[1.12 to 1.14] Make custom mobs spawn only at night (custom biome)

[Alex Sim]

Hello, I'm having trouble getting a custom mob spawn at night in my custom biome.

 

Adding a spawn for a vanilla Zombie will automatically make it spawn only at night,

addSpawn(EntityClassification.MONSTER, Biome.SpawnListEntry(EntityType.ZOMBIE, 100, 5, 8))

 

but doing the same with my custom entity, which extends the ZombieEntity class and has EntityClassification.MONSTER classification will still make it spawn during the day

[Choonster]

It looks like spawning conditions are handled by EntitySpawnPlacementRegistry in 1.14.

 

You need to call EntitySpawnPlacementRegistry.register with your EntityType and a predicate that determines the conditions under which it can spawn. Zombies and other hostile mobs use MonsterEntity::func_223325_c for the predicate, this checks the difficulty and the light level.

Edited August 12, 2019 by Choonster

[Alex Sim]

19 minutes ago, Choonster said:

It looks like spawning conditions are handled by EntitySpawnPlacementRegistry in 1.14.

 

You need to call EntitySpawnPlacementRegistry.register with your EntityType and a predicate that determines the conditions under which it can spawn. Zombies and other hostile mobs use MonsterEntity::func_223325_c for the predicate, this checks the difficulty and the light level.

Thank you, but the register function is private inside EntitySpawnPlacementRegistry, isn't there any forge registry to handle this, or do I have to use reflection?

[Choonster]

3 minutes ago, Alex Sim said:

Thank you, but the register function is private inside EntitySpawnPlacementRegistry, isn't there any forge registry to handle this, or do I have to use reflection?

 

It was made public again in this PR (1.14.4-28.0.37). Update Forge.

[Alex Sim]

21 minutes ago, Choonster said:

 

It was made public again in this PR (1.14.4-28.0.37). Update Forge.

Thank you, that worked

Edited August 12, 2019 by Alex Sim