mirror of
https://github.com/minetest/minetest_game.git
synced 2024-11-19 08:10:16 +01:00
124 lines
3.2 KiB
Lua
124 lines
3.2 KiB
Lua
-- Always load the API
|
|
dofile(minetest.get_modpath(minetest.get_current_modname()) .. "/api.lua")
|
|
|
|
-- Disable by mapgen or setting
|
|
|
|
if minetest.settings:get_bool("enable_weather") == false then
|
|
return
|
|
end
|
|
|
|
local mg_name = minetest.get_mapgen_setting("mg_name")
|
|
if mg_name == "v6" or mg_name == "singlenode" then
|
|
-- set a default shadow intensity for mgv6 and singlenode
|
|
minetest.register_on_joinplayer(function(player)
|
|
player:set_lighting({ shadows = { intensity = 0.33 } })
|
|
end)
|
|
|
|
return
|
|
end
|
|
|
|
-- Default implementation for noise based cloud appearance
|
|
|
|
local TSCALE = 600 -- Time scale of noise variation in seconds
|
|
|
|
local np_density = {
|
|
offset = 0.5,
|
|
scale = 0.5,
|
|
spread = {x = TSCALE, y = TSCALE, z = TSCALE},
|
|
seed = 813,
|
|
octaves = 1,
|
|
persist = 0,
|
|
lacunarity = 2,
|
|
}
|
|
|
|
local np_thickness = {
|
|
offset = 0.5,
|
|
scale = 0.5,
|
|
spread = {x = TSCALE, y = TSCALE, z = TSCALE},
|
|
seed = 96,
|
|
octaves = 1,
|
|
persist = 0,
|
|
lacunarity = 2,
|
|
}
|
|
|
|
local np_speedx = {
|
|
offset = 0,
|
|
scale = 1,
|
|
spread = {x = TSCALE, y = TSCALE, z = TSCALE},
|
|
seed = 911923,
|
|
octaves = 1,
|
|
persist = 0,
|
|
lacunarity = 2,
|
|
}
|
|
|
|
local np_speedz = {
|
|
offset = 0,
|
|
scale = 1,
|
|
spread = {x = TSCALE, y = TSCALE, z = TSCALE},
|
|
seed = 5728,
|
|
octaves = 1,
|
|
persist = 0,
|
|
lacunarity = 2,
|
|
}
|
|
|
|
local nobj_density = nil
|
|
local nobj_thickness = nil
|
|
local nobj_speedx = nil
|
|
local nobj_speedz = nil
|
|
|
|
local function rangelim(value, lower, upper)
|
|
return math.min(math.max(value, lower), upper)
|
|
end
|
|
|
|
local t_offset
|
|
do
|
|
local meta = minetest.get_mod_storage()
|
|
if meta:contains("time_offset") then
|
|
t_offset = meta:get_int("time_offset")
|
|
else
|
|
-- Use random offset so not each new world behaves the same.
|
|
t_offset = math.random(0, 300000)
|
|
meta:set_int("time_offset", t_offset)
|
|
end
|
|
end
|
|
|
|
function weather.get(player)
|
|
-- Adjusted time in seconds
|
|
local time = math.floor(minetest.get_gametime() - t_offset)
|
|
|
|
nobj_density = nobj_density or minetest.get_perlin(np_density)
|
|
nobj_thickness = nobj_thickness or minetest.get_perlin(np_thickness)
|
|
nobj_speedx = nobj_speedx or minetest.get_perlin(np_speedx)
|
|
nobj_speedz = nobj_speedz or minetest.get_perlin(np_speedz)
|
|
|
|
local n_density = nobj_density:get_2d({x = time, y = 0}) -- 0 to 1
|
|
local n_thickness = nobj_thickness:get_2d({x = time, y = 0}) -- 0 to 1
|
|
local n_speedx = nobj_speedx:get_2d({x = time, y = 0}) -- -1 to 1
|
|
local n_speedz = nobj_speedz:get_2d({x = time, y = 0}) -- -1 to 1
|
|
|
|
-- Fallback to mid-value 50 for very old worlds
|
|
local humid = minetest.get_humidity(player:get_pos()) or 50
|
|
-- Default and classic density value is 0.4, make this happen
|
|
-- at humidity midvalue 50 when n_density is at midvalue 0.5.
|
|
-- density_max = 0.25 at humid = 0.
|
|
-- density_max = 0.8 at humid = 50.
|
|
-- density_max = 1.35 at humid = 100.
|
|
local density_max = 0.8 + ((humid - 50) / 50) * 0.55
|
|
-- Range limit density_max to always have occasional
|
|
-- small scattered clouds at extreme low humidity.
|
|
local density = rangelim(density_max, 0.2, 1.0) * n_density
|
|
|
|
return {
|
|
clouds = {
|
|
density = density,
|
|
thickness = math.max(math.floor(
|
|
rangelim(32 * humid / 100, 8, 32) * n_thickness
|
|
), 2),
|
|
speed = {x = n_speedx * 4, z = n_speedz * 4},
|
|
},
|
|
lighting = {
|
|
shadows = { intensity = 0.7 * (1 - density) }
|
|
}
|
|
}
|
|
end
|