spawns

Table of Contents

Spawns is a plugin for Bukkit and Minecraft that allows you to fully customize the spawning behaviour of mobs on your server.

Features

tweak the default Minecraft spawns or replace them completely
set mobs to spawn under conditions they never normally would
block certain mobs from ever spawning
cause mobs to spawn with potion effects, equipment, saddles, etc.
cause mobs to spawn in different variants, like powered creeper, wither skeleton, etc.
mobs appear in the world in the same way as they do normally, so are compatible with all other plugins

Dive right in here to see how to make config files or keep reading for an overview of Minecraft spawning.

Default spawning

Minecraft spawning works like this:
Every spawn cycle (1 tick or 1/20 second by default for hostile mobs) the game makes a list of all the chunks around each player, up to a radius of seven chunks. Each chunk will only be counted once, even if that chunk is around several players.

Once this list is complete a mob limit is calculated. The limit is higher the more chunks are in the list. If the limit is lower than the current amount of a mob type in the world then the cycle will be cancelled.

If the limit is not yet reached a random block from each chunk in the list will be calculated and this chunk will be used as the centre point for a pack of mobs to spawn around. In order to continue, this block must be water for water mobs (only squid so far) and air for any other type of mob.

If this block is suitable then a maximum of 12 random blocks are chosen from up to 20 blocks away, but always at the same height as the centre block.

Lastly, The individual blocks are checked that they can physically fit the mob, so they need to be air, have air above and an opaque block below. The type of mob is chosen based upon the matching conditions (biome, height, floor block type, etc.) and the final mob is chosen randomly from all mobs that are eligible to spawn there. All other mobs in the pack will be the same type.

Permissions

spawns.can-reload-config, which allows the user to reload the config. Default is Op.

spawns.can-count-mobs, which allows the user to display a summary of mob amounts in a world. Default is Op.

Commands

/reload-spawns, or /rs, which reloads the config without having to reload the server. Any mobs already in the world will be unaffected by any changes in the config.

/count-mobs, or /cm, which displays a list of mob numbers in the world. Add a world name argument to specify a world (optional if run as a player) and / or a mob type argument to choose one type of mob to count.

Update checking

If you like, you can set the plugin to check for any newer versions that get released. To do this add an element to the config.xml file, like this:

&lt;check-for-newer-version/&gt;

When this element is present the plugin will report if it finds a newer version. This only works for release builds so you won't be bothered by any beta or dev builds. To disable this checking simply remove the element.

Note that no update will be downloaded even with this set.

Examples

I would love to get any example config/packs/mobs files you have created to add to the docs, so if you have one you're proud of send it in and I'll add it.

spawns took a lot of work, so if your server is enriched by it please consider sending some love my way!

If you're penniless or like spawns but not that much I'm also partial to TF2 items. Send any you don't want my way! STEAM id: coldntired

If you don't know what TF2 is, then start playing! It's free and fun!

For other projects, links, help, etc. please visit the main website.

You can also follow sylian.eu on Twitter for updates.

Comments

_ForgeUser8502844
- Join Date: 2/29/2012
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#273 _ForgeUser8502844

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Posted Jan 7, 2014
Ok this is what I get:

[Server thread/WARN]: [spawns] Task #3514 for spawns v1.7.2 b2 generated an exception
java.lang.NullPointerException
   at eu.sylian.conditions.Condition.matches(Condition.java:345) ~[?:?]
   at eu.sylian.conditions.Condition.passes(Condition.java:194) ~[?:?]
   at eu.sylian.conditions.ConditionGroup.passesAllConditions(ConditionGroup.java:56) ~[?:?]
   at eu.sylian.spawns.Mob.canSpawnHere(Mob.java:761) ~[?:?]
   at eu.sylian.spawns.Pack.getMobToSpawn(Pack.java:79) ~[?:?]
   at eu.sylian.spawns.WorldHandler.getSpawnBlocks(WorldHandler.java:312) ~[?:?]
   at eu.sylian.spawns.WorldHandler.run(WorldHandler.java:215) ~[?:?]
   at org.bukkit.craftbukkit.v1_7_R1.scheduler.CraftTask.run(CraftTask.java:53) ~[minecraft_server.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
   at org.bukkit.craftbukkit.v1_7_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:345) [minecraft_server.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
   at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:587) [minecraft_server.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
   at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:250) [minecraft_server.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
   at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:545) [minecraft_server.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
   at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:457) [minecraft_server.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]
   at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [minecraft_server.jar:git-Bukkit-1.7.2-R0.2-b2974jnks]

Sorry I couldn't figure out how to spoiler that info!

Last edited by _ForgeUser8502844: Jan 7, 2014

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coldandtired
- Location: Warsaw
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#272 coldandtired

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Posted Jan 7, 2014
@Schlutteh Can you post the full log with the error so I can see what's causing it?

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Treijim
- Location: Adelaide
- Join Date: 9/18/2013
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#271 Treijim

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Posted Jan 6, 2014
@Schlutteh

Same here. The plugin simply doesn't seem to be working with that version of Bukkit - although it does seem like some things are happening, such as the increased mob limit.

Last edited by Treijim: Jan 6, 2014

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_ForgeUser8502844
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#270 _ForgeUser8502844

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Posted Jan 5, 2014
Edit: Anyone else getting a Null Pointer Exception in Bukkit beta R0.2 (#2974)?
Spawns seems to have stopped working for me, I'm not sure what to do.

Last edited by _ForgeUser8502844: Jan 6, 2014

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_ForgeUser10644726
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#269 _ForgeUser10644726

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Posted Jan 1, 2014
I mean a mob that I have created within the Spawns so if, for example I have a zombie called Lvl1Zombie, i want to be able to limit them to just 6 mobs in the world, would that be possible?

Thanks

Shaythegoon

EDIT: It also appears that the dies.txt is not working (is not being used) by the plugin. I have this in there and it does not work when the mob is killed:

<event> <action> <entry if_name="LVL100SPIDER" action="broadcast" message="The Cave Spider Boss has been slain by a valiant team of players!"/> </action> </event>

EDIT 2: Happy New Year!
Last edited by _ForgeUser10644726: Jan 1, 2014

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coldandtired
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#268 coldandtired

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Posted Dec 31, 2013
@shaythegoon You can limit the mob by type (e.g. have no more than x zombies in the world at once). Do you mean this or an exact individual mob?

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coldandtired
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#267 coldandtired

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Posted Dec 31, 2013
@Schlutteh It looks like that mob is just another hack (like spider jockeys) so there currently isn't any way to target them specifically. I'll add the ability to link the rider and vehicle together though,

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_ForgeUser10644726
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#266 _ForgeUser10644726

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Posted Dec 31, 2013
It also be cool if we could limit the amount of a custom mob spawning with an extra condition in the spawn-if tags...

Thanks

Shaythegoon

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_ForgeUser10644726

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#265 Posted Dec 30, 2013

I'm using MobHealth to show the players the Mobs health, but it comes with an output on the console that I have never seen before... This is what it says:

[Mobs] config = §fLVL 2 ZOMBIE§r§f§r: [§a||||||§c||||||§f], needed = Lvl 2 Zombie

Also; I'm still not able to get zombies to drop Iron Ingots using this in the "Dies.txt" file in mobs:

<event>
	<action>
		<entry if_name="Lvl 1 Zombie" action="1a + 1b + 1c"/>
		<entry if_name="Lvl 2 Zombie" action="2a + 2b + 2c"/>
	</action>

	<linked_action name="1a" action="give" sub="custom_drops" item="265" amount="0 to 1"/>
	<linked_action name="1b" action="give" sub="exp" amount="1 to 3" target="killer"/>
	<linked_action name="1c" action="tell" message="You killed a Lvl 1 Zombie" target="killer"/>

	<linked_action name="2a" action="give" sub="item"  item="265" amount="0 to 2"/>
	<linked_action name="2b" action="give" sub="exp" amount="3 to 5" target="killer"/>
	<linked_action name="2c" action="tell" message="You killed a Lvl 2 Zombie" target="killer"/>
</event>

And this in the "Mobs.xml in spawns:

	<zombie>
		<id>lvl1zombie1</id>
		<name>Lvl 1 Zombie</name>
		<pack-limit>4</pack-limit>
		<hp>5</hp>
		<helmet>leather_helmet</helmet>
		<spawn-if>
			<x>-605 to -582</x>
			<y>above 59</y>
			<z>1334 to 1351</z>
		</spawn-if>
	</zombie>

The zombies spawn and nothing is dropped when they are killed...

UPDATE: After a bit of trial and error, and using the Broadcast as a Debug I got my models to work, if you want to see them and add them as examples, then just ask. I'd happily put some thing useful back into Spawns and Mobs for other people to use :D

Thanks Shaythegoon

Last edited by _ForgeUser10644726: Dec 30, 2013

_ForgeUser8502844
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#264 _ForgeUser8502844

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Posted Dec 28, 2013
Now that zombie lag has been "reduced" (apparently), I'm considering allowing them to spawn again on my server. But I have one concern: chicken-jockeys. http://minecraft.gamepedia.com/Chicken_Jockey

Is there a way for us to allow them to spawn but make the chicken despawn with the baby zombie?

I suppose this issue will have to wait for a Bukkit 1.7.4 release before we can figure out what to do, I just realized it's not a 1.7.2 feature.

Last edited by _ForgeUser8502844: Dec 29, 2013

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coldandtired
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#263 coldandtired

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Posted Dec 26, 2013
1.7.2 b2 is just an update to the 2nd Beta build. I've been working hard on updates but decided to roll them back for now as the beta is out.

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coldandtired
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#262 coldandtired

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Posted Dec 16, 2013
@Mavhill You can use Mobs to do this. I will try to add it to Spawns if it doesn't cause too much of a performance hit.

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coldandtired
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#261 coldandtired

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Posted Dec 16, 2013
@Schlutteh \o/

One fewer thing to worry about :)

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maverickhill
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#260 maverickhill

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Posted Dec 15, 2013
Anyway to add worldguard regions so you could block certain mobs spawning in certain wg regions?

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_ForgeUser8502844
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#259 _ForgeUser8502844

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Posted Dec 12, 2013
@coldandtired

After a couple Bukkit updates, the blocked zombies stopped spawning, so yeah it was just a Bukkit glitch after all. Running great now (Bukkit #2953).

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_ForgeUser11011482
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#258 _ForgeUser11011482

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Posted Dec 10, 2013
@coldandtired

I have seen Zombies, Skeletons and horses spawning half inside blocks.

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coldandtired
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#257 coldandtired

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Posted Dec 10, 2013
I only knew about (cave)spiders spawning inside blocks so that was fixed already. I can easily do the same thing for iron golems.

Blocked or allowed everything is already pretty much ready but needs a bit more polishing.

The zombie thing might be Bukkit-related as I can't remember changing any of that code for a while. There are multiple Bukkit bug fixes every day (some of which break something else) so it will take a while to get stable.

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_ForgeUser8502844
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#256 _ForgeUser8502844

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Posted Dec 10, 2013
I sometimes get mobs (mostly iron golems) spawning halfway inside solid blocks too, but it really doesn't worry me. This plugin allows us to spawn mobs under conditions that would normally be blocked by the vanilla mechanics, so I guess it's just part of that. Meh, not worried.

Now that we have a 1.7 version, are you still planning to add a blocked-biomes condition? So that we can specify which biomes each mob is not allowed to spawn in, now that there are so many different biomes (including variants).

No hurry though, Bukkit is gonna take awhile to get a Beta or RB finished.

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_ForgeUser11011482
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#255 _ForgeUser11011482

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Posted Dec 8, 2013
Any fix in sight for mobs spawning with half their body inside blocks and therefor dying?

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_ForgeUser8502844
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#254 _ForgeUser8502844

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Posted Dec 8, 2013
Thanks for updating so quickly! I have run 1.7.2 for a couple hours, with Spawns, mcMMO, and Lockette; RAM usage is low / CPU usage is low, my custom spawns are working, only minor glitch is that sometimes zombies are spawning even though they are not on my allowed-default-spawns or spawning outside of conditions I have set. Probably a Bukkit problem though.

I read that zombies don't cause as much server lag now, but with their advanced pathfinding and target range, I think I'll still keep them confined. Zombies are meant to be slow and stupid!

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Project ID

60690
Created

Jul 3, 2013
Last Released File

Sep 13, 2020
Total Downloads

24,478

1.16.3 b1
Sep 13, 2020
1.14.4 b1
Oct 2, 2019

Bukkit

spawns

Bukkit Plugins

spawns

Table of Contents

Default spawning

Permissions

Commands

Update checking

Examples

Comments

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