mods/hopper/abms.lua

   1
   2 -- suck in items on top of hopper
   3 minetest.register_abm({
   4         label = "Hopper suction",
   5         nodenames = {"hopper:hopper", "hopper:hopper_side"},
   6         interval = 0.1,
   7         chance = 1,
   8         action = function(pos, node, active_object_count, active_object_count_wider)
   9                 if active_object_count_wider == 0 then
  10                         return
  11                 end
  12
  13                 local inv = minetest.get_meta(pos):get_inventory()
  14                 local posob
  15
  16                 for _,object in pairs(minetest.get_objects_inside_radius(pos, 1)) do
  17                         if not object:is_player()
  18                         and object:get_luaentity()
  19                         and object:get_luaentity().name == "__builtin:item"
  20                         and inv
  21                         and inv:room_for_item("main",
  22                                 ItemStack(object:get_luaentity().itemstring)) then
  23
  24                                 posob = object:getpos()
  25
  26                                 if math.abs(posob.x - pos.x) <= 0.5
  27                                 and posob.y - pos.y <= 0.85
  28                                 and posob.y - pos.y >= 0.3 then
  29
  30                                         inv:add_item("main",
  31                                                 ItemStack(object:get_luaentity().itemstring))
  32
  33                                         object:get_luaentity().itemstring = ""
  34                                         object:remove()
  35                                 end
  36                         end
  37                 end
  38         end,
  39 })
  40
  41 -- Used to convert side hopper facing into source and destination relative coordinates
  42 -- This was tedious to populate and test
  43 local directions = {
  44         [0]={["src"]={x=0, y=1, z=0},["dst"]={x=-1, y=0, z=0}},
  45         [1]={["src"]={x=0, y=1, z=0},["dst"]={x=0, y=0, z=1}},
  46         [2]={["src"]={x=0, y=1, z=0},["dst"]={x=1, y=0, z=0}},
  47         [3]={["src"]={x=0, y=1, z=0},["dst"]={x=0, y=0, z=-1}},
  48         [4]={["src"]={x=0, y=0, z=1},["dst"]={x=-1, y=0, z=0}},
  49         [5]={["src"]={x=0, y=0, z=1},["dst"]={x=0, y=-1, z=0}},
  50         [6]={["src"]={x=0, y=0, z=1},["dst"]={x=1, y=0, z=0}},
  51         [7]={["src"]={x=0, y=0, z=1},["dst"]={x=0, y=1, z=0}},
  52         [8]={["src"]={x=0, y=0, z=-1},["dst"]={x=-1, y=0, z=0}},
  53         [9]={["src"]={x=0, y=0, z=-1},["dst"]={x=0, y=1, z=0}},
  54         [10]={["src"]={x=0, y=0, z=-1},["dst"]={x=1, y=0, z=0}},
  55         [11]={["src"]={x=0, y=0, z=-1},["dst"]={x=0, y=-1, z=0}},
  56         [12]={["src"]={x=1, y=0, z=0},["dst"]={x=0, y=1, z=0}},
  57         [13]={["src"]={x=1, y=0, z=0},["dst"]={x=0, y=0, z=1}},
  58         [14]={["src"]={x=1, y=0, z=0},["dst"]={x=0, y=-1, z=0}},
  59         [15]={["src"]={x=1, y=0, z=0},["dst"]={x=0, y=0, z=-1}},
  60         [16]={["src"]={x=-1, y=0, z=0},["dst"]={x=0, y=-1, z=0}},
  61         [17]={["src"]={x=-1, y=0, z=0},["dst"]={x=0, y=0, z=1}},
  62         [18]={["src"]={x=-1, y=0, z=0},["dst"]={x=0, y=1, z=0}},
  63         [19]={["src"]={x=-1, y=0, z=0},["dst"]={x=0, y=0, z=-1}},
  64         [20]={["src"]={x=0, y=-1, z=0},["dst"]={x=1, y=0, z=0}},
  65         [21]={["src"]={x=0, y=-1, z=0},["dst"]={x=0, y=0, z=1}},
  66         [22]={["src"]={x=0, y=-1, z=0},["dst"]={x=-1, y=0, z=0}},
  67         [23]={["src"]={x=0, y=-1, z=0},["dst"]={x=0, y=0, z=-1}},
  68 }
  69
  70 local bottomdir = function(facedir)
  71         return ({[0]={x=0, y=-1, z=0},
  72                 {x=0, y=0, z=-1},
  73                 {x=0, y=0, z=1},
  74                 {x=-1, y=0, z=0},
  75                 {x=1, y=0, z=0},
  76                 {x=0, y=1, z=0}})[math.floor(facedir/4)]
  77 end
  78
  79 -- hopper workings
  80 minetest.register_abm({
  81         label = "Hopper transfer",
  82         nodenames = {"hopper:hopper", "hopper:hopper_side"},
  83         neighbors = hopper.neighbors,
  84         interval = 0.1,
  85         chance = 1,
  86         --catch_up = false,
  87
  88         action = function(pos, node, active_object_count, active_object_count_wider)
  89                 local source_pos, destination_pos, destination_dir
  90                 if node.name == "hopper:hopper_side" then
  91                         source_pos = vector.add(pos, directions[node.param2].src)
  92                         destination_dir = directions[node.param2].dst
  93                         destination_pos = vector.add(pos, destination_dir)
  94                 else
  95                         destination_dir = bottomdir(node.param2)
  96                         source_pos = vector.subtract(pos, destination_dir)
  97                         destination_pos = vector.add(pos, destination_dir)
  98                 end
  99
 100                 local output_direction
 101                 if destination_dir.y == 0 then
 102                         output_direction = "horizontal"
 103                 end
 104
 105                 local source_node = minetest.get_node(source_pos)
 106                 local destination_node = minetest.get_node(destination_pos)
 107
 108                 local registered_source_inventories = hopper.get_registered_inventories_for(source_node.name)
 109                 if registered_source_inventories ~= nil then
 110                         hopper.take_item_from(pos, source_pos, source_node, registered_source_inventories["top"])
 111                 end
 112
 113                 local registered_destination_inventories = hopper.get_registered_inventories_for(destination_node.name)
 114                 if registered_destination_inventories ~= nil then
 115                         if output_direction == "horizontal" then
 116                                 hopper.send_item_to(pos, destination_pos, destination_node, registered_destination_inventories["side"])
 117                         else
 118                                 hopper.send_item_to(pos, destination_pos, destination_node, registered_destination_inventories["bottom"])
 119                         end
 120                 else
 121                         hopper.send_item_to(pos, destination_pos, destination_node) -- for handling ejection
 122                 end
 123         end,
 124 })