Dartboard prototype with working raycast

Scripts/Main.gd

@@ -0,0 +1,61 @@
+extends Node3D
+# Attach to the ROOT node (DartboardProto).
+# Leave `dartboard_root` empty to auto-search, or drag the glb node in.
+
+@export var dartboard_root: Node
+
+var dartboard: MeshInstance3D
+
+func _ready() -> void:
+	dartboard = _find_mesh_instance(dartboard_root if dartboard_root else self)
+	if dartboard == null:
+		push_error("Could not find a MeshInstance3D. Check that the glb is in the scene.")
+		return
+	print("Found dartboard mesh node: ", dartboard.name)
+	_print_surfaces()
+	_ensure_collision()
+
+func _find_mesh_instance(node: Node) -> MeshInstance3D:
+	if node is MeshInstance3D and node.mesh != null:
+		return node
+	for child in node.get_children():
+		var found := _find_mesh_instance(child)
+		if found:
+			return found
+	return null
+
+func _print_surfaces() -> void:
+	var mesh := dartboard.mesh
+	print("=== Dartboard surfaces ===")
+	for i in mesh.get_surface_count():
+		var mat := mesh.surface_get_material(i)
+		var mat_name := mat.resource_name if mat else "(no material)"
+		print("Surface ", i, "  material name: '", mat_name, "'")
+	print("==========================")
+	var aabb := dartboard.get_aabb()
+	print("Board local size (x,y,z): ", aabb.size)
+
+# CHEAP collision: one box that matches the board's bounding box.
+# This replaces create_trimesh_collision(), which was making it run at ~3 FPS
+# because it built a collision triangle for every face of the board.
+func _ensure_collision() -> void:
+	# Remove any existing auto-added body so we don't stack shapes on re-runs.
+	for child in dartboard.get_children():
+		if child is StaticBody3D and child.name == "AutoBoardBody":
+			child.queue_free()
+
+	var body := StaticBody3D.new()
+	body.name = "AutoBoardBody"
+
+	var col := CollisionShape3D.new()
+	var box := BoxShape3D.new()
+	# Match the mesh's bounding box. Use the AABB size directly as the box size.
+	var aabb := dartboard.get_aabb()
+	box.size = aabb.size
+	col.shape = box
+	# Center the box on the mesh's bounding-box center (not always the origin).
+	col.position = aabb.position + aabb.size * 0.5
+
+	body.add_child(col)
+	dartboard.add_child(body)
+	print("Created cheap box collision for the dartboard.")