Version MFF.

Fixes Splizard/minetest-mod-snow#24

.gitignore

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

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 +1,67 @@
+CHANGELOG:
+------------
+
+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 +1,4 @@
 default
+flowers?
+moreblocks?
+watershed?

init.lua

@@ -1,4 +1,23 @@
 --[[
+--==============================
+--==========================================================
+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
@@ -17,574 +36,165 @@
    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)
-	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(),
-})
+-- 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")
 
---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(),
-})
+-- Original init.lua File Broken into Smaller Files
+local modpath = minetest.get_modpath("snow")
+dofile(modpath.."/src/abms.lua")
+dofile(modpath.."/src/aliases.lua")
+dofile(modpath.."/src/crafting.lua")
 
-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,
-})
+-- 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(modpath.."/src/util.lua")
+dofile(modpath.."/src/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(modpath.."/src/nodes.lua")
+dofile(modpath.."/src/basic_stairs_slabs.lua")
+-- dofile(modpath.."/src/mapgen.lua")
+dofile(modpath.."/src/sled.lua")
+-- dofile(modpath.."/src/falling_snow.lua")
 
 
 
---Snowballs
--------------
-snowball_GRAVITY=9
-snowball_VELOCITY=19
+-- Check for "MoreBlocks". If not found, skip this next "dofile".
+
+if rawget(_G, "stairsplus")
+and minetest.get_modpath("moreblocks") then
+
+	dofile(modpath.."/src/stairsplus.lua")
 
---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},
-}
+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)
+	if pos.y < -19000 then return end -- Don't put anything in the nether!
+	local node = minetest.get_node_or_nil(pos)
 
---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})
-			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})
-				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"})
-			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()
+	--Oops, maybe there is no node?
+	if not node
+	or not minetest.registered_nodes[node.name] then
 		return
 	end
-			minetest.env:place_node(self.lastpos,{name="snow:snow"})
-			self.object:remove()
-		end
 
-		if self.timer > 120 then
-			self.object:remove()
+	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
+				minetest.sound_play("default_snow_footstep", {pos=pos})
+				minetest.add_node_level(pos, 7)
 			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
+		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
+				minetest.sound_play("default_grass_footstep", {pos=pos})
+				minetest.place_node({x=pos.x, y=pos.y+1, z=pos.z}, {name="default:snow"})
+			else
+				minetest.sound_play("default_snow_footstep", {pos=pos})
+				minetest.add_node(pos, {name="default:snowblock"})
 			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
+	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 then
+				sound = sound.footstep
+				if sound then
+					minetest.sound_play(sound.name, {pos=pos, gain=sound.gain})
 				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)
+			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
-			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)

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
-)

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;,
+      -50.412270;53.554752;16.253036;,
+      -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;,
+      -1.000000;53.554752;16.253036;,
+      -1.000000;53.554752;14.242604;,
+       1.000000;53.554752;14.242604;,
+      -52.403629;-53.189678;16.253036;,
+      -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;,
+      -52.403629;-53.189678;16.253036;,
+      -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;,
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+        -0.000000; 0.000000; 1.000000;,
+        -0.000000; 0.000000; 1.000000;,
+        -0.000000;-1.000000; 0.000000;,
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+        -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;,
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+         0.000000; 1.000000; 0.000000;,
+         0.000000; 1.000000; 0.000000;,
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+        -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;,
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+         0.013346; 0.999965;,
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+         0.806422; 0.375920;,
+         0.794894; 0.375885;,
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+         0.680706; 0.387656;,
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+         0.794859; 0.387353;,
+         0.794894; 0.375885;,
+         0.806422; 0.375920;,
+         0.806387; 0.387388;,
+         0.306218; 0.386985;,
+         0.308096; 0.999061;,
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+         0.593305; 0.387924;,
+         0.591427; 1.000000;,
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+         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/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   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"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="16"
+   height="16"
+   id="svg2"
+   version="1.1"
+   inkscape:version="0.48.4 r9939"
+   sodipodi:docname="inkscape_default_ice.svg">
+  <defs
+     id="defs4" />
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="45.4375"
+     inkscape:cx="6.8335626"
+     inkscape:cy="8"
+     inkscape:document-units="px"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     inkscape:showpageshadow="false"
+     inkscape:window-width="1328"
+     inkscape:window-height="895"
+     inkscape:window-x="197"
+     inkscape:window-y="70"
+     inkscape:window-maximized="0" />
+  <metadata
+     id="metadata7">
+    <rdf:RDF>
+      <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>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(0,-1036.3622)">
+    <rect
+       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

@@ -5,17 +5,48 @@
   ____) | | | | (_) \ V  V /  | |  | | (_) | (_| |
  |_____/|_| |_|\___/ \_/\_/   |_|  |_|\___/ \__,_|
 				
-By Splizard, bob and cornernote.
+					Version 3.2
+				
+By Splizard and LazyJ.
+
+Minetest version:  0.4.9
+Depends: default
+License:  GPL v2
+
+Complimentary Mods: 
+---------------------
+*	"Snowdrift" by paramat
+*	"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)
+
+	* 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
+
+
 
 NOTICE
-While this mod is installed you may experience slow map loading while a snow biome is generated.
+While this mod is installed you may experience slower map loading while a snow biome is generated.
 
 USAGE:
 -------
@@ -32,58 +63,41 @@ There are nine biome types:
 * 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
+
+MAPGEN_V7:
+------------
+If you are using minetest 0.4.8 or the latest dev version of minetest you can choose to generate a v7 map.
+This option can be found when creating a new map from the menu.
+Snow Biomes has support for this though you might need a couple other biomes too otherwise you will only spawn snow.
+There are a couple of bugs and limitations with this such as no ice being generated at the moment.
+
+Config file:
+------------
+After starting a game in minetest with snow mod, a config file will be placed in this folder that contains the various options for snow mod.
+As admin you can use the /snow command in-game to make various changes.
+
 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

src/abms.lua

@@ -0,0 +1,225 @@
+--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,
+})
+
+
+
+-- 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, node)
+		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: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
+		nodeupdate(pos)
+	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, node)
+
+-- 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:pinetree"})
+			   -- 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, node)
+
+		-- '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 +1,106 @@
+-- Some aliases for compatibility switches and some to make "/give" commands
+-- a little easier
+
+minetest.register_alias("snow:needles", "default:pine_needles")
+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")
+minetest.register_alias("snow:leaves", "default:pine_needles")
+minetest.register_alias("snow:sapling_pine", "default:pine_sapling")
+
+-- 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")

src/basic_stairs_slabs.lua

@@ -0,0 +1,302 @@
+-- Based on
+-- Minetest 0.4 mod: stairs
+-- See README.txt for licensing and other information.
+
+
+-- ADD CHECK FOR MOREBLOCKS/SKIP IF NOT FOUND CODE STUFF HERE
+
+
+-- what of the recipeitem can be copied
+local recipe_values = {
+	"description", "tiles", "groups", "sounds", "use_texture_alpha", "sunlight_propagates",
+	"freezemelt", "liquidtype", "sunlight_propagates",
+	"stair_desc", "slab_desc"
+}
+
+local stairdef = {
+	drawtype = "nodebox",
+	paramtype = "light",
+	paramtype2 = "facedir",
+	is_ground_content = true,
+	sounds = default.node_sound_dirt_defaults({
+		footstep = {name="default_snow_footstep", gain=0.25},
+		dig = {name="default_dig_crumbly", gain=0.4},
+		dug = {name="default_snow_footstep", gain=0.75},
+		place = {name="default_place_node", gain=1.0}
+	}),
+	node_box = {
+		type = "fixed",
+		fixed = {
+			{-0.5, -0.5, -0.5, 0.5, 0, 0.5},
+			{-0.5, 0, 0, 0.5, 0.5, 0.5},
+		},
+	},
+	on_place = function(itemstack, placer, pointed_thing)
+		if pointed_thing.type ~= "node" then
+			return itemstack
+		end
+
+		local p0 = pointed_thing.under
+		local p1 = pointed_thing.above
+		local param2 = 0
+
+		local placer_pos = placer:getpos()
+		if placer_pos then
+			local dir = {
+				x = p1.x - placer_pos.x,
+				y = p1.y - placer_pos.y,
+				z = p1.z - placer_pos.z
+			}
+			param2 = minetest.dir_to_facedir(dir)
+		end
+
+		if p0.y-1 == p1.y then
+			param2 = param2 + 20
+			if param2 == 21 then
+				param2 = 23
+			elseif param2 == 23 then
+				param2 = 21
+			end
+		end
+
+		return minetest.item_place(itemstack, placer, pointed_thing, param2)
+	end,
+
+	on_construct = function(pos)
+		pos.y = pos.y - 1
+		local node = minetest.get_node(pos)
+		if node.name == "default:dirt_with_grass"
+			-- Thinking in terms of layers, dirt_with_snow could also double as
+			-- dirt_with_frost which adds subtlety to the winterscape. ~ LazyJ, 2014_04_04
+		or node.name == "default:dirt" then
+			node.name = "default:dirt_with_snow"
+			minetest.set_node(pos, node)
+		end
+	end
+}
+
+-- Node will be called snow:stair_<subname>
+local function register_stair(subname, recipeitem, newdef)
+	local def = table.copy(stairdef)
+
+
+	for n,i in pairs(newdef) do
+		def[n] = i
+	end
+
+	local name = "snow:stair_" .. subname
+	minetest.register_node(name, def)
+--[[
+	-- for replace ABM
+	minetest.register_node("snow:stair_" .. subname.."upside_down", {
+		replace_name = "snow:stair_" .. subname,
+		groups = {slabs_replace=1},
+	})
+--]]
+	minetest.register_craft({
+		output = name .. " 6",
+		recipe = {
+			{recipeitem, "", ""},
+			{recipeitem, recipeitem, ""},
+			{recipeitem, recipeitem, recipeitem},
+		},
+	})
+
+	-- Flipped recipe
+	minetest.register_craft({
+		output = name .. " 6",
+		recipe = {
+			{"", "", recipeitem},
+			{"", recipeitem, recipeitem},
+			{recipeitem, recipeitem, recipeitem},
+		},
+	})
+end
+
+
+local slabdef = table.copy(stairdef)
+slabdef.node_box = {
+	type = "fixed",
+	fixed = {-0.5, -0.5, -0.5, 0.5, 0, 0.5},
+}
+slabdef.on_place = nil
+
+-- Node will be called snow:slab_<subname>
+local function register_slab(subname, recipeitem, newdef)
+	local def = table.copy(slabdef)
+
+	local name = "snow:slab_" .. subname
+	def.on_place = function(itemstack, placer, pointed_thing)
+		if pointed_thing.type ~= "node" then
+			return itemstack
+		end
+
+		-- If it's being placed on an another similar one, replace it with
+		-- a full block
+		local slabpos, slabnode
+		local p0 = pointed_thing.under
+		local p1 = pointed_thing.above
+		local n0 = minetest.get_node(p0)
+		local n1 = minetest.get_node(p1)
+
+		local n0_is_upside_down = (n0.name == name and
+				n0.param2 >= 20)
+
+		if n0.name == name
+		and not n0_is_upside_down
+		and p0.y+1 == p1.y then
+			slabpos = p0
+			slabnode = n0
+		elseif n1.name == name then
+			slabpos = p1
+			slabnode = n1
+		end
+		if slabpos then
+			-- Remove the slab at slabpos
+			minetest.remove_node(slabpos)
+			-- Make a fake stack of a single item and try to place it
+			local fakestack = ItemStack(recipeitem)
+			fakestack:set_count(itemstack:get_count())
+
+			pointed_thing.above = slabpos
+			local success
+			fakestack, success = minetest.item_place(fakestack, placer, pointed_thing)
+			-- If the item was taken from the fake stack, decrement original
+			if success then
+				itemstack:set_count(fakestack:get_count())
+			-- Else put old node back
+			else
+				minetest.set_node(slabpos, slabnode)
+			end
+			return itemstack
+		end
+
+		local param2
+		-- Upside down slabs
+		if p0.y-1 == p1.y then
+			-- Turn into full block if pointing at a existing slab
+			if n0_is_upside_down  then
+				-- Remove the slab at the position of the slab
+				minetest.remove_node(p0)
+				-- Make a fake stack of a single item and try to place it
+				local fakestack = ItemStack(recipeitem)
+				fakestack:set_count(itemstack:get_count())
+
+				pointed_thing.above = p0
+				local success
+				fakestack, success = minetest.item_place(fakestack, placer, pointed_thing)
+				-- If the item was taken from the fake stack, decrement original
+				if success then
+					itemstack:set_count(fakestack:get_count())
+				-- Else put old node back
+				else
+					minetest.set_node(p0, n0)
+				end
+				return itemstack
+			end
+
+			-- Place upside down slab
+			param2 = 20
+		elseif n0_is_upside_down
+		and p0.y+1 ~= p1.y then
+			-- If pointing at the side of a upside down slab
+			param2 = 20
+		end
+
+		return minetest.item_place(itemstack, placer, pointed_thing, param2)
+	end
+
+	for n,i in pairs(newdef) do
+		def[n] = i
+	end
+
+	minetest.register_node(name, def)
+--[[
+	-- for replace ABM
+	minetest.register_node("snow:slab_" .. subname.."upside_down", {
+		replace_name = "snow:slab_"..subname,
+		groups = {slabs_replace=1},
+	})
+--]]
+
+	minetest.register_craft({
+		output = name .. " 6",
+		recipe = {
+			{recipeitem, recipeitem, recipeitem},
+		},
+	})
+
+
+
+
+end
+--[[
+-- Replace old "upside_down" nodes with new param2 versions
+minetest.register_abm({
+	nodenames = {"group:slabs_replace"},
+	interval = 1,
+	chance = 1,
+	action = function(pos, node)
+		node.name = minetest.registered_nodes[node.name].replace_name
+		node.param2 = node.param2 + 20
+		if node.param2 == 21 then
+			node.param2 = 23
+		elseif node.param2 == 23 then
+			node.param2 = 21
+		end
+		minetest.set_node(pos, node)
+	end,
+})
+--]]
+
+
+
+-- Snow stairs and slabs require extra definitions because of their extra
+-- features (freezing, melting, and how they change dirt and dirt_with_grass). ~ LazyJ
+
+-- Nodes will be called snow:{stair,slab}_<subname>
+local function register_stair_and_slab(subname, recipeitem, def)
+	local recipedef = minetest.registered_nodes[recipeitem]
+	for _,i in pairs(recipe_values) do
+		if def[i] == nil
+		and recipedef[i] ~= nil then
+			def[i] = recipedef[i]
+		end
+	end
+	local groups = table.copy(def.groups)
+	groups.cooks_into_ice = nil
+	if groups.melts then
+		groups.melts = math.min(groups.melts+1, 3)
+	end
+	def.groups = groups
+
+	local stair_desc = def.stair_desc
+	def.stair_desc = nil
+	local slab_desc = def.slab_desc
+	def.slab_desc = nil
+
+	def.description = stair_desc
+	register_stair(subname, recipeitem, def)
+
+	def.description = slab_desc
+	register_slab(subname, recipeitem, def)
+end
+
+
+list_of_snow_stuff = {
+	--{"row[1] = first item in row",
+	-- "row[2] = second item in row",
+	-- "row[3] = third item in row", and so on, and so on...}, ~ LazyJ
+	{"ice", "default:ice", "Ice Stairs", "Ice Slabs"},
+	{"snowblock", "default:snowblock", "Snowblock Stairs", "Snowblock Slabs"},
+	{"snow_cobble", "snow:snow_cobble", "Snow Cobble Stairs", "Snow Cobble Slabs"},
+	{"snow_brick", "snow:snow_brick", "Snow Brick Stair", "Snow Brick Slab"},
+	{"ice_brick", "snow:ice_brick", "Ice Brick Stair", "Ice Brick Slab"},
+}
+
+for _, row in pairs(list_of_snow_stuff) do
+	register_stair_and_slab(row[1], row[2], {
+		stair_desc = row[3],
+		slab_desc = row[4],
+	})
+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 +1,297 @@
+--[[
+--=================
+--======================================
+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
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+
+* Falling snow would destroy nodes it deposited snow on. I figured out that if
+I switched the 'snow.place' with 'minetest.place_node' and increased the
+y position by 2, then the nodes were nolonger destroyed and the snow
+would start to pile up.
+
+
+
+~~~~~~
+TODO
+~~~~~~
+
+* Add code to prevent snowfall from depositing snow on or
+near torches and lava.
+
+* Add code to prevent snowfall from depositing snow on
+'walkable = false' defined nodes.
+
+both are already fixed -- Hybrid Dog
+--]]
+
+
+
+--=============================================================
+-- CODE STUFF
+--=============================================================
+
+
+local weather_legacy
+
+local worldpath = minetest.get_worldpath()
+local read_weather_legacy = function ()
+	local file = io.open(worldpath.."/weather_v6", "r")
+	if not file then return end
+	local readweather = file:read()
+	file:close()
+	return readweather
+end
+
+--Weather for legacy versions of minetest.
+local save_weather_legacy = function ()
+	local file = io.open(worldpath.."/weather_v6", "w+")
+	file:write(weather_legacy)
+	file:close()
+end
+
+weather_legacy = read_weather_legacy() or ""
+
+local function leg_step()
+	if weather_legacy == "snow" then
+		if math.random(1000) == 1 then
+			weather_legacy = "none"
+			save_weather_legacy()
+		end
+	elseif math.random(5000) == 2 then
+		weather_legacy = "snow"
+		save_weather_legacy()
+	end
+	minetest.after(2, leg_step)
+end
+minetest.after(4, leg_step)
+
+local function infolog(msg)
+	minetest.log("info", "[snow] falling_snow: "..msg)
+end
+
+-- copied from meru mod
+local SEEDDIFF3 = 9130 -- 9130 -- Values should match minetest mapgen desert perlin.
+local OCTAVES3 = 3 -- 3
+local PERSISTENCE3 = 0.5 -- 0.5
+local SCALE3 = 250 -- 250
+
+-- cache perlin noise tests
+local perlin_scale, rarity
+local cold_perl_values = {}
+setmetatable(cold_perl_values, {__mode = "kv"})
+local function cold_perlin_test(x, y)
+	if not cold_perl_values[y] then
+		cold_perl_values[y] = {}
+		setmetatable(cold_perl_values[y], {__mode = "kv"})
+	end
+
+	local v = cold_perl_values[y][x]
+	if v ~= nil then
+		return v
+	end
+
+	if not rarity then
+		rarity = snow.mapgen.smooth_rarity_min
+		perlin_scale = snow.mapgen.perlin_scale
+	end
+
+	v = minetest.get_perlin(112,3, 0.5, perlin_scale):get2d({x=x, y=y}) >= rarity
+	cold_perl_values[y][x] = v
+	return v
+end
+
+-- disable falling snow in desert
+local desert_perl_values = {}
+setmetatable(desert_perl_values, {__mode = "kv"})
+local function is_desert(x, y)
+	if not desert_perl_values[y] then
+		desert_perl_values[y] = {}
+		setmetatable(desert_perl_values[y], {__mode = "kv"})
+	end
+
+	local v = desert_perl_values[y][x]
+	if v ~= nil then
+		return v
+	end
+
+	-- Offsets must match minetest mapgen desert perlin.
+	-- Smooth transition 0.35 to 0.45.
+	v = minetest.get_perlin(SEEDDIFF3, OCTAVES3, PERSISTENCE3, SCALE3):get2d({x=x+150,y=y+50}) <= 0.35
+	desert_perl_values[y][x] = v
+	return v
+end
+
+--Get snow at position.
+local function get_snow(pos)
+	return weather_legacy == "snow" --Legacy support.
+		and cold_perlin_test(pos.x, pos.z)
+		and not is_desert(pos.x, pos.z)
+end
+
+local addvectors = vector.add
+
+--Returns a random position between minp and maxp.
+-- TODO: make a fload random position
+local function randpos(minp, maxp)
+	local x,z
+	if minp.x > maxp.x then
+		x = math.random(maxp.x,minp.x)
+	else
+		x = math.random(minp.x,maxp.x)
+	end
+	if minp.z > maxp.z then
+		z = math.random(maxp.z,minp.z)
+	else
+		z = math.random(minp.z,maxp.z)
+	end
+	return {x=x,y=minp.y,z=z}
+end
+
+local default_snow_particle = {
+	amount = 3,
+	time = 0.5,
+	exptime = 5,
+	size = 50,
+	collisiondetection = false,
+	vertical = false,
+}
+
+local function get_snow_particledef(data)
+	for n,i in pairs(default_snow_particle) do
+		data[n] = data[n] or i
+	end
+	for _,i in pairs({"vel", "acc", "exptime", "size"}) do
+		data["min"..i] = data[i]
+		data["max"..i] = data[i]
+	end
+	data.texture = "weather_snow.png^[transform"..math.random(0,7)
+	return data
+end
+
+local function snow_fall(pos, player, animate)
+	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}
+
+  	if not get_snow(pos) then
+		return
+	end
+	if animate then
+		local spos = {x=pos.x, y=ground_y+10, z=pos.z}
+		minetest.add_particlespawner(get_snow_particledef({
+			minpos = addvectors(spos, {x=-9, y=3, z=-9}),
+			maxpos = addvectors(spos, {x= 9, y=5, z= 9}),
+			vel = {x=0, y=-1, z=-1},
+			acc = {x=0, y=0, z=0},
+			playername = player:get_player_name()
+		}))
+	end
+	snow.place(pos, true)
+	--minetest.place_node({x=pos.x, y=pos.y+2, z=pos.z}, {name="default:snow"}) -- LazyJ
+end
+
+-- Snow
+local lighter_snowfall = snow.lighter_snowfall
+local function calc_snowfall()
+	for _, player in pairs(minetest.get_connected_players()) do
+		local ppos = player:getpos()
+
+		-- Make sure player is not in a cave/house...
+		if get_snow(ppos)
+		and minetest.get_node_light(ppos, 0.5) == 15 then
+			local animate
+			if not lighter_snowfall then
+				local vel = {x=0, y=-1, z=-1}
+				local acc = {x=0, y=0, z=0}
+				minetest.add_particlespawner(get_snow_particledef({
+					amount = 5,
+					minpos = addvectors(ppos, {x=-9, y=3, z=-9}),
+					maxpos = addvectors(ppos, {x= 9, y=5, z= 9}),
+					vel = vel,
+					acc = acc,
+					size = 25,
+					playername = player:get_player_name()
+				}))
+
+				minetest.add_particlespawner(get_snow_particledef({
+					amount = 4,
+					minpos = addvectors(ppos, {x=-5, y=3.2, z=-5}),
+					maxpos = addvectors(ppos, {x= 5, y=1.6, z= 5}),
+					vel = vel,
+					acc = acc,
+					exptime = 4,
+					size = 25,
+					playername = player:get_player_name()
+				}))
+
+				animate = false
+			else
+				animate = true
+			end
+
+			if math.random(1,5) == 4 then
+				snow_fall(
+					randpos(
+						addvectors(ppos, {x=-20, y=0, z=-20}),
+						addvectors(ppos, {x= 20, y=0, z= 20})
+					),
+					player,
+					animate
+				)
+			end
+		end
+	end
+end
+
+local step_func
+minetest.register_globalstep(function()
+	step_func()
+end)
+
+if snow.enable_snowfall then
+	step_func = calc_snowfall
+	infolog("step function set to calc_snowfall")
+else
+	step_func = function() end
+	infolog("step function set to empty function")
+end
+
+snow.register_on_configuring(function(name, v)
+	if name == "enable_snowfall" then
+		if v then
+			step_func = calc_snowfall
+			infolog("step function set to calc_snowfall")
+		else
+			step_func = function() end
+			infolog("step function set to empty function")
+		end
+	elseif name == "lighter_snowfall" then
+		lighter_snowfall = v
+	end
+end)

src/mapgen.lua

@@ -0,0 +1,199 @@
+--[[
+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.
+
+
+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 nosmooth_rarity, perlin_scale
+local function calc_values()
+	nosmooth_rarity = 1-rarity/50
+	perlin_scale = size*100/rarity
+	mg.perlin_scale = perlin_scale
+	local smooth_rarity_max, smooth_rarity_min, smooth_rarity_dif
+	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 == "v7" then
+	--Load mapgen_v7 compatibility.
+	dofile(path.."/src/mapgen_v7.lua")
+else
+	--Load mapgen_v6 compatibility.
+	dofile(path.."/src/mapgen_v6.lua")
+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:pinetree",
+	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:pinetree",
+	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 try_node = function(pos, node)
+		local n = minetest.get_node(pos).name
+		if n == "air"
+		or n == "ignore" then
+			minetest.add_node(pos, 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 c_air = minetest.get_content_id("air")
+
+	local perlin1 = minetest.get_perlin(112,3, 0.5, perlin_scale)
+	for z = -1,1 do
+		local z = pos.z + z
+		for x = -1,1 do
+			local x = pos.x + 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

src/mapgen_v6.lua

@@ -0,0 +1,560 @@
+-- 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 = mg.perlin_scale
+local np_cold = {
+	offset = 0,
+	scale = 1,
+	spread = {x=scale, y=scale, z=scale},
+	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
+local smooth_rarity_min = mg.smooth_rarity_min
+local smooth_rarity_dif = mg.smooth_rarity_dif
+local nosmooth_rarity = mg.nosmooth_rarity
+
+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)
+
+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
+
+	local sidelen = x1 - x0 + 1
+	local chulens = {x=sidelen, y=sidelen, z=sidelen}
+	local nvals_default = minetest.get_perlin_map(np_default, chulens):get2dMap_flat{x=x0+150, y=z0+50}
+	local nvals_cold, nvals_ice
+
+	-- 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 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
+			if not nvals_cold then
+				nvals_cold = minetest.get_perlin_map(np_cold, chulens):get2dMap_flat{x=x0, y=z0}
+			end
+			test = math.min(nvals_cold[ni], 1)
+			if 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 > smooth_rarity_min then
+				-- remove trees near alpine
+				local ground_y
+				if data[area:index(x, maxp.y, z)] == c.air then
+					for y = math.min(heightmap[ni]+20, maxp.y), math.max(minp.y, heightmap[ni]-5), -1 do
+						if data[area:index(x, y, z)] ~= c.air then
+							ground_y = y
+							break
+						end
+					end
+				end
+
+				if ground_y then
+					local vi = area:index(x, ground_y, z)
+					if data[vi] == c.leaves
+					or data[vi] == c.jungleleaves then
+						nodes_added = true
+						for y = ground_y, -16, -1 do
+							local vi = area:index(x, y, z)
+							local id = data[vi]
+							if id ~= c.air then
+								if id == c.leaves
+								or id == c.jungleleaves
+								or id == c.tree
+								or id == c.apple then
+									data[vi] = c.air
+								else
+									break
+								end
+							end
+						end
+					end
+				end
+			end
+		else
+			nodes_added = true
+			write_to_map = true
+			if not nvals_ice then
+				nvals_ice = minetest.get_perlin_map(np_ice, chulens):get2dMap_flat{x=x0, y=z0}
+			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)
+				for y = math.min(heightmap[ni]+20, maxp.y), math.max(minp.y, heightmap[ni]-5), -1 do
+					if data[area:index(x, y, z)] ~= c.air then
+						ground_y = y
+						break
+					end
+				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
+						for y = ground_y, math.max(-6, minp.y-6), -1 do
+							local vi = area:index(x, y, z)
+							if data[vi] == c.stone then
+								break
+							end
+							data[vi] = c.stone
+						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 > smooth_rarity_max 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 nds = {
+							data[area:index(x+1, ground_y, z)],
+							data[area:index(x, ground_y, z+1)],
+							data[area:index(x+1, ground_y, z+1)],
+							data[area:index(x-1, ground_y, z-1)],
+							data[area:index(x-1, ground_y, z)],
+							data[area:index(x, ground_y, z-1)],
+						}
+						local ice
+						if pr:next(1,4) == 1
+						and (cool or icebergs) then
+							for _,i in ipairs(nds) do
+								if i == c.ice then
+									ice = true
+									break
+								end
+							end
+						end
+						if not ice then
+							for _,i in ipairs(nds) do
+								if i ~= c.water
+								and i ~= c.ice
+								and i ~= c.air
+								and i ~= c.ignore then
+									ice = true
+									break
+								end
+							end
+						end
+						local y = data[area:index(x, ground_y-1, z)]
+						if ice
+						or (y ~= c.water and y ~= c.ice) -- and y ~= "air") …I don't think y can be a string here ~HybridDog
+						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
+							for y = ground_y-1, -33, -1 do
+								local vi = area:index(x, y, z)
+								if data[vi] ~= c.water then
+									break
+								end
+								data[vi] = c.air
+							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 y = ground_y
+					for _ = 1,7 do
+						local vi = area:index(x, y, z)
+						if data[vi] == c.papyrus then
+							data[vi] = c.snow_block
+							y = y-1
+						else
+							break
+						end
+					end
+				elseif alpine then
+					-- make stone pillars out of trees and other stuff
+					for y = ground_y, math.max(-6, minp.y-6), -1 do
+						local stone = area:index(x, y, z)
+						if data[stone] == c.stone then
+							break
+						end
+						data[stone] = c.stone
+					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
+					for y = 0, 12 do
+						y = ground_y-y
+						local vi = area:index(x, y, z)
+						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 = area:index(x, y-1, z)
+							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
+					end
+				end
+			end
+		end
+		ni = ni + 1
+	end
+	end
+
+	-- abort if mapgen doesn't change sth
+	if not nodes_added then
+		return
+	end
+
+	-- try to fix oom memory crashes
+	minetest.after(0, collectgarbage)
+
+	if num ~= 1 then
+		for _,i in pairs(snow_tab) do
+			-- set snow
+			data[area:index(i[3], i[1]+1, i[2])] = c.snow
+		end
+		for _,i in pairs(snow_tab) do
+			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 i = -1,1,2 do
+							for _,cord in pairs({{x+i,z}, {x,z+i}}) 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 _,pos in pairs(pines_tab) do
+			spawn_pine(pos, 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,num2)
+	local biome = biome_strings[1][num] or "unknown "..num
+	return biome
+end

src/mapgen_v7.lua

@@ -0,0 +1,138 @@
+minetest.register_biome({
+	name           = "snow_biome_default",
+
+	node_top       = "default:dirt_with_snow",
+	depth_top      = 1,
+	node_filler    = "default:dirt",
+	depth_filler   = 2,
+
+	height_min     = snow.min_height,
+	height_max     = snow.min_height+60,
+	heat_point     = 10.0,
+	humidity_point = 40.0,
+})
+
+minetest.register_biome({
+	name           = "snow_biome_forest",
+
+	node_top       = "default:dirt_with_snow",
+	depth_top      = 1,
+	node_filler    = "default:dirt",
+	depth_filler   = 2,
+
+	height_min     = snow.min_height,
+	height_max     = snow.min_height+60,
+	heat_point     = 10.0,
+	humidity_point = 55.0,
+})
+
+minetest.register_biome({
+	name           = "snow_biome_lush",
+
+	node_top       = "default:dirt_with_snow",
+	depth_top      = 1,
+	node_filler    = "default:dirt",
+	depth_filler   = 2,
+
+	height_min     = snow.min_height,
+	height_max     = snow.min_height+60,
+	heat_point     = 10.0,
+	humidity_point = 70.0,
+})
+
+minetest.register_biome({
+	name           = "snow_biome_alpine",
+
+	node_top       = "default:stone",
+	depth_top      = 1,
+	node_filler    = "default:stone",
+
+	height_min     = snow.min_height+60,
+	height_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,
+
+	height_min     = -31000,
+	height_max     = 2,
+	heat_point     = 10.0,
+	humidity_point = 40.0,
+})
+
+
+--Pine tree.
+minetest.register_decoration({
+	deco_type = "schematic",
+	place_on = "default:dirt_with_snow",
+	sidelen = 16,
+	fill_ratio = 0.005,
+	biomes = {"snow_biome_default"},
+	schematic = minetest.get_modpath("snow").."/schematics/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,
+	biomes = {"snow_biome_forest"},
+	schematic = minetest.get_modpath("snow").."/schematics/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 = 0.1,
+	biomes = {"snow_biome_lush"},
+	schematic = minetest.get_modpath("snow").."/schematics/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 = 0.005,
+	biomes = {"snow_biome_default"},
+	decoration = "default:dry_shrub",
+})
+
+minetest.register_decoration({
+	deco_type = "simple",
+	place_on = "default:dirt_with_snow",
+	sidelen = 16,
+	fill_ratio = 0.05,
+	biomes = {"snow_biome_forest", "snow_biome_lush"},
+	decoration = "default:dry_shrub",
+})
+
+--Snow.
+minetest.register_decoration({
+	deco_type = "simple",
+	place_on = "default:dirt_with_snow",
+	sidelen = 16,
+	fill_ratio = 10,
+	biomes = {"snow_biome_default", "snow_biome_forest", "snow_biome_lush"},
+	decoration = "default:snow",
+})
+
+minetest.register_decoration({
+	deco_type = "simple",
+	place_on = "default:stone",
+	sidelen = 16,
+	fill_ratio = 10,
+	biomes = {"snow_biome_alpine"},
+	decoration = "default:snow",
+})

src/nodes.lua

@@ -0,0 +1,368 @@
+-- NODES
+
+-- Pine Needles
+local nodedef = {
+	description = "Pine Needles",
+	drawtype = "allfaces_optional",
+	visual_scale = 1.3,
+	tiles = {"snow_needles.png"},
+	waving = 1,
+	paramtype = "light",
+	groups = {snappy=3, leafdecay=5},
+	furnace_burntime = 1,
+	drop = {
+		max_items = 1,
+		items = {
+			{
+				items = {'snow:needles'},
+			}
+		}
+	},
+	sounds = default.node_sound_leaves_defaults(),
+}
+
+--[[
+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", nodedef)
+
+
+--[[ Saplings
+
+nodedef = {
+	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},
+	furnace_burntime = 10,
+	sounds = default.node_sound_defaults(),
+}
+
+-- 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"
+
+minetest.register_node("snow:xmas_tree", nodedef)
+]]
+
+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}}),
+	on_punch = function(pos, node) -- Added a "lit" star that can be punched on or off depending on your preference. ~ LazyJ
+		node.name = "snow:star_lit"
+		minetest.set_node(pos, node)
+		nodeupdate(pos)
+	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 = default.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)
+	nodeupdate(pos)
+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")
+
+-- 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
+		node.name = "default:dirt_with_snow"
+		minetest.set_node(pos, node)
+	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},
+	 --Let's use the new snow sounds instead of the old grass sounds. ~ LazyJ
+	sounds = default.node_sound_dirt_defaults({
+		footstep = {name="default_snow_footstep", gain=0.25},
+		dig = {name="default_dig_crumbly", gain=0.4},
+		dug = {name="default_snow_footstep", gain=0.75},
+		place = {name="default_place_node", gain=1.0}
+	}),
+ 	-- 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 = true
+ibdef.drawtype = "glasslike"
+ibdef.groups = {cracky=1, crumbly=1, choppy=1, melts=1}
+ibdef.sounds = default.node_sound_glass_defaults({
+	dug = {name="default_hard_footstep", gain=1}
+})
+
+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
+
+-- This adds code to the existing default ice. ~ LazyJ
+minetest.override_item("default:ice", {
+	-- The Lines: 1. Alpah to make semi-transparent ice, 2 to work with
+	-- the dirt_with_grass/snow/just dirt ABMs. ~ LazyJ, 2014_03_09
+	use_texture_alpha = true, -- 1
+	param2 = 0,
+	--param2 is reserved for how much ice will freezeover.
+	sunlight_propagates = true, -- 2
+	drawtype = "glasslike",
+	inventory_image  = minetest.inventorycube("default_ice.png").."^[brighten",
+	liquidtype = "none",
+	 -- I made this a lot harder to dig than snow blocks because ice is much more dense
+	 -- and solid than fluffy snow. ~ LazyJ
+	groups = {cracky=2, crumbly=1, choppy=1, --[[oddly_breakable_by_hand=1,]] melts=1},
+	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
+})
+
+
+
+-- This adds code to the existing, default snowblock. ~ LazyJ
+minetest.override_item("default:snowblock", {
+	liquidtype = "none", -- LazyJ to make dirt below change to dirt_with_snow (see default, nodes.lua, dirt ABM)
+	paramtype = "light",  -- LazyJ to make dirt below change to dirt_with_snow (see default, nodes.lua, dirt ABM)
+	sunlight_propagates = true, -- LazyJ to make dirt below change to dirt_with_snow (see default, nodes.lua, dirt ABM)
+	 -- Snow blocks should be easy to dig because they are just fluffy snow. ~ LazyJ
+	groups = {cracky=3, crumbly=3, choppy=3, oddly_breakable_by_hand=3, melts=1, icemaker=1, cooks_into_ice=1, falling_node=1},
+	--drop = "snow:snow_cobble",
+	on_construct = snow_onto_dirt
+		-- Thinking in terms of layers, dirt_with_snow could also double as
+		-- dirt_with_frost which adds subtlety to the winterscape. ~ LazyJ, 2014_04_04
+})

src/sled.lua

@@ -0,0 +1,251 @@
+--[[
+--=================
+--======================================
+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
+--
+
+vector.zero = vector.zero or {x=0, y=0, z=0}
+
+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! Press 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, dtime_s)
+	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 +1,394 @@
+--============
+--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.setting_getbool("creative_mode")
+
+
+local snowball_velocity, entity_attack_delay
+local function update_snowball_vel(v)
+	snowball_velocity = v
+	local walkspeed = tonumber(minetest.setting_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.setting_get("movement_gravity")) or 9.81
+	return grav*snowball_gravity
+end
+
+local someone_throwing, just_acitvated
+
+--Shoot snowball
+local 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_acitvated = 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_acitvated then
+			update_step()
+			timer = 0.006
+		else
+			timer = 0.5
+			just_acitvated = 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(obj)
+			if not obj then
+				return
+			end
+			local vel = obj:getvelocity()
+			if not vel
+			or vel.y == 0 then
+				obj: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 > 600 then
+		-- 10 minutes are too long for a snowball to fly somewhere
+		self.object:remove()
+		return
+	end
+
+	if self.physical then
+		local fell = self.object:getvelocity().y == 0
+		if not fell then
+			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
+				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
+		if v ~= self.object then
+			local entity_name = v:get_entity_name()
+			if 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(pos, {name = "default:snow"})
+				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.
+})
+--]]
+
+
+
+minetest.override_item("default:snow", {
+	drop = {
+		max_items = 2,
+		items = {
+			{items = {'snow:moss'}, rarity = 20,},
+			{items = {'default:snow'},}
+		}
+	},
+	leveled = 7,
+	node_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,
+	--Disable placement prediction for snow.
+ 	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, placer, pointed_thing)
+		local under = pointed_thing.under
+		local oldnode_under = minetest.get_node_or_nil(under)
+		local above = pointed_thing.above
+
+		if not oldnode_under
+		or not above then
+			return
+		end
+
+		local olddef_under = ItemStack({name=oldnode_under.name}):get_definition()
+		olddef_under = olddef_under or minetest.nodedef_default
+
+		local place_to
+		-- If node under is buildable_to, place into it instead (eg. snow)
+		if olddef_under.buildable_to then
+			place_to = under
+		else
+			-- Place above pointed node
+			place_to = above
+		end
+
+		local level = minetest.get_node_level(place_to)
+		if level == 63 then
+			minetest.set_node(place_to, {name="default:snowblock"})
+		else
+			minetest.set_node_level(place_to, level+7)
+		end
+
+		if minetest.get_node(place_to).name ~= "default:snow" then
+			local itemstack, placed = minetest.item_place_node(itemstack, placer, pointed_thing)
+			return itemstack, placed
+		end
+
+		itemstack:take_item()
+
+		return itemstack
+	end,
+	on_use = snow_shoot_snowball
+})
+
+
+
+--[[
+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/stairsplus.lua

@@ -0,0 +1,342 @@
+-- ===============================================================================
+-- StairsPlus Bonus!
+-- ===============================================================================
+--[[
+This section of code that makes blocks compatible with MoreBlocks' circular saw.
+I've added circular saw compatible code for default snowblocks and ice. :D
+A big thanks to Calinou and ShadowNinja for making this possible.
+
+Because StairsPlus creates partial blocks, it didn't seem quite right that the
+smallest microblocks would produce a full-sized water_source node when melted.
+So I toned them down a bit by changing their melt to a temporary,
+2-second water_source. See "melts" in abms.lua file for the various intensities.
+
+___...::: ATTENTION MINETEST SERVER OPERATORS :::...___
+You may or may not have noticed in your server logs that MoreBlocks stairs/slabs/
+panels/microblocks are not recorded as to when, who, what, and where. This is
+important information when trying to determine if a player who dug these blocks
+is the owner (the player who placed the block) or is a griefer stealing the block.
+
+There is an option that will log when these blocks are placed but it comes at the
+cost of losing the auto-rotation of those blocks when placed. They can still be
+rotated with a screwdriver but if screwdrivers are disabled on your server your
+players won't be able to position MoreBlocks, saw-made blocks.
+
+To enable logging the placement of these blocks, un-comment these lines:
+
+--on_place = minetest.item_place
+
+There is one in each of the "stairsplus.register_all" sections.
+
+~ LazyJ
+-- ===============================================================================
+--]]
+
+--snow_stairsplus = {}
+
+-- Check for infinite stacks
+
+--if minetest.get_modpath("unified_inventory") or not minetest.setting_getbool("creative_mode") then
+--	snow_stairsplus.expect_infinite_stacks = false
+--else
+--	snow_stairsplus.expect_infinite_stacks = true
+--end
+
+
+
+
+
+
+-- First, let's run a check to see if MoreBlocks is installed; we're going to need it for the
+-- next section of stairsplus stuff. ~LazyJ
+
+if (minetest.get_modpath("moreblocks"))
+and rawget(_G, "stairsplus")
+
+-- 'If' MoreBlocks was found and stairsplus is available, well, 'then' go ahead with this next part:
+
+then
+
+--[[  Leave commented out - For reference only. ~ LazyJ
+function stairsplus.register_all(modname, subname, recipeitem, fields)
+		--stairsplus.register_stair_slab_panel_micro(modname, subname, recipeitem, fields)
+		stairsplus:register_stair(modname, subname, recipeitem, fields)
+		stairsplus:register_slab(modname, subname, recipeitem, fields)
+		stairsplus:register_panel(modname, subname, recipeitem, fields)
+		stairsplus:register_micro(modname, subname, recipeitem, fields)
+end
+  Leave commented out
+--]]
+
+
+
+-- Leave commented out. Another, possible piece of the puzzle, as to why the placement of
+-- stairsplus nodes aren't recorded in the logs. Shelved till I can concentrate on it again.
+-- ~ LazyJ
+
+--ItemStack({name=nodename}):get_definition()
+--itemstack ={}
+--[[
+		local def = itemstack:get_definition()
+		function minetest.item_place_node(itemstack, placer, pointed_thing, param2)
+			minetest.log("action", placer:get_player_name() .. " places node "
+			.. def.name .. " at " .. minetest.pos_to_string(place_to))
+		end
+ Leave commented out
+--]]
+
+
+-- Leave commented out
+--[[   FIGURE OUT HOW TO GET THE SLABS TO SHOW UP IN THE LOG ON PLACEMENT
+
+
+			on_place = function(itemstack, placer, pointed_thing)
+						if pointed_thing.type ~= "node" then
+							return itemstack
+						end
+
+			-- If it's being placed on an another similar one, replace it with
+			-- a full block
+			local slabpos = nil
+			local slabnode = nil
+			local p0 = pointed_thing.under
+			local p1 = pointed_thing.above
+			local n0 = minetest.get_node(p0)
+			local n1 = minetest.get_node(p1)
+			local param2 = 0
+
+			local n0_is_upside_down = (n0.name == "snow:slab_" .. subname and
+					n0.param2 >= 20)
+
+			if n0.name == "snow:slab_" .. subname and not n0_is_upside_down and p0.y+1 == p1.y then
+				slabpos = p0
+				slabnode = n0
+			elseif n1.name == "snow:slab_" .. subname then
+				slabpos = p1
+				slabnode = n1
+			end
+			if slabpos then
+				-- Remove the slab at slabpos
+				minetest.remove_node(slabpos)
+				-- Make a fake stack of a single item and try to place it
+				local fakestack = ItemStack(recipeitem)
+				fakestack:set_count(itemstack:get_count())
+
+				pointed_thing.above = slabpos
+				local success
+				fakestack, success = minetest.item_place(fakestack, placer, pointed_thing)
+				-- If the item was taken from the fake stack, decrement original
+				if success then
+					itemstack:set_count(fakestack:get_count())
+				-- Else put old node back
+				else
+					minetest.set_node(slabpos, slabnode)
+				end
+				return itemstack
+			end
+
+			-- Upside down slabs
+			if p0.y-1 == p1.y then
+				-- Turn into full block if pointing at a existing slab
+				if n0_is_upside_down  then
+					-- Remove the slab at the position of the slab
+					minetest.remove_node(p0)
+					-- Make a fake stack of a single item and try to place it
+					local fakestack = ItemStack(recipeitem)
+					fakestack:set_count(itemstack:get_count())
+
+					pointed_thing.above = p0
+					local success
+					fakestack, success = minetest.item_place(fakestack, placer, pointed_thing)
+					-- If the item was taken from the fake stack, decrement original
+					if success then
+						itemstack:set_count(fakestack:get_count())
+					-- Else put old node back
+					else
+						minetest.set_node(p0, n0)
+					end
+					return itemstack
+				end
+
+				-- Place upside down slab
+				param2 = 20
+			end
+
+			-- If pointing at the side of a upside down slab
+			if n0_is_upside_down and p0.y+1 ~= p1.y then
+				param2 = 20
+			end
+
+			return minetest.item_place(itemstack, placer, pointed_thing, param2)
+		end
+ Leave commented out
+--]]
+
+
+
+--[[
+Below, in the "groups" line there is a "melts" category. Back in the ABMs lua file, melting
+code, melts=1 will produce a water_source when the full-sized snow/ice block is melted making
+a big, watery mess. melts=2 will produce a water_source only for a moment, then it changes back
+to water_flowing and then dries-up and disappears. I gave these stairs/slabs/panels/microblocks
+a melts value of 2 instead of 1 because they are not full blocks.
+
+~ LazyJ
+--]]
+
+-- Default snowblock and ice stairs/slabs/panels/microblocks.
+
+	local ndef = minetest.registered_nodes["default:ice"]
+	local groups = {}
+	for k, v in pairs(ndef.groups) do groups[k] = v end
+
+	stairsplus:register_all("moreblocks", "ice", "default:ice", {
+		description = ndef.description,
+		paramtype2 = "facedir",
+		-- Added "icemaker=1" in groups. This ties into the freezing
+		-- function in the ABMs.lua file. ~ LazyJ
+		groups = {cracky=1, crumbly=1, choppy=1, oddly_breakable_by_hand=1, melts=2, icemaker=1},
+		sounds = default.node_sound_glass_defaults(),
+		tiles = ndef.tiles,
+		-- Because of the "use_texture_alpha" line, that gives ice transparency, I couldn't combine
+		-- default ice and default snowblocks in a list like MoreBlocks does. ~ LazyJ
+		use_texture_alpha = true,
+		sunlight_propagates = true,
+		-- This "on_place" line makes placing these nodes recorded in the logs.
+		-- Useful for investigating griefings and determining ownership
+		-- BUT these nodes will nolonger auto-rotate into position. ~ LazyJ
+
+		--on_place = minetest.item_place,
+
+ 		-- 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 = function(pos)
+			pos.y = pos.y - 1
+			if minetest.get_node(pos).name == "default:dirt_with_grass"
+			or minetest.get_node(pos).name == "default:dirt" then
+				minetest.set_node(pos, {name="default:dirt_with_snow"})
+			end
+		end
+	})
+--end
+
+
+	local ndef = minetest.registered_nodes["default:snowblock"]
+	local groups = {}
+	for k, v in pairs(ndef.groups) do groups[k] = v end
+
+	stairsplus:register_all("moreblocks", "snowblock", "default:snowblock", {
+		description = ndef.description,
+		paramtype2 = "facedir",
+		-- Added "icemaker=1" in groups. This ties into the freezing function
+		-- in the ABMs.lua file. ~ LazyJ
+		groups = {cracky=3, crumbly=3, choppy=3, oddly_breakable_by_hand=3, melts=2, icemaker=1},
+		tiles = ndef.tiles,
+		sunlight_propagates = true,
+		sounds = default.node_sound_dirt_defaults({
+			footstep = {name="default_snow_footstep", gain=0.25},
+			dig = {name="default_dig_crumbly", gain=0.4},
+			dug = {name="default_snow_footstep", gain=0.75},
+			place = {name="default_place_node", gain=1.0}
+		}),
+		-- This "on_place" line makes placing these nodes recorded in the logs.
+		-- Useful for investigating griefings and determining ownership
+		-- BUT these nodes will nolonger auto-rotate into position. ~ LazyJ
+
+		--on_place = minetest.item_place,
+
+ 		-- 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 = function(pos)
+			pos.y = pos.y - 1
+			if minetest.get_node(pos).name == "default:dirt_with_grass"
+			or minetest.get_node(pos).name == "default:dirt" then
+				minetest.set_node(pos, {name="default:dirt_with_snow"})
+			end
+		end
+	})
+
+
+
+-- Snow stairs/slabs/panels/microblocks.
+
+local snow_nodes = {
+	"snow_brick",
+	"snow_cobble",
+}
+
+for _, name in pairs(snow_nodes) do
+	local nodename = "snow:"..name
+	local ndef = minetest.registered_nodes[nodename]
+	local groups = {}
+	for k, v in pairs(ndef.groups) do groups[k] = v end
+
+	stairsplus:register_all("moreblocks", name, nodename, {
+		description = ndef.description,
+		drop = ndef.drop,
+		groups = {cracky=2, crumbly=2, choppy=2, oddly_breakable_by_hand=2, melts=2, icemaker=1},
+		tiles = ndef.tiles,
+		--paramtype2 = "facedir",
+		sunlight_propagates = true,
+		sounds = default.node_sound_dirt_defaults({
+			footstep = {name="default_snow_footstep", gain=0.25},
+			dig = {name="default_dig_crumbly", gain=0.4},
+			dug = {name="default_snow_footstep", gain=0.75},
+			place = {name="default_place_node", gain=1.0}
+		}),
+		-- This "on_place" line makes placing these nodes recorded in the logs.
+		-- Useful for investigating griefings and determining ownership
+		-- BUT these nodes will nolonger auto-rotate into position. ~ LazyJ
+
+		--on_place = minetest.item_place,
+
+
+-- Some attempts to have both, the recording in the logs of the placing of
+-- the stairplus stuff *and* have the auto-rotation work. No luck yet.
+-- ~ LazyJ
+
+		--[[
+		on_place = function (i, p, t)
+			minetest.item_place(i, p, t, 0)
+			minetest.rotate_node(i, p, t)
+		end,
+		--]]
+		--[[
+		on_place = function (i, p, t)
+			minetest.rotate_node(i, p, t, 0)
+			minetest.item_place(i, p, t)
+		end,
+		--]]
+
+
+
+-- Picking up were we left off... ~ LazyJ
+
+ 		-- 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 = function(pos)
+			pos.y = pos.y - 1
+			if minetest.get_node(pos).name == "default:dirt_with_grass"
+				or minetest.get_node(pos).name == "default:dirt"
+				then minetest.set_node(pos, {name="default:dirt_with_snow"})
+			end
+			-- Some ideas I've tried. Leaving for future reference till I can figure out a workable solution. ~ LazyJ
+			--minetest.log("action", sender:get_player_name().." places" ..minetest.get_node(pos).name.. "at" ..minetest.pos_to_string(pos))
+			--minetest.log("action", minetest.get_player_name().." places" ..minetest.get_node(pos).name.. "at" ..minetest.pos_to_string(pos))
+			--minetest.log("action", "BINGO places "..minetest.get_name().." at "..minetest.pos_to_string(pos))
+			--minetest.log("action", minetest.get_player_name().." places "..minetest.get_name().." at "..minetest.pos_to_string(pos))
+			--minetest.log("action", placer:get_player_name().." places moreblocks-something at "..minetest.pos_to_string(pos))
+			--minetest.log("action", " BINGO places "..minetest.get_pointed_thing().." at "..minetest.pos_to_string(pos))
+			--minetest.log("action", "BINGO places moreblocks"..ndef.." at "..minetest.pos_to_string(pos))
+			--minetest.log("action", "A pine sapling grows into a Christmas tree at "..minetest.pos_to_string(pos))
+			--return minetest.item_place(itemstack, placer, pointed_thing, param2)
+			--return minetest.item_place(itemstack, pointed_thing, param2)
+		end,
+	})
+end
+
+else  -- from clear up at the top, the MoreBlocks check. "Else", if MoreBlocks wasn't found, skip
+		-- down to here, "return" nothing and "end" this script. ~ LazyJ
+return
+end

src/util.lua

@@ -0,0 +1,228 @@
+--Global config and function table.
+snow = {
+	snowball_gravity = 100/109,
+	snowball_velocity = 19,
+	sleds = true,
+	enable_snowfall = true,
+	lighter_snowfall = false,
+	debug = false,
+	smooth_biomes = true,
+	christmas_content = true,
+	smooth_snow = true,
+	min_height = 3,
+	mapgen_rarity = 18,
+	mapgen_size = 210,
+}
+
+--Config documentation.
+local doc = {
+	snowball_gravity = "The gravity of thrown snowballs",
+	snowball_velocity = "How fast players throw snowballs",
+	sleds = "Disable this to prevent sleds from being riden.",
+	enable_snowfall = "Enables falling snow.",
+	lighter_snowfall = "Reduces the amount of resources and fps used by snowfall.",
+	debug = "Enables debug output. Currently it only prints mgv6 info.",
+	smooth_biomes = "Enables smooth transition of biomes (mgv6)",
+	smooth_snow = "Disable this to stop snow from being smoothed.",
+	christmas_content = "Disable this to remove christmas saplings from being found.",
+	min_height = "The minumum height a snow biome will generate (mgv7)",
+	mapgen_rarity = "mapgen rarity in %",
+	mapgen_size = "size of the generated… (has an effect to the rarity, too)",
+}
+
+
+-- functions for dynamically changing settings
+
+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
+
+local allowed_types = {string = true, number = true, boolean = true}
+
+--Saves contents of config to file.
+local function saveConfig(path, config, doc)
+	local file = io.open(path,"w")
+	if not file then
+		minetest.log("error", "[snow] could not open config file for writing at "..path)
+		return
+	end
+	for i,v in pairs(config) do
+		if allowed_types[type(v)] then
+			if doc and doc[i] then
+				file:write("# "..doc[i].."\n")
+			end
+			file:write(i.." = "..tostring(v).."\n")
+		end
+	end
+	file:close()
+end
+
+local modpath = minetest.get_modpath("snow")
+
+minetest.register_on_shutdown(function()
+	saveConfig(modpath.."/config.txt", snow, doc)
+end)
+
+
+-- load settings from config.txt
+
+local config
+do
+	local path = modpath.."/config.txt"
+	local file = io.open(path,"r")
+	if not file then
+		--Create config file.
+		return
+	end
+	io.close(file)
+	config = {}
+	for line in io.lines(path) do
+		if line:sub(1,1) ~= "#" then
+			local i, v = line:match("^(%S*) = (%S*)")
+			if i and v then
+				config[i] = value_from_string(v)
+			end
+		end
+	end
+end
+
+if config then
+	for i,v in pairs(config) do
+		if type(snow[i]) == type(v) then
+			snow[i] = v
+		else
+			minetest.log("error", "[snow] wrong type of setting "..i)
+		end
+	end
+else
+	saveConfig(modpath.."/config.txt", snow, doc)
+end
+
+
+-- load settings from minetest.conf
+
+for i,v in pairs(snow) do
+	if allowed_types[type(v)] then
+		local v = minetest.setting_get("snow_"..i)
+		if v ~= nil then
+			snow[i] = value_from_string(v)
+		end
+	end
+end
+
+
+--MENU
+
+local function form_sort_func(a,b)
+	return a[1] < b[1]
+end
+
+--[[
+local function form_sort_func_bool(a,b)
+	if a[2] == b[2] then
+		return a[1] < b[1]
+	else
+		return b[2]
+	end
+end--]]
+
+local function get_formspec()
+	local ids,n1,n2 = {{},{}},1,1
+	for i,v in pairs(snow) do
+		local t = type(v)
+		if t == "string"
+		or t == "number" then
+			ids[2][n2] = {i,v}
+			n2 = n2+1
+		elseif t == "boolean" then
+			ids[1][n1] = {i,v}
+			n1 = n1+1
+		end
+	end
+	table.sort(ids[2], form_sort_func)
+	table.sort(ids[1], form_sort_func)
+
+	local p = -0.5
+	local formspec = "label[0,-0.3;Settings:]"
+	for n = 1,n1-1 do
+		local i,v = unpack(ids[1][n])
+		p = p + 0.5
+		formspec = formspec.."checkbox[0,"..p..";snow:"..i..";"..i..";"..tostring(v).."]"
+	end
+	for n = 1,n2-1 do
+		local i,v = unpack(ids[2][n])
+		p = p + 1.5
+		formspec = formspec.."field[0.3,"..p..";2,1;snow:"..i..";"..i..";"..v.."]"
+	end
+	p = p + 1
+	formspec = "size[4,"..p..";]\n"..formspec
+	return formspec
+end
+
+minetest.register_chatcommand("snow", {
+	description = "Show a menu for various actions",
+	privs = {server=true},
+	func = function(name)
+		minetest.chat_send_player(name, "Showing snow menu…")
+		minetest.show_formspec(name, "snow:menu", get_formspec())
+	end,
+})
+
+minetest.register_on_player_receive_fields(function(player, formname, fields)
+	if formname ~= "snow:menu" then
+		return
+	end
+	for i,v in pairs(snow) do
+		local t = type(v)
+		if allowed_types[t] then
+			local field = fields["snow:"..i]
+			if field then
+				if t == "number" then
+					field = tonumber(field)
+				elseif t == "boolean" then
+					if field == "true" then
+						field = true
+					elseif field == "false" then
+						field = false
+					else
+						field = nil
+					end
+				elseif t ~= "string" then
+					field = nil
+				end
+				if field ~= nil then
+					change_setting(i, field)
+				end
+			end
+		end
+	end
+end)