Enhanced Building Guide Cannot Build

[tprussak]

Despite what the guide says, clicking on the enhanced building guide with blocks will not build them in the shape the guide is set to.

[boq]

Well, this was recorded in current version: https://www.youtube.com/watch?v=zUf_p8zvovM

Things to check:

• you have permission to place blocks in that chunk
• there are no weird plugins that block placing blocks more than few blocks from you
• your shape isn't to small - blocks adjacent to guide are not filled

[MJRLegends]

im also getting the same issue with my mod pack but only seems to be on servers. But im not sure if its plugins stopping it or only on my server and i havent tested in other servers yet, but it does work in single player . here is the issue thing for it https://github.com/MJRLegends/Space-Astronomy-Feedback-/issues/250.

Im going to do more testing to see if its a plugin stopping it working

[secondfry]

Software	Version
Thermos	1.7.10-1614.57
FTB Infnity Evolved	2.5.0
OpenBlocks	1.5.1
FTBUtilities	1.7.10-1.0.17.6

WorldGuard is installed, but claims are configured via FTBUtilities.
Server console output empty. Client console output empty. It just does not put blocks. Even in singleplayer without any Bukkit/Spigot/Thermos shenanigans.
It works in creative tho.

[boq]

I have no luck in reproducing it, so I guess it's time for "stupid" questions:

• maybe it's just basic building guide (one without spinning particles inside)? (just basic sanity check)
• what's the shape and dimensions?
• does it work outside spawn server spawn area?

[secondfry]

• It's not. Sanity still in place.
• Tested sphere 12^3 and dome 16^3 and sphere 48^3.
• It does not (on bukkit/spigot/etc.).

Tho I just re-tested that in single player and it did work for sure. Updated previous comment.
Tested in pure Forge server environment. It works.

So culprit here is somewhere in Bukkit/Spigot/Thermos code. I guess, there would be no support for this cause?

[boq]

Well, I suspected some kind of grief protection that prevents player from placing block more than X blocks away from current position (I'm using actual player to place blocks, in hope that it will generate less glitches).

I guess I could add option to use fake player instead, but I'm not sure what problems it may generate.

[Eufranio]

I have the same issue. Why not implement the fake player?

[boq]

First of all, it's better to use actual player - fake players are always risky.

Secondary issue is that this problem manifests only on non-Forge servers. We don't usually support that (expect for crash prevention), since it's hard to test in all configurations.

Also, this is all just a hypothesis - I haven't confirmed, what actually happens.

[Eufranio]

Well, this block became useless in non-forge servers, I thought you were developing a fix or so, but ok, thanks by your nice work anyway.

[boq]

I don't have fix, since I don't exactly know what's wrong - would be nice to have some kind of log.

[Eufranio]

Well, there is no errors/logs of when exactly it happens. Seems that it doesn't work due to the way that Bukkit prevents against cheatings. Why does fake players are risky? Just check if who is clicking has the permission, if it has, the fake player do its work :|

[MJRLegends]

@boq yeah there is no error in logs, switching to a fake player would be the only option...

[secondfry]

Minecraft has block placement range and IIRC (it's been 4 months already, can't find the link now) Bukkit just enforces it.

[boq]

Fake players are... well, fake. So they are missing some stuff (network handler, client presence), which may lead to invalid behaviour with some of the more advanced/magic blocks. But that probably applies only to few percent of blocks.

Anyway, if I switch to fake player, all blocks would be placed by fake player (one of 10 in openmods pool, depends on config). I'm not sure what the usual config is, but I can imagine that leaving block placing permissions on fake players would be gift for griefers (What if I use one to fill whole protected area with obsidian? Checking "click" permission on guide itself does not prevent this, since placer on the outside of protection area could sill place block on the inside).

Now, what if I check permissions using actual player, then place block with fake one? Pointless, since block will be still placed with potentially blocked fake player.

Also, what if "far click" protection, that currently blocks guide placing, is implemented via permission that can be checked from Forge API? Then no matter what I will check, it will always be blocked.

RE: MC built-in protection - couldn't find it in vanilla Forge, it's either bugged in vanilla or disabled by Forge patches.

[MJRLegends]

@boq Honestly the griefing issue is down to the server owner as its only a non forge issue so they would be using a plugin like https://github.com/KaiKikuchi/GriefPreventionPlus , a suggestion might be to make a config option to make it a fake player and make it false by default or make some kinda of detecting system to if bukkit/spigot are running....