structure change - convert to mod; fix for #4, #5

snow.lua

@@ -0,0 +1,76 @@
+snow = {}
+
+snow.particles_count = 25
+
+-- calculates coordinates and draw particles for snow weather 
+snow.add_rain_particles = function(player)
+  rain.last_rp_count = 0
+  for i=snow.particles_count, 1,-1 do
+    local random_pos_x, random_pos_y, random_pos_z = weather.get_random_pos_by_player_look_dir(player)
+    random_pos_y = math.random() + math.random(player:getpos().y - 1, player:getpos().y + 7)
+    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 = math.random(-1,-0.5), y = math.random(-2,-1), z = math.random(-1,-0.5)},
+        acceleration = {x = math.random(-1,-0.5), y=-0.5, z = math.random(-1,-0.5)},
+        expirationtime = 0.6,
+        size = math.random(0.5, 1),
+        collisiondetection = true,
+        collision_removal = true,
+        vertical = true,
+        texture = snow.get_texture(),
+        playername = player:get_player_name()
+      })
+    end
+  end
+end
+
+snow.set_sky_box = function()
+  skycolor.colors = {
+    {r=0, g=0, b=0},
+    {r=241, g=244, b=249},
+    {r=0, g=0, b=0},
+  }
+  skycolor.active = true
+end
+
+snow.clear = function() 
+  skycolor.active = false
+  skycolor.colors = {}
+  skycolor.set_default_sky()
+end
+
+-- Simple random texture getter
+snow.get_texture = function()
+  local texture_name
+  local random_number = math.random()
+  if random_number > 0.5 then
+    texture_name = "weather_pack_snow_snowflake1.png"
+  else
+    texture_name = "weather_pack_snow_snowflake2.png"
+  end
+  return texture_name;
+end
+
+minetest.register_globalstep(function(dtime)
+  if weather.state ~= "snow" then 
+    return false
+  end
+  
+  snow.set_sky_box()
+  for _, player in ipairs(minetest.get_connected_players()) do
+    if (weather.is_underwater(player)) then 
+      return false
+    end
+    snow.add_rain_particles(player)
+  end
+end)
+
+-- register snow weather
+if weather.reg_weathers.snow == nil then
+  weather.reg_weathers.snow = {
+    chance = 10,
+    clear = snow.clear
+  }
+end