Initial commit

.luacheckrc

@@ -0,0 +1,5 @@
+std = "min"
+read_globals = {"minetest", "vector"}
+globals = {"large_slugs"}
+ignore = {"21/_.*"}
+max_line_length = 80

api.lua

@@ -0,0 +1,23 @@
+large_slugs.registered_slugs = {}
+
+function large_slugs.register_slug(name, def)
+	minetest.register_node(name, {
+		description = def.description,
+		drawtype = "signlike",
+		tiles = {def.texture},
+		inventory_image = def.texture,
+		selection_box = {
+			type = "wallmounted",
+			wall_top = {-8/16, 8/16, -8/16, 8/16, 7/16, 8/16},
+			wall_bottom = {-8/16, -8/16, -8/16, 8/16, -7/16, 8/16},
+			wall_side = {-8/16, -8/16, -8/16, -7/16, 8/16, 8/16},
+		},
+		sunlight_propagates = true,
+		paramtype = "light",
+		paramtype2 = "wallmounted",
+		groups = {large_slug = 1, dig_immediate = 3, attached_node = 1},
+		walkable = false,
+		floodable = true,
+	})
+	large_slugs.registered_slugs[name] = def
+end

behavior.lua

@@ -0,0 +1,125 @@
+local MOVE_INTERVAL =
+	tonumber(minetest.settings:get("large_slugs_move_interval")) or 5
+local MOVE_CHANCE =
+	tonumber(minetest.settings:get("large_slugs_move_chance")) or 5
+local BIRTH_INTERVAL =
+	tonumber(minetest.settings:get("large_slugs_birth_interval")) or 10
+local BIRTH_CHANCE =
+	tonumber(minetest.settings:get("large_slugs_birth_chance")) or 10
+local BIRTH_SPACE =
+	tonumber(minetest.settings:get("large_slugs_birth_space")) or 11
+
+local WALLMOUNT_TO_PERP_WALLMOUNTS = {}
+WALLMOUNT_TO_PERP_WALLMOUNTS[0] = {4, 2, 5, 3}
+WALLMOUNT_TO_PERP_WALLMOUNTS[2] = {4, 0, 5, 1}
+WALLMOUNT_TO_PERP_WALLMOUNTS[4] = {2, 0, 3, 1}
+WALLMOUNT_TO_PERP_WALLMOUNTS[1] = WALLMOUNT_TO_PERP_WALLMOUNTS[0]
+WALLMOUNT_TO_PERP_WALLMOUNTS[3] = WALLMOUNT_TO_PERP_WALLMOUNTS[2]
+WALLMOUNT_TO_PERP_WALLMOUNTS[5] = WALLMOUNT_TO_PERP_WALLMOUNTS[4]
+
+local WALLMOUNT_TO_OPP_WALLMOUNT = {
+	[0] = 1, [1] = 0, [2] = 3, [3] = 2, [4] = 5, [5] = 4,
+}
+
+local function get_move_options(pos, node, include_here)
+	local ground_nodes = large_slugs.registered_slugs[node.name].ground
+
+	local wallmount = node.param2 % 6
+	local dir = minetest.wallmounted_to_dir(wallmount)
+
+	local rotate_opts = include_here and {}
+	local shift_opts = {}
+	local rotate_shift_opts = {}
+
+	local perp_wallmounts = WALLMOUNT_TO_PERP_WALLMOUNTS[wallmount]
+	for _, perp_wallmount in ipairs(perp_wallmounts) do
+		local perp_dir = minetest.wallmounted_to_dir(perp_wallmount)
+
+		local check_pos = vector.add(pos, perp_dir)
+		local check_node = minetest.get_node(check_pos)
+		if include_here and ground_nodes[check_node.name] then
+			rotate_opts[#rotate_opts + 1] = perp_wallmount
+		elseif check_node.name == "air" then
+			local shift_pos = check_pos
+			check_pos = vector.add(check_pos, dir)
+			check_node = minetest.get_node(check_pos)
+			if ground_nodes[check_node.name] then
+				shift_opts[#shift_opts + 1] = shift_pos
+			elseif check_node.name == "air" then
+				rotate_shift_opts[#rotate_shift_opts + 1] = {
+					WALLMOUNT_TO_OPP_WALLMOUNT[
+						perp_wallmount],
+					check_pos,
+				}
+			end
+		end
+	end
+
+	return rotate_opts, shift_opts, rotate_shift_opts
+end
+
+local function move_slug(pos, node)
+	local rotate_opts, shift_opts, rotate_shift_opts =
+		get_move_options(pos, node, true)
+
+	local n_rotate_opts = #rotate_opts
+	local n_shift_opts = #shift_opts
+	local n_rotate_shift_opts = #rotate_shift_opts
+	local n_opts = n_rotate_opts + n_shift_opts + n_rotate_shift_opts
+	if n_opts < 1 then return end
+	local choice = math.random(n_opts)
+	if choice <= n_rotate_opts then
+		local chosen_wallmount = rotate_opts[choice]
+		node.param2 = node.param2 - node.param2 % 8 + chosen_wallmount
+		minetest.swap_node(pos, node)
+	elseif choice <= n_rotate_opts + n_shift_opts then
+		local chosen_pos = shift_opts[choice - n_rotate_opts]
+		minetest.remove_node(pos)
+		minetest.set_node(chosen_pos, node)
+	else
+		local chosen =
+			rotate_shift_opts[choice - n_rotate_opts - n_shift_opts]
+		minetest.remove_node(pos)
+		node.param2 = node.param2 - node.param2 % 8 + chosen[1]
+		minetest.set_node(chosen[2], node)
+	end
+end
+
+local function birth_slug(pos, node)
+	if minetest.find_node_near(pos, BIRTH_SPACE, node.name) then return end
+
+	local _rotate_opts, shift_opts, rotate_shift_opts =
+		get_move_options(pos, node, false)
+
+	local n_shift_opts = #shift_opts
+	local n_rotate_shift_opts = #rotate_shift_opts
+	local n_opts = n_shift_opts + n_rotate_shift_opts
+	if n_opts < 1 then return end
+	local choice = math.random(n_opts)
+	if choice <= n_shift_opts then
+		local chosen_pos = shift_opts[choice]
+		minetest.set_node(chosen_pos, node)
+	else
+		local chosen = rotate_shift_opts[choice - n_shift_opts]
+		node.param2 = node.param2 - node.param2 % 8 + chosen[1]
+		minetest.set_node(chosen[2], node)
+	end
+end
+
+minetest.register_abm({
+	label = "Slugs moving",
+	nodenames = "group:large_slug",
+	interval = MOVE_INTERVAL,
+	chance = MOVE_CHANCE,
+	catch_up = false,
+	action = move_slug,
+})
+
+minetest.register_abm({
+	label = "Slugs birthing",
+	nodenames = "group:large_slug",
+	interval = BIRTH_INTERVAL,
+	chance = BIRTH_CHANCE,
+	catch_up = false,
+	action = birth_slug,
+})

init.lua

@@ -0,0 +1,7 @@
+large_slugs = {}
+
+local modpath = minetest.get_modpath(minetest.get_current_modname())
+dofile(modpath.."/api.lua")
+dofile(modpath.."/behavior.lua")
+dofile(modpath.."/slugs.lua")
+dofile(modpath.."/mapgen.lua")

mapgen.lua

@@ -0,0 +1,83 @@
+print("MAPGEN")
+
+local function noise_params(ratio, seed)
+	return {
+		offset = 0,
+		scale = ratio,
+		spread = {x = 32, y = 32, z = 32},
+		seed = seed,
+		octaves = 1,
+		persistence = 1,
+		lacunarity = 1,
+		flags = "absvalue",
+	}
+end
+
+minetest.register_decoration({
+	name = "large_slugs:grass_slug",
+	deco_type = "simple",
+	place_on = {"default:dirt_with_grass"},
+	fill_ratio = 0.01,
+	y_max = 200,
+	y_min = 0,
+	decoration = "large_slugs:grass_slug",
+	param2 = 1,
+})
+
+minetest.register_decoration({
+	name = "large_slugs:pine_slug",
+	deco_type = "simple",
+	place_on = {"default:dirt_with_coniferous_litter"},
+	fill_ratio = 0.01,
+	y_max = 250,
+	y_min = 0,
+	decoration = "large_slugs:pine_slug",
+	param2 = 1,
+})
+
+minetest.register_decoration({
+	name = "large_slugs:rainforest_slug",
+	deco_type = "simple",
+	place_on = {"default:dirt_with_rainforest_litter"},
+	fill_ratio = 0.01,
+	y_max = 200,
+	y_min = 0,
+	decoration = "large_slugs:rainforest_slug",
+	param2 = 1,
+})
+
+minetest.register_decoration({
+	name = "large_slugs:cave_slug",
+	deco_type = "simple",
+	place_on = {"default:stone"},
+	fill_ratio = 0.012,
+	flags = "all_floors",
+	y_max = -32,
+	y_min = -31000,
+	decoration = "large_slugs:cave_slug",
+	param2 = 1,
+})
+
+minetest.register_decoration({
+	name = "large_slugs:iron_slug",
+	deco_type = "simple",
+	place_on = {"default:stone"},
+	fill_ratio = 0.005,
+	flags = "all_floors",
+	y_max = -128,
+	y_min = -31000,
+	decoration = "large_slugs:iron_slug",
+	param2 = 1,
+})
+
+minetest.register_decoration({
+	name = "large_slugs:mese_slug",
+	deco_type = "simple",
+	place_on = {"default:stone"},
+	fill_ratio = 0.001,
+	flags = "all_floors",
+	y_max = -512,
+	y_min = -31000,
+	decoration = "large_slugs:mese_slug",
+	param2 = 1,
+})

mod.conf

@@ -0,0 +1,2 @@
+name = large_slugs
+depends = default

slugs.lua

@@ -0,0 +1,61 @@
+large_slugs.register_slug("large_slugs:grass_slug", {
+	description = "Grass Slug",
+	texture = "large_slugs_slug.png^[multiply:#696533",
+	ground = {
+		["default:dirt"] = true,
+		["default:dirt_with_grass"] = true,
+	},
+})
+
+large_slugs.register_slug("large_slugs:pine_slug", {
+	description = "Pine Slug",
+	texture = "large_slugs_slug.png^[multiply:#444220",
+	ground = {
+		["default:dirt"] = true,
+		["default:dirt_with_coniferous_litter"] = true,
+		["default:pine_tree"] = true,
+	},
+})
+
+large_slugs.register_slug("large_slugs:rainforest_slug", {
+	description = "Rainforest Slug",
+	texture = "large_slugs_slug.png^[multiply:#B5AC44",
+	ground = {
+		["default:dirt"] = true,
+		["default:dirt_with_rainforest_litter"] = true,
+		["default:jungletree"] = true,
+	},
+})
+
+large_slugs.register_slug("large_slugs:cave_slug", {
+	description = "Cave Slug",
+	texture = "large_slugs_slug.png^[multiply:#555343",
+	ground = {
+		["default:stone"] = true,
+		["default:cobble"] = true,
+		["default:mossycobble"] = true,
+		["default:stone_with_coal"] = true,
+	},
+})
+
+large_slugs.register_slug("large_slugs:iron_slug", {
+	description = "Iron Slug",
+	texture = "large_slugs_slug.png^[multiply:#A0661E",
+	ground = {
+		["default:stone"] = true,
+		["default:cobble"] = true,
+		["default:mossycobble"] = true,
+		["default:stone_with_iron"] = true,
+	},
+})
+
+large_slugs.register_slug("large_slugs:mese_slug", {
+	description = "Mese Slug",
+	texture = "large_slugs_slug.png^[multiply:#FFEB00",
+	ground = {
+		["default:stone"] = true,
+		["default:cobble"] = true,
+		["default:mossycobble"] = true,
+		["default:stone_with_mese"] = true,
+	},
+})