J1: the cliff tunnel (seam, six propped stretches, dark, lights), travel Valley <-> Cove through the sea cave, a save file per worldlet; New World has no Where (--dev-worldlets to try others)

scripts/world/tunnel_face.gd

@@ -0,0 +1,44 @@
+extends StaticBody3D
+## A rock face to dig through (J1): the seam on the clifftop, or the end of
+## the tunnel dug so far. It answers the same questions a boulder does
+## (Actions.harvest_hit), so a swing of the pick works on it, but the tunnel
+## (tunnel.gd) owns the rules: which pick, whether it's propped, and what
+## happens when it gives.
+
+var tunnel: Node3D
+var stage := 0                  ## 0 = the seam; k = the face at the start of stretch k
+var uid := ""
+var tool_kind := "pickaxe"
+var min_tier := 3               ## the antler pickaxe
+var max_hp := 45.0
+var hp := 45.0
+var depleted := false
+var kind := "rock"
+var chip_color := Color(0.42, 0.40, 0.38)
+
+func display_name() -> String:
+	return "Cracked seam" if stage == 0 else "Rock face"
+
+## Why the next blow won't land ("" = it will), before the tool check.
+func refusal() -> String:
+	return tunnel.dig_refusal(stage)
+
+func interact_prompt(_player: Node) -> String:
+	var why := refusal()
+	var left := ceili(hp / 3.0)
+	if not why.is_empty():
+		return "%s: %s" % [display_name(), why]
+	return "%s: [LMB] dig with the antler pickaxe (about %d blows left)" % [display_name(), left]
+
+func interact(player: Node) -> void:
+	Actions.tell(player, interact_prompt(player))
+
+## One blow (from Actions.harvest_hit). Returns what it knocks loose.
+func hit(damage: float, _at: Vector3, _from: Vector3) -> Dictionary:
+	hp = maxf(hp - damage, 0.0)
+	tunnel.face_hit(self)
+	if hp <= 0.0 and not depleted:
+		depleted = true
+		tunnel.face_broken(self)
+		return {"stone": 3}
+	return {"stone": 1} if randf() < 0.4 else {}