MineClone2/mods/ENTITIES/mobs/spawner.lua

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local S = mobs.intllib
local default_mob = "mobs_mc:chicken"
-- mob spawner
local spawner_default = default_mob.." 10 15 3 0"
local function get_mob_textures(mob)
-- FIXME: Ummm … wtf? Why isn't there a textures attribute?
return minetest.registered_entities[mob].texture_list[1]
end
-- Find doll entity at pos
local function find_doll(pos)
for _,obj in ipairs(minetest.env:get_objects_inside_radius(pos, 1)) do
if not obj:is_player() then
if obj ~= nil and obj:get_luaentity().name == "mobs:spawner_mob_doll" then
return obj
end
end
end
return nil
end
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local function set_doll_properties(doll, mob)
local mobinfo = minetest.registered_entities[mob]
local prop = {
_mob = mob,
mesh = mobinfo.mesh,
textures = get_mob_textures(mob),
visual_size = {
x = mobinfo.visual_size.x * 0.5,
y = mobinfo.visual_size.y * 0.5,
}
}
doll:set_properties(prop)
end
minetest.register_node("mobs:spawner", {
tiles = {"mob_spawner.png"},
drawtype = "glasslike",
paramtype = "light",
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sunlight_propagates = true,
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."),
groups = {pickaxey=1, not_in_creative_inventory = 1, material_stone=1},
is_ground_content = false,
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drop = "",
on_construct = function(pos)
local meta = minetest.get_meta(pos)
-- text entry formspec
meta:set_string("formspec",
"field[text;" .. S("Mob MinLight MaxLight Amount PlayerDist") .. ";${command}]")
meta:set_string("infotext", S("Monster spawner not active (Rightclick to enter settings)"))
meta:set_string("command", spawner_default)
meta:set_int("active", 0)
end,
on_destruct = function(pos)
local obj = find_doll(pos)
obj:remove()
end,
on_right_click = function(pos, placer)
if minetest.is_protected(pos, placer:get_player_name()) then
return
end
end,
on_receive_fields = function(pos, formname, fields, sender)
if not fields.text or fields.text == "" then
return
end
local meta = minetest.get_meta(pos)
local comm = fields.text:split(" ")
local name = sender:get_player_name()
if minetest.is_protected(pos, name) then
minetest.record_protection_violation(pos, name)
return
end
local mob = comm[1] -- mob to spawn
local mlig = tonumber(comm[2]) -- min light
local xlig = tonumber(comm[3]) -- max light
local num = tonumber(comm[4]) -- total mobs in area
local pla = tonumber(comm[5]) -- player distance (0 to disable)
local yof = tonumber(comm[6]) or 0 -- Y offset to spawn mob
if mob and mob ~= "" and mobs.spawning_mobs[mob] == true
and num and num >= 0 and num <= 10
and mlig and mlig >= 0 and mlig <= 15
and xlig and xlig >= 0 and xlig <= 15
and pla and pla >=0 and pla <= 20
and yof and yof > -10 and yof < 10 then
-- Activate monster spawner and disable editing functionality
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meta:set_string("Mob", mob)
meta:set_int("MinLight", mlig)
meta:set_int("MaxLight", xlig)
meta:set_int("MaxMobsInArea", num)
meta:set_int("PlayerDistance", pla)
meta:set_int("YOffset", yof)
meta:set_int("active", 1)
meta:set_string("infotext", "")
meta:set_string("formspec", "")
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meta:set_string("command", "")
-- Create or update doll
local doll = find_doll(pos)
if not doll then
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doll = minetest.add_entity({x=pos.x, y=pos.y-0.3, z=pos.z}, "mobs:spawner_mob_doll")
end
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set_doll_properties(doll, mob)
else
minetest.chat_send_player(name, S("Mob Spawner settings failed!"))
minetest.chat_send_player(name,
S("> name min_light[0-14] max_light[0-14] max_mobs_in_area[0 to disable] distance[1-20] y_offset[-10 to 10]"))
end
end,
sounds = mcl_sounds.node_sound_metal_defaults(),
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_mcl_blast_resistance = 25,
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_mcl_hardness = 5,
})
-- Mob spawner doll (rotating icon inside cage)
local spawner_mob_doll_def = {
hp_max = 1,
physical = true,
collisionbox = {0,0,0,0,0,0},
visual = "mesh",
makes_footstep_sound = false,
timer = 0,
automatic_rotate = math.pi * 2.9,
_mob = default_mob, -- name of the mob this doll represents
}
spawner_mob_doll_def.get_staticdata = function(self)
return self._mob
end
spawner_mob_doll_def.on_activate = function(self, staticdata, dtime_s)
local mob = staticdata
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if mob == "" or mob == nil then
mob = default_mob
end
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set_doll_properties(self.object, mob)
self.object:setvelocity({x=0, y=0, z=0})
self.object:setacceleration({x=0, y=0, z=0})
self.object:set_armor_groups({immortal=1})
end
spawner_mob_doll_def.on_step = function(self, dtime)
-- Check if spawner is still present. If not, delete the entity
self.timer = self.timer + 0.01
local n = minetest.get_node_or_nil(self.object:getpos())
if self.timer > 1 then
if n and n.name and n.name ~= "mobs:spawner" then
self.object:remove()
end
end
end
spawner_mob_doll_def.on_punch = function(self, hitter) end
minetest.register_entity("mobs:spawner_mob_doll", spawner_mob_doll_def)
local max_per_block = tonumber(minetest.setting_get("max_objects_per_block") or 99)
-- spawner abm
minetest.register_abm({
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label = "Monster Spawner spawning a monster",
nodenames = {"mobs:spawner"},
interval = 10,
chance = 4,
catch_up = false,
action = function(pos, node, active_object_count, active_object_count_wider)
-- return if too many entities already
if active_object_count_wider >= max_per_block then
return
end
-- get meta and command
local meta = minetest.get_meta(pos)
local active = meta:get_int("active")
if active == 0 then
-- Spawner not active yet, do nothing
return
end
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-- 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
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minetest.log("error", "[mobs] Monster Spawner: Mob doesn't exist: "..mob)
return
end
-- check objects inside 9x9 area around spawner
local objs = minetest.get_objects_inside_radius(pos, 9)
local count = 0
local ent = nil
-- 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
-- is there too many of same type?
if count >= num then
return
end
-- 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
return
end
end
-- find air blocks within 5 nodes of spawner
local air = minetest.find_nodes_in_area(
{x = pos.x - 5, y = pos.y + yof, z = pos.z - 5},
{x = pos.x + 5, y = pos.y + yof, z = pos.z + 5},
{"air"})
-- spawn in random air block
if air and #air > 0 then
local pos2 = air[math.random(#air)]
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
end
end
})