lib_ecology/lib_ecology_sound_defaults.lua

--
-- Sounds
--

function lib_ecology.node_sound_defaults(table)
	table = table or {}
	table.footstep = table.footstep or
			{name = "", gain = 1.0}
	table.dug = table.dug or
			{name = "default_dug_node", gain = 0.25}
	table.place = table.place or
			{name = "default_place_node_hard", gain = 1.0}
	return table
end

function lib_ecology.node_sound_stone_defaults(table)
	table = table or {}
	table.footstep = table.footstep or
			{name = "default_hard_footstep", gain = 0.3}
	table.dug = table.dug or
			{name = "default_hard_footstep", gain = 1.0}
	lib_ecology.node_sound_defaults(table)
	return table
end

function lib_ecology.node_sound_dirt_defaults(table)
	table = table or {}
	table.footstep = table.footstep or
			{name = "default_dirt_footstep", gain = 0.4}
	table.dug = table.dug or
			{name = "default_dirt_footstep", gain = 1.0}
	table.place = table.place or
			{name = "default_place_node", gain = 1.0}
	lib_ecology.node_sound_defaults(table)
	return table
end

function lib_ecology.node_sound_sand_defaults(table)
	table = table or {}
	table.footstep = table.footstep or
			{name = "default_sand_footstep", gain = 0.12}
	table.dug = table.dug or
			{name = "default_sand_footstep", gain = 0.24}
	table.place = table.place or
			{name = "default_place_node", gain = 1.0}
	lib_ecology.node_sound_defaults(table)
	return table
end

function lib_ecology.node_sound_gravel_defaults(table)
	table = table or {}
	table.footstep = table.footstep or
			{name = "default_gravel_footstep", gain = 0.4}
	table.dug = table.dug or
			{name = "default_gravel_footstep", gain = 1.0}
	table.place = table.place or
			{name = "default_place_node", gain = 1.0}
	lib_ecology.node_sound_defaults(table)
	return table
end

function lib_ecology.node_sound_wood_defaults(table)
	table = table or {}
	table.footstep = table.footstep or
			{name = "default_wood_footstep", gain = 0.3}
	table.dug = table.dug or
			{name = "default_wood_footstep", gain = 1.0}
	lib_ecology.node_sound_defaults(table)
	return table
end

function lib_ecology.node_sound_leaves_defaults(table)
	table = table or {}
	table.footstep = table.footstep or
			{name = "default_grass_footstep", gain = 0.45}
	table.dug = table.dug or
			{name = "default_grass_footstep", gain = 0.7}
	table.place = table.place or
			{name = "default_place_node", gain = 1.0}
	lib_ecology.node_sound_defaults(table)
	return table
end

function lib_ecology.node_sound_glass_defaults(table)
	table = table or {}
	table.footstep = table.footstep or
			{name = "default_glass_footstep", gain = 0.3}
	table.dig = table.dig or
			{name = "default_glass_footstep", gain = 0.5}
	table.dug = table.dug or
			{name = "default_break_glass", gain = 1.0}
	lib_ecology.node_sound_defaults(table)
	return table
end

function lib_ecology.node_sound_metal_defaults(table)
	table = table or {}
	table.footstep = table.footstep or
			{name = "default_metal_footstep", gain = 0.4}
	table.dig = table.dig or
			{name = "default_dig_metal", gain = 0.5}
	table.dug = table.dug or
			{name = "default_dug_metal", gain = 0.5}
	table.place = table.place or
			{name = "default_place_node_metal", gain = 0.5}
	lib_ecology.node_sound_defaults(table)
	return table
end

function lib_ecology.node_sound_water_defaults(table)
	table = table or {}
	table.footstep = table.footstep or
			{name = "default_water_footstep", gain = 0.2}
	lib_ecology.node_sound_defaults(table)
	return table
end

function lib_ecology.node_sound_snow_defaults(table)
	table = table or {}
	table.footstep = table.footstep or
			{name = "default_snow_footstep", gain = 0.2}
	table.dig = table.dig or
			{name = "default_snow_footstep", gain = 0.3}
	table.dug = table.dug or
			{name = "default_snow_footstep", gain = 0.3}
	table.place = table.place or
			{name = "default_place_node", gain = 1.0}
	lib_ecology.node_sound_defaults(table)
	return table
end


--
-- Lavacooling
--

lib_ecology.cool_lava = function(pos, node)
	if node.name == "default:lava_source" then
		minetest.set_node(pos, {name = "default:obsidian"})
	else -- Lava flowing
		minetest.set_node(pos, {name = "default:stone"})
	end
	minetest.sound_play("default_cool_lava",
		{pos = pos, max_hear_distance = 16, gain = 0.25})
end

if minetest.settings:get_bool("enable_lavacooling") ~= false then
	minetest.register_abm({
		label = "Lava cooling",
		nodenames = {"default:lava_source", "default:lava_flowing"},
		neighbors = {"group:cools_lava", "group:water"},
		interval = 2,
		chance = 2,
		catch_up = false,
		action = function(...)
			lib_ecology.cool_lava(...)
		end,
	})
end


--
-- Papyrus and cactus growing
--

-- Wrapping the functions in ABM action is necessary to make overriding them possible

function lib_ecology.grow_cactus(pos, node)
	if node.param2 >= 4 then
		return
	end
	pos.y = pos.y - 1
	if minetest.get_item_group(minetest.get_node(pos).name, "sand") == 0 then
		return
	end
	pos.y = pos.y + 1
	local height = 0
	while node.name == "default:cactus" and height < 4 do
		height = height + 1
		pos.y = pos.y + 1
		node = minetest.get_node(pos)
	end
	if height == 4 or node.name ~= "air" then
		return
	end
	if minetest.get_node_light(pos) < 13 then
		return
	end
	minetest.set_node(pos, {name = "default:cactus"})
	return true
end

function lib_ecology.grow_papyrus(pos, node)
	pos.y = pos.y - 1
	local name = minetest.get_node(pos).name
	if name ~= "default:dirt_with_grass" and name ~= "default:dirt" then
		return
	end
	if not minetest.find_node_near(pos, 3, {"group:water"}) then
		return
	end
	pos.y = pos.y + 1
	local height = 0
	while node.name == "default:papyrus" and height < 4 do
		height = height + 1
		pos.y = pos.y + 1
		node = minetest.get_node(pos)
	end
	if height == 4 or node.name ~= "air" then
		return
	end
	if minetest.get_node_light(pos) < 13 then
		return
	end
	minetest.set_node(pos, {name = "default:papyrus"})
	return true
end

minetest.register_abm({
	label = "Grow cactus",
	nodenames = {"default:cactus"},
	neighbors = {"group:sand"},
	interval = 12,
	chance = 83,
	action = function(...)
		lib_ecology.grow_cactus(...)
	end
})

minetest.register_abm({
	label = "Grow papyrus",
	nodenames = {"default:papyrus"},
	neighbors = {"default:dirt", "default:dirt_with_grass"},
	interval = 14,
	chance = 71,
	action = function(...)
		lib_ecology.grow_papyrus(...)
	end
})


--
-- Leafdecay
--

-- Prevent decay of placed leaves

lib_ecology.after_place_leaves = function(pos, placer, itemstack, pointed_thing)
	if placer and placer:is_player() and not placer:get_player_control().sneak then
		local node = minetest.get_node(pos)
		node.param2 = 1
		minetest.set_node(pos, node)
	end
end

-- Leafdecay
local function leafdecay_after_destruct(pos, oldnode, def)
	for _, v in pairs(minetest.find_nodes_in_area(vector.subtract(pos, def.radius),
			vector.add(pos, def.radius), def.leaves)) do
		local node = minetest.get_node(v)
		local timer = minetest.get_node_timer(v)
		if node.param2 == 0 and not timer:is_started() then
			timer:start(math.random(20, 120) / 10)
		end
	end
end

local function leafdecay_on_timer(pos, def)
	if minetest.find_node_near(pos, def.radius, def.trunks) then
		return false
	end

	local node = minetest.get_node(pos)
	local drops = minetest.get_node_drops(node.name)
	for _, item in ipairs(drops) do
		local is_leaf
		for _, v in pairs(def.leaves) do
			if v == item then
				is_leaf = true
			end
		end
		if minetest.get_item_group(item, "leafdecay_drop") ~= 0 or
				not is_leaf then
			minetest.add_item({
				x = pos.x - 0.5 + math.random(),
				y = pos.y - 0.5 + math.random(),
				z = pos.z - 0.5 + math.random(),
			}, item)
		end
	end

	minetest.remove_node(pos)
	minetest.check_for_falling(pos)
end

function lib_ecology.register_leafdecay(def)
	assert(def.leaves)
	assert(def.trunks)
	assert(def.radius)
	for _, v in pairs(def.trunks) do
		minetest.override_item(v, {
			after_destruct = function(pos, oldnode)
				leafdecay_after_destruct(pos, oldnode, def)
			end,
		})
	end
	for _, v in pairs(def.leaves) do
		minetest.override_item(v, {
			on_timer = function(pos)
				leafdecay_on_timer(pos, def)
			end,
		})
	end
end


--
-- Convert dirt to something that fits the environment
--
minetest.register_abm({
	label = "Grass spread",
	nodenames = {"default:dirt"},
	neighbors = {
		"air",
		"group:grass",
		"group:dry_grass",
		"default:snow",
	},
	interval = 6,
	chance = 50,
	catch_up = false,
	action = function(pos, node)
		-- Check for darkness: night, shadow or under a light-blocking node
		-- Returns if ignore above
		local above = {x = pos.x, y = pos.y + 1, z = pos.z}
		if (minetest.get_node_light(above) or 0) < 13 then
			return
		end

		-- Look for spreading dirt-type neighbours
		local p2 = minetest.find_node_near(pos, 1, "group:spreading_dirt_type")
		if p2 then
			local n3 = minetest.get_node(p2)
			minetest.set_node(pos, {name = n3.name})
			return
		end

		-- Else, any seeding nodes on top?
		local name = minetest.get_node(above).name
		-- Snow check is cheapest, so comes first
		if name == "default:snow" then
			minetest.set_node(pos, {name = "default:dirt_with_snow"})
		-- Most likely case first
		elseif minetest.get_item_group(name, "grass") ~= 0 then
			minetest.set_node(pos, {name = "default:dirt_with_grass"})
		elseif minetest.get_item_group(name, "dry_grass") ~= 0 then
			minetest.set_node(pos, {name = "default:dirt_with_dry_grass"})
		end
	end
})


--
-- Grass and dry grass removed in darkness
--
minetest.register_abm({
	label = "Grass covered",
	nodenames = {"group:spreading_dirt_type"},
	interval = 8,
	chance = 50,
	catch_up = false,
	action = function(pos, node)
		local above = {x = pos.x, y = pos.y + 1, z = pos.z}
		local name = minetest.get_node(above).name
		local nodedef = minetest.registered_nodes[name]
		if name ~= "ignore" and nodedef and not ((nodedef.sunlight_propagates or
				nodedef.paramtype == "light") and
				nodedef.liquidtype == "none") then
			minetest.set_node(pos, {name = "default:dirt"})
		end
	end
})


--
-- Moss growth on cobble near water
--
minetest.register_abm({
	label = "Moss growth",
	nodenames = {"default:cobble", "stairs:slab_cobble", "stairs:stair_cobble", "walls:cobble"},
	neighbors = {"group:water"},
	interval = 16,
	chance = 200,
	catch_up = false,
	action = function(pos, node)
		if node.name == "default:cobble" then
			minetest.set_node(pos, {name = "default:mossycobble"})
		elseif node.name == "stairs:slab_cobble" then
			minetest.set_node(pos, {name = "stairs:slab_mossycobble", param2 = node.param2})
		elseif node.name == "stairs:stair_cobble" then
			minetest.set_node(pos, {name = "stairs:stair_mossycobble", param2 = node.param2})
		elseif node.name == "walls:cobble" then
			minetest.set_node(pos, {name = "walls:mossycobble", param2 = node.param2})
		end
	end
})