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8 years ago
--[[
--=================
--======================================
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.
--]]
--=============================================================
-- CODE STUFF
--=============================================================
if snow.enable_snowfall then
local weather_legacy
local read_weather_legacy = function ()
local file = io.open(minetest.get_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(minetest.get_worldpath().."/weather_v6", "w+")
file:write(weather_legacy)
file:close()
end
weather_legacy = read_weather_legacy() or ""
minetest.register_globalstep(function(dtime)
if weather_legacy == "snow" then
if math.random(1, 10000) == 1 then
weather_legacy = "none"
save_weather_legacy()
end
else
if math.random(1, 50000) == 2 then
weather_legacy = "snow"
save_weather_legacy()
end
end
end)
--Get snow at position.
local get_snow = function(pos)
--Legacy support.
if weather_legacy == "snow" then
local perlin1 = minetest.env:get_perlin(112,3, 0.5, 150)
if perlin1:get2d( {x=pos.x, y=pos.z} ) > 0.53 then
return true
else
return false
end
else
return false
end
end
local addvectors = vector and vector.add
--Returns a random position between minp and maxp.
local randpos = function (minp, maxp)
local x,y,z
if minp.x > maxp.x then
x = math.random(maxp.x,minp.x) else x = math.random(minp.x,maxp.x) end
y = minp.y
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=y,z=z}
end
local snow_fall=function (pos, player, animate)
local ground_y = nil
for y=pos.y+10,pos.y+20,1 do
local n = minetest.env: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+10,pos.y-15,-1 do
local n = minetest.env: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}
local spos = {x=pos.x, y=ground_y+10, z=pos.z}
if get_snow(pos) then
if animate then
local minp = addvectors(spos, {x=-9, y=3, z=-9})
local maxp = addvectors(spos, {x= 9, y=5, z= 9})
local vel = {x=0, y= -1, z=-1}
local acc = {x=0, y= 0, z=0}
minetest.add_particlespawner(3, 0.5,
minp, maxp,
vel, vel,
acc, acc,
5, 5,
50, 50,
false, "weather_snow.png", 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
end
-- Snow
minetest.register_globalstep(function(dtime)
for _, player in ipairs(minetest.get_connected_players()) do
local ppos = player:getpos()
local sminp = addvectors(ppos, {x=-20, y=0, z=-20})
local smaxp = addvectors(ppos, {x= 20, y=0, z= 20})
-- Make sure player is not in a cave/house...
if get_snow(ppos) and minetest.env:get_node_light(ppos, 0.5) == 15 then
local minp = addvectors(ppos, {x=-9, y=3, z=-9})
local maxp = addvectors(ppos, {x= 9, y=5, z= 9})
local minp_deep = addvectors(ppos, {x=-5, y=3.2, z=-5})
local maxp_deep = addvectors(ppos, {x= 5, y=1.6, z= 5})
local vel = {x=0, y= -1, z=-1}
local acc = {x=0, y= 0, z=0}
if not snow.lighter_snowfall then
minetest.add_particlespawner(5, 0.5,
minp, maxp,
vel, vel,
acc, acc,
5, 5,
25, 25,
false, "weather_snow.png", player:get_player_name())
minetest.add_particlespawner(4, 0.5,
minp_deep, maxp_deep,
vel, vel,
acc, acc,
4, 4,
25, 25,
false, "weather_snow.png", player:get_player_name())
if math.random(1,5) == 4 then
snow_fall(randpos(sminp, smaxp), player)
end
else
if math.random(1,5) == 4 then
snow_fall(randpos(sminp, smaxp), player, true)
end
end
else
if math.random(1,5) == 4 then
snow_fall(randpos(sminp, smaxp), player, true)
end
end
end
end)
end