421 lines
13 KiB
Lua
421 lines
13 KiB
Lua
--[[
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Tube Library 2
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==============
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Copyright (C) 2017-2020 Joachim Stolberg
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LGPLv2.1+
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See LICENSE.txt for more information
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tube_api.lua
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]]--
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-- Version for compatibility checks, see readme.md/history
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tubelib2.version = 1.9
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-- for lazy programmers
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local S = function(pos) if pos then return minetest.pos_to_string(pos) end end
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local M = minetest.get_meta
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-- Load support for intllib.
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local MP = minetest.get_modpath("tubelib2")
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local I,_ = dofile(MP.."/intllib.lua")
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local Dir2Str = {"north", "east", "south", "west", "down", "up"}
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function tubelib2.dir_to_string(dir)
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return Dir2Str[dir]
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end
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local function Tbl(list)
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local tbl = {}
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for _,item in ipairs(list) do
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tbl[item] = true
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end
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return tbl
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end
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-- Tubelib2 Class
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local Tube = tubelib2.Tube
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local Turn180Deg = tubelib2.Turn180Deg
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local Dir6dToVector = tubelib2.Dir6dToVector
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local function get_pos(pos, dir)
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return vector.add(pos, Dir6dToVector[dir or 0])
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end
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tubelib2.get_pos = get_pos
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function tubelib2.get_node_lvm(pos)
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local node = minetest.get_node_or_nil(pos)
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if node then
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return node
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end
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local vm = minetest.get_voxel_manip()
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local MinEdge, MaxEdge = vm:read_from_map(pos, pos)
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local data = vm:get_data()
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local param2_data = vm:get_param2_data()
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local area = VoxelArea:new({MinEdge = MinEdge, MaxEdge = MaxEdge})
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local idx = area:indexp(pos)
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node = {
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name = minetest.get_name_from_content_id(data[idx]),
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param2 = param2_data[idx]
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}
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return node
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end
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local function update1(self, pos, dir)
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local fpos,fdir = self:walk_tube_line(pos, dir)
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self:infotext(get_pos(pos, dir), fpos)
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self:infotext(fpos, get_pos(pos, dir))
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-- Translate pos/dir pointing to the secondary node into
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-- spos/sdir of the secondary node pointing to the tube.
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if fpos and fdir then
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local spos, sdir = get_pos(fpos,fdir), Turn180Deg[fdir]
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self:del_from_cache(spos, sdir)
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self:add_to_cache(pos, dir, spos, sdir)
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self:add_to_cache(spos, sdir, pos, dir)
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self:update_secondary_node(pos, dir, spos, sdir)
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self:update_secondary_node(spos, sdir, pos, dir)
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end
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end
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local function update2(self, pos1, dir1, pos2, dir2)
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local fpos1,fdir1 = self:walk_tube_line(pos1, dir1)
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local fpos2,fdir2 = self:walk_tube_line(pos2, dir2)
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if not fdir1 or not fdir2 then -- line to long?
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-- reset next tube(s) to head tube(s) again
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local param2 = self:encode_param2(dir1, dir2, 2)
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self:update_after_dig_tube(pos1, param2)
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M(get_pos(pos1, dir1)):set_string("infotext", I("Maximum length reached!"))
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M(get_pos(pos1, dir2)):set_string("infotext", I("Maximum length reached!"))
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return false
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end
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self:infotext(fpos1, fpos2)
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self:infotext(fpos2, fpos1)
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-- Translate fpos/fdir pointing to the secondary node into
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-- spos/sdir of the secondary node pointing to the tube.
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local spos1, sdir1 = get_pos(fpos1,fdir1), Turn180Deg[fdir1]
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local spos2, sdir2 = get_pos(fpos2,fdir2), Turn180Deg[fdir2]
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self:del_from_cache(spos1, sdir1)
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self:del_from_cache(spos2, sdir2)
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self:add_to_cache(spos1, sdir1, spos2, sdir2)
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self:add_to_cache(spos2, sdir2, spos1, sdir1)
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self:update_secondary_node(spos1, sdir1, spos2, sdir2)
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self:update_secondary_node(spos2, sdir2, spos1, sdir1)
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return true
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end
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local function update3(self, pos, dir1, dir2)
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if pos and dir1 and dir2 then
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local fpos1,fdir1,cnt1 = self:walk_tube_line(pos, dir1)
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local fpos2,fdir2,cnt2 = self:walk_tube_line(pos, dir2)
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self:infotext(fpos1, fpos2)
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self:infotext(fpos2, fpos1)
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-- Translate fpos/fdir pointing to the secondary node into
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-- spos/sdir of the secondary node pointing to the tube.
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if fpos1 and fpos2 and fdir1 and fdir2 then
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local spos1, sdir1 = get_pos(fpos1,fdir1), Turn180Deg[fdir1]
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local spos2, sdir2 = get_pos(fpos2,fdir2), Turn180Deg[fdir2]
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self:del_from_cache(spos1, sdir1)
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self:del_from_cache(spos2, sdir2)
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self:add_to_cache(spos1, sdir1, spos2, sdir2)
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self:add_to_cache(spos2, sdir2, spos1, sdir1)
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self:update_secondary_node(spos1, sdir1, spos2, sdir2)
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self:update_secondary_node(spos2, sdir2, spos1, sdir1)
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return dir1, dir2, fpos1, fpos2, fdir1, fdir2, cnt1 or 0, cnt2 or 0
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end
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return dir1, dir2, pos, pos, dir1, dir2, cnt1 or 0, cnt2 or 0
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end
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end
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local function update_secondary_nodes_after_node_placed(self, pos, dirs)
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dirs = dirs or self.dirs_to_check
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-- check surrounding for secondary nodes
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for _,dir in ipairs(dirs) do
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local tmp, npos
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if self.force_to_use_tubes then
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tmp, npos = self:get_special_node(pos, dir)
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else
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tmp, npos = self:get_secondary_node(pos, dir)
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end
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if npos then
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self:update_secondary_node(npos, Turn180Deg[dir], pos, dir)
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self:update_secondary_node(pos, dir, npos, Turn180Deg[dir])
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end
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end
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end
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local function update_secondary_nodes_after_node_dug(self, pos, dirs)
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dirs = dirs or self.dirs_to_check
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-- check surrounding for secondary nodes
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for _,dir in ipairs(dirs) do
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local tmp, npos
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if self.force_to_use_tubes then
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tmp, npos = self:get_special_node(pos, dir)
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else
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tmp, npos = self:get_secondary_node(pos, dir)
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end
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if npos then
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self:update_secondary_node(npos, Turn180Deg[dir])
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self:update_secondary_node(pos, dir)
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end
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end
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end
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--
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-- API Functions
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--
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function Tube:new(attr)
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local o = {
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dirs_to_check = attr.dirs_to_check or {1,2,3,4,5,6},
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max_tube_length = attr.max_tube_length or 1000,
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primary_node_names = Tbl(attr.primary_node_names or {}),
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secondary_node_names = Tbl(attr.secondary_node_names or {}),
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show_infotext = attr.show_infotext or false,
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force_to_use_tubes = attr.force_to_use_tubes or false,
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clbk_after_place_tube = attr.after_place_tube,
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tube_type = attr.tube_type or "unknown",
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pairingList = {}, -- teleporting nodes
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connCache = {}, -- connection cache {pos1 = {dir1 = {pos2 = pos2, dir2 = dir2},...}
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special_node_names = {}, -- use add_special_node_names() to register nodes
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debug_info = attr.debug_info, -- debug_info(pos, text)
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}
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o.valid_dirs = Tbl(o.dirs_to_check)
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setmetatable(o, self)
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self.__index = self
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return o
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end
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-- Register (foreign) tubelib compatible nodes.
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function Tube:add_secondary_node_names(names)
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for _,name in ipairs(names) do
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self.secondary_node_names[name] = true
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end
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end
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-- Register further nodes, which should be updated after
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-- a node/tube is placed/dug
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function Tube:add_special_node_names(names)
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for _,name in ipairs(names) do
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self.special_node_names[name] = true
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end
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end
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-- Called for each connected node when the tube connection has been changed.
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-- func(node, pos, out_dir, peer_pos, peer_in_dir)
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function Tube:register_on_tube_update(update_secondary_node)
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self.clbk_update_secondary_node = update_secondary_node
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end
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function Tube:get_pos(pos, dir)
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return vector.add(pos, Dir6dToVector[dir or 0])
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end
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-- To be called after a secondary node is placed.
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-- dirs is a list with valid dirs, like: {1,2,3,4}
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function Tube:after_place_node(pos, dirs)
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-- [s][f]----[n] x
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-- s..secondary, f..far, n..near, x..node to be placed
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for _,dir in ipairs(self:update_after_place_node(pos, dirs)) do
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if pos and dir then
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update1(self, pos, dir)
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end
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end
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update_secondary_nodes_after_node_placed(self, pos, dirs)
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end
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-- To be called after a tube/primary node is placed.
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-- Returns false, if placing is not allowed
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function Tube:after_place_tube(pos, placer, pointed_thing)
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-- [s1][f1]----[n1] x [n2]-----[f2][s2]
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-- s..secondary, f..far, n..near, x..node to be placed
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local res,dir1,dir2 = self:update_after_place_tube(pos, placer, pointed_thing)
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if res then -- node placed?
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return update2(self, pos, dir1, pos, dir2)
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end
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return res
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end
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function Tube:after_dig_node(pos, dirs)
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-- [s][f]----[n] x
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-- s..secondary, f..far, n..near, x..node to be removed
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for _,dir in ipairs(self:update_after_dig_node(pos, dirs)) do
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update1(self, pos, dir)
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end
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update_secondary_nodes_after_node_dug(self, pos, dirs)
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end
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-- To be called after a tube/primary node is removed.
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function Tube:after_dig_tube(pos, oldnode)
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-- [s1][f1]----[n1] x [n2]-----[f2][s2]
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-- s..secondary, f..far, n..near, x..node to be removed
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-- update tubes
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if oldnode and oldnode.param2 then
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local dir1, dir2 = self:update_after_dig_tube(pos, oldnode.param2)
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if dir1 then update1(self, pos, dir1) end
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if dir2 then update1(self, pos, dir2) end
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-- Update secondary nodes, if right beside
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dir1, dir2 = self:decode_param2(pos, oldnode.param2)
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local npos1,ndir1 = get_pos(pos, dir1),Turn180Deg[dir1]
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local npos2,ndir2 = get_pos(pos, dir2),Turn180Deg[dir2]
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self:del_from_cache(npos1,ndir1)
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self:update_secondary_node(npos1,ndir1)
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self:update_secondary_node(npos2,ndir2)
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end
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end
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-- From source node to destination node via tubes.
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-- pos is the source node position, dir the output dir
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-- The returned pos is the destination position, dir
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-- is the direction into the destination node.
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function Tube:get_connected_node_pos(pos, dir)
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local key = S(pos)
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if self.connCache[key] and self.connCache[key][dir] then
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local item = self.connCache[key][dir]
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return item.pos2, Turn180Deg[item.dir2]
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end
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local fpos,fdir = self:walk_tube_line(pos, dir)
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local spos = get_pos(fpos,fdir)
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self:add_to_cache(pos, dir, spos, Turn180Deg[fdir])
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self:add_to_cache(spos, Turn180Deg[fdir], pos, dir)
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return spos, fdir
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end
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-- Check if node at given position is a tubelib2 compatible node,
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-- able to receive and/or deliver items.
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-- If dir == nil then node_pos = pos
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-- Function returns the result (true/false), new pos, and the node
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function Tube:compatible_node(pos, dir)
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local npos = vector.add(pos, Dir6dToVector[dir or 0])
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local node = self:get_node_lvm(npos)
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return self.secondary_node_names[node.name], npos, node
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end
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-- To be called from a repair tool in the case of a "WorldEdit" or with
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-- legacy nodes corrupted tube line.
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function Tube:tool_repair_tube(pos)
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local param2 = self:get_primary_node_param2(pos)
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if param2 then
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local dir1, dir2 = self:decode_param2(pos, param2)
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return update3(self, pos, dir1, dir2)
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end
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end
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-- To be called from a repair tool in the case, tube nodes are "unbreakable".
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function Tube:tool_remove_tube(pos, sound)
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if self:is_primary_node(pos) then
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local _,node = self:get_node(pos)
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minetest.sound_play({name=sound},{
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pos=pos,
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gain=1,
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max_hear_distance=5,
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loop=false})
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minetest.remove_node(pos)
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self:after_dig_tube(pos, node)
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return true
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end
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return false
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end
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function Tube:prepare_pairing(pos, tube_dir, sFormspec)
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local meta = M(pos)
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if meta:get_int("tube_dir") ~= 0 then -- already prepared?
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-- update tube_dir only
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meta:set_int("tube_dir", tube_dir)
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elseif tube_dir then
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meta:set_int("tube_dir", tube_dir)
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meta:set_string("channel", nil)
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meta:set_string("infotext", I("Pairing is missing"))
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meta:set_string("formspec", sFormspec)
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else
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meta:set_string("infotext", I("Connection to a tube is missing!"))
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end
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end
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function Tube:pairing(pos, channel)
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if self.pairingList[channel] and not vector.equals(pos, self.pairingList[channel]) then
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-- store peer position on both nodes
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local peer_pos = self.pairingList[channel]
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local tube_dir1 = self:store_teleport_data(pos, peer_pos)
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local tube_dir2 = self:store_teleport_data(peer_pos, pos)
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update2(self, pos, tube_dir1, peer_pos, tube_dir2)
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self.pairingList[channel] = nil
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return true
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else
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self.pairingList[channel] = pos
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local meta = M(pos)
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meta:set_string("channel", channel)
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meta:set_string("infotext", I("Pairing is missing").." ("..channel..")")
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return false
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end
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end
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function Tube:stop_pairing(pos, oldmetadata, sFormspec)
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-- unpair peer node
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if oldmetadata and oldmetadata.fields then
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if oldmetadata.fields.tele_pos then
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local tele_pos = minetest.string_to_pos(oldmetadata.fields.tele_pos)
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local peer_meta = M(tele_pos)
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if peer_meta then
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self:after_dig_node(tele_pos, {peer_meta:get_int("tube_dir")})
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peer_meta:set_string("channel", nil)
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peer_meta:set_string("tele_pos", nil)
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peer_meta:set_string("formspec", sFormspec)
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peer_meta:set_string("infotext", I("Pairing is missing"))
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end
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elseif oldmetadata.fields.channel then
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self.pairingList[oldmetadata.fields.channel] = nil
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end
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end
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end
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-- Used by chat commands, when tubes are placed e.g. via WorldEdit
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function Tube:replace_tube_line(pos1, pos2)
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if pos1 and pos2 and not vector.equals(pos1, pos2) then
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local check = (((pos1.x == pos2.x) and 1) or 0) +
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(((pos1.y == pos2.y) and 1) or 0) +
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(((pos1.z == pos2.z) and 1) or 0)
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if check == 2 then
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local v = vector.direction(pos1, pos2)
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local dir1 = self:vector_to_dir(v)
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local dir2 = Turn180Deg[dir1]
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self:replace_nodes(pos1, pos2, dir1, dir2)
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update3(self, pos1, dir1, dir2)
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end
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end
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end
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-- Used to change the tube nodes texture (e.g. on/off state)
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function Tube:switch_tube_line(pos, dir, state)
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self:switch_nodes(pos, dir, state)
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end
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-- Generator function to iterate over a tube line
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-- Returns for each tube: i , pos, node
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function Tube:get_tube_line(pos, dir)
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if pos and dir then
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self.ref = {pos = pos, dir = dir}
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return function(self, i)
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if i < self.max_tube_length then
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local new_pos, new_dir, num = self:get_next_tube(self.ref.pos, self.ref.dir)
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if new_pos then
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self.ref.pos, self.ref.dir = new_pos, new_dir
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i = i + 1
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return i, self.ref.pos, self.node
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end
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end
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end, self, 0
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end
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end
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