169 lines
3.9 KiB
Lua
169 lines
3.9 KiB
Lua
-- Parameters
|
|
|
|
local PRECSPR = 11 -- Time scale for precipitation variation in minutes
|
|
local PRECOFF = 0.8 -- Precipitation noise threshold offset
|
|
local PROCHA = 0.2 -- Per player per globalstep processing chance
|
|
local FLAKES = 8 -- Snowflake density
|
|
local DROPS = 16 -- Rainfall density
|
|
local NISVAL = 39 -- Clouds RGB value at night
|
|
local DASVAL = 175 -- Clouds RGB value in daytime
|
|
|
|
local np_prec = {
|
|
offset = 0,
|
|
scale = 1,
|
|
spread = {x = PRECSPR, y = PRECSPR, z = PRECSPR},
|
|
seed = 813,
|
|
octaves = 1,
|
|
persist = 0,
|
|
lacunarity = 2.0,
|
|
--flags = ""
|
|
}
|
|
|
|
-- These 2 must match biome heat and humidity noise parameters for a world
|
|
|
|
local np_temp = {
|
|
offset = 50,
|
|
scale = 50,
|
|
spread = {x = 1000, y = 1000, z = 1000},
|
|
seed = 5349,
|
|
octaves = 3,
|
|
persist = 0.5,
|
|
lacunarity = 2.0,
|
|
--flags = ""
|
|
}
|
|
|
|
local np_humid = {
|
|
offset = 50,
|
|
scale = 50,
|
|
spread = {x = 1000, y = 1000, z = 1000},
|
|
seed = 842,
|
|
octaves = 3,
|
|
persist = 0.5,
|
|
lacunarity = 2.0,
|
|
--flags = ""
|
|
}
|
|
|
|
|
|
-- Stuff
|
|
|
|
local difsval = DASVAL - NISVAL
|
|
|
|
|
|
-- Initialise noise objects to nil
|
|
|
|
local nobj_temp = nil
|
|
local nobj_humid = nil
|
|
local nobj_prec = nil
|
|
|
|
|
|
-- Globalstep function
|
|
|
|
minetest.register_globalstep(function(dtime)
|
|
for _, player in ipairs(minetest.get_connected_players()) do
|
|
-- Randomise and spread processing load
|
|
if math.random() > PROCHA then
|
|
return
|
|
end
|
|
|
|
local ppos = player:getpos()
|
|
local pposx = math.floor(ppos.x)
|
|
local pposy = math.floor(ppos.y)
|
|
local pposz = math.floor(ppos.z)
|
|
|
|
local nobj_temp = nobj_temp or minetest.get_perlin(np_temp)
|
|
local nobj_humid = nobj_humid or minetest.get_perlin(np_humid)
|
|
local nobj_prec = nobj_prec or minetest.get_perlin(np_prec)
|
|
|
|
local nval_temp = nobj_temp:get2d({x = pposx, y = pposz})
|
|
local nval_humid = nobj_humid:get2d({x = pposx, y = pposz})
|
|
local nval_prec = nobj_prec:get2d({x = os.clock() / 60, y = 0})
|
|
|
|
-- Biome system: frozen biomes below heat 35,
|
|
-- deserts below humidity 20
|
|
local freeze = nval_temp < 35
|
|
local precip = nval_prec > (nval_humid - 50) / 50 + PRECOFF
|
|
|
|
-- Check if player is outside
|
|
local outside = minetest.get_node_light(ppos, 0.5) == 15
|
|
|
|
-- Occasionally reset player sky
|
|
if math.random() < 0.05 then
|
|
if precip then
|
|
-- Set overcast sky
|
|
local sval
|
|
local time = minetest.get_timeofday()
|
|
if time >= 0.5 then
|
|
time = 1 - time
|
|
end
|
|
|
|
-- Sky brightness transitions:
|
|
-- First transition (24000 -) 4500, (1 -) 0.1875
|
|
-- Last transition (24000 -) 5750, (1 -) 0.2396
|
|
if time <= 0.1875 then
|
|
sval = NISVAL
|
|
elseif time >= 0.2396 then
|
|
sval = DASVAL
|
|
else
|
|
sval = math.floor(NISVAL + ((time - 0.1875) / 0.0521) * difsval)
|
|
end
|
|
|
|
player:set_sky({r = sval, g = sval, b = sval + 16, a = 255}, "plain", {})
|
|
else
|
|
-- Reset sky to normal
|
|
player:set_sky({}, "regular", {})
|
|
end
|
|
end
|
|
|
|
if precip and outside then
|
|
-- Precipitation
|
|
if freeze then
|
|
-- Snowfall
|
|
for flake = 1, FLAKES do
|
|
minetest.add_particle({
|
|
pos = {
|
|
x = pposx - 32 + math.random(0, 63),
|
|
y = pposy + 10 + math.random(0, 4),
|
|
z = pposz - 26 + math.random(0, 63)
|
|
},
|
|
vel = {
|
|
x = 0.0,
|
|
y = -2.0,
|
|
z = -1.0
|
|
},
|
|
acc = {x = 0, y = 0, z = 0},
|
|
expirationtime = 12,
|
|
size = 2.8,
|
|
collisiondetection = false,
|
|
vertical = false,
|
|
texture = "snowdrift_snowflake" .. math.random(1, 4) .. ".png",
|
|
playername = player:get_player_name()
|
|
})
|
|
end
|
|
else
|
|
-- Rainfall
|
|
for flake = 1, DROPS do
|
|
minetest.add_particle({
|
|
pos = {
|
|
x = pposx - 8 + math.random(0, 16),
|
|
y = pposy + 6 + math.random(0, 4),
|
|
z = pposz - 8 + math.random(0, 16)
|
|
},
|
|
vel = {
|
|
x = 0.0,
|
|
y = -8.0,
|
|
z = 0.0
|
|
},
|
|
acc = {x = 0, y = 0, z = 0},
|
|
expirationtime = 2,
|
|
size = 2.8,
|
|
collisiondetection = false,
|
|
vertical = true,
|
|
texture = "snowdrift_raindrop.png",
|
|
playername = player:get_player_name()
|
|
})
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end)
|