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-- The default minetest.item_place_node from item.lua was hard to work with given some of the details
-- of how it handled pointed_thing. It also didn't work right with default:torch and seeds. It was simpler to
-- just copy it here and chop out the special cases that were causing problems, and add some special handling.
-- for nodes that define on_place
-- This specific file is therefore licensed under the LGPL 2.1
--GNU Lesser General Public License, version 2.1
--Copyright (C) 2011-2016 celeron55, Perttu Ahola <celeron55@gmail.com>
--Copyright (C) 2011-2016 Various Minetest developers and contributors
--This program is free software; you can redistribute it and/or modify it under the terms
--of the GNU Lesser General Public License as published by the Free Software Foundation;
--either version 2.1 of the License, or (at your option) any later version.
--This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
--without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
--See the GNU Lesser General Public License for more details:
--https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
-- Mapping from facedir value to index in facedir_to_dir.
digtron.facedir_to_dir_map = {
[0]=1, 2, 3, 4,
5, 2, 6, 4,
6, 2, 5, 4,
1, 5, 3, 6,
1, 6, 3, 5,
1, 4, 3, 2,
}
local function copy_pointed_thing(pointed_thing)
return {
type = pointed_thing.type,
above = vector.new(pointed_thing.above),
under = vector.new(pointed_thing.under),
}
end
local function check_attached_node(p, n)
local def = minetest.registered_nodes[n.name]
local d = {x = 0, y = 0, z = 0}
if def.paramtype2 == "wallmounted" then
-- The fallback vector here is in case 'wallmounted to dir' is nil due
-- to voxelmanip placing a wallmounted node without resetting a
-- pre-existing param2 value that is out-of-range for wallmounted.
-- The fallback vector corresponds to param2 = 0.
d = minetest.wallmounted_to_dir(n.param2) or {x = 0, y = 1, z = 0}
else
d.y = -1
end
local p2 = vector.add(p, d)
local nn = minetest.get_node(p2).name
local def2 = minetest.registered_nodes[nn]
if def2 and not def2.walkable then
return false
end
return true
end
digtron.item_place_node = function(itemstack, placer, place_to, param2)
local def = itemstack:get_definition()
if not def or def.type ~= "node" then
return itemstack, false
end
local pointed_thing = {}
pointed_thing.type = "node"
pointed_thing.above = {x=place_to.x, y=place_to.y, z=place_to.z}
pointed_thing.under = {x=place_to.x, y=place_to.y - 1, z=place_to.z}
-- Handle node-specific on_place calls as best we can.
if def.on_place then
if def.paramtype2 == "facedir" then
pointed_thing.under = vector.add(place_to, minetest.facedir_to_dir(param2))
elseif def.paramtype2 == "wallmounted" then
pointed_thing.under = vector.add(place_to, minetest.wallmounted_to_dir(param2))
end
-- pass a copy of the item stack parameter because on_place might modify it directly and then we can't tell if we succeeded or not
-- though note that some mods do "creative_mode" handling within their own on_place methods, which makes it impossible for Digtron
-- to know what to do in that case - if you're in creative_mode Digtron will place such items but it will think it failed and not
-- deduct them from inventory no matter what Digtron's settings are. Unfortunate, but not very harmful and I have no workaround.
local returnstack, success = def.on_place(ItemStack(itemstack), placer, pointed_thing)
if returnstack:get_count() < itemstack:get_count() then success = true end -- some mods neglect to return a success condition
if success then
-- Override the param2 value to force it to be what Digtron wants
local placed_node = minetest.get_node(place_to)
placed_node.param2 = param2
minetest.set_node(place_to, placed_node)
end
return returnstack, success
end
local oldnode = minetest.get_node_or_nil(place_to)
--this should never happen, digtron is testing for adjacent unloaded nodes before getting here.
if not oldnode then
minetest.log("info", placer:get_player_name() .. " tried to place"
.. " node in unloaded position " .. minetest.pos_to_string(place_to)
.. " using a digtron.")
return itemstack, false
end
local newnode = {name = def.name, param1 = 0, param2 = param2}
if def.place_param2 ~= nil then
newnode.param2 = def.place_param2
end
-- Check if the node is attached and if it can be placed there
if minetest.get_item_group(def.name, "attached_node") ~= 0 and
not check_attached_node(place_to, newnode) then
minetest.log("action", "attached node " .. def.name ..
" can not be placed at " .. minetest.pos_to_string(place_to))
return itemstack, false
end
-- Add node and update
minetest.add_node(place_to, newnode)
local take_item = true
-- Run callback
if def.after_place_node then
-- Deepcopy place_to and pointed_thing because callback can modify it
local place_to_copy = {x=place_to.x, y=place_to.y, z=place_to.z}
local pointed_thing_copy = copy_pointed_thing(pointed_thing)
if def.after_place_node(place_to_copy, placer, itemstack,
pointed_thing_copy) then
take_item = false
end
end
-- Run script hook
local _, callback
for _, callback in ipairs(minetest.registered_on_placenodes) do
-- Deepcopy pos, node and pointed_thing because callback can modify them
local place_to_copy = {x=place_to.x, y=place_to.y, z=place_to.z}
local newnode_copy = {name=newnode.name, param1=newnode.param1, param2=newnode.param2}
local oldnode_copy = {name=oldnode.name, param1=oldnode.param1, param2=oldnode.param2}
local pointed_thing_copy = copy_pointed_thing(pointed_thing)
if callback(place_to_copy, newnode_copy, placer, oldnode_copy, itemstack, pointed_thing_copy) then
take_item = false
end
end
if take_item then
itemstack:take_item()
end
return itemstack, true
end
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