tubelib2/tube_api.lua
Joachim Stolberg fe72e64762 pairing bugfix
2018-11-30 22:00:37 +01:00

222 lines
6.6 KiB
Lua

--[[
Tube Library 2
==============
Copyright (C) 2017-2018 Joachim Stolberg
LGPLv2.1+
See LICENSE.txt for more information
tube_api.lua
]]--
-- Version for compatibility checks, see readme.md/history
tubelib2.version = 0.4
-- for lazy programmers
local S = function(pos) if pos then return minetest.pos_to_string(pos) end end
local M = minetest.get_meta
local Dir2Str = {"north", "east", "south", "west", "down", "up"}
function tubelib2.dir_to_string(dir)
return Dir2Str[dir]
end
local function Tbl(list)
local tbl = {}
for _,item in ipairs(list) do
tbl[item] = true
end
return tbl
end
-- Tubelib2 Class
tubelib2.Tube = {}
local Tube = tubelib2.Tube
--
-- API Functions
--
function Tube:new(attr)
local o = {
dirs_to_check = attr.dirs_to_check or {1,2,3,4,5,6},
max_tube_length = attr.max_tube_length or 1000,
primary_node_names = Tbl(attr.primary_node_names or {}),
secondary_node_names = Tbl(attr.secondary_node_names or {}),
show_infotext = attr.show_infotext or false,
clbk_after_place_tube = attr.after_place_tube,
pairingList = {}, -- teleporting nodes
}
o.valid_dirs = Tbl(o.dirs_to_check)
setmetatable(o, self)
self.__index = self
return o
end
-- Register (foreign) tubelib compatible nodes.
function Tube:add_secondary_node_names(names)
for _,name in ipairs(names) do
self.secondary_node_names[name] = true
end
end
-- To be called after a secondary node is placed.
-- dirs is a list with valid dirs, like: {1,2,3,4}
function Tube:after_place_node(pos, dirs)
-- [s][f]----[n] x
-- s..secondary, f..far, n..near, x..node to be placed
for _,dir in ipairs(self:update_after_place_node(pos, dirs)) do
local fpos,fdir = self:repair_meta(pos, dir)
local npos, ndir = self:get_pos(pos, dir)
self:update_secondary_node(fpos,fdir, npos,ndir)
self:update_secondary_node(npos,ndir, fpos,fdir)
end
end
-- To be called after a tube/primary node is placed.
-- Returns false, if placing is not allowed
function Tube:after_place_tube(pos, placer, pointed_thing)
-- [s1][f1]----[n1] x [n2]-----[f2][s2]
-- s..secondary, f..far, n..near, x..node to be placed
local res,dir1,dir2,cnt = self:update_after_place_tube(pos, placer, pointed_thing)
if res and cnt > 0 then -- other nodes around?
local fpos1,fdir1 = self:del_meta(pos, dir1)
local fpos2,fdir2 = self:del_meta(pos, dir2)
self:add_meta(fpos1, fpos2,fdir2)
self:add_meta(fpos2, fpos1,fdir1)
self:update_secondary_node(fpos1,fdir1, fpos2,fdir2)
self:update_secondary_node(fpos2,fdir2, fpos1,fdir1)
end
return res
end
function Tube:after_dig_node(pos, dirs)
-- [s][f]----[n] x
-- s..secondary, f..far, n..near, x..node to be removed
for _,dir in ipairs(self:update_after_dig_node(pos, dirs)) do
local fpos,fdir = self:get_meta(pos, dir)
local npos,ndir = self:get_pos(pos, dir)
self:add_meta(npos, fpos,fdir)
self:add_meta(fpos, npos,ndir)
self:update_secondary_node(fpos,fdir, npos,ndir)
end
end
function Tube:after_dig_tube(pos, oldnode, oldmetadata)
-- [s1][f1]----[n1] x [n2]-----[f2][s2]
-- s..secondary, f..far, n..near, x..node to be removed
for _,dir in ipairs(self:update_after_dig_tube(pos, oldnode.param2)) do
local fpos,fdir = self:get_oldmeta(pos, dir, oldmetadata)
local npos,ndir = self:get_pos(pos, dir)
self:add_meta(npos, fpos,fdir)
self:add_meta(fpos, npos,ndir)
self:update_secondary_node(fpos,fdir, npos,ndir)
end
self:update_secondary_nodes_after_dig_tube(pos)
end
-- From source node to destination node via tubes.
-- pos is the source node position, dir the output dir
-- The returned pos is the destination position, dir
-- is the direction into the destination node.
function Tube:get_connected_node_pos(pos, dir)
local fpos,fdir = self:repair_meta(pos, dir)
local npos,ndir = self:get_pos(fpos,fdir)
-- only one tube with wrong dir info?
if vector.equals(pos, npos) then
fpos,fdir = self:del_meta(pos, dir)
return self:get_pos(fpos,fdir)
end
return npos, dir
end
-- To be called from a repair tool in the case of a "WorldEdit" or with
-- legacy nodes corrupted tube line.
function Tube:tool_repair_tube(pos)
local res,dir1,dir2 = self:determine_next_node(pos)
if res then
local fpos1,fdir1,cnt1 = self:repair_tube_line(pos, dir1)
local fpos2,fdir2,cnt2 = self:repair_tube_line(pos, dir2)
self:add_meta(fpos1, fpos2,fdir2)
self:add_meta(fpos2, fpos1,fdir1)
self:update_secondary_node(fpos1,fdir1, fpos2,fdir2)
self:update_secondary_node(fpos2,fdir2, fpos1,fdir1)
return dir1, dir2, fpos1, fpos2, fdir1, fdir2, cnt1 or 0, cnt2 or 0
end
end
-- To be called from a repair tool in the case, tube nodes are "unbreakable".
function Tube:tool_remove_tube(pos, sound)
local oldnode, oldmeta = self:remove_tube(pos, sound)
if oldnode then
self:after_dig_tube(pos, oldnode, oldmeta)
return true
end
return false
end
function Tube:prepare_pairing(pos, tube_dir, sFormspec)
local meta = M(pos)
if meta:get_int("tube_dir") ~= 0 then -- already prepared?
-- update tube_dir only
meta:set_int("tube_dir", tube_dir)
else
meta:set_int("tube_dir", tube_dir)
meta:set_string("channel", nil)
meta:set_string("infotext", "Unconnected")
meta:set_string("formspec", sFormspec)
end
end
function Tube:pairing(pos, channel)
if self.pairingList[channel] and pos ~= self.pairingList[channel] then
-- store peer position on both nodes
local peer_pos = self.pairingList[channel]
local tube_dir1 = self:store_teleport_data(pos, peer_pos)
local tube_dir2 = self:store_teleport_data(peer_pos, pos)
local fpos1,fdir1 = self:repair_tube_line(pos, tube_dir1)
local fpos2,fdir2 = self:repair_tube_line(peer_pos, tube_dir2)
self:add_meta(fpos1, fpos2,fdir2)
self:add_meta(fpos2, fpos1,fdir1)
self:update_secondary_node(fpos1,fdir1, fpos2,fdir2)
self:update_secondary_node(fpos2,fdir2, fpos1,fdir1)
self.pairingList[channel] = nil
return true
else
self.pairingList[channel] = pos
local meta = M(pos)
meta:set_string("channel", channel)
meta:set_string("infotext", "Unconnected ("..channel..")")
return false
end
end
function Tube:stop_pairing(pos, oldmetadata, sFormspec)
-- unpair peer node
if oldmetadata and oldmetadata.fields then
if oldmetadata.fields.tele_pos then
local tele_pos = minetest.string_to_pos(oldmetadata.fields.tele_pos)
local peer_meta = M(tele_pos)
if peer_meta then
self:after_place_node(tele_pos, {peer_meta:get_int("tube_dir")})
peer_meta:set_string("channel", nil)
peer_meta:set_string("tele_pos", nil)
peer_meta:set_string("formspec", sFormspec)
peer_meta:set_string("infotext", "Unconnected")
end
elseif oldmetadata.fields.channel then
self.pairingList[oldmetadata.fields.channel] = nil
end
end
end