Primordial cavern layer (#12)

* bring in the art assets from ClockGen's "better_caves_modpack" under CC BY 4.0,, code written from scratch.

* update mapgen_helper

* import ClockGen's giant mushroom schematics, make them and giant ferns growable

* add giant jungle mushroom, rough out actual cavern layer code framework

* fungal ceiling decorations

* decorate fungal floor a bit

* update mapgen_helper

* update primordial mushroom schematic placement to ensure it fits

* add giant mycelium fungoidal structure

* add giant mycelium to mapgen

* fix settings for giant mycelium

* make mycelium grow when players aren't present

* allow mycelium growth to pause when it hits unloaded areas

* add a use for giant mycelium

* make giant mushrooms edible, make jungle trees growable

* rough out the jungle biome

* Make a spectrum of jungle growth

* optimize pngs, add is_ground_content to everything

* use custom is_ground_content method

* fix a crash with veinstone, and simplify nvals_cave lookup now that overgen covers the same area

* more fixes for overgen support

* remove unintentional airspace from underside of slade

* fix for overgen crash in level 2

* primordial column material, add sealed shafts to underworld

* add seal block

* Set up puzzle seals to be able to dig a staircase shaft through the slade layer. TODO: the puzzle to guard the trigger.

* puzzle seals now fully functional. Need to add clues for decoding the keys next.

* add a small bit of anti-griefing - the seal breach bell only tolls globally 13 times per activation

* add flowers to the underworld warrior bones

* switch to a different key bell

* fancy up the puzzle seal temples with some custom blocks, add sub-slade grid passages

* add a clue to the seal formspec

* tweak background of inscription 2 so it's less obviously a copy of the background for inscription 1

* switch to compositing to save a few bytes

* fancy up the seal's upper surface with inscriptions to make the formspec feel consistent

* puzzle particle, bones were only spawning on top of structures

* fix ice/oil on level 3, tweak some loot probabilities

* add trail mod support

* remove deprecated files

* boost default plant growth delay, add growing selection boxes

* update map colours

* add named waypoints to the underworld

* try a more efficient way of changing the interiors of columns

* polishing up the Primordial layer

* update guide with some Primordial teasers

* updated magma sea screenshot

* update mapgen_helper and subterrane

* reduce density of megaflora a bit - was too hard to walk through

* spreading_dirt_type depends on light, create my own ABM instead

* add names to the glowing pits and some of the ruins

* separate setting for ruin markers

* record identity of slade-breachers

* make mycelia climbable

* update subterrane

* change surface tunnel detection to allow above-ground stalactites and stalagmites

* add rare thicker Goblin Caps, suitable for use as huts.

* better goblin cap schematics

* update colours

* make it slightly harder to dig down through amethyst sheathing of pits

* fixing up fungus light sensitivity, tree growth code

* fix a few minor bugs

* update deprecated functions

* add various eating sounds

* make mapping kit requirement more flexible

* update spindlestem growth code, remove deprecated functions

* fix leftover undefined variable

* add fireflies to primordial, spread out the post-mapgen node timer for plant matter a bit more.

* fix bones formspec

* add lbm to upgrade old bones

* fix slade undiggability

* make torchspines smokey and manually lightable

* fix drop definitions

* generate dry stalactites in near-surface caverns.

* caverns become far too smokey, alas

* add pitter patter of spore tree spores, alternate paper recipe

* new mapgen_helper metrics

* add smokey back to torchspine now that it can be dialed down a bit

* replace glowstone texture with a new animated one

* switch from ABM to node timer for mapgen mycelium growth

* make mapgen mycelium timer delay configurable

* improve the efficiency of giant mycelium growth using flat node array, fewer dereferences

* remove the smoke from torchspines again - it doesn't dissipate that deep underground

* give slade a more muted, gloomy hue to differentiate it from nether stone

* update screenshots with new slade colors

* update mapgen_helper

df_trees/goblin_cap.lua

@@ -8,7 +8,7 @@ minetest.register_node("df_trees:goblin_cap_stem", {
 	_doc_items_longdesc = df_trees.doc.goblin_cap_desc,
 	_doc_items_usagehelp = df_trees.doc.goblin_cap_usage,
 	tiles = {"dfcaverns_goblin_cap_stem.png"},
-	is_ground_content = true,
+	is_ground_content = false,
 	groups = {tree = 1, choppy = 2, oddly_breakable_by_hand = 1, flammable = 2, goblin_cap = 1},
 	sounds = df_trees.node_sound_tree_soft_fungus_defaults(),
 })
@@ -19,7 +19,7 @@ minetest.register_node("df_trees:goblin_cap", {
 	_doc_items_longdesc = df_trees.doc.goblin_cap_desc,
 	_doc_items_usagehelp = df_trees.doc.goblin_cap_usage,
 	tiles = {"dfcaverns_goblin_cap.png"},
-	is_ground_content = true,
+	is_ground_content = false,
 	groups = {tree = 1, choppy = 2, oddly_breakable_by_hand = 1, flammable = 2, goblin_cap = 1},
 	sounds = df_trees.node_sound_tree_soft_fungus_defaults(),
 })
@@ -30,7 +30,7 @@ minetest.register_node("df_trees:goblin_cap_gills", {
 	_doc_items_longdesc = df_trees.doc.goblin_cap_desc,
 	_doc_items_usagehelp = df_trees.doc.goblin_cap_usage,
 	tiles = {"dfcaverns_goblin_cap_gills.png"},
-	is_ground_content = true,
+	is_ground_content = false,
 	groups = {snappy = 3, leafdecay = 3, flammable = 2, leaves = 1, goblin_cap = 1},
 	sounds = default.node_sound_leaves_defaults(),
 	drawtype = "plantlike",
@@ -131,6 +131,57 @@ minetest.register_craft({
 	burntime = 2,
 })
 
+local big_goblin_cap_schem = dofile(MP.."/schematics/goblin_cap_big.lua")
+local big_goblin_cap_hut_schem = dofile(MP.."/schematics/goblin_cap_big_hut.lua")
+local bigger_goblin_cap_schem = dofile(MP.."/schematics/goblin_cap_bigger.lua")
+local bigger_goblin_cap_hut_schem = dofile(MP.."/schematics/goblin_cap_bigger_hut.lua")
+
+-- The hut has a chest and furnace near pos, use this to initialize it
+local chest_on_construct = minetest.registered_items["default:chest"].on_construct
+local furnace_on_construct = minetest.registered_items["default:furnace"].on_construct
+local init_hut = function(pos)
+	local chest_pos = minetest.find_node_near({x=pos.x, y=pos.y+1, z=pos.z}, 2, "default:chest")
+	if chest_pos then
+		chest_on_construct(chest_pos)
+		local inv = minetest.get_inventory({type="node", pos=chest_pos})
+		inv:add_item("main", "default:apple 3")
+		inv:add_item("main", "default:gold_ingot ".. math.random(1,5))
+	end
+	local furnace_pos = minetest.find_node_near({x=pos.x, y=pos.y+1, z=pos.z}, 2, "default:furnace")
+	if furnace_pos then
+		furnace_on_construct(furnace_pos)
+	end
+end
+local init_vessels
+if minetest.get_modpath("vessels") then
+	local vessels_on_construct = minetest.registered_items["vessels:shelf"].on_construct
+	init_vessels = function(pos)
+		local vessel_pos = minetest.find_node_near({x=pos.x, y=pos.y+1, z=pos.z}, 2, "vessels:shelf")
+		if vessel_pos then
+			vessels_on_construct(vessel_pos)
+			local inv = minetest.get_inventory({type="node", pos=vessel_pos})
+			inv:add_item("vessels", "df_trees:glowing_bottle_red "..math.random(50,99))
+			inv:add_item("vessels", "df_trees:glowing_bottle_green "..math.random(50,99))
+			inv:add_item("vessels", "df_trees:glowing_bottle_cyan "..math.random(40,99))
+			inv:add_item("vessels", "df_trees:glowing_bottle_golden "..math.random(30,99))
+		end
+	end
+end
+
+--local debug_test_hut = function(pos)
+--	minetest.set_node(pos, {name="air"})
+--	minetest.after(5, init_hut, pos)
+--	if math.random() < 0.5 then
+--		mapgen_helper.place_schematic(pos, big_goblin_cap_hut_schem, "random")
+--	else
+--		if init_vessels then
+--			minetest.after(5, init_vessels, pos)
+--		end
+--		mapgen_helper.place_schematic(pos, bigger_goblin_cap_hut_schem, "random")
+--	end
+--end
+
+
 -- sapling
 minetest.register_node("df_trees:goblin_cap_sapling", {
 	description = S("Goblin Cap Spawn"),
@@ -143,6 +194,7 @@ minetest.register_node("df_trees:goblin_cap_sapling", {
 	wield_image = "dfcaverns_goblin_cap_sapling.png",
 	paramtype = "light",
 	sunlight_propagates = true,
+	is_ground_content = false,
 	walkable = false,
 	floodable = true,
 	selection_box = {
@@ -154,17 +206,33 @@ minetest.register_node("df_trees:goblin_cap_sapling", {
 	sounds = default.node_sound_leaves_defaults(),
 
 	on_construct = function(pos)
-		local below_node = minetest.get_node(vector.add(pos, {x=0,y=-1,z=0}))
-		if minetest.get_item_group(below_node.name, "soil") > 0 then
-			minetest.get_node_timer(pos):start(math.random(
-				df_trees.config.goblin_cap_delay_multiplier*df_trees.config.tree_min_growth_delay,
-				df_trees.config.goblin_cap_delay_multiplier*df_trees.config.tree_max_growth_delay))
+		if minetest.get_item_group(minetest.get_node({x=pos.x, y=pos.y-1, z=pos.z}).name, "soil") == 0 then
+			return
 		end
+		minetest.get_node_timer(pos):start(math.random(
+			df_trees.config.goblin_cap_delay_multiplier*df_trees.config.tree_min_growth_delay,
+			df_trees.config.goblin_cap_delay_multiplier*df_trees.config.tree_max_growth_delay))
+	end,
+	on_destruct = function(pos)
+		minetest.get_node_timer(pos):stop()
 	end,
 	
 	on_timer = function(pos)
+		if df_farming and df_farming.kill_if_sunlit(pos) then
+			return
+		end
+
 		minetest.set_node(pos, {name="air"})
-		df_trees.spawn_goblin_cap(pos)
+		if minetest.find_node_near({x=pos.x, y=pos.y-1, z=pos.z}, 1, {"group:straw"}) then
+			if math.random() < 0.5 then
+				mapgen_helper.place_schematic(pos, big_goblin_cap_schem)
+			else
+				mapgen_helper.place_schematic(pos, bigger_goblin_cap_schem)
+			end
+			return
+		else
+			df_trees.spawn_goblin_cap(pos)
+		end
 	end,
 })
 
@@ -172,8 +240,35 @@ local c_stem = minetest.get_content_id("df_trees:goblin_cap_stem")
 local c_cap  = minetest.get_content_id("df_trees:goblin_cap")
 local c_gills  = minetest.get_content_id("df_trees:goblin_cap_gills")
 
+-- If the farming mod is installed, add the "straw" group to farming straw.
+-- This way we just need to check for group:straw to get cave straw as well, without 
+-- needing a df_farming dependency for this mod.
+if minetest.get_modpath("farming") then
+	local straw_def = minetest.registered_items["farming:straw"]
+	if straw_def then
+		local new_groups = {}
+		for group, val in pairs(straw_def.groups) do
+			new_groups[group] = val
+		end
+		new_groups.straw = 1
+		minetest.override_item("farming:straw", {
+			groups = new_groups
+		})
+	end
+end
+
 df_trees.spawn_goblin_cap = function(pos)
+	if math.random() < 0.1 then
+		if math.random() < 0.5 then
+			mapgen_helper.place_schematic(pos, big_goblin_cap_schem)
+		else
+			mapgen_helper.place_schematic(pos, bigger_goblin_cap_schem)
+		end
+		return
+	end
+
 	local x, y, z = pos.x, pos.y, pos.z
+	
 	local stem_height = math.random(1,3)
 	local cap_radius = math.random(3,6)
 	local maxy = y + stem_height + 3
@@ -193,7 +288,28 @@ df_trees.spawn_goblin_cap = function(pos)
 	vm:update_map()
 end
 
-df_trees.spawn_goblin_cap_vm = function(vi, area, data)
+df_trees.spawn_goblin_cap_vm = function(vi, area, data, data_param2)
+	if math.random() < 0.1 then
+		local pos = area:position(vi)
+		if math.random() < 0.5 then
+			mapgen_helper.place_schematic_on_data(data, data_param2, area, pos, big_goblin_cap_schem)
+		elseif math.random() < 0.9 then
+			mapgen_helper.place_schematic_on_data(data, data_param2, area, pos, bigger_goblin_cap_schem)
+		else
+			-- easter egg - every once in a while (0.5%), a mapgen Goblin cap is a Smurf house
+			minetest.after(5, init_hut, pos)
+			if math.random() < 0.5 then
+				mapgen_helper.place_schematic_on_data(data, data_param2, area, pos, big_goblin_cap_hut_schem)
+			else
+				if init_vessels then
+					minetest.after(5, init_vessels, pos)
+				end
+				mapgen_helper.place_schematic_on_data(data, data_param2, area, pos, bigger_goblin_cap_hut_schem)
+			end
+		end
+		return
+	end
+
 	local stem_height = math.random(1,3)
 	local cap_radius = math.random(3,6)
 	subterrane.giant_mushroom(vi, area, data, c_stem, c_cap, c_gills, stem_height, cap_radius)