I try to make my custom entity spawn in world. But when I test in Superflat world, my custom entities only spawn in villagers house.

Can anybody tell me why, and how to spawn it correctly?

Here is the code:

OriginiumSlugEntity.java

Spoiler

public class OriginiumSlugEntity extends MonsterEntity {
   private OriginiumSlugEntity.SummonOriginiumSlugGoal summonOriginiumSlug;
   public EntitySize size;

   public OriginiumSlugEntity(EntityType<? extends OriginiumSlugEntity> typeIn, World worldIn) {
      super(typeIn, worldIn);
   }

   public static boolean spawnCondition (EntityType<? extends OriginiumSlugEntity> entityType, IWorld world, SpawnReason spawnReason, BlockPos pos, Random random) {
      //return world.getBlockState(pos.down()).getBlock() == Blocks.GRASS_BLOCK;
      return true;
   }

   protected void registerGoals() {
      this.summonOriginiumSlug = new OriginiumSlugEntity.SummonOriginiumSlugGoal(this);
      this.goalSelector.addGoal(10, new LookAtGoal(this, AnimalEntity.class, 8.0F));
      this.goalSelector.addGoal(10, new LookRandomlyGoal(this));
      this.goalSelector.addGoal(10, new LookAtGoal(this, PlayerEntity.class, 8.0F));
      this.goalSelector.addGoal(10, new LookAtGoal(this, AbstractVillagerEntity.class, 8.0F));
      this.goalSelector.addGoal(10, new RandomWalkingGoal(this, 1.0F));
      this.goalSelector.addGoal(1, new SwimGoal(this));
      this.goalSelector.addGoal(10, new RandomSwimmingGoal(this, 1.0F, 120));
      this.goalSelector.addGoal(3, this.summonOriginiumSlug);
      this.goalSelector.addGoal(4, new MeleeAttackGoal(this, 1.0D, false));
      this.targetSelector.addGoal(1, (new HurtByTargetGoal(this)).setCallsForHelp());
      this.targetSelector.addGoal(2, new NearestAttackableTargetGoal<>(this, AnimalEntity.class, true));
      this.targetSelector.addGoal(2, new NearestAttackableTargetGoal<>(this, PlayerEntity.class, true));
      this.targetSelector.addGoal(2, new NearestAttackableTargetGoal<>(this, AbstractVillagerEntity.class, true));
   }

   /**
    * Returns the Y Offset of this entity.
    */

   public double getYOffset() {
      return 0.1D;
   }

   protected float getStandingEyeHeight(Pose poseIn, EntitySize sizeIn) {
      return 0.1F;
   }

   protected void registerAttributes() {
      super.registerAttributes();
      this.getAttribute(SharedMonsterAttributes.MAX_HEALTH).setBaseValue(8.0D);
      this.getAttribute(SharedMonsterAttributes.MOVEMENT_SPEED).setBaseValue(0.25D);
      this.getAttribute(SharedMonsterAttributes.ATTACK_DAMAGE).setBaseValue(1.0D);
   }

   protected boolean func_225502_at_() {
      return false;
   }


   /**
    * Called when the entity is attacked.
    */
   public boolean attackEntityFrom(DamageSource source, float amount) {
      if (this.isInvulnerableTo(source)) {
         return false;
      } else {
         if ((source instanceof EntityDamageSource || source == DamageSource.MAGIC) && this.summonOriginiumSlug != null) {
            this.summonOriginiumSlug.notifyHurt();
         }

         return super.attackEntityFrom(source, amount);
      }
   }


   public static boolean func_223331_b(EntityType<OriginiumSlugEntity> p_223331_0_, IWorld p_223331_1_, SpawnReason p_223331_2_, BlockPos p_223331_3_, Random p_223331_4_) {
      if (func_223324_d(p_223331_0_, p_223331_1_, p_223331_2_, p_223331_3_, p_223331_4_)) {
         PlayerEntity playerentity = p_223331_1_.getClosestPlayer((double) p_223331_3_.getX() + 0.5D, (double) p_223331_3_.getY() + 0.5D, (double) p_223331_3_.getZ() + 0.5D, 5.0D, true);
         return playerentity == null;
      } else {
         return false;
      }
   }


   static class SummonOriginiumSlugGoal extends Goal {
      private final OriginiumSlugEntity originiumslug;
      private int lookForFriends;

      public SummonOriginiumSlugGoal(OriginiumSlugEntity originiumslugIn) {
         this.originiumslug = originiumslugIn;
      }

      public void notifyHurt() {
         if (this.lookForFriends == 0) {
            this.lookForFriends = 20;
         }

      }

      public boolean shouldExecute() {
         return this.lookForFriends > 0;
      }

      @Nullable
      public AxisAlignedBB getCollisionBox(Entity entityIn) {
         return new AxisAlignedBB(-4.0, -3.0, -5.0, 4.0, 3.0, 5.0);
      }
   }
}

 

EntitySpawnHandler.java

Spoiler

public class EntitySpawnHandler {
    public static void register(){
        EntitySpawnPlacementRegistry.register(EntityHandler.ORIGINIUMSLUG, EntitySpawnPlacementRegistry.PlacementType.ON_GROUND, Heightmap.Type.MOTION_BLOCKING_NO_LEAVES, OriginiumSlugEntity::spawnCondition);
        PLAINS.getSpawns(EntityClassification.MONSTER).clear();//only for test

        registerEntityWorldSpawn(EntityHandler.ORIGINIUMSLUG, 100, PLAINS, DESERT, MOUNTAINS, FOREST, TAIGA, SWAMP, NETHER, BEACH, DESERT_HILLS, WOODED_HILLS,
                TAIGA_HILLS, MOUNTAIN_EDGE, JUNGLE, JUNGLE_HILLS, JUNGLE_EDGE, STONE_SHORE, BIRCH_FOREST,
                BIRCH_FOREST_HILLS, DARK_FOREST, GIANT_TREE_TAIGA, GIANT_TREE_TAIGA_HILLS, WOODED_MOUNTAINS, SAVANNA, SAVANNA_PLATEAU, BADLANDS, WOODED_BADLANDS_PLATEAU, BADLANDS_PLATEAU, GRAVELLY_MOUNTAINS,
                TAIGA_MOUNTAINS, SWAMP_HILLS, MODIFIED_JUNGLE, MODIFIED_JUNGLE_EDGE, TALL_BIRCH_FOREST, TALL_BIRCH_HILLS,
                DARK_FOREST_HILLS, GIANT_SPRUCE_TAIGA, GIANT_TREE_TAIGA_HILLS, MODIFIED_GRAVELLY_MOUNTAINS, SHATTERED_SAVANNA, SHATTERED_SAVANNA_PLATEAU,
                ERODED_BADLANDS, MODIFIED_WOODED_BADLANDS_PLATEAU, MODIFIED_BADLANDS_PLATEAU);
    }

    public static void registerEntityWorldSpawn(EntityType<?> entity, int weight, Biome... biomes) {
        for (Biome biome : biomes) {
            if (biome != null) {
                biome.getSpawns(entity.getClassification()).add(new Biome.SpawnListEntry(entity, weight, 1, 10));
            }
        }
    }
}

 

Thank you for your help.

 

By the way, now I need to generate some ore, but I don't know how to start. Could you please tell me how?

Edited March 27, 20205 yr by NGYF

First, biome has an addSpawn method which you should use. Second, WorldEntitySpawner#func_226701_a_ should answer why your entity spawns in houses. Basic answer is that it has to do with the light level. Finally, look at DefaultBiomeFeatures if you want to figure that out.