T2 tutorial: all five chapters with Old Tam, scripted dusk and demo wolf, rabbits for the hunt, title-screen Tutorial entry, pause-menu skip/leave, goodbye card; full bot playthrough test

scripts/creatures/tutorial_wolf.gd

@@ -0,0 +1,79 @@
+extends "res://scripts/creatures/creature.gd"
+## The tutorial's wolf (docs/TUTORIAL_DESIGN.md §2, step "Wolves"): it comes
+## out of the dark, circles at the edge of the light for a while, and slinks
+## off. It never attacks. When it's gone, `gone` fires and the step ticks.
+
+signal gone
+
+const RING := 11.0
+const CIRCLE_SECONDS := 18.0
+const LEAVE_AFTER := 40.0        ## this far from you it's gone
+
+var target: Node3D
+var _a := 0.0
+var _goal_d := 0.0
+var _done := false
+
+func begin(t: Node3D) -> void:
+	target = t
+	var away: Vector3 = global_position - t.global_position
+	_a = atan2(away.z, away.x)
+	state = "stalk"
+	_state_t = CIRCLE_SECONDS
+
+func display_name() -> String:
+	return "Wolf"
+
+func interact_prompt(_p: Node) -> String:
+	return "Wolf (watching you from the dark)"
+
+func _pick_target() -> Node3D:
+	return target
+
+func _think(dt: float) -> void:
+	if target == null or not is_instance_valid(target):
+		_leave()
+		return
+	_state_t -= dt
+	var tp: Vector3 = target.global_position
+	match state:
+		"stalk":
+			_a += dt * 0.35
+			_go_to(tp + Vector3(cos(_a), 0, sin(_a)) * RING)
+			if _state_t <= 0.0:
+				state = "flee"
+				_state_t = 15.0
+		"flee":
+			var away := global_position - tp
+			away.y = 0.0
+			steer(atan2(-away.x, -away.z))
+			_goal_d = 99.0
+			if global_position.distance_to(tp) > LEAVE_AFTER or _state_t <= 0.0:
+				_leave()
+		_:
+			state = "stalk"
+
+func _go_to(p: Vector3) -> void:
+	var to := p - global_position
+	to.y = 0.0
+	if to.length() > 0.3:
+		steer(atan2(-to.x, -to.z))
+	_goal_d = to.length()
+
+func _desired_speed() -> float:
+	match state:
+		"stalk": return 0.0 if _goal_d < 1.0 else (3.0 if _goal_d < 6.0 else 6.5)
+		"flee": return 7.5
+	return 0.0
+
+func _leave() -> void:
+	if _done:
+		return
+	_done = true
+	gone.emit()
+	queue_free()
+
+## (A swipe makes it run.)
+func _react(_from: Vector3) -> void:
+	state = "flee"
+	_state_t = 10.0