 @@ minetest.register_node("default:furnace_active", {
        drop = "default:furnace",
        groups = {cracky=2},
        legacy_facedir_simple = true,
+       is_ground_content = false,
        sounds = default.node_sound_stone_defaults(),
        on_construct = function(pos)
-               local meta = minetest.env:get_meta(pos)
+               local meta = minetest.get_meta(pos)
                meta:set_string("formspec", default.furnace_inactive_formspec)
                meta:set_string("infotext", "Furnace");
                local inv = meta:get_inventory()
@@ -1317,7 +1305,7 @@ minetest.register_node("default:furnace_active", {
                inv:set_size("dst", 4)
        end,
        can_dig = function(pos,player)
-               local meta = minetest.env:get_meta(pos);
+               local meta = minetest.get_meta(pos);
                local inv = meta:get_inventory()
                if not inv:is_empty("fuel") then
                        return false
@@ -1330,18 +1318,13 @@ minetest.register_node("default:furnace_active", {
        end,
 })
 
-function hacky_swap_node(pos,name)
-       local node = minetest.env:get_node(pos)
-       local meta = minetest.env:get_meta(pos)
-       local meta0 = meta:to_table()
+function swap_node(pos,name)
+       local node = minetest.get_node(pos)
        if node.name == name then
                return
        end
        node.name = name
-       local meta0 = meta:to_table()
-       minetest.env:set_node(pos,node)
-       meta = minetest.env:get_meta(pos)
-       meta:from_table(meta0)
+       minetest.swap_node(pos, node)
 end
 
 minetest.register_abm({
@@ -1349,7 +1332,7 @@ minetest.register_abm({
        interval = 1.0,
        chance = 1,
        action = function(pos, node, active_object_count, active_object_count_wider)
-               local meta = minetest.env:get_meta(pos)
+               local meta = minetest.get_meta(pos)
                for i, name in ipairs({
                                "fuel_totaltime",
                                "fuel_time",
@@ -1396,7 +1379,7 @@ minetest.register_abm({
                        local percent = math.floor(meta:get_float("fuel_time") /
                                        meta:get_float("fuel_totaltime") * 100)
                        meta:set_string("infotext","Furnace active: "..percent.."%")
-                       hacky_swap_node(pos,"default:furnace_active")
+                       swap_node(pos,"default:furnace_active")
                        meta:set_string("formspec",
                                "size[8,9]"..
                                "image[2,2;1,1;default_furnace_fire_bg.png^[lowpart:"..
@@ -1422,7 +1405,7 @@ minetest.register_abm({
 
                if fuel.time <= 0 then
                        meta:set_string("infotext","Furnace out of fuel")
-                       hacky_swap_node(pos,"default:furnace")
+                       swap_node(pos,"default:furnace")
                        meta:set_string("formspec", default.furnace_inactive_formspec)
                        return
                end
@@ -1430,7 +1413,7 @@ minetest.register_abm({
                if cooked.item:is_empty() then
                        if was_active then
                                meta:set_string("infotext","Furnace is empty")
-                               hacky_swap_node(pos,"default:furnace")
+                               swap_node(pos,"default:furnace")
                                meta:set_string("formspec", default.furnace_inactive_formspec)
                        end
                        return
@@ -1448,7 +1431,6 @@ minetest.register_abm({
 minetest.register_node("default:cobble", {
        description = "Cobble",
        tiles ={"default_cobble.png"},
-       is_ground_content = true,
        groups = {cracky=3},
        sounds = default.node_sound_stone_defaults(),
 })
@@ -1456,7 +1438,6 @@ minetest.register_node("default:cobble", {
 minetest.register_node("default:mossycobble", {
        description = "Mossy Cobble",
        tiles ={"default_mossycobble.png"},
-       is_ground_content = true,
        groups = {cracky=3},
        sounds = default.node_sound_stone_defaults(),
 })
@@ -1464,7 +1445,6 @@ minetest.register_node("default:mossycobble", {
 minetest.register_node("default:steelblock", {
        description = "Steel Block",
        tiles ={"default_steel_block.png"},
-       is_ground_content = true,
        groups = {snappy=1,bendy=2},
        sounds = default.node_sound_stone_defaults(),
 })
@@ -1477,6 +1457,7 @@ minetest.register_node("default:nyancat", {
        paramtype2 = "facedir",
        groups = {cracky=2},
        legacy_facedir_simple = true,
+       is_ground_content = false,
        sounds = default.node_sound_defaults(),
 })
 
@@ -1484,6 +1465,7 @@ minetest.register_node("default:nyancat_rainbow", {
        description = "Nyancat Rainbow",
        tiles ={"default_nc_rb.png"},
        inventory_image = "default_nc_rb.png",
+       is_ground_content = false,
        groups = {cracky=2},
        sounds = default.node_sound_defaults(),
 })
@@ -1515,6 +1497,133 @@ minetest.register_node("default:apple", {
        sounds = default.node_sound_defaults(),
 })
 
+
+local c_air = minetest.get_content_id("air")
+local c_ignore = minetest.get_content_id("ignore")
+local c_tree = minetest.get_content_id("default:tree")
+local c_leaves = minetest.get_content_id("default:leaves")
+local c_apple = minetest.get_content_id("default:apple")
+function default.grow_tree(data, a, pos, is_apple_tree, seed)
+       --[[
+               NOTE: Tree-placing code is currently duplicated in the engine
+               and in games that have saplings; both are deprecated but not
+               replaced yet
+       ]]--
+       local pr = PseudoRandom(seed)
+       local th = pr:next(4, 5)
+       local x, y, z = pos.x, pos.y, pos.z
+       for yy = y, y+th-1 do
+               local vi = a:index(x, yy, z)
+               if a:contains(x, yy, z) and (data[vi] == c_air or yy == y) then
+                       data[vi] = c_tree
+               end
+       end
+       y = y+th-1 -- (x, y, z) is now last piece of trunk
+       local leaves_a = VoxelArea:new{MinEdge={x=-2, y=-1, z=-2}, MaxEdge={x=2, y=2, z=2}}
+       local leaves_buffer = {}
+       
+       -- Force leaves near the trunk
+       local d = 1
+       for xi = -d, d do
+       for yi = -d, d do
+       for zi = -d, d do
+               leaves_buffer[leaves_a:index(xi, yi, zi)] = true
+       end
+       end
+       end
+       
+       -- Add leaves randomly
+       for iii = 1, 8 do
+               local d = 1
+               local xx = pr:next(leaves_a.MinEdge.x, leaves_a.MaxEdge.x - d)
+               local yy = pr:next(leaves_a.MinEdge.y, leaves_a.MaxEdge.y - d)
+               local zz = pr:next(leaves_a.MinEdge.z, leaves_a.MaxEdge.z - d)
+               
+               for xi = 0, d do
+               for yi = 0, d do
+               for zi = 0, d do
+                       leaves_buffer[leaves_a:index(xx+xi, yy+yi, zz+zi)] = true
+               end
+               end
+               end
+       end
+       
+       -- Add the leaves
+       for xi = leaves_a.MinEdge.x, leaves_a.MaxEdge.x do
+       for yi = leaves_a.MinEdge.y, leaves_a.MaxEdge.y do
+       for zi = leaves_a.MinEdge.z, leaves_a.MaxEdge.z do
+               if a:contains(x+xi, y+yi, z+zi) then
+                       local vi = a:index(x+xi, y+yi, z+zi)
+                       if data[vi] == c_air or data[vi] == c_ignore then
+                               if leaves_buffer[leaves_a:index(xi, yi, zi)] then
+                                       if is_apple_tree and pr:next(1, 100) <=  10 then
+                                               data[vi] = c_apple
+                                       else
+                                               data[vi] = c_leaves
+                                       end
+                               end
+                       end
+               end
+       end
+       end
+       end
+end
+
+minetest.register_abm({
+       nodenames = {"default:sapling"},
+       interval = 10,
+       chance = 50,
+       action = function(pos, node)
+               local is_soil = minetest.registered_nodes[minetest.get_node({x=pos.x, y=pos.y-1, z=pos.z}).name].groups.soil
+               if is_soil == nil or is_soil == 0 then return end
+               print("A sapling grows into a tree at "..minetest.pos_to_string(pos))
+               local vm = minetest.get_voxel_manip()
+               local minp, maxp = vm:read_from_map({x=pos.x-16, y=pos.y, z=pos.z-16}, {x=pos.x+16, y=pos.y+16, z=pos.z+16})
+               local a = VoxelArea:new{MinEdge=minp, MaxEdge=maxp}
+               local data = vm:get_data()
+               default.grow_tree(data, a, pos, math.random(1, 4) == 1, math.random(1,100000))
+               vm:set_data(data)
+               vm:write_to_map(data)
+               vm:update_map()
+       end
+})
+
+minetest.register_abm({
+       nodenames = {"default:dirt"},
+       interval = 2,
+       chance = 200,
+       action = function(pos, node)
+               local above = {x=pos.x, y=pos.y+1, z=pos.z}
+               local name = minetest.get_node(above).name
+               local nodedef = minetest.registered_nodes[name]
+               if nodedef and (nodedef.sunlight_propagates or nodedef.paramtype == "light")
+                               and nodedef.liquidtype == "none"
+                               and (minetest.get_node_light(above) or 0) >= 13 then
+                       if name == "default:snow" or name == "default:snowblock" then
+                               minetest.set_node(pos, {name = "default:dirt_with_snow"})
+                       else
+                               minetest.set_node(pos, {name = "default:dirt_with_grass"})
+                       end
+               end
+       end
+})
+
+minetest.register_abm({
+       nodenames = {"default:dirt_with_grass"},
+       interval = 2,
+       chance = 20,
+       action = function(pos, node)
+               local above = {x=pos.x, y=pos.y+1, z=pos.z}
+               local name = minetest.get_node(above).name
+               local nodedef = minetest.registered_nodes[name]
+               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"})
+               end
+       end
+})
+
 --
 -- Crafting items
 --