[forge-1.8-11.14.1.1334] CleanRoom Generator

[longlostbro]

I am attempting to create a mod similar to the SkyBlocks bukkit plugin. My first step is to make a CleanRoom Generator (create a world with no block generation).

 

Which is the best method of creating a world with no blocks in it? (so I can have islands in the sky with no ground below)

• Implement IWorldGenerator?
  
• Extend world provider?
  
• Implement IChunkProvider?
  
• Extend BiomeGenBase?
  
• Some better method?
  

[Abastro]

The best method would be your own 'clean room' WorldType, which provides the IChunkProvider.

[longlostbro]

I am getting a NullPointerException for some reason and I can't pinpoint where or why. Can someone give me a hand?

ERROR

---- Minecraft Crash Report ----
// Ouch. That hurt 

Time: 5/24/15 6:51 PM
Description: Exception ticking world

java.lang.NullPointerException: Exception ticking world
at net.minecraft.world.biome.WorldChunkManager.getRainfall(WorldChunkManager.java:90)
at net.minecraft.world.biome.BiomeCache$Block.<init>(BiomeCache.java:105)
at net.minecraft.world.biome.BiomeCache.getBiomeCacheBlock(BiomeCache.java:37)
at net.minecraft.world.biome.BiomeCache.func_180284_a(BiomeCache.java:48)
at net.minecraft.world.biome.WorldChunkManager.func_180300_a(WorldChunkManager.java:75)
at net.minecraft.world.World.getBiomeGenForCoordsBody(World.java:215)
at net.minecraft.world.WorldProvider.getBiomeGenForCoords(WorldProvider.java:429)
at net.minecraft.world.World.getBiomeGenForCoords(World.java:185)
at net.minecraft.world.World.canBlockFreezeBody(World.java:2880)
at net.minecraft.world.WorldProvider.canBlockFreeze(WorldProvider.java:508)
at net.minecraft.world.World.canBlockFreeze(World.java:2875)
at net.minecraft.world.World.func_175662_w(World.java:2863)
at net.minecraft.world.WorldServer.updateBlocks(WorldServer.java:422)
at net.minecraft.world.WorldServer.tick(WorldServer.java:228)
at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:763)
at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:669)
at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:171)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:540)
at java.lang.Thread.run(Thread.java:745)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
at net.minecraft.world.biome.WorldChunkManager.getRainfall(WorldChunkManager.java:90)
at net.minecraft.world.biome.BiomeCache$Block.<init>(BiomeCache.java:105)
at net.minecraft.world.biome.BiomeCache.getBiomeCacheBlock(BiomeCache.java:37)
at net.minecraft.world.biome.BiomeCache.func_180284_a(BiomeCache.java:48)
at net.minecraft.world.biome.WorldChunkManager.func_180300_a(WorldChunkManager.java:75)
at net.minecraft.world.World.getBiomeGenForCoordsBody(World.java:215)
at net.minecraft.world.WorldProvider.getBiomeGenForCoords(WorldProvider.java:429)
at net.minecraft.world.World.getBiomeGenForCoords(World.java:185)
at net.minecraft.world.World.canBlockFreezeBody(World.java:2880)
at net.minecraft.world.WorldProvider.canBlockFreeze(WorldProvider.java:508)
at net.minecraft.world.World.canBlockFreeze(World.java:2875)
at net.minecraft.world.World.func_175662_w(World.java:2863)
at net.minecraft.world.WorldServer.updateBlocks(WorldServer.java:422)
at net.minecraft.world.WorldServer.tick(WorldServer.java:228)

-- Affected level --
Details:
Level name: New World
All players: 1 total; [EntityPlayerMP['Player357'/0, l='New World', x=1.50, y=64.00, z=0.50]]
Chunk stats: ServerChunkCache: 625 Drop: 0
Level seed: -4952892408551608451
Level generator: ID 06 - CleanRoom, ver 0. Features enabled: true
Level generator options: 
Level spawn location: 7.00,64.00,7.00 - World: (7,64,7), Chunk: (at 7,4,7 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 10 game time, 10 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 81862 (now: false), thunder time: 127519 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:763)
at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:669)
at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:171)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:540)
at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
Minecraft Version: 1.8
Operating System: Windows 8.1 (amd64) version 6.3
Java Version: 1.8.0_45, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 433081584 bytes (413 MB) / 780664832 bytes (744 MB) up to 3791650816 bytes (3616 MB)
JVM Flags: 0 total; 
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v9.10 FML v8.0.37.1334 Minecraft Forge 11.14.1.1334 4 mods loaded, 4 mods active
mcp{9.05} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
FML{8.0.37.1334} [Forge Mod Loader] (forgeSrc-1.8-11.14.1.1334.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Forge{11.14.1.1334} [Minecraft Forge] (forgeSrc-1.8-11.14.1.1334.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
SkyBlocks{1.0} [skyBlocks] (bin) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available->Available->Available->Available
Loaded coremods (and transformers): 
Profiler Position: N/A (disabled)
Player Count: 1 / 8; [EntityPlayerMP['Player357'/0, l='New World', x=1.50, y=64.00, z=0.50]]
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fml,forge'

SOURCE

 

@Mod(modid = SkyBlocks.MODID, version = SkyBlocks.VERSION)
public class SkyBlocks
{
    public static final String MODID = "SkyBlocks";
    public static final String VERSION = "1.0";
    public static WorldType cleanRoom = new CleanRoomWorldType("CleanRoom");

    @EventHandler
    public void preInit(FMLPreInitializationEvent event) {
    	
    }
    
    @EventHandler
    public void Load(FMLInitializationEvent event){
    	LanguageRegistry.instance().addStringLocalization("generator.CleanRoom", "CleanRoom");
    }
    
    @EventHandler
    public void postInit(FMLPostInitializationEvent event) {
            
    }
    
    @EventHandler
    public void init(FMLInitializationEvent event)
    {
        
    }
    
}

 

public class CleanRoomWorldType extends WorldType {
    public CleanRoomWorldType(String name) {
    	super(name);      
    }

    @Override
    public WorldChunkManager getChunkManager(World world) {
        // This is our ChunkManager class, it controls rain, temp, biomes, and spawn location
        return new CleanRoomChunkManager(world);
    }

    @Override
    public IChunkProvider getChunkGenerator(World world, String generatorOptions) {
        // This is our ChunkProvider, this generates the world terrain.
        return new CleanRoomChunkProvider(world);
    }

    public boolean hasVoidParticles(boolean flag) {
        return flag; // Are their void particles?
    }

    public int getSeaLevel(World world) {
        // Sets the Average Ground Level, be careful with this one, it controls the Y value of your spawn point.
        return 64;
    }

    public double voidFadeMagnitude() {
        return 0.0D; // Sets the void fade, play with it to see which values work for you.
    }
}

 

public class CleanRoomChunkProvider implements IChunkProvider {
    private World world;
    private Random random;
    
    public CleanRoomChunkProvider(World world) {
        // Save the passed values for later use.
        this.world = world;
        random = new Random(world.getSeed());
    }    
    
@Override
public boolean chunkExists(int x, int z) {
	return true; // Of course it does, it's all air though...
}

public Chunk loadChunk(int chunkX, int chunkZ) {
        // Setting the random seed this way allows for the same seed to generate the same chunk
        // every time, even though we don't use it in this tutorial.
        random.setSeed((long)chunkX * 341873128712L + (long)chunkZ * 132897987541L);
        // Create an empty chunk
        Chunk chunk = new Chunk(world, chunkX, chunkZ);
        if (chunkX!=0 || chunkZ!=0) { // Only generate the 0,0 chunk.
            return chunk;
        }
        // Generate extended block storage
        for (int y=0; y<16; y++) {
            chunk.getBlockStorageArray()[y] = new ExtendedBlockStorage(y << 4, true);
        }
        // Generate 16x16 square of grass blocks at y value of 63.
        for (int x=0; x<16; x++) {
            for (int z=0; z<16; z++) {
                chunk.getBlockStorageArray()[3].set(x, 15/*y*/, z, Blocks.air.getDefaultState());
            }
        }
        chunk.generateSkylightMap();
        return chunk;
    }

@Override
public Chunk provideChunk(int x, int z) {
	return loadChunk(x, z);
}
@Override
public Chunk provideChunk(BlockPos blockPosIn) {
	return loadChunk(blockPosIn.getX(), blockPosIn.getY());
}
@Override
public void populate(IChunkProvider p_73153_1_, int p_73153_2_,
		int p_73153_3_) {
	//populate with ore or whatever
}
@Override
public boolean func_177460_a(IChunkProvider p_177460_1_, Chunk p_177460_2_,
		int p_177460_3_, int p_177460_4_) {
	// TODO Auto-generated method stub
	return false;
}
@Override
public boolean saveChunks(boolean p_73151_1_, IProgressUpdate p_73151_2_) {
	// TODO Auto-generated method stub
	return false;
}
@Override
public boolean unloadQueuedChunks() {
	// TODO Auto-generated method stub
	return false;
}
@Override
public boolean canSave() {
	return true;
}
@Override
public String makeString() {
	// TODO Auto-generated method stub
	return "CleanRoom";
}
@Override //getPossibleCreatures
public List func_177458_a(EnumCreatureType p_177458_1_, BlockPos p_177458_2_) {
	return null;
}
@Override
public BlockPos getStrongholdGen(World worldIn, String p_180513_2_,
		BlockPos p_180513_3_) {
	return null;
}
@Override
public int getLoadedChunkCount() {
	return 0;
}
@Override
public void recreateStructures(Chunk p_180514_1_, int p_180514_2_,
		int p_180514_3_) {

}
@Override
public void saveExtraData() {

}

}

 

public class CleanRoomChunkManager extends WorldChunkManager {
    private World world;
    private List<BiomeGenBase> biomesToSpawnIn;

    public CleanRoomChunkManager() {
        biomesToSpawnIn = new ArrayList<BiomeGenBase>();
        biomesToSpawnIn.add(BiomeGenBase.plains); // Which biomes can you spawn in?
    }

    public CleanRoomChunkManager(World world) {
        this();
        this.world = world; // save the world value if you need it later.
    }

    // Gets the list of valid biomes for the player to spawn in.
    public List getBiomesToSpawnIn() {
        return biomesToSpawnIn;
    }

    // Returns the BiomeGenBase related to the x, z position on the world.
    public BiomeGenBase getBiomeGenAt(int x, int z) {
        return BiomeGenBase.plains; // Always plains here
    }

    // checks given Chunk's Biomes against List of allowed ones
    public boolean areBiomesViable(int par1, int par2, int par3, List par4List) {
        return true;
    }

    // Finds a valid position within a range, that is one of the listed biomes.
    public BlockPos findBiomePosition(int i, int j, int k, List list, Random random) {
        // With the integration of the server into the client, the spawn location is randomized a bit.
        // EntityPlayerMP will adjust the location you give here randomly in the range of -10 to +9
        // This is done to both the X and Z locations.
        // The Y location is ideally just above the top solid block at that location.
        // NOTE:  If the location given does not have a grass block, the location will be further randomized.
        return new BlockPos(7, 0, 7);
    }
}

[Abastro]

1. What is your minecraft and forge version?

2. I think you should make it so that there is no chunk on the world.

[longlostbro]

11.14.1.1334 the latest recommended

 

In which class would i do that? Im new to world generation..

[Abastro]

11.14.1.1334 the latest recommended

 

In which class would i do that? Im new to world generation..

So is that 1.7 or 2.8?

And surely, on public boolean chunkExists(int x, int z)

 

[longlostbro]

1.8 returning fals for chunk exists still causes the same error

[laci200270]

Take a look at: https://github.com/Messen/VoidMod

[Abastro]

1.8 returning fals for chunk exists still causes the same error

I inspected it and only found out that the exception is impossible..

Can you debug it with some breakpoints?

[longlostbro]

SOLVED:

 

Apparently the issue is in my world chunk manager. I decided to just use the default 'new WorldChunkManager(world)' and the cleanroom generator now works great!