Add golden ball interactable set piece to bridge room

- Add golden_ball_walk_target Node2D at position (1400, 550) on the grassy area above the bridge
- Add golden_ball SetPiece with polygon resource for interactable area
- Connect touched signal to _on_golden_ball_touched handler
- When player uses hand cursor, they walk to the target and narration reveals the golden ball
- Use ScriptBuilder.and_then() to chain walk_to_deferred and narrate actions

scenes/kq4_021_bridge_over_stream/golden_ball_polygon.tres

@@ -0,0 +1,8 @@
+[gd_resource type="Resource" script_class="PolygonPointsResource" format=3 uid="uid://c8k3m9xq2w5np"]
+
+[ext_resource type="Script" uid="uid://dtemboas3bi8y" path="res://PolygonPointsResource.gd" id="1_ppr"]
+
+[resource]
+script = ExtResource("1_ppr")
+points = PackedVector2Array(1350, 520, 1450, 520, 1450, 580, 1350, 580)
+metadata/_custom_type_script = "uid://dtemboas3bi8y"

scenes/kq4_021_bridge_over_stream/golden_ball_polygon.tres.uid

@@ -0,0 +1 @@
+uid://c8k3m9xq2w5np

scenes/kq4_021_bridge_over_stream/kq4_021_bridge_over_stream.gd

@@ -27,3 +27,11 @@ func _on_bridge_looked() -> void:
 	start_main_script(ScriptBuilder.init(
 		ScriptBuilder.say(ego, "A sturdy wooden bridge spans the stream. It looks like it could support your weight.")
 	).build(self, "_on_script_complete"))
+
+
+func _on_golden_ball_touched() -> void:
+	start_main_script(ScriptBuilder.init(
+		ScriptBuilder.walk_to_deferred("SceneViewport/background/Graham", "golden_ball_walk_target")
+	).and_then(
+		ScriptBuilder.narrate("You discover a golden ball lying here, gleaming in the sunlight.")
+	).build(self, "_on_script_complete"))

scenes/kq4_021_bridge_over_stream/kq4_021_bridge_over_stream.tscn

@@ -6,6 +6,7 @@
 [ext_resource type="PackedScene" uid="uid://c4vc1wx7k6cw" path="res://TransitionPiece.tscn" id="4_abc"]
 [ext_resource type="Resource" uid="uid://ro84qhodvetr" path="res://scenes/kq4_021_bridge_over_stream/bridge_polygon_0.tres" id="5_bridge"]
 [ext_resource type="Script" uid="uid://bounwnqg34t5k" path="res://SetPiece_.gd" id="6_setpiece"]
+[ext_resource type="Resource" uid="uid://c8k3m9xq2w5np" path="res://scenes/kq4_021_bridge_over_stream/golden_ball_polygon.tres" id="7_golden_ball"]
 
 [sub_resource type="NavigationPolygon" id="NavigationPolygon_ppo6b"]
 vertices = PackedVector2Array(366.85156, 1243.1484, -140.97656, 1182.2422, -76.0625, 588.09375, -30.171875, 216.07031, 1221.4063, 226.97656, 1994.1406, 468.39844, 2011.7969, 1321.9766, 1052.7422, 1419.8672, -76.0625, 588.0781)
@@ -106,6 +107,19 @@ points_resource = ExtResource("5_bridge")
 
 [connection signal="looked" from="bridge" to="." method="_on_bridge_looked"]
 
+[node name="golden_ball_walk_target" type="Node2D" parent="." unique_id=2847561923]
+position = Vector2(1400, 550)
+
+[node name="golden_ball" type="Polygon2D" parent="." groups=["set-piece"]]
+scale = Vector2(0.78, 0.78)
+color = Color(0.5, 0.5, 0.5, 0.25)
+polygon = PackedVector2Array(1350, 520, 1450, 520, 1450, 580, 1350, 580)
+script = ExtResource("6_setpiece")
+label = "Golden Ball"
+points_resource = ExtResource("7_golden_ball")
+
+[connection signal="touched" from="golden_ball" to="." method="_on_golden_ball_touched"]
+
 [editable path="kq4_015_frog_pond"]
 [editable path="kq4_022_gnomes_cottage"]
 [editable path="kq4_027_forest_path"]