Add teleporter prerequisites.

abms.lua

@@ -241,6 +241,46 @@ minetest.register_abm({
 	end
 })
 
+-- meteor strikes
+minetest.register_abm({
+	nodenames = {"default:dirt_with_grass", "default:dirt_with_dry_grass"},
+	neighbors = {"air"},
+	interval = 100000 * fun_caves.time_factor,
+	catch_up = false,
+	chance = 10000,
+	action = function(pos, node)
+		local ps = {}
+		local players = minetest.get_connected_players()
+		for i = 1, #players do
+			local pp = players[i]:getpos()
+			if pp and pp.y > 0 then
+				local sky = {}
+				sky.bgcolor, sky.type, sky.textures = players[i]:get_sky()
+				ps[#ps+1] = { p = players[i], sky = sky }
+				players[i]:set_sky(0xffffff, "plain", {})
+			end
+		end
+
+		minetest.set_node(pos, {name="fun_caves:meteorite_crater"})
+		--print('Fun Caves: meteorite impact '..pos.x..','..pos.y..','..pos.z)
+
+		minetest.after(1, function()
+			for i = 1, #ps do
+				ps[i].p:set_sky(ps[i].sky.bgcolor, ps[i].sky.type, ps[i].sky.textures)
+			end
+		end)
+	end
+})
+
+minetest.register_abm({
+	nodenames = {"fun_caves:meteorite_crater"},
+	interval = 100 * fun_caves.time_factor,
+	chance = 10,
+	action = function(pos, node)
+		minetest.set_node(pos, {name="default:dirt"})
+	end
+})
+
 -- new mushrooms
 minetest.register_abm({
 	nodenames = {"default:dirt"},

fortress.lua

@@ -2,6 +2,12 @@ local rand = math.random
 local floor = math.floor
 
 
+local treasures = {
+	'fun_caves:stone_with_aquamarines',
+	'fun_caves:stone_with_sky_iron',
+	'default:obsidian',
+}
+
 fun_caves.fortress = function(minp, maxp, data, area, node)
 	-- invisible maze
 	-- hungry maze
@@ -16,6 +22,7 @@ fun_caves.fortress = function(minp, maxp, data, area, node)
 	local inner_floor = node['fun_caves:dungeon_floor_1']
 	local outer_wall = node['fun_caves:dungeon_wall_2']
 	local inner_wall = node['fun_caves:dungeon_wall_1']
+	local treasure_count = 0
 
 	for y2 = 0, n-1 do
 		--for y2 = 0, 0 do
@@ -40,7 +47,12 @@ fun_caves.fortress = function(minp, maxp, data, area, node)
 						end
 					elseif (z - minp.z) % 5 == 0 or (x - minp.x) % 5 == 0 then
 						--data[ivm] = fun_caves.DEBUG and node["default:glass"] or inner_wall
-						data[ivm] = inner_wall
+						if y2 == 0 and rand(3000) == 1 then
+							treasure_count = treasure_count + 1
+							data[ivm] = node[treasures[rand(#treasures)]]
+						else
+							data[ivm] = inner_wall
+						end
 					else
 						data[ivm] = node["air"]
 					end
@@ -88,4 +100,5 @@ fun_caves.fortress = function(minp, maxp, data, area, node)
 			end
 		end
 	end
+	--print(treasure_count)
 end

mapgen.lua

@@ -48,6 +48,7 @@ fun_caves.is_fortress = function(pos, cs, debug)
 	-- Fix this to get csize, somehow.
 	-- Remember that this function may be called
 	--  before any chunks are generated.
+
 	local cs = cs or {x=80, y=80, z=80}
 	local offset = floor(cs.y / 2) - 8 + 1
 
@@ -63,10 +64,11 @@ fun_caves.is_fortress = function(pos, cs, debug)
 	local z = floor((pos.z + offset) / cs.z)
 
 	local n = minetest.get_perlin(fortress_noise):get3d({x=x, y=y, z=z})
-	if debug then
+	if fun_caves.DEBUG and floor((n * 10000) % 4) == 1 then
-		print(x, y, z, n, floor((n * 10000) % 19))
+		print('fortress ('..x..','..y..','..zn..')')
+		return true
 	end
-	if floor((n * 10000) % 19) == 1 or fun_caves.DEBUG then
+	if floor((n * 10000) % 19) == 1 then
 		return true
 	end
 

nodes.lua

@@ -159,12 +159,12 @@ local function teleporter(user, area, power)
 	end
 end
 
-minetest.register_craftitem("fun_caves:teleporter_steel_aquamarine", {
+minetest.register_craftitem("fun_caves:teleporter_iron_aquamarine", {
-	description = "Steel and Aquamarine Teleporter",
+	description = "Iron and Aquamarine Teleporter",
 	drawtype = "plantlike",
 	paramtype = "light",
-	tiles = {"fun_caves_tesseract_steel_aqua.png"},
+	tiles = {"fun_caves_tesseract_iron_aqua.png"},
-	inventory_image = "fun_caves_tesseract_steel_aqua.png",
+	inventory_image = "fun_caves_tesseract_iron_aqua.png",
 	groups = {dig_immediate = 3},
 	sounds = default.node_sound_stone_defaults(),
 	on_use = function(itemstack, user, pointed_thing)
@@ -172,8 +172,27 @@ minetest.register_craftitem("fun_caves:teleporter_steel_aquamarine", {
 	end,
 })
 
-minetest.register_craftitem("fun_caves:pure_steel", {
+minetest.register_craft({
-	description = "Incredibly Pure Steel",
+	output = 'fun_caves:teleporter_iron_aquamarine',
+	recipe = {
+		{'fun_caves:sky_iron', 'default:copper_ingot', 'fun_caves:sky_iron'},
+		{'fun_caves:perfect_aquamarine', 'fun_caves:perfect_aquamarine', 'fun_caves:perfect_aquamarine'},
+		{'fun_caves:sky_iron', 'default:obsidian_shard', 'fun_caves:sky_iron'},
+	}
+})
+
+minetest.register_craftitem("fun_caves:meteorite", {
+	description = "Iron Meteorite",
+	drawtype = "plantlike",
+	paramtype = "light",
+	tiles = {"fun_caves_meteorite.png"},
+	inventory_image = "fun_caves_meteorite.png",
+	groups = {dig_immediate = 3},
+	sounds = default.node_sound_stone_defaults(),
+})
+
+minetest.register_craftitem("fun_caves:sky_iron", {
+	description = "Sky Iron",
 	drawtype = "plantlike",
 	paramtype = "light",
 	tiles = {"default_steel_ingot.png"},
@@ -182,6 +201,76 @@ minetest.register_craftitem("fun_caves:pure_steel", {
 	sounds = default.node_sound_stone_defaults(),
 })
 
+local newnode = fun_caves.clone_node("default:stone_with_iron")
+newnode.description = "Stone With Sky Iron"
+newnode.drop = "fun_caves:sky_iron"
+minetest.register_node("fun_caves:stone_with_sky_iron", newnode)
+
+minetest.register_craftitem("fun_caves:meteoritic_iron_crucible", {
+	description = "Crucible of Meteoritic Iron",
+	drawtype = "plantlike",
+	paramtype = "light",
+	tiles = {"crucible.png"},
+	inventory_image = "crucible.png",
+	groups = {dig_immediate = 3},
+	sounds = default.node_sound_stone_defaults(),
+})
+
+minetest.register_craft({
+	output = 'fun_caves:meteoritic_iron_crucible',
+	recipe = {
+		{'fun_caves:meteorite', 'fun_caves:meteorite', 'fun_caves:meteorite'},
+		{'fun_caves:meteorite', 'fun_caves:meteorite', 'fun_caves:meteorite'},
+		{'fun_caves:meteorite', 'fun_caves:crucible', 'fun_caves:meteorite'},
+	}
+})
+
+minetest.register_craft({
+	type = "cooking",
+	output = "fun_caves:sky_iron",
+	recipe = "fun_caves:meteoritic_iron_crucible",
+	cooktime = 30,
+})
+
+
+minetest.register_craftitem("fun_caves:crucible", {
+	description = "Crucible",
+	drawtype = "plantlike",
+	paramtype = "light",
+	tiles = {"crucible.png"},
+	inventory_image = "crucible.png",
+	groups = {dig_immediate = 3},
+	sounds = default.node_sound_stone_defaults(),
+})
+
+minetest.register_craft({
+	output = 'fun_caves:crucible',
+	recipe = {
+		{'default:clay', '', 'default:clay'},
+		{'default:clay', '', 'default:clay'},
+		{'', 'default:clay', ''},
+	}
+})
+
+minetest.register_node("fun_caves:stone_with_aquamarines", {
+	description = "Aquamarine Ore",
+	tiles = {"default_stone.png^default_mineral_diamond.png"},
+	groups = {cracky = 1},
+	drop = "fun_caves:perfect_aquamarine",
+	sounds = default.node_sound_stone_defaults(),
+})
+
+minetest.register_ore({
+	ore_type       = "scatter",
+	ore            = "fun_caves:stone_with_aquamarines",
+	wherein        = "default:stone",
+	clust_scarcity = 30 * 30 * 30,
+	clust_num_ores = 1,
+	clust_size     = 1,
+	y_min          = -6000,
+	y_max          = 31000,
+})
+
 minetest.register_craftitem("fun_caves:perfect_aquamarine", {
 	description = "Perfect Aquamarine",
 	drawtype = "plantlike",
@@ -192,11 +281,9 @@ minetest.register_craftitem("fun_caves:perfect_aquamarine", {
 	sounds = default.node_sound_glass_defaults(),
 })
 
-minetest.register_craft({
+local newnode = fun_caves.clone_node("default:dirt")
-	output = 'fun_caves:teleporter_steel_aquamarine',
+newnode.description = "Meteor Crater"
-	recipe = {
+newnode.tiles = {"fun_caves_crater.png", "default_dirt.png", "default_dirt.png", "default_dirt.png", "default_dirt.png", "default_dirt.png"}
-		{'fun_caves:pure_steel', 'default:copper_ingot', 'fun_caves:pure_steel'},
+newnode.drop = "fun_caves:meteorite"
-		{'fun_caves:perfect_aquamarine', 'fun_caves:perfect_aquamarine', 'fun_caves:perfect_aquamarine'},
+newnode.groups.soil = 0
-		{'fun_caves:pure_steel', 'default:obsidianbrick', 'fun_caves:pure_steel'},
+minetest.register_node("fun_caves:meteorite_crater", newnode)
-	}
-})

textures/image_credits.txt

@@ -1,3 +1,4 @@
 Original spider textures: AspireMint
 Original goblins textures and models: Francisco "FreeLikeGNU" Athens
 Original tesseract: Claudio Rocchini (cc-by-sa 2.5), https://en.wikipedia.org/wiki/File:Runci_trunc_tessaract.png
+Original meteorite: MeteoriteKid (cc-by-sa 3), https://en.wikipedia.org/wiki/File:Oriented_Taza_Meteorite.jpg