Entity spawn reasons
Generated from the 26.3 decompile by
tools/gen_reference.py. Do not edit by hand.
Every EntitySpawnReason constant, in declaration order, with what each one gates — the classes that compare against it and so behave differently for that reason — and how many classes pass it. A reason with an empty gates column changes nothing by itself: it is a label the spawn path carries for other code to read. EntitySpawnReason.isSpawner folds SPAWNER and TRIAL_SPAWNER together and EntitySpawnReason.ignoresLightRequirements is true of TRIAL_SPAWNER alone. See entity lifecycle.
19 reasons · 13 of them tested somewhere · 41 test sites
| # | reason | what it gates | classes that pass it |
|---|---|---|---|
| 0 | EntitySpawnReason.NATURAL | ZombieHorse.finalizeSpawn; Drowned.finalizeSpawn; Husk.finalizeSpawn; Raider.finalizeSpawn | 4 |
| 1 | EntitySpawnReason.CHUNK_GENERATION | nothing tests it | 2 |
| 2 | EntitySpawnReason.SPAWNER | Mob.checkMobSpawnRules (through EntitySpawnReason.isSpawner); SkeletonHorse.checkSkeletonHorseSpawnRules (through EntitySpawnReason.isSpawner); Endermite.checkEndermiteSpawnRules (through EntitySpawnReason.isSpawner); Guardian.checkGuardianSpawnRules (through EntitySpawnReason.isSpawner); Monster.checkSurfaceMonstersSpawnRules (through EntitySpawnReason.isSpawner); Silverfish.checkSilverfishSpawnRules (through EntitySpawnReason.isSpawner); Slime.checkSlimeSpawnRules (through EntitySpawnReason.isSpawner); Stray.checkStraySpawnRules (through EntitySpawnReason.isSpawner); Drowned.checkDrownedSpawnRules (through EntitySpawnReason.isSpawner) | 2 |
| 3 | EntitySpawnReason.STRUCTURE | PatrollingMonster.finalizeSpawn; Piglin.finalizeSpawn; Drowned.finalizeSpawn | 9 |
| 4 | EntitySpawnReason.BREEDING | Villager.finalizeSpawn | 41 |
| 5 | EntitySpawnReason.MOB_SUMMONED | nothing tests it | 2 |
| 6 | EntitySpawnReason.JOCKEY | nothing tests it | 5 |
| 7 | EntitySpawnReason.EVENT | TraderLlama.finalizeSpawn; PatrollingMonster.finalizeSpawn | 5 |
| 8 | EntitySpawnReason.CONVERSION | Husk.finalizeSpawn; Zombie.finalizeSpawn; Zombie.handleAttributes | 5 |
| 9 | EntitySpawnReason.REINFORCEMENT | Drowned.checkDrownedSpawnRules | 1 |
| 10 | EntitySpawnReason.TRIGGERED | Warden.finalizeSpawn | 12 |
| 11 | EntitySpawnReason.BUCKET | Axolotl.finalizeSpawn | 1 |
| 12 | EntitySpawnReason.SPAWN_ITEM_USE | nothing tests it | 4 |
| 13 | EntitySpawnReason.COMMAND | nothing tests it | 2 |
| 14 | EntitySpawnReason.DISPENSER | nothing tests it | 5 |
| 15 | EntitySpawnReason.PATROL | PatrollingMonster.finalizeSpawn | 1 |
| 16 | EntitySpawnReason.TRIAL_SPAWNER | Mob.checkMobSpawnRules (through EntitySpawnReason.isSpawner); Animal.checkAnimalSpawnRules (through EntitySpawnReason.ignoresLightRequirements); SkeletonHorse.checkSkeletonHorseSpawnRules (through EntitySpawnReason.isSpawner); SkeletonHorse.checkSkeletonHorseSpawnRules (through EntitySpawnReason.ignoresLightRequirements); Endermite.checkEndermiteSpawnRules (through EntitySpawnReason.isSpawner); Guardian.checkGuardianSpawnRules (through EntitySpawnReason.isSpawner); Monster.checkMonsterSpawnRules (through EntitySpawnReason.ignoresLightRequirements); Monster.checkSurfaceMonstersSpawnRules (through EntitySpawnReason.isSpawner); Silverfish.checkSilverfishSpawnRules (through EntitySpawnReason.isSpawner); Slime.checkSlimeSpawnRules (through EntitySpawnReason.isSpawner); Stray.checkStraySpawnRules (through EntitySpawnReason.isSpawner); Drowned.checkDrownedSpawnRules (through EntitySpawnReason.isSpawner); Drowned.checkDrownedSpawnRules (through EntitySpawnReason.ignoresLightRequirements) | 2 |
| 17 | EntitySpawnReason.LOAD | Zombie.handleAttributes | 6 |
| 18 | EntitySpawnReason.DIMENSION_TRAVEL | Zombie.handleAttributes | 1 |