Hi,

I tried adding my custom mobs to the spawn list of my custom biome but it crashes:

java.lang.NullPointerException: Registry Object not present on my entitytype

 

I guess it's because EntityTypes are registered after Biomes so what can I do ?

BinaryMod.java

Spoiler

@Mod(MOD_ID)
public class BinaryMod
{
    public static final String MOD_ID = "binarymod";
    public static final Logger LOGGER = LogManager.getLogger();

    public BinaryMod()
    {
        final IEventBus eventBus = FMLJavaModLoadingContext.get().getModEventBus();

        eventBus.addListener(this::setup);
        eventBus.addListener(this::clientSetup);

        BlockInit.BLOCKS.register(eventBus);
        ItemInit.ITEMS.register(eventBus);
        EntityInit.ENTITIES.register(eventBus);

        BiomeInit.BIOMES.register(eventBus);
        DimensionInit.MOD_DIMENSIONS.register(eventBus);

        MinecraftForge.EVENT_BUS.register(this);
    }

    private void setup(final FMLCommonSetupEvent event)
    {
        GenerationInit.initOres();
    }

    private void clientSetup(final FMLClientSetupEvent event)
    {
        RenderInit.initEntities();
    }
}

 

EntityInit.java

Spoiler

public class EntityInit
{
    public static DeferredRegister<EntityType<?>> ENTITIES = new DeferredRegister<>(ForgeRegistries.ENTITIES, MyMod.MOD_ID);

    public static RegistryObject<EntityType<OneEntity>> ONE = ENTITIES.register("one", () -> EntityType.Builder.<OneEntity>create(OneEntity::new, EntityClassification.CREATURE).size(0.6F, 2F).build(BinaryMod.MOD_ID + "one"));
}

 

BiomeInit.java

Spoiler

public class BiomeInit
{
    public static final DeferredRegister<Biome> BIOMES = new DeferredRegister<>(ForgeRegistries.BIOMES, BinaryMod.MOD_ID);

    public static final RegistryObject<Biome> BINARY_BIOME = BIOMES.register("binary_biome", () -> new BinaryBiome());
}

 

BinaryBiome.java

Spoiler

public class BinaryBiome extends Biome
{
    public BinaryBiome()
    {
        super(new Builder().surfaceBuilder(new BinarySurfaceBuilder(SurfaceBuilderConfig::deserialize), new SurfaceBuilderConfig(BlockInit.BINARY_BLOCK.get().getDefaultState(), BlockInit.ON_BINARY_BLOCK.get().getDefaultState(), null))
                .precipitation(Biome.RainType.NONE)
                .category(Category.NONE)
                .depth(0.1F)
                .downfall(0F)
                .scale(0.02F)
                .temperature(1.5F)
                .waterColor(0x00FF00).waterFogColor(0x00FF00)
                .parent(null));

        BinDimBiomeFeatures.addOres(this);
        BinDimBiomeFeatures.addStructures(this);
        this.addSpawn(EntityClassification.CREATURE, new SpawnListEntry(EntityInit.ONE.get(), 50, 1, 3));
		CRASHES HERE
	}
}

 

 

Thanks in advance.

 

 

Btw how do I add spawn eggs ?

Instead of adding the spawns in your biome constructor, add them in FMLCommonSetupEvent, then everything is registered.

 

Not 100% sure on the current method of adding spawn eggs though