Using custom ChunkGenerators

Hey, I followed the tutorial in the Resources section about ChunkGenerators, and came up with this code.

Code:java

public byte[][] generateBlockSections(World world, Random random, int chunkX, int chunkZ, BiomeGrid biomeGrid) {
    byte result[][] = new byte[world.getMaxHeight() / 16][];
 
    for (int x = 0; x < 60; x++) {
        for (int y = 1; y < 10; y++) {
            for (int z = 0; z < 60; z++) {
                setBlock(result, x, y, z, (byte) Material.DIRT.getId());
                setBlock(result, x, 11, z, (byte) Material.GRASS.getId());
            }
        }
    }
 
    return result;
}
 
void setBlock(byte[][] result, int x, int y, int z, byte blkid) {
    if (result[y >> 4] == null) {
        result[y >> 4] = new byte[4096];
    }
 
    result[y >> 4][((y & 0xF) << 8) | (z << 4) | x] = blkid;
}

Now how would I create a world using this ChunkGenerator? I basically just want to create a world with a dirt box, nothing else. I've never worked with ChunkGenerators, BlockPopulators or WorldGenerators before.

In the thread, it told me to create a method in the main class called getDefaultWorldGenerator, which would return my custom generator, but I haven't done that yet since I'm not sure what it does, and I don't wanna mess up mine, and everyone else's worlds.

Thanks in advance.

 

Assist
Add in this

Code:java

public ChunkGenerator getDefaultWorldGenerator(String worldName, String id){
    return new Generator();
}

Where Generator is your generator class
Then you will need to tell bukkit to use the generator for certain worlds, so in your server's bukkit.yml you need to add

Code:text

worlds:
    MyWorldName:
        generator: MyPluginName

Finally, because you want this to affect world gen, which is done before plugins are normally loaded, you will need to add to your plugin.yml:

Code:text

load: STARTUP

to load the plugin almost immediately. More info on loading here.

 

GusGold
That's what I thought, but the problem is, I can't yet know the names of the worlds. I guess I could just locate the bukkit.yml file in their server folder, and add the world name in there (using FileConfiguration in my plugin) before generating it. Would that be a possibility?

 

You can assign the Generator on world creation if this is more what you are looking for.

Code:

World world = Bukkit.getServer().createWorld(new WorldCreator("World").environment(Environment.NORMAL).generator(new CustomChunkGen()));

 

iFamasssxD
Hmm.. I'll try that. Thanks for the suggestion, I'll update this post with the result.

 

Assist
Yeah, well and truly possible, but I would suggest making a server admin do it, as you would need to reload the server after setting it, and other inconvenient stuff. Just put a warning saying what to put into their bukkit.yml on load up.

iFamasssxD
Will this overwrite an existing world of the same name? or will it create another one?

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Not 100% sure. I dont think this will overwrite a current worlds.

 

iFamasssxD
So if bukkit.yml world is set to 'world' and I use

Code:java

World world = Bukkit.getServer().createWorld(new WorldCreator("world").environment(Environment.NORMAL).generator(new CustomChunkGen()));

on a startup loading plugin, will Bukkit generate the world, 'world', based on CustomChunkGen()?

 

GusGold
Well as I said, I (nor the server owners) know the names of the worlds yet, I'm generating new worlds using the plugin.

 

Assist
At what point do you know the name, because then iFamasssxD 's method sounds the way to go.

 

GusGold
I know the name when I create the world. This is what I'm using at the moment, though I haven't tested it yet since I'm trying to figure out something else.

Code:java

String worldName = "null";
 
public RealmCreator(String worldName) {
    this.worldName = worldName;
}
 
public void createWorld() {
    if (!(worldName.equalsIgnoreCase("") || worldName.equalsIgnoreCase("null"))) {
        if (Bukkit.getWorld(worldName) != null) {
            Bukkit.getServer().createWorld(new WorldCreator(worldName).environment(Environment.NORMAL).generator(new RealmGenerator()));
        } else {
            Bukkit.getLogger().severe("Unable to generate realm: world already exists.");
        }
 
    } else {
        Bukkit.getLogger().severe("Unable to generate realm: world name is null.");
    }
}
 
public String getName() {
    return worldName;
}

 

Assist
Just a note

Code:java

null != "null"

, so where you check if your world name is equal to "null", you should be check that

Code:java

 worldName == null 

Assist
But that code looks functional enough, though I have never used the .createWorld() before

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Oops . Thanks.

Edit: I assume you're talking about this line:

Code:java

if (Bukkit.getWorld(worldName) != null) {

That was wrong, but the line above it was correct (hence the !)