filename=minetest.get_worldpath() .. "/teleport_tubes" function read_file() local f = io.open(filename, "r") if f==nil then return {} end local t = f:read("*all") f:close() if t=="" or t==nil then return {} end return minetest.deserialize(t) end function write_file(tbl) local f = io.open(filename, "w") f:write(minetest.serialize(tbl)) f:close() end function add_tube_in_file(pos,channel, cr) tbl=read_file() for _,val in ipairs(tbl) do if val.x==pos.x and val.y==pos.y and val.z==pos.z then return end end table.insert(tbl,{x=pos.x,y=pos.y,z=pos.z,channel=channel,cr=cr}) write_file(tbl) end function remove_tube_in_file(pos) tbl=read_file() newtbl={} for _,val in ipairs(tbl) do if val.x~=pos.x or val.y~=pos.y or val.z~=pos.z then table.insert(newtbl,val) end end write_file(newtbl) end function get_tubes_in_file(pos,channel) tbl=read_file() newtbl={} changed=false for _,val in ipairs(tbl) do local node = minetest.get_node(val) local meta = minetest.get_meta(val) if node.name~="ignore" and (val.channel~=meta:get_string("channel") or val.cr~=meta:get_int("can_receive")) then val.channel=meta:get_string("channel") val.cr=meta:get_int("can_receive") changed=true end if val.cr==1 and val.channel==channel and (val.x~=pos.x or val.y~=pos.y or val.z~=pos.z) then table.insert(newtbl,val) end end if changed then write_file(tbl) end return newtbl end teleport_noctr_textures={"pipeworks_teleport_tube_noctr.png","pipeworks_teleport_tube_noctr.png","pipeworks_teleport_tube_noctr.png", "pipeworks_teleport_tube_noctr.png","pipeworks_teleport_tube_noctr.png","pipeworks_teleport_tube_noctr.png"} teleport_plain_textures={"pipeworks_teleport_tube_plain.png","pipeworks_teleport_tube_plain.png","pipeworks_teleport_tube_plain.png", "pipeworks_teleport_tube_plain.png","pipeworks_teleport_tube_plain.png","pipeworks_teleport_tube_plain.png"} teleport_end_textures={"pipeworks_teleport_tube_end.png","pipeworks_teleport_tube_end.png","pipeworks_teleport_tube_end.png", "pipeworks_teleport_tube_end.png","pipeworks_teleport_tube_end.png","pipeworks_teleport_tube_end.png"} teleport_short_texture="pipeworks_teleport_tube_short.png" teleport_inv_texture="pipeworks_teleport_tube_inv.png" register_tube("pipeworks:teleport_tube","Teleporter pneumatic tube segment",teleport_plain_textures, teleport_noctr_textures,teleport_end_textures,teleport_short_texture,teleport_inv_texture, {tube={can_go=function(pos,node,velocity,stack) velocity.x=0 velocity.y=0 velocity.z=0 local meta = minetest.get_meta(pos) channel=meta:get_string("channel") local target=get_tubes_in_file(pos,channel) if target[1]==nil then return {} end d=math.random(1,#target) pos.x=target[d].x pos.y=target[d].y pos.z=target[d].z return meseadjlist end}, on_construct = function(pos) local meta = minetest.get_meta(pos) meta:set_string("channel","") meta:set_int("can_receive",1) meta:set_string("formspec","size[9,1;]".. "field[0,0.5;7,1;channel;Channel:;${channel}]".. "button[8,0;1,1;bt;On]") add_tube_in_file(pos,"") end, on_receive_fields = function(pos,formname,fields,sender) local meta = minetest.get_meta(pos) --check for private channels if fields.channel ~= nil then local name, mode = fields.channel:match("^([^:;]+)([:;])") if name and mode and name ~= sender:get_player_name() then --channels starting with '[name]:' can only be used by the named player if mode == ":" then minetest.chat_send_player(sender:get_player_name(), "Sorry, channel '"..fields.channel.."' is reserved for exclusive use by "..name) return --channels starting with '[name];' can be used by other players, but cannot be received from elseif mode == ";" and (meta:get_int("can_receive") ~= 0) == (fields["bt"] == nil) then minetest.chat_send_player(sender:get_player_name(), "Sorry, receiving from channel '"..fields.channel.."' is reserved for "..name) return end end end if fields.channel==nil then fields.channel=meta:get_string("channel") end meta:set_string("channel",fields.channel) remove_tube_in_file(pos) local cr = meta:get_int("can_receive") if fields["bt"] then cr=1-cr meta:set_int("can_receive",cr) if cr==1 then meta:set_string("formspec","size[9,1;]".. "field[0,0.5;7,1;channel;Channel:;${channel}]".. "button[8,0;1,1;bt;On]") else meta:set_string("formspec","size[9,1;]".. "field[0,0.5;7,1;channel;Channel:;${channel}]".. "button[8,0;1,1;bt;Off]") end end add_tube_in_file(pos,fields.channel, cr) end, on_destruct = function(pos) remove_tube_in_file(pos) end})