Inactive [ADMN/MISC] WorldGenerationControl v2.6 - Generate areas of your world at will [1.0.1-R1 / 1.1Dev]

Discussion in 'Inactive/Unsupported Plugins' started by Nephyrin, Aug 7, 2011.

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    WorldGenerationControl 2.6
    Formerly ForceGenChunks
    Which is a confusing ass name so I changed it

    WorldGenerationControl on BukkitDev

    This is a very simple plugin to allow you to pre-generate a region of your world. It does not affect already generated regions. As of 2.0, it can also repair lighting of existing regions.

    • Generate arbitrary regions by coordinates
    • Queue multiple generations
    • Various speed settings to control lag vs generation time
    • Works on a live server
    • Doesn't lock up the server (unless you use the /allAtOnce option)
    • Low ram usage, works on servers with 1gig of memory.
    • Generates trees & ore, not just land
    • Can generate valid lighting
    • Can force regenerate lighting on existing chunks, to fix light issues.
    • Generating land and light take lots of CPU - nothing the plugin can do to prevent that! If you don't want to lag a live server, use the /slow or /veryslow modes.
    • Designed for servers with at least 1gig of memory allocated to them (-Xmx1024M). Servers with lower memory limits may encounter heap exceptions. If you have less than 1gig of memory, try using /slow or /veryslow modes.

    The /genregion (or /generateregion) command can be entered by any server op, the server console, or anyone with the appropriate permission (see below).

    The syntax is:
    /genregion WorldName StartX StartZ EndX EndZ

    For circles (/generatecircularregion or /gencircle):

    /gencircle Radius [WorldName xCenter zCenter]

    The world and center coordinates for the circle command are [optional] if you are a player (not the console). It will default to your current/world position.

    All coordinates are in normal, in-game coordinates - but will be adjusted to the nearest chunk boundary (inclusive).


    All commands can have options applied to them like so:

    /gencircle 1600 MyWorld 0 0 /fast /lighting

    Options are not case sensitive. The available options are:
    • /allAtOnce - Don't pause between steps, generate everything requested all at once. This will make the server basically unusable until the generation completes, but get the job done fastest. Very useful in conjunction with /onlyWhenEmpty
    • /veryFast, /fast, /slow, /verySlow - Adjust speed. Has no effect if /allAtOnce specified. Normally the plugin will cause mild lag while generating usually doing around 700ms of work per three seconds (depending on the server CPU). Raising the speed with fast or veryfast will cause more lag but speed up the generation, slow or veryslow will reduce lag while increasing generation times. Veryfast will cause a lot of lag. Veryslow will cause almost no lag, but will take something like 10x longer.
    • /forceKeepUp - Force the server to 'keep up' with garbage collection and chunk saving. In particular, 1.9 Has a new async chunk saver, which appears to be rate limited, meaning it may not keep up with fast generations. This option forces the chunks to be saved immediately, rather than on a separate thread.
      You should use this option if you notice the plugin spending a lot of time "waiting for the server to catch up" and don't mind the minor increase in CPU usage caused by forcing it to keep up. /allAtOnce mode will always use this option.
    • /lighting:none - Skip generating light data for loaded chunks. See Notes on Lighting below.
    • /lighting:force - Reset and regenerate lighting for all chunks we pass over, even if they already have lighting data. Useful for fixing areas with corrupt lighting.
    • /verbose - Print detailed timing info while generating. Doubles the amount of spam the plugin prints!
    • /quitAfter - Shutdown the server once this (and any other pending generations) are complete. See the Using in a Script section below.
    • /onlyWhenEmpty - Only do generating when the server is empty. The plugin will pause generation and wait until players leave, allowing you to generate lots of land without worrying at all about the extra CPU. You can use this in conjunction with /allAtOnce to have the server use 100% when it is empty towards generating land, without causing any lag when players are online.
    • /destroyAndRegenerateArea - As the name says, this will delete and destroy all land in the area given, generating new land instead. I cannot stress enough how this will delete your world (or the specified area of it at least), so please understand what you're doing and make backups!

    Permissions are optional. Server ops and the server console can always use generation commands. However, if you have permissions installed, the following permissions are used:
    • worldgenerationcontrol.generate - Allows user to queue generations. Implicitly grants worldgenerationcontrol.statusupdates.
    • worldgenerationcontrol.statusupdates - Allows user to see generation progress messages. These can be quite spammy, explicitly removing this permission will cause only the server console to see these messages.

    /genregion OurBeautifulWorld -50 -50 50 50

    Would generate from -50,-50 to 50,50 in game coordinates. Simple!

    /genregion "Bob and Sam's \"Awesome\" World" -50 -50 50 50

    The same command for world: Bob and Sam's "Awesome" World. Quotes can be placed around world names with spaces, world names with actual quotes in them can be escaped with backlashes.

    /gencircle 1000 /fast /verbose /lighting

    Would generate a 1000 block radius circle around the issuing player, using the /fast speed setting, with verbose output, with lighting!

    /gencircle 1000 MyWorld 100 100 /veryslow

    Would generate a 1000 block radius centered in MyWorld at 100x, 100z, using the veryslow speed setting so as not to cause lag.

    /gencircle 10000 MyWorld 100 100 /allAtOnce /onlyWhenEmpty

    Would generate a HEUG circle centered at MyWorld 100,100 at max possible speed, but pause the generation when players join. Useful if you want your server to use 100% on generating when it would otherwise be idle.

    Notes on Lighting

    By default, minecraft only generates lighting info for a chunk when it is first approached by a player. This is fine, but if you want to generate an external map with something like Minecraft Overviewer, it means the areas players haven't visited will only have 'fast' lighting, with pitch black shadows.
    To fix this, by default, WorldGenerationControl forces new chunks to have lighting info, as if a player were nearby. This shouldn't cause any problems, but takes about 8% more CPU-time. You can skip this step with /lighting:none -- the chunks will still be lit when a player wanders by, so this is only an issue for external tools as mentioned above.
    There is also /lighting:force, which will force-generate lighting for all chunks it passes over (even those already generated and with proper lighting), which is useful for making minecraft recalculate the lighting in areas with glitched shadows.

    Using in a Script

    The /quitAfter option lets this plugin be used as part of a script. For example, some users like to generate maps for a lot of random seeds to share with the community or post on /r/minecraft for delicious karma. Because bukkit/java freaks out when EOF is encountered in input, the proper way to do this would be something like:

    echo "gencircle 1000 TestWorld 0 0 /allatonce /quitafter" | cat - /dev/full | java -jar craftbukkit-0.0.1-SNAPSHOT.jar --nojline



    • 2.6
      • Updated to work with 1.0.1 / 1.1 builds.
    • 2.5
      • /forceKeepUp now keeps up on garbage collection as well
      • Renamed /forceSave to /forceKeepUp to reflect that it also keeps up on garbage collection.
      • When the server is floating at >80% memory for too long, the plugin will try invoking a GC. This fixes the issue where the default Java GC options would have it float at 80% memory forever as long as nothing forced it to catch up.
      • Cleaned up /verbose output a little.
      • Check if we have <200Megs free in addition to <20% free, prevents out of memory errors on 512Meg ram servers (which this plugin doesn't technically support)
    • 2.4
      • Add /forceSave workaround for 1.9's AsyncChunkLoader silliness.
      • /allAtOnce now implies /forceSave
      • Make the memory limit a little more conservative to ensure we don't hit GC overhead errors on low memory servers
      • Once the memory limit has been hit, wait for ram to decrease below the limit by at least 10% before resuming
      • Tweak the NextTickList bug workaround - instead of flushing the list, just ensure it stays below a threshold. Should fix the minor lag spikes from the fix.
      • Minor optimizations
    • 2.3 - Death to Memory Issues edition
      • Includes a fix for CraftBukkit's poor NextTickList handling, allowing high generation speeds on low memory servers
      • Invokes the GC directly when running close to memory limits to prevent GC Overhead errors
      • Takes a break if memory usage gets unacceptably high to let the server catch up
    • 2.2
      • Lighting now talks directly to CraftBukkit and is now approximately 115 times faster. Yep.
      • Because lighting has gone from taking up 92% of processing time to a trivial amount, the plugin no longer splits lighting/generating/saving into separate steps.
      • Because lighting is now very fast, /lighting is now the default. It can still be disabled with /lighting:none
      • /lighting:extreme is now named /lighting:force, and only eats a little bit more CPU.
      • Added /destroyAndRegenerateArea - which regenerates all chunks in the region. Beware!
      • Removed /lightExisting, lighting is now only done as-needed either way, and /lighting:force can be used to try and fix corrupt light areas.
      • Fixed /gencircle being centered incorrectly when called by a player without coordinates
      • Improved accuracy of some fuzzy math logic to ensure only requested areas are generated
      • Added /onlyWhenEmpty - this causes the plugin to only do its work when the server is empty, pausing and resuming as needed when players join/leave.
      • Minor speed/overhead improvements
    • 2.1
      • Fixed issue with /allAtOnce being too aggressive on lighting, causing memory issues on low-memory servers.
      • allAtOnce mode now returns into the server briefly between ticks, allowing other commands (such as /cancelgen) to be run.
    • 2.0
      • Name changed to WorldGenerationControl from ForceGenChunks
      • Large rewrite
      • Supports Minecraft 1.8's lighting methods
      • Added options: lighting, speed, verbose, quitafter
      • Added permissions support
      • Normal speed is much, much less laggy. Speed options provide control over lag during generation.
      • No longer trusts server to cleanup chunks, manages process through lighting step and cleans up chunks directly. maxLoadedChunks removed as a result, even on high speed settings the plugin will never load more than 1024 chunks into memory.
      • Cleaned up and improved status messages.
      • Use block coordinates instead of chunk coordinates
      • Support queueing multiple generations
      • Better in-plugin API for other plugins to interact with this one.
      • Other things I likely forgot
    • 1.4
      • Added progress % to generating status messages.
    • 1.3
      • Added support for quotes and spaces in worldnames via quotes and escape sequences.
        • To generate for map: Bob's "Wonderful" Funland
        • /forcegen "Bob's \"Wonderful\" Funland" -10 -10 10 10
      • Fixed the "Invalid world name" error message giving the wrong world name for /forcegencircle commands.
      • Separated generation and cleanup phases - plugin now prints a message when generation is complete, and a second message later when cleanup is complete.
      • New generations can be started even if cleanup isn't done, the remaining cleanup will just be merged with the new task's cleanup.
      • Removed warnings about players being in the world, with above changes there is no harm in them being there.
      • Added some colors to plugin messages. Pretty.
      • Plugin messages now show who did what.
      • Tested with recommended builds 1000 and 1060.
    • 1.2
      • Added /forcegencircle
      • Players who use the command now see the progress, not just the 'generation started' message.
      • A few minor text tweaks.
    • 1.1
      • Wait for chunks to unload, instead of assuming our unload requests succeed. Fixes a 'leak' of loaded chunks in large generations, chunks that never unload until a reboot.
      • Add a optional maxLoadedChunks argument to /forcegen, setting this higher reduces the time spent waiting for old chunks to unload, but causes more chunks to reside in ram, increasing memory usage.
      • Added /cancelforcegen, to cancel generation in progress.
    • 1.0
      • Release
    mknight14 and MechanID like this.
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    I tried /gencircle 1000, /genregion -2000 -2000 2000 2000

    It queue but never started.

    I'm using 1.1-R4 Bukkit.

    2012-02-14 07:37:01 [INFO] [WorldGenerationControl] Loading WorldGenerationControl v2.6.
    2012-02-14 07:37:01 [INFO] [WorldGenCtrl] v2.6 Loaded
    2012-02-14 07:37:14 [INFO] [WorldGenCtrl] Player reemi queued generation of 1482 chunk region (23712 blocks).

    And it's over... The map size in FTP is always the same.

    EDIT: I restarted the server with 1.1-R3 and it work fine ;) So when I'm done I'll just reload R4;)

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    My apologies, i've been rather busy and haven't been keeping up on MC stuff.

    For those getting grid errors:
    Are you sure you're using WGC v2.6? v2.5 had a potentially bad chunk handling bug in new MC versions.
    These errors are appearing on already-generated land? Does using /lightning:none fix this issue?

    I'll take a look again this weekend. My closest guess is that some obfuscation change is causing the lighting-fix method to accidentally call something bad on Chunks on some builds, but v2.6 should be double-checking the obf function it's calling more carefully.
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    Is this updated yet for Anvil/1.2.5?

    Specifically, I want to run this to fix lighting, and only that. I don't need more generation, I just need a global relight.
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    Keybounce - I haven't had time to update it to 1.2, there are a few bugs, the worst of which being /destroyAndRegenerateArea doesn't work well.

    A global relight (/lighting:force) should still work fine, but it's still a good idea to backup your world, as always.
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    Alright, what is the syntax to just force a global relight, no new generation? From reading the OP, it looks like lighting control is a function of generating new land, not "pass over existing land and force a relight".

    Something about seeing light glowing from underwater, only to find as I'm walking around the underwater sandbar that the game is slowly correcting the lighting. Or, walking into a new region, finding dark shadow on the dirt on the ground, suddenly turning into mere shade and seeing grass grow into dirt right in front of me.
  7. Two things, 1) great plugin, I kept my server on 1.1 because from 1.2 terrain generation changed and I had a lot of places that were not generated yet and I did not wanted to have my map like bunch of patches, so over last few days (almost 2 weeks) I was manually generating them (flying zigzaggy over whole map) and still had barely good results
    What a fortunate coincidence this mod was exactly for that version. Hope to see 1.2 soon, in case I update and need it again...

    2) permissions, I believe /destroyAndRegenerateArea should have its own permission, since it has destructive nature as well, while others just add new chunks. You can always delete new chunks, or just use them, but other players content cannot be destroyed by creating new chunks. It can however be destroyed by /destroyAndRegenerateArea, thus its power should be trusted only to very few people.
    Another possible permissions could be limitations. Like allow only some speeds, only some maximum size of radius.

    /brohoof Nephyrin, keep up the good work
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    OMG is either my pc or lame, it took about 10 hours really oO
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    I don't suppose there's a way that we can generate specific Biomes using this?
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    Is there any thing similar to this plugin? I loved being able to generate 10000 chunk radius, and making a map of it before I really dive into new maps, but it doesn't work anymore with the new update.
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    Hey everyone, I've managed to mangle together a (mostly) functioning version of this plugin for 1.4.7 (and probably future versions, as long as the Bukkit API doesn't change), and I've forked it on GitHub. I had to sacrifice lighting support and the ability to force the server to keep up, but everything else I've tested seems to work fine. I plan to get it back up to its former functionality, plus add a few features I've always wanted, like modifying the speed of running tasks, setting up fallback speeds for when players join the server rather than just stopping, and a queue viewer.

    You can take a look at the code on GitHub:
    Or you can just download the plugin from my Dropbox (GitHub disabled their Downloads system sometime after Nephyrin stopped updating, so I had to go with this. If you'd like to mirror it somewhere, feel free!)

    Also, I think I should mention right away that I don't intend to fully continue developing and supporting this plugin in the same capacity as Nephyrin did. I don't have the time, or the knowledge of the code that would require. If you want to request a feature here or on the GitHub issue tracker, I'll certainly consider it, but at least for the time being, my primary goal is to get the plugin working again like it used to.

    Finally, I did all this while fairly tired, and while Dynmap appears to be happily rendering acres of new forest as I speak, there's always the possibility of something going wrong. Make backups! If you're willing to risk running plugins this potentially buggy, you really ought to make backups a regular part of your routine before you- or worse, your players- get bitten in the ass by someone else's oversight.

    Let me know if you guys run into any problems.

    EDIT: Updated to 2.6b, fixing an issue with a missing field in plugin.yml that prevented some servers from loading the plugin (but none of mine, for some reason). If you couldn't get 2.6a working, the 'download the plugin' link above points to the new version, or you can get it from GitHub. I guess I'll update this post whenever I release a new version.

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