Time  Nick            Message
10:49 deltasquared    could anyone point me to whereabouts in the MT source code fall damage is calculated? (client side, apparently...)
10:52 deltasquared    specifically I'm trying to see if there's one place where damage is calculated from impact velocity
11:00 deltasquared    ... think I've found it. ClientEnvironment::step() seems to make use of the collision information built up by LocalPlayer::move().
11:12 Krock           client/clientenvironment.cpp:
11:13 Krock           ^ deltasquared
11:13 deltasquared    Krock: yeah I had spotted it.
11:24 MinetestBot     02[git] 04SmallJoker -> 03minetest/minetest: Docs: Clarify where to check for 'protection_bypass' (#8675) 134749238 https://git.io/fjXBc (152019-07-14T11:23:38Z)
13:41 lllI1I          how does the anti-cheat work in minetest, the only thing in lua_api is one function and the types of cheats that are detected
13:42 lllI1I          do mods need to set up functions to hook into these, or are there default behaviors
13:44 DS-minetest     afaik, anticheat is done in the core
13:44 * DS-minetest   does not like anticheat
13:53 lllI1I          since everything is done by the client there'd better be anticheat
13:53 lllI1I          otherwise cheats are trivial
13:54 lllI1I          unless you meant "does not like the anticheat as it is currently implemented"
13:56 Calinou         a lot of servers disable the anticheat (or parts of it) as some categories often gives false positives
13:56 Calinou         (such as "moved too fast")
14:00 lllI1I          can the default behavior be overridden, so for example it just pings any online admins to come look at suspected tomfoolery
14:01 Calinou         IIRC, you can register Lua hooks to run when specific anticheats are triggered
14:01 DS-minetest     anticheat causes much lag and doesn't make more fun
14:01 Calinou         so yeah, that could be done
14:02 Calinou         not sure if you can disable the default behavior while keeping the Lua hooks though
14:02 Calinou         still, with the "moved too fast" check, you'd get dozens (if not hundreds) of pings per hour on a large server :)
14:02 DS-minetest     cheats are trivial anyway
14:02 lllI1I          it would probably depend on the server, a competitive pvp server probably would prefer people playing fair
14:03 DS-minetest     for most cheats it's hard to make a proper anticheat
14:03 DS-minetest     (eg. noclip or flying)
14:03 lllI1I          maybe only record the "moving too fast" events and ping if it looks to be a consistent problem
14:04 sfan5           that's what the code does, roughly
14:05 lllI1I          maybe I should actually look at the code to see what it does first huhu
14:05 sfan5           it has a lag pool and won't prevent actions if it looks plausible given the latency/lag of the client
14:05 * DS-minetest   is happy as long as cheating is only possible by changing the core and the other players' experience isn't altered (eg. by breaking protection, moving items unallowed etc.)
14:08 lllI1I          dunno how plausible the idea of registering other cheattypes would be
14:08 lllI1I          some games/servers might put limits on build speed, for e.g.
17:11 Copenhagen_Bram Is there anything like this for minetest? https://education.minecraft.net/challenges/a-visit-to-the-international-space-station%E2%80%8B/
17:16 DS-minetest     there was something much better: https://www.youtube.com/watch?v=sWbzGpRVbaU&t=270
17:16 DS-minetest     !title
17:16 MinetestBot     DS-minetest: Minetest. Swimming pool, House and Space Station. - YouTube
17:17 DS-minetest     and you can convert minecraft to minetest maps, i think
17:26 Copenhagen_Bram How do I convert minecraft maps to minetest?
17:29 DS-minetest     uh, idk
17:29 DS-minetest     look into the forums and search in the web
17:31 Nezrok          Try mcimport
17:31 Copenhagen_Bram i will
17:33 Copenhagen_Bram it doesn't seem to be working on the .mctemplate
17:37 Copenhagen_Bram oh wait it's a zip file
17:37 Nezrok          Aren't MC maps saved as .dat files?
17:39 Copenhagen_Bram FileNotFoundError: [Errno 2] No such file or directory: '/home/[scrubbed]/ISS_Minecraft_Challenge_v2/region'
17:42 Copenhagen_Bram oh wait something's in my ~/.minetest/worlds/
17:49 Copenhagen_Bram there's nothing here
17:50 Copenhagen_Bram a shell script for downloading mods, a worldmods/ folder, and 2 lines of text in world.mt
17:53 Copenhagen_Bram welcome back Pie-jacker875
19:26 Nezrok          If I make a mod that builds on and changes the functionality of one of the built in game commands, I'd release it under lgpl 2.1, right?
19:43 Krock           yes
19:44 Krock           although there are also CC0/WTFPL/Unlicense mods around that use and overwrite the Minetest API. nobody cares anyway
19:54 Nezrok          Thanks, Krock
19:56 Krock           !next
19:56 MinetestBot     Another satisfied customer. Next!
19:56 DS-minetest     how can I check if a not yet existing path is a subpath of another path
19:57 DS-minetest     ?
20:04 Krock           split(0, last_index_of('/'))
20:06 DS-minetest     (in c++ and the not yet existing path is not absolute)
20:06 Krock           make it absolute
20:06 DS-minetest     how?
20:06 DS-minetest     fs::AbsolutePath doesn't work
20:07 Krock           https://stackoverflow.com/questions/2341808/
20:07 Krock           oh. that's what AbsolutePath uses
20:07 DS-minetest     yes
20:08 Krock           straight forward workaround would be to make the path valid by creating it
20:09 Krock           or do string operations to convert it manually to an absolute path
20:09 DS-minetest     yes, but I don't want that a server can make the client create some weird paths somewhere
20:09 sfan5           what are you implementing?
20:09 Krock           mhm... well so, going off now. good luck
20:10 DS-minetest     sfan5:  https://github.com/DS-Minetest/minetest/tree/sscsm_1
20:11 sfan5           csm already uses an in-ram filesystem with | as path separator
20:11 sfan5           if the server wants to send mods, they should be directly put in there but not saved to disk
20:12 DS-minetest     can lua then still load from there?
20:13 sfan5           sure
20:14 sfan5           in fact, the code for that is already present
20:14 DS-minetest     oh
20:16 DS-minetest     is it FileCache?
20:19 sfan5           https://github.com/minetest/minetest/blob/ad8d68c06aa67ba6d9249f583b9cbb9a60fe1e02/src/client/client.cpp#L199
20:19 sfan5           : actually, not |
20:22 DS-minetest     thanks
20:27 DS-minetest     but, as far as I can see, this is just saving the paths, so that paths like "default:foo/bar.lua" are possible
20:27 DS-minetest     it's not saving the file data
20:28 Corey[m]        If you're working with relative paths that you don't trust, a trick I've used that works most times is to make it absolute against root (.i.e "/"), and then join it with the 'sandboxed' path, Path.join('/my/sandbox/path/', Path.expand(untrusted_path, "/")), the expand resolves any backwards refs, which prevents it from escaping the sandbox
20:28 Corey[m]        Also hi
20:29 DS-minetest     hi, too
20:29 DS-minetest     but the problem is that I can't get the absolute path because it doesn't exist yet
20:30 Corey[m]        My example doesn't require that the path exists, it should only be manipulating path names like boring strings
20:30 sfan5           DS-minetest: hm, you're right
20:30 sfan5           I guess it could be extended to do what I described
20:32 DS-minetest     hm, I think, it might be possible to just disallow any ".."s
20:32 DS-minetest     in the relative path
20:32 DS-minetest     in the sandboxed path'
20:32 DS-minetest     **
20:33 Corey[m]        bleh, higher level languages have spoiled me rotten, I forgot how hard it is to sanitize file paths in C land
22:51 Nezrok          Is there a way to make particles spawned with minetest.add_particlespawner glow?
23:00 Nezrok          Oh I see, they can light themselves up, but not the surrounding area
23:00 Nezrok          Oh well