init.lua

   1 autotool = {}
   2
   3 local function check_tool(stack, node_groups, old_best_time)
   4         local toolcaps = stack:get_tool_capabilities()
   5         if not toolcaps then return end
   6         local best_time = old_best_time
   7         for group, groupdef in pairs(toolcaps.groupcaps) do
   8                 local level = node_groups[group]
   9                 if level then
  10                         local this_time = groupdef.times[level]
  11                         if this_time < best_time then
  12                                 best_time = this_time
  13                         end
  14                 end
  15         end
  16         return best_time < old_best_time, best_time
  17 end
  18
  19 local function find_best_tool(nodename)
  20         local player = minetest.localplayer
  21         local inventory = minetest.get_inventory("current_player")
  22         local node_groups = minetest.get_node_def(nodename).groups
  23         local new_index = player:get_wield_index()
  24         local is_better, best_time = false, math.huge
  25         is_better, best_time = check_tool(player:get_wielded_item(), node_groups, best_time)
  26         is_better, best_time = check_tool(inventory.hand[1], node_groups, best_time)
  27         for index, stack in ipairs(inventory.main) do
  28                 is_better, best_time = check_tool(stack, node_groups, best_time)
  29                 if is_better then
  30                         new_index = index
  31                 end
  32         end
  33         return new_index
  34 end
  35
  36 function autotool.select_best_tool(nodename)
  37         minetest.localplayer:set_wield_index(find_best_tool(nodename))
  38 end
  39
  40 local new_index, old_index, pointed_pos
  41
  42 minetest.register_on_punchnode(function(pos, node)
  43         if minetest.settings:get_bool("autotool") then
  44                 pointed_pos = pos
  45                 old_index = old_index or minetest.localplayer:get_wield_index()
  46                 new_index = find_best_tool(node.name)
  47         end
  48 end)
  49
  50 minetest.register_globalstep(function()
  51         local player = minetest.localplayer
  52         if not new_index then return end
  53         if minetest.settings:get_bool("autotool") then
  54                 local pt = minetest.get_pointed_thing()
  55                 if pt and pt.type == "node" and vector.equals(minetest.get_pointed_thing_position(pt), pointed_pos) and player:get_control().dig then
  56                         player:set_wield_index(new_index)
  57                         return
  58                 end
  59         end
  60         player:set_wield_index(old_index)
  61         new_index, old_index, pointed_pos = nil
  62 end)
  63
  64 minetest.register_cheat("AutoTool", "Inventory", "autotool")