World generation/terrain.

Discussion in 'Spigot Plugin Development' started by avighnash, May 27, 2016.

  1. avighnash

    avighnash

    I have been interested in terrain generation, so I decided to look more farther into it. After some research, I learned how to make a flat world.
    Here is the code:

    Code (Text):
    package us.universalpvp.world;

    import java.util.ArrayList;
    import java.util.List;
    import java.util.Random;

    import org.bukkit.Material;
    import org.bukkit.World;
    import org.bukkit.generator.BlockPopulator;
    import org.bukkit.generator.ChunkGenerator;
    import org.bukkit.plugin.java.JavaPlugin;

    public class WorldMain extends JavaPlugin {

        public void onEnable() {

        }

        public void onDisable() {

        }

        public ChunkGenerator getDefaultWorldGenerator(String worldName, String GenId) {
            return new us.universalpvp.world.WorldMain.BasicChunkGenerator();
        }

        public class BasicChunkGenerator extends ChunkGenerator {

            void setBlock(int x, int y, int z, byte[][] chunk, Material material) {
                if (chunk[y >> 4] == null)
                    chunk[y >> 4] = new byte[16 * 16 * 16];
                if (!(y <= 256 && y >= 0 && x <= 16 && x >= 0 && z <= 16 && z >= 0))
                    return;
                try {
                    chunk[y >> 4][((y & 0xF) << 8) | (z << 4) | x] = (byte) material.getId();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

            @Override
            public byte[][] generateBlockSections(World world, Random rand, int ChunkX, int ChunkZ, BiomeGrid biome) {
                return null;
            }

            @Override
            public List<BlockPopulator> getDefaultPopulators(World world) {
                ArrayList<BlockPopulator> pops = new ArrayList<BlockPopulator>();
                // Add Block populators here
                return pops;
            }
        }

    }
     
    the only problem, is that the world is not flat.
    I put this in my Bukkit.yml"

    Code (Text):
    worlds:
      world:
        generator: WorldGen
    but does not work.
    How do I fix this? Thanks!
     
    #1 avighnash, May 27, 2016
  3. ProJoosh

    ProJoosh

    in your plugin.yml set Set load: STARTUP
     
    #2 ProJoosh, May 27, 2016
  5. avighnash

    avighnash

    I did load: startup but not load: STARTUP... does case matter in it?
     
    #3 avighnash, May 27, 2016
  7. ProJoosh

    ProJoosh

    mhm, i dont think so, give it a try though?
     
    #4 ProJoosh, May 27, 2016
  9. avighnash

    avighnash

    does not work. is it because the world "world" is already made?
     
    #5 avighnash, May 27, 2016
  11. ProJoosh

    ProJoosh

    tr y removing the current work.
     
    #6 ProJoosh, May 27, 2016
  13. avighnash

    avighnash

    The server crashed with this error:

    Code (Text):
    [14:53:28 ERROR]: Encountered an unexpected exception
    net.minecraft.server.v1_8_R3.ReportedException: Exception generating new chunk        at net.minecraft.server.v1_8_R3.WorldServer.a(WorldServer.java:816) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.MinecraftServer.a(MinecraftServer.java:273) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:263) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:525) [spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at java.lang.Thread.run(Unknown Source) [?:1.8.0_91]
    Caused by: java.lang.UnsupportedOperationException: Custom generator is missing required methods: generate(), generateBlockSections() and generateExtBlockSections()
            at org.bukkit.generator.ChunkGenerator.generate(ChunkGenerator.java:78) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at org.bukkit.craftbukkit.v1_8_R3.generator.CustomChunkGenerator.getOrCreateChunk(CustomChunkGenerator.java:129) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.ChunkProviderServer.originalGetChunkAt(ChunkProviderServer.java:142) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:118) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:97) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at org.bukkit.craftbukkit.v1_8_R3.CraftWorld.loadChunk(CraftWorld.java:253) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at org.bukkit.craftbukkit.v1_8_R3.CraftWorld.loadChunk(CraftWorld.java:150) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at org.bukkit.craftbukkit.v1_8_R3.CraftWorld.getHighestBlockYAt(CraftWorld.java:99) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at org.bukkit.generator.ChunkGenerator.canSpawn(ChunkGenerator.java:270) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.WorldServer.canSpawn(WorldServer.java:199) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.WorldServer.b(WorldServer.java:879) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.WorldServer.a(WorldServer.java:801) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            ... 4 more
    [14:53:28 ERROR]:       Cause of unexpected exception was
    java.lang.UnsupportedOperationException: Custom generator is missing required methods: generate(), generateBlockSections() and generateExtBlockSections()
            at org.bukkit.generator.ChunkGenerator.generate(ChunkGenerator.java:78) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at org.bukkit.craftbukkit.v1_8_R3.generator.CustomChunkGenerator.getOrCreateChunk(CustomChunkGenerator.java:129) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.ChunkProviderServer.originalGetChunkAt(ChunkProviderServer.java:142) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:118) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:97) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at org.bukkit.craftbukkit.v1_8_R3.CraftWorld.loadChunk(CraftWorld.java:253) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at org.bukkit.craftbukkit.v1_8_R3.CraftWorld.loadChunk(CraftWorld.java:150) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at org.bukkit.craftbukkit.v1_8_R3.CraftWorld.getHighestBlockYAt(CraftWorld.java:99) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at org.bukkit.generator.ChunkGenerator.canSpawn(ChunkGenerator.java:270) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.WorldServer.canSpawn(WorldServer.java:199) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.WorldServer.b(WorldServer.java:879) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.WorldServer.a(WorldServer.java:801) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.MinecraftServer.a(MinecraftServer.java:273) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:263) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:525) [spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at java.lang.Thread.run(Unknown Source) [?:1.8.0_91]
     
    #7 avighnash, May 27, 2016
  15. ProJoosh

    ProJoosh

    Caused by: java.lang.UnsupportedOperationException: Custom generator is missing required methods: generate(), generateBlockSections() and generateExtBlockSections()
     
    #8 ProJoosh, May 27, 2016
  17. avighnash

    avighnash

    Okay, new error:

    Code (Text):
    [15:24:15 ERROR]: Encountered an unexpected exception
    net.minecraft.server.v1_8_R3.ReportedException: Exception generating new chunk        at net.minecraft.server.v1_8_R3.WorldServer.a(WorldServer.java:816) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.MinecraftServer.a(MinecraftServer.java:273) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:263) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:525) [spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at java.lang.Thread.run(Unknown Source) [?:1.8.0_91]
    Caused by: java.lang.NullPointerException
            at org.bukkit.craftbukkit.v1_8_R3.generator.CustomChunkGenerator.getOrCreateChunk(CustomChunkGenerator.java:130) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.ChunkProviderServer.originalGetChunkAt(ChunkProviderServer.java:142) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:118) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:97) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at org.bukkit.craftbukkit.v1_8_R3.CraftWorld.loadChunk(CraftWorld.java:253) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at org.bukkit.craftbukkit.v1_8_R3.CraftWorld.loadChunk(CraftWorld.java:150) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at org.bukkit.craftbukkit.v1_8_R3.CraftWorld.getHighestBlockYAt(CraftWorld.java:99) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at org.bukkit.generator.ChunkGenerator.canSpawn(ChunkGenerator.java:270) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.WorldServer.canSpawn(WorldServer.java:199) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.WorldServer.b(WorldServer.java:879) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.WorldServer.a(WorldServer.java:801) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            ... 4 more
    [15:24:15 ERROR]:       Cause of unexpected exception was
    java.lang.NullPointerException
            at org.bukkit.craftbukkit.v1_8_R3.generator.CustomChunkGenerator.getOrCreateChunk(CustomChunkGenerator.java:130) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.ChunkProviderServer.originalGetChunkAt(ChunkProviderServer.java:142) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:118) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:97) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at org.bukkit.craftbukkit.v1_8_R3.CraftWorld.loadChunk(CraftWorld.java:253) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at org.bukkit.craftbukkit.v1_8_R3.CraftWorld.loadChunk(CraftWorld.java:150) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at org.bukkit.craftbukkit.v1_8_R3.CraftWorld.getHighestBlockYAt(CraftWorld.java:99) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at org.bukkit.generator.ChunkGenerator.canSpawn(ChunkGenerator.java:270) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.WorldServer.canSpawn(WorldServer.java:199) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.WorldServer.b(WorldServer.java:879) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.WorldServer.a(WorldServer.java:801) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.MinecraftServer.a(MinecraftServer.java:273) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.DedicatedServer.init(DedicatedServer.java:263) ~[spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:525) [spigot.jar:git-Spigot-e4d4710-e1ebe52]
            at java.lang.Thread.run(Unknown Source) [?:1.8.0_91]
    Where is the NPE pointed to in my code?

    new class:

    Code (Text):
    package us.universalpvp.world;

    import java.util.ArrayList;
    import java.util.List;
    import java.util.Random;

    import org.bukkit.Material;
    import org.bukkit.World;
    import org.bukkit.generator.BlockPopulator;
    import org.bukkit.generator.ChunkGenerator;
    import org.bukkit.plugin.java.JavaPlugin;

    public class WorldMain extends JavaPlugin {

        public void onEnable() {

        }

        public void onDisable() {

        }

        public ChunkGenerator getDefaultWorldGenerator(String worldName, String GenId) {
            return new us.universalpvp.world.WorldMain.BasicChunkGenerator();
        }

        public class BasicChunkGenerator extends ChunkGenerator {

            void setBlock(int x, int y, int z, short[][] chunk, Material material) {
                if (chunk[y >> 4] == null)
                    chunk[y >> 4] = new short[16 * 16 * 16];
                if (!(y <= 256 && y >= 0 && x <= 16 && x >= 0 && z <= 16 && z >= 0))
                    return;
                try {
                    chunk[y >> 4][((y & 0xF) << 8) | (z << 4) | x] = (byte) material.getId();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }

            @Override
            public byte[][] generateBlockSections(World world, Random rand, int ChunkX, int ChunkZ, BiomeGrid biome) {
                return null;
            }

            @Override
            public List<BlockPopulator> getDefaultPopulators(World world) {
                ArrayList<BlockPopulator> pops = new ArrayList<BlockPopulator>();
                // Add Block populators here
                return pops;
            }

            public byte[] generate(World world, Random random, int x, int z) {
                return null;
            }

            public short[][] generateExtBlockSections(World world, Random rand, int x, int z) {
                return null;
            }
        }

    }
     
    I took a look at the bukkit java docs for this info.
     
    #9 avighnash, May 27, 2016
  19. Jamezrin

    Jamezrin

    You are literally returning null on the generate methods, what do you expect to happen?
     
    #10 Jamezrin, May 27, 2016
  21. avighnash

    avighnash

    Yes because I am not using those methods... well true. I'll see what I can do.
     
    #11 avighnash, May 27, 2016
  23. avighnash

    avighnash

    Any ideas? I still have no luck.
     
    #12 avighnash, May 28, 2016
  25. lookcook

    lookcook

    You wot m8
     
    #13 lookcook, May 28, 2016
  27. avighnash

    avighnash

    Learning* oops xD
     
    #14 avighnash, May 28, 2016
  29. avighnash

    avighnash

    Bump?
     
    #15 avighnash, May 28, 2016
  31. avighnash

    avighnash

    Still get no answers :/
     
    #16 avighnash, May 28, 2016
  33. ProJoosh

    ProJoosh

    Not many people know about world generation, the only person i know who does is @minelazz
     
    #17 ProJoosh, May 28, 2016
  35. minelazz

    minelazz
    Supporter

    Simple, trash the bukkit API for world generators. It has been outdated a long time. Depending on what need it for, it might be completely unusable.

    If you have problems with these simple things, I would not recommend starting on a world generator. If really want to learn it, you could startof here;
    https://github.com/Wolf-in-a-bukkit...aftbukkit/generator/CustomChunkGenerator.java

    It is a tiny bit outdated, but explains how the world generators in minecraft works. It would basicly not create any terrain, as that is up to you to handle. It will only shows you how the mechanics around it works.


    Edit: To start of;
    Code (Text):
      public ChunkData generateChunkData(World world, Random random, int x, int z, BiomeGrid biome)
      {
        //TODO return new chunk data;
      }
     
    #18 minelazz, May 28, 2016
    Last edited: May 28, 2016
    • Like Like x 2
  37. avighnash

    avighnash

    Did you have to use this class for your custom world generator?
     
    #19 avighnash, May 28, 2016
(You must log in or sign up to post here.)