Mineclone compatibility (#36)

* latest versions of mapgen_helper and subterrane

* initial work

* call it "minetest_game" compatibility instead of "default" compatibility

* Getting started on moving all default dependencies to a single root mod

* distilling out more dependencies

* fix some typos

* more default dependencies

* beds

* start getting some MCL equivalents set up

* mine gas dependencies

* reorganize

* add some mapgen stuff

* getting close to actually being able to run mineclone with this

* it actually runs! Crashes with out-of-memory error when you try to go below -64, but it's a start.

* hide flowing pit plasma from creative inventory

* mineclone 5 settings

* Update subterrane

* get rid of meselamp dependency, bring in ancient lanterns from deep roads

* stair dependencies

* add mcl fences

* add mcl blast resistance and hardness to everything. Also an alternate name for Nethercap in MCL, since "nether" has another meaning there.

* buckets of oil and syrup should work in mineclone now

* 'splosions!

* make hunters avoid repaired ancient lanterns

* mapgen torchspine wasn't having its timer set

* split mapgen compatibility code into its own file

* bypass dependency indirection for df_farming.

* apply threshold alpha to food items, they look better that way

* bypass dependency indirection for df_mapitems

* bypass dependency indirection for df_primordial_items

* bypass dependency indirection for df_trees

* bypass dependency indirection for df_underworld_items

* bypass dependency indirection for df_caverns

* fixing up the puzzle seal to work in both

* fix puzzle seal formspec for mcl

* create built-in substitutes for fireflies and bones mods for when those aren't available

* set up mcl dungeon loot for underworld warriors, port over some translations from default

* overlooked a debug

* add itemslot backgrounds for mcl

* added mineclone groups to all registered nodes. TODO: craftitems.

This was extremely tedious. Completely untested, aside from simply running the game.

* minor fixes to the built-in bones node

* eatable group for edibles

* clean up some TODOs

* adjust pit plasma abm conditions

* add df_ambience

* fixing up explosions. Also make slade sand diggable in mcl, and fix a bug in web generators

* make tower cap caves less chirpy, fix bigger goblin hut schematic, allow glowing spindlestem extract bottles

* avoid an undeclared global check

* alas, cave pearls aren't set up right for attached_node_facedir.

* bunch of work on mineclone ores, moved main config into df_dependencies

* add a few more ores

* update depends in mod.conf

* add opaque group to light-sensitive dirt types

Mineclone adds the "opaque" group only to non-light nodes, and torches check for the opaque group to decide whether they can be placed there. light-sensitive nodes need the "light" paramtype to work, though. So adding the opaque group manually to these.

* add a touch of reverb to one of the whisper tracks, it didn't fit with the others without it

* bloodthorn also needs to be set opaque

* add sound to torchspines

* isolate Nethercap translation name to make it easier to swap out in Mineclone contexts

* ambience tweak

* fix dirt spreads

https://github.com/FaceDeer/dfcaverns/issues/35

* adding achievements! Almost all untested yet.

* fix a few achievements glitches

* tweak some more achievements, add delay when achievements unlock other achievements

* fix farming achievements, fix spindlestem callbacks on place

* icons for farming achievements

* more achievement icons, fix ancient lantern achievement

* two more icons, update text

* add icons for upper cavern layers

* all achievements have icons now. Also add another sound to the magma sea ambience

* hook into awards' trigger system to get "x/y" progress displayed for the multi-achievement achievements

* ironically, Mineclone has an old version of awards that is incompatible with my trigger work.

* every award should now have a description and a difficulty.

* removing leftovers

* missing callbacks for farmables

* put growth restrictions on farmables so the achievement doesn't trigger inappropriately.

* enable ores in MCL2, fix some undeclared globals, fix icecap growth in MCL (achievements are a good debugging tool)

* get *all* the copper and iron containing nodes

* fix old awards mod's handling of grouped dig items

* Add a little bonus for players who activate a slade breacher - a handheld 'splosion tool

* used the wrong drop method

* beef up explosions in MCL, make slade brick craftable from slade sand and lava

* better creative mode checks, fix crash when digging walls in MCL

* Update subterrane

* various bugfixes and tweaks

* whipping up a simple puzzle chest to give a clue about ancient numbering

The coding is done, but UI and a node mesh need to be done

* prepare for some art tomorrow

* chest node and sounds

* images for the combination dials

* add puzzle chests to the underworld buildings

* update translations

* oops, can't initialize the contents of puzzle chests every time or players get endless stuff

* add backgrounds to item slots in MCL

* wrap the existing function rather than copy and pasting it

* fix bucket dependency in cooking recipes

* add _mcl_saturation to edibles

df_underworld_items/ancient_lanterns.lua

@@ -0,0 +1,149 @@
+local S = minetest.get_translator(minetest.get_current_modname())
+
+local lantern_nodebox = {
+	{-0.5, -0.5, -0.5, -0.3125, 0.5, -0.3125},
+	{-0.5, -0.5, 0.3125, -0.3125, 0.5, 0.5},
+	{0.3125, -0.5, 0.3125, 0.5, 0.5, 0.5},
+	{0.3125, -0.5, -0.5, 0.5, 0.5, -0.3125},
+	{-0.3125, 0.3125, -0.5, 0.3125, 0.5, -0.3125},
+	{-0.3125, 0.3125, 0.3125, 0.3125, 0.5, 0.5},
+	{0.3125, 0.3125, -0.3125, 0.5, 0.5, 0.3125},
+	{-0.5, 0.3125, -0.3125, -0.3125, 0.5, 0.3125},
+	{-0.5, -0.5, -0.3125, -0.3125, -0.3125, 0.3125},
+	{0.3125, -0.5, -0.3125, 0.5, -0.3125, 0.3125},
+	{-0.3125, -0.5, 0.3125, 0.3125, -0.3125, 0.5},
+	{-0.3125, -0.5, -0.5, 0.3125, -0.3125, -0.3125},
+	{-0.375, -0.375, -0.375, 0.375, 0.375, 0.375},
+}
+
+local mese_crystal_node = df_dependencies.node_name_mese_crystal
+local brick_texture = "dfcaverns_slade_brick.png"
+local lantern_texture = df_dependencies.texture_meselamp
+local ancient_lantern_sound = df_dependencies.sound_stone({ footstep = { name = "bedrock2_step", gain = 1 } })
+
+local invulnerable = df_underworld_items.config.invulnerable_slade and not minetest.settings:get_bool("creative_mode")
+
+local can_dig
+if invulnerable then
+	can_dig = function(pos, player)
+		return minetest.check_player_privs(player, "server")
+	end
+end
+
+local slade_mcl_blast_resistance = 1200
+local slade_mcl_hardness = 50
+local slade_groups = {stone=1, slade=1, pit_plasma_resistant=1, mese_radiation_shield=1, cracky = 3, creative_breakable=1, building_block=1, material_stone=1}
+if invulnerable then
+	slade_groups.immortal = 1
+	slade_mcl_blast_resistance = 3600000
+	slade_mcl_hardness = -1
+end
+
+-- override this to allow achievements to be recorded without requiring a dependency
+df_underworld_items.ancient_lantern_fixed = function(pos, player) end
+
+local punch_fix = function(pos, node, puncher, pointed_thing)
+	local wielded = puncher:get_wielded_item()
+	if wielded:get_name() == mese_crystal_node then
+		minetest.set_node(pos, {name="df_underworld_items:ancient_lantern_slade"})
+		minetest.get_node_timer(pos):stop()
+		if not minetest.is_creative_enabled(puncher:get_player_name()) then
+			wielded:take_item()
+			puncher:set_wielded_item(wielded)
+		end
+		df_underworld_items.ancient_lantern_fixed(pos, puncher)
+		return
+	end
+	minetest.node_punch(pos, node, puncher, pointed_thing)
+end
+
+minetest.register_node("df_underworld_items:ancient_lantern_slade", {
+	description = S("Ancient Lantern"),
+	paramtype2 = "facedir",
+	place_param2 = 0,
+	tiles = {brick_texture .. "^(" .. lantern_texture .. "^[mask:dfcaverns_lantern_mask.png)"},
+	is_ground_content = false,
+	groups = slade_groups,
+	sounds = ancient_lantern_sound,
+	drawtype= "nodebox",
+	light_source = minetest.LIGHT_MAX,
+	node_box = {
+		type = "fixed",
+		fixed = lantern_nodebox,
+	},
+	can_dig = can_dig,
+	_mcl_blast_resistance = slade_mcl_blast_resistance,
+	_mcl_hardness = slade_mcl_hardness,
+})
+
+minetest.register_node("df_underworld_items:ancient_lantern_slade_worn", {
+	description = S("Ancient Lantern"),
+	paramtype2 = "facedir",
+	place_param2 = 0,
+	tiles = {brick_texture .. "^(" .. lantern_texture .. "^[multiply:#FF8888^[mask:dfcaverns_lantern_mask.png)"},
+	is_ground_content = false,
+	groups = slade_groups,
+	sounds = ancient_lantern_sound,
+	drawtype= "nodebox",
+	light_source = 6,
+	node_box = {
+		type = "fixed",
+		fixed = lantern_nodebox,
+	},
+	_mcl_blast_resistance = slade_mcl_blast_resistance,
+	_mcl_hardness = slade_mcl_hardness,
+	on_construct = function(pos)
+		minetest.get_node_timer(pos):start(math.random(100, 200))
+	end,
+	on_timer = function(pos, elapsed)
+		minetest.swap_node(pos, {name="df_underworld_items:ancient_lantern_slade_burnt_out"})
+		if math.random() < 0.1 then
+			minetest.get_node_timer(pos):start(math.random(30, 60))
+		else
+			minetest.get_node_timer(pos):start(0.25)
+		end
+	end,
+	on_punch = punch_fix,
+	can_dig = can_dig,
+})
+
+minetest.register_node("df_underworld_items:ancient_lantern_slade_burnt_out", {
+	description = S("Ancient Lantern"),
+	paramtype2 = "facedir",
+	place_param2 = 0,
+	tiles = {brick_texture .. "^(" .. lantern_texture .. "^[multiply:#884444^[mask:dfcaverns_lantern_mask.png)"},
+	is_ground_content = false,
+	groups = slade_groups,
+	sounds = ancient_lantern_sound,
+	drawtype= "nodebox",
+	light_source = 0,
+	node_box = {
+		type = "fixed",
+		fixed = lantern_nodebox,
+	},
+	drops = "df_underworld_items:ancient_lantern_slade_worn",
+	_mcl_blast_resistance = slade_mcl_blast_resistance,
+	_mcl_hardness = slade_mcl_hardness,
+	on_construct = function(pos)
+		minetest.get_node_timer(pos):start(math.random(100, 200))
+	end,
+	on_timer = function(pos, elapsed)
+		minetest.swap_node(pos, {name="df_underworld_items:ancient_lantern_slade_worn"})
+		if math.random() < 0.1 then
+			minetest.get_node_timer(pos):start(math.random(300, 600))
+		else
+			minetest.get_node_timer(pos):start(0.25)
+		end
+	end,
+	on_punch = punch_fix,
+	can_dig = can_dig,
+})
+
+--minetest.register_craft({
+--	output = "df_underworld_items:ancient_lantern_slade",
+--	type = "shapeless",
+--	recipe = {
+--		"group:df_underworld_items_ancient_lantern",
+--		mese_crystal_node,
+--	}
+--})

df_underworld_items/config.lua

@@ -25,4 +25,5 @@ end
 
 setting("bool", "invulnerable_slade", true, "Slade is invulnerable to players")
 setting("bool", "destructive_pit_plasma", true, "Pit plasma destroys adjacent nodes")
-setting("bool", "underworld_hunter_statues", true, "Enable hunter statues in the underworld")
+setting("bool", "underworld_hunter_statues", true, "Enable hunter statues in the underworld")
+setting("bool", "enable_slade_drill", true, "Enable slade drills")

df_underworld_items/crystals_amethyst.lua

@@ -1,4 +1,4 @@
-local S = df_underworld_items.S
+local S = minetest.get_translator(minetest.get_current_modname())
 
 minetest.register_node("df_underworld_items:glow_amethyst", {
 	description = S("Glowing Amethyst Block"),
@@ -6,13 +6,15 @@ minetest.register_node("df_underworld_items:glow_amethyst", {
 	_doc_items_usagehelp = df_underworld_items.doc.glow_amethyst_usage,
 	tiles = {"dfcaverns_glow_amethyst.png"},
 	is_ground_content = false,
-	groups = {cracky=3, pit_plasma_resistant=1},
-	sounds = default.node_sound_glass_defaults(),
+	groups = {cracky=3, pit_plasma_resistant=1, pickaxey = 4, building_block = 1,}, -- deliberately not in material_stone group to keep pit plasma ABM efficient
+	sounds = df_dependencies.sound_glass(),
 	light_source = 6,
 	paramtype = "light",
 	use_texture_alpha = "blend",
 	drawtype = "glasslike",
 	sunlight_propagates = true,
+	_mcl_blast_resistance = 6,
+	_mcl_hardness = 2,
 })
 
 if minetest.get_modpath("radiant_damage") and radiant_damage.override_radiant_damage and radiant_damage.config.enable_mese_damage then

df_underworld_items/dependencies.lua

@@ -1,10 +0,0 @@
-df_underworld_items.abm_neighbors = {}
-
--- common nodes that can be found next to pit plasma, triggering matter degradation
--- don't trigger on air, that's for sparkle generation
-df_underworld_items.abm_neighbors.pit_plasma = {"group:stone", "df_underworld_items:glow_amethyst", "group:lava", "group:water"}
-
--- This stuff should only be used during initialization
-minetest.after(0, function()
-	df_underworld_items.node_name = nil
-end)

df_underworld_items/doc.lua

@@ -4,7 +4,7 @@ if not minetest.get_modpath("doc") then
 	return
 end
 
-local S = df_underworld_items.S
+local S = minetest.get_translator(minetest.get_current_modname())
 
 df_underworld_items.doc.glowstone_desc = S("Bright glowing stones of unknown origin found lodged in the crevices of the underworld's ceiling.")
 df_underworld_items.doc.glowstone_usage = S("These stones are highly volatile and should not be disturbed.")
@@ -21,4 +21,7 @@ df_underworld_items.doc.glow_amethyst_desc = S("Glowing purple crystals that gro
 df_underworld_items.doc.glow_amethyst_usage = S("These crystals have no known use.")
 
 df_underworld_items.doc.pit_plasma_desc = S("The liquid found in the deepest pits in the underworld is highly dangerous and damaging.")
-df_underworld_items.doc.pit_plasma_usage = S("The only use for this material is that it destroys whatever is thrown into it. It cannot otherwise be manipulated.")
+df_underworld_items.doc.pit_plasma_usage = S("The only use for this material is that it destroys whatever is thrown into it. It cannot otherwise be manipulated.")
+
+df_underworld_items.doc.slade_drill_desc = S("This shard of a spent slade breacher doesn't appear to have been intended as a portable tool, but it can be used as one.")
+df_underworld_items.doc.slade_drill_usage = S("Use this on a target to unleash the energies used to dig through the foundations of the world.")

df_underworld_items/glow_stone.lua

@@ -1,4 +1,4 @@
-local S = df_underworld_items.S
+local S = minetest.get_translator(minetest.get_current_modname())
 
 local glowstone_def = {
 	_doc_items_longdesc = df_underworld_items.doc.glowstone_desc,
@@ -18,16 +18,21 @@ local glowstone_def = {
 		},
 	},
 	is_ground_content = false,
-	groups = {cracky=3},
-	sounds = default.node_sound_glass_defaults(),
+	groups = {cracky=3, pickaxey = 1, building_block = 1, material_stone =1},
+	sounds = df_dependencies.sound_glass(),
 	paramtype = "light",
 	drawtype = "glasslike",
 	drop = "",
 	sunlight_propagates = true,
+	_mcl_blast_resistance = 0.5,
+	_mcl_hardness = 0.5,
 }
-if minetest.get_modpath("tnt") then
+local tnt_boom = df_dependencies.tnt_boom
+if tnt_boom then
 	glowstone_def.on_dig = function(pos, node, digger)
-		tnt.boom(pos, {radius=3})
+		if minetest.node_dig(pos, node, digger) then
+			tnt_boom(pos, {radius=3})
+		end	
 	end
 end
 minetest.register_node("df_underworld_items:glowstone", glowstone_def)

df_underworld_items/glowing_pit_plasma.lua

@@ -1,4 +1,6 @@
-local S = df_underworld_items.S
+local S = minetest.get_translator(minetest.get_current_modname())
+
+local lava_source = df_dependencies.node_name_lava_source
 
 minetest.register_node("df_underworld_items:pit_plasma", {
 	description = S("Glowing Pit Plasma"),
@@ -17,7 +19,7 @@ minetest.register_node("df_underworld_items:pit_plasma", {
 		},
 	},
 	
-	groups={pit_plasma=1, pit_plasma_resistant=1},
+	groups={pit_plasma=1, pit_plasma_resistant=1,destroys_items=1, set_on_fire=15, fire_damage=1, liquid=1},
 	walkable = false,
 	pointable = false,
 	diggable = false,
@@ -36,6 +38,8 @@ minetest.register_node("df_underworld_items:pit_plasma", {
 	is_ground_content = false,
 	light_source = minetest.LIGHT_MAX,
 	paramtype = "light",
+	_mcl_blast_resistance = 3600000,
+	_mcl_hardness = -1,
 })
 
 minetest.register_node("df_underworld_items:pit_plasma_flowing", {
@@ -65,7 +69,7 @@ minetest.register_node("df_underworld_items:pit_plasma_flowing", {
 			},
 		},
 	},
-	groups={pit_plasma=1, pit_plasma_resistant=1},
+	groups={pit_plasma=1, pit_plasma_resistant=1, not_in_creative_inventory=1,destroys_items=1, set_on_fire=15, fire_damage=1, liquid=1},
 	walkable = false,
 	pointable = false,
 	diggable = false,
@@ -85,6 +89,8 @@ minetest.register_node("df_underworld_items:pit_plasma_flowing", {
 	is_ground_content = false,
 	light_source = minetest.LIGHT_MAX,
 	paramtype = "light",
+	_mcl_blast_resistance = 3600000,
+	_mcl_hardness = -1,
 })
 
 if minetest.get_modpath("radiant_damage") and radiant_damage.override_radiant_damage then
@@ -127,7 +133,7 @@ if df_underworld_items.config.destructive_pit_plasma then
 	minetest.register_abm({
 		label = "glowing pit matter degradation",
 		nodenames = {"group:pit_plasma"},
-		neighbors = df_underworld_items.abm_neighbors.pit_plasma,
+		neighbors = df_dependencies.abm_pit_plasma_neighbors,
 		interval = 2,
 		chance = 30,
 		catch_up = false,
@@ -144,7 +150,7 @@ if df_underworld_items.config.destructive_pit_plasma then
 								if math.random() < 0.66 then
 									minetest.set_node(test_pos, {name="df_underworld_items:glow_amethyst"})
 								else
-									minetest.set_node(test_pos, {name="default:lava_source"})
+									minetest.set_node(test_pos, {name=lava_source})
 								end
 							else
 								minetest.set_node(test_pos, {name="air"})

df_underworld_items/hunter_statue.lua

@@ -1,6 +1,6 @@
 if minetest.get_modpath("hunter_statue") and df_underworld_items.config.underworld_hunter_statues then
 
-	local S = df_underworld_items.S
+	local S = minetest.get_translator(minetest.get_current_modname())
 
 	hunter_statue.register_hunter_statue("df_underworld_items:hunter_statue", {
 		description = S("Guardian Statue"),
@@ -13,6 +13,9 @@ if minetest.get_modpath("hunter_statue") and df_underworld_items.config.underwor
 		tnt_vulnerable = true,
 		tnt_debris = "df_underworld_items:slade_sand",
 		groups = {hunter_statue = 1, falling_node = 1, immortal = 1},
+		hunters_allowed_here = function(pos)
+			return not minetest.find_node_near(pos, 6, "df_underworld_items:ancient_lantern_slade", true)
+		end,
 		other_overrides = {
 			can_dig = function(pos, player)
 				if player then

df_underworld_items/init.lua

@@ -1,11 +1,9 @@
 df_underworld_items = {}
 
 local modname = minetest.get_current_modname()
-df_underworld_items.S = minetest.get_translator(modname)
 local modpath = minetest.get_modpath(modname)
 
 dofile(modpath.."/config.lua")
-dofile(modpath.."/dependencies.lua")
 dofile(modpath.."/doc.lua")
 
 dofile(modpath.."/crystals_amethyst.lua")
@@ -14,4 +12,9 @@ dofile(modpath.."/slade.lua")
 dofile(modpath.."/hunter_statue.lua")
 dofile(modpath.."/glowing_pit_plasma.lua")
 
-dofile(modpath.."/puzzle_seal.lua")
+dofile(modpath.."/puzzle_seal.lua")
+dofile(modpath.."/puzzle_chest.lua")
+dofile(modpath.."/ancient_lanterns.lua")
+if df_underworld_items.config.enable_slade_drill then
+	dofile(modpath.."/slade_drill.lua")
+end

df_underworld_items/locale/df_underworld_items.de.tr

@@ -1,6 +1,10 @@
 # textdomain: df_underworld_items
 
 
+### ancient_lanterns.lua ###
+
+Ancient Lantern=
+
 ### crystals_amethyst.lua ###
 
 #WARNING: AUTOTRANSLATED BY GOOGLE TRANSLATE
@@ -38,6 +42,10 @@ These stones are highly volatile and should not be disturbed.=Diese Steine ​
 #WARNING: AUTOTRANSLATED BY GOOGLE TRANSLATE
 This block of Slade, carved by an unknown hand, is engraved with mysterious symbols. Most of the engraving's meaning is lost to the mists of time but one frament in the oldest known language can be translated: "This place is not a place of honor."=Dieser von einer unbekannten Hand geschnitzte Slade-Block ist mit mysteriösen Symbolen versehen. Der größte Teil der Bedeutung der Gravur geht den Nebeln der Zeit verloren, aber ein Frament in der ältesten bekannten Sprache kann übersetzt werden: "Dieser Ort ist kein Ehrenplatz."
 
+This shard of a spent slade breacher doesn't appear to have been intended as a portable tool, but it can be used as one.=
+
+Use this on a target to unleash the energies used to dig through the foundations of the world.=
+
 
 ### glow_stone.lua ###
 
@@ -54,6 +62,10 @@ Glowing Pit Plasma=Glühendes Grubenplasma
 #WARNING: AUTOTRANSLATED BY GOOGLE TRANSLATE
 Guardian Statue=Wächterstatue
 
+### puzzle_chest.lua ###
+
+Puzzle Chest=
+
 ### puzzle_seal.lua ###
 
 #WARNING: AUTOTRANSLATED BY GOOGLE TRANSLATE
@@ -62,10 +74,6 @@ Active Slade Breacher=Aktiver Slade Breacher
 Breach in the Slade=Brich den Slade ein
 #WARNING: AUTOTRANSLATED BY GOOGLE TRANSLATE
 Inscribed Slade Block=Beschrifteter Slade-Block
-#WARNING: AUTOTRANSLATED BY GOOGLE TRANSLATE
-Slade Block Slab=Slade Block Platte
-#WARNING: AUTOTRANSLATED BY GOOGLE TRANSLATE
-Slade Block Stair=Slade Block Treppe
 Slade Capstone=
 Slade Puzzle Seal=
 #WARNING: AUTOTRANSLATED BY GOOGLE TRANSLATE
@@ -78,7 +86,18 @@ Slade Block=
 Slade Brick=
 Slade Sand=
 Slade Seal=
+Slade Wall=
+
+### slade_drill.lua ###
+
+Slade Drill=
+
+
+##### not used anymore #####
+
+#WARNING: AUTOTRANSLATED BY GOOGLE TRANSLATE
+Slade Block Slab=Slade Block Platte
+#WARNING: AUTOTRANSLATED BY GOOGLE TRANSLATE
+Slade Block Stair=Slade Block Treppe
 #WARNING: AUTOTRANSLATED BY GOOGLE TRANSLATE
 Slade Slab=Slade-Platte
-Slade Stair=
-Slade Wall=

df_underworld_items/locale/df_underworld_items.it.tr

@@ -1,6 +1,10 @@
 # textdomain: df_underworld_items
 
 
+### ancient_lanterns.lua ###
+
+Ancient Lantern=
+
 ### crystals_amethyst.lua ###
 
 #WARNING: AUTOTRANSLATED BY GOOGLE TRANSLATE
@@ -38,6 +42,10 @@ These stones are highly volatile and should not be disturbed.=Queste pietre sono
 #WARNING: AUTOTRANSLATED BY GOOGLE TRANSLATE
 This block of Slade, carved by an unknown hand, is engraved with mysterious symbols. Most of the engraving's meaning is lost to the mists of time but one frament in the oldest known language can be translated: "This place is not a place of honor."=Questo blocco di Slade, scolpito da una mano sconosciuta, è inciso con simboli misteriosi. La maggior parte del significato dell'incisione si perde nella notte dei tempi, ma un frammento nella più antica lingua conosciuta può essere tradotto: "Questo posto non è un posto d'onore".
 
+This shard of a spent slade breacher doesn't appear to have been intended as a portable tool, but it can be used as one.=
+
+Use this on a target to unleash the energies used to dig through the foundations of the world.=
+
 
 ### glow_stone.lua ###
 
@@ -52,6 +60,10 @@ Glowing Pit Plasma=
 #WARNING: AUTOTRANSLATED BY GOOGLE TRANSLATE
 Guardian Statue=Statua del guardiano
 
+### puzzle_chest.lua ###
+
+Puzzle Chest=
+
 ### puzzle_seal.lua ###
 
 #WARNING: AUTOTRANSLATED BY GOOGLE TRANSLATE
@@ -60,8 +72,6 @@ Active Slade Breacher=Attivo Slade Breacher
 Breach in the Slade=Violazione nello Slade
 #WARNING: AUTOTRANSLATED BY GOOGLE TRANSLATE
 Inscribed Slade Block=Inscritto Slade Block
-Slade Block Slab=
-Slade Block Stair=
 Slade Capstone=
 Slade Puzzle Seal=
 Turn=
@@ -74,6 +84,8 @@ Slade Brick=
 Slade Sand=
 #WARNING: AUTOTRANSLATED BY GOOGLE TRANSLATE
 Slade Seal=Sigillo Slade
-Slade Slab=
-Slade Stair=
 Slade Wall=
+
+### slade_drill.lua ###
+
+Slade Drill=

df_underworld_items/locale/template.txt

@@ -1,6 +1,10 @@
 # textdomain: df_underworld_items
 
 
+### ancient_lanterns.lua ###
+
+Ancient Lantern=
+
 ### crystals_amethyst.lua ###
 
 Glowing Amethyst Block=
@@ -27,6 +31,10 @@ These stones are highly volatile and should not be disturbed.=
 
 This block of Slade, carved by an unknown hand, is engraved with mysterious symbols. Most of the engraving's meaning is lost to the mists of time but one frament in the oldest known language can be translated: "This place is not a place of honor."=
 
+This shard of a spent slade breacher doesn't appear to have been intended as a portable tool, but it can be used as one.=
+
+Use this on a target to unleash the energies used to dig through the foundations of the world.=
+
 
 ### glow_stone.lua ###
 
@@ -40,13 +48,15 @@ Glowing Pit Plasma=
 
 Guardian Statue=
 
+### puzzle_chest.lua ###
+
+Puzzle Chest=
+
 ### puzzle_seal.lua ###
 
 Active Slade Breacher=
 Breach in the Slade=
 Inscribed Slade Block=
-Slade Block Slab=
-Slade Block Stair=
 Slade Capstone=
 Slade Puzzle Seal=
 Turn=
@@ -58,6 +68,8 @@ Slade Block=
 Slade Brick=
 Slade Sand=
 Slade Seal=
-Slade Slab=
-Slade Stair=
 Slade Wall=
+
+### slade_drill.lua ###
+
+Slade Drill=

df_underworld_items/mod.conf

@@ -1,4 +1,4 @@
 name = df_underworld_items
 description = Various node types used by the dfcaverns mapgen mod for its underworld layer.
-depends = default
-optional_depends = doc, radiant_damage, mesecons_mvps, tnt, stairs, hunter_statue
+depends = df_dependencies
+optional_depends = doc, radiant_damage, mesecons_mvps, hunter_statue

df_underworld_items/models/LICENSE.txt

@@ -0,0 +1,142 @@
+dfcaverns_open_chest.obj is copied from minetest_game's default mod, whose media license doesn't specify who in particular created it. The media license for the default mod is as follows:
+
+Licenses of media (textures, models and sounds)
+-----------------------------------------------
+
+Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0)
+Copyright (C) 2010-2018:
+
+  celeron55, Perttu Ahola <celeron55@gmail.com>
+  Cisoun
+  G4JC
+  VanessaE
+  RealBadAngel
+  Calinou
+  MirceaKitsune
+  Jordach
+  PilzAdam
+  jojoa1997
+  InfinityProject
+  Splizard
+  Zeg9
+  paramat
+  BlockMen
+  sofar
+  Neuromancer
+  Gambit
+  asl97
+  KevDoy
+  Mito551
+  GreenXenith
+  kaeza
+  kilbith
+  tobyplowy
+  CloudyProton
+  TumeniNodes
+  Mossmanikin
+  random-geek
+  Extex101
+  An0n3m0us
+
+You are free to:
+Share — copy and redistribute the material in any medium or format.
+Adapt — remix, transform, and build upon the material for any purpose, even commercially.
+The licensor cannot revoke these freedoms as long as you follow the license terms.
+
+Under the following terms:
+
+Attribution — You must give appropriate credit, provide a link to the license, and
+indicate if changes were made. You may do so in any reasonable manner, but not in any way
+that suggests the licensor endorses you or your use.
+
+ShareAlike — If you remix, transform, or build upon the material, you must distribute
+your contributions under the same license as the original.
+
+No additional restrictions — You may not apply legal terms or technological measures that
+legally restrict others from doing anything the license permits.
+
+Notices:
+
+You do not have to comply with the license for elements of the material in the public
+domain or where your use is permitted by an applicable exception or limitation.
+No warranties are given. The license may not give you all of the permissions necessary
+for your intended use. For example, other rights such as publicity, privacy, or moral
+rights may limit how you use the material.
+
+For more details:
+http://creativecommons.org/licenses/by-sa/3.0/
+
+-----------------------
+
+Attribution 3.0 Unported (CC BY 3.0)
+
+Copyright (C) 2009 cmusounddesign
+Copyright (C) 2010 Tomlija
+Copyright (C) 2010 lsprice
+Copyright (C) 2014 sonictechtonic
+Copyright (C) 2015 yadronoff
+Copyright (C) 2007 HerbertBoland
+Copyright (C) 2006 AGFX
+
+You are free to:
+Share — copy and redistribute the material in any medium or format.
+Adapt — remix, transform, and build upon the material for any purpose, even commercially.
+The licensor cannot revoke these freedoms as long as you follow the license terms.
+
+Under the following terms:
+
+Attribution — You must give appropriate credit, provide a link to the license, and
+indicate if changes were made. You may do so in any reasonable manner, but not in any way
+that suggests the licensor endorses you or your use.
+
+No additional restrictions — You may not apply legal terms or technological measures that
+legally restrict others from doing anything the license permits.
+
+Notices:
+
+You do not have to comply with the license for elements of the material in the public
+domain or where your use is permitted by an applicable exception or limitation.
+No warranties are given. The license may not give you all of the permissions necessary
+for your intended use. For example, other rights such as publicity, privacy, or moral
+rights may limit how you use the material.
+
+For more details:
+http://creativecommons.org/licenses/by/3.0/
+
+-----------------------
+
+CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
+
+Iwan Gabovitch
+Ottomaani138
+Ogrebane
+blukotek
+Sevin7
+Yoyodaman234
+Ryding
+
+No Copyright
+
+The person who associated a work with this deed has dedicated the work to the
+public domain by waiving all of his or her rights to the work worldwide under
+copyright law, including all related and neighboring rights, to the extent
+allowed by law.
+
+You can copy, modify, distribute and perform the work, even for commercial
+purposes, all without asking permission. See Other Information below.
+
+Other Information:
+
+In no way are the patent or trademark rights of any person affected by CC0, nor
+are the rights that other persons may have in the work or in how the work is
+used, such as publicity or privacy rights.
+
+Unless expressly stated otherwise, the person who associated a work with this
+deed makes no warranties about the work, and disclaims liability for all uses
+of the work, to the fullest extent permitted by applicable law.
+
+When using or citing the work, you should not imply endorsement by the author
+or the affirmer.
+
+For more details:
+https://creativecommons.org/publicdomain/zero/1.0/

df_underworld_items/models/dfcaverns_chest_open.obj

@@ -0,0 +1,79 @@
+# Blender v2.78 (sub 0) OBJ File: 'chest-open.blend'
+# www.blender.org
+o Top_Cube.002_None_Top_Cube.002_None_bottom
+v -0.500000 0.408471 0.720970
+v -0.500000 1.115578 0.013863
+v -0.500000 0.894607 -0.207108
+v -0.500000 0.187501 0.499999
+v 0.500000 1.115578 0.013863
+v 0.500000 0.408471 0.720970
+v 0.500000 0.187501 0.499999
+v 0.500000 0.894607 -0.207108
+v -0.500000 0.187500 -0.500000
+v -0.500000 -0.500000 -0.500000
+v -0.500000 -0.500000 0.500000
+v 0.500000 0.187500 -0.500000
+v 0.500000 -0.500000 0.500000
+v 0.500000 -0.500000 -0.500000
+vt 0.0000 1.0000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vt 0.0000 1.0000
+vt 0.0000 0.0000
+vt 0.0000 1.0000
+vt 1.0000 1.0000
+vt 1.0000 0.6875
+vt 0.0000 0.6875
+vt 1.0000 1.0000
+vt 0.0000 0.6875
+vt 1.0000 0.6875
+vt 1.0000 0.6875
+vt 1.0000 0.0000
+vt 0.0000 0.0000
+vt 1.0000 0.6875
+vt 1.0000 0.0000
+vt 1.0000 1.0000
+vt 1.0000 0.6875
+vt 1.0000 0.0000
+vt 0.0000 1.0000
+vt 0.0000 0.6875
+vt 0.0000 0.6875
+vt 0.0000 0.0000
+vt 1.0000 0.5000
+vt 1.0000 1.0000
+vt 0.0000 1.0000
+vt 0.0000 0.5000
+vt 0.0000 0.0000
+vt 1.0000 0.0000
+vn 0.0000 0.7071 0.7071
+vn -0.0000 -1.0000 -0.0000
+vn -1.0000 0.0000 0.0000
+vn 1.0000 0.0000 -0.0000
+vn 0.0000 -0.7071 0.7071
+vn 0.0000 0.0000 1.0000
+vn -0.0000 0.7071 -0.7071
+vn -0.0000 0.0000 -1.0000
+vn -0.0000 -0.7071 -0.7071
+vn -0.0000 1.0000 -0.0000
+g Top_Cube.002_None_Top_Cube.002_None_bottom_Top_Cube.002_None_Top_Cube.002_None_bottom_Top
+s off
+f 6/1/1 5/2/1 2/3/1 1/4/1
+g Top_Cube.002_None_Top_Cube.002_None_bottom_Top_Cube.002_None_Top_Cube.002_None_bottom_Bottom
+f 11/5/2 10/6/2 14/7/2 13/8/2
+g Top_Cube.002_None_Top_Cube.002_None_bottom_Top_Cube.002_None_Top_Cube.002_None_bottom_Right-Left
+f 1/9/3 2/10/3 3/11/3 4/12/3
+f 5/13/4 6/1/4 7/14/4 8/15/4
+f 4/12/3 9/16/3 10/17/3 11/18/3
+f 12/19/4 7/14/4 13/8/4 14/20/4
+g Top_Cube.002_None_Top_Cube.002_None_bottom_Top_Cube.002_None_Top_Cube.002_None_bottom_Back
+f 6/21/5 1/9/5 4/12/5 7/22/5
+f 7/22/6 4/12/6 11/18/6 13/23/6
+g Top_Cube.002_None_Top_Cube.002_None_bottom_Top_Cube.002_None_Top_Cube.002_None_bottom_Front
+f 2/10/7 5/24/7 8/25/7 3/11/7
+f 9/16/8 12/26/8 14/27/8 10/17/8
+g Top_Cube.002_None_Top_Cube.002_None_bottom_Top_Cube.002_None_Top_Cube.002_None_bottom_Inside
+f 4/28/9 3/29/9 8/30/9 7/31/9
+f 7/31/10 12/32/10 9/33/10 4/28/10

df_underworld_items/puzzle_chest.lua

@@ -0,0 +1,172 @@
+local S = minetest.get_translator(minetest.get_current_modname())
+
+local sum_square = function(input)
+	return {input[1] + input[2], input[3] + input[4], input[1] + input[3], input[2] + input[4]}
+end
+
+local initialize = function(pos, meta)
+	if not meta:contains("key") then
+		local inv = meta:get_inventory()
+		inv:set_size("main", 8)		
+		local next_seed = math.random() * 2^21
+		math.randomseed(pos.x + pos.y^8 + pos.z^16)
+		-- Key is consistent with location
+		local key = {math.random(0,7), math.random(0,7), math.random(0,7), math.random(0,7)}
+		math.randomseed(next_seed)
+		local state = {math.random(0,7), math.random(0,7), math.random(0,7), math.random(0,7)}
+		local key_sum = sum_square(key)
+		local state_sum = sum_square(state)
+		if (key_sum[1] == state_sum[1] and key_sum[2] == state_sum[2] and key_sum[3] == state_sum[3] and key_sum[4] == state_sum[4]) then
+			-- if we randomly start off solved change one of the states to make it unsolved.
+			-- lucky player gets an easy one.
+			state[1] = (state[1] + 1) % 8
+		end
+		meta:set_string("key", minetest.serialize(key))
+		meta:set_string("state", minetest.serialize(state))
+		meta:mark_as_private("key")
+		meta:mark_as_private("state") -- not really necessary, but for consistency
+	end
+end
+
+-- 1 2
+-- 3 4
+
+local formspec_dial = function(identifier, state)
+	return "image[0.5,0;2,1;dfcaverns_chest_dial_"..tostring(state)..".png]"
+		.. "button[0,0.25;0.5,0.5;"..identifier.."+;<]"
+		.. "button[2.5,0.25;0.5,0.5;"..identifier.."-;>]"
+end
+
+local formspec_bar = function(horizontal, state, key)
+	if horizontal then
+		return "box[0,0;".. tostring(key/14 * 2 + 0.1) ..",1;#222222ff]box[0.1,0.1;".. tostring(state/14 * 2)..",0.85;#ff00ff44]"
+	end
+	return "box[0,0;1,".. tostring(key/14 * 2 + 0.1) ..";#222222ff]box[0.1,0.1;0.85,".. tostring(state/14 * 2)..";#ff00ff44]"
+end
+
+local prefix = "df_underworld_items:puzzle_chest"
+local prefix_len = string.len("df_underworld_items:puzzle_chest")
+
+local itemslot_bg = df_dependencies.get_itemslot_bg_padded
+
+local show_formspec = function(pos, node, clicker, itemstack, pointed_thing)
+	local meta = minetest.get_meta(pos)
+	initialize(pos, meta)
+	local key = minetest.deserialize(meta:get_string("key"))
+	local state = minetest.deserialize(meta:get_string("state"))
+	local key_sum = sum_square(key)
+	local state_sum = sum_square(state)
+	local solved = key_sum[1] == state_sum[1] and key_sum[2] == state_sum[2] and key_sum[3] == state_sum[3] and key_sum[4] == state_sum[4]
+	local playername = clicker:get_player_name()
+	local formname = prefix .. minetest.pos_to_string(pos)
+	local formspec = "formspec_version[6]"
+		.. "size[11,12]"
+		.. "container[1.5,0.5]"
+		.. "container[0,0]" .. formspec_dial("dial1", state[1]) .. "container_end[]"
+		.. "container[3,0]" .. formspec_dial("dial2", state[2]) .. "container_end[]"
+		.. "container[0,1.5]" .. formspec_dial("dial3", state[3]) .. "container_end[]"
+		.. "container[3,1.5]" .. formspec_dial("dial4", state[4]) .. "container_end[]"
+		.. "container[6.1,0]" .. formspec_bar(true, state_sum[1], key_sum[1]) .. "container_end[]"		
+		.. "container[6.1,1.5]" .. formspec_bar(true, state_sum[2], key_sum[2]) .. "container_end[]"		
+		.. "container[1,2.75]" .. formspec_bar(false, state_sum[3], key_sum[3]) .. "container_end[]"		
+		.. "container[4,2.75]" .. formspec_bar(false, state_sum[4], key_sum[4]) .. "container_end[]"
+		.. "container_end[]"
+		.. itemslot_bg(0.6,6.7,8,4,0.25)
+		.. "list[current_player;main;0.6,6.7;8,4;]"
+	if solved then
+		local nodemeta = "nodemeta:"..pos.x..","..pos.y..","..pos.z
+		formspec = formspec
+			.. itemslot_bg(0.6,5.4,8,1,0.25)
+			.. "list["..nodemeta..";main;0.6,5.4;8,1;]"
+			.. "listring[]"
+		if meta:get_string("solved") ~= "true" then
+			minetest.sound_play("dfcaverns_puzzle_chest_open", {pos = pos})
+			meta:set_string("solved", "true")
+			local old_node = minetest.get_node(pos)
+			minetest.swap_node(pos, {name="df_underworld_items:puzzle_chest_opened", param2=old_node.param2})
+		end
+	elseif meta:get_string("solved") == "true" then
+		minetest.sound_play("dfcaverns_puzzle_chest_close", {pos = pos})
+		meta:set_string("solved", "")
+		local old_node = minetest.get_node(pos)
+		minetest.swap_node(pos, {name="df_underworld_items:puzzle_chest_closed", param2=old_node.param2})
+	end
+
+	minetest.show_formspec(playername, formname, formspec)
+end
+
+minetest.register_on_player_receive_fields(function(player, formname, fields)
+	if string.sub(formname, 1, prefix_len) ~= prefix then return end
+	if fields.quit then return end
+	local pos = minetest.string_to_pos(string.sub(formname, prefix_len+1, -1))
+	local meta = minetest.get_meta(pos)
+	local state = minetest.deserialize(meta:get_string("state"))
+	for i = 1,4 do
+		if fields["dial"..tostring(i).."+"] then
+			state[i] = (state[i] + 1) % 8
+			break
+		elseif fields["dial"..tostring(i).."-"] then
+			state[i] = (state[i] - 1) % 8
+			break
+		end
+	end
+	meta:set_string("state", minetest.serialize(state))
+	show_formspec(pos, nil, player)
+end)
+
+local puzzle_chest_can_dig = function(pos, player)
+	local meta = minetest.get_meta(pos)
+	initialize(pos, meta)
+	local inv = meta:get_inventory()
+	return inv:is_empty("main")
+end
+
+minetest.register_node("df_underworld_items:puzzle_chest_closed", {
+	description = S("Puzzle Chest"),
+	_doc_items_longdesc = df_underworld_items.doc.puzzle_chest_desc,
+	_doc_items_usagehelp = df_underworld_items.doc.puzzle_chest_usage,
+	tiles = {
+		"dfcaverns_slade_block.png^dfcaverns_chest_mask_top.png",
+		"dfcaverns_slade_block.png^dfcaverns_chest_mask_top.png",
+		"dfcaverns_slade_block.png^dfcaverns_chest_mask_side.png",
+		"dfcaverns_slade_block.png^dfcaverns_chest_mask_side.png",
+		"dfcaverns_slade_block.png^dfcaverns_chest_mask_side.png",
+		"dfcaverns_slade_block.png^dfcaverns_chest_mask_side.png^dfcaverns_chest_lock_plate.png^dfcaverns_chest_lock_colours.png",
+	},
+	paramtype2="facedir",
+	is_ground_content = false,
+	groups = {stone=1, slade=1, pit_plasma_resistant=1, mese_radiation_shield=1, cracky = 3, building_block=1, material_stone=1},
+	sounds = df_dependencies.sound_stone({ footstep = { name = "bedrock2_step", gain = 1 } }),
+	_mcl_blast_resistance = 1200,
+	_mcl_hardness = 50,
+	
+	on_rightclick = show_formspec,
+	can_dig = puzzle_chest_can_dig,
+})
+
+minetest.register_node("df_underworld_items:puzzle_chest_opened", {
+	description = S("Puzzle Chest"),
+	_doc_items_longdesc = df_underworld_items.doc.puzzle_chest_desc,
+	_doc_items_usagehelp = df_underworld_items.doc.puzzle_chest_usage,
+	tiles = {
+		{name = "dfcaverns_slade_block.png^dfcaverns_chest_mask_top.png", backface_culling = true},
+		{name = "dfcaverns_slade_block.png^dfcaverns_chest_mask_top.png", backface_culling = true},
+		{name = "dfcaverns_slade_block.png^dfcaverns_chest_mask_side.png", backface_culling = true},
+		{name = "dfcaverns_slade_block.png^dfcaverns_chest_mask_side.png", backface_culling = true},
+		{name = "dfcaverns_slade_block.png^dfcaverns_chest_mask_side.png^dfcaverns_chest_lock_plate.png^dfcaverns_chest_lock_colours.png", backface_culling = true},
+		{name = "([combine:16x32:0,0=dfcaverns_slade_block.png:0,16=dfcaverns_slade_block.png)^dfcaverns_chest_mask_interior.png", backface_culling = true},
+	},
+	is_ground_content = false,
+	mesh = "dfcaverns_chest_open.obj",
+	drawtype= "mesh",
+	visual = "mesh",
+	paramtype2="facedir",
+	groups = {stone=1, slade=1, pit_plasma_resistant=1, mese_radiation_shield=1, cracky = 3, building_block=1, material_stone=1, not_in_creative_inventory=1},
+	drop = "df_underworld_items:puzzle_chest_closed",
+	sounds = df_dependencies.sound_stone({ footstep = { name = "bedrock2_step", gain = 1 } }),
+	_mcl_blast_resistance = 1200,
+	_mcl_hardness = 50,
+	
+	on_rightclick = show_formspec,
+	can_dig = puzzle_chest_can_dig,
+})

df_underworld_items/puzzle_seal.lua

@@ -1,7 +1,11 @@
-local S = df_underworld_items.S
+local S = minetest.get_translator(minetest.get_current_modname())
 
 local named_waypoints_path = minetest.get_modpath("named_waypoints")
 
+-- override these to allow achievements to be recorded without requiring a dependency
+df_underworld_items.slade_breacher_triggered = function(pos, player) end
+df_underworld_items.puzzle_seal_solved = function(pos, player) end -- player can be nil
+
 local invulnerable = df_underworld_items.config.invulnerable_slade and not minetest.settings:get_bool("creative_mode")
 
 local can_dig
@@ -11,11 +15,16 @@ if invulnerable then
 	end
 end
 
-local slade_groups = {stone=1, level=3, slade=1, pit_plasma_resistant=1, mese_radiation_shield=1, cracky = 3, not_in_creative_inventory=1}
+local slade_mcl_blast_resistance = 1200
+local slade_mcl_hardness = 50
+local slade_groups = {stone=1, slade=1, pit_plasma_resistant=1, mese_radiation_shield=1, cracky = 3, not_in_creative_inventory=1,creative_breakable=1, building_block=1, material_stone=1}
 if invulnerable then
 	slade_groups.immortal = 1
+	slade_mcl_blast_resistance = 3600000
+	slade_mcl_hardness = -1
 end
 
+local lava_source = df_dependencies.node_name_lava_source
 
 -- Ensures that the node is functioning correctly
 local ensure_meta = function(pos)
@@ -39,33 +48,78 @@ local ensure_meta = function(pos)
 end
 
 local colour_groups = {
-	"color_black",	-- 0
-	"color_red",	-- 1
-	"color_orange",	-- 2
-	"color_yellow",	-- 3
-	"color_green",	-- 4
-	"color_blue",	-- 5
-	"color_violet",	-- 6
-	"color_white"}	-- 7
+	{"color_black", "basecolor_black", "excolor_black", "excolor_darkgrey", "color_dark_grey"},	-- 0
+	{"color_red", "basecolor_red", "excolor_red"},	-- 1
+	{"color_orange", "basecolor_orange", "excolor_orange"},	-- 2
+	{"color_yellow", "basecolor_yellow", "excolor_yellow"},	-- 3
+	{"color_green", "basecolor_green", "excolor_green", "excolor_lime", "color_dark_green"},	-- 4
+	{"color_blue", "basecolor_blue", "excolor_blue", "excolor_sky_blue"},	-- 5
+	{"color_violet", "excolor_violet",},	-- 6
+	{"color_white", "basecolor_white", "excolor_white", "excolor_lightgrey", "color_grey"},	-- 7
+}
 
-local test_key = function(pos)
+df_underworld_items.colour_items = {}
+
+local cull_colour_groups = function()
+	local culled_colour_groups = {}
+	for _, groups in ipairs(colour_groups) do
+		local new_set = {}
+		for _, colour_group in pairs(groups) do
+			for itemname, def in pairs(minetest.registered_items) do
+				if minetest.get_item_group(itemname, colour_group) ~= 0 then
+					table.insert(new_set, colour_group)
+					break
+				end
+			end
+		end
+		assert(#new_set > 0, "Unsolvable puzzle seals due to lack of any registered items belonging to one of " .. dump(groups))
+		table.insert(culled_colour_groups, new_set)
+	end
+	colour_groups = culled_colour_groups
+	
+	-- collect a list of all items with useful colour groups
+	-- to be used for treasure generation
+	local colour_item_set = {}
+	for itemname, def in pairs(minetest.registered_items) do
+		for _, groups in ipairs(colour_groups) do
+			for _, colour in ipairs(groups) do
+				if minetest.get_item_group(itemname, colour) ~= 0 then
+					colour_item_set[itemname] = true
+				end
+			end
+		end
+	end
+	for colour_item, _ in pairs(colour_item_set) do
+		table.insert(df_underworld_items.colour_items, colour_item)
+	end
+end
+minetest.after(0, cull_colour_groups)
+
+local item_represents_number = function(itemname, number)
+	for _, group in pairs(colour_groups[number+1]) do
+		if minetest.get_item_group(itemname, group) ~= 0 then
+			return true
+		end
+	end
+	return false
+end
+
+local test_key = function(pos, player)
     local meta = minetest.get_meta(pos)
 	if not meta:contains("key") then
 		return false
 	end
-		
+	
 	local keystring = meta:get_string("key")
 	local key = minetest.deserialize(keystring)
 	local inv = meta:get_inventory()
-	
 	for offset = 0, 7 do
 		local valid
 		for i = 0, 7 do
 			valid = true
 			local keyval = (i + offset) % 8 + 1
-			local key_group = colour_groups[key[keyval]+1]
 			local item = inv:get_stack("main", i+1)
-			if minetest.get_item_group(item:get_name(), key_group) == 0 then
+			if not item_represents_number(item:get_name(), key[keyval]) then
 				valid = false
 				break
 			end
@@ -73,6 +127,7 @@ local test_key = function(pos)
 		if valid then
 			local unlocked = meta:get_int("unlocked")
 			if unlocked == 0 then
+				df_underworld_items.puzzle_seal_solved(pos, player)
 				meta:set_int("unlocked", 1)
 			end
 			return true
@@ -93,6 +148,7 @@ end
 --This place is best shunned and left uninhabited.
 
 local formspec_prefix = "df_underworld_items_puzzle_seal:"
+local itemslot_bg = df_dependencies.get_itemslot_bg
 local get_formspec = function(pos, unlocked)
 	local formspec = 
 		"size[8,8]"
@@ -100,13 +156,21 @@ local get_formspec = function(pos, unlocked)
 		.."image[5.8,0;2.5,4;dfcaverns_puzzle_inscription_background.png^[transformR180^dfcaverns_puzzle_inscription_2.png]"
 		.."container[2.25,0]"
 		.."list[nodemeta:"..pos.x..","..pos.y..","..pos.z..";main;0.25,0.25;1,1;0]"
+		..itemslot_bg(0.25,0.25,1,1)
 		.."list[nodemeta:"..pos.x..","..pos.y..","..pos.z..";main;1.25,0;1,1;1]"
+		..itemslot_bg(1.25,0,1,1)
 		.."list[nodemeta:"..pos.x..","..pos.y..","..pos.z..";main;2.25,0.25;1,1;2]"
+		..itemslot_bg(2.25,0.25,1,1)
 		.."list[nodemeta:"..pos.x..","..pos.y..","..pos.z..";main;2.5,1.25;1,1;3]"
+		..itemslot_bg(2.5,1.25,1,1)
 		.."list[nodemeta:"..pos.x..","..pos.y..","..pos.z..";main;2.25,2.25;1,1;4]"
+		..itemslot_bg(2.25,2.25,1,1)
 		.."list[nodemeta:"..pos.x..","..pos.y..","..pos.z..";main;1.25,2.5;1,1;5]"
+		..itemslot_bg(1.25,2.5,1,1)
 		.."list[nodemeta:"..pos.x..","..pos.y..","..pos.z..";main;0.25,2.25;1,1;6]"
+		..itemslot_bg(0.25,2.25,1,1)
 		.."list[nodemeta:"..pos.x..","..pos.y..","..pos.z..";main;0,1.25;1,1;7]"
+		..itemslot_bg(0,1.25,1,1)
 	if unlocked then
 		formspec = formspec .. "image_button[1.25,1.25;1,1;dfcaverns_seal.png;open;"..S("Turn").."]"
 	else
@@ -119,12 +183,15 @@ local get_formspec = function(pos, unlocked)
 --		.."box[0,0;1,5;#0A0000]box[0.1,0.1;0.8,4.8;#000000]box[0.1," .. 0.1 + 4.8*completion ..";0.8,".. 4.8*completion ..";#FFCC22]"
 --		.."container_end[]"
 		.."container[0,4]list[current_player;main;0,0;8,1;]listring[]"
-		.."list[current_player;main;0,1.25;8,3;8]container_end[]"
-	return formspec
+		..itemslot_bg(0,0,8,1)
+		.."list[current_player;main;0,1.25;8,3;8]"
+		..itemslot_bg(0,1.25,8,3)
+		.."container_end[]"
+		return formspec
 end
 local refresh_formspec = function(pos, player)
 	local player_name = player:get_player_name()
-	local unlocked = test_key(pos)
+	local unlocked = test_key(pos, player)
 	local formspec = get_formspec(pos, unlocked)
 	minetest.show_formspec(player_name, formspec_prefix..minetest.pos_to_string(pos), formspec)
 end
@@ -188,7 +255,7 @@ local puzzle_seal_def = {
 	paramtype2 = "facedir",
 	light_source = 8,
 	groups = slade_groups,
-	sounds = default.node_sound_stone_defaults({ footstep = { name = "bedrock2_step", gain = 1 } }),
+	sounds = df_dependencies.sound_stone({ footstep = { name = "bedrock2_step", gain = 1 } }),
 	selection_box = {
 		type = "fixed",
 		fixed = {-0.625, -0.625, -0.625, 0.625, 0.625, 0.625},
@@ -199,6 +266,8 @@ local puzzle_seal_def = {
 	},
 	is_ground_content = false,
 	can_dig = can_dig,
+	_mcl_blast_resistance = slade_mcl_blast_resistance,
+	_mcl_hardness = slade_mcl_hardness,
 	on_blast = function() end,
 	on_rotate = function() return false end,
 	on_construct = function(pos)
@@ -238,6 +307,8 @@ minetest.register_node("df_underworld_items:puzzle_seal", puzzle_seal_def)
 --------------------------------------------------------------------------------
 -- Once the seal is opened, it turns into this and digs its way down through the slade.
 
+local tnt_boom = df_dependencies.tnt_boom
+
 local digging_seal_def = {
 	description = S("Active Slade Breacher"),
 	_doc_items_longdesc = nil,
@@ -247,9 +318,9 @@ local digging_seal_def = {
 	tiles = {"dfcaverns_pit_plasma_static.png", "dfcaverns_pit_plasma_static.png^dfcaverns_seal.png", "dfcaverns_pit_plasma_static.png"},
 	paramtype = "light",
 	paramtype2 = "facedir",
-	light_source = default.LIGHT_MAX,
-	groups = {immortal=1, stone=1, level=3, slade=1, pit_plasma_resistant=1, mese_radiation_shield=1, not_in_creative_inventory=1},
-	sounds = default.node_sound_stone_defaults({ footstep = { name = "bedrock2_step", gain = 1 } }),
+	light_source = minetest.LIGHT_MAX,
+	groups = {immortal=1, stone=1, slade=1, pit_plasma_resistant=1, mese_radiation_shield=1, not_in_creative_inventory=1,building_block=1, material_stone=1},
+	sounds = df_dependencies.sound_stone({ footstep = { name = "bedrock2_step", gain = 1 } }),
 	selection_box = {
 		type = "fixed",
 		fixed = {-0.625, -0.625, -0.625, 0.625, 0.625, 0.625},
@@ -259,6 +330,8 @@ local digging_seal_def = {
 		fixed = {-0.625, -0.625, -0.625, 0.625, 0.625, 0.625},
 	},
 	is_ground_content = false,
+	_mcl_blast_resistance = 3600000,
+	_mcl_hardness = -1,
 	can_dig = can_dig,
 	on_blast = function() end,
 	on_rotate = function() return false end,
@@ -301,8 +374,15 @@ local digging_seal_def = {
 		})
 		
 		if minetest.get_item_group(below_node.name, "slade") == 0 then
-			tnt.boom({x=pos.x, y=pos.y-2, z=pos.z}, {radius=3})
-			minetest.set_node(pos, {name="default:lava_source"})
+			if df_underworld_items.config.enable_slade_drill then
+				minetest.set_node(pos, {name="air"})
+				if tnt_boom then
+					tnt_boom({x=pos.x, y=pos.y-2, z=pos.z}, {radius=3})
+				end
+				minetest.add_item(pos, "df_underworld_items:slade_drill")
+			else
+				minetest.set_node(pos, {name=lava_source})
+			end
 			return
 		end
 		
@@ -320,8 +400,10 @@ local digging_seal_def = {
 			minetest.place_schematic({x=pos.x-3, y=pos.y-2, z=pos.z-3}, df_underworld_items.seal_stair_schem, 270, {}, true)
 			node.param2 = 0
 		else
-			tnt.boom(pos, {radius=3})
-			minetest.set_node(pos, {name="default:lava_source"})
+			if tnt_boom then
+				tnt_boom(pos, {radius=3})
+			end
+			minetest.set_node(pos, {name=lava_source})
 			return
 		end
 		minetest.set_node(pos, {name="air"})
@@ -348,6 +430,7 @@ minetest.register_on_player_receive_fields(function(player, formname, fields)
 		minetest.set_node(pos, {name="df_underworld_items:digging_seal", param2 = math.random(1,4)-1})
 		minetest.get_node_timer(pos):start(4)
 		minetest.close_formspec(player:get_player_name(), formname)
+		df_underworld_items.slade_breacher_triggered(pos, player)
 	end
 end)
 
@@ -367,8 +450,10 @@ local inscription_block_def = {
 	},
 	paramtype2 = "facedir",
 	groups = slade_groups,
-	sounds = default.node_sound_stone_defaults({ footstep = { name = "bedrock2_step", gain = 1 } }),
+	sounds = df_dependencies.sound_stone({ footstep = { name = "bedrock2_step", gain = 1 } }),
 	is_ground_content = false,
+	_mcl_blast_resistance = slade_mcl_blast_resistance,
+	_mcl_hardness = slade_mcl_hardness,
 	can_dig = can_dig,
 	on_blast = function() end,
 	on_rotate = function() return false end,
@@ -405,8 +490,10 @@ local capstone_def = {
 	paramtype2 = "facedir",
 	groups = slade_groups,
 	light_source = 8,
-	sounds = default.node_sound_stone_defaults({ footstep = { name = "bedrock2_step", gain = 1 } }),
+	sounds = df_dependencies.sound_stone({ footstep = { name = "bedrock2_step", gain = 1 } }),
 	is_ground_content = false,
+	_mcl_blast_resistance = slade_mcl_blast_resistance,
+	_mcl_hardness = slade_mcl_hardness,
 	can_dig = can_dig,
 	on_blast = function() end,
 	on_rotate = function() return false end,
@@ -418,7 +505,6 @@ minetest.register_node("df_underworld_items:slade_capstone", capstone_def)
 -- Schematics
 
 local n1 = { name = "df_underworld_items:slade_block" }
-local n5 = { name = "default:meselamp" }
 local n6 = { name = "air", prob = 0 } -- ceiling pieces to leave in place
 local n8 = { name = "df_underworld_items:puzzle_seal" }
 local n3 = { name = "air"}
@@ -435,38 +521,33 @@ local n14 = { name = "df_underworld_items:inscription_block", param2 = 2 }
 local n15 = { name = "df_underworld_items:inscription_block", param2 = 3 }
 local n16 = { name = "df_underworld_items:slade_capstone"}
 
-if minetest.get_modpath("stairs") then
-	local stair_groups = {level = 3, mese_radiation_shield=1, pit_plasma_resistant=1, slade=1, cracky = 3}
-	if invulnerable then
-		stair_groups.immortal = 1
-	end
+df_dependencies.register_stairs("slade_block")
 
-	stairs.register_stair_and_slab(
-		"slade_block",
-		"df_underworld_items:slade_block",
-		stair_groups,
-		{"dfcaverns_slade_block.png"},
-		S("Slade Block Stair"),
-		S("Slade Block Slab"),
-		default.node_sound_stone_defaults({ footstep = { name = "bedrock2_step", gain = 1 } })
-	)
-	
-	if invulnerable then
-		for name, def in pairs(minetest.registered_nodes) do
-			if name:sub(1,7) == "stairs:" and name:sub(-11) == "slade_block" then
+if invulnerable then
+	for name, def in pairs(minetest.registered_nodes) do
+		if (name:sub(1,7) == "stairs:" and name:sub(-11) == "slade_block") or 
+			name:sub(1,11) == "mcl_stairs:" and name:sub(-11) == "slade_block" then
 				minetest.override_item(name, {can_dig = can_dig})
-			end
 		end
 	end
-	
-	n2 = { name = "stairs:stair_slade_block", param2 = 3 }
-	n4 = { name = "stairs:stair_slade_block", param2 = 1 }
-	n7 = { name = "stairs:stair_slade_block", param2 = 2 }
-	n9 = { name = "stairs:stair_slade_block" }
-	n10 = { name = "stairs:slab_slade_block", param2 = 21 }
-	n11 = { name = "stairs:slab_slade_block", param2 = 1 }
 end
 
+if df_dependencies.node_name_stair_slade_block then
+	n2 = { name = df_dependencies.node_name_stair_slade_block, param2 = 3 }
+	n4 = { name = df_dependencies.node_name_stair_slade_block, param2 = 1 }
+	n7 = { name = df_dependencies.node_name_stair_slade_block, param2 = 2 }
+	n9 = { name = df_dependencies.node_name_stair_slade_block }
+	n11 = { name = df_dependencies.node_name_slab_slade_block, param2 = 1 }
+	n10 = { name = df_dependencies.node_name_slab_slade_block, param2 = 21 }
+
+	if df_dependencies.node_name_slab_slade_block_top then	
+	-- Mineclone slabs don't support full rotation, this is how to flip them over
+		n10.name = df_dependencies.node_name_slab_slade_block_top
+		n10.param2 = 1
+	end
+end
+
+
 df_underworld_items.seal_temple_schem = {
 	size = {y = 6, x = 7, z = 7},
 	data = {

df_underworld_items/settingtypes.txt

@@ -1,3 +1,4 @@
 dfcaverns_invulnerable_slade (Slade cannot be damaged) bool true
 dfcaverns_destructive_pit_plasma (Pit plasma destroys adjacent nodes) bool true
-dfcaverns_underworld_hunter_statues (Enable hunter statues in the underworld) bool true
+dfcaverns_underworld_hunter_statues (Enable hunter statues in the underworld) bool true
+dfcaverns_enable_slade_drill (Enable slade drills) bool true

df_underworld_items/slade.lua

@@ -1,4 +1,4 @@
-local S = df_underworld_items.S
+local S = minetest.get_translator(minetest.get_current_modname())
 
 local invulnerable = df_underworld_items.config.invulnerable_slade and not minetest.settings:get_bool("creative_mode")
 
@@ -15,16 +15,20 @@ local add_immortality = function(slade_def)
 	return slade_def
 end
 
+local slade_groups = {cracky=3, stone=1, slade=1, pit_plasma_resistant=1, mese_radiation_shield=1,creative_breakable=1, building_block=1, material_stone=1}
+
 local slade_def = {
 	description = S("Slade"),
 	_doc_items_longdesc = df_underworld_items.doc.slade_desc,
 	_doc_items_usagehelp = df_underworld_items.doc.slade_usage,
 	tiles = {"dfcaverns_slade.png"},
-	groups = {cracky=3, stone=1, level=3, slade=1, pit_plasma_resistant=1, mese_radiation_shield=1},
-	sounds = default.node_sound_stone_defaults({ footstep = { name = "bedrock2_step", gain = 1 } }),
+	groups = slade_groups,
+	sounds = df_dependencies.sound_stone({ footstep = { name = "bedrock2_step", gain = 1 } }),
 	is_ground_content = false,
+	_mcl_blast_resistance = 8,
+	_mcl_hardness = 5,
 	on_blast = function(pos, intensity)
-		if intensity > 3.0 then
+		if intensity >= 1.0 then
 			minetest.set_node(pos, {name="df_underworld_items:slade_sand"})
 			minetest.check_for_falling(pos)
 		end
@@ -32,6 +36,8 @@ local slade_def = {
 }
 if invulnerable then
 	add_immortality(slade_def)
+	slade_def._mcl_blast_resistance = 8
+	slade_def._mcl_hardness = 5
 end
 minetest.register_node("df_underworld_items:slade", slade_def)
 
@@ -40,15 +46,23 @@ local slade_brick_def = {
 	_doc_items_longdesc = df_underworld_items.doc.slade_desc,
 	_doc_items_usagehelp = df_underworld_items.doc.slade_usage,
 	tiles = {"dfcaverns_slade_brick.png"},
-	groups = { cracky=3, stone=1, level=3, slade=1, pit_plasma_resistant=1, mese_radiation_shield=1},
-	sounds = default.node_sound_stone_defaults({ footstep = { name = "bedrock2_step", gain = 1 } }),
+	groups = slade_groups,
+	sounds = df_dependencies.sound_stone({ footstep = { name = "bedrock2_step", gain = 1 } }),
 	is_ground_content = false,
+	_mcl_blast_resistance = 8,
+	_mcl_hardness = 5,
 }
 if invulnerable then
 	add_immortality(slade_brick_def)
 end
 minetest.register_node("df_underworld_items:slade_brick", slade_brick_def)
 
+-- can't use "wall=1" because MCL has special handling for nodes in that group that explodes if it tries handling this one.
+-- fortunately minetest_game walls also connect to group fence, so this should be fine.
+local slade_wall_groups = {fence=1}
+for key, val in pairs(slade_groups) do
+	slade_wall_groups[key]=val
+end
 local slade_wall_def = {
 	description = S("Slade Wall"),
 	drawtype = "nodebox",
@@ -66,25 +80,26 @@ local slade_wall_def = {
 	tiles = {"dfcaverns_slade_brick.png"},
 	walkable = true,
 	is_ground_content = false,
-	groups = { cracky=3, stone=1, level=3, slade=1, pit_plasma_resistant=1, mese_radiation_shield=1},
-	sounds = default.node_sound_stone_defaults({ footstep = { name = "bedrock2_step", gain = 1 } }),
+	groups = slade_wall_groups,
+	sounds = df_dependencies.sound_stone({ footstep = { name = "bedrock2_step", gain = 1 } }),
+	_mcl_blast_resistance = 8,
+	_mcl_hardness = 5,
 }
 if invulnerable then
 	add_immortality(slade_wall_def)
 end
 minetest.register_node("df_underworld_items:slade_wall", slade_wall_def)
 
-
 minetest.register_node("df_underworld_items:slade_sand", {
 	description = S("Slade Sand"),
 	_doc_items_longdesc = df_underworld_items.doc.slade_desc,
 	_doc_items_usagehelp = df_underworld_items.doc.slade_usage,
 	tiles = {"dfcaverns_slade_sand.png"},
 	is_ground_content = false,
-	groups = {crumbly = 3, level = 2, falling_node = 1, slade=1, pit_plasma_resistant=1, mese_radiation_shield=1},
-	sounds = default.node_sound_gravel_defaults({
-		footstep = {name = "default_gravel_footstep", gain = 0.45},
-	}),
+	groups = {crumbly = 3, falling_node = 1, slade=1, pit_plasma_resistant=1, mese_radiation_shield=1,handy=1,shovely=3, sand=1, enderman_takable=1, building_block=1, material_sand=1, crush_after_fall=1, falling_node_damage=1},
+	sounds = df_dependencies.sound_gravel({footstep = {name = df_dependencies.soundfile_gravel_footstep, gain = 0.45},}),
+	_mcl_blast_resistance = 8,
+	_mcl_hardness = 3,
 })
 
 local slade_block_def = {
@@ -92,9 +107,11 @@ local slade_block_def = {
 	_doc_items_longdesc = df_underworld_items.doc.slade_desc,
 	_doc_items_usagehelp = df_underworld_items.doc.slade_usage,
 	tiles = {"dfcaverns_slade_block.png"},
-	groups = {cracky=3, stone=1, level=3, slade=1, pit_plasma_resistant=1, mese_radiation_shield=1},
-	sounds = default.node_sound_stone_defaults({ footstep = { name = "bedrock2_step", gain = 1 } }),
+	groups = slade_groups,
+	sounds = df_dependencies.sound_stone({ footstep = { name = "bedrock2_step", gain = 1 } }),
 	is_ground_content = false,
+	_mcl_blast_resistance = 1200,
+	_mcl_hardness = 50,
 }
 if invulnerable then
 	add_immortality(slade_block_def)
@@ -108,9 +125,11 @@ local slade_seal_def = {
 	_doc_items_longdesc = df_underworld_items.doc.slade_seal_desc,
 	_doc_items_usagehelp = df_underworld_items.doc.slade_usage,
 	tiles = {"dfcaverns_slade_block.png^dfcaverns_seal.png", "dfcaverns_slade_block.png"},
-	groups = {cracky=3, stone=1, level=3, slade=1, pit_plasma_resistant=1, mese_radiation_shield=1},
-	sounds = default.node_sound_stone_defaults({ footstep = { name = "bedrock2_step", gain = 1 } }),
+	groups = slade_groups,
+	sounds = df_dependencies.sound_stone({ footstep = { name = "bedrock2_step", gain = 1 } }),
 	is_ground_content = false,
+	_mcl_blast_resistance = 1200,
+	_mcl_hardness = 50,
 }
 if invulnerable then
 	slade_seal_def.on_blast = function() end
@@ -118,7 +137,15 @@ if invulnerable then
 end
 minetest.register_node("df_underworld_items:slade_seal", slade_seal_def)
 
-
+minetest.register_craft({
+	type = "shapeless",
+	output = "df_underworld_items:slade_brick",
+	recipe = {
+		"df_underworld_items:slade_sand",
+		df_dependencies.node_name_bucket_lava,
+	},
+	replacements = {{df_dependencies.node_name_bucket_lava, df_dependencies.node_name_bucket_empty}},
+})
 
 minetest.register_abm{
 	label = "slade seal scratching",
@@ -140,33 +167,18 @@ minetest.register_abm{
 
 -- Register stair and slab
 
-if minetest.get_modpath("stairs") then
-	local stair_groups = {level = 3, mese_radiation_shield=1, pit_plasma_resistant=1, slade=1}
-	if invulnerable then
-		stair_groups.immortal = 1
-	end
-	stair_groups.cracky = 3
-	
-	stairs.register_stair_and_slab(
-		"slade_brick",
-		"df_underworld_items:slade_brick",
-		stair_groups,
-		{"dfcaverns_slade_brick.png"},
-		S("Slade Stair"),
-		S("Slade Slab"),
-		default.node_sound_stone_defaults({ footstep = { name = "bedrock2_step", gain = 1 } })
-	)
-	
-	if invulnerable then
-		for name, def in pairs(minetest.registered_nodes) do
-			if name:sub(1,7) == "stairs:" and name:sub(-11) == "slade_brick" then
-				minetest.override_item(name, {can_dig = server_diggable_only})
-			end
+df_dependencies.register_stairs("slade_brick")
+
+if invulnerable then
+	for name, def in pairs(minetest.registered_nodes) do
+		if (name:sub(1,7) == "stairs:" and name:sub(-11) == "slade_block") or 
+			name:sub(1,11) == "mcl_stairs:" and name:sub(-11) == "slade_brick" then
+				minetest.override_item(name, {can_dig = server_diggable_only})			
 		end
 	end
-	
 end
 
+
 if minetest.get_modpath("mesecons_mvps") and df_underworld_items.config.invulnerable_slade then
 	mesecon.register_mvps_stopper("df_underworld_items:slade")
 end

df_underworld_items/slade_drill.lua

@@ -0,0 +1,84 @@
+local S = minetest.get_translator(minetest.get_current_modname())
+
+local use_timeout = {}
+
+local check_timeout = function(user)
+	if not user:is_player() then return false end
+	local player_name = user:get_player_name()
+	local curr_time = minetest.get_gametime() -- minetest.get_us_time() for microsecond precision
+	local last_used = use_timeout[player_name]
+	if not last_used or curr_time > last_used then
+		use_timeout[player_name] = curr_time
+		return true
+	end
+end
+
+local drill_particles = function(pos)
+	minetest.add_particlespawner({
+		amount = 25,
+		time = 0.5,
+		minpos = pos,
+		maxpos = pos,
+		minvel = {x=-5, y=0, z=-5},
+		maxvel = {x=5, y=10, z=5},
+		minacc = {x=0, y=-10, z=0},
+		maxacc = {x=0, y=-10, z=0},
+		minexptime = 2.5,
+		maxexptime = 7.5,
+		minsize = 1,
+		maxsize = 5,
+		texture = "dfcaverns_glowpit_particle.png",
+		collisiondetection = true,
+		collision_removal = true,
+		glow = 15,
+	})
+end
+
+local slade_drill_def = {
+	_doc_items_longdesc = df_underworld_items.doc.slade_drill_desc,
+	_doc_items_usagehelp = df_underworld_items.doc.slade_drill_usage,
+	light_source = minetest.LIGHT_MAX,
+	description = S("Slade Drill"),
+	inventory_image = "dfcaverns_slade_drill.png",
+	groups = {cracky=3, stone=1, slade=1, pit_plasma_resistant=1, mese_radiation_shield=1,creative_breakable=1, material_stone=1},
+	sounds = df_dependencies.sound_stone({ footstep = { name = "bedrock2_step", gain = 1 } }),
+	_mcl_blast_resistance = 8,
+	_mcl_hardness = 5,
+	on_use = function(itemstack, user, pointed_thing)
+		if pointed_thing.type == "node" then
+			local pos = pointed_thing.under
+			local node = minetest.get_node(pos)
+			if node.name == "df_underworld_items:slade" and check_timeout(user) then
+				if not minetest.is_creative_enabled(user:get_player_name()) then
+					itemstack:set_wear(itemstack:get_wear()+1)
+				end
+				minetest.sound_play("dfcaverns_slade_drill", {pos = user:get_pos()})
+				minetest.set_node(pos, {name="df_underworld_items:slade_sand"})
+				drill_particles(pointed_thing.above)
+				return itemstack
+			end
+		end	
+	end,
+}
+
+local tnt_boom = df_dependencies.tnt_boom
+if tnt_boom then
+	slade_drill_def.on_use = function(itemstack, user, pointed_thing)
+		if not check_timeout(user) then return end
+		local pos
+		if pointed_thing.type == "node" then pos = pointed_thing.under
+		elseif pointed_thing.type == "object" then pos = pointed_thing.ref:get_pos() end
+		if pos then
+			tnt_boom(pos, {radius=1})
+			minetest.sound_play("dfcaverns_slade_drill", {pos = user:get_pos()})
+			if not minetest.is_creative_enabled(user:get_player_name()) then
+				itemstack:set_wear(itemstack:get_wear()+1)
+			end
+			drill_particles(pos)
+			minetest.check_for_falling({x=pos.x, y=pos.y+1, z=pos.z})
+			return itemstack
+		end
+	end
+end
+
+minetest.register_tool("df_underworld_items:slade_drill", slade_drill_def)

df_underworld_items/sounds/license.txt

@@ -15,4 +15,9 @@ dfcaverns_seal_unlocked.ogg - from https://freesound.org/people/juskiddink/sound
 dfcaverns_seal_key.ogg - From https://freesound.org/people/megashroom/sounds/391488/ by megashroom under the CC0 public domain license
 dfcaverns_massive_digging.1.ogg - from https://freesound.org/people/OGsoundFX/sounds/423120/ by OGsoundFX under Creative Commons BY 3.0
 dfcaverns_massive_digging.2.ogg - from https://freesound.org/people/OGsoundFX/sounds/423120/ by OGsoundFX under Creative Commons BY 3.0
-dfcaverns_massive_digging.3.ogg - from https://freesound.org/people/OGsoundFX/sounds/423120/ by OGsoundFX under Creative Commons BY 3.0
+dfcaverns_massive_digging.3.ogg - from https://freesound.org/people/OGsoundFX/sounds/423120/ by OGsoundFX under Creative Commons BY 3.0
+
+dfcaverns_drill - from https://freesound.org/people/Jagadamba/sounds/257021/ by Jagadamba under the CC-BY-A 3.0 license
+
+dfcaverns_puzzle_chest_open - from https://freesound.org/people/Garuda1982/sounds/560304/ by Garuda1982 under CC-BY-A 4.0
+dfcaverns_puzzle_chest_close - from https://freesound.org/people/Benboncan/sounds/74441/ by Benboncan under CC-BY-A 4.0