Here, I wrote a version that will save the players position to a file. I also fixed the chat commands a bit. To save a spawn point just got where you ant it and type "/setspawn" that is it. Right now a mod can not set what direction you are looking so you will be looking in whatever direction you were look in in when you died. Also you should set the variable 'default_spawn' to a good value.
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-- needed by 'table_save' and 'table_load'
local function exportstring( s )
s = string.format( "%q",s )
-- to replace
s = string.gsub( s,"\\\n","\\n" )
s = string.gsub( s,"\r","\\r" )
s = string.gsub( s,string.char(26),"\"..string.char(26)..\"" )
return s
end
--// The Save Function
local function table_save( tbl,filename )
local charS,charE = " ","\n"
local file,err
-- create a pseudo file that writes to a string and return the string
if not filename then
file = { write = function( self,newstr ) self.str = self.str..newstr end, str = "" }
charS,charE = "",""
-- write table to tmpfile
elseif filename == true or filename == 1 then
charS,charE,file = "","",io.tmpfile()
-- write table to file
-- use io.open here rather than io.output, since in windows when clicking on a file opened with io.output will create an error
else
file,err = io.open( filename, "w" )
if err then return _,err end
end
-- initiate variables for save procedure
local tables,lookup = { tbl },{ [tbl] = 1 }
file:write( "return {"..charE )
for idx,t in ipairs( tables ) do
if filename and filename ~= true and filename ~= 1 then
file:write( "-- Table: {"..idx.."}"..charE )
end
file:write( "{"..charE )
local thandled = {}
for i,v in ipairs( t ) do
thandled[i] = true
-- escape functions and userdata
if type( v ) ~= "userdata" then
-- only handle value
if type( v ) == "table" then
if not lookup[v] then
table.insert( tables, v )
lookup[v] = #tables
end
file:write( charS.."{"..lookup[v].."},"..charE )
elseif type( v ) == "function" then
file:write( charS.."loadstring("..exportstring(string.dump( v )).."),"..charE )
else
local value = ( type( v ) == "string" and exportstring( v ) ) or tostring( v )
file:write( charS..value..","..charE )
end
end
end
for i,v in pairs( t ) do
-- escape functions and userdata
if (not thandled[i]) and type( v ) ~= "userdata" then
-- handle index
if type( i ) == "table" then
if not lookup[i] then
table.insert( tables,i )
lookup[i] = #tables
end
file:write( charS.."[{"..lookup[i].."}]=" )
else
local index = ( type( i ) == "string" and "["..exportstring( i ).."]" ) or string.format( "[%d]",i )
file:write( charS..index.."=" )
end
-- handle value
if type( v ) == "table" then
if not lookup[v] then
table.insert( tables,v )
lookup[v] = #tables
end
file:write( "{"..lookup[v].."},"..charE )
elseif type( v ) == "function" then
file:write( "loadstring("..exportstring(string.dump( v )).."),"..charE )
else
local value = ( type( v ) == "string" and exportstring( v ) ) or tostring( v )
file:write( value..","..charE )
end
end
end
file:write( "},"..charE )
end
file:write( "}" )
-- Return Values
-- return stringtable from string
if not filename then
-- set marker for stringtable
return file.str.."--|"
-- return stringttable from file
elseif filename == true or filename == 1 then
file:seek ( "set" )
-- no need to close file, it gets closed and removed automatically
-- set marker for stringtable
return file:read( "*a" ).."--|"
-- close file and return 1
else
file:close()
return 1
end
end
--// The Load Function
local function table_load( sfile )
-- catch marker for stringtable
if string.sub( sfile,-3,-1 ) == "--|" then
tables,err = loadstring( sfile )
else
tables,err = loadfile( sfile )
end
if err then return _,err
end
tables = tables()
for idx = 1,#tables do
local tolinkv,tolinki = {},{}
for i,v in pairs( tables[idx] ) do
if type( v ) == "table" and tables[v[1]] then
table.insert( tolinkv,{ i,tables[v[1]] } )
end
if type( i ) == "table" and tables[i[1]] then
table.insert( tolinki,{ i,tables[i[1]] } )
end
end
-- link values, first due to possible changes of indices
for _,v in ipairs( tolinkv ) do
tables[idx][v[1]] = v[2]
end
-- link indices
for _,v in ipairs( tolinki ) do
tables[idx][v[2]],tables[idx][v[1]] = tables[idx][v[1]],nil
end
end
return tables[1]
end
local spawn_locations_db_filename = minetest.get_worldpath() .. "/spawn_locations.tbl"
spawn_locations = table_load(spawn_locations_db_filename)
if type(spawn_locations) ~= "table" then
spawn_locations = {}
end
default_spawn = {x = 0, y = 0, z = 0}
minetest.register_on_chat_message(function(name, message)
cmd = "/setspawn"
if message:sub(0, #cmd) == cmd then
player = minetest.env:get_player_by_name(name)
spawn_locations[name] = player:getpos()
table_save( spawn_locations, spawn_locations_db_filename )
return true
end
cmd = "/afk"
if message:sub(0, #cmd) == cmd then
minetest.chat_send_all(name, " is AFK!")
return true
end
cmd = "/not_afk"
if message:sub(0, #cmd) == cmd then
minetest.chat_send_all(name, " is back from AFK!")
return true
end
end)
--Deds to Kahrl
minetest.register_on_newplayer(function(player)
player:setpos(default_spawn)
return true
end)
--Deds to Kahrl
minetest.register_on_respawnplayer(function(player, pos)
name = player:get_player_name()
if spawn_locations[name] ~= nil then
player:setpos(spawn_locations[name])
else
player:setpos(default_spawn)
end
return true
end)