Make it possible to place maps

init.lua

@@ -741,12 +741,145 @@ minetest.register_globalstep(
 	end
 )
 
+minetest.register_entity(
+	"xmaps:map",
+	{
+		visual = "upright_sprite",
+		visual_size = { x = 1, y = 1 },
+		physical = false,
+		collide_with_objects = false,
+		textures = { "xmaps_map.tga" },
+		on_activate = function(self, staticdata)
+			if (
+				staticdata and
+				"" ~= staticdata
+			) then
+				local data = minetest.deserialize(staticdata)
+				if not data then
+					return
+				end
+
+				self._wallmounted = data._wallmounted
+				assert( self._wallmounted )
+
+				self._itemstring = data._itemstring
+				assert( self._itemstring )
+
+				local itemstack = ItemStack(self._itemstring)
+				local texture, itemstack = xmaps.load_map_item(itemstack)
+				self._itemstring = itemstack:to_string()
+
+				local min, max = -8/16, 8/16
+				local len = 1/64
+				local sbox
+				if 2 == self._wallmounted then
+					sbox = { -len, min, min, len, max, max }
+				elseif 3 == self._wallmounted then
+					sbox = { -len, min, min, len, max, max }
+				elseif 4 == self._wallmounted then
+					sbox = { min, min, -len, max, max, len }
+				elseif 5 == self._wallmounted then
+					sbox = { min, min, -len, max, max, len }
+				end
+				assert( sbox )
+
+				self.object:set_properties({
+				      selectionbox = sbox,
+				      textures = { texture },
+				})
+
+				local yaw = minetest.dir_to_yaw(
+					minetest.wallmounted_to_dir(
+						self._wallmounted
+					)
+				)
+				self.object:set_yaw(yaw)
+			end
+		end,
+		get_staticdata = function(self)
+			return minetest.serialize(
+				{
+					_wallmounted = self._wallmounted,
+					_itemstring = self._itemstring,
+				}
+			)
+		end,
+		on_punch = function(self)
+			-- TODO: implement protection
+			local pos = self.object:get_pos()
+			local itemstring = self._itemstring
+			if pos and itemstring then
+				minetest.add_item(
+					pos,
+					itemstring
+				)
+				self.object:remove()
+			end
+		end
+	}
+)
+
 minetest.register_craftitem(
 	"xmaps:map",
 	{
 		description = "Map",
 		inventory_image = "xmaps_map.tga",
 		groups = { not_in_creative_inventory = 1 },
+		on_place = function(itemstack, player, pointed_thing)
+			if "node" ~= pointed_thing.type then
+				return
+			end
+
+			local player_pos = player:get_pos()
+			if not player_pos then
+				return
+			end
+
+			local node_pos = pointed_thing.under
+
+			local direction = vector.normalize(
+				vector.subtract(
+					node_pos,
+					player_pos
+				)
+			)
+			local wallmounted = minetest.dir_to_wallmounted(
+				direction
+			)
+
+			-- TODO: implement maps on floor or ceiling
+			if wallmounted < 2 then
+				return
+			end
+
+			direction = minetest.wallmounted_to_dir(
+				wallmounted
+			)
+			local pos = vector.subtract(
+				node_pos,
+				vector.multiply(
+					direction,
+					1/2 + 1/256 -- avoid z-fighting
+				)
+			)
+			local itemstring = itemstack:to_string()
+			if pos and "" ~= itemstring then
+				local staticdata = {
+					_wallmounted = wallmounted,
+					_itemstring = itemstring,
+				}
+				local obj = minetest.add_entity(
+					pos,
+					"xmaps:map",
+					minetest.serialize(staticdata)
+				)
+				if obj then
+					-- TODO: creative mode
+					itemstack:take_item()
+				end
+			end
+			return itemstack
+		end
 	}
 )