Merge branch 'github'

* stairs is now added to depends.txt
* The mapgen perlin noise functions use a buffer now

.gitignore

@@ -0,0 +1,3 @@
+config.txt
+debug.txt
+*~

.luacheckrc

@@ -0,0 +1,16 @@
+read_globals = {
+	"dump", "vector", "minetest",
+	"table", "math", "PseudoRandom", "VoxelArea",
+	"stairs", "stairsplus", "skins", "treecapitator",
+	default = {
+		fields = {
+			player_attached = {
+				read_only = false,
+				other_fields = true
+			}
+		},
+		other_fields = true
+	}
+}
+globals = {"snow"}
+-- ignore = {"421", "423"}

LazyJ-changelog.txt

@@ -0,0 +1,162 @@
+~ LazyJ, 2014_06_01
+
+~~~~~~~~~~~~~~~~~~~~
+List of Changes
+~~~~~~~~~~~~~~~~~~~~
+
+
+
+##### MapGen
+
+I did *not* fix Snow's mapgen issue with "PlantLife" (another great, Minetest
+standard) based mods. Mapgen stuff is far beyond my current skill level.
+What little changes I did make were to switch-out Snow nodes that Minetest
+now has as defaults (dirt_with_snow, snow, ice). My thoughts being that
+texture packs and other mods that may use these nodes as recipe items are more
+likely to support default nodes. I also added a line above and below in the
+"mapgen.lua" file indicating where to put the comment symbols to
+comment-out/disable Snow's mapgen. Mods based on VanessaE's excellent
+"PlantLife" mod will not produce if Snow's mapgen is active.
+*Snow's mapgen is active by default.*
+I did not disable it, merely indicated were the comment symbols are
+to be placed. To compensate for the loss of snow resources when Snow's mapgen
+is disabled, I created crafting recipes that allows players to craft more
+snow, ice, and moss. This not only encourages snow builds, but also allows
+the players to create snow biomes where they want and whatever size they are
+willing to make them.
+
+
+##### Fixed
+	* Pine saplings are now replaced with tree trunks when the tree grows.
+	* Snowballs no longer pass through solid objects. Griefers can no
+	longer flood the interiors of builds by throwing snowballs through the
+	walls hoping to either leave a snowy mess inside or that a heat source
+	would melt the snow and flood the interior.
+	* Snowballs no longer destroy nodes when thrown at the sides.
+	* Falling snow no longer destroys nodes (same problem snowballs had).
+	* Snow bricks now, instead of disappearing like before, melt
+	into water sources.
+	* Christmas tree saplings once again will drop when pine needles
+	are harvested.
+	* Dirt_with_snow changes to dirt when a solid, non-light permeating
+	(sunlight_propagates) block is set on top of it.
+
+
+
+##### Changed
+	* All snow and ice stuff (including the stairs, slabs, panels, and
+	microblocks) will freeze dirt and dirt_with_grass into dirt_with_snow.
+	* All snow and most ice stuff will freeze water into ice, including
+	the stairs, slabs, panels, and microblocks. The exception is the
+	full-sized ice blocks will *not* freeze water into ice.
+	* Snow brick texture reworked and based off of the default stone brick
+	texture (and less purple in the grout).
+	* Ice stuff is now semi-transparent.
+	* Christmas trees now have blinking lights that give off a
+	low level of light.
+	* Christmas tree stars now give off a high level of light and the
+	light can be punched on or off.
+	* Combined default snow and snowballs. Now snow can be
+	thrown (left-click) or placed (right-click). 
+	* Snow stuff now has "snow" sounds instead of "grass" sounds.
+	* Melting - Full-sized snow blocks, snow brick, snow cobble, and ice
+	will melt into water sources. The down-side is this makes a big,
+	permanent mess. The up-side, this is a convenient way to carry water,
+	if buckets are disabled on your server, by keeping full-sized snow
+	stuff and ice blocks in your inventory to, later, melt where you
+	need water.
+	* Melting - Partial and small-sized blocks like snow (snowballs),
+	basic stairs and slabs for snow stuff and ice, and circular saw-made
+	snow stuff and ice things will melt into a water source for 2 seconds,
+	then switch from a water source to flowing water, and after a moment
+	the flowing water dries-up (small, temporary mess).
+
+
+
+##### Added
+	* New block-type: "Snow Cobble". Just like regular cobble from regular
+	stone, snow cobble comes from digging snow blocks.
+	* All snow and ice blocks can be crafted into basic slabs and stairs.
+	The default slabs stack and change back into full-sized blocks
+	("More Blocks" slabs won't do this).
+	* Soft dependency on a recent release Calinou's MoreBlocks so all
+	snow and ice blocks are compatible with the circular saw. If you don't
+	have MoreBlocks installed, Snow will ignore the code for those fancy
+	blocks and use basic stairs and slabs instead.
+	* All snow and ice stuff works with the screwdriver.
+	* Crafting, recycling, and cooking recipes for snow blocks,
+	ice, and moss.
+		* Snow bricks craft-recycle back into 4 snow blocks.
+		* 2 snow blocks craft into 3 snow blocks. This is to make up
+		for when the mapgen for snow biomes is disabled.
+		* 2 snow cobble craft-recycle into 3 snow blocks.
+		* 4 pine needles craft into 1 moss
+		* Snow blocks, snow cobble, and snow bricks can be cooked in a
+		furnace to make ice.
+	* Snowballs can be thrown (left-click) to build up layers. After the
+	11th layer, the bottom 9 layers change into a snow block. At a very
+	close distance, throwing snowballs can be used as a technique to
+	build-up gradual slopes. If you have lots and lots of snow balls,
+	with rapid-fire throwing, you can, very briefly, "white-out" another
+	player's view if your aim is good enough to hit them in the face.
+	* Snowballs can be placed (right-click) but will not stack into
+	multiple layers. Just one layer only. Placing snow is more reliable
+	and accurate than throwing snow from a distance. By placing snow,
+	players are able to create their own, personal, snow biomes.
+	* Vertical clearance check for tree growth. The nine blocks above the
+	spot where the sapling is placed must be free and clear of all
+	obstructions or else the sapling will not be allowed to grow.
+	Griefers could place the saplings in builds and when the tree grows
+	it may not destroy nodes but it fills the available air space leaving
+	a mess for the build's owner to clean-up. Now the trees will only grow
+	inside if there is 9, free-and-clear spaces from floor to ceiling.
+	Because pine trees (and Christmas trees) will grow on any solid surface,
+	their saplings are handy to take with you when deep mining. Just before
+	you run out of tool wood, dig out a space large enough for a tree to
+	grow, plant a pine or Christmas tree sapling then place 2 torches on
+	either side, right next to the sapling. After the tree grows harvest
+	the trunk for tool wood, the leaves for short-run fuel in the furnace
+	and for saplings to renew your tool wood supply again.
+	* Aliases to help make WorldEdit and "give" commands easier:
+			
+
+	"default_snow" = "default:snow"
+	"snowball" = "default:snow"
+	"snowballs" = "default:snow"
+	"snow_ball" = "default:snow"
+	"ice" = "default:ice"
+	"default_ice" = "default:ice"
+	"dirtwithsnow" = "default:dirt_with_snow"
+	"snowdirt" = "default:dirt_with_snow"
+	"snowydirt" = "default:dirt_with_snow"
+	"snowblocks" = "default:snowblock"
+	"snowbrick" = "snow:snow_brick"
+	"bricksnow" = "snow:snow_brick"
+	"snowbricks" = "snow:snow_brick"
+	"snowybricks" = "snow:snow_brick"
+	"snowcobble" = "snow:snow_cobble"
+	"snowycobble" = "snow:snow_cobble"
+	"cobblesnow" = "snow:snow_cobble"
+
+
+
+~~~~~~
+TODO
+~~~~~~
+
+Falling Snow:
+	* Add code to prevent snowfall from depositing snow on or near torches,
+active furnaces, and lava.
+
+	* Add code to prevent snowfall from depositing snow on
+'walkable = false' defined nodes.
+
+
+
+Sled:
+	* Figure out why the player avatars remain in a seated position,
+even after getting off the sled, if they flew while on the sled.
+'default.player_set_animation', where is a better explanation for this and what
+are it's available options?
+
+

changelog.txt

@@ -0,0 +1,72 @@
+CHANGELOG:
+------------
+Version 4.0
+
+	Snow mod is now a complimentary mod to the default snow found in minetest.
+	
+	HybridDog's large changes, fixes and more (see commit log).
+
+Version 3.2
+
+	Update compatibility to the latest minetest.
+	
+Version 0.3.1
+
+	Paramat's rewrite of mapgenv6.lua: bugfixes, use noisemaps for big speed increase
+
+Version 3.0
+	LazyJ's big changes (see LazyJ-changelog.txt)
+	
+	Ice freezes-over.
+	
+	Better leveled snow.
+	
+	PLUS MORE! (see commit log)
+
+Version 2.0
+
+    Uses default namespace.
+    
+    Sleds.
+    
+    Bugfixes.
+    
+Version 1.8
+
+    Mapgen_v7 support.
+    
+    Better config system.
+    
+    Falling snow.
+
+Version 1.4
+
+    New biomes, snowy and plain
+    
+    Christmas Trees
+    
+    Snowfall
+    
+Version 1.3
+
+    Smooth transitions
+    
+    Snow Bricks
+
+Version 1.2
+
+    Pine trees
+    
+    Moss
+    
+    Alpine biomes
+	
+    Dry shrubs
+
+Version 1.1
+
+    Better mapgen
+
+Version 1.0
+
+    Initial release

config.lua

@@ -1,10 +0,0 @@
---This file contains configuration options for snow mod.
-
---Enables falling snow.
-snow.enable_snowfall = true
-
---Enables debuging.
-snow.debug = false
-
---Enables smooth transition of biomes.
-snow.smooth = true

depends.txt

@@ -1 +1,7 @@
 default
+christmas_craft?
+flowers?
+stairs?
+moreblocks?
+skins?
+treecapitator?

init.lua

@@ -1,590 +1,207 @@
 --[[
+--==============================
+--==========================================================
+LazyJ's Fork of Splizard's "Snow Biomes" Mod
+by LazyJ
+version: Umpteen-hundred and 7/5ths something or another.
+2014_04_12
+
+~~~
+
+"Snow Biomes" Mod
+By Splizard
+
+Download:
+http//forum.minetest.net/viewtopic.php?id=2290
+http://github.com/Splizard/minetest-mod-snow/
+
+--==========================================================
+--==============================
+
    Snow Biomes
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.
-   
+
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
-   
+
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
    MA 02110-1301, USA.
 ]]--
 
-snow = {}
-dofile(minetest.get_modpath("snow").."/mapgen.lua")
-dofile(minetest.get_modpath("snow").."/config.lua")
 
---Replace leaves so snow gets removed on decay.
-local leaves = {}
-for k,v in pairs(minetest.registered_nodes["default:leaves"]) do
-	leaves[k] = v
-end
-leaves.after_destruct = function(pos, node, digger)
-	pos.y = pos.y + 1
-	local nodename = minetest.env:get_node(pos).name
-	if nodename == "snow:snow" then
-		minetest.env:remove_node(pos)
+
+-- Original Lua Files
+--dofile(modpath.."/util.lua")
+--dofile(modpath.."/mapgen.lua")
+--dofile(modpath.."/sled.lua")
+-- "falling_snow.lua" disabled since weather functions minetest.get_heat(pos) and minetest.get_humidity(pos)
+-- have been removed from Minetest.
+--  Until something else can be figured out, use paramat's "Snowdrift" mod instead.
+-- dofile(modpath.."/falling_snow.lua")
+
+local load_time_start = minetest.get_us_time()
+
+
+-- Original init.lua File Broken into Smaller Files
+local srcpath = minetest.get_modpath("snow").."/src/"
+dofile(srcpath.."abms.lua")
+dofile(srcpath.."aliases.lua")
+dofile(srcpath.."crafting.lua")
+
+
+-- The formspec menu didn't work when util.lua was the very first "dofile" so I moved
+-- it and all the other original "dofiles", in order, to the bottom of the list. ~ LazyJ
+-- Minetest would crash if the mapgen was called upon before the rest of other snow lua files so
+-- I put it lower on the list and that seems to do the trick. ~ LazyJ
+dofile(srcpath.."util.lua")
+dofile(srcpath.."snowball.lua")
+-- To get Xmas tree saplings, the "christmas_content", true or false, in "util.lua" has to be determined first.
+-- That means "nodes.lua", where the saplings are controlled, has to come after "util.lua". ~ LazyJ
+dofile(srcpath.."nodes.lua")
+dofile(srcpath.."stairs.lua")
+dofile(srcpath.."mapgen.lua")
+dofile(srcpath.."sled.lua")
+dofile(srcpath.."falling_snow.lua")
+
+
+local is_uneven
+--This function places snow checking at the same time for snow level and increasing as needed.
+--This also takes into account sourrounding snow and makes snow even.
+function snow.place(pos, disablesound)
+	local node = minetest.get_node_or_nil(pos)
+
+	--Oops, maybe there is no node?
+	if not node
+	or not minetest.registered_nodes[node.name] then
+		return
 	end
-end
-minetest.register_node(":default:leaves", leaves)
 
---Pine leaves.
-minetest.register_node("snow:needles", {
-	description = "Pine Needles",
-	drawtype = "allfaces_optional",
-	visual_scale = 1.3,
-	tiles = {"snow_needles.png"},
-	paramtype = "light",
-	groups = {snappy=3, leafdecay=3, flammable=2},
-	drop = {
-		max_items = 1,
-		items = {
-			{
-				-- player will get xmas tree with 1/50 chance
-				items = {'snow:xmas_tree'},
-				rarity = 50,
-			},
-			{
-				-- player will get sapling with 1/20 chance
-				items = {'snow:sapling_pine'},
-				rarity = 20,
-			},
-			{
-				-- player will get leaves only if he get no saplings,
-				-- this is because max_items is 1
-				items = {'snow:needles'},
-			}
-		}
-	},
-	--Remove snow above leaves after decay.
-	after_destruct = function(pos, node, digger)
-		pos.y = pos.y + 1
-		local nodename = minetest.env:get_node(pos).name
-		if nodename == "snow:snow" then
-			minetest.env:remove_node(pos)
-		end
-	end,
-	sounds = default.node_sound_leaves_defaults(),
-})
-
---Decorated Pine leaves.
-minetest.register_node("snow:needles_decorated", {
-	description = "Decorated Pine Needles",
-	drawtype = "allfaces_optional",
-	tiles = {"snow_needles_decorated.png"},
-	paramtype = "light",
-	groups = {snappy=3, leafdecay=3, flammable=2},
-		drop = {
-		max_items = 1,
-		items = {
-			{
-				-- player will get xmas tree with 1/20 chance
-				items = {'snow:xmas_tree'},
-				rarity = 50,
-			},
-			{
-				-- player will get sapling with 1/20 chance
-				items = {'snow:sapling_pine'},
-				rarity = 20,
-			},
-			{
-				-- player will get leaves only if he get no saplings,
-				-- this is because max_items is 1
-				items = {'snow:needles_decorated'},
-			}
-		}
-	},
-	--Remove snow above leaves after decay.
-	after_destruct = function(pos, node, digger)
-		pos.y = pos.y + 1
-		local nodename = minetest.env:get_node(pos).name
-		if nodename == "snow:snow" then
-			minetest.env:remove_node(pos)
-		end
-	end,
-	sounds = default.node_sound_leaves_defaults(),
-})
-
-minetest.register_node("snow:xmas_tree", {
-	description = "Christmas Tree",
-	drawtype = "plantlike",
-	visual_scale = 1.0,
-	tiles = {"snow_xmas_tree.png"},
-	inventory_image = "snow_xmas_tree.png",
-	wield_image = "snow_xmas_tree.png",
-	paramtype = "light",
-	walkable = false,
-	groups = {snappy=2,dig_immediate=3,flammable=2},
-	sounds = default.node_sound_defaults(),
-})
-
-minetest.register_node("snow:sapling_pine", {
-	description = "Pine Sapling",
-	drawtype = "plantlike",
-	visual_scale = 1.0,
-	tiles = {"snow_sapling_pine.png"},
-	inventory_image = "snow_sapling_pine.png",
-	wield_image = "snow_sapling_pine.png",
-	paramtype = "light",
-	walkable = false,
-	groups = {snappy=2,dig_immediate=3,flammable=2},
-	sounds = default.node_sound_defaults(),
-})
-
-minetest.register_node("snow:star", {
-	description = "Star",
-	drawtype = "torchlike",
-	tiles = {"snow_star.png"},
-	inventory_image = "snow_star.png",
-	wield_image = "snow_star.png",
-	paramtype = "light",
-	walkable = false,
-	groups = {snappy=2,dig_immediate=3},
-	sounds = default.node_sound_defaults(),
-})
-
-minetest.register_craft({
-	type = "fuel",
-	recipe = "snow:needles",
-	burntime = 1,
-})
-
-minetest.register_craft({
-	type = "fuel",
-	recipe = "snow:sapling_pine",
-	burntime = 10,
-})
-
-minetest.register_craft({
-	type = "fuel",
-	recipe = "snow:needles_decorated",
-	burntime = 1,
-})
-
-minetest.register_craft({
-	type = "fuel",
-	recipe = "snow:xmas_tree",
-	burntime = 10,
-})
-
-
-
---Snowballs
--------------
-snowball_GRAVITY=9
-snowball_VELOCITY=19
-
---Shoot snowball.
-local snow_shoot_snowball=function (item, player, pointed_thing)
-	local playerpos=player:getpos()
-	local obj=minetest.env:add_entity({x=playerpos.x,y=playerpos.y+1.5,z=playerpos.z}, "snow:snowball_entity")
-	local dir=player:get_look_dir()
-	obj:setvelocity({x=dir.x*snowball_VELOCITY, y=dir.y*snowball_VELOCITY, z=dir.z*snowball_VELOCITY})
-	obj:setacceleration({x=dir.x*-3, y=-snowball_GRAVITY, z=dir.z*-3})
-	item:take_item()
-	return item
-end
-
---The snowball Entity
-snow_snowball_ENTITY={
-	physical = false,
-	timer=0,
-	textures = {"snow_snowball.png"},
-	lastpos={},
-	collisionbox = {0,0,0,0,0,0},
-}
-
---Snowball_entity.on_step()--> called when snowball is moving.
-snow_snowball_ENTITY.on_step = function(self, dtime)
-	self.timer=self.timer+dtime
-	local pos = self.object:getpos()
-	local node = minetest.env:get_node(pos)
-
-	--Become item when hitting a node.
-	if self.lastpos.x~=nil then --If there is no lastpos for some reason.
-		if node.name ~= "air" then
-			minetest.env:place_node(self.lastpos,{name="snow:snow"})
-			self.object:remove()
-		end
-	end
-	self.lastpos={x=pos.x, y=pos.y, z=pos.z} -- Set lastpos-->Node will be added at last pos outside the node
-end
-
-minetest.register_entity("snow:snowball_entity", snow_snowball_ENTITY)
-
---Snowball.
-minetest.register_craftitem("snow:snowball", {
-	description = "Snowball",
-	inventory_image = "snow_snowball.png",
-	on_use = snow_shoot_snowball,
-})
-
---Snow.
-minetest.register_node("snow:snow", {
-	description = "Snow",
-	tiles = {"snow_snow.png"},
-	drawtype = "nodebox",
-	sunlight_propagates = true,
-	paramtype = "light",
-	param2 = nil,
-	--param2 is reserved for what vegetation is hiding inside.
-	--mapgen defines the vegetation.
-	--1 = Moss
-	groups = {crumbly=3,melts=3},
-	buildable_to = true,
-	drop = 'snow:snowball',
-	node_box = {
-		type = "fixed",
-		fixed = {
-			{-0.5, -0.5, -0.5, 0.5, -0.35, 0.5}
-		},
-	},
-	selection_box = {
-		type = "fixed",
-		fixed = {
-			{-0.5, -0.5, -0.5, 0.5, -0.35, 0.5}
-		},
-	},
-	sounds = default.node_sound_dirt_defaults({
-		footstep = {name="default_gravel_footstep", gain=0.45},
-	}),
-	--Update dirt node underneath snow.
-	after_destruct = function(pos, node, digger)
-		if node.param2 == 1 then
-			local n = minetest.env:get_node(pos).name
-			if  n == "air" or n == "default:water_flowing" or n == "default:water_source" then
-				minetest.env:add_node(pos,{name="snow:moss",param2=1})
+	if node.name == "default:snow" then
+		local level = minetest.get_node_level(pos)
+		if level < 63 then
+			if minetest.get_item_group(minetest.get_node({x=pos.x, y=pos.y-1, z=pos.z}).name, "leafdecay") == 0
+			and not is_uneven(pos) then
+				if not disablesound then
+				minetest.sound_play("default_snow_footstep", {pos=pos})
+				end
+				minetest.add_node_level(pos, 7)
+			end
+		elseif level == 63 then
+			local p = minetest.find_node_near(pos, 10, "default:dirt_with_grass")
+			if p
+			and minetest.get_node_light(p, 0.5) == 15 then
+				if not disablesound then
+				minetest.sound_play("default_grass_footstep", {pos=pos})
+				end
+				minetest.place_node({x=pos.x, y=pos.y+1, z=pos.z}, {name="default:snow"})
+			else
+				if not disablesound then
+				minetest.sound_play("default_snow_footstep", {pos=pos})
+				end
+				minetest.add_node(pos, {name="default:snowblock"})
 			end
 		end
-		pos.y = pos.y - 1
-		local nodename = minetest.env:get_node(pos).name
-		if nodename == "snow:dirt_with_snow" then
-			minetest.env:add_node(pos,{name="default:dirt_with_grass"})
-		end
-	end,
-	on_construct = function(pos, newnode)
-		pos.y = pos.y - 1
-		local nodename = minetest.env:get_node(pos).name
-		if nodename == "default:dirt_with_grass" then
-			minetest.env:remove_node(pos)
-			minetest.env:add_node(pos,{name="snow:dirt_with_snow"})
-		elseif nodename == "air" then
-			pos.y = pos.y + 1
-			minetest.env:remove_node(pos)
-		end
-	end,
-})
-
---Snow with dirt.
-minetest.register_node("snow:dirt_with_snow", {
-	description = "Dirt with Snow",
-	tiles = {"snow_snow.png", "default_dirt.png", "default_dirt.png^snow_snow_side.png"},
-	is_ground_content = true,
-	groups = {crumbly=3},
-	drop = 'default:dirt',
-	sounds = default.node_sound_dirt_defaults({
-		footstep = {name="default_grass_footstep", gain=0.4},
-	}),
-	--Place snow above this node when placed.
-	after_place_node = function(pos, newnode)
-		pos.y = pos.y + 1
-		local nodename = minetest.env:get_node(pos).name
-		if nodename == "air" then
-			minetest.env:add_node(pos,{name="snow:snow"})
-		end
-	end,
-})
-
---Gets rid of snow when the node underneath is dug.
-local unsnowify = function(pos, node, digger)
-	if node.name == "default:dry_shrub" then
-		pos.y = pos.y - 1
-		local nodename = minetest.env:get_node(pos).name
-		if nodename == "snow:dirt_with_snow" then
-			minetest.env:add_node(pos,{name="default:dirt_with_grass"})
-		end
-		pos.y = pos.y + 1
-	end
-	pos.y = pos.y + 1
-	local nodename = minetest.env:get_node(pos).name
-	if nodename == "snow:snow" then
-		minetest.env:remove_node(pos)
-		local obj=minetest.env:add_entity({x=pos.x,y=pos.y,z=pos.z}, "snow:snowball_entity")
-		obj:setacceleration({x=0, y=-snowball_GRAVITY, z=0})
-	end
-end
-
-minetest.register_on_dignode(unsnowify)
-
---Snow block.
-minetest.register_node("snow:snow_block", {
-	description = "Snow",
-	tiles = {"snow_snow.png"},
-	--param2 is reserved for what vegetation is hiding inside.
-	--mapgen defines the vegetation.
-	--1 = Moss
-	--2 = Papyrus
-	--3 = Dry shrub
-	is_ground_content = true,
-	groups = {crumbly=3,melts=2,falling_node=1},
-	drop = 'snow:snow_block',
-	sounds = default.node_sound_dirt_defaults({
-		footstep = {name="default_grass_footstep", gain=0.4},
-	}),
-	--Update dirt node underneath snow.
-	after_destruct = function(pos, node, digger)
-		if node.param2 == 1 then
-			local n = minetest.env:get_node(pos).name
-			if  n == "air" or n == "default:water_flowing" or n == "default:water_source" then
-				minetest.env:add_node(pos,{name="snow:moss",param2=1})
-			end
-		elseif node.param2 == 2 then
-			local n = minetest.env:get_node(pos).name
-			if  n == "air" or n == "default:water_flowing" or n == "default:water_source" then
-				minetest.env:add_node(pos,{name="default:papyrus"})
-				pos.y = pos.y + 1 
-				local n =  minetest.env:get_node(pos)
-				if n.name == "snow:snow_block" and n.param2 == 2 then
-					minetest.env:remove_node(pos)
-					pos.y = pos.y - 1 
-					minetest.env:add_node(pos,{name="snow:snow_block",param2=2})
+	elseif node.name ~= "default:ice"
+	and minetest.get_node({x=pos.x, y=pos.y-1, z=pos.z}).name ~= "air" then
+		local data = minetest.registered_nodes[node.name]
+		local drawtype = data.drawtype
+		if drawtype == "normal"
+		or drawtype == "allfaces_optional" then
+			pos.y = pos.y+1
+			local sound = data.sounds
+			if sound and not disablesound then
+				sound = sound.footstep
+				if sound then
+					minetest.sound_play(sound.name, {pos=pos, gain=sound.gain})
 				end
 			end
-		elseif node.param2 == 3 then
-			local n = minetest.env:get_node(pos).name
-			if  n == "air" or n == "default:water_flowing" or n == "default:water_source" then
-				minetest.env:add_node(pos,{name="default:dry_shrub"})
+			minetest.place_node(pos, {name="default:snow"})
+		elseif drawtype == "plantlike" then
+			pos.y = pos.y - 1
+			if minetest.get_node(pos).name == "default:dirt_with_grass" then
+				minetest.sound_play("default_grass_footstep", {pos=pos})
+				minetest.add_node(pos, {name="default:dirt_with_snow"})
 			end
 		end
-	end,
-})
-
---Snow brick.
-minetest.register_node("snow:snow_brick", {
-	description = "Snow Brick",
-	tiles = {"snow_snow_brick.png"},
-	is_ground_content = true,
-	groups = {crumbly=3,melts=2},
-	drop = 'snow:snow_brick',
-	sounds = default.node_sound_dirt_defaults({
-		footstep = {name="default_grass_footstep", gain=0.4},
-	}),
-})
-
---Ice.
-minetest.register_node("snow:ice", {
-	description = "Ice",
-	tiles = {"snow_ice.png"},
-	is_ground_content = true,
-	groups = {snappy=2,cracky=3,melts=1},
-	drop = 'snow:ice',
-	paramtype = "light",
-	sunlight_propagates = true,
-	sounds = default.node_sound_glass_defaults({
-		footstep = {name="default_stone_footstep", gain=0.4},
-	}),
-})
-
---Moss.
-minetest.register_node("snow:moss", {
-	description = "Moss",
-	tiles = {"snow_moss.png"},
-	drawtype = "signlike",
-	paramtype = "light",
-	paramtype2 = "wallmounted",
-	walkable = false,
-	selection_box = {
-		type = "wallmounted",
-	},
-	is_ground_content = true,
-	groups = {crumbly=3, flammable=2, attached_node=1},
-})
-
-minetest.register_craft({
-    output = 'snow:snow_block',
-    recipe = {
-        {'snow:snowball', 'snow:snowball'},
-        {'snow:snowball', 'snow:snowball'},
-    },
-})
-
-minetest.register_craft({
-    output = 'snow:snow_brick',
-    recipe = {
-        {'snow:snow_block', 'snow:snow_block'},
-        {'snow:snow_block', 'snow:snow_block'},
-    },
-})
-
---Melting
---Any node part of the group melting will melt when near warm nodes such as lava, fire, torches, etc.
---The amount of water that replaces the node is defined by the number on the group:
---1: one water_source
---2: four water_flowings
---3: one water_flowing
-minetest.register_abm({
-    nodenames = {"group:melts"},
-    neighbors = {"group:igniter","default:torch","default:furnace_active","group:hot"},
-    interval = 2,
-    chance = 2,
-    action = function(pos, node, active_object_count, active_object_count_wider)
-		local intensity = minetest.get_item_group(node.name,"melts")
-		if intensity == 1 then
-			minetest.env:add_node(pos,{name="default:water_source"})
-		elseif intensity == 2 then
-			local check_place = function(pos,node)
-				if minetest.env:get_node(pos).name == "air" then
-					minetest.env:place_node(pos,node)
-				end
-			end
-			minetest.env:add_node(pos,{name="default:water_flowing"})
-			check_place({x=pos.x+1,y=pos.y,z=pos.z},{name="default:water_flowing"})
-			check_place({x=pos.x-1,y=pos.y,z=pos.z},{name="default:water_flowing"})
-			check_place({x=pos.x,y=pos.y+1,z=pos.z},{name="default:water_flowing"})
-			check_place({x=pos.x,y=pos.y-1,z=pos.z},{name="default:water_flowing"})
-		elseif intensity == 3 then
-			minetest.env:add_node(pos,{name="default:water_flowing"})
-		end
-		nodeupdate(pos)
-    end,
-})
-
---Freezing
---Water freezes when in contact with snow.
-minetest.register_abm({
-    nodenames = {"default:water_source"},
-    neighbors = {"snow:snow", "snow:snow_block"},
-    interval = 20,
-    chance = 4,
-    action = function(pos, node, active_object_count, active_object_count_wider)
-		minetest.env:add_node(pos,{name="snow:ice"})
-    end,
-})
-
---Spread moss to cobble.
-minetest.register_abm({
-    nodenames = {"default:cobble"},
-    neighbors = {"snow:moss"},
-    interval = 20,
-    chance = 6,
-    action = function(pos, node, active_object_count, active_object_count_wider)
-		minetest.env:add_node(pos,{name="default:mossycobble"})
-    end,
-})
-
---Grow saplings
-minetest.register_abm({
-    nodenames = {"snow:sapling_pine"},
-    interval = 10,
-    chance = 50,
-    action = function(pos, node, active_object_count, active_object_count_wider)
-		snow.make_pine(pos,false)
-    end,
-})
-
---Grow saplings
-minetest.register_abm({
-    nodenames = {"snow:xmas_tree"},
-    interval = 10,
-    chance = 50,
-    action = function(pos, node, active_object_count, active_object_count_wider)
-		snow.make_pine(pos,false,true)
-    end,
-})
-
-if snow.enable_snowfall then
-
-	--Snowing
-	snow_fall=function (pos)
-		local obj=minetest.env:add_entity(pos, "snow:fall_entity")
-		obj:setvelocity({x=0, y=-1, z=0})
 	end
-
-	-- The snowfall Entity
-	snow_fall_ENTITY={
-		physical = true,
-		timer=0,
-		textures = {"snow_snowfall.png"},
-		lastpos={},
-		collisionbox = {0,0,0,0,0,0},
-	}
-
-
-	-- snowfall_entity.on_step()--> called when snow is falling
-	snow_fall_ENTITY.on_step = function(self, dtime)
-		self.timer=self.timer+dtime
-		local pos = self.object:getpos()
-		local node = minetest.env:get_node(pos)
-
-		if self.lastpos and self.object:getvelocity().y == 0 then
-			if minetest.env:get_node({x=self.lastpos.x,z=self.lastpos.z,y=self.lastpos.y}).name == "snow:moss" then
-				minetest.env:add_node({x=self.lastpos.x,z=self.lastpos.z,y=self.lastpos.y},{name="snow:snow",param2=1})
-				self.object:remove()
-				return
-			end
-			minetest.env:place_node(self.lastpos,{name="snow:snow"})
-			self.object:remove()
-		end
-		
-		if self.timer > 120 then
-			self.object:remove()
-		end
-
-		self.lastpos={x=pos.x, y=pos.y, z=pos.z} -- Set lastpos-->Node will be added at last pos outside the node
-	end
-
-	minetest.register_entity("snow:fall_entity", snow_fall_ENTITY)
-
-	--Regenerate Snow
-	minetest.register_abm({
-		nodenames = {"default:dirt_with_grass", "snow:moss"},
-		interval = 50,
-		chance = 150,
-		action = function(pos, node, active_object_count, active_object_count_wider)
-			--Check we are in the right biome
-			local env = minetest.env
-			local perlin1 = env:get_perlin(112,3, 0.5, 150)
-			local test = perlin1:get2d({x=pos.x, y=pos.z})
-			local in_biome = false
-			local smooth = snow.smooth
-			if smooth and (test > 0.73 or (test > 0.43 and math.random(0,29) > (0.73 - test) * 100 )) then
-				in_biome = true
-			elseif not smooth and test > 0.53 then
-				in_biome = true
-			end
-			if in_biome then
-				--Check if block is under cover
-				local ground_y = nil
-				for y=15,0,-1 do
-					if env:get_node({x=pos.x,y=y+pos.y,z=pos.z}).name ~= "air" then
-						ground_y = pos.y+y
-						break
-					end
-				end
-				if ground_y then
-					local n = env:get_node({x=pos.x,y=ground_y,z=pos.z})
-					if (n.name ~= "snow:snow" and n.name ~= "snow:snow_block" and n.name ~= "snow:ice" and n.name ~= "default:water_source" and n.name ~= "default:papyrus") then
-						local obj = minetest.env:get_objects_inside_radius({x=pos.x,y=ground_y+20,z=pos.z}, 15)
-						for i,v in pairs(obj) do
-							e = v:get_luaentity()
-							if e ~= nil and e.name == "snow:fall_entity" then 
-								return
-							end
-						end
-						snow_fall({x=pos.x,y=ground_y+15,z=pos.z})
-						if snow.debug then
-							print("snowfall at x"..pos.x.." y"..pos.z)
-						end
-					end
-				end
-			end
-		end
-	})
+end
+
+-- Checks if the snow level is even at any given pos.
+-- Smooth Snow
+local function uneven(pos)
+	local num = minetest.get_node_level(pos)
+	local get_node = minetest.get_node
+	local add_node = minetest.add_node
+	local foundx
+	local foundz
+	for z = -1,1 do
+		for x = -1,1 do
+			local p = {x=pos.x+x, y=pos.y, z=pos.z+z}
+			local node = get_node(p)
+			p.y = p.y-1
+			local bnode = get_node(p)
+
+			if node
+			and minetest.registered_nodes[node.name]
+			and minetest.registered_nodes[node.name].drawtype == "plantlike"
+			and bnode.name == "default:dirt_with_grass" then
+				add_node(p, {name="default:dirt_with_snow"})
+				return true
+			end
+
+			p.y = p.y+1
+			if not (x == 0 and z == 0)
+			and node.name == "default:snow"
+			and minetest.get_node_level(p) < num then
+				foundx = x
+				foundz = z
+			elseif node.name == "air"
+			and bnode.name ~= "air"
+			and bnode.name ~= "default:snow" then
+				p.y = p.y-1
+				snow.place(p)
+				return true
+			end
+		end
+	end
+	if foundx then
+		local p = {x=pos.x+foundx, y=pos.y, z=pos.z+foundz}
+		if not is_uneven(p) then
+			minetest.add_node_level(p, 7)
+		end
+		return true
+	end
+end
+
+if snow.smooth_snow then
+	is_uneven = uneven
+else
+	is_uneven = function() end
+end
+
+snow.register_on_configuring(function(name, v)
+	if name == "smooth_snow" then
+		if v then
+			is_uneven = uneven
+		else
+			is_uneven = function() end
+		end
+	end
+end)
+
+
+local time = (minetest.get_us_time() - load_time_start) / 1000000
+local msg = "[snow] loaded after ca. " .. time .. " seconds."
+if time > 0.01 then
+	print(msg)
+else
+	minetest.log("action", msg)
 end

license.txt

@@ -1,3 +1,40 @@
+License of media (snowdrift are from paramat)
+---------------------------
+
+Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0)
+
+You are free to:
+Share — copy and redistribute the material in any medium or format.
+Adapt — remix, transform, and build upon the material for any purpose, even commercially.
+The licensor cannot revoke these freedoms as long as you follow the license terms.
+
+Under the following terms:
+
+Attribution — You must give appropriate credit, provide a link to the license, and
+indicate if changes were made. You may do so in any reasonable manner, but not in any way
+that suggests the licensor endorses you or your use.
+
+ShareAlike — If you remix, transform, or build upon the material, you must distribute
+your contributions under the same license as the original.
+
+No additional restrictions — You may not apply legal terms or technological measures that
+legally restrict others from doing anything the license permits.
+
+Notices:
+
+You do not have to comply with the license for elements of the material in the public
+domain or where your use is permitted by an applicable exception or limitation.
+No warranties are given. The license may not give you all of the permissions necessary
+for your intended use. For example, other rights such as publicity, privacy, or moral
+rights may limit how you use the material.
+
+For more details:
+http://creativecommons.org/licenses/by-sa/3.0/
+
+
+License of source code and other textures.
+----------------------
+
                     GNU GENERAL PUBLIC LICENSE
                        Version 3, 29 June 2007
 

mapgen.lua

@@ -1,303 +0,0 @@
-local pine_tree = {
-	axiom="TABff",
-	rules_a="[&T+f+ff+ff+ff+f]GA",
-	rules_b="[&T+f+Gf+Gf+Gf]GB",
-	trunk="default:tree",
-	leaves="snow:needles",
-	angle=90,
-	iterations=1,
-	random_level=0,
-	trunk_type="single",
-	thin_branches=true,
-}
-local xmas_tree = {
-	axiom="TABff",
-	rules_a="[&T+f+ff+ff+ff+f]GA",
-	rules_b="[&T+f+Gf+Gf+Gf]GB",
-	trunk="default:tree",
-	leaves="snow:needles_decorated",
-	angle=90,
-	iterations=1,
-	random_level=0,
-	trunk_type="single",
-	thin_branches=true,
-}
-
---Makes pine tree
-function snow.make_pine(pos,snow,xmas)
-	local env = minetest.env
-	local perlin1 = env:get_perlin(112,3, 0.5, 150)
-	local try_node = function(pos, node)
-		local n = env:get_node(pos).name
-		if n == "air" or n == "ignore" then
-			env:add_node(pos,node)
-		end
-	end
-	--Clear ground.
-	for x=-1,1 do
-	for z=-1,1 do
-		if env:get_node({x=pos.x+x,y=pos.y,z=pos.z+z}).name == "snow:snow" then
-			env:remove_node({x=pos.x+x,y=pos.y,z=pos.z+z})
-		end
-		if env:get_node({x=pos.x+x,y=pos.y,z=pos.z+z}).name == "snow:snow_block" then
-			env:remove_node({x=pos.x+x,y=pos.y,z=pos.z+z})
-		end
-	end
-	end
-	if xmas then
-		env:remove_node(pos)
-		minetest.env:spawn_tree(pos, xmas_tree)
-	else
-		minetest.env:spawn_tree(pos, pine_tree)
-	end
-	if snow then
-		local x,z = pos.x,pos.z
-		try_node({x=x+1,y=pos.y+3,z=z+1},{name="snow:snow"})
-		try_node({x=x-1,y=pos.y+3,z=z-1},{name="snow:snow"})
-		try_node({x=x-1,y=pos.y+3,z=z+1},{name="snow:snow"})
-		try_node({x=x+1,y=pos.y+3,z=z-1},{name="snow:snow"})
-		
-		try_node({x=x+1,y=pos.y+5,z=z},{name="snow:snow"})
-		try_node({x=x-1,y=pos.y+5,z=z},{name="snow:snow"})
-		try_node({x=x,y=pos.y+5,z=z+1},{name="snow:snow"})
-		try_node({x=x,y=pos.y+5,z=z-1},{name="snow:snow"})
-	end
-	if xmas then
-		try_node({x=pos.x,y=pos.y+7,z=pos.z},{name="snow:star"})
-	elseif snow and perlin1:get2d({x=pos.x,y=pos.z}) > 0.53 then
-		try_node({x=pos.x,y=pos.y+7,z=pos.z},{name="snow:snow"})
-	end
-end
-
-
-
---Snow biomes are found at 0.53 and greater perlin noise.
-minetest.register_on_generated(function(minp, maxp, seed)
-if maxp.y >= -10 then
-		local debug = snow.debug
-
-		--Should make things a bit faster.
-		local env = minetest.env
-
-		--Get map specific perlin
-		local perlin1 = env:get_perlin(112,3, 0.5, 150)
-
-		-- Assume X and Z lengths are equal
-		local divlen = 16
-		local divs = (maxp.x-minp.x);
-		local x0 = minp.x
-		local z0 = minp.z
-		local x1 = maxp.x
-		local z1 = maxp.z
-
-		--Speed hack: checks the corners and middle of the chunk for "snow biome".
-		if not ( perlin1:get2d( {x=x0, y=z0} ) > 0.53 ) 					--top left
-		and not ( perlin1:get2d( { x = x0 + ( (x1-x0)/2), y=z0 } ) > 0.53 )--top middle
-		and not (perlin1:get2d({x=x1, y=z1}) > 0.53) 						--bottom right
-		and not (perlin1:get2d({x=x1, y=z0+((z1-z0)/2)}) > 0.53) 			--right middle
-		and not (perlin1:get2d({x=x0, y=z1}) > 0.53)  						--bottom left
-		and not (perlin1:get2d({x=x1, y=z0}) > 0.53)						--top right
-		and not (perlin1:get2d({x=x0+((x1-x0)/2), y=z1}) > 0.53) 			--left middle
-		and not (perlin1:get2d({x=(x1-x0)/2, y=(z1-z0)/2}) > 0.53) 			--middle
-		and not (perlin1:get2d({x=x0, y=z1+((z1-z0)/2)}) > 0.53) then		--bottom middle
-			return
-		end
-
-		--Choose a biome types.
-		local pr = PseudoRandom(seed+57)
-		local biome
-
-		--Land biomes
-		biome = pr:next(1, 5)
-		local snowy = biome == 1 --spawns alot of snow
-		local plain = biome == 2 --spawns not much
-		local alpine = biome == 3 --rocky terrain
-		-- biome == 4 or biome == 5 -- normal biome
-
-		--Water biomes
-		biome2 = pr:next(1, 5)
-		local cool = biome == 1  --only spawns ice on edge of water
-		local icebergs = biome == 2
-		local icesheet = biome == 3
-		local icecave = biome == 4
-		local icehole = biome == 5 --icesheet with holes
-
-		--Misc biome settings.
-		local icy = pr:next(1, 2) == 2   --If enabled spawns ice in sand instead of snow blocks.
-		local mossy = pr:next(1,2) == 1  --Spawns moss in snow.
-		local shrubs = pr:next(1,2) == 1 --Spawns dry shrubs in snow.
-		local pines = pr:next(1,2) == 1 --spawns pines.
-
-		--Debugging function
-		local biomeToString = function(num,num2)
-			local biome, biome2
-			if num == 1 then biome = "snowy"
-			elseif num == 2 then biome = "plain"
-			elseif num == 3 then biome = "alpine"
-			elseif num == 4 or num == 5 then biome = "normal"
-			else biome =  "unknown "..num end
-
-			if num2 == 1 then biome2 = "cool"
-			elseif num2 == 2 then biome2 = "icebergs"
-			elseif num2 == 3 then biome2 = "icesheet"
-			elseif num2 == 4 then biome2 = "icecave"
-			elseif num2 == 5 then biome2 = "icehole"
-			else biome2 =  "unknown "..num end
-
-			return biome, biome2
-		end
-
-		local make_pine = snow.make_pine
-		local smooth = snow.smooth
-
-		--Reseed random.
-		pr = PseudoRandom(seed+68)
-
-		if alpine then
-			local trees = env:find_nodes_in_area(minp, maxp, {"default:leaves","default:tree"})
-			for i,v in pairs(trees) do
-				env:remove_node(v)
-			end
-		end
-
-		--Loop through chunk.
-		for j=0,divs do
-		for i=0,divs do
-
-			local x = x0+i
-			local z = z0+j
-
-				--Check if we are in a "Snow biome"
-                local in_biome = false
-                local test = perlin1:get2d({x=x, y=z})
-                if smooth and (not snowy) and (test > 0.73 or (test > 0.43 and pr:next(0,29) > (0.73 - test) * 100 )) then
-                    in_biome = true
-                elseif (not smooth or snowy) and test > 0.53 then
-					in_biome = true
-                end
-
-                if in_biome then
-
-                if not plain or pr:next(1,12) == 1 then
-
-					 -- Find ground level (0...15)
-					local ground_y = nil
-					for y=maxp.y,minp.y+1,-1 do
-						if env:get_node({x=x,y=y,z=z}).name ~= "air" then
-							ground_y = y
-							break
-						end
-					end
-
-					-- Snowy biome stuff
-					local node = env:get_node({x=x,y=ground_y,z=z})
-
-					if ground_y and (node.name == "default:dirt_with_grass" or node.name == "default:junglegrass") then
-							local veg
-							if mossy and pr:next(1,10) == 1 then veg = 1 end
-							if alpine then
-								--Gets rid of dirt
-								env:add_node({x=x,y=ground_y+1,z=z}, {name="snow:snow",param2=veg})
-								for y=ground_y,-6,-1 do
-									if env:get_node({x=x,y=y,z=z}) and env:get_node({x=x,y=y,z=z}).name == "default:stone" then
-										break
-									else
-										env:add_node({x=x,y=y,z=z},{name="default:stone"})
-									end
-								end
-							elseif (shrubs and pr:next(1,28) == 1) or node.name == "default:junglegrass" then
-								--Spawns dry shrubs.
-								env:add_node({x=x,y=ground_y,z=z}, {name="snow:dirt_with_snow"})
-								if snowy then
-									env:add_node({x=x,y=ground_y+1,z=z}, {name="snow:snow_block", param2=3})
-								else
-									env:add_node({x=x,y=ground_y+1,z=z}, {name="default:dry_shrub"})
-								end
-							elseif pines and pr:next(1,36) == 1 then
-								--Spawns pines.
-								env:add_node({x=x,y=ground_y,z=z}, {name="default:dirt_with_grass"})
-								make_pine({x=x,y=ground_y+1,z=z},true)
-							elseif snowy then
-								--Spawns snow blocks.
-								env:add_node({x=x,y=ground_y+1,z=z}, {name="snow:snow_block"})
-								env:add_node({x=x,y=ground_y+2,z=z}, {name="snow:snow",param2=veg})
-							else
-								--Spawns snow.
-								env:add_node({x=x,y=ground_y,z=z}, {name="snow:dirt_with_snow"})
-								env:add_node({x=x,y=ground_y+1,z=z}, {name="snow:snow",param2=veg})
-							end
-					elseif ground_y and node.name == "default:sand" then
-						--Spawns ice in sand if icy, otherwise spawns snow on top.
-						if not icy then
-							env:add_node({x=x,y=ground_y+1,z=z}, {name="snow:snow"})
-							env:add_node({x=x,y=ground_y,z=z}, {name="snow:snow_block"})
-						else
-							env:add_node({x=x,y=ground_y,z=z}, {name="snow:ice"})
-						end
-					elseif ground_y and env:get_node({x=x,y=ground_y,z=z}).name == "default:leaves" then
-						env:add_node({x=x,y=ground_y+1,z=z}, {name="snow:snow"})
-					elseif ground_y and env:get_node({x=x,y=ground_y,z=z}).name == "default:papyrus" then
-						for i=ground_y, ground_y-4, -1 do
-							if env:get_node({x=x,y=i,z=z}).name == "default:papyrus" then
-								env:add_node({x=x,y=ground_y+1,z=z}, {name="snow:snow"})
-								env:add_node({x=x,y=i,z=z}, {name="snow:snow_block", param2=2})
-							end
-						end
-					elseif ground_y and node.name == "default:water_source" then
-						if not icesheet and not icecave and not icehole then
-							--Coastal ice.
-							local x1 = env:get_node({x=x+1,y=ground_y,z=z}).name
-							local z1 = env:get_node({x=x,y=ground_y,z=z+1}).name
-							local xz1 = env:get_node({x=x+1,y=ground_y,z=z+1}).name
-							local xz2 = env:get_node({x=x-1,y=ground_y,z=z-1}).name
-							local x2 = env:get_node({x=x-1,y=ground_y,z=z}).name
-							local z2 = env:get_node({x=x,y=ground_y,z=z-1}).name
-							local y = env:get_node({x=x,y=ground_y-1,z=z}).name
-							local rand = pr:next(1,4) == 1
-							if
-							((x1  and x1 ~= "default:water_source"  and x1 ~= "snow:ice"  and x1 ~= "air" and x1 ~= "ignore") or ((cool or icebergs) and x1 == "snow:ice"  and rand)) or
-							((z1  and z1 ~= "default:water_source"  and z1 ~= "snow:ice"  and z1 ~= "air" and z1 ~= "ignore") or ((cool or icebergs) and z1 == "snow:ice"  and rand)) or
-							((xz1 and xz1 ~= "default:water_source" and xz1 ~= "snow:ice" and xz1 ~= "air"and xz1 ~= "ignore") or ((cool or icebergs) and xz1 == "snow:ice" and rand)) or
-							((xz2 and xz2 ~= "default:water_source" and xz2 ~= "snow:ice" and xz2 ~= "air"and xz2 ~= "ignore") or ((cool or icebergs) and xz2 == "snow:ice" and rand)) or
-							((x2  and x2 ~= "default:water_source"  and x2 ~= "snow:ice"  and x2 ~= "air" and x2 ~= "ignore") or ((cool or icebergs) and x2 == "snow:ice"  and rand)) or
-							((z2  and z2 ~= "default:water_source"  and z2 ~= "snow:ice"  and z2 ~= "air" and z2 ~= "ignore") or ((cool or icebergs) and z2 == "snow:ice"  and rand)) or
-							(y ~= "default:water_source" and y ~= "snow:ice" and y ~= "air") or (pr:next(1,6) == 1 and icebergs) then
-									env:add_node({x=x,y=ground_y,z=z}, {name="snow:ice"})
-							end
-						else
-							--Icesheets, Broken icesheet, Icecaves
-							if (icehole and pr:next(1,10) > 1) or icecave or icesheet then
-								env:add_node({x=x,y=ground_y,z=z}, {name="snow:ice"})
-							end
-							if icecave then
-								--Gets rid of water underneath ice
-								for y=ground_y-1,-60,-1 do
-									if env:get_node({x=x,y=y,z=z}) and env:get_node({x=x,y=y,z=z}).name ~= "default:water_source" then
-										break
-									else
-										env:remove_node({x=x,y=y,z=z})
-									end
-								end
-							end
-						end
-					--~ elseif ground_y and node.name == "snow:snow" and node.name ~= "snow:ice" then
-						--~ --Abort genaration.
-						--~ local name = env:get_node({x=x,y=ground_y-1,z=z}).name
-						--~ if name ~= "default:leaves" and name ~= "snow:needles" then
-							--~ if debug then
-								--~ print(biomeToString(biome)..": snow found ABORTED!")
-							--~ end
-							--~ return
-						--~ end
-					end
-				end
-			end
-		end
-		end
-		if debug then
-			biome_string,biome2_string = biomeToString(biome,biome2)
-			print(biome_string.." and "..biome2_string..": Snow Biome Genarated near x"..minp.x.." z"..minp.z)
-		end
-end
-end
-)

mod.conf

@@ -0,0 +1 @@
+name = snow

models/sled.x

@@ -0,0 +1,369 @@
+xof 0303txt 0032
+
+Frame Root {
+  FrameTransformMatrix {
+     1.000000, 0.000000, 0.000000, 0.000000,
+     0.000000, 0.000000, 1.000000, 0.000000,
+     0.000000, 1.000000,-0.000000, 0.000000,
+     0.000000, 0.000000, 0.000000, 1.000000;;
+  }
+  Frame Cube_001 {
+    FrameTransformMatrix {
+       0.000000, 0.149813, 0.000000, 0.000000,
+      -0.149813, 0.000000, 0.000000, 0.000000,
+       0.000000, 0.000000, 0.149813, 0.000000,
+       0.025244, 3.853863,-2.133818, 1.000000;;
+    }
+    Mesh { //Cube_003 Mesh
+      88;
+      -1.000000;53.554752;-1.000000;,
+      -1.000000;-53.189678;-1.000000;,
+       1.000000;-53.189678;-1.000000;,
+       1.000000;53.554752;-1.000000;,
+       0.999999;-53.189678;14.242604;,
+      -1.000000;-53.189678;14.242604;,
+      -1.000000;-53.189678;16.253036;,
+       0.999999;-53.189678;16.253036;,
+       1.000000;-53.189678;-1.000000;,
+       0.999999;-53.189678;14.242604;,
+       1.000000;53.554752;14.242604;,
+       1.000000;53.554752;-1.000000;,
+      -1.000000;-53.189678;-1.000000;,
+      -1.000000;-53.189678;14.242604;,
+       0.999999;-53.189678;14.242604;,
+       1.000000;-53.189678;-1.000000;,
+      -1.000000;53.554752;-1.000000;,
+      -1.000000;53.554752;14.242604;,
+      -1.000000;-53.189678;14.242604;,
+      -1.000000;-53.189678;-1.000000;,
+      -1.000000;53.554752;14.242604;,
+      -1.000000;53.554752;-1.000000;,
+       1.000000;53.554752;-1.000000;,
+       1.000000;53.554752;14.242604;,
+       0.999999;-53.189678;16.253036;,
+      -1.000000;-53.189678;16.253036;,
+      -1.000000;53.554752;16.253036;,
+       1.000000;53.554752;16.253036;,
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+      -50.412270;53.554752;14.242604;,
+      -1.000000;53.554752;14.242604;,
+      -1.000000;53.554752;16.253036;,
+       1.000000;53.554752;14.242604;,
+       0.999999;-53.189678;14.242604;,
+       0.999999;-53.189678;16.253036;,
+       1.000000;53.554752;16.253036;,
+       1.000000;53.554752;16.253036;,
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+      -1.000000;53.554752;14.242604;,
+       1.000000;53.554752;14.242604;,
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+      -52.403629;53.554752;16.253036;,
+      -50.412270;53.554752;16.253036;,
+      -50.412270;-53.189678;16.253036;,
+      -1.000000;-53.189678;14.242604;,
+      -1.000000;53.554752;14.242604;,
+      -50.412270;53.554752;14.242604;,
+      -50.412270;-53.189678;14.242604;,
+      -50.412270;-53.189678;16.253036;,
+      -50.412270;53.554752;16.253036;,
+      -1.000000;53.554752;16.253036;,
+      -1.000000;-53.189678;16.253036;,
+      -1.000000;-53.189678;16.253036;,
+      -1.000000;-53.189678;14.242604;,
+      -50.412270;-53.189678;14.242604;,
+      -50.412270;-53.189678;16.253036;,
+      -52.403629;-53.189678;14.242604;,
+      -52.403629;53.554752;14.242604;,
+      -52.403629;53.554752;16.253036;,
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+      -50.412270;-53.189678;16.253036;,
+      -50.412270;-53.189678;14.242604;,
+      -52.403629;-53.189678;14.242604;,
+      -52.403629;-53.189678;16.253036;,
+      -52.403629;53.554752;16.253036;,
+      -52.403629;53.554752;14.242604;,
+      -50.412270;53.554752;14.242604;,
+      -50.412270;53.554752;16.253036;,
+      -50.412270;53.554752;14.242604;,
+      -52.403629;53.554752;14.242604;,
+      -52.403629;53.554752;-0.989515;,
+      -50.412270;53.554752;-0.989515;,
+      -50.412270;-53.189678;-0.989515;,
+      -50.412270;53.554752;-0.989515;,
+      -52.403629;53.554752;-0.989515;,
+      -52.403629;-53.189678;-0.989515;,
+      -52.403629;-53.189678;-0.989515;,
+      -52.403629;53.554752;-0.989515;,
+      -52.403629;53.554752;14.242604;,
+      -52.403629;-53.189678;14.242604;,
+      -52.403629;-53.189678;14.242604;,
+      -50.412270;-53.189678;14.242604;,
+      -50.412270;-53.189678;-0.989515;,
+      -52.403629;-53.189678;-0.989515;,
+      -50.412270;-53.189678;14.242604;,
+      -50.412270;53.554752;14.242604;,
+      -50.412270;53.554752;-0.989515;,
+      -50.412270;-53.189678;-0.989515;;
+      22;
+      4;0;1;2;3;,
+      4;4;5;6;7;,
+      4;8;9;10;11;,
+      4;12;13;14;15;,
+      4;16;17;18;19;,
+      4;20;21;22;23;,
+      4;24;25;26;27;,
+      4;28;29;30;31;,
+      4;32;33;34;35;,
+      4;36;37;38;39;,
+      4;40;41;42;43;,
+      4;44;45;46;47;,
+      4;48;49;50;51;,
+      4;52;53;54;55;,
+      4;56;57;58;59;,
+      4;60;61;62;63;,
+      4;64;65;66;67;,
+      4;68;69;70;71;,
+      4;72;73;74;75;,
+      4;76;77;78;79;,
+      4;80;81;82;83;,
+      4;84;85;86;87;;
+      MeshNormals { //Cube_003 Normals
+        88;
+         0.000000; 0.000000;-1.000000;,
+         0.000000; 0.000000;-1.000000;,
+         0.000000; 0.000000;-1.000000;,
+         0.000000; 0.000000;-1.000000;,
+         0.000000;-1.000000; 0.000000;,
+         0.000000;-1.000000; 0.000000;,
+         0.000000;-1.000000; 0.000000;,
+         0.000000;-1.000000; 0.000000;,
+         1.000000;-0.000000; 0.000000;,
+         1.000000;-0.000000; 0.000000;,
+         1.000000;-0.000000; 0.000000;,
+         1.000000;-0.000000; 0.000000;,
+         0.000000;-1.000000; 0.000000;,
+         0.000000;-1.000000; 0.000000;,
+         0.000000;-1.000000; 0.000000;,
+         0.000000;-1.000000; 0.000000;,
+        -1.000000; 0.000000;-0.000000;,
+        -1.000000; 0.000000;-0.000000;,
+        -1.000000; 0.000000;-0.000000;,
+        -1.000000; 0.000000;-0.000000;,
+        -0.000000; 1.000000; 0.000000;,
+        -0.000000; 1.000000; 0.000000;,
+        -0.000000; 1.000000; 0.000000;,
+        -0.000000; 1.000000; 0.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+         0.000000;-0.000000; 1.000000;,
+        -0.000000; 1.000000; 0.000000;,
+        -0.000000; 1.000000; 0.000000;,
+        -0.000000; 1.000000; 0.000000;,
+        -0.000000; 1.000000; 0.000000;,
+         1.000000;-0.000000; 0.000000;,
+         1.000000;-0.000000; 0.000000;,
+         1.000000;-0.000000; 0.000000;,
+         1.000000;-0.000000; 0.000000;,
+         0.000000; 1.000000; 0.000000;,
+         0.000000; 1.000000; 0.000000;,
+         0.000000; 1.000000; 0.000000;,
+         0.000000; 1.000000; 0.000000;,
+        -0.000000; 0.000000; 1.000000;,
+        -0.000000; 0.000000; 1.000000;,
+        -0.000000; 0.000000; 1.000000;,
+        -0.000000; 0.000000; 1.000000;,
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+        -0.000000; 0.000000;-1.000000;,
+        -0.000000; 0.000000;-1.000000;,
+        -0.000000; 0.000000; 1.000000;,
+        -0.000000; 0.000000; 1.000000;,
+        -0.000000; 0.000000; 1.000000;,
+        -0.000000; 0.000000; 1.000000;,
+        -0.000000;-1.000000; 0.000000;,
+        -0.000000;-1.000000; 0.000000;,
+        -0.000000;-1.000000; 0.000000;,
+        -0.000000;-1.000000; 0.000000;,
+        -1.000000; 0.000000; 0.000000;,
+        -1.000000; 0.000000; 0.000000;,
+        -1.000000; 0.000000; 0.000000;,
+        -1.000000; 0.000000; 0.000000;,
+        -0.000000;-1.000000; 0.000000;,
+        -0.000000;-1.000000; 0.000000;,
+        -0.000000;-1.000000; 0.000000;,
+        -0.000000;-1.000000; 0.000000;,
+        -0.000000; 1.000000; 0.000000;,
+        -0.000000; 1.000000; 0.000000;,
+        -0.000000; 1.000000; 0.000000;,
+        -0.000000; 1.000000; 0.000000;,
+         0.000000; 1.000000; 0.000000;,
+         0.000000; 1.000000; 0.000000;,
+         0.000000; 1.000000; 0.000000;,
+         0.000000; 1.000000; 0.000000;,
+        -0.000000; 0.000000;-1.000000;,
+        -0.000000; 0.000000;-1.000000;,
+        -0.000000; 0.000000;-1.000000;,
+        -0.000000; 0.000000;-1.000000;,
+        -1.000000; 0.000000; 0.000000;,
+        -1.000000; 0.000000; 0.000000;,
+        -1.000000; 0.000000; 0.000000;,
+        -1.000000; 0.000000; 0.000000;,
+         0.000000;-1.000000;-0.000000;,
+         0.000000;-1.000000;-0.000000;,
+         0.000000;-1.000000;-0.000000;,
+         0.000000;-1.000000;-0.000000;,
+         1.000000; 0.000000; 0.000000;,
+         1.000000; 0.000000; 0.000000;,
+         1.000000; 0.000000; 0.000000;,
+         1.000000; 0.000000; 0.000000;;
+        22;
+        4;0;1;2;3;,
+        4;4;5;6;7;,
+        4;8;9;10;11;,
+        4;12;13;14;15;,
+        4;16;17;18;19;,
+        4;20;21;22;23;,
+        4;24;25;26;27;,
+        4;28;29;30;31;,
+        4;32;33;34;35;,
+        4;36;37;38;39;,
+        4;40;41;42;43;,
+        4;44;45;46;47;,
+        4;48;49;50;51;,
+        4;52;53;54;55;,
+        4;56;57;58;59;,
+        4;60;61;62;63;,
+        4;64;65;66;67;,
+        4;68;69;70;71;,
+        4;72;73;74;75;,
+        4;76;77;78;79;,
+        4;80;81;82;83;,
+        4;84;85;86;87;;
+      } //End of Cube_003 Normals
+      MeshMaterialList { //Cube_003 Material List
+        1;
+        22;
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0;;
+        Material Material {
+           0.640000; 0.640000; 0.640000; 1.000000;;
+           96.078431;
+           0.500000; 0.500000; 0.500000;;
+           0.000000; 0.000000; 0.000000;;
+        }
+      } //End of Cube_003 Material List
+      MeshTextureCoords { //Cube_003 UV Coordinates
+        88;
+         0.973358; 0.999965;,
+         0.975236; 0.387889;,
+         0.986704; 0.387924;,
+         0.984826; 1.000000;,
+         0.706578; 0.081368;,
+         0.706614; 0.092836;,
+         0.695086; 0.092871;,
+         0.695051; 0.081403;,
+         0.593305; 0.387924;,
+         0.680706; 0.387656;,
+         0.682584; 0.999732;,
+         0.595183; 1.000000;,
+         0.794015; 0.092568;,
+         0.706614; 0.092836;,
+         0.706578; 0.081368;,
+         0.793980; 0.081100;,
+         0.882261; 1.000000;,
+         0.794859; 0.999732;,
+         0.796737; 0.387656;,
+         0.884139; 0.387924;,
+         0.806422; 0.375920;,
+         0.893824; 0.376188;,
+         0.893789; 0.387656;,
+         0.806387; 0.387388;,
+         0.000000; 0.387924;,
+         0.011468; 0.387889;,
+         0.013346; 0.999965;,
+         0.001878; 1.000000;,
+         0.795764; 0.092553;,
+         0.807291; 0.092589;,
+         0.806422; 0.375920;,
+         0.794894; 0.375885;,
+         0.682584; 0.999732;,
+         0.680706; 0.387656;,
+         0.692234; 0.387621;,
+         0.694112; 0.999696;,
+         0.794859; 0.387353;,
+         0.794894; 0.375885;,
+         0.806422; 0.375920;,
+         0.806387; 0.387388;,
+         0.306218; 0.386985;,
+         0.308096; 0.999061;,
+         0.296677; 0.999096;,
+         0.294799; 0.387020;,
+         0.593305; 0.387924;,
+         0.591427; 1.000000;,
+         0.308096; 0.999131;,
+         0.309974; 0.387055;,
+         0.294799; 0.387020;,
+         0.296677; 0.999096;,
+         0.013346; 0.999965;,
+         0.011468; 0.387889;,
+         0.695086; 0.092871;,
+         0.706614; 0.092836;,
+         0.707483; 0.376167;,
+         0.695955; 0.376202;,
+         0.707518; 0.387656;,
+         0.705640; 0.999732;,
+         0.694112; 0.999697;,
+         0.695990; 0.387621;,
+         0.695955; 0.376202;,
+         0.707483; 0.376167;,
+         0.707518; 0.387586;,
+         0.695990; 0.387621;,
+         0.795799; 0.081135;,
+         0.807326; 0.081170;,
+         0.807291; 0.092589;,
+         0.795764; 0.092553;,
+         0.807291; 0.092589;,
+         0.807326; 0.081170;,
+         0.894668; 0.081438;,
+         0.894633; 0.092856;,
+         0.988581; 1.000000;,
+         0.986704; 0.387924;,
+         0.998122; 0.387889;,
+         1.000000; 0.999965;,
+         0.794859; 0.387924;,
+         0.792981; 1.000000;,
+         0.705640; 0.999732;,
+         0.707518; 0.387656;,
+         0.707518; 0.387586;,
+         0.707483; 0.376167;,
+         0.794824; 0.375899;,
+         0.794859; 0.387318;,
+         0.884138; 0.999732;,
+         0.886016; 0.387656;,
+         0.973358; 0.387924;,
+         0.971480; 1.000000;;
+      } //End of Cube_003 UV Coordinates
+    } //End of Cube_003 Mesh
+  } //End of Cube_001
+} //End of Root Frame

other_textures/inkscape_default_ice.svg

@@ -0,0 +1,67 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
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+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
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+   height="16"
+   id="svg2"
+   version="1.1"
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+   sodipodi:docname="inkscape_default_ice.svg">
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+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
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+     inkscape:window-y="70"
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+     id="metadata7">
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+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
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+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
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+     transform="translate(0,-1036.3622)">
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+       style="fill:#91d2ff;fill-rule:evenodd;stroke:none;fill-opacity:1;opacity:0.90000000000000002"
+       id="rect2985"
+       width="16"
+       height="16"
+       x="0"
+       y="1036.3622"
+       inkscape:export-xdpi="90"
+       inkscape:export-ydpi="90"
+       inkscape:export-filename="/home/trickpaint/Minetest/Minetest_game_stuff/049_modtest/worlds/developing_snow_overhaul/worldmods/snow_developing/snow/textures/default_ice.png" />
+  </g>
+</svg>

readme.txt

@@ -1,89 +1,86 @@
-   _____                       __  __           _ 
+   _____                       __  __           _
   / ____|                     |  \/  |         | |
  | (___  _ __   _____      __ | \  / | ___   __| |
   \___ \| '_ \ / _ \ \ /\ / / | |\/| |/ _ \ / _` |
   ____) | | | | (_) \ V  V /  | |  | | (_) | (_| |
  |_____/|_| |_|\___/ \_/\_/   |_|  |_|\___/ \__,_|
-  
-By Splizard, bob and cornernote.
+
+					Version 4.0
+
+By Splizard, HybridDog and LazyJ.
+
+Minetest version:  0.4.16+
+Depends: default
+License:  GPL v3
+
+Complimentary Mods:
+---------------------
+*	"More Blocks" by Calinou (2014_05_11 or newer)
+*	"Skins" by Zeg9
+
+Install:
 
 Forum post: http://minetest.net/forum/viewtopic.php?id=2290
 Github: https://github.com/Splizard/minetest-mod-snow
+Website: http://splizard.com/minetest/mods/snow/
 
 INSTALL:
 ----------
 Place this folder in your minetest mods folder.
+(http://dev.minetest.net/Installing_Mods)
 
-NOTICE
-While this mod is installed you may experience slow map loading while a snow biome is generated.
+	* After downloading, unzip the file.
+	* Rename the directory "minetest-mod-snow-master" to "snow"
+	* Copy the "snow" directory into either
+	../minetest/worlds/yourworld'sname/worldmods/
+	or
+	../minetest/mods/
+	* If you put "snow" in the ../minetest/mods/ directory, either
+	enable the mod from within Minetest's "Configure" button
+	(main menu, bottom right) or by adding this line to the
+	world's "world.mt" file:
+	load_mod_snow = true
 
 USAGE:
 -------
-If you walk around a bit you will find snow biomes scattered around the world.
-
-There are nine biome types:
-* Normal
-* Icebergs
-* Icesheet
-* Broken icesheet
-* Icecave
-* Coast
-* Alpine
-* Snowy
-* Plain
-  
-Snow can be picked up and thrown as snowballs or crafted into snow blocks.
+Snow can be picked up and thrown as snowballs or stacked into snow blocks.
 Snow and ice melts when near warm blocks such as torches or igniters such as lava.
 Snow blocks freeze water source blocks around them.
 Moss can be found in the snow, when moss is placed near cobble it spreads.
 Christmas trees can be found when digging pine needles.
+Sleds allow for faster travel on snow.
 
 CRAFTING:
 -----------
-Snow Block:
-
-Snowball    Snowball
-Snowball    Snowball
-
 Snow Brick:
 
 Snow Block    Snow Block
 Snow Block    Snow Block
 
+Sled:
+				Stick
+Wood	Wood	Wood
+
+Icy Snow:
+
+Snow	Ice
+Ice		Snow
+
+Config file:
+------------
+You can change various settings from the advanced settings in Minetest.
+
+
+	* Go to the settings tab.
+	* Click on Advanced Settings.
+	* Click on Mods.
+	* Click on snow.
+	* Change stuff!
+
 UNINSTALL:
 ------------
 Simply delete the folder snow from the mods folder.
 
-CHANGELOG:
-------------
-Version 1.4
 
-    New biomes, snowy and plain
-    
-    Christmas Trees
-    
-    Snowfall
-    
-Version 1.3
-
-    Smooth transitions
-    
-    Snow Bricks
-
-Version 1.2
-
-    Pine trees
-    
-    Moss
-    
-    Alpine biomes
-	
-    Dry shrubs
-
-Version 1.1
-
-    Better mapgen
-
-Version 1.0
-
-    Initial release
+TODO:
+— test if the fixed ground_y search works correctly at chunkcorners at ground level

settingtypes.txt

@@ -0,0 +1,39 @@
+#The gravity of thrown snowballs.
+snow_snowball_gravity (Snowball Gravity) float 0.91
+
+#How fast players throw snowballs.
+snow_snowball_velocity (Snowball Velocity) float 19
+
+#Enable/Disable sleds.
+snow_sleds (Enable Sleds) bool true
+
+#Enables falling snow.
+snow_enable_snowfall (Enable Snowfall) bool true
+
+#Reduces the amount of resources and fps used by snowfall.
+snow_lighter_snowfall (Use Light Snowfall) bool false
+
+#Enables debug output. Currently it only prints mgv6 info.
+snow_debug (Debug Mode) bool false
+
+#Disable this to remove christmas saplings from being found.
+snow_christmas_content (Enable Christmas Content) bool true
+
+#Enables smooth biome transitions.
+snow_smooth_biomes (Smooth Biome Transitions) bool true
+
+#The minumum height a snow biome will generate (mgv7)
+snow_min_height (Minumum Height for Snow Biomes) int 3
+
+#Disable this to stop snow from being smoothed.
+snow_smooth_snow (Multiple Snow Levels) bool true
+
+#mapgen rarity in %. Note that this and mapgen_size do not work right because
+#sinus instead of Gauss curve is used as estimation.
+snow_mapgen_rarity (Snow Biome Rarity %) float 18
+
+#size of the generated… (has an effect to the rarity, too)
+snow_mapgen_size (Snow Biome Size) float 210
+
+#Minetest finally has capable snow biomes by default, lets not mess it up with the old snowgen.
+snow_disable_mapgen (Disable mod-generated biomes) bool true

src/abms.lua

@@ -0,0 +1,218 @@
+-- Added to change dirt_with_snow to dirt if covered with blocks that don't let
+-- light through (sunlight_propagates) or have a light paramtype and
+-- liquidtype combination. ~ LazyJ, 2014_03_08
+
+--[[minetest.register_abm({
+	nodenames = {"default:dirt_with_snow"},
+	interval = 2,
+	chance = 20,
+	action = function(pos)
+		local name = minetest.get_node({x=pos.x, y=pos.y+1, z=pos.z}).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
+})
+]]--
+
+
+--Melting
+--Any node part of the group melting will melt when near warm nodes such as lava, fire, torches, etc.
+--The amount of water that replaces the node is defined by the number on the group:
+--1: one water_source
+--2: four water_flowings
+--3: one water_flowing
+
+minetest.register_abm({
+	nodenames = {"group:melts"},
+	neighbors = {"group:igniter", "default:torch", "default:torch_wall", "default:furnace_active", "group:hot"},
+	interval = 10,
+	chance = 2,
+	action = function(pos, node)
+		local intensity = minetest.get_item_group(node.name,"melts")
+		if intensity == 1 then
+			minetest.set_node(pos, {name="default:water_source"})
+		elseif intensity == 2 then
+			minetest.set_node(pos, {name="default:water_flowing", param2=7})
+		elseif intensity == 3 then
+			minetest.set_node(pos, {name="default:water_flowing", param2=3})
+		--[[	LazyJ, you need to add param2, which defines the amount of the flowing water ~ HybridDog 2015_03_06
+			This was causing "melts=2" nodes to just disappear so I changed it to replace the
+			node with a water_source for a couple seconds and then replace the water_source with
+			air. This way it made a watery mess that quickly evaporated. ~ LazyJ 2014_04_24
+			local check_place = function(pos,node)
+				if minetest.get_node(pos).name == "air" then
+					minetest.place_node(pos,node)
+				end
+			end
+			minetest.add_node(pos,{name="default:water_flowing"})
+			check_place({x=pos.x+1,y=pos.y,z=pos.z},{name="default:water_flowing"})
+			check_place({x=pos.x-1,y=pos.y,z=pos.z},{name="default:water_flowing"})
+			check_place({x=pos.x,y=pos.y+1,z=pos.z},{name="default:water_flowing"})
+			check_place({x=pos.x,y=pos.y-1,z=pos.z},{name="default:water_flowing"})
+		elseif intensity == 3 then
+		--]
+			minetest.add_node(pos,{name="default:water_source"})
+				minetest.after(2, function()  -- 2 seconds gives just enough time for
+											-- the water to flow and spread before the
+											-- water_source is changed to air. ~ LazyJ
+					if minetest.get_node(pos).name == "default:water_source" then
+						 minetest.add_node(pos,{name="air"})
+					 end
+				 end)
+		--]]
+		 else
+			return
+		end
+	end,
+})
+
+
+
+
+--Freezing
+--Water freezes when in contact with snow.
+--[[
+minetest.register_abm({
+	nodenames = {"default:water_source"},
+	-- Added "group:icemaker" and snowbrick. ~ LazyJ
+	neighbors = {"default:snow", "default:snowblock", "snow:snow_brick", "group:icemaker"},
+	interval = 20,
+	chance = 4,
+	action = function(pos)
+		minetest.add_node(pos,{name="default:ice"})
+	end,
+})
+
+--Freeze Ice according to it's param2 value.
+minetest.register_abm({
+	nodenames = {"default:ice"},
+	neighbors = {"default:water_source"},
+	interval = 20,
+	chance = 4,
+	action = function(pos, node)
+		if node.param2 == 0 then
+			return
+		end
+		for l = 0,1 do
+			for i = -1,1,2 do
+				for _,p in pairs({
+					{x=pos.x+i, z=pos.z-l*i},
+					{x=pos.x+l*i, z=pos.z+i}
+				}) do
+					if math.random(2) == 2 then
+						p.y = pos.y
+						if minetest.get_node(p).name == "default:water_source" then
+							minetest.add_node(p, {
+								name = "default:ice",
+								param2 = math.random(0,node.param2-1)
+							})
+						end
+					end
+				end
+			end
+		end
+		if math.random(8) == 8 then
+			minetest.add_node(pos, {name="default:water_source"})
+		else
+			node.param2 = 0
+			minetest.add_node(pos, node)
+		end
+	end,
+})
+]]--
+
+
+--Spread moss to cobble.
+minetest.register_abm({
+	nodenames = {"default:cobble"},
+	neighbors = {"snow:moss"},
+	interval = 20,
+	chance = 6,
+	catch_up = false,
+	action = function(pos, node)
+		node.name = "default:mossycobble"
+		minetest.add_node(pos, node)
+	end,
+})
+
+
+
+--[[
+--Grow Pine Saplings
+minetest.register_abm({
+	nodenames = {"snow:sapling_pine"},
+	interval = 10,
+	chance = 50,
+	action = function(pos)
+
+-- Check if there is enough vertical-space for the sapling to grow without
+-- hitting anything else.  ~ LazyJ, 2014_04_10
+
+		-- 'If' there is air in each of the 8 nodes dirctly above the sapling,... ~LazyJ
+		for i = 1,8 do
+			if minetest.get_node({x=pos.x, y=pos.y+i, z=pos.z}).name ~= "air" then
+				return
+			end
+		end
+		-- 'then' let the sapling grow into a tree. ~ LazyJ
+
+		snow.make_pine(pos,false)
+		-- This finds the sapling under the grown tree. ~ LazyJ
+		if minetest.get_node(pos).name == "snow:sapling_pine" then
+			   -- This switches the sapling to a tree trunk. ~ LazyJ
+			minetest.set_node(pos, {name="default:pine_tree"})
+			   -- This is more for testing but it may be useful info to some admins when
+			   -- grepping the server logs too. ~ LazyJ
+			minetest.log("action", "A pine sapling grows into a tree at "..minetest.pos_to_string(pos))
+		end
+	end
+})
+
+
+
+--Grow Christmas Tree Saplings
+minetest.register_abm({
+	nodenames = {"snow:xmas_tree"},
+	interval = 10,
+	chance = 50,
+	action = function(pos)
+
+		-- 'If' there is air in each of the 8 nodes dirctly above the sapling,... ~LazyJ
+		for i = 1,8 do
+			if minetest.get_node({x=pos.x, y=pos.y+i, z=pos.z}).name ~= "air" then
+				return
+			end
+		end
+		-- 'then' let the sapling grow into a tree. ~ LazyJ
+
+		snow.make_pine(pos,false,true)
+		minetest.log("action", "A pine sapling grows into a Christmas tree at "..minetest.pos_to_string(pos)) -- ~ LazyJ
+		--else  -- 'Else', if there isn't air in each of the 8 nodes above the sapling,
+				-- then don't anything; including not allowing the sapling to grow.
+				-- ~ LazyJ, 2014_04_10
+		--end
+	end
+})
+
+]]--
+
+
+--Backwards Compatability.
+--[[
+minetest.register_abm({
+	nodenames = {"snow:snow1","snow:snow2","snow:snow3","gsnow4","snow:snow5","snow:snow6","snow:snow7","snow:snow8"},
+	interval = 1,
+	chance = 1,
+	action = function(pos, node)
+		minetest.add_node(pos, {name="default:snow"})
+		minetest.set_node_level(pos, 7*(tonumber(node.name:sub(-1))))
+	end,
+})
+]]--

src/aliases.lua

@@ -0,0 +1,110 @@
+-- Some aliases for compatibility switches and some to make "/give" commands
+-- a little easier
+
+minetest.register_alias("snow:snow", "default:snow")
+minetest.register_alias("default_snow", "default:snow")
+minetest.register_alias("snow:snowball", "default:snow")
+minetest.register_alias("snowball", "default:snow")
+minetest.register_alias("snowballs", "default:snow")
+minetest.register_alias("snow_ball", "default:snow")
+minetest.register_alias("snow:ice", "default:ice")
+minetest.register_alias("ice", "default:ice")
+minetest.register_alias("default_ice", "default:ice")
+minetest.register_alias("snow:dirt_with_snow", "default:dirt_with_snow")
+minetest.register_alias("dirtwithsnow", "default:dirt_with_snow")
+minetest.register_alias("snowdirt", "default:dirt_with_snow")
+minetest.register_alias("snowydirt", "default:dirt_with_snow")
+minetest.register_alias("snow:snow_block", "default:snowblock")
+minetest.register_alias("default:snow_block", "default:snowblock")
+minetest.register_alias("snowblocks", "default:snowblock")
+minetest.register_alias("snowbrick", "snow:snow_brick")
+minetest.register_alias("bricksnow", "snow:snow_brick")
+minetest.register_alias("snowbricks", "snow:snow_brick")
+minetest.register_alias("snowybricks", "snow:snow_brick")
+minetest.register_alias("icysnow", "snow:snow_cobble")
+minetest.register_alias("snowcobble", "snow:snow_cobble")
+minetest.register_alias("snowycobble", "snow:snow_cobble")
+minetest.register_alias("cobblesnow", "snow:snow_cobble")
+
+
+-- To clean up my first stairsplus attempt.
+-- Stair
+--[[
+minetest.register_alias(":default:stair_snowblock", "moreblocks:stair_snowblock")
+minetest.register_alias(":default:stair_snowblock_half", "moreblocks:stair_snowblock_half")
+minetest.register_alias(":default:stair_snowblock_right_half", "moreblocks:stair_snowblock_right_half")
+minetest.register_alias(":default:stair_snowblock_inner", "moreblocks:stair_snowblock_inner")
+minetest.register_alias(":default:stair_snowblock_outer", "moreblocks:stair_snowblock_outer")
+minetest.register_alias(":default:stair_snowblock_alt", "moreblocks:stair_snowblock_alt")
+minetest.register_alias(":default:stair_snowblock_alt_1", "moreblocks:stair_snowblock_alt_1")
+minetest.register_alias(":default:stair_snowblock_alt_2", "moreblocks:stair_snowblock_2")
+minetest.register_alias(":default:stair_snowblock_alt_4", "moreblocks:stair_snowblock_alt_4")
+
+minetest.register_alias(":default:stair_ice", "moreblocks:stair_ice")
+minetest.register_alias(":default:stair_ice_half", "moreblocks:stair_ice_half")
+minetest.register_alias(":default:stair_ice_right_half", "moreblocks:stair_ice_right_half")
+minetest.register_alias(":default:stair_ice_inner", "moreblocks:stair_ice_inner")
+minetest.register_alias(":default:stair_ice_outer", "moreblocks:stair_ice_outer")
+minetest.register_alias(":default:stair_ice_alt", "moreblocks:stair_ice_alt")
+minetest.register_alias(":default:stair_ice_alt_1", "moreblocks:stair_ice_alt_1")
+minetest.register_alias(":default:stair_ice_alt_2", "moreblocks:stair_ice_2")
+minetest.register_alias(":default:stair_ice_alt_4", "moreblocks:stair_ice_alt_4")
+
+
+-- Slab
+minetest.register_alias(":default:slab_snowblock", "moreblocks:slab_snowblock")
+minetest.register_alias(":default:slab_snowblock_quarter", "moreblocks:slab_snowblock_quarter")
+minetest.register_alias(":default:slab_snowblock_three_quarter", "moreblocks:slab_snowblock_three_quarter")
+minetest.register_alias(":default:slab_snowblock_1", "moreblocks:slab_snowblock_1")
+minetest.register_alias(":default:slab_snowblock_2", "moreblocks:slab_snowblock_2")
+minetest.register_alias(":default:slab_snowblock_14", "moreblocks:slab_snowblock_14")
+minetest.register_alias(":default:slab_snowblock_15", "moreblocks:slab_snowblock_15")
+
+minetest.register_alias(":default:slab_ice", "moreblocks:slab_ice")
+minetest.register_alias(":default:slab_ice_quarter", "moreblocks:slab_ice_quarter")
+minetest.register_alias(":default:slab_ice_three_quarter", "moreblocks:slab_ice_three_quarter")
+minetest.register_alias(":default:slab_ice_1", "moreblocks:slab_ice_1")
+minetest.register_alias(":default:slab_ice_2", "moreblocks:slab_ice_2")
+minetest.register_alias(":default:slab_ice_14", "moreblocks:slab_ice_14")
+minetest.register_alias(":default:slab_ice_15", "moreblocks:slab_ice_15")
+
+
+-- Panel
+minetest.register_alias(":default:panel_snowblock", "moreblocks:panel_snowblock")
+minetest.register_alias(":default:panel_snowblock_1", "moreblocks:panel_snowblock_1")
+minetest.register_alias(":default:panel_snowblock_2", "moreblocks:panel_snowblock_2")
+minetest.register_alias(":default:panel_snowblock_4", "moreblocks:panel_snowblock_4")
+minetest.register_alias(":default:panel_snowblock_12", "moreblocks:panel_snowblock_12")
+minetest.register_alias(":default:panel_snowblock_14", "moreblocks:panel_snowblock_14")
+minetest.register_alias(":default:panel_snowblock_15", "moreblocks:panel_snowblock_15")
+
+minetest.register_alias(":default:panel_ice", "moreblocks:panel_ice")
+minetest.register_alias(":default:panel_ice_1", "moreblocks:panel_ice_1")
+minetest.register_alias(":default:panel_ice_2", "moreblocks:panel_ice_2")
+minetest.register_alias(":default:panel_ice_4", "moreblocks:panel_ice_4")
+minetest.register_alias(":default:panel_ice_12", "moreblocks:panel_ice_12")
+minetest.register_alias(":default:panel_ice_14", "moreblocks:panel_ice_14")
+minetest.register_alias(":default:panel_ice_15", "moreblocks:panel_ice_15")
+
+
+-- Micro
+minetest.register_alias(":default:micro_snowblock", "moreblocks:micro_snowblock")
+minetest.register_alias(":default:micro_snowblock_1", "moreblocks:micro_snowblock_1")
+minetest.register_alias(":default:micro_snowblock_2", "moreblocks:micro_snowblock_2")
+minetest.register_alias(":default:micro_snowblock_4", "moreblocks:micro_snowblock_4")
+minetest.register_alias(":default:micro_snowblock_12", "moreblocks:micro_snowblock_12")
+minetest.register_alias(":default:micro_snowblock_14", "moreblocks:micro_snowblock_14")
+minetest.register_alias(":default:micro_snowblock_15", "moreblocks:micro_snowblock_15")
+
+minetest.register_alias(":default:micro_ice", "moreblocks:micro_ice")
+minetest.register_alias(":default:micro_ice_1", "moreblocks:micro_ice_1")
+minetest.register_alias(":default:micro_ice_2", "moreblocks:micro_ice_2")
+minetest.register_alias(":default:micro_ice_4", "moreblocks:micro_ice_4")
+minetest.register_alias(":default:micro_ice_12", "moreblocks:micro_ice_12")
+minetest.register_alias(":default:micro_ice_14", "moreblocks:micro_ice_14")
+minetest.register_alias(":default:micro_ice_15", "moreblocks:micro_ice_15")
+]]--
+-- If christmas_craft then override his star with this mod one.
+if minetest.get_modpath("christmas_craft") then
+	minetest.register_alias_force("christmas_craft:christmas_star", "snow:star")
+end

src/crafting.lua

@@ -0,0 +1,216 @@
+--[[
+
+Crafting Sections (in order, top to bottom):
+	1. Cooking
+	2. Crafting and Recycling
+
+The crafting recipe for the sled is in the sled.lua file.
+
+~ LazyJ
+
+]]
+
+
+-- 1. Cooking
+
+--[[
+"Cooks_into_ice" is a custom group I assigned to full-sized, snow-stuff nodes
+(snow bricks, snow cobble, snow blocks, etc.) so I wouldn't have to write an individual cooking
+recipe for each one.
+
+~ LazyJ
+]]
+
+minetest.register_craft({
+	type = "cooking",
+	cooktime = 12,
+	output = "default:ice",
+	recipe = "group:cooks_into_ice",
+})
+
+
+
+
+
+
+-- 2. Crafting and Recycling
+
+-- Let's make moss craftable so players can more easily create mossycobble and
+-- gives another useful purpose to pine needles. ~ LazyJ
+
+minetest.register_craft({
+	output = "snow:moss",
+	recipe = {
+		{"snow:needles", "snow:needles"},
+		{"snow:needles", "snow:needles"},
+	},
+})
+
+
+--[[
+Most snow biomes are too small to provide enough snow as a building material and
+still have enough landscape snow to create the wintry surroundings of a
+snow village or castle. So I added this snowblock crafting recipe as a way for
+players to increase their snow supply in small increments. I considered making
+the output 9 but that would make it all too quick and easy (especially for griefers) to create lots
+of snowblocks (and then use them to water-grief by melting the snow blocks).
+
+~ LazyJ
+
+]]--
+
+minetest.register_craft({
+	type = "shapeless",
+	output = "default:snowblock 2",
+	recipe = {
+		"snow:snow_cobble",
+		"snow:snow_cobble"
+	}
+})
+
+
+
+--[[minetest.register_craft({
+	type = "shapeless",
+	output = "default:snowblock 3",
+	recipe = {
+		"default:snowblock",
+		"default:snowblock"
+	}
+})]]--
+
+
+
+minetest.register_craft({
+	output = "snow:snow_brick",
+	recipe = {
+		{"default:snowblock", "default:snowblock"},
+		{"default:snowblock", "default:snowblock"}
+	}
+})
+
+-- Why not recycle snow_bricks back into snowblocks? ~ LazyJ
+minetest.register_craft({
+	output = "default:snowblock 4",
+	recipe = {
+		{"snow:snow_brick"}
+	}
+})
+
+
+minetest.register_craft({
+	output = "snow:ice_brick",
+	recipe = {
+		{"default:ice", "default:ice"},
+		{"default:ice", "default:ice"}
+	}
+})
+
+minetest.register_craft({
+	output = "snow:snow_cobble 6",
+	recipe = {
+		{"snow:ice_brick"}
+	}
+})
+
+
+--Craft icy snow.
+minetest.register_craft({
+	type = "shapeless",
+	output = "snow:snow_cobble 6",
+	recipe = {
+		"default:snow",
+		"default:snow",
+		"default:snow",
+		"default:snow",
+		"default:snow",
+		"default:snow",
+		"default:ice",
+		"default:ice",
+		"default:ice"
+	}
+})
+
+
+minetest.register_craft({
+	type = "shapeless",
+	output = "snow:snow_cobble 4",
+	recipe = {
+		"default:snow",
+		"default:snow",
+		"default:snow",
+		"default:snow",
+		"default:ice",
+		"default:ice"
+	}
+})
+
+minetest.register_craft({
+	type = "shapeless",
+	output = "snow:snow_cobble 2",
+	recipe = {
+		"default:snow",
+		"default:snow",
+		"default:ice"
+	}
+})
+
+minetest.register_craft({
+	type = "shapeless",
+	output = "snow:snow_cobble",
+	recipe = {
+		"default:snow",
+		"default:ice"
+	}
+})
+
+
+
+-- Recycle basic, half-block, slabs back into full blocks
+
+-- A little "list" magic here. Instead of writing four crafts I only have to write two. ~ LazyJ
+local recycle_default_slabs = {
+	"ice",
+	"snowblock",
+}
+
+for _, name in pairs(recycle_default_slabs) do
+	local subname_default = name
+
+	-- This craft is for default snowblocks and default ice.
+	-- 1 crafting recipe handles 2, default blocks. ~ LazyJ
+	minetest.register_craft({
+		type = "shapeless",
+		output = "default:"..subname_default,
+		recipe = {
+			"snow:slab_"..subname_default,
+			"snow:slab_"..subname_default,
+		}
+	})
+end
+
+
+
+-- Similar list magic here too. I couldn't successfully combine these in the first list
+-- because we are dealing with slabs/blocks from two different mods, the "Snow" mod and
+-- minetest_game's "Default" mod. ~ LazyJ
+
+local recycle_snowmod_slabs = {
+	"snow_brick",
+	"snow_cobble",
+}
+
+for _, name in pairs(recycle_snowmod_slabs) do
+	local subname_snowmod = name
+
+	-- This craft is for the Snow mod's full-sized blocks.
+	-- 1 crafting recipe handles 2, or more, Snow mod blocks. ~ LazyJ
+	minetest.register_craft({
+		type = "shapeless",
+		output = "snow:"..subname_snowmod,
+		recipe = {
+			"snow:slab_"..subname_snowmod,
+			"snow:slab_"..subname_snowmod,
+		}
+	})
+end

src/falling_snow.lua

@@ -0,0 +1,211 @@
+-- Parameters
+
+local function snow_fall(pos)
+	local ground_y = nil
+	for y=pos.y+10,pos.y+20,1 do
+		local n = minetest.get_node({x=pos.x,y=y,z=pos.z}).name
+		if n ~= "air" and n ~= "ignore" then
+			return
+		end
+	end
+	for y=pos.y+9,pos.y-15,-1 do
+		local n = minetest.get_node({x=pos.x,y=y,z=pos.z}).name
+		if n ~= "air" and n ~= "ignore" then
+			ground_y = y
+			break
+		end
+	end
+	if not ground_y then
+		return
+	end
+
+	pos = {x=pos.x, y=ground_y, z=pos.z}
+
+	snow.place(pos, true)
+	--minetest.place_node({x=pos.x, y=pos.y+2, z=pos.z}, {name="default:snow"}) -- LazyJ
+end
+
+local YLIMIT = 1 -- Set to world's water level
+				-- Particles are timed to disappear at this y
+				-- Particles do not spawn when player's head is below this y
+local PRECSPR = 6 -- Time scale for precipitation variation in minutes
+local PRECOFF = -0.4 -- Precipitation offset, higher = rains more often
+local GSCYCLE = 0.5 -- Globalstep cycle (seconds)
+local FLAKES = 32 -- Snowflakes per cycle
+--~ local DROPS = 128 -- Raindrops per cycle
+--~ local RAINGAIN = 0.2 -- Rain sound volume
+local COLLIDE = false -- Whether particles collide with nodes
+local NISVAL = 39 -- Clouds RGB value at night
+local DASVAL = 175 -- Clouds RGB value in daytime
+
+local np_prec = {
+	offset = 0,
+	scale = 1,
+	spread = {x = PRECSPR, y = PRECSPR, z = PRECSPR},
+	seed = 813,
+	octaves = 1,
+	persist = 0,
+	lacunarity = 2.0,
+	--flags = ""
+}
+
+-- These 2 must match biome heat and humidity noise parameters for a world
+
+local np_temp = {
+	offset = 50,
+	scale = 50,
+	spread = {x = 1000, y = 1000, z = 1000},
+	seed = 5349,
+	octaves = 3,
+	persist = 0.5,
+	lacunarity = 2.0,
+	--flags = ""
+}
+
+local np_humid = {
+	offset = 50,
+	scale = 50,
+	spread = {x = 1000, y = 1000, z = 1000},
+	seed = 842,
+	octaves = 3,
+	persist = 0.5,
+	lacunarity = 2.0,
+	--flags = ""
+}
+
+
+-- Stuff
+
+local difsval = DASVAL - NISVAL
+local grad = 14 / 95
+local yint = 1496 / 95
+
+
+
+-- Globalstep function
+local timer = 0
+
+if snow.enable_snowfall then
+	minetest.register_globalstep(function(dtime)
+		timer = timer + dtime
+		if timer < GSCYCLE then
+			return
+		end
+
+		timer = 0
+
+		for _, player in ipairs(minetest.get_connected_players()) do
+			local player_name = player:get_player_name()
+			local pos_player = player:get_pos()
+			local pposy = math.floor(pos_player.y) + 2 -- Precipitation when swimming
+			if pposy >= YLIMIT - 2 then
+				local pposx = math.floor(pos_player.x)
+				local pposz = math.floor(pos_player.z)
+				local ppos = {x = pposx, y = pposy, z = pposz}
+
+				local nobj_temp = minetest.get_perlin(np_temp)
+				local nobj_humid = minetest.get_perlin(np_humid)
+				local nobj_prec = minetest.get_perlin(np_prec)
+
+				local nval_temp = nobj_temp:get_2d({x = pposx, y = pposz})
+				local nval_humid = nobj_humid:get_2d({x = pposx, y = pposz})
+				local nval_prec = nobj_prec:get_2d({x = os.clock() / 60, y = 0})
+
+				-- Biome system: Frozen biomes below heat 35,
+				-- deserts below line 14 * t - 95 * h = -1496
+				-- h = (14 * t + 1496) / 95
+				-- h = 14/95 * t + 1496/95
+				-- where 14/95 is gradient and 1496/95 is y intersection
+				-- h - 14/95 t = 1496/95 y intersection
+				-- so area above line is
+				-- h - 14/95 t > 1496/95
+				local freeze = nval_temp < 35
+				local precip = nval_prec < (nval_humid - 50) / 50 + PRECOFF and
+					nval_humid - grad * nval_temp > yint
+
+				if snow.debug then
+					precip = true
+				end
+
+				-- Check if player is outside
+				local outside = minetest.get_node_light(ppos, 0.5) == 15
+
+				-- Occasionally reset player sky
+				if math.random() < 0.1 then
+					if precip then
+						-- Set overcast sky
+						local sval
+						local time = minetest.get_timeofday()
+						if time >= 0.5 then
+							time = 1 - time
+						end
+						-- Sky brightness transitions:
+						-- First transition (24000 -) 4500, (1 -) 0.1875
+						-- Last transition (24000 -) 5750, (1 -) 0.2396
+						if time <= 0.1875 then
+							sval = NISVAL
+						elseif time >= 0.2396 then
+							sval = DASVAL
+						else
+							sval = math.floor(NISVAL +
+								((time - 0.1875) / 0.0521) * difsval)
+						end
+						-- Set sky to overcast bluish-grey
+						player:set_sky({
+							base_color = {r = sval, g = sval, b = sval + 16, a = 255},
+							type = "plain",
+						})
+					else
+						-- Reset sky to normal
+						player:set_sky({type = "regular"})
+					end
+				end
+
+				if precip and outside then
+					-- Precipitation
+					if freeze then
+						-- Snowfall
+						local extime = math.min((pposy + 12 - YLIMIT) / 2, 9)
+
+						local x, y, z = pposx - 24 + math.random(0, 48), pposy + 12, pposz - 24 + math.random(0, 48)
+
+						if not snow.lighter_snowfall then
+							snow_fall({
+										x = x,
+										y = y,
+										z = z
+									}, true)
+						end
+
+						for _ = 1, FLAKES do
+
+							x, y, z = pposx - 24 + math.random(0, 48), pposy + 12, pposz - 24 + math.random(0, 48)
+
+							minetest.add_particle({
+								pos = {
+									x = x,
+									y = y,
+									z = z
+								},
+								velocity = {
+									x = (-20 + math.random(0, 40)) / 100,
+									y = -2.0,
+									z = (-20 + math.random(0, 40)) / 100
+								},
+								acceleration = {x = 0, y = 0, z = 0},
+								expirationtime = extime,
+								size = 2.8,
+								collisiondetection = COLLIDE,
+								collision_removal = true,
+								vertical = false,
+								texture = "snowdrift_snowflake" ..
+									math.random(1, 12) .. ".png",
+								playername = player_name
+							})
+						end
+					end
+				end
+			end
+		end
+	end)
+end

src/mapgen.lua

@@ -0,0 +1,222 @@
+--[[
+If you want to run PlantLife and mods that depend on it, i.e. MoreTrees, Disable the mapgen by
+commenting-out the lines starting with "local mgname = " through "end" (I left a note were to start
+and stop) Disabling "Snow's" mapgen allows MoreTrees and PlantLife to do their thing until the
+issue is figured out. However, the pine and xmas tree code is still needed for when those
+saplings grow into trees. --]]
+--The *starting* comment looks like this:  --[[
+--The *closing* comment looks like this:  --]]
+
+-- ~ LazyJ, 2014_05_13
+
+
+-- Part 1: To disable the mapgen, add the *starting* comment under this line.
+
+--[[local perlin_scale, nosmooth_rarity
+if not snow.disable_mapgen then
+	print("[snow] Mapgen enabled!")
+
+	snow.mapgen = snow.mapgen or {}
+	local mg = snow.mapgen
+
+	-- perlin noise "hills" are not peaks but looking like sinus curve
+	local function upper_rarity(rarity)
+		return math.sign(rarity)*math.sin(math.abs(rarity)*math.pi/2)
+	end
+
+	local rarity = snow.mapgen_rarity
+	local size = snow.mapgen_size
+	local smooth = snow.smooth_biomes
+
+	local function calc_values()
+		nosmooth_rarity = 1-rarity/50
+		perlin_scale = size*100/rarity
+		mg.perlin_scale = perlin_scale
+		if smooth then
+			local smooth_trans_size = 4 --snow.smooth_trans_size
+			mg.smooth_rarity_max = upper_rarity(nosmooth_rarity+smooth_trans_size*2/perlin_scale)
+			mg.smooth_rarity_min = upper_rarity(nosmooth_rarity-smooth_trans_size/perlin_scale)
+			mg.smooth_rarity_dif = mg.smooth_rarity_max-mg.smooth_rarity_min
+		end
+		nosmooth_rarity = upper_rarity(nosmooth_rarity)
+		mg.nosmooth_rarity = nosmooth_rarity
+	end
+	calc_values()
+
+	snow.register_on_configuring(function(name, v)
+		if name == "mapgen_rarity" then
+			rarity = v
+		elseif name == "mapgen_size" then
+			size = v
+		elseif name == "smooth_biomes" then
+			smooth = v
+		else
+			return
+		end
+		-- TODO: if e.g. size and rarity get changed at once, don't calculate the values more times
+		calc_values()
+	end)
+
+
+	--Identify the mapgen.
+	local mgname = minetest.get_mapgen_setting("mg_name")
+	if not mgname then
+		minetest.log("error", "[MOD] Snow Biomes: WARNING! mapgen could not be identifyed!")
+	end
+	local path = minetest.get_modpath("snow")
+	if mgname == "v6" then
+		--Load mapgen_v6 compatibility.
+		dofile(path.."/src/mapgen_v6.lua")
+	else]]--
+		--Load mapgen_v7 compatibility.
+dofile(minetest.get_modpath("snow").."/src/mapgen_v7.lua")
+--[[	end
+end
+
+-- To complete the commenting-out add the *closing* comment under this line.
+
+
+local pine_tree = {
+	axiom="TABff",
+	rules_a="[&T+f+ff+ff+ff+f]GA",
+	rules_b="[&T+f+Gf+Gf+Gf]GB",
+	trunk="default:pine_tree",
+	leaves="snow:needles",
+	angle=90,
+	iterations=1,
+	random_level=0,
+	trunk_type="single",
+	thin_branches=true,
+}
+
+
+
+local xmas_tree = {
+	axiom="TABff",
+	rules_a="[&T+f+ff+ff+ff+f]GA",
+	rules_b="[&T+f+Gf+Gf+Gf]GB",
+	trunk="default:pine_tree",
+	leaves="snow:needles_decorated",
+	angle=90,
+	iterations=1,
+	random_level=0,
+	trunk_type="single",
+	thin_branches=true,
+}
+
+
+
+--Makes pine tree
+function snow.make_pine(pos,snow,xmas)
+	local minetest = minetest
+	local function try_node(p, node)
+		local n = minetest.get_node(p).name
+		if n == "air"
+		or n == "ignore" then
+			minetest.add_node(p, node)
+		end
+	end
+	if xmas then
+		minetest.remove_node(pos)
+		minetest.spawn_tree(pos, xmas_tree)
+	else
+		minetest.spawn_tree(pos, pine_tree)
+	end
+	if snow then
+		local x,z = pos.x,pos.z
+		try_node({x=x+1,y=pos.y+3,z=z+1},{name="default:snow"})
+		try_node({x=x-1,y=pos.y+3,z=z-1},{name="default:snow"})
+		try_node({x=x-1,y=pos.y+3,z=z+1},{name="default:snow"})
+		try_node({x=x+1,y=pos.y+3,z=z-1},{name="default:snow"})
+
+		try_node({x=x+1,y=pos.y+5,z=z},{name="default:snow"})
+		try_node({x=x-1,y=pos.y+5,z=z},{name="default:snow"})
+		try_node({x=x,y=pos.y+5,z=z+1},{name="default:snow"})
+		try_node({x=x,y=pos.y+5,z=z-1},{name="default:snow"})
+	end
+	if xmas then
+		try_node({x=pos.x,y=pos.y+7,z=pos.z},{name="snow:star_lit"}) -- Added lit star. ~ LazyJ
+	elseif snow
+	and minetest.get_perlin(112,3, 0.5, perlin_scale):get2d({x=pos.x,y=pos.z}) > nosmooth_rarity then
+		try_node({x=pos.x,y=pos.y+7,z=pos.z},{name="default:snow"})
+	end
+end
+
+
+
+--Makes pine tree
+function snow.voxelmanip_pine(pos,a,data)
+	local c_snow = minetest.get_content_id("default:snow")
+	local c_pine_needles = minetest.get_content_id("snow:needles")
+	local c_pinetree = minetest.get_content_id("default:pinetree")
+
+	local perlin1 = minetest.get_perlin(112,3, 0.5, perlin_scale)
+	for off_z = -1,1 do
+		local z = pos.z + off_z
+		for off_x = -1,1 do
+			local x = pos.x + off_x
+
+			--Make tree.
+			for i = 1,2 do
+				data[a:index(x,pos.y+i,z)] = c_pine_needles
+				if x ~= 0
+				and z ~= 0
+				and perlin1:get2d({x=x,y=z}) > nosmooth_rarity then
+					local abovenode = a:index(x,pos.y+i+1,z)
+					data[abovenode] = c_snow
+				end
+			end
+		end
+	end
+	for i=3, 4 do
+		local x = pos.x
+		local y = pos.y+i
+		local z = pos.z
+		data[a:index(x+1,y,z)] = c_pine_needles
+		data[a:index(x-1,y,z)] = c_pine_needles
+		data[a:index(x,y,z+1)] = c_pine_needles
+		data[a:index(x,y,z-1)] = c_pine_needles
+		if perlin1:get2d({x=x+1,y=z}) > nosmooth_rarity then
+			data[a:index(x+1,y+1,z)] = c_snow
+		end
+		if perlin1:get2d({x=x+1,y=z}) > nosmooth_rarity then
+			data[a:index(x-1,y+1,z)] = c_snow
+		end
+		if perlin1:get2d({x=x,y=z+1}) > nosmooth_rarity then
+			data[a:index(x,y+1,z+1)] = c_snow
+		end
+		if perlin1:get2d({x=x,y=z-1}) > nosmooth_rarity then
+			data[a:index(x,y+1,z-1)] = c_snow
+		end
+	end
+	for i=0, 4 do
+		data[a:index(pos.x,pos.y+i,pos.z)] = c_pinetree
+	end
+	data[a:index(pos.x,pos.y+5,pos.z)] = c_pine_needles
+	data[a:index(pos.x,pos.y+6,pos.z)] = c_pine_needles
+	if perlin1:get2d({x=pos.x,y=pos.z}) > nosmooth_rarity then
+		data[a:index(pos.x,pos.y+7,pos.z)] = c_snow
+	end
+end
+]]--
+-- treecapitator support
+if minetest.global_exists("treecapitator") then
+	treecapitator.register_tree{
+		trees = {"default:pine_tree"},
+		leaves = {"snow:needles"},
+		range = 1,
+		range_up = 2,
+		range_down = 3,
+		stem_height_min = 1,
+	}
+
+	treecapitator.register_tree{
+		trees = {"default:pine_tree"},
+		leaves = {"snow:needles_decorated"},
+		fruits = {"snow:star_lit", "snow:star"},
+		range = 1,
+		range_up = 3,
+		range_down = 3,
+		stem_height_min = 1,
+	}
+end

src/mapgen_v6.lua

@@ -0,0 +1,585 @@
+-- https://github.com/paramat/meru/blob/master/init.lua#L52
+-- Parameters must match mgv6 biome noise
+
+local np_default = {
+	offset = 0,
+	scale = 1,
+	spread = {x=250, y=250, z=250},
+	seed = 9130,
+	octaves = 3,
+	persist = 0.5
+}
+
+
+-- 2D noise for coldness
+
+local mg = snow.mapgen
+local scale_coldness = mg.perlin_scale
+local np_cold = {
+	offset = 0,
+	scale = 1,
+	spread = {x=scale_coldness, y=scale_coldness, z=scale_coldness},
+	seed = 112,
+	octaves = 3,
+	persist = 0.5
+}
+
+
+-- 2D noise for icetype
+
+local np_ice = {
+	offset = 0,
+	scale = 1,
+	spread = {x=80, y=80, z=80},
+	seed = 322345,
+	octaves = 3,
+	persist = 0.5
+}
+
+
+local function do_ws_func(a, x)
+	local n = math.pi * x / 16000
+	local y = 0
+	for k = 1,1000 do
+		y = y + math.sin(k^a * n)/(k^a)
+	end
+	return 1000*y/math.pi
+end
+
+
+-- caching functions
+
+local ws_values = {}
+local function get_ws_value(a, x)
+	local v = ws_values[a]
+	if v then
+		v = v[x]
+		if v then
+			return v
+		end
+	else
+		ws_values[a] = {}
+		-- weak table, see https://www.lua.org/pil/17.1.html
+		setmetatable(ws_values[a], {__mode = "kv"})
+	end
+	v = do_ws_func(a, x)
+	ws_values[a][x] = v
+	return v
+end
+
+local plantlike_ids = {}
+setmetatable(plantlike_ids, {__mode = "kv"})
+local function is_plantlike(id)
+	if plantlike_ids[id] ~= nil then
+		return plantlike_ids[id]
+	end
+	local node = minetest.registered_nodes[minetest.get_name_from_content_id(id)]
+	if not node then
+		plantlike_ids[id] = false
+		return false
+	end
+	local drawtype = node.drawtype
+	if not drawtype
+	or drawtype ~= "plantlike" then
+		plantlike_ids[id] = false
+		return false
+	end
+	plantlike_ids[id] = true
+	return true
+end
+
+local snowable_ids = {}
+setmetatable(snowable_ids, {__mode = "kv"})
+local function is_snowable(id)
+	if snowable_ids[id] ~= nil then
+		return snowable_ids[id]
+	end
+	local node = minetest.registered_nodes[minetest.get_name_from_content_id(id)]
+	if not node then
+		snowable_ids[id] = false
+		return false
+	end
+	local drawtype = node.drawtype
+	if drawtype
+	and drawtype ~= "normal"
+	and drawtype ~= "allfaces_optional"
+	and drawtype ~= "glasslike" then
+		snowable_ids[id] = false
+		return false
+	end
+	snowable_ids[id] = true
+	return true
+end
+
+
+local c, replacements, mg_debug, biome_to_string
+local function define_contents()
+	c = {
+		dirt_with_grass = minetest.get_content_id("default:dirt_with_grass"),
+		dirt = minetest.get_content_id("default:dirt"),
+		tree = minetest.get_content_id("default:tree"),
+		apple = minetest.get_content_id("default:apple"),
+		snow = minetest.get_content_id("default:snow"),
+		snow_block = minetest.get_content_id("default:snowblock"),
+		dirt_with_snow = minetest.get_content_id("default:dirt_with_snow"),
+		air = minetest.get_content_id("air"),
+		ignore = minetest.get_content_id("ignore"),
+		stone = minetest.get_content_id("default:stone"),
+		dry_shrub = minetest.get_content_id("default:dry_shrub"),
+		snow_shrub = minetest.get_content_id("snow:shrub_covered"),
+		leaves = minetest.get_content_id("default:leaves"),
+		jungleleaves = minetest.get_content_id("default:jungleleaves"),
+		junglegrass = minetest.get_content_id("default:junglegrass"),
+		ice = minetest.get_content_id("default:ice"),
+		water = minetest.get_content_id("default:water_source"),
+		papyrus = minetest.get_content_id("default:papyrus"),
+		sand = minetest.get_content_id("default:sand"),
+		desert_sand = minetest.get_content_id("default:desert_sand"),
+	}
+	replacements = snow.known_plants or {}
+
+	mg_debug = snow.debug
+end
+
+local smooth = snow.smooth_biomes
+local smooth_rarity_max = mg.smooth_rarity_max or 0
+local smooth_rarity_min = mg.smooth_rarity_min or 0
+local smooth_rarity_dif = mg.smooth_rarity_dif or 0
+local nosmooth_rarity = mg.nosmooth_rarity or 0
+
+snow.register_on_configuring(function(name, v)
+	if name == "debug" then
+		mg_debug = v
+	elseif name == "mapgen_rarity"
+	or name == "mapgen_size"
+	or name == "smooth_biomes" then
+		minetest.after(0, function()
+			smooth = snow.smooth_biomes
+			smooth_rarity_max = mg.smooth_rarity_max
+			smooth_rarity_min = mg.smooth_rarity_min
+			smooth_rarity_dif = mg.smooth_rarity_dif
+			nosmooth_rarity = mg.nosmooth_rarity
+			local scale = mg.perlin_scale
+			np_cold = {
+				offset = 0,
+				scale = 1,
+				spread = {x=scale, y=scale, z=scale},
+				seed = 112,
+				octaves = 3,
+				persist = 0.5
+			}
+		end)
+	end
+end)
+
+local perlin_objs, perlins_chulen
+local function get_perlins(sidelen)
+	if perlins_chulen == sidelen then
+		return
+	end
+	perlins_chulen = sidelen
+	local chulens = {x=sidelen, y=sidelen}
+	perlin_objs = {
+		default = minetest.get_perlin_map(np_default, chulens),
+		cold = minetest.get_perlin_map(np_cold, chulens),
+		ice = minetest.get_perlin_map(np_ice, chulens),
+	}
+end
+
+local nbuf_default = {}
+local nbuf_cold = {}
+local nbuf_ice = {}
+minetest.register_on_generated(function(minp, maxp, seed)
+	local t1 = os.clock()
+
+	local x0 = minp.x
+	local z0 = minp.z
+	local x1 = maxp.x
+	local z1 = maxp.z
+
+	if not c then
+		define_contents()
+	end
+
+	local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
+	local area = VoxelArea:new{MinEdge=emin, MaxEdge=emax}
+	local data = vm:get_data()
+	local param2s = vm:get_param2_data()
+
+	local heightmap = minetest.get_mapgen_object("heightmap")
+
+	local snow_tab,num = {},1
+	local pines_tab,pnum = {},1
+
+	get_perlins(x1 - x0 + 1)
+	local nvals_default = perlin_objs.default:get2dMap_flat({x=x0+150, y=z0+50}, nbuf_default)
+	local nvals_cold, nvals_ice, ndia
+
+	-- Choose biomes
+	local pr = PseudoRandom(seed+57)
+	-- Land biomes
+	local biome = pr:next(1, 5)
+	local snowy = biome == 1 -- spawns snow
+	local alpine = biome == 3 -- rocky terrain
+	-- Misc biome settings
+	local icy = pr:next(1, 2) == 2   -- if enabled spawns ice in sand instead of snow blocks
+	local shrubs = pr:next(1,2) == 1 -- spawns dry shrubs in snow
+	local pines = pr:next(1,2) == 1 -- spawns pines
+	-- Reseed random
+	pr = PseudoRandom(seed+68)
+
+	local nodes_added
+
+	-- Loop through columns in chunk
+	local is_smooth = smooth and not snowy
+	local write_to_map = false
+	local ni = 1
+	for z = z0, z1 do
+	for x = x0, x1 do
+		local in_biome = false
+		local test
+		if nvals_default[ni] < 0.35 then
+			nvals_cold = nvals_cold or perlin_objs.cold:get2dMap_flat({x=x0, y=z0}, nbuf_cold)
+			test = math.min(nvals_cold[ni], 1)
+			if is_smooth then
+				if test >= smooth_rarity_max
+				or (
+					test > smooth_rarity_min
+					and pr:next(1, 1000) <= ((test-smooth_rarity_min)/smooth_rarity_dif)*1000
+				) then
+					in_biome = true
+				end
+			elseif test > nosmooth_rarity then
+				in_biome = true
+			end
+		end
+
+		if not in_biome then
+			if alpine
+			and test
+			and test > (is_smooth and smooth_rarity_min or nosmooth_rarity) then
+				-- remove trees near alpine
+				local ground_y
+				if data[area:index(x, maxp.y, z)] == c.air then
+					local ytop = math.min(heightmap[ni]+20, maxp.y)
+					local vi = area:index(x, ytop, z)
+					for y = ytop, math.max(minp.y, heightmap[ni]-5), -1 do
+						if data[vi] ~= c.air then
+							ground_y = y
+							break
+						end
+						vi = vi - area.ystride
+					end
+				end
+
+				if ground_y then
+					local vi = area:index(x, ground_y, z)
+					for _ = minp.y - 16, ground_y do
+						local id = data[vi]
+						if id == c.leaves
+						or id == c.jungleleaves
+						or id == c.tree
+						or id == c.apple then
+							data[vi] = c.air
+							nodes_added = true
+						else
+							break
+						end
+						vi = vi - area.ystride
+					end
+				end
+			end
+		else
+			if not nvals_ice then
+				nvals_ice = perlin_objs.ice:get2dMap_flat({x=x0, y=z0}, nbuf_ice)
+
+				nodes_added = true
+				write_to_map = true
+			end
+			local icetype = nvals_ice[ni]
+			local cool = icetype > 0 -- only spawns ice on edge of water
+			local icebergs = icetype > -0.2 and icetype <= 0
+			local icehole = icetype > -0.4 and icetype <= -0.2 -- icesheet with holes
+			local icesheet = icetype > -0.6 and icetype <= -0.4
+			local icecave = icetype <= -0.6
+
+
+			local ground_y
+			-- avoid generating underground
+			if data[area:index(x, maxp.y, z)] == c.air then
+				-- search for non air node from 20 m above ground down to 5 m below ground (confined by minp and maxp)
+				local ytop = math.min(heightmap[ni]+20, maxp.y)
+				local vi = area:index(x, ytop, z)
+				for y = ytop, math.max(minp.y, heightmap[ni]-5), -1 do
+					if data[vi] ~= c.air then
+						ground_y = y
+						break
+					end
+					vi = vi - area.ystride
+				end
+			end
+
+			if ground_y then
+				local node = area:index(x, ground_y, z)
+				local c_ground = data[node]
+
+				if c_ground == c.dirt_with_grass then
+					if alpine
+					and test > nosmooth_rarity then
+						snow_tab[num] = {ground_y, z, x, test}
+						num = num+1
+						-- generate stone ground
+						local vi = area:index(x, ground_y, z)
+						for _ = math.max(-6, minp.y-6), ground_y do
+							if data[vi] == c.stone then
+								break
+							end
+							data[vi] = c.stone
+							vi = vi - area.ystride
+						end
+					elseif pines
+					and pr:next(1,36) == 1 then
+						pines_tab[pnum] = {x=x, y=ground_y+1, z=z}
+						pnum = pnum+1
+					elseif shrubs
+					and pr:next(1,928) == 1 then
+						data[node] = c.dirt_with_snow
+						data[area:index(x, ground_y+1, z)] = c.dry_shrub
+					else
+						if snowy
+						or test > (is_smooth and smooth_rarity_max or
+								nosmooth_rarity) then
+							-- more, deeper snow
+							data[node] = c.snow_block
+						else
+							data[node] = c.dirt_with_snow
+						end
+						snow_tab[num] = {ground_y, z, x, test}
+						num = num+1
+					end
+				elseif c_ground == c.water then
+					if not icesheet
+					and not icecave
+					and not icehole then
+						local y = data[node - area.ystride]
+						local ice = y ~= c.water and y ~= c.ice
+
+						if not ice then
+							ndia = ndia or {
+								area.zstride - 1,
+								1,
+								-2*area.zstride - 2,
+								area.zstride,
+								1 - area.zstride,
+								0
+							}
+							local vi = node + 1
+							for n = 1,6 do
+								local i = data[vi]
+								if i ~= c.water
+								and i ~= c.ice
+								and i ~= c.air
+								and i ~= c.ignore then
+									ice = true
+									break
+								end
+								vi = vi + ndia[n]
+							end
+
+							if not ice
+							and (cool or icebergs)
+							and pr:next(1,4) == 1 then
+
+								local vi_ice = node + 1
+								for i = 1,6 do
+									if data[vi_ice] == c.ice then
+										ice = true
+										break
+									end
+									vi_ice = vi_ice + ndia[i]
+								end
+							end
+						end
+						if ice
+						or (icebergs and pr:next(1,6) == 1) then
+							data[node] = c.ice
+						end
+					else
+						if icesheet
+						or icecave
+						or (icehole and pr:next(1,10) > 1) then
+							data[node] = c.ice
+						end
+						if icecave then
+							local vi = area:index(x, ground_y-1, z)
+							for _ = math.max(minp.y-16, -33), ground_y-1 do
+								if data[vi] ~= c.water then
+									break
+								end
+								data[vi] = c.air
+								vi = vi - area.ystride
+							end
+						end
+						if icesheet then
+							-- put snow onto icesheets
+							snow_tab[num] = {ground_y, z, x, test}
+							num = num+1
+						end
+					end
+				elseif c_ground == c.sand then
+					if icy then
+						data[node] = c.ice
+					end
+					snow_tab[num] = {ground_y, z, x, test}
+					num = num+1
+				elseif c_ground == c.papyrus then
+					snow_tab[num] = {ground_y, z, x, test}
+					num = num+1
+					-- replace papyrus plants with snowblocks
+					local vi = area:index(x, ground_y, z)
+					for _ = 1,7 do
+						if data[vi] ~= c.papyrus then
+							break
+						end
+						data[vi] = c.snow_block
+						vi = vi - area.ystride
+					end
+				elseif alpine then
+					-- make stone pillars out of trees and other stuff
+					local vi = area:index(x, ground_y, z)
+					for _ = 0, ground_y - math.max(-6, minp.y-6) do
+						if data[vi] == c.stone then
+							break
+						end
+						data[vi] = c.stone
+						vi = vi - area.ystride
+					end
+					-- put snow onto it
+					snow_tab[num] = {ground_y, z, x, test}
+					num = num+1
+				elseif c_ground ~= c.desert_sand then
+					if is_snowable(c_ground) then
+						-- put snow onto it
+						snow_tab[num] = {ground_y, z, x, test}
+						num = num+1
+					end
+					local vi = area:index(x, ground_y, z)
+					for _ = 0, 12 do
+						local nd = data[vi]
+						local plantlike = is_plantlike(nd)
+						if replacements[nd] then
+							data[vi] = replacements[nd]
+							if plantlike then
+								param2s[vi] = pr:next(0,179)
+							end
+						elseif nd == c.dirt_with_grass then
+							data[vi] = c.dirt_with_snow
+							break
+						elseif plantlike then
+							local under = vi - area.ystride
+							if data[under] == c.dirt_with_grass then
+								-- replace other plants with shrubs
+								data[vi] = c.snow_shrub
+								param2s[vi] = pr:next(0,179)
+								data[under] = c.dirt_with_snow
+								break
+							end
+						elseif nd == c.stone then
+							break
+						end
+						vi = vi - area.ystride
+					end
+				end
+			end
+		end
+		ni = ni + 1
+	end
+	end
+
+	-- abort if mapgen doesn't change sth
+	if not nodes_added then
+		return
+	end
+
+	if num ~= 1 then
+		for i = 1, num-1 do
+			i = snow_tab[i]
+			-- set snow
+			data[area:index(i[3], i[1]+1, i[2])] = c.snow
+		end
+		for k = 1, num-1 do
+			local i = snow_tab[k]
+			local y,z,x,test = unpack(i)
+			test = (test-nosmooth_rarity)/(1-nosmooth_rarity) -- /(1-0.53)
+			if test > 0 then
+				local maxh = math.floor(test*10)%10+1
+				if maxh ~= 1 then
+					local h = math.floor(get_ws_value(2, x) + get_ws_value(5, z)*5)%10+1
+					if h ~= 1 then
+						-- search for nearby snow
+						y = y+1
+						for off = -1,1,2 do
+							for _,cord in pairs({{x+off,z}, {x,z+off}}) do
+								local nd = data[area:index(cord[1], y, cord[2])]
+								if nd == c.air
+								or is_plantlike(nd) then
+									h = h/2
+								end
+							end
+						end
+						h = math.floor(h+0.5)
+						if h > 1 then
+							-- make snowdrifts walkable
+							if h == 10 then
+								h = 5
+							end
+							h = math.min(maxh, h)
+							local vi = area:index(x, y, z)
+							if h == 9 then
+								-- replace the snow with a snowblock because its a full node
+								data[vi] = c.snow_block
+							else
+								-- set a specific snow height
+								param2s[vi] = h*7
+							end
+						end
+					end
+				end
+			end
+		end
+	end
+
+	-- spawn pines
+	if pines
+	and pnum ~= 1 then
+		local spawn_pine = snow.voxelmanip_pine
+		for i = 1, pnum-1 do
+			spawn_pine(pines_tab[i], area, data)
+		end
+	end
+
+	vm:set_data(data)
+	vm:set_param2_data(param2s)
+	vm:set_lighting({day=0, night=0})
+	vm:calc_lighting()
+	vm:write_to_map()
+
+	if write_to_map
+	and mg_debug then -- print if any column of mapchunk was snow biome
+		local biome_string = biome_to_string(biome)
+		local chugent = math.ceil((os.clock() - t1) * 1000)
+		print("[snow] "..biome_string.." x "..minp.x.." z "..minp.z.." time "..chugent.." ms")
+	end
+end)
+
+
+-- Debugging function
+
+local biome_strings = {
+	{"snowy", "plain", "alpine", "normal", "normal"},
+	{"cool", "icebergs", "icesheet", "icecave", "icehole"}
+}
+function biome_to_string(num)
+	local biome = biome_strings[1][num] or "unknown "..num
+	return biome
+end

src/mapgen_v7.lua

@@ -0,0 +1,237 @@
+--[[minetest.register_biome({
+	name           = "snow_biome_default",
+	node_dust = "default:snow",
+	node_top       = "default:dirt_with_snow",
+	depth_top      = 1,
+	node_filler    = "default:dirt",
+	depth_filler   = 1,
+	node_riverbed = "default:sand",
+	depth_riverbed = 2,
+	y_min     = 5,
+	y_max     = 31000,
+	heat_point     = 10.0,
+	humidity_point = 40.0,
+})
+]]--
+minetest.register_biome({
+	name           = "snow_biome_forest",
+	node_dust = "default:snow",
+	node_top       = "default:dirt_with_snow",
+	depth_top      = 1,
+	node_filler    = "default:dirt",
+	depth_filler   = 2,
+	node_riverbed = "default:sand",
+	depth_riverbed = 2,
+	y_min     = 2,
+	y_max     = 31000,
+	heat_point     = 20.0,
+	humidity_point = 70.0,
+})
+
+minetest.register_biome({
+	name = "pine_forest",
+	node_top = "default:dirt_with_grass",
+	depth_top = 1,
+	node_filler = "default:dirt",
+	depth_filler = 3,
+	node_riverbed = "default:sand",
+	depth_riverbed = 2,
+	y_min = 60,
+	y_max = 31000,
+	heat_point = 40,
+	humidity_point = 68,
+})
+
+minetest.register_biome({
+	name           = "snow_biome_lush",
+	node_dust = "default:snow",
+	node_top       = "default:dirt_with_snow",
+	depth_top      = 1,
+	node_filler    = "default:dirt",
+	depth_filler   = 2,
+	node_riverbed = "default:sand",
+	depth_riverbed = 2,
+	y_min     = 2,
+	y_max     = 31000,
+	heat_point     = 10.0,
+	humidity_point = 70.0,
+})
+
+minetest.register_biome({
+	name           = "snow_biome_alpine",
+	node_dust = "default:snow",
+	node_top       = "default:dirt_with_snow",
+	depth_top      = 1,
+	node_filler    = "default:stone",
+	node_riverbed = "default:gravel",
+	depth_riverbed = 2,
+	y_min     = 60,
+	y_max     = 31000,
+	heat_point     = 10.0,
+	humidity_point = 40.0,
+})
+
+--[[minetest.register_biome({
+	name           = "snow_biome_sand",
+
+	node_top       = "default:sand",
+	depth_top      = 3,
+	node_filler    = "default:stone",
+	depth_filler   = 0,
+
+	y_min     = -2,
+	y_max     = 31000,
+	heat_point     = 10.0,
+	humidity_point = 40.0,
+})
+]]--
+
+--Pine tree.
+minetest.register_decoration({
+	deco_type = "schematic",
+	place_on = {"default:dirt_with_snow", "default:dirt_with_grass", "default:dirt_with_coniferous_litter"},
+	sidelen = 16,
+	noise_params = {
+		offset = -0.004,
+		scale = 0.01,
+		spread = {x = 100, y = 100, z = 100},
+		seed = 4087,
+		octaves = 3,
+		persist = 0.7,
+	},
+	y_max = 31000,
+	y_min = 4,
+	biomes = {"snowy_grassland", "coniferous_forest", "taiga", "snow_biome_alpine"},
+	schematic = minetest.get_modpath("snow").."/schematics/snow_pine.mts",
+	flags = "place_center_x, place_center_z",
+})
+
+minetest.register_decoration({
+	deco_type = "schematic",
+	place_on = {"default:dirt_with_snow", "default:dirt_with_grass"},
+	sidelen = 16,
+	noise_params = {
+		--offset = 0.036,
+		offset = 0.020,
+		scale = 0.002,
+		spread = {x = 250, y = 250, z = 250},
+		seed = 2861,
+		octaves = 3,
+		persist = 0.66
+	},
+--	fill_ratio = 0.0005,
+	y_max = 31000,
+	y_min = 4,
+	biomes = {"snow_biome_forest", "pine_forest"},
+	schematic = minetest.get_modpath("snow").."/schematics/snow_pine.mts",
+	flags = "place_center_x, place_center_z",
+})
+
+minetest.register_decoration({
+	deco_type = "schematic",
+	place_on = "default:dirt_with_snow",
+	sidelen = 16,
+	fill_ratio = 0.05,
+	y_max = 31000,
+	y_min = 4,
+	biomes = {"snow_biome_lush"},
+	schematic = minetest.get_modpath("snow").."/schematics/snow_pine.mts",
+	flags = "place_center_x, place_center_z",
+})
+
+--Dry shrubs.
+minetest.register_decoration({
+	deco_type = "simple",
+	place_on = "default:dirt_with_snow",
+	sidelen = 16,
+	fill_ratio = 0.001,
+	y_max = 31000,
+	y_min = 1,
+	biomes = {"snowy_grassland"},
+	decoration = "default:dry_shrub",
+})
+
+minetest.register_decoration({
+	deco_type = "simple",
+	place_on = "default:dirt_with_snow",
+	sidelen = 16,
+	fill_ratio = 0.01,
+	y_max = 31000,
+	y_min = 1,
+	biomes = {"snow_biome_forest", "snow_biome_lush"},
+	decoration = "default:dry_shrub",
+})
+
+--Snow shrubs.
+minetest.register_decoration({
+	deco_type = "simple",
+	place_on = "default:dirt_with_snow",
+	sidelen = 16,
+	fill_ratio = 0.005,
+	y_max = 31000,
+	y_min = 1,
+	biomes = {"snowy_grassland"},
+	decoration = "snow:shrub_covered",
+})
+
+minetest.register_decoration({
+	deco_type = "simple",
+	place_on = "default:dirt_with_snow",
+	sidelen = 16,
+	fill_ratio = 0.05,
+	y_max = 31000,
+	y_min = 1,
+	biomes = {"snow_biome_forest", "snow_biome_lush"},
+	decoration = "snow:shrub_covered",
+})
+
+-- Snow Flowers
+local function register_flower(seed, name)
+	minetest.register_decoration({
+		deco_type = "simple",
+		place_on = {"default:dirt_with_snow"},
+		sidelen = 16,
+		noise_params = {
+			offset = -0.015,
+			scale = 0.025,
+			spread = {x = 200, y = 200, z = 200},
+			seed = seed,
+			octaves = 3,
+			persist = 0.6
+		},
+		biomes = {"snow_biome_lush", "snow_biome_forest", "taiga", "snowy_grassland", "tundra"},
+		y_min = 1,
+		y_max = 31000,
+		decoration = "snow:flower_"..name,
+	})
+end
+
+register_flower(436,     "rose")
+register_flower(19822,   "tulip")
+register_flower(1220999, "dandelion_yellow")
+register_flower(36662,   "geranium")
+register_flower(1133,    "viola")
+register_flower(73133,   "dandelion_white")
+
+--Snow.
+--minetest.register_decoration({
+--	deco_type = "simple",
+--	place_on = "default:dirt_with_snow",
+--	sidelen = 16,
+--	fill_ratio = 10,
+--	y_max = 31000,
+--	y_min = 1,
+--	biomes = {"snow_biome_forest", "snow_biome_lush"},
+--	decoration = "default:snow",
+--})
+
+--minetest.register_decoration({
+--	deco_type = "simple",
+--	place_on = "default:stone",
+--	sidelen = 16,
+--	fill_ratio = 10,
+--	y_max = 31000,
+--	y_min = 1,
+--	biomes = {"snow_biome_alpine"},
+--	decoration = "default:snow",
+--})

src/nodes.lua

@@ -0,0 +1,566 @@
+-- NODES
+
+-- Grow sapling
+
+local function grow_pine_tree(pos)
+	local path = minetest.get_modpath("snow").."/schematics/snow_pine_from_sapling.mts"
+	minetest.place_schematic({x= pos.x -2, y = pos.y - 1, z = pos.z - 2}, path, "0", nil, false)
+end
+
+local function grow_snowy_pine_tree(pos)
+	local path = minetest.get_modpath("snow").."/schematics/snowy_snow_pine_from_sapling.mts"
+	minetest.place_schematic({x= pos.x -2, y = pos.y - 1, z = pos.z - 2}, path, "random", nil, false)
+end
+
+local function grow_xmas_tree(pos)
+	local path = minetest.get_modpath("snow").."/schematics/snow_xmas_from_sapling.mts"
+	minetest.place_schematic({x= pos.x -2, y = pos.y - 1, z = pos.z - 2}, path, "0", nil, false)
+end
+
+local function grow_snowy_xmas_tree(pos)
+	local path = minetest.get_modpath("snow").."/schematics/snowy_snow_xmas_from_sapling.mts"
+	minetest.place_schematic({x= pos.x -2, y = pos.y - 1, z = pos.z - 2}, path, "random", nil, false)
+end
+
+local function is_snow_nearby(pos)
+	return minetest.find_node_near(pos, 1, {"group:snowy"})
+end
+
+local function grow_sapling(pos)
+	if not default.can_grow(pos) then
+		-- try again 5 min later
+		minetest.get_node_timer(pos):start(300)
+		return
+	end
+
+	local node = minetest.get_node(pos)
+	if node.name == "snow:sapling_pine" then
+		minetest.log("action", "A Snow Pine sapling grows into a tree at "..minetest.pos_to_string(pos))
+		if is_snow_nearby(pos) then
+			grow_snowy_pine_tree(pos)
+		else
+			grow_pine_tree(pos)
+		end
+	elseif node.name == "snow:xmas_tree" then
+		minetest.log("action", "A Christmas sapling grows into a tree at "..minetest.pos_to_string(pos))
+		if is_snow_nearby(pos) then
+			grow_snowy_xmas_tree(pos)
+		else
+			grow_xmas_tree(pos)
+		end
+	end
+end
+
+minetest.register_lbm({
+	name = "snow:convert_saplings_to_node_timer",
+	nodenames = {"snow:sapling_pine", "snow:xmas_tree"},
+	action = function(pos)
+		minetest.get_node_timer(pos):start(math.random(300, 1500))
+	end
+})
+
+-- Pine Needles
+local nodedef = table.copy(minetest.registered_nodes["default:pine_needles"])
+nodedef.description = "Snow Pine Needles"
+nodedef.drop = {
+	max_items = 1,
+	items = {
+		{
+			-- player will get sapling with 1/20 chance
+			items = {'snow:sapling_pine'},
+			rarity = 20,
+		},
+		{
+			items = {'snow:needles'},
+		}
+	}
+}
+
+--[[
+If christmas_content is enabled, then this next part will override the pine needles' drop code
+(in the code section above) and adds Xmas tree saplings to the items that are dropped.
+The Xmas tree needles are registred and defined a farther down in this nodes.lua file.
+
+~ LazyJ
+]]--
+if snow.christmas_content then
+	table.insert(nodedef.drop.items, 1, {
+		-- player will get xmas tree with 1/120 chance
+		items = {"snow:xmas_tree"},
+		rarity = 120,
+	})
+end
+
+minetest.register_node("snow:needles", table.copy(nodedef))
+
+snow.register_on_configuring(function(name, v)
+	if name == "christmas_content" then
+		local drop = minetest.registered_nodes["snow:needles"].drop
+		if v then
+			table.insert(drop.items, 1, {
+				items = {"snow:xmas_tree"},
+				rarity = 120,
+			})
+		else
+			table.remove(drop.items, 1)
+		end
+		minetest.override_item("snow:needles", {drop = drop})
+	end
+end)
+
+
+
+-- Christmas egg
+if minetest.global_exists("skins") then
+	skins.add("character_snow_man")
+end
+
+
+-- Decorated Pine Leaves
+
+nodedef.description ="Decorated "..nodedef.description
+nodedef.light_source = 5
+nodedef.waving = nil
+if snow.disable_deco_needle_ani then
+	nodedef.tiles = {"snow_needles_decorated.png"}
+else
+	-- Animated, "blinking lights" version. ~ LazyJ
+	nodedef.inventory_image = minetest.inventorycube("snow_needles_decorated.png")
+	nodedef.tiles = {{
+		name="snow_needles_decorated_animated.png",
+		animation={type="vertical_frames", aspect_w=16, aspect_h=16,
+			length=20.0}
+	}}
+end
+nodedef.drop.items[#nodedef.drop.items] = {items = {'snow:needles_decorated'}}
+
+minetest.register_node("snow:needles_decorated", table.copy(nodedef))
+
+-- Leaf decay
+
+default.register_leafdecay{
+	trunks = {"default:pine_tree"},
+	leaves = {"snow:needles", "default:pine_needles", "snow:needles_decorated"},
+	radius = 2,
+}
+
+-- Saplings
+
+nodedef = table.copy(minetest.registered_nodes["default:pine_sapling"])
+nodedef.description = "Snow Pine Sapling"
+nodedef.tiles = {"snow_sapling_pine.png"}
+nodedef.inventory_image = "snow_sapling_pine.png"
+nodedef.wield_image = "snow_sapling_pine.png"
+nodedef.on_timer = grow_sapling
+nodedef.on_place = function(itemstack, placer, pointed_thing)
+	itemstack = default.sapling_on_place(
+		itemstack,
+		placer,
+		pointed_thing,
+		"snow:sapling_pine",
+		{x = -2, y = 1, z = -2},
+		{x = 2, y = 13, z = 2},
+		4)
+	return itemstack
+end
+
+-- Pine Sapling
+minetest.register_node("snow:sapling_pine", table.copy(nodedef))
+
+-- Xmas Tree Sapling
+nodedef.description = "Christmas Tree"
+nodedef.tiles = {"snow_xmas_tree.png"}
+nodedef.inventory_image = "snow_xmas_tree.png"
+nodedef.wield_image = "snow_xmas_tree.png"
+nodedef.on_place = function(itemstack, placer, pointed_thing)
+	itemstack = default.sapling_on_place(
+		itemstack,
+		placer,
+		pointed_thing,
+		"snow:xmas_tree",
+		{x= -2, y = 1, z = -2},
+		{x = 2, y = 14, z = 2},
+		4)
+	return itemstack
+end
+
+minetest.register_node("snow:xmas_tree", nodedef)
+
+-- Star
+nodedef = {
+	description = "Star",
+	drawtype = "plantlike",
+	tiles = {"snow_star.png"},
+	inventory_image = "snow_star.png",
+	wield_image = "snow_star.png",
+	paramtype = "light",
+	walkable = false,
+	-- Don't want the ornament breaking too easily because you have to punch it to turn it on and off. ~ LazyJ
+	groups = {cracky=1, crumbly=1, choppy=1, oddly_breakable_by_hand=1},
+	-- Breaking "glass" sound makes it sound like a real, broken, Xmas tree
+	-- ornament (Sorry, Mom!).  ;)-  ~ LazyJ
+	sounds = default.node_sound_glass_defaults(
+		{dig = {name="default_glass_footstep", gain=0.2}}),
+	-- Added a "lit" star that can be punched on or off depending on your
+	-- preference. ~ LazyJ
+	on_punch = function(pos, node)
+		node.name = "snow:star_lit"
+		minetest.set_node(pos, node)
+	end,
+}
+
+-- Star on Xmas Trees
+minetest.register_node("snow:star", table.copy(nodedef))
+
+-- Star (Lit Version) on Xmas Trees
+nodedef.description = nodedef.description.." Lighted"
+nodedef.light_source = minetest.LIGHT_MAX
+nodedef.tiles = {"snow_star_lit.png"}
+nodedef.drop = "snow:star"
+nodedef.groups.not_in_creative_inventory = 1
+nodedef.on_punch = function(pos, node)
+	node.name = "snow:star"
+	minetest.set_node(pos, node)
+end
+
+minetest.register_node("snow:star_lit", nodedef)
+
+
+
+-- Plants
+
+-- Moss
+minetest.register_node("snow:moss", {
+	description = "Moss",
+	inventory_image = "snow_moss.png",
+	tiles = {"snow_moss.png"},
+	drawtype = "signlike",
+	paramtype = "light",
+	paramtype2 = "wallmounted",
+	walkable = false,
+	selection_box = {
+		type = "wallmounted",
+	},
+	is_ground_content = true,
+	groups = {crumbly=3, attached_node=1},
+	furnace_burntime = 3,
+})
+
+-- Shrub(s)
+nodedef = {
+	description = "Snow Shrub",
+	tiles = {"snow_shrub.png"},
+	inventory_image = "snow_shrub.png",
+	wield_image = "snow_shrub.png",
+	drawtype = "plantlike",
+	paramtype = "light",
+	waving = 1,
+	sunlight_propagates = true,
+	walkable = false,
+	is_ground_content = true,
+	buildable_to = true,
+	groups = {snappy=3,flammable=3,attached_node=1},
+	sounds = default.node_sound_leaves_defaults(),
+	selection_box = {
+		type = "fixed",
+		fixed = {-0.3, -0.5, -0.3, 0.3, -5/16, 0.3},
+	},
+	furnace_burntime = 5,
+}
+minetest.register_node("snow:shrub", table.copy(nodedef))
+
+nodedef.tiles = {"snow_shrub.png^snow_shrub_covering.png"}
+nodedef.inventory_image = "snow_shrub.png^snow_shrub_covering.png"
+nodedef.wield_image = "snow_shrub.png^snow_shrub_covering.png"
+nodedef.paramtype2 = "degrotate"
+nodedef.drop = "snow:shrub"
+nodedef.furnace_burntime = 3
+minetest.register_node("snow:shrub_covered", nodedef)
+
+-- Flowers
+if rawget(_G, "flowers") then
+	-- broken flowers
+	snow.known_plants = {}
+	for _,name in pairs({"dandelion_yellow", "geranium", "rose", "tulip", "dandelion_white", "viola"}) do
+		local flowername = "flowers:"..name
+		local newname = "snow:flower_"..name
+		local flower = minetest.registered_nodes[flowername]
+		minetest.register_node(newname, {
+			drawtype = "plantlike",
+			tiles = { "snow_" .. name .. ".png" },
+			sunlight_propagates = true,
+			paramtype = "light",
+			paramtype2 = "degrotate",
+			walkable = false,
+			drop = "",
+			groups = {snappy=3, attached_node = 1},
+			sounds = default.node_sound_leaves_defaults(),
+			selection_box = flower.selection_box
+		})
+		snow.known_plants[minetest.get_content_id(flowername)] = minetest.get_content_id(newname)
+	end
+end
+
+-- Leaves
+--[[local leaves = minetest.registered_nodes["default:leaves"]
+nodedef = {
+	description = "Snow Leaves",
+	tiles = {"snow_leaves.png"},
+	waving = 1,
+	visual_scale = leaves.visual_scale,
+	drawtype = leaves.drawtype,
+	paramtype = leaves.paramtype,
+	groups = leaves.groups,
+	drop = leaves.drop,
+	sounds = leaves.sounds,
+}
+nodedef.groups.flammable = 1
+
+minetest.register_node("snow:leaves", nodedef)
+snow.known_plants[minetest.get_content_id("default:leaves")] = minetest.get_content_id("snow:leaves")
+
+local apple = minetest.registered_nodes["default:apple"]
+nodedef = {
+	description = "Snow Apple",
+	drawtype = "plantlike",
+	tiles = {"snow_apple.png"},
+	paramtype = "light",
+	paramtype2 = "degrotate",
+	walkable = false,
+	sunlight_propagates = apple.sunlight_propagates,
+	selection_box = apple.selection_box,
+	groups = apple.groups,
+	sounds = apple.sounds,
+	drop = apple.drop,
+}
+nodedef.groups.flammable = 1
+
+minetest.register_node("snow:apple", nodedef)
+snow.known_plants[minetest.get_content_id("default:apple")] = minetest.get_content_id("snow:apple")
+
+if not snow.disable_mapgen then
+	-- decay from default/nodes.lua:2537
+	default.register_leafdecay{
+		trunks = {"default:tree"},
+		leaves = {"snow:apple", "snow:leaves"},
+		radius = minetest.get_mapgen_setting("mg_name") == "v6" and 2 or 3,
+	}
+end
+]]--
+-- TODO
+snow.known_plants[minetest.get_content_id("default:jungleleaves")] = minetest.get_content_id("default:jungleleaves")
+
+
+
+local function snow_onto_dirt(pos)
+	pos.y = pos.y - 1
+	local node = minetest.get_node(pos)
+	if node.name == "default:dirt_with_grass"
+	or node.name == "default:dirt" then
+		minetest.set_node(pos, {name = "default:dirt_with_snow"})
+	end
+end
+
+
+
+-- Bricks
+
+nodedef = {
+	description = "Snow Brick",
+	tiles = {"snow_snow_brick.png"},
+	is_ground_content = true,
+	--freezemelt = "default:water_source", -- deprecated
+	liquidtype = "none",
+	paramtype = "light",
+	sunlight_propagates = true,
+	paramtype2 = "facedir", -- Allow blocks to be rotated with the screwdriver or
+	-- by player position. ~ LazyJ
+	 -- I made this a little harder to dig than snow blocks because
+	 -- I imagine snow brick as being much more dense and solid than fluffy snow. ~ LazyJ
+	groups = {cracky=2, crumbly=2, choppy=2, oddly_breakable_by_hand=2, melts=1, icemaker=1, cooks_into_ice=1, cools_lava = 1, snowy = 1},
+	 --Let's use the new snow sounds instead of the old grass sounds. ~ LazyJ
+	sounds = default.node_sound_snow_defaults(),
+	-- The "on_construct" part below, thinking in terms of layers,
+	-- dirt_with_snow could also double as dirt_with_frost which adds subtlety
+	-- to the winterscape. ~ LazyJ
+	on_construct = snow_onto_dirt
+}
+
+-- Snow Brick
+minetest.register_node("snow:snow_brick", table.copy(nodedef))
+
+-- hard Ice Brick, original texture from LazyJ
+local ibdef = table.copy(nodedef)
+ibdef.description = "Ice Brick"
+ibdef.tiles = {"snow_ice_brick.png"}
+ibdef.use_texture_alpha = "blend"
+ibdef.drawtype = "glasslike"
+ibdef.groups = {cracky=1, crumbly=1, choppy=1, melts=1, cools_lava = 1, slippery = 3}
+ibdef.sounds = default.node_sound_ice_defaults()
+
+minetest.register_node("snow:ice_brick", ibdef)
+
+
+-- Snow Cobble  ~ LazyJ
+-- Described as Icy Snow
+nodedef.description = "Icy Snow"
+nodedef.tiles = {"snow_snow_cobble.png"}
+
+minetest.register_node("snow:snow_cobble", nodedef)
+
+-- Override Default Nodes to Add Extra Functions
+
+local groups = minetest.registered_nodes["default:ice"].groups
+groups["melt"] = 1
+minetest.override_item("default:ice", {
+	drawtype = "glasslike",
+	use_texture_alpha = "blend",
+	param2 = 0,  --param2 is reserved for how much ice will freezeover.
+	sunlight_propagates = true,  -- necessary for dirt_with_grass/snow/just dirt ABMs
+	tiles = {"snow_ice.png^[brighten"},
+	liquidtype = "none",
+	groups = groups,
+	on_construct = snow_onto_dirt,
+	liquids_pointable = true,
+	--Make ice freeze over when placed by a maximum of 10 blocks.
+	after_place_node = function(pos)
+		minetest.set_node(pos, {name="default:ice", param2=math.random(0,10)})
+	end,
+})
+
+groups = minetest.registered_nodes["default:snowblock"].groups
+for g,v in pairs({melts=1, icemaker=1, cooks_into_ice=1, falling_node=1}) do
+	groups[g] = v
+end
+minetest.override_item("default:snowblock", {
+	liquidtype = "none",
+	paramtype = "light",
+	sunlight_propagates = true,
+	on_construct = snow_onto_dirt,
+	groups = groups,
+})
+
+minetest.override_item("default:snow", {
+	drop = {
+		max_items = 2,
+		items = {
+			{items = {'snow:moss'}, rarity = 20,},
+			{items = {'default:snow'},}
+		}
+	},
+	leveled = 7,
+	paramtype2 = "leveled",
+	node_box = {
+		type = "leveled",
+		fixed = {-0.5, -0.5, -0.5, 0.5, -0.5, 0.5},
+	},
+	collision_box = {
+		type = "leveled",
+		fixed = {-0.5, -0.5, -0.5, 0.5, -0.5, 0.5},
+	},
+	selection_box = {
+		type = "leveled",
+		fixed = {-0.5, -0.5, -0.5, 0.5, -0.5, 0.5},
+	},
+	groups = {cracky=3, crumbly=3, choppy=3, oddly_breakable_by_hand=3,
+		falling_node=1, melts=2, float=1},
+	sunlight_propagates = true,
+	walkable = true,
+	node_placement_prediction = "",
+	on_construct = function(pos)
+		pos.y = pos.y-1
+		local node = minetest.get_node(pos)
+		if node.name == "default:dirt_with_grass"
+		or node.name == "default:dirt" then
+			node.name = "default:dirt_with_snow"
+			minetest.set_node(pos, node)
+		end
+	end,
+	--Handle node drops due to node level.
+	on_dig = function(pos, node, digger)
+		local level = minetest.get_node_level(pos)
+		minetest.node_dig(pos, node, digger)
+		if minetest.get_node(pos).name ~= node.name then
+			local inv = digger:get_inventory()
+			if not inv then
+				return
+			end
+			local left = inv:add_item("main", "default:snow "..tostring(level/7-1))
+			if not left:is_empty() then
+				minetest.add_item({
+					x = pos.x + math.random()/2-0.25,
+					y = pos.y + math.random()/2-0.25,
+					z = pos.z + math.random()/2-0.25,
+				}, left)
+			end
+		end
+	end,
+	--Manage snow levels.
+	on_place = function(itemstack, player, pt)
+		local oldnode_under = minetest.get_node_or_nil(pt.under)
+		if not oldnode_under then
+			return itemstack, false
+		end
+
+		local olddef_under = minetest.registered_nodes[oldnode_under.name]
+		if not olddef_under then
+			return itemstack, false
+		end
+
+		-- If node under is buildable_to, place into it instead (eg. snow)
+		local pos, node
+		if olddef_under.buildable_to then
+			pos = pt.under
+			node = oldnode_under
+		else
+			pos = pt.above
+			node = minetest.get_node(pos)
+			local def = minetest.registered_nodes[node.name]
+			if not def
+			or not def.buildable_to then
+				return itemstack, false
+			end
+		end
+
+		-- nil player can place (for snowballs)
+		if player
+		and minetest.is_protected(pos, player:get_player_name()) then
+			return itemstack, false
+		end
+
+		if node.name ~= "default:snow" then
+			if minetest.get_node{x=pos.x, y=pos.y-1, z=pos.z}.name ==
+					"default:snow" then
+				-- grow the snow below (fixes levelled problem)
+				pos.y = pos.y - 1
+			else
+				-- place a snow
+				return minetest.item_place_node(itemstack, player, pt)
+			end
+		end
+
+		-- grow the snow
+		local level = minetest.get_node_level(pos)
+		level = level + 7
+		if level < 64 then
+			minetest.set_node_level(pos, level)
+		else
+			-- place a snowblock and snow onto it if possible
+			local p = {x=pos.x, y=pos.y+1, z=pos.z}
+			local def = minetest.registered_nodes[minetest.get_node(p).name]
+			if not def
+			or not def.buildable_to then
+				return itemstack, false
+			end
+
+			minetest.set_node(pos, {name="default:snowblock"})
+			minetest.set_node(p, {name="default:snow"})
+			level = math.max(level - 64, 7)
+			minetest.set_node_level(p, level)
+		end
+
+		itemstack:take_item()
+		return itemstack, true
+	end,
+	on_use = snow.shoot_snowball
+})

src/sled.lua

@@ -0,0 +1,249 @@
+--[[
+--=================
+--======================================
+LazyJ's Fork of Splizard's "Snow" Mod
+by LazyJ
+version: Umpteen and 7/5ths something or another.
+2014_04_12
+--======================================
+--=================
+
+
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+THE LIST OF CHANGES I'VE MADE
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+
+
+* The HUD message that displayed when a player sat on the sled would not go away after the player
+got off the sled. I spent hours on trial-and-error while reading the lua_api.txt and scrounging
+the Internet for a needle-in-the-haystack solution as to why the hud_remove wasn't working.
+Turns out Splizard's code was mostly correct, just not assembled in the right order.
+
+The key to the solution was found in the code of leetelate's scuba mod:
+http://forum.minetest.net/viewtopic.php?id=7175
+
+* Changed the wording of the HUD message for clarity.
+
+
+~~~~~~
+TODO
+~~~~~~
+
+* Figure out why the player avatars remain in a seated position, even after getting off the sled,
+if they flew while on the sled. 'default.player_set_animation', where is a better explanation
+for this and what are it's available options?
+
+* Go through, clean-up my notes and get them better sorted. Some are in the code, some are
+scattered in my note-taking program. This "Oh, I'll just make a little tweak here and a
+little tweak there" project has evolved into something much bigger and more complex
+than I originally planned. :p  ~ LazyJ
+
+* find out why the sled disappears after rightclicking it ~ HybridDog
+
+--]]
+
+
+
+--=============================================================
+-- CODE STUFF
+--=============================================================
+
+--
+-- Helper functions
+--
+
+local function table_find(t, v)
+	for i = 1,#t do
+		if t[i] == v then
+			return true
+		end
+	end
+	return false
+end
+
+local function is_water(pos)
+	return minetest.get_item_group(minetest.get_node(pos).name, "water") ~= 0
+end
+
+
+--
+-- Sled entity
+--
+
+local sled = {
+	physical = true,
+	collisionbox = {-0.6,-0.25,-0.6, 0.6,0.3,0.6},
+	visual = "mesh",
+	mesh = "sled.x",
+	textures = {"sled.png"},
+}
+
+local players_sled = {}
+local function join_sled(self, player)
+	local pos = self.object:getpos()
+	player:setpos(pos)
+	local name = player:get_player_name()
+	players_sled[name] = true
+	default.player_attached[name] = true
+	default.player_set_animation(player, "sit" , 30)
+	self.driver = name
+	self.object:set_attach(player, "", {x=0,y=-9,z=0}, {x=0,y=90,z=0})
+	self.object:setyaw(player:get_look_yaw())-- - math.pi/2)
+end
+
+local function leave_sled(self, player)
+	local name = player:get_player_name()
+	players_sled[name] = false
+	self.driver = nil
+	self.object:set_detach()
+	default.player_attached[name] = false
+	default.player_set_animation(player, "stand" , 30)
+
+	player:set_physics_override({
+		speed = 1,
+		jump = 1,
+	})
+	player:hud_remove(self.HUD) -- And here is part 2. ~ LazyJ
+	self.object:remove()
+
+	--Give the sled back again
+	player:get_inventory():add_item("main", "snow:sled")
+end
+
+local function sled_rightclick(self, player)
+	if self.driver then
+		return
+	end
+	join_sled(self, player)
+	player:set_physics_override({
+		speed = 2, -- multiplier to default value
+		jump = 0, -- multiplier to default value
+	})
+
+-- Here is part 1 of the fix. ~ LazyJ
+	self.HUD = player:hud_add({
+		hud_elem_type = "text",
+		position = {x=0.5, y=0.89},
+		name = "sled",
+		scale = {x=2, y=2},
+		text = "You are on the sled! Hold the sneak key to get off the sled.", -- LazyJ
+		direction = 0,
+	})
+-- End part 1
+end
+
+local on_sled_click
+if snow.sleds then
+	on_sled_click = sled_rightclick
+else
+	on_sled_click = function() end
+end
+
+snow.register_on_configuring(function(name, v)
+	if name == "sleds" then
+		if v then
+			on_sled_click = sled_rightclick
+		else
+			on_sled_click = function() end
+		end
+	end
+end)
+
+function sled:on_rightclick(player)
+	on_sled_click(self, player)
+end
+
+function sled:on_activate(staticdata)
+	self.object:set_armor_groups({immortal=1})
+	self.object:setacceleration({x=0, y=-10, z=0})
+	if staticdata then
+		self.v = tonumber(staticdata)
+	end
+end
+
+function sled:get_staticdata()
+	return tostring(self.v)
+end
+
+function sled:on_punch(puncher)
+	self.object:remove()
+	if puncher
+	and puncher:is_player() then
+		puncher:get_inventory():add_item("main", "snow:sled")
+	end
+end
+
+local driveable_nodes = {"default:snow","default:snowblock","default:ice","default:dirt_with_snow", "group:icemaker"}
+local function accelerating_possible(pos)
+	if is_water(pos) then
+		return false
+	end
+	if table_find(driveable_nodes, minetest.get_node({x=pos.x, y=pos.y-1, z=pos.z}).name) then
+		return true
+	end
+	return false
+end
+
+local timer = 0
+function sled:on_step(dtime)
+	if not self.driver then
+		return
+	end
+	timer = timer+dtime
+	if timer < 1 then
+		return
+	end
+	timer = 0
+	local player = minetest.get_player_by_name(self.driver)
+	if not player then
+		return
+	end
+	if player:get_player_control().sneak
+	or not accelerating_possible(vector.round(self.object:getpos())) then
+		leave_sled(self, player)
+	end
+end
+
+minetest.register_entity("snow:sled", sled)
+
+
+minetest.register_craftitem("snow:sled", {
+	description = "Sled",
+	inventory_image = "snow_sled.png",
+	wield_image = "snow_sled.png",
+	wield_scale = {x=2, y=2, z=1},
+	liquids_pointable = true,
+	stack_max = 1,
+
+	on_use = function(itemstack, placer)
+		if players_sled[placer:get_player_name()] then
+			return
+		end
+		local pos = placer:getpos()
+		if accelerating_possible(vector.round(pos)) then
+			pos.y = pos.y+0.5
+
+			--Get on the sled and remove it from inventory.
+			minetest.add_entity(pos, "snow:sled"):right_click(placer)
+			itemstack:take_item(); return itemstack
+		end
+	end,
+})
+
+minetest.register_craft({
+	output = "snow:sled",
+	recipe = {
+		{"", "", ""},
+		{"group:stick", "", ""},
+		{"group:wood", "group:wood", "group:wood"},
+	},
+})
+minetest.register_craft({
+	output = "snow:sled",
+	recipe = {
+		{"", "", ""},
+		{"", "", "group:stick"},
+		{"group:wood", "group:wood", "group:wood"},
+	},
+})

src/snowball.lua

@@ -0,0 +1,337 @@
+--============
+--Snowballs
+--============
+
+-- Snowballs were destroying nodes if the snowballs landed just right.
+-- Quite a bit of trial-and-error learning here and it boiled down to a
+-- small handful of code lines making the difference. ~ LazyJ
+
+local creative_mode = minetest.settings:get_bool("creative_mode")
+
+
+local snowball_velocity, entity_attack_delay
+local function update_snowball_vel(v)
+	snowball_velocity = v
+	local walkspeed = tonumber(minetest.settings:get("movement_speed_walk")) or 4
+	entity_attack_delay = (walkspeed+1)/v
+end
+update_snowball_vel(snow.snowball_velocity)
+
+local snowball_gravity = snow.snowball_gravity
+snow.register_on_configuring(function(name, v)
+	if name == "snowball_velocity" then
+		update_snowball_vel(v)
+	elseif name == "snowball_gravity" then
+		snowball_gravity = v
+	end
+end)
+
+local function get_gravity()
+	local grav = tonumber(minetest.settings:get("movement_gravity")) or 9.81
+	return grav*snowball_gravity
+end
+
+local someone_throwing, just_activated
+
+--Shoot snowball
+function snow.shoot_snowball(item, player)
+	local addp = {y = 1.625} -- + (math.random()-0.5)/5}
+	local dir = player:get_look_dir()
+	local dif = 2*math.sqrt(dir.z*dir.z+dir.x*dir.x)
+	addp.x = dir.z/dif -- + (math.random()-0.5)/5
+	addp.z = -dir.x/dif -- + (math.random()-0.5)/5
+	local pos = vector.add(player:getpos(), addp)
+	local obj = minetest.add_entity(pos, "snow:snowball_entity")
+	obj:setvelocity(vector.multiply(dir, snowball_velocity))
+	obj:setacceleration({x=dir.x*-3, y=-get_gravity(), z=dir.z*-3})
+	obj:get_luaentity().thrower = player:get_player_name()
+	if creative_mode then
+		if not someone_throwing then
+			someone_throwing = true
+			just_activated = true
+		end
+		return
+	end
+	item:take_item()
+	return item
+end
+
+if creative_mode then
+	local function update_step()
+		local active
+		for _,player in pairs(minetest.get_connected_players()) do
+			if player:get_player_control().LMB then
+				local item = player:get_wielded_item()
+				local itemname = item:get_name()
+				if itemname == "default:snow" then
+					snow.shoot_snowball(nil, player)
+					active = true
+					break
+				end
+			end
+		end
+
+		-- disable the function if noone currently throws them
+		if not active then
+			someone_throwing = false
+		end
+	end
+
+	-- do automatic throwing using minetest.after
+	local function do_step()
+		local timer
+		-- only if one holds left click
+		if someone_throwing
+		and not just_activated then
+			update_step()
+			timer = 0.006
+		else
+			timer = 0.5
+			just_activated = false
+		end
+		minetest.after(timer, do_step)
+	end
+	minetest.after(3, do_step)
+end
+
+--The snowball Entity
+local snow_snowball_ENTITY = {
+	physical = false,
+	timer = 0,
+	collisionbox = {-5/16,-5/16,-5/16, 5/16,5/16,5/16},
+}
+
+function snow_snowball_ENTITY.on_activate(self)
+	self.object:set_properties({textures = {"default_snowball.png^[transform"..math.random(0,7)}})
+	self.object:setacceleration({x=0, y=-get_gravity(), z=0})
+	self.lastpos = self.object:getpos()
+	minetest.after(0.1, function(obj)
+		if not obj then
+			return
+		end
+		local vel = obj:getvelocity()
+		if vel
+		and vel.y ~= 0 then
+			return
+		end
+		minetest.after(0, function(object)
+			if not object then
+				return
+			end
+			local vel_obj = object:getvelocity()
+			if not vel_obj
+			or vel_obj.y == 0 then
+				object:remove()
+			end
+		end, obj)
+	end, self.object)
+end
+
+--Snowball_entity.on_step()--> called when snowball is moving.
+function snow_snowball_ENTITY.on_step(self, dtime)
+	self.timer = self.timer + dtime
+	if self.timer > 10 then
+		-- 10 seconds is too long for a snowball to fly somewhere
+		self.object:remove()
+		return
+	end
+
+	if self.physical then
+		local vel = self.object:getvelocity()
+		local fell = vel.y == 0
+		if not fell then
+			if self.probably_stuck then
+				self.probably_stuck = nil
+			end
+			return
+		end
+		if self.probably_stuck
+		and vel.x == 0
+		and vel.z == 0 then
+			-- add a small velocity to move it from the corner
+			vel.x = math.random() - 0.5
+			vel.z = math.random() - 0.5
+			self.object:set_velocity(vel)
+			self.probably_stuck = nil
+			return
+		end
+		local pos = vector.round(self.object:getpos())
+		if minetest.get_node(pos).name == "air" then
+			pos.y = pos.y-1
+			if minetest.get_node(pos).name == "air" then
+				if vel.x == 0
+				and vel.z == 0 then
+					self.probably_stuck = true
+				end
+				return
+			end
+		end
+		snow.place(pos)
+		self.object:remove()
+		return
+	end
+
+	local pos = vector.round(self.object:getpos())
+	if vector.equals(pos, self.lastpos) then
+		return
+	end
+	if minetest.get_node(pos).name ~= "air" then
+		self.object:setacceleration({x=0, y=-get_gravity(), z=0})
+		--self.object:setvelocity({x=0, y=0, z=0})
+		pos = self.lastpos
+		self.object:setpos(pos)
+		minetest.sound_play("default_snow_footstep", {pos=pos, gain=vector.length(self.object:getvelocity())/30})
+		self.object:set_properties({physical = true})
+		self.physical = true
+		return
+	end
+	self.lastpos = vector.new(pos)
+
+	if self.timer < entity_attack_delay then
+		return
+	end
+	for _,v in pairs(minetest.get_objects_inside_radius(pos, 1.73)) do
+		local entity = v:get_luaentity()
+		if v ~= self.object
+		and entity then
+			local entity_name = entity.name
+			if v:is_player()
+			or (entity_name ~= "snow:snowball_entity"
+			and entity_name ~= "__builtin:item"
+			and entity_name ~= "gauges:hp_bar") then
+				local vvel = v:getvelocity() or v:get_player_velocity()
+				local veldif = self.object:getvelocity()
+				if vvel then
+					veldif = vector.subtract(veldif, vvel)
+				end
+				local gain = vector.length(veldif)/20
+				v:punch(
+					(self.thrower and minetest.get_player_by_name(self.thrower))
+						or self.object,
+					1,
+					{full_punch_interval=1, damage_groups = {fleshy=math.ceil(gain)}}
+				)
+				minetest.sound_play("default_snow_footstep", {pos=pos, gain=gain})
+
+				-- spawn_falling_node
+				local obj = minetest.add_entity(pos, "__builtin:falling_node")
+				if obj then
+					obj:get_luaentity():set_node{name = "default:snow"}
+				else
+					minetest.log("error", "Couldn't spawn falling node")
+				end
+
+				self.object:remove()
+				return
+			end
+		end
+	end
+end
+
+
+
+minetest.register_entity("snow:snowball_entity", snow_snowball_ENTITY)
+
+
+
+-- Snowball and Default Snowball Merged
+
+-- They both look the same, they do basically the same thing (except one is a leftclick throw
+-- and the other is a rightclick drop),... Why not combine snow:snowball with default:snow and
+-- benefit from both? ~ LazyJ, 2014_04_08
+
+--[[ Save this for reference and occasionally compare to the default code for any updates.
+
+minetest.register_node(":default:snow", {
+	description = "Snow",
+	tiles = {"default_snow.png"},
+	inventory_image = "default_snowball.png",
+	wield_image = "default_snowball.png",
+	is_ground_content = true,
+	paramtype = "light",
+	buildable_to = true,
+	leveled = 7,
+	drawtype = "nodebox",
+	freezemelt = "default:water_flowing",
+	node_box = {
+		type = "leveled",
+		fixed = {
+			{-0.5, -0.5, -0.5,  0.5, -0.5+2/16, 0.5},
+		},
+	},
+	groups = {crumbly=3,falling_node=1, melts=1, float=1},
+	sounds = default.node_sound_dirt_defaults({
+		footstep = {name="default_snow_footstep", gain=0.25},
+		dug = {name="default_snow_footstep", gain=0.75},
+	}),
+	on_construct = function(pos)
+		if minetest.get_node({x=pos.x, y=pos.y-1, z=pos.z}).name
+		== "default:dirt_with_grass"
+		or minetest.get_node({x=pos.x, y=pos.y-1, z=pos.z}).name == "default:dirt" then
+			minetest.set_node({x=pos.x, y=pos.y-1, z=pos.z}, {name="default:dirt_with_snow"})
+		end
+		-- Now, let's turn the snow pile into a snowblock. ~ LazyJ
+		if minetest.get_node({x=pos.x, y=pos.y-2, z=pos.z}).name == "default:snow"
+		and -- Minus 2 because at the end of this, the layer that triggers
+		--the change to a snowblock is the second layer more than a full block,
+		--starting into a second block (-2) ~ LazyJ, 2014_04_11
+			minetest.get_node({x=pos.x, y=pos.y, z=pos.z}).name == "default:snow" then
+			minetest.set_node({x=pos.x, y=pos.y-2, z=pos.z}, {name="default:snowblock"})
+		end
+	end,
+	on_use = snow_shoot_snowball  -- This line is from the 'Snow' mod, the reset is default Minetest.
+})
+--]]
+
+
+
+--[[
+A note about default torches, melting, and "buildable_to = true" in default snow.
+
+On servers where buckets are disabled, snow and ice stuff is used to set water for crops and
+water stuff like fountains, pools, ponds, ect.. It is a common practice to set a default torch on
+the snow placed where the players want water to be.
+
+If you place a default torch *on* default snow to melt it, instead of melting the snow is
+*replaced* by the torch. Using "buildable_to = false" would fix this but then the snow would no
+longer pile-up in layers; the snow would stack like thin shelves in a vertical column.
+
+I tinkered with the default torch's code (see below) to check for snow at the position and one
+node above (layered snow logs as the next y position above) but default snow's
+"buildable_to = true" always happened first. An interesting exercise to better learn how Minetest
+works, but otherwise not worth it. If you set a regular torch near snow, the snow will melt
+and disappear leaving you with nearly the same end result anyway. I say "nearly the same"
+because if you set a default torch on layered snow, the torch will replace the snow and be
+lit on the ground. If you were able to set a default torch *on* layered snow, the snow would
+melt and the torch would become a dropped item.
+
+~ LazyJ
+
+--]]
+
+
+-- Some of the ideas I tried. ~ LazyJ
+--[[
+local can_place_torch_on_top = function(pos)
+			if minetest.get_node({x=pos.x, y=pos.y, z=pos.z}).name == "default:snow"
+			or minetest.get_node({x=pos.x, y=pos.y+1, z=pos.z}).name == "default:snow" then
+				minetest.override_item("default:snow", {buildable_to = false,})
+			end
+		end
+--]]
+
+
+--[[
+minetest.override_item("default:torch", {
+	--on_construct = function(pos)
+	on_place = function(itemstack, placer, pointed_thing)
+		--if minetest.get_node({x=pos.x, y=pos.y, z=pos.z}).name == "default:snow"
+			-- Even though layered snow doesn't look like it's in the next position above (y+1)
+			-- it registers in that position. Check the terminal's output to see the coord change.
+		--or minetest.get_node({x=pos.x, y=pos.y+1, z=pos.z}).name == "default:snow"
+		if pointed_thing.name == "default:snow"
+		then minetest.set_node({x=pos.x, y=pos.y+1, z=pos.z}, {name="default:torch"})
+		end
+	end
+})
+--]]

src/stairs.lua

@@ -0,0 +1,101 @@
+local snow_nodes = {
+	snow    = { "ice_brick", "snow_brick", "snow_cobble" },
+	default = { "ice", "snowblock" }
+}
+
+if minetest.get_modpath("moreblocks") and
+	 minetest.global_exists("stairsplus") then
+
+	-- For users converting from MTG stairs to stairsplus, these nodes are aliased
+	-- from the stairs namespace to their source mod.
+	local was_in_stairs = {
+		ice_brick   = true,
+		snow_brick  = true,
+		snow_cobble = true,
+		ice = false,        -- moreblocks will take care of this one, and
+		snowblock = false,  -- this one, because they are in the default namespace.
+	}
+
+	-- Some nodes were incorrectly placed into the snow namespace.  Alias these to
+	-- their proper namespace (default).
+	local was_in_snow = {
+		ice_brick   = false,
+		snow_brick  = false,
+		snow_cobble = false,
+		ice = true,
+		snowblock = true,
+	}
+
+	-- Some nodes were incorrectly placed into the moreblocks namespace.  Alias
+	-- these to their proper namespace (either snow or default).
+	local was_in_moreblocks = {
+		ice_brick   = false,
+		snow_brick  = true,
+		snow_cobble = true,
+		ice = false,
+		snowblock = false,
+	}
+
+	for mod, nodes in pairs(snow_nodes) do
+		for _, name in pairs(nodes) do
+			local nodename = mod .. ":" .. name
+			local ndef = table.copy(minetest.registered_nodes[nodename])
+			ndef.sunlight_propagates = true
+			ndef.groups.melts = 2
+			ndef.groups.icemaker = nil
+			ndef.groups.cooks_into_ice = nil
+			ndef.after_place_node = nil
+			if string.find(name, "ice") then
+				ndef.use_texture_alpha = "blend"
+			else
+				ndef.use_texture_alpha = "opaque"
+			end
+			stairsplus:register_all(mod, name, nodename, ndef)
+
+			if was_in_stairs[name] then
+				minetest.register_alias("stairs:stair_" .. name, mod .. ":stair_" .. name)
+				minetest.register_alias("stairs:slab_"  .. name, mod .. ":slab_"  .. name)
+			end
+
+			if was_in_snow[name] then
+				minetest.register_alias("snow:stair_" .. name, mod .. ":stair_" .. name)
+				minetest.register_alias("snow:slab_"  .. name, mod .. ":slab_"  .. name)
+			end
+
+			if was_in_moreblocks[name] then
+				stairsplus:register_alias_all("moreblocks", name, mod, name)
+			end
+		end
+	end
+
+elseif minetest.global_exists("stairs") then -- simple stairs and slabs only
+	for mod, nodes in pairs(snow_nodes) do
+		for _, name in pairs(nodes) do
+			local nodename   = mod .. ":" .. name
+			local ndef = table.copy(minetest.registered_nodes[nodename])
+
+			local desc_stair = ndef.description .. " Stair"
+			local desc_slab  = ndef.description .. " Slab"
+			local images = ndef.tiles
+			local sounds = ndef.sounds
+
+			local groups = ndef.groups
+			groups.melts = 2
+			groups.icemaker = nil
+			groups.cooks_into_ice = nil
+
+			stairs.register_stair_and_slab(name, nodename,
+				groups, images, desc_stair, desc_slab, sounds)
+
+			-- Add transparency if used (e.g. ice and ice_brick).
+			minetest.override_item("stairs:stair_" .. name,
+				{use_texture_alpha = ndef.use_texture_alpha})
+			minetest.override_item("stairs:slab_"  .. name,
+				{use_texture_alpha = ndef.use_texture_alpha})
+
+			-- Alias all stairs and slabs from snow to the stairs namespace.
+			minetest.register_alias("snow:stair_" .. name, "stairs:stair_" .. name)
+			minetest.register_alias("snow:slab_"  .. name, "stairs:slab_"  .. name)
+		end
+	end
+end

src/util.lua

@@ -0,0 +1,55 @@
+--Global config and function table.
+snow = {
+	snowball_gravity = tonumber(minetest.settings:get("snow_snowball_gravity")) or 0.91,
+	snowball_velocity = tonumber(minetest.settings:get("snow_snowball_velocity")) or 19,
+	sleds = minetest.settings:get_bool("snow_sleds", true),
+	enable_snowfall = minetest.settings:get_bool("snow_enable_snowfall", false),
+	lighter_snowfall = minetest.settings:get_bool("snow_lighter_snowfall", false),
+	debug = minetest.settings:get_bool("snow_debug", false),
+	smooth_biomes = minetest.settings:get_bool("snow_smooth_biomes", true),
+	christmas_content = minetest.settings:get_bool("snow_christmas_content", true),
+	smooth_snow = minetest.settings:get_bool("snow_smooth_snow", true),
+	min_height = tonumber(minetest.settings:get("snow_min_height")) or 3,
+	mapgen_rarity = tonumber(minetest.settings:get("snow_mapgen_rarity")) or 18,
+	mapgen_size = tonumber(minetest.settings:get("snow_mapgen_size")) or 210,
+	disable_mapgen =  minetest.settings:get_bool("snow_disable_mapgen", false),
+}
+
+
+-- functions for dynamically changing settings
+
+snow.register_on_configuring = function() end
+--[[
+local on_configurings,n = {},1
+function snow.register_on_configuring(func)
+	on_configurings[n] = func
+	n = n+1
+end
+
+local function change_setting(name, value)
+	if snow[name] == value then
+		return
+	end
+	for i = 1,n-1 do
+		if on_configurings[i](name, value) == false then
+			return
+		end
+	end
+	snow[name] = value
+end
+
+
+local function value_from_string(v)
+	if v == "true" then
+		v = true
+	elseif v == "false" then
+		v = false
+	else
+		local a_number = tonumber(v)
+		if a_number then
+			v = a_number
+		end
+	end
+	return v
+end
+--]]