Version 0.1.1 more, and varying snowfall

README.txt

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+-- Snowdrift 0.1.1 by paramat
+-- For latest stable Minetest and back to 0.4.6
+-- Depends default
+-- Licenses: Code WTFPL. Textures CC BY-SA.
+-- This is intended to be used as alternative snowfall for the snow mod by Splizard.
+-- The code is partly derived from weather mod by Jeija and snow mod version 1.8 by Splizard.
+
+Version 0.1.0
+---------------
+* Snowfall only in the snow biomes of snow mod by Splizard. You will need to disable snow mod snowfall.
+* Minimal processing for less powerful computers.
+* Snowfall is only seen by a player if the player is outside under open sky.
+* Each snowflake has it's own random trajectory, initial position, initial velocity and acceleration.
+* Snow falls at an average of 1m/s.
+* Snow drifts southwards at an average of 1m/s, a slightly lower speed than the southward cloud drift.
+* Snowflakes are sized to match 16x16 texture resolution and the icons used in my texture pack.
+* The snow box around the player is 128x128x32 nodes in size.
+* Parameter PROCHA controls snow density and processing load, default is 0.5, try 1 for denser snow.
+
+Version 0.1.1
+-------------
+* Mod is too light, doubled maximum snow density, added second snowflake design with a square symmetry.
+* Snow density is now smoothly varied by how deep into a snow biome a player is.

depends.txt

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+default

init.lua

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+-- Snowdrift 0.1.1 by paramat
+-- For latest stable Minetest and back to 0.4.6
+-- Depends default
+-- Licenses: Code WTFPL. Textures CC BY-SA.
+-- This is intended to be used as alternative snowfall for the snow mod by Splizard.
+-- The code is partly derived from weather mod by Jeija and snow mod version 1.8 by Splizard.
+
+-- Parameters
+
+local MAXCHA = 1 -- (0 to 1) Maximum per globalstep chance of processing a player. Controls snow density and processing load.
+
+local SEED1 = 112 -- 112 -- These 5 parameters should match the values you use in snow mod.
+local OCTA1 = 3 -- 3
+local PERS1 = 0.5 -- 0.5
+local SCAL1 = 256 -- 150 -- Large scale size of snow biomes.
+local SNOTHR = 0.4 -- 0.53 -- Perlin noise > SNOTHR for snow biome.
+
+-- Stuff
+
+snowdrift = {}
+
+-- Globalstep function
+
+minetest.register_globalstep(function(dtime)
+	for _, player in ipairs(minetest.get_connected_players()) do
+		if math.random() > MAXCHA then
+			return
+		end
+		local ppos = player:getpos()
+		if minetest.env:get_node_light(ppos, 0.5) ~= 15 then
+			return
+		end
+		local perlin1 = minetest.env:get_perlin(SEED1, OCTA1, PERS1, SCAL1)
+		local noise1 = perlin1:get2d({x = ppos.x, y = ppos.z})
+		local biome = noise1 - SNOTHR
+		if math.random() > biome then
+			return
+		end
+		local posi = {x = ppos.x - 64 + math.random(0, 128), y= ppos.y + 16, z= ppos.z - 48 + math.random(0, 128)}
+		local velo = {x = math.random() / 5 - 0.1, y = math.random() / 5 - 1.1, z = math.random() / 5 - 1.1}
+		local acce = {x = math.random() / 50 - 0.01, y = math.random() / 50 - 0.01, z = math.random() / 50 - 0.01}
+		minetest.add_particle(
+			posi,
+			velo,
+			acce,
+			32,
+			2.8,
+			false, "snowdrift_snowflake1.png", player:get_player_name())
+		local posi = {x = ppos.x - 64 + math.random(0, 128), y= ppos.y + 16, z= ppos.z - 48 + math.random(0, 128)}
+		local velo = {x = math.random() / 5 - 0.1, y = math.random() / 5 - 1.1, z = math.random() / 5 - 1.1}
+		local acce = {x = math.random() / 50 - 0.01, y = math.random() / 50 - 0.01, z = math.random() / 50 - 0.01}
+		minetest.add_particle(
+			posi,
+			velo,
+			acce,
+			32,
+			2.8,
+			false, "snowdrift_snowflake2.png", player:get_player_name())
+	end
+end)

license.txt

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+            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+                    Version 2, December 2004
+
+ Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>
+
+ Everyone is permitted to copy and distribute verbatim or modified
+ copies of this license document, and changing it is allowed as long
+ as the name is changed.
+
+            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. You just DO WHAT THE FUCK YOU WANT TO.
+