337 lines
9.0 KiB
Lua
337 lines
9.0 KiB
Lua
local S = mobs.intllib
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mcl_mobspawners = {}
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local default_mob = "mobs_mc:pig"
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-- Monster spawner
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local spawner_default = default_mob.." 0 15 4 15"
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local function get_mob_textures(mob)
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-- FIXME: Ummm … wtf? Why isn't there a textures attribute?
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return minetest.registered_entities[mob].texture_list[1]
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end
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local function find_doll(pos)
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for _,obj in ipairs(minetest.get_objects_inside_radius(pos, 1)) do
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if not obj:is_player() then
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if obj ~= nil and obj:get_luaentity().name == "mcl_mobspawners:doll" then
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return obj
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end
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end
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end
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return nil
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end
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local function spawn_doll(pos)
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return minetest.add_entity({x=pos.x, y=pos.y-0.3, z=pos.z}, "mcl_mobspawners:doll")
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end
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local function set_doll_properties(doll, mob)
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local mobinfo = minetest.registered_entities[mob]
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local prop = {
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mesh = mobinfo.mesh,
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textures = get_mob_textures(mob),
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visual_size = {
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x = mobinfo.visual_size.x * 0.33333,
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y = mobinfo.visual_size.y * 0.33333,
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}
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}
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doll:set_properties(prop)
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doll:get_luaentity()._mob = mob
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end
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--[[ Public function: Setup the spawner at pos.
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This function blindly assumes there's actually a spawner at pos.
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If not, then the results are undefined.
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All the arguments are optional!
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* Mob: ID of mob to spawn (default: mobs_mc:pig)
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* MinLight: Minimum light to spawn (default: 0)
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* MaxLight: Maximum light to spawn (default: 15)
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* MaxMobsInArea: How many mobs are allowed in the area around the spawner (default: 4)
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* PlayerDistance: Spawn mobs only if a player is within this distance; 0 to disable (default: 15)
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* YOffset: Y offset to spawn mobs; 0 to disable (default: 0)
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]]
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function mcl_mobspawners.setup_spawner(pos, Mob, MinLight, MaxLight, MaxMobsInArea, PlayerDistance, YOffset)
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-- Activate monster spawner and disable editing functionality
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if Mob == nil then Mob = default_mob end
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if MinLight == nil then MinLight = 0 end
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if MaxLight == nil then MaxLight = 15 end
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if MaxMobsInArea == nil then MaxMobsInArea = 4 end
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if PlayerDistance == nil then PlayerDistance = 15 end
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if YOffset == nil then YOffset = 0 end
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local meta = minetest.get_meta(pos)
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meta:set_string("Mob", Mob)
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meta:set_int("MinLight", MinLight)
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meta:set_int("MaxLight", MaxLight)
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meta:set_int("MaxMobsInArea", MaxMobsInArea)
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meta:set_int("PlayerDistance", PlayerDistance)
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meta:set_int("YOffset", YOffset)
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-- Create doll
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local doll = spawn_doll(pos)
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set_doll_properties(doll, Mob)
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-- Start spawning very soon
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local t = minetest.get_node_timer(pos)
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t:start(2)
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end
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-- Spawn monsters around pos
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-- NOTE: The node is timer-based, rather than ABM-based.
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local spawn_monsters = function(pos, elapsed)
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-- get meta
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local meta = minetest.get_meta(pos)
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-- get settings
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local mob = meta:get_string("Mob")
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local mlig = meta:get_int("MinLight")
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local xlig = meta:get_int("MaxLight")
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local num = meta:get_int("MaxMobsInArea")
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local pla = meta:get_int("PlayerDistance")
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local yof = meta:get_int("YOffset")
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-- if amount is 0 then do nothing
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if num == 0 then
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return
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end
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-- are we spawning a registered mob?
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if not mobs.spawning_mobs[mob] then
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minetest.log("error", "[mcl_mobspawners] Monster Spawner: Mob doesn't exist: "..mob)
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return
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end
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-- check objects inside 8×8 area around spawner
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local objs = minetest.get_objects_inside_radius(pos, 8)
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local count = 0
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local ent = nil
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local timer = minetest.get_node_timer(pos)
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-- spawn mob if player detected and in range
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if pla > 0 then
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local in_range = 0
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local objs = minetest.get_objects_inside_radius(pos, pla)
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for _,oir in pairs(objs) do
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if oir:is_player() then
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in_range = 1
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break
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end
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end
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-- player not found
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if in_range == 0 then
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-- Try again quickly
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timer:start(2)
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return
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end
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end
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--[[ HACK!
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The doll may not stay spawned if the monster spawner is placed far away from
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players, so we will check for its existance periodically when a player is nearby.
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This would happen almost always when the monster spawner is placed by the mapgen.
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This is probably caused by a Minetest bug:
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https://github.com/minetest/minetest/issues/4759
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FIXME: Fix this horrible hack.
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]]
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local doll = find_doll(pos)
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if not doll then
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doll = spawn_doll(pos)
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set_doll_properties(doll, mob)
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end
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-- count mob objects of same type in area
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for k, obj in ipairs(objs) do
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ent = obj:get_luaentity()
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if ent and ent.name and ent.name == mob then
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count = count + 1
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end
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end
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-- Are there too many of same type? then fail
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if count >= num then
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timer:start(math.random(5, 20))
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return
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end
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-- find air blocks within 8×3×8 nodes of spawner
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local air = minetest.find_nodes_in_area(
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{x = pos.x - 4, y = pos.y - 1 + yof, z = pos.z - 4},
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{x = pos.x + 4, y = pos.y + 1 + yof, z = pos.z + 4},
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{"air"})
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-- spawn up to 4 mobs in random air blocks
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if air then
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for a=1, 4 do
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if #air <= 0 then
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-- We're out of space! Stop spawning
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break
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end
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local air_index = math.random(#air)
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local pos2 = air[air_index]
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local lig = minetest.get_node_light(pos2) or 0
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pos2.y = pos2.y + 0.5
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-- only if light levels are within range
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if lig >= mlig and lig <= xlig then
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minetest.add_entity(pos2, mob)
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end
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table.remove(air, air_index)
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end
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end
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-- Spawn attempt done. Next spawn attempt much later
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timer:start(math.random(10, 39.95))
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end
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-- The monster spawner node.
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-- PLACEMENT INSTRUCTIONS:
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-- If this node is placed by a player, minetest.item_place, etc. default settings are applied
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-- automatially.
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-- IF this node is placed by ANY other method (e.g. minetest.set_node, LuaVoxelManip), you
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-- MUST call mcl_mobspawners.setup_spawner right after the spawner has been placed.
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minetest.register_node("mcl_mobspawners:spawner", {
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tiles = {"mob_spawner.png"},
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drawtype = "glasslike",
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paramtype = "light",
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sunlight_propagates = true,
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walkable = true,
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description = S("Monster Spawner"),
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_doc_items_longdesc = S("A monster spawner is a block which regularily causes monsters and animals to appear around it."),
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groups = {pickaxey=1, not_in_creative_inventory = 1, material_stone=1},
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is_ground_content = false,
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drop = "",
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-- If placed by player, setup spawner with default settings
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on_place = function(itemstack, placer, pointed_thing)
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local node_under = minetest.get_node(pointed_thing.under)
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local new_itemstack, success = minetest.item_place(itemstack, placer, pointed_thing)
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if success then
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local placepos
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if minetest.registered_nodes[node_under.name].buildable_to then
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placepos = pointed_thing.under
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else
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placepos = pointed_thing.above
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end
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mcl_mobspawners.setup_spawner(placepos)
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end
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return new_itemstack
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end,
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on_destruct = function(pos)
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local meta = minetest.get_meta(pos)
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local obj = find_doll(pos)
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if obj then
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obj:remove()
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end
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end,
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on_timer = spawn_monsters,
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on_receive_fields = function(pos, formname, fields, sender)
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if not fields.text or fields.text == "" then
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return
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end
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local meta = minetest.get_meta(pos)
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local comm = fields.text:split(" ")
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local name = sender:get_player_name()
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if minetest.is_protected(pos, name) then
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minetest.record_protection_violation(pos, name)
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return
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end
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local mob = comm[1] -- mob to spawn
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local mlig = tonumber(comm[2]) -- min light
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local xlig = tonumber(comm[3]) -- max light
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local num = tonumber(comm[4]) -- total mobs in area
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local pla = tonumber(comm[5]) -- player distance (0 to disable)
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local yof = tonumber(comm[6]) or 0 -- Y offset to spawn mob
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if mob and mob ~= "" and mobs.spawning_mobs[mob] == true
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and num and num >= 0 and num <= 10
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and mlig and mlig >= 0 and mlig <= 15
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and xlig and xlig >= 0 and xlig <= 15
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and pla and pla >=0 and pla <= 20
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and yof and yof > -10 and yof < 10 then
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mcl_mobspawners.setup_spawner(pos, mob, mlig, xlig, num, pla, yof)
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else
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minetest.chat_send_player(name, S("Mob Spawner settings failed!"))
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minetest.chat_send_player(name,
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S("Syntax: name min_light[0-14] max_light[0-14] max_mobs_in_area[0 to disable] distance[1-20] y_offset[-10 to 10]"))
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end
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end,
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sounds = mcl_sounds.node_sound_metal_defaults(),
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_mcl_blast_resistance = 25,
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_mcl_hardness = 5,
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})
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-- Mob spawner doll (rotating icon inside cage)
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local doll_def = {
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hp_max = 1,
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physical = true,
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collisionbox = {0,0,0,0,0,0},
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visual = "mesh",
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makes_footstep_sound = false,
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timer = 0,
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automatic_rotate = math.pi * 2.9,
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_mob = default_mob, -- name of the mob this doll represents
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}
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doll_def.get_staticdata = function(self)
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return self._mob
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end
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doll_def.on_activate = function(self, staticdata, dtime_s)
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local mob = staticdata
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if mob == "" or mob == nil then
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mob = default_mob
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end
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set_doll_properties(self.object, mob)
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self.object:setvelocity({x=0, y=0, z=0})
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self.object:setacceleration({x=0, y=0, z=0})
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self.object:set_armor_groups({immortal=1})
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end
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doll_def.on_step = function(self, dtime)
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-- Check if spawner is still present. If not, delete the entity
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self.timer = self.timer + 0.01
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local n = minetest.get_node_or_nil(self.object:getpos())
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if self.timer > 1 then
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if n and n.name and n.name ~= "mcl_mobspawners:spawner" then
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self.object:remove()
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end
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end
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end
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doll_def.on_punch = function(self, hitter) end
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minetest.register_entity("mcl_mobspawners:doll", doll_def)
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