Blockhaven: villagers, witches, illagers and piglins on Java's models

[k1519035]

This is the second batch of mobs on Java 1.20.1's own models.

Builds on #69 (and #68). Until those merge, this PR also shows their commits; only the last commit is new.

Models (entity/javamodels.js, new)

Mob	Java model	Pack textures
Villagers (each profession)	VillagerModel: 10-tall head and nose, robe, folded arms, hat with brim	villager/villager + villager/type/plains + villager/profession/<profession>, layered as VillagerProfessionLayer draws them
Wandering trader	VillagerModel	wandering_trader
Zombie villager	ZombieVillagerModel (zombie arms)	zombie_villager/zombie_villager + its plains type
Witch	WitchModel: own head, nose with mole, four-tier hat	witch (64×128)
Pillager, vindicator, evoker	IllagerModel: folded arms swap for free arms when used	illager/pillager, vindicator, evoker
Piglin, zombified piglin	PiglinModel: player body with outer layers, wide head, snout, tusks, ears	piglin/piglin, piglin/zombified_piglin

Poses

• Villagers: legs swing half as far as a player's, and the head follows the gaze.
• Witch: the nose wobbles, and tilts while she holds something.
• Illagers (IllagerModel.setupAnim):
  • Arms folded by default.
  • A vindicator hunting raises and brings down its axe (swingWeaponDown).
  • An evoker raises its arms while casting (SPELLCASTING, held 1.5 s after summoning fangs).
  • A pillager keeps its arms at its sides, holds its crossbow on a target and charges it in the last 1.25 s before it shoots.
  • Folded arms hide the held item, as IllagerRenderer does.
• Piglins: ears flap with each step; zombified piglins use zombie arms.

Larger entity layers

• Why: Java's textures run up to 64×128 (the witch), and 128×128 for some mobs coming next. Entity texture layers are now 128×128, with each texture in the top-left at its own size and texels measured against the layer.
• Unchanged: existing painted skins and the player's custom skin are placed the same way.
• Pack loading: readEntityTexture scales HD pack images to Java's size, and can lay an image over another (for villager layers).

Paint fix

• A painted decoration can no longer spill outside its own face (the painter clips to the face being painted).
• In the new layouts the villager's folded-hands bar was spilling onto the hat brim, which showed as two stray pixels beside the head.

Testing

• tests/javamodels.test.mjs (new) checks:
  • Villager head, folded arms, brim and the order of its pack layers.
  • The witch's 64×128 texture and hat chain.
  • Illager arm folding, spellcasting and the axe swing.
  • Piglin ears and villager leg swing.
  • The painter's clip.
• humanoid.test.mjs is updated for the 128-px layers.
• node --test: 129 pass.
• By eye (headless Edge):
  • All nine mobs with a pack built by tools/pack-from-jar.mjs from the official 1.20.1 jar (local only), and with their painted defaults.
  • Close-ups: the witch's hat, the farmer's straw hat, piglin ears and walk, the vindicator's axe swing, the evoker's spell pose, the pillager's crossbow.
  • Not-yet-converted mobs still render correctly on the larger layers.
  • In a world: all nine summoned with no errors, and a custom player skin still loads.

🤖 Generated with Claude Code

https://claude.ai/code/session_01R5yMmGQVzFD1XVDyZe42KG

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