--this is where mob spawning is defined

--spawn mob in a square doughnut shaped radius
local chance = 20
local tick = 0.2
local timer = 0
--inner and outer part of square donut radius
local inner = 24
local outer = 128

--for debug testing to isolate mobs
local spawn = true

minetest.register_globalstep(function(dtime)
      if spawn then
      timer = timer + dtime
      if timer >= tick and math.random(1,chance) == chance then
            print("ticking")
            timer = 0
            --check through players
            for _,player in ipairs(minetest.get_connected_players()) do
                  --don't spawn near dead players
                  if player:get_hp() > 0 then
                  
                        --local mob_number = math.random(0,2)
                        
                        local int = {-1,1}
                        local pos = vector.floor(vector.add(player:getpos(),0.5))
                        
                        local x,z
                        
                        --this is used to determine the axis buffer from the player
                        local axis = math.random(0,1)
                        
                        --cast towards the direction
                        if axis == 0 then --x
                              x = pos.x + math.random(inner,outer)*int[math.random(1,2)]
                              z = pos.z + math.random(-outer,outer)
                        else --z
                              z = pos.z + math.random(inner,outer)*int[math.random(1,2)]
                              x = pos.x + math.random(-outer,outer)
                        end
                        
                        
                        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"})
                                          
                        --print(dump(spawner))
                        if table.getn(spawner) > 0 then
                              local mob_pos = spawner[1]
                              mob_pos.y = mob_pos.y + 1
                              print("Spawning at: "..minetest.pos_to_string(mob_pos))
                              minetest.add_entity(mob_pos,"mob:pig")
                        end
                  end
            end
      elseif timer > tick then
            timer = 0
      end
      end
end)