Add "glow" mod.

README.md

@@ -89,6 +89,7 @@ The following mods are also included:
     * [weather][] ([LGPL/WTFPL/CC-BY-SA](mods/weather/weather/README))
 * world/
     * [areas][] ([LGPL](mods/world/areas/LICENSE.txt))
+    * [glow][] (GPL)
     * [worldedge][] ([DWYWPL](mods/world/worldedge/licence.txt))
 
 
@@ -108,6 +109,7 @@ The following mods are also included:
 [craft_guide]: https://forum.minetest.net/viewtopic.php?t=2334
 [farming_plus]: https://forum.minetest.net/viewtopic.php?t=2787
 [fort_spikes]: https://forum.minetest.net/viewtopic.php?t=14574
+[glow]: https://forum.minetest.net/viewtopic.php?t=6300
 [helicopter]: https://forum.minetest.net/viewtopic.php?t=6183
 [homedecor]: https://forum.minetest.net/viewtopic.php?t=2041
 [kpgmobs]: https://forum.minetest.net/viewtopic.php?t=8798

mods/world/glow/README

@@ -0,0 +1 @@
+A mod for Minetest which adds various glowing elements to enhance the ambiance of caves and the night landscape.

mods/world/glow/depends.txt

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+default

mods/world/glow/init.lua

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+-- boilerplate to support localized strings if intllib mod is installed
+
+local S
+if intllib then
+	S = intllib.Getter()
+else
+	S = function(s) return s end
+end
+
+
+-- WORMS --------------------------------------------------
+
+minetest.register_node("glow:cave_worms", {
+	description = S("Glow Worms"),
+	drawtype = "nodebox",
+	tiles = { "worms.png" },
+	inventory_image = "worms.png",
+	wield_image = "worms.png",
+	groups = { dig_immediate = 2 },
+	sounds = default.node_sound_stone_defaults(),
+	drop = "glow:cave_worms",
+	paramtype = "light",
+	light_source = 4,
+	paramtype2 = "facedir",
+	sunlight_propagates = true,
+	walkable = false,
+	node_box = {
+		type = "fixed",
+		fixed = { -1/2, -1/2, -1/2, 1/2, -15/32, 1/2 },
+	},
+	selection_box = {
+		type = "fixed",
+		fixed = { -1/2, -1/2, -1/2, 1/2, -7/16, 1/2 },
+	},
+	on_place = minetest.rotate_node,
+})
+
+local function near_surface(pos)
+	for dx = -1, 1, 1 do
+		for dy = -1, 1, 1 do
+			for dz = -1, 1, 1 do
+				local dpos = { x=pos.x+dx, y=pos.y+dy, z=pos.z+dz }
+				local light = minetest.get_node_light(dpos, 0.5) -- 0.5 means noon
+				if light and light > 5 then
+					return true
+				end
+			end
+		end
+	end
+	return false
+end
+
+local function place_worms(pos)
+	local axes = {
+		{ x=pos.x,   y=pos.y-1, z=pos.z   },
+		{ x=pos.x,   y=pos.y,   z=pos.z-1 },
+		{ x=pos.x,   y=pos.y,   z=pos.z+1 },
+		{ x=pos.x-1, y=pos.y,   z=pos.z   },
+		{ x=pos.x+1, y=pos.y,   z=pos.z   },
+		{ x=pos.x,   y=pos.y+1, z=pos.z   },
+	}
+	for i, cpos in ipairs(axes) do
+		if minetest.get_node(cpos).name == "default:stone" then
+			local facedir = (i-1) * 4 + math.random(0, 3) -- see 6d facedir info
+			minetest.set_node(pos, { name = "glow:cave_worms", param2 = facedir })
+			return
+		end
+	end
+end
+
+local function make_worms(pos)
+	local spot = minetest.find_node_near(pos, 1, "air")
+	if not spot or near_surface(spot) then
+		return
+	end
+	local minp = vector.subtract(pos, 6)
+	local maxp = vector.add(pos, 6)
+	if  #(minetest.find_nodes_in_area(minp, maxp, "default:lava_source")) == 0
+	and #(minetest.find_nodes_in_area(minp, maxp, "glow:cave_worms")) == 0
+	and #(minetest.find_nodes_in_area(minp, maxp, "group:water")) > 1 then
+		place_worms(spot)
+	end
+end
+
+minetest.register_on_generated(function(minp, maxp)
+	for _,pos in pairs(minetest.find_nodes_in_area(minp, maxp, "default:stone")) do
+		if math.random() < 0.001 then
+			make_worms(pos)
+		end
+	end
+end)
+
+minetest.register_abm({
+	nodenames = { "default:stone" },
+	neighbors = { "air" },
+	interval = 120.0,
+	chance = 200,
+	action = make_worms,
+})
+
+minetest.register_abm({
+	nodenames = { "glow:cave_worms" },
+	interval = 60.0,
+	chance = 10,
+	action = function(pos)
+		if math.random() < 0.7 then
+			local minp = vector.subtract(pos, 2)
+			local maxp = vector.add(pos, 2)
+			local worms_count = #(minetest.find_nodes_in_area(minp, maxp, "glow:cave_worms"))
+			if worms_count < 20 then
+				local spot = minetest.find_node_near(pos, 3, "air")
+				if spot and not near_surface(spot) then
+					place_worms(spot)
+					return
+				end
+			end
+		end
+		minetest.remove_node(pos)
+	end,
+})
+
+--[[
+function is_facing(pos, nodename)
+	for d = -1, 1, 2 do
+		if nodename == minetest.get_node({pos.x+d, pos.y,   pos.z  }).name then return true end
+		if nodename == minetest.get_node({pos.x,   pos.y+d, pos.z  }).name then return true end
+		if nodename == minetest.get_node({pos.x,   pos.y,   pos.z+d}).name then return true end
+	end
+	return false
+end--]]
+
+-- clean up stupid way of doing worms ---------------------
+
+minetest.register_node("glow:stone_with_worms", {
+	description = S("Glow Worms in Stone"),
+	tiles = { "default_stone.png^worms.png" },
+	is_ground_content = true,
+	groups = { cracky = 1 },
+	sounds = default.node_sound_stone_defaults(),
+	drop = "glow:stone_with_worms",
+	paramtype = "light",
+	light_source = 4,
+})
+
+minetest.register_abm({
+	nodenames = { "glow:stone_with_worms" },
+	interval = 60.0,
+	chance = 1,
+	action = function(pos)
+		minetest.set_node(pos, { name = "default:stone" })
+	end,
+})
+
+
+-- SHROOMS -------------------------------------------------
+
+minetest.register_node("glow:shrooms", {
+	description = S("Glow Shrooms"),
+	drawtype = "plantlike",
+	tiles = { "shrooms.png" },
+	inventory_image = "shrooms.png",
+	wield_image = "shrooms.png",
+	drop = 'glow:shrooms',
+	groups = { snappy=3, flammable=2, flower=1, flora=1, attached_node=1 },
+	sunlight_propagates = true,
+	walkable = false,
+	pointable = true,
+	diggable = true,
+	climbable = false,
+	buildable_to = true,
+	paramtype = "light",
+	light_source = 3,
+	sounds = default.node_sound_leaves_defaults(),
+	selection_box = {
+		type = "fixed",
+		fixed = { -0.4, -0.5, -0.4, 0.4, 0.0, 0.4 },
+	},
+})
+
+local function add_shrooms(pos)
+	if minetest.find_node_near(pos, 2, "glow:shrooms") then
+		return
+	end
+	for nx = -1, 1, 2 do
+		for nz = -1, 1, 2 do
+			for ny = 1, -1, -1 do
+				if math.random() < 0.2 then
+					local p = { x=pos.x+nx, y=pos.y-1+ny, z=pos.z+nz }
+					if minetest.get_item_group(minetest.get_node(p).name, "soil") ~= 0 then
+						p.y = p.y+1
+						if minetest.get_node(p).name == "air" then
+							minetest.set_node(p, { name = "glow:shrooms" })
+						end
+						break
+					end
+				end
+			end
+		end
+	end
+end
+
+minetest.register_on_generated(function(minp, maxp, seed)
+	for _,pos in pairs(minetest.find_nodes_in_area(minp, maxp, "default:tree")) do
+		if math.random() < 0.2
+		and minetest.get_node({x=pos.x, y=pos.y-1, z=pos.z}).name ~= "default:tree" then
+			add_shrooms(pos)
+		end
+	end
+end)
+
+minetest.register_abm({
+	nodenames = { "default:tree" },
+	neighbors = {
+		"air",
+		"group:soil",
+	},
+	interval = 60.0,
+	chance = 60,
+	action = function(pos)
+		local minp = vector.subtract(pos, 1)
+		local maxp = vector.add(pos, 1)
+		local shroom_count = #(minetest.find_nodes_in_area(minp, maxp, "glow:shrooms"))
+		if shroom_count == 0 or (shroom_count == 1 and math.random() < 0.3) then
+			add_shrooms(pos)
+		end
+	end,
+})
+
+minetest.register_abm({
+	nodenames = { "glow:shrooms" },
+	neighbors = {
+		"air",
+		"group:soil",
+	},
+	interval = 40.0,
+	chance = 10,
+	action = function(pos)
+		if math.random() < 0.3 then
+			add_shrooms(pos)
+		else
+			minetest.remove_node(pos)
+		end
+	end,
+})
+
+
+-- FIREFLIES ----------------------------------------------
+
+minetest.register_node("glow:fireflies", {
+	description = S("Fireflies"),
+	drawtype = "glasslike",
+	tiles = {
+		{
+			name = "fireflies.png",
+			animation = {
+				type = "vertical_frames",
+				aspect_w = 16,
+				aspect_h = 16,
+				length = 2,
+			},
+		},
+	},
+	alpha = 100,
+	paramtype = "light",
+	light_source = 4,
+	walkable = false,
+	pointable = false,
+	diggable = false,
+	climbable = false,
+	buildable_to = true,
+	drop = "",
+})
+
+minetest.register_abm({
+	nodenames = { "air" },
+	neighbors = {
+		"default:grass_1",
+		"default:grass_2",
+		"default:grass_3",
+		"default:grass_4",
+		"default:grass_5",
+	},
+	interval = 2.0,
+	chance = 300,
+	action = function(pos)
+		local time = minetest.get_timeofday()
+		if time <= 0.74 and time >= 0.22 then
+			return
+		end
+		if not minetest.find_node_near(pos, 9, "glow:fireflies") then
+			minetest.set_node(pos, {name = "glow:fireflies"})
+		end
+	end,
+})
+
+minetest.register_abm({
+	nodenames = {"glow:fireflies"},
+	interval = 1.0,
+	chance = 2,
+	action = minetest.remove_node,
+})

mods/world/glow/locale/de.txt

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+# Translation by Xanthin
+
+Glow Worms in Stone = Gluehwuermchen im Stein
+Glow Shrooms = Leuchtpilze
+Fireflies = Leuchtkaefer

mods/world/glow/locale/template.txt

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+# Template
+
+Glow Worms in Stone = 
+Glow Shrooms = 
+Fireflies =