builtin/item_entity.lua

   1 -- Minetest: builtin/item_entity.lua
   2
   3 function minetest.spawn_item(pos, item)
   4         -- Take item in any format
   5         local stack = ItemStack(item)
   6         local obj = minetest.env:add_entity(pos, "__builtin:item")
   7         obj:get_luaentity():set_item(stack:to_string())
   8         return obj
   9 end
  10
  11 minetest.register_entity("__builtin:item", {
  12         initial_properties = {
  13                 hp_max = 1,
  14                 physical = true,
  15                 collisionbox = {-0.25,-0.25,-0.25, 0.25,0.25,0.25},
  16                 visual = "sprite",
  17                 visual_size = {x=0.5, y=0.5},
  18                 textures = {""},
  19                 spritediv = {x=1, y=1},
  20                 initial_sprite_basepos = {x=0, y=0},
  21                 is_visible = false,
  22         },
  23
  24         itemstring = '',
  25         physical_state = true,
  26
  27         set_item = function(self, itemstring)
  28                 self.itemstring = itemstring
  29                 local stack = ItemStack(itemstring)
  30                 local itemtable = stack:to_table()
  31                 local itemname = nil
  32                 if itemtable then
  33                         itemname = stack:to_table().name
  34                 end
  35                 local item_texture = nil
  36                 if minetest.registered_items[itemname] then
  37                         item_texture = minetest.registered_items[itemname].inventory_image
  38                 end
  39                 item_texture = item_texture or "unknown_item.png"
  40                 self.object:set_properties({
  41                         textures = {item_texture},
  42                         is_visible = true,
  43                 })
  44         end,
  45
  46         get_staticdata = function(self)
  47                 return self.itemstring
  48         end,
  49
  50         on_activate = function(self, staticdata)
  51                 self.itemstring = staticdata
  52                 self.object:set_armor_groups({immortal=1})
  53                 self.object:setvelocity({x=0, y=2, z=0})
  54                 self.object:setacceleration({x=0, y=-10, z=0})
  55                 self:set_item(self.itemstring)
  56         end,
  57
  58         on_step = function(self, dtime)
  59                 local p = self.object:getpos()
  60                 p.y = p.y - 0.3
  61                 local nn = minetest.env:get_node(p).name
  62                 if minetest.registered_nodes[nn].walkable then
  63                         if self.physical_state then
  64                                 self.object:setvelocity({x=0,y=0,z=0})
  65                                 self.object:setacceleration({x=0, y=0, z=0})
  66                                 self.physical_state = false
  67                                 self.object:set_properties({
  68                                         physical = false
  69                                 })
  70                         end
  71                 else
  72                         if not self.physical_state then
  73                                 self.object:setvelocity({x=0,y=0,z=0})
  74                                 self.object:setacceleration({x=0, y=-10, z=0})
  75                                 self.physical_state = true
  76                                 self.object:set_properties({
  77                                         physical = true
  78                                 })
  79                         end
  80                 end
  81         end,
  82
  83         on_punch = function(self, hitter)
  84                 if self.itemstring ~= '' then
  85                         hitter:get_inventory():add_item("main", self.itemstring)
  86                 end
  87                 self.object:remove()
  88         end,
  89 })
  90