+local minetest,vector,math = minetest,vector,math
local weather_channel = minetest.mod_channel_join("weather_type")
local weather_intake = minetest.mod_channel_join("weather_intake")
local weather_nodes_channel = minetest.mod_channel_join("weather_nodes")
weather_nodes_channel:send_all("")
local weather_max = 2
-
local mod_storage = minetest.get_mod_storage()
weather_type = mod_storage:get_int("weather_type")
base_color="#808080",
type="plain",
clouds=false,
-
+
day_sky = "#808080",
dawn_horizon = "#808080",
dawn_sky = "#808080",
fog_sun_tint = "#808080",
-
+
night_sky="#808080",
night_horizon="#808080"
})
base_color="#8cbafa",
type="regular",
clouds=true,
-
+
day_sky = "#8cbafa",
-
+
dawn_horizon = "#bac1f0",
dawn_sky = "#b4bafa",
-
+
night_sky="#006aff",
night_horizon="#4090ff"
})
-
+
player:set_sun({visible=true,sunrise_visible=true})
player:set_moon({visible=true})
player:set_stars({visible=true})
if name ~= "air" and name ~= "ignore" then
table.insert(all_nodes,name)
end
- end
+ end
end)
--this sends the client all nodes that weather can be on top of
--have the client send the server the ready signal
minetest.register_on_modchannel_message(function(channel_name, sender, message)
if channel_name == "weather_intake" then
+ minetest.after(0,function()
--print("sending player weather")
--for some reason this variable assignment does not work outside the scope of this function
local all_nodes_serialized = minetest.serialize(all_nodes)
weather_nodes_channel:send_all(all_nodes_serialized)
function_send_weather_type()
update_player_sky()
+ end)
end
end)
end)
--spawn snow nodes
+local cDoSnow_call_count_for_blanket_coverage = 50 -- how many calls of do_snow() are required for blanket snow coverage
+local cDoSnow_call_count_for_snowState_catchup = 20 -- how many calls of do_snow() (at most) before weather_snowState will catch up to the pattern on the ground (e.g. if player went somewhere else while it was snowing then came back)
+local cSnowState_LFSR_taps, cSnowState_LFSR_length = 0x100D, 8191 -- Fizzlefade constants for the shortest maximum length LFSR that can cover an 80 x 80 area (i.e. has a length larger than 6400)
+local cSnow_length_x = 80 -- (cSnow_length_x * cSnow_length_z) MUST be less than cSnowState_LFSR_length
+local cSnow_length_y = 80
+local cSnow_length_z = 80 -- (cSnow_length_x * cSnow_length_z) MUST be less than cSnowState_LFSR_length
+local snow_area = vector.new(cSnow_length_x, cSnow_length_y, cSnow_length_z)
+local snow_radius = vector.divide(snow_area, 2)
local pos
-local area = vector.new(80,40,80)
local min
local max
local subber = vector.subtract
local adder = vector.add
local area_index
local under_air = minetest.find_nodes_in_area_under_air
-local area
local round_it = vector.round
-local randomize_number = math.random
local n_vec = vector.new
local lightlevel
local get_light = minetest.get_node_light
local g_node = minetest.get_node
-local node
+local node_name
local def
-local buildable
+--local buildable
+local drawtype
local walkable
local liquid
local r_nodes = minetest.registered_nodes
local mass_set = minetest.bulk_set_node
local inserter = table.insert
local temp_pos
-local get_table_size = table.getn
-
+local floor, ceil = math.floor, math.ceil
+local weather_snowState
+local snowState_iterations_per_call = ceil(cSnowState_LFSR_length / cDoSnow_call_count_for_blanket_coverage)
+local snowState_max_catchup_per_call = ceil(cSnowState_LFSR_length / cDoSnow_call_count_for_snowState_catchup)
+local under_air_iterations
+local catchup_steps
+local lsfr_steps_count
+local lsb
+local location_bits
+local relative_x
+local relative_z
+local under_air_count
+local x, y, z
+
+local acceptable_drawtypes = {
+ ["normal"] = true,
+ ["glasslike"] = true,
+ ["glasslike_framed"] = true,
+ ["glasslike_framed_optional"] = true,
+ ["allfaces"] = true,
+ ["allfaces_optional"] = true,
+}
--this is debug
--local average = {}
+function XOR( num1, num2 )
+ -- This XOR function is excerpted from the Bitwise Operations Mod v1.2, by Leslie E. Krause
+ -- which is provided under the MIT License (MIT)
+ --
+ -- The MIT License (MIT)
+ --
+ -- Copyright (c) 2020, Leslie Krause (leslie@searstower.org)
+ --
+ -- Permission is hereby granted, free of charge, to any person obtaining a copy of this
+ -- software and associated documentation files (the "Software"), to deal in the Software
+ -- without restriction, including without limitation the rights to use, copy, modify, merge,
+ -- publish, distribute, sublicense, and/or sell copies of the Software, and to permit
+ -- persons to whom the Software is furnished to do so, subject to the following conditions:
+ --
+ -- The above copyright notice and this permission notice shall be included in all copies or
+ -- substantial portions of the Software.
+ --
+ -- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+ -- INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+ -- PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
+ -- FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+ -- OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ -- DEALINGS IN THE SOFTWARE.
+ --
+ -- For more details:
+ -- https://opensource.org/licenses/MIT
+
+ local exp = 1
+ local res = 0
+ while num1 > 0 or num2 > 0 do
+ local rem1 = num1 % 2
+ local rem2 = num2 % 2
+ if rem1 ~= rem2 then
+ -- set each bit
+ res = res + exp
+ end
+ num1 = ( num1 - rem1 ) / 2
+ num2 = ( num2 - rem2 ) / 2
+ exp = exp * 2
+ end
+ return res
+end
+
+
local function do_snow()
if weather_type == 1 then
for _,player in ipairs(minetest.get_connected_players()) do
--this is debug
- --local t0 = os.clock()
-
+ --local t0 = minetest.get_us_time()/1000000
+
pos = round_it(player:get_pos())
-
- area = n_vec(40,40,40)
- min = subber(pos, area)
- max = adder(pos, area)
-
+ min = subber(pos, snow_radius)
+ max = adder(pos, snow_radius)
+
area_index = under_air(min, max, all_nodes)
-
+ --local node_search_time = math.ceil((minetest.get_us_time()/1000000 - t0) * 1000)
+
spawn_table = {}
-
- --the highest value is always indexed last in minetest.find_nodes_in_area_under_air,
+
+ --the highest value is always indexed last in minetest.find_nodes_in_area_under_air,
--so all that is needed is to iterate through it backwards and hook into the first
--y value on the x and y and ignore the rest
- for key = get_table_size(area_index),1,-1 do
+ under_air_count = 0
+ for key = #area_index,1,-1 do
temp_pos = area_index[key]
if not spawn_table[temp_pos.x] then spawn_table[temp_pos.x] = {} end
if not spawn_table[temp_pos.x][temp_pos.z] then
spawn_table[temp_pos.x][temp_pos.z] = temp_pos.y
+ under_air_count = under_air_count + 1
end
end
-
+
--save old method just in case useful or turns out it's faster after all
--for _,index in pairs(area_index) do
-- if not spawn_table[index.x] then spawn_table[index.x] = {} end
-- spawn_table[index.x][index.z] = index.y
-- end
--end
-
- --find the highest y value
- bulk_list = {}
- ice_list = {}
- for x,x_index in pairs(spawn_table) do
- for z,y in pairs(x_index) do
- if randomize_number(1100) >= 1098 then
- lightlevel = get_light(n_vec(x,y+1,z), 0.5)
- if lightlevel >= 14 then
- --make it so buildable to nodes get replaced
- node = g_node(n_vec(x,y,z)).name
- def = r_nodes[node]
- buildable = def.buildable_to
- walkable = def.walkable
- liquid = (def.liquidtype ~= "none")
-
- if not liquid then
- if not buildable and g_node(n_vec(x,y+1,z)).name ~= "weather:snow" and walkable == true then
- inserter(bulk_list, n_vec(x,y+1,z))
- elseif buildable == true and node ~= "weather:snow" then
- inserter(bulk_list, n_vec(x,y,z))
+
+ bulk_list = {}
+ ice_list = {}
+ under_air_iterations = 0
+ catchup_steps = 0
+ lsfr_steps_count = 0
+ repeat
+ -- "fizzelfade" in the snow with a Linear Feedback Shift Register (LFSR)
+ -- https://fabiensanglard.net/fizzlefade/index.php
+ lsb = weather_snowState % 2 -- Get the output bit.
+ weather_snowState = floor(weather_snowState / 2) -- Shift register
+ if lsb == 1 then
+ weather_snowState = XOR(weather_snowState, cSnowState_LFSR_taps)
+ end
+ lsfr_steps_count = lsfr_steps_count + 1
+
+ location_bits = weather_snowState - 1 -- LFSR values start at 1, but we want snow to be able to fall on (0, 0)
+ relative_x = location_bits % cSnow_length_x
+ relative_z = floor(location_bits / cSnow_length_x)
+
+ if relative_z < cSnow_length_z then
+ x = (floor(min.x / cSnow_length_x) * cSnow_length_x) + relative_x -- align fizzelfade coords world-global
+ if x < min.x then x = x + cSnow_length_x end -- ensure it falls in the same space as area_index
+ local x_index = spawn_table[x]
+ if x_index ~= nil then
+ z = (floor(min.z / cSnow_length_z) * cSnow_length_z) + relative_z -- align fizzelfade coords world-global
+ if z < min.z then z = z + cSnow_length_z end -- ensure it falls in the same space as area_index
+ y = x_index[z]
+ if y ~= nil then
+
+ -- We hit a location that's in the spawn_table
+ under_air_iterations = under_air_iterations + 1
+
+ lightlevel = get_light(n_vec(x,y+1,z), 0.5)
+ if lightlevel >= 14 then
+ -- daylight is above or near this node, so snow can fall on it
+
+ node_name = g_node(n_vec(x,y,z)).name
+ def = r_nodes[node_name]
+ --buildable = def.buildable_to
+
+ drawtype = acceptable_drawtypes[def.drawtype]
+
+ walkable = def.walkable
+ liquid = (def.liquidtype ~= "none")
+
+ if not liquid and walkable and drawtype and node_name ~= "main:ice" then
+ --if buildable then
+ -- if node_name ~= "weather:snow" then
+ -- inserter(bulk_list, n_vec(x,y,z))
+ -- else
+ -- catchup_steps = catchup_steps + 1 -- we've already snowed on this spot
+ -- end
+ --elseif walkable then
+ if g_node(n_vec(x,y+1,z)).name ~= "weather:snow" then
+ inserter(bulk_list, n_vec(x,y+1,z))
+ else
+ catchup_steps = catchup_steps + 1 -- we've already snowed on this spot
+ end
+ --end
+ elseif node_name == "main:water" then
+ inserter(ice_list, n_vec(x,y,z))
end
- elseif g_node(n_vec(x,y,z)).name == "main:water" then
- inserter(ice_list, n_vec(x,y,z))
end
+
end
end
end
- end
+ until (lsfr_steps_count - catchup_steps) >= snowState_iterations_per_call or catchup_steps >= snowState_max_catchup_per_call
+
if bulk_list then
mass_set(bulk_list, {name="weather:snow"})
end
if ice_list then
mass_set(ice_list, {name="main:ice"})
end
-
-
+
+
--this is debug
--[[
- local chugent = math.ceil((os.clock() - t0) * 1000)
+ local chugent = math.ceil((minetest.get_us_time()/1000000 - t0) * 1000)
print("---------------------------------")
- print ("Snow generation time " .. chugent .. " ms")
+ print("find_nodes_in_area_under_air() time: " .. node_search_time .. " ms")
+ print("New Snow generation time: " .. chugent .. " ms [" .. (chugent - node_search_time) .. " ms]")
inserter(average, chugent)
local a = 0
print(dump(average))
a = a / get_table_size(average)
print("average = "..a.."ms")
- print("---------------------------------")
- ]]--
+ minetest.chat_send_all("total nodes under air: " .. under_air_count .. ", LFSR iterations: " .. lsfr_steps_count .. ", under-air hits (nodes tested): " .. under_air_iterations .. " Snow added: " .. (#bulk_list + #ice_list) .. ", snow already there (catchup): " .. catchup_steps)
+ --print("---------------------------------")
+ --]]--
end
end
-
+
minetest.after(3, function()
do_snow()
end)
--this sets random weather
local initial_run = true
+local new_weather
local function randomize_weather()
if not initial_run then
- weather_type = math.random(0,weather_max)
+ new_weather = math.random(0,weather_max)
+ if new_weather ~= weather_type or not weather_type then
+ weather_type = new_weather
+ else
+ weather_type = 0
+ end
mod_storage:set_int("weather_type", weather_type)
else
initial_run = false
function_send_weather_type()
update_player_sky()
- minetest.after((math.random(5,7)+math.random())*60, function()
+ minetest.after((math.random(15,20)+math.random())*60, function()
randomize_weather()
end)
end
minetest.register_on_mods_loaded(function()
+ minetest.after(0,function()
if mod_storage:get_int("weather_initialized") == 0 then
mod_storage:set_int("weather_initialized",1)
weather_type = math.random(0,weather_max)
mod_storage:set_int("weather_type", weather_type)
end
+ weather_snowState = math.max(mod_storage:get_int("weather_snowState"), 1)
+
randomize_weather()
+ end)
end)
minetest.register_on_shutdown(function()
mod_storage:set_int("weather_type", weather_type)
+ mod_storage:set_int("weather_snowState", weather_snowState)
end)
local snowball_throw = function(player)
local vel = self.object:get_velocity()
local hit = false
local pos = self.object:get_pos()
-
+
--hit object with the snowball
for _,object in ipairs(minetest.get_objects_inside_radius(pos, 1)) do
if (object:is_player() and object:get_hp() > 0 and object:get_player_name() ~= self.thrower) or (object:get_luaentity() and object:get_luaentity().mob == true and object ~= self.owner) then
- object:punch(self.object, 2,
+ object:punch(self.object, 2,
{
full_punch_interval=1.5,
damage_groups = {damage=0,fleshy=0},
break
end
end
-
+
if (self.oldvel and ((vel.x == 0 and self.oldvel.x ~= 0) or (vel.y == 0 and self.oldvel.y ~= 0) or (vel.z == 0 and self.oldvel.z ~= 0))) or hit == true then
-
- minetest.sound_play("wool",{pos=pos, pitch = math.random(80,100)/100})
- minetest.add_particlespawner({
- amount = 20,
- -- Number of particles spawned over the time period `time`.
-
- time = 0.001,
- -- Lifespan of spawner in seconds.
- -- If time is 0 spawner has infinite lifespan and spawns the `amount` on
- -- a per-second basis.
-
- minpos = pos,
- maxpos = pos,
- minvel = {x=-2, y=3, z=-2},
- maxvel = {x=2, y=5, z=2},
- minacc = {x=0, y=-9.81, z=0},
- maxacc = {x=0, y=-9.81, z=0},
- minexptime = 1,
- maxexptime = 3,
- minsize = 1,
- maxsize = 1,
- -- The particles' properties are random values between the min and max
- -- values.
- -- pos, velocity, acceleration, expirationtime, size
-
- collisiondetection = true,
-
- collision_removal = true,
-
- object_collision = false,
-
- texture = "snowflake_"..math.random(1,2)..".png",
-
- })
-
- self.object:remove()
-
+ --snowballs explode in the nether
+ if pos.y <= -10033 and pos.y >= -20000 then
+ self.object:remove()
+ tnt(pos,4)
+ else
+ minetest.sound_play("wool",{pos=pos, pitch = math.random(80,100)/100})
+ minetest.add_particlespawner({
+ amount = 20,
+ -- Number of particles spawned over the time period `time`.
+
+ time = 0.001,
+ -- Lifespan of spawner in seconds.
+ -- If time is 0 spawner has infinite lifespan and spawns the `amount` on
+ -- a per-second basis.
+
+ minpos = pos,
+ maxpos = pos,
+ minvel = {x=-2, y=3, z=-2},
+ maxvel = {x=2, y=5, z=2},
+ minacc = {x=0, y=-9.81, z=0},
+ maxacc = {x=0, y=-9.81, z=0},
+ minexptime = 1,
+ maxexptime = 3,
+ minsize = 1,
+ maxsize = 1,
+ -- The particles' properties are random values between the min and max
+ -- values.
+ -- pos, velocity, acceleration, expirationtime, size
+
+ collisiondetection = true,
+
+ collision_removal = true,
+
+ object_collision = false,
+
+ texture = "snowflake_"..math.random(1,2)..".png",
+
+ })
+ self.object:remove()
+ end
end
-
+
self.oldvel = vel
end
minetest.register_entity("weather:snowball", snowball)