387 lines
10 KiB
Lua
387 lines
10 KiB
Lua
local S = minetest.get_translator("mcl_mobspawners")
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mcl_mobspawners = {}
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local default_mob = "mobs_mc:pig"
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-- Mob 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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local list = minetest.registered_entities[mob].texture_list
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if type(list[1]) == "table" then
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return list[1]
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else
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return list
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end
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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, 0.5)) 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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-- Manually set the doll sizes for large mobs
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-- TODO: Relocate this code to mobs_mc
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local doll_size_overrides = {
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["mobs_mc:guardian"] = { x = 0.6, y = 0.6 },
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["mobs_mc:guardian_elder"] = { x = 0.72, y = 0.72 },
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["mobs_mc:enderman"] = { x = 0.8, y = 0.8 },
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["mobs_mc:iron_golem"] = { x = 0.9, y = 0.9 },
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["mobs_mc:ghast"] = { x = 1.05, y = 1.05 },
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["mobs_mc:wither"] = { x = 1.2, y = 1.2 },
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["mobs_mc:enderdragon"] = { x = 0.16, y = 0.16 },
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["mobs_mc:witch"] = { x = 0.95, y = 0.95 },
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}
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local spawn_count_overrides = {
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["mobs_mc:enderdragon"] = 1,
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["mobs_mc:wither"] = 1,
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["mobs_mc:ghast"] = 1,
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["mobs_mc:guardian_elder"] = 1,
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["mobs_mc:guardian"] = 2,
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["mobs_mc:iron_golem"] = 2,
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}
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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 xs, ys
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if doll_size_overrides[mob] then
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xs = doll_size_overrides[mob].x
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ys = doll_size_overrides[mob].y
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else
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xs = mobinfo.visual_size.x * 0.33333
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ys = mobinfo.visual_size.y * 0.33333
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end
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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 = xs,
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y = ys,
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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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local function respawn_doll(pos)
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local meta = minetest.get_meta(pos)
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local mob = meta:get_string("Mob")
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local doll
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if mob and mob ~= "" then
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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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end
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return doll
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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 mob 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 or replace existing doll
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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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end
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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 mobs around pos
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-- NOTE: The node is timer-based, rather than ABM-based.
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local spawn_mobs = 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] Mob 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 mob 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 mob 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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local max = 4
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if spawn_count_overrides[mob] then
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max = spawn_count_overrides[mob]
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end
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for a=1, max 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 mob 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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walkable = true,
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description = S("Mob Spawner"),
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_tt_help = S("Makes mobs appear"),
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_doc_items_longdesc = S("A mob spawner regularily causes mobs to appear around it while a player is nearby. Some mob spawners are disabled while in light."),
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_doc_items_usagehelp = S("If you have a spawn egg, you can use it to change the mob to spawn. Just place the item on the mob spawner. Player-set mob spawners always spawn mobs regardless of the light level."),
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groups = {pickaxey=1, material_stone=1, deco_block=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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if pointed_thing.type ~= "node" then
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return itemstack
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end
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-- Use pointed node's on_rightclick function first, if present
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local node = minetest.get_node(pointed_thing.under)
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if placer and not placer:get_player_control().sneak then
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if minetest.registered_nodes[node.name] and minetest.registered_nodes[node.name].on_rightclick then
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return minetest.registered_nodes[node.name].on_rightclick(pointed_thing.under, node, placer, itemstack) or itemstack
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end
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end
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local name = placer:get_player_name()
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local privs = minetest.get_player_privs(name)
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if not privs.maphack then
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minetest.chat_send_player(name, "Placement denied. You need the “maphack” privilege to place mob spawners.")
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return itemstack
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end
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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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-- Remove doll (if any)
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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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mcl_experience.throw_experience(pos, math.random(15, 43))
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end,
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on_punch = function(pos)
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respawn_doll(pos)
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end,
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on_timer = spawn_mobs,
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sounds = mcl_sounds.node_sound_metal_defaults(),
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_mcl_blast_resistance = 5,
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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 = false,
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pointable = false,
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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:set_velocity({x=0, y=0, z=0})
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self.object:set_acceleration({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 + dtime
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local n = minetest.get_node_or_nil(self.object:get_pos())
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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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-- FIXME: Doll can get destroyed by /clearobjects
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minetest.register_lbm({
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label = "Respawn mob spawner dolls",
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name = "mcl_mobspawners:respawn_entities",
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nodenames = { "mcl_mobspawners:spawner" },
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run_at_every_load = true,
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action = function(pos, node)
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respawn_doll(pos)
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end,
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})
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