mods/mob/spawning.lua

   1 --this is where mob spawning is defined
   2
   3 --spawn mob in a square doughnut shaped radius
   4 local chance = 20
   5 local tick = 0.2
   6 local timer = 0
   7 --inner and outer part of square donut radius
   8 local inner = 24
   9 local outer = 128
  10
  11 --for debug testing to isolate mobs
  12 local spawn = true
  13
  14 minetest.register_globalstep(function(dtime)
  15         if spawn then
  16         timer = timer + dtime
  17         if timer >= tick and math.random(1,chance) == chance then
  18                 --print("ticking")
  19                 timer = 0
  20                 --check through players
  21                 for _,player in ipairs(minetest.get_connected_players()) do
  22                         --don't spawn near dead players
  23                         if player:get_hp() > 0 then
  24
  25                                 --local mob_number = math.random(0,2)
  26
  27                                 local int = {-1,1}
  28                                 local pos = vector.floor(vector.add(player:getpos(),0.5))
  29
  30                                 local x,z
  31
  32                                 --this is used to determine the axis buffer from the player
  33                                 local axis = math.random(0,1)
  34
  35                                 --cast towards the direction
  36                                 if axis == 0 then --x
  37                                         x = pos.x + math.random(inner,outer)*int[math.random(1,2)]
  38                                         z = pos.z + math.random(-outer,outer)
  39                                 else --z
  40                                         z = pos.z + math.random(inner,outer)*int[math.random(1,2)]
  41                                         x = pos.x + math.random(-outer,outer)
  42                                 end
  43
  44
  45                                 local spawner = minetest.find_nodes_in_area_under_air(vector.new(x,pos.y-32,z), vector.new(x,pos.y+32,z), {"main:grass","main:sand","main:water"})
  46
  47                                 --print(dump(spawner))
  48                                 if table.getn(spawner) > 0 then
  49                                         local mob_pos = spawner[1]
  50                                         mob_pos.y = mob_pos.y + 1
  51                                         --print("Spawning at: "..minetest.pos_to_string(mob_pos))
  52                                         minetest.add_entity(mob_pos,"mob:pig")
  53                                 end
  54                         end
  55                 end
  56         elseif timer > tick then
  57                 timer = 0
  58         end
  59         end
  60 end)