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README.md
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minetest-mod-snow
=================
Adds snow biomes to Minetest.

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config.lua Normal file
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--This file contains configuration options for snow mod.
--Enables experimental falling snow.
snow.enable_snowfall = true
--Enables debuging.
snow.debug = true

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depends.txt Normal file
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default

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init.lua Normal file
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--[[
Snow Biomes
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
MA 02110-1301, USA.
]]--
snow = {}
dofile(minetest.get_modpath("snow").."/mapgen.lua")
dofile(minetest.get_modpath("snow").."/config.lua")
function minetest.item_place_node(itemstack, placer, pointed_thing)
local item = itemstack:peek_item()
local def = itemstack:get_definition()
if def.type == "node" and pointed_thing.type == "node" then
local pos = pointed_thing.above
----------------
--Snow stuff
--Allows placing nodes "through" snow.
----------------
local node = pointed_thing.under
if minetest.env:get_node(node).name == "snow:snow" then
--Gets rid of client-side placement block
minetest.env:add_node(pos,{name="air"})
minetest.env:remove_node(node)
pos=node
end
----------------
local oldnode = minetest.env:get_node(pos)
local olddef = ItemStack({name=oldnode.name}):get_definition()
if not olddef.buildable_to then
minetest.log("info", placer:get_player_name() .. " tried to place"
.. " node in invalid position " .. minetest.pos_to_string(pos)
.. ", replacing " .. oldnode.name)
return
end
minetest.log("action", placer:get_player_name() .. " places node "
.. def.name .. " at " .. minetest.pos_to_string(pos))
local newnode = {name = def.name, param1 = 0, param2 = 0}
-- Calculate direction for wall mounted stuff like torches and signs
if def.paramtype2 == 'wallmounted' then
local under = pointed_thing.under
local above = pointed_thing.above
local dir = {x = under.x - above.x, y = under.y - above.y, z = under.z - above.z}
newnode.param2 = minetest.dir_to_wallmounted(dir)
-- Calculate the direction for furnaces and chests and stuff
elseif def.paramtype2 == 'facedir' then
local playerpos = placer:getpos() or {x=0,y=0,z=0}
local dir = {x = pos.x - playerpos.x, y = pos.y - playerpos.y, z = pos.z - playerpos.z}
newnode.param2 = minetest.dir_to_facedir(dir)
minetest.log("action", "facedir: " .. newnode.param2)
end
-- Add node and update
minetest.env:add_node(pos, newnode)
-- Run callback
if def.after_place_node then
def.after_place_node(pos, placer)
end
-- Run script hook (deprecated)
local _, callback
for _, callback in ipairs(minetest.registered_on_placenodes) do
callback(pos, newnode, placer)
end
itemstack:take_item()
end
return itemstack
end
--Replace leaves so snow gets removed on decay.
minetest.register_node(":default:leaves", {
description = "Leaves",
drawtype = "allfaces_optional",
visual_scale = 1.3,
tiles = {"default_leaves.png"},
paramtype = "light",
groups = {snappy=3, leafdecay=3, flammable=2},
drop = {
max_items = 1,
items = {
{
-- player will get sapling with 1/20 chance
items = {'default:sapling'},
rarity = 20,
},
{
-- player will get leaves only if he get no saplings,
-- this is because max_items is 1
items = {'default:leaves'},
}
}
},
--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(),
})
--Snowballs
-------------
snowball_GRAVITY=9
snowball_VELOCITY=19
--Shoot snowball.
local snow_shoot_snowball=function (item, player, pointed_thing)
local playerpos=player:getpos()
local obj=minetest.env:add_entity({x=playerpos.x,y=playerpos.y+1.5,z=playerpos.z}, "snow:snowball_entity")
local dir=player:get_look_dir()
obj:setvelocity({x=dir.x*snowball_VELOCITY, y=dir.y*snowball_VELOCITY, z=dir.z*snowball_VELOCITY})
obj:setacceleration({x=dir.x*-3, y=-snowball_GRAVITY, z=dir.z*-3})
item:take_item()
return item
end
--The snowball Entity
snow_snowball_ENTITY={
physical = false,
timer=0,
textures = {"snow_snowball.png"},
lastpos={},
collisionbox = {0,0,0,0,0,0},
}
--Snowball_entity.on_step()--> called when snowball is moving.
snow_snowball_ENTITY.on_step = function(self, dtime)
self.timer=self.timer+dtime
local pos = self.object:getpos()
local node = minetest.env:get_node(pos)
--Become item when hitting a node.
if self.lastpos.x~=nil then --If there is no lastpos for some reason.
if node.name ~= "air" then
minetest.env:place_node(self.lastpos,{name="snow:snow"})
self.object:remove()
end
end
self.lastpos={x=pos.x, y=pos.y, z=pos.z} -- Set lastpos-->Node will be added at last pos outside the node
end
minetest.register_entity("snow:snowball_entity", snow_snowball_ENTITY)
--Snowball.
minetest.register_craftitem("snow:snowball", {
Description = "Snowball",
inventory_image = "snow_snowball.png",
on_use = snow_shoot_snowball,
})
--Snow.
minetest.register_node("snow:snow", {
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
minetest.env:add_node(pos,{name="snow:moss",param2=1})
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)
end
end
minetest.register_on_dignode(unsnowify)
--Snow block.
minetest.register_node("snow:snow_block", {
description = "Snow",
tiles = {"snow_snow.png"},
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},
}),
})
--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},
})
minetest.register_craft({
output = 'snow:snow_block',
recipe = {
{'snow:snowball', 'snow:snowball'},
{'snow:snowball', 'snow:snowball'},
},
})
--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_flowing
--2: four water_flowings
--3: one water_source
minetest.register_abm({
nodenames = {"group:melts"},
neighbors = {"default:desert_sand", "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,
})
if snow.enable_snowfall then
--Snowing (WIP)
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.object:getvelocity().y == 0 then
minetest.env:place_node(self.lastpos,{name="snow:snow"})
self.object:remove()
end
self.lastpos={x=pos.x, y=pos.y, z=pos.z} -- Set lastpos-->Node will be added at last pos outside the node
end
minetest.register_entity("snow:fall_entity", snow_fall_ENTITY)
--Snowing abm
minetest.register_abm({
nodenames = {"default:dirt_with_grass"},
interval = 30,
chance = 50,
action = function(pos, node, active_object_count, active_object_count_wider)
local env = minetest.env
local perlin1 = env:get_perlin(112,3, 0.5, 150)
local test = perlin1:get2d({x=pos.x, y=pos.z})
if test > 0.53 then
if pos.y >= -10 then
if not env:find_node_near(pos, 10, "default:desert_sand") then
local ground_y = nil
for y=10,0,-1 do
if env:get_node({x=pos.x,y=y,z=pos.z}).name ~= "air" then
ground_y = y
break
end
end
if ground_y then
local n = env:get_node({x=pos.x,y=ground_y,z=pos.z})
if math.random(4) == 1 or (n.name ~= "snow:snow" and n.name ~= "snow:snow_block" and n.name ~= "snow:ice" and n.name ~= "default:water_source") then
snow_fall({x=pos.x,y=ground_y+15,z=pos.z})
if snow.debug then
print("snowfall at x"..pos.x.." y"..pos.z)
end
end
end
end
end
end
end
})
end

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license.txt Normal file
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--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
--Choose a biome type.
local pr = PseudoRandom(seed+57)
local biome = pr:next(1, 10)
local icebergs = biome == 2
local icesheet = biome == 3
local cool = biome > 9 --only spawns ice on edge of water
local icecave = biome == 5
local icehole = biome == 6 --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.
-- 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
--Should make things a bit faster.
local env = minetest.env
--Debugging function
local biomeToString = function(num)
if num == 1 or num == 7 or num == 8 then return "normal"
elseif num == 2 then return "icebergs"
elseif num == 3 then return "icesheet"
elseif num == 5 then return "icecave"
elseif num == 9 or num == 10 then return "cool"
elseif num == 6 then return "icehole"
else return "unknown" end
end
--Get map specific perlin
local perlin1 = env:get_perlin(112,3, 0.5, 150)
pr = PseudoRandom(seed+68)
--Speed hack: checks the corners and middle of the chunk for "snow biome".
if not (perlin1:get2d({x=x0, y=z0}) > 0.53) and not (perlin1:get2d({x=x1, y=z1}) > 0.53)
and not (perlin1:get2d({x=x0, y=z1}) > 0.53) and not (perlin1:get2d({x=x1, y=z0}) > 0.53)
and not (perlin1:get2d({x=(x1-x0)/2, y=(z1-z0)/2}) > 0.53) then
if debug then print(biomeToString(biome)..": ABORTED!") end
return
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 test = perlin1:get2d({x=x, y=z})
if test > 0.53 then
-- Find ground level (0...15)
local ground_y = nil
for y=maxp.y,0,-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" then
if shrubs and pr:next(1,28) == 1 then
--Spawns dry shrubs.
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="default:dry_shrub"})
elseif mossy and pr:next(1,10) == 1 then
--Spawns moss inside 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=1})
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"})
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 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 == "default:desert_sand" then
--Abort genaration.
if debug then
print(biomeToString(biome)..": ABORTED!")
end
return
end
end
end
end
if debug then
print(biomeToString(biome)..": Snow Biome Genarated")
end
end
end
)

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_____ __ __ _
/ ____| | \/ | | |
| (___ _ __ _____ __ | \ / | ___ __| |
\___ \| '_ \ / _ \ \ /\ / / | |\/| |/ _ \ / _` |
____) | | | | (_) \ V V / | | | | (_) | (_| |
|_____/|_| |_|\___/ \_/\_/ |_| |_|\___/ \__,_|
By Splizard and bob.
Forum post: http://minetest.net/forum/viewtopic.php?id=2290
Github: https://github.com/Splizard/minetest-mod-snow
INSTALL:
----------
Place this folder in your minetest mods folder.
NOTICE
While this mod is installed you may experience slow map loading when a snow biome is generated.
USAGE:
-------
If you walk around a bit you will find snow biomes scattered around the world.
There are six biome types:
* Normal
* Icebergs
* Icesheet
* Broken icesheet
* Icecave
* Coast
Snow can be picked up and thrown as snowballs or crafted into snow blocks.
Snow and ice melts when near warm blocks such as torches, and desert sand or igniters such as lava.
Snow blocks freeze water source blocks around them.
CRAFTING:
-----------
Snow Block:
Snowball Snowball
Snowball Snowball
CHANGELOG:
------------
Version 1.0
Initial release
Version 1.1
Better mapgen
UNINSTALL:
------------
Simply delete the folder snow from the mods folder.

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