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 = {-0.17,-0.17,-0.17, 0.17,0.17,0.17},
  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                 local item_type = ""
  37                 if minetest.registered_items[itemname] then
  38                         item_texture = minetest.registered_items[itemname].inventory_image
  39                         item_type = minetest.registered_items[itemname].type
  40                 end
  41                 prop = {
  42                         is_visible = true,
  43                         visual = "sprite",
  44                         textures = {"unknown_item.png"}
  45                 }
  46                 if item_texture and item_texture ~= "" then
  47                         prop.visual = "sprite"
  48                         prop.textures = {item_texture}
  49                         prop.visual_size = {x=0.50, y=0.50}
  50                 else
  51                         prop.visual = "wielditem"
  52                         prop.textures = {itemname}
  53                         prop.visual_size = {x=0.20, y=0.20}
  54                         prop.automatic_rotate = math.pi * 0.25
  55                 end
  56                 self.object:set_properties(prop)
  57         end,
  58
  59         get_staticdata = function(self)
  60                 --return self.itemstring
  61                 return minetest.serialize({
  62                         itemstring = self.itemstring,
  63                         always_collect = self.always_collect,
  64                 })
  65         end,
  66
  67         on_activate = function(self, staticdata)
  68                 if string.sub(staticdata, 1, string.len("return")) == "return" then
  69                         local data = minetest.deserialize(staticdata)
  70                         if data and type(data) == "table" then
  71                                 self.itemstring = data.itemstring
  72                                 self.always_collect = data.always_collect
  73                         end
  74                 else
  75                         self.itemstring = staticdata
  76                 end
  77                 self.object:set_armor_groups({immortal=1})
  78                 self.object:setvelocity({x=0, y=2, z=0})
  79                 self.object:setacceleration({x=0, y=-10, z=0})
  80                 self:set_item(self.itemstring)
  81         end,
  82
  83         on_step = function(self, dtime)
  84                 local p = self.object:getpos()
  85                 p.y = p.y - 0.3
  86                 local nn = minetest.env:get_node(p).name
  87                 -- If node is not registered or node is walkably solid and resting on nodebox
  88                 local v = self.object:getvelocity()
  89                 if not minetest.registered_nodes[nn] or minetest.registered_nodes[nn].walkable and v.y == 0 then
  90                         if self.physical_state then
  91                                 self.object:setvelocity({x=0,y=0,z=0})
  92                                 self.object:setacceleration({x=0, y=0, z=0})
  93                                 self.physical_state = false
  94                                 self.object:set_properties({
  95                                         physical = false
  96                                 })
  97                         end
  98                 else
  99                         if not self.physical_state then
 100                                 self.object:setvelocity({x=0,y=0,z=0})
 101                                 self.object:setacceleration({x=0, y=-10, z=0})
 102                                 self.physical_state = true
 103                                 self.object:set_properties({
 104                                         physical = true
 105                                 })
 106                         end
 107                 end
 108         end,
 109
 110         on_punch = function(self, hitter)
 111                 if self.itemstring ~= '' then
 112                         local left = hitter:get_inventory():add_item("main", self.itemstring)
 113                         if not left:is_empty() then
 114                                 return
 115                         end
 116                 end
 117                 self.object:remove()
 118         end,
 119 })
 120