split weathers into separate mod pack mods, major code refactor

rain/command.lua

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+
+
+minetest.register_chatcommand("cw", {
+  description = "normalize weather",
+  privs = {rain_manager = true},
+  func = function(name, param)
+    weather.state = 'clear'
+    save_weather()
+  end
+})

rain/depends.txt

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+weather_core

rain/init.lua

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+rain = {}
+
+rain.particles_count = 50
+
+rain.sound_handler = function(player) 
+  return minetest.sound_play("weather_rain", {
+    object = player,
+    max_hear_distance = 2,
+    loop = true,
+  })
+end
+
+-- set skybox based on time (darker if night lighter otherwise)
+rain.set_sky_box = function(player)
+  if (minetest.get_timeofday() < 0.8) then
+    player:set_sky({r=65, g=80, b=100}, "plain", nil)
+  else
+    player:set_sky({r=10, g=10, b=15}, "plain", nil)
+  end
+end
+
+-- creating manually parctiles instead of particles spawner because of easier to control
+-- spawn position.
+rain.add_rain_particles = function(player, dtime)
+  rain.last_rp_count = 0
+  for i=rain.particles_count, 1,-1 do
+    local random_pos_x, random_pos_y, random_pos_z = get_random_pos_by_player_look_dir(player)
+    if minetest.get_node_light({x=random_pos_x, y=random_pos_y, z=random_pos_z}, 0.5) == 15 then
+      rain.last_rp_count = rain.last_rp_count + 1
+      minetest.add_particle({
+        pos = {x=random_pos_x, y=random_pos_y, z=random_pos_z},
+        velocity = {x=0, y=-10, z=0},
+        acceleration = {x=0, y=-30, z=0},
+        expirationtime = 0.3,
+        size = math.random(0.5, 3),
+        collisiondetection = true,
+        vertical = true,
+        texture = rain.get_texture(),
+        playername = player:get_player_name()
+      })
+    end
+  end
+end
+
+-- Simple random texture getter
+rain.get_texture = function()
+  local texture_name
+  local random_number = math.random()
+  if random_number > 0.33 then
+    texture_name = "rain_raindrop_1.png"
+  elseif random_number > 0.66 then
+    texture_name = "rain_raindrop_2.png"
+  else
+    texture_name = "rain_raindrop_3.png"
+  end
+  return texture_name;
+end
+
+-- register player for rain weather. 
+-- basically needs for origin sky reference and rain sound controls.
+rain.add_player = function(player)
+  if weather.players[player:get_player_name()] == nil then
+    local player_meta = {}
+    player_meta.origin_sky = {player:get_sky()}
+    rain.set_sky_box(player)
+    weather.players[player:get_player_name()] = player_meta
+  end
+end
+
+-- remove player from player list effected by rain.
+-- be sure to remove sound before removing player otherwise soundhandler reference will be lost.
+rain.remove_player = function(player)
+  local player_meta = weather.players[player:get_player_name()]
+  if player_meta ~= nil and player_meta.origin_sky ~= nil then
+    player:set_sky(player_meta.origin_sky[1], player_meta.origin_sky[2], player_meta.origin_sky[3])
+    weather.players[player:get_player_name()] = nil
+  end
+end
+
+-- adds and removes rain sound depending how much rain particles around player currently exist.
+-- have few seconds delay before each check to avoid on/off sound too often 
+-- when player stay on 'edge' where sound should play and stop depending from random raindrop appearance.
+rain.update_sound = function(player)
+  local player_meta = weather.players[player:get_player_name()]
+  if player_meta ~= nil then
+    if player_meta.sound_updated ~= nil and player_meta.sound_updated + 5 > os.time() then
+      return false
+    end
+  
+    if player_meta.sound_handler ~= nil then
+      if rain.last_rp_count == 0 then
+        minetest.sound_stop(player_meta.sound_handler)
+        player_meta.sound_handler = nil
+      end
+    elseif rain.last_rp_count > 0 then
+      player_meta.sound_handler = rain.sound_handler(player)      
+    end
+    
+    player_meta.sound_updated = os.time()
+  end
+end
+
+-- rain sound removed from player.
+rain.remove_sound = function(player)
+  local player_meta = weather.players[player:get_player_name()]
+  if player_meta ~= nil and player_meta.sound_handler ~= nil then
+    minetest.sound_stop(player_meta.sound_handler)
+    player_meta.sound_handler = nil
+  end
+end
+
+-- callback function for removing rain
+rain.clear = function() 
+  for _, player in ipairs(minetest.get_connected_players()) do
+    rain.remove_sound(player)
+    rain.remove_player(player)
+  end
+end
+
+minetest.register_globalstep(function(dtime)
+  if weather.state ~= "rain" then 
+    return false
+  end
+  
+  for _, player in ipairs(minetest.get_connected_players()) do
+    if (is_underwater(player)) then 
+      return false
+    end
+    rain.add_player(player)
+    rain.add_rain_particles(player, dtime)
+    rain.update_sound(player)
+  end
+end)
+
+if weather.known_weathers.rain == nil then
+  weather.known_weathers.rain = {
+    chance = 15,
+    clear = rain.clear
+  }
+end