forked from VoxeLibre/VoxeLibre
388 lines
10 KiB
Lua
388 lines
10 KiB
Lua
local S = minetest.get_translator("mcl_mobspawners")
|
||
|
||
mcl_mobspawners = {}
|
||
|
||
local default_mob = "mobs_mc:pig"
|
||
|
||
-- Mob spawner
|
||
local spawner_default = default_mob.." 0 15 4 15"
|
||
|
||
local function get_mob_textures(mob)
|
||
local list = minetest.registered_entities[mob].texture_list
|
||
if type(list[1]) == "table" then
|
||
return list[1]
|
||
else
|
||
return list
|
||
end
|
||
end
|
||
|
||
local function find_doll(pos)
|
||
for _,obj in pairs(minetest.get_objects_inside_radius(pos, 0.5)) do
|
||
if not obj:is_player() then
|
||
if obj ~= nil and obj:get_luaentity().name == "mcl_mobspawners:doll" then
|
||
return obj
|
||
end
|
||
end
|
||
end
|
||
return nil
|
||
end
|
||
|
||
local function spawn_doll(pos)
|
||
return minetest.add_entity({x=pos.x, y=pos.y-0.3, z=pos.z}, "mcl_mobspawners:doll")
|
||
end
|
||
|
||
-- Manually set the doll sizes for large mobs
|
||
-- TODO: Relocate this code to mobs_mc
|
||
local doll_size_overrides = {
|
||
["mobs_mc:guardian"] = { x = 0.6, y = 0.6 },
|
||
["mobs_mc:guardian_elder"] = { x = 0.72, y = 0.72 },
|
||
["mobs_mc:enderman"] = { x = 0.8, y = 0.8 },
|
||
["mobs_mc:iron_golem"] = { x = 0.9, y = 0.9 },
|
||
["mobs_mc:ghast"] = { x = 1.05, y = 1.05 },
|
||
["mobs_mc:wither"] = { x = 1.2, y = 1.2 },
|
||
["mobs_mc:enderdragon"] = { x = 0.16, y = 0.16 },
|
||
["mobs_mc:witch"] = { x = 0.95, y = 0.95 },
|
||
}
|
||
local spawn_count_overrides = {
|
||
["mobs_mc:enderdragon"] = 1,
|
||
["mobs_mc:wither"] = 1,
|
||
["mobs_mc:ghast"] = 1,
|
||
["mobs_mc:guardian_elder"] = 1,
|
||
["mobs_mc:guardian"] = 2,
|
||
["mobs_mc:iron_golem"] = 2,
|
||
}
|
||
|
||
local function set_doll_properties(doll, mob)
|
||
local mobinfo = minetest.registered_entities[mob]
|
||
if not mobinfo then return end
|
||
local xs, ys
|
||
if doll_size_overrides[mob] then
|
||
xs = doll_size_overrides[mob].x
|
||
ys = doll_size_overrides[mob].y
|
||
else
|
||
xs = mobinfo.visual_size.x * 0.33333
|
||
ys = mobinfo.visual_size.y * 0.33333
|
||
end
|
||
local prop = {
|
||
mesh = mobinfo.mesh,
|
||
textures = get_mob_textures(mob),
|
||
visual_size = {
|
||
x = xs,
|
||
y = ys,
|
||
}
|
||
}
|
||
doll:set_properties(prop)
|
||
doll:get_luaentity()._mob = mob
|
||
end
|
||
|
||
local function respawn_doll(pos)
|
||
local meta = minetest.get_meta(pos)
|
||
local mob = meta:get_string("Mob")
|
||
local doll
|
||
if mob and mob ~= "" then
|
||
doll = find_doll(pos)
|
||
if not doll then
|
||
doll = spawn_doll(pos)
|
||
set_doll_properties(doll, mob)
|
||
end
|
||
end
|
||
return doll
|
||
end
|
||
|
||
--[[ Public function: Setup the spawner at pos.
|
||
This function blindly assumes there's actually a spawner at pos.
|
||
If not, then the results are undefined.
|
||
All the arguments are optional!
|
||
|
||
* Mob: ID of mob to spawn (default: mobs_mc:pig)
|
||
* MinLight: Minimum light to spawn (default: 0)
|
||
* MaxLight: Maximum light to spawn (default: 15)
|
||
* MaxMobsInArea: How many mobs are allowed in the area around the spawner (default: 4)
|
||
* PlayerDistance: Spawn mobs only if a player is within this distance; 0 to disable (default: 15)
|
||
* YOffset: Y offset to spawn mobs; 0 to disable (default: 0)
|
||
]]
|
||
|
||
function mcl_mobspawners.setup_spawner(pos, Mob, MinLight, MaxLight, MaxMobsInArea, PlayerDistance, YOffset)
|
||
-- Activate mob spawner and disable editing functionality
|
||
if Mob == nil then Mob = default_mob end
|
||
if MinLight == nil then MinLight = 0 end
|
||
if MaxLight == nil then MaxLight = 15 end
|
||
if MaxMobsInArea == nil then MaxMobsInArea = 4 end
|
||
if PlayerDistance == nil then PlayerDistance = 15 end
|
||
if YOffset == nil then YOffset = 0 end
|
||
local meta = minetest.get_meta(pos)
|
||
meta:set_string("Mob", Mob)
|
||
meta:set_int("MinLight", MinLight)
|
||
meta:set_int("MaxLight", MaxLight)
|
||
meta:set_int("MaxMobsInArea", MaxMobsInArea)
|
||
meta:set_int("PlayerDistance", PlayerDistance)
|
||
meta:set_int("YOffset", YOffset)
|
||
|
||
-- Create doll or replace existing doll
|
||
local doll = find_doll(pos)
|
||
if not doll then
|
||
doll = spawn_doll(pos)
|
||
end
|
||
set_doll_properties(doll, Mob)
|
||
|
||
|
||
-- Start spawning very soon
|
||
local t = minetest.get_node_timer(pos)
|
||
t:start(2)
|
||
end
|
||
|
||
-- Spawn mobs around pos
|
||
-- NOTE: The node is timer-based, rather than ABM-based.
|
||
local spawn_mobs = function(pos, elapsed)
|
||
|
||
-- get meta
|
||
local meta = minetest.get_meta(pos)
|
||
|
||
-- get settings
|
||
local mob = meta:get_string("Mob")
|
||
local mlig = meta:get_int("MinLight")
|
||
local xlig = meta:get_int("MaxLight")
|
||
local num = meta:get_int("MaxMobsInArea")
|
||
local pla = meta:get_int("PlayerDistance")
|
||
local yof = meta:get_int("YOffset")
|
||
|
||
-- if amount is 0 then do nothing
|
||
if num == 0 then
|
||
return
|
||
end
|
||
|
||
-- are we spawning a registered mob?
|
||
if not mobs.spawning_mobs[mob] then
|
||
minetest.log("error", "[mcl_mobspawners] Mob Spawner: Mob doesn't exist: "..mob)
|
||
return
|
||
end
|
||
|
||
-- check objects inside 8×8 area around spawner
|
||
local objs = minetest.get_objects_inside_radius(pos, 8)
|
||
local count = 0
|
||
local ent = nil
|
||
|
||
|
||
local timer = minetest.get_node_timer(pos)
|
||
|
||
-- spawn mob if player detected and in range
|
||
if pla > 0 then
|
||
|
||
local in_range = 0
|
||
local objs = minetest.get_objects_inside_radius(pos, pla)
|
||
|
||
for _,oir in pairs(objs) do
|
||
|
||
if oir:is_player() then
|
||
|
||
in_range = 1
|
||
|
||
break
|
||
end
|
||
end
|
||
|
||
-- player not found
|
||
if in_range == 0 then
|
||
-- Try again quickly
|
||
timer:start(2)
|
||
return
|
||
end
|
||
end
|
||
|
||
--[[ HACK!
|
||
The doll may not stay spawned if the mob spawner is placed far away from
|
||
players, so we will check for its existance periodically when a player is nearby.
|
||
This would happen almost always when the mob spawner is placed by the mapgen.
|
||
This is probably caused by a Minetest bug:
|
||
https://github.com/minetest/minetest/issues/4759
|
||
FIXME: Fix this horrible hack.
|
||
]]
|
||
local doll = find_doll(pos)
|
||
if not doll then
|
||
doll = spawn_doll(pos)
|
||
set_doll_properties(doll, mob)
|
||
end
|
||
|
||
-- count mob objects of same type in area
|
||
for k, obj in ipairs(objs) do
|
||
|
||
ent = obj:get_luaentity()
|
||
|
||
if ent and ent.name and ent.name == mob then
|
||
count = count + 1
|
||
end
|
||
end
|
||
|
||
-- Are there too many of same type? then fail
|
||
if count >= num then
|
||
timer:start(math.random(5, 20))
|
||
return
|
||
end
|
||
|
||
-- find air blocks within 8×3×8 nodes of spawner
|
||
local air = minetest.find_nodes_in_area(
|
||
{x = pos.x - 4, y = pos.y - 1 + yof, z = pos.z - 4},
|
||
{x = pos.x + 4, y = pos.y + 1 + yof, z = pos.z + 4},
|
||
{"air"})
|
||
|
||
-- spawn up to 4 mobs in random air blocks
|
||
if air then
|
||
local max = 4
|
||
if spawn_count_overrides[mob] then
|
||
max = spawn_count_overrides[mob]
|
||
end
|
||
for a=1, max do
|
||
if #air <= 0 then
|
||
-- We're out of space! Stop spawning
|
||
break
|
||
end
|
||
local air_index = math.random(#air)
|
||
local pos2 = air[air_index]
|
||
local lig = minetest.get_node_light(pos2) or 0
|
||
|
||
pos2.y = pos2.y + 0.5
|
||
|
||
-- only if light levels are within range
|
||
if lig >= mlig and lig <= xlig then
|
||
minetest.add_entity(pos2, mob)
|
||
end
|
||
table.remove(air, air_index)
|
||
end
|
||
end
|
||
|
||
-- Spawn attempt done. Next spawn attempt much later
|
||
timer:start(math.random(10, 39.95))
|
||
|
||
end
|
||
|
||
-- The mob spawner node.
|
||
-- PLACEMENT INSTRUCTIONS:
|
||
-- If this node is placed by a player, minetest.item_place, etc. default settings are applied
|
||
-- automatially.
|
||
-- IF this node is placed by ANY other method (e.g. minetest.set_node, LuaVoxelManip), you
|
||
-- MUST call mcl_mobspawners.setup_spawner right after the spawner has been placed.
|
||
minetest.register_node("mcl_mobspawners:spawner", {
|
||
tiles = {"mob_spawner.png"},
|
||
drawtype = "glasslike",
|
||
paramtype = "light",
|
||
walkable = true,
|
||
description = S("Mob Spawner"),
|
||
_tt_help = S("Makes mobs appear"),
|
||
_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."),
|
||
_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."),
|
||
groups = {pickaxey=1, material_stone=1, deco_block=1},
|
||
is_ground_content = false,
|
||
drop = "",
|
||
|
||
-- If placed by player, setup spawner with default settings
|
||
on_place = function(itemstack, placer, pointed_thing)
|
||
if pointed_thing.type ~= "node" then
|
||
return itemstack
|
||
end
|
||
|
||
-- Use pointed node's on_rightclick function first, if present
|
||
local node = minetest.get_node(pointed_thing.under)
|
||
if placer and not placer:get_player_control().sneak then
|
||
if minetest.registered_nodes[node.name] and minetest.registered_nodes[node.name].on_rightclick then
|
||
return minetest.registered_nodes[node.name].on_rightclick(pointed_thing.under, node, placer, itemstack) or itemstack
|
||
end
|
||
end
|
||
|
||
local name = placer:get_player_name()
|
||
local privs = minetest.get_player_privs(name)
|
||
if not privs.maphack then
|
||
minetest.chat_send_player(name, "Placement denied. You need the “maphack” privilege to place mob spawners.")
|
||
return itemstack
|
||
end
|
||
local node_under = minetest.get_node(pointed_thing.under)
|
||
local new_itemstack, success = minetest.item_place(itemstack, placer, pointed_thing)
|
||
if success then
|
||
local placepos
|
||
if minetest.registered_nodes[node_under.name].buildable_to then
|
||
placepos = pointed_thing.under
|
||
else
|
||
placepos = pointed_thing.above
|
||
end
|
||
mcl_mobspawners.setup_spawner(placepos)
|
||
end
|
||
return new_itemstack
|
||
end,
|
||
|
||
on_destruct = function(pos)
|
||
-- Remove doll (if any)
|
||
local obj = find_doll(pos)
|
||
if obj then
|
||
obj:remove()
|
||
end
|
||
mcl_experience.throw_experience(pos, math.random(15, 43))
|
||
end,
|
||
|
||
on_punch = function(pos)
|
||
respawn_doll(pos)
|
||
end,
|
||
|
||
on_timer = spawn_mobs,
|
||
|
||
sounds = mcl_sounds.node_sound_metal_defaults(),
|
||
|
||
_mcl_blast_resistance = 5,
|
||
_mcl_hardness = 5,
|
||
})
|
||
|
||
-- Mob spawner doll (rotating icon inside cage)
|
||
|
||
local doll_def = {
|
||
hp_max = 1,
|
||
physical = false,
|
||
pointable = false,
|
||
visual = "mesh",
|
||
makes_footstep_sound = false,
|
||
timer = 0,
|
||
automatic_rotate = math.pi * 2.9,
|
||
|
||
_mob = default_mob, -- name of the mob this doll represents
|
||
}
|
||
|
||
doll_def.get_staticdata = function(self)
|
||
return self._mob
|
||
end
|
||
|
||
doll_def.on_activate = function(self, staticdata, dtime_s)
|
||
local mob = staticdata
|
||
if mob == "" or mob == nil then
|
||
mob = default_mob
|
||
end
|
||
set_doll_properties(self.object, mob)
|
||
self.object:set_velocity({x=0, y=0, z=0})
|
||
self.object:set_acceleration({x=0, y=0, z=0})
|
||
self.object:set_armor_groups({immortal=1})
|
||
|
||
end
|
||
|
||
doll_def.on_step = function(self, dtime)
|
||
-- Check if spawner is still present. If not, delete the entity
|
||
self.timer = self.timer + dtime
|
||
local n = minetest.get_node_or_nil(self.object:get_pos())
|
||
if self.timer > 1 then
|
||
if n and n.name and n.name ~= "mcl_mobspawners:spawner" then
|
||
self.object:remove()
|
||
end
|
||
end
|
||
end
|
||
|
||
doll_def.on_punch = function(self, hitter) end
|
||
|
||
minetest.register_entity("mcl_mobspawners:doll", doll_def)
|
||
|
||
-- FIXME: Doll can get destroyed by /clearobjects
|
||
minetest.register_lbm({
|
||
label = "Respawn mob spawner dolls",
|
||
name = "mcl_mobspawners:respawn_entities",
|
||
nodenames = { "mcl_mobspawners:spawner" },
|
||
run_at_every_load = true,
|
||
action = function(pos, node)
|
||
respawn_doll(pos)
|
||
end,
|
||
})
|
||
|