void UpdateModel(ARTrackedImage trackedImage) { int imageId = int.Parse(trackedImage.referenceImage.name); if (imageId == 1 && model == null) { model = Instantiate(modelPrefab); model.transform.localScale = MODEL_BASE_SCALE * modelScale; stepper = model.GetComponent <Stepper>(); } else if (imageId == 5 && stepper != null) { stepper.ClearSteps(); } else if (stepper != null && stepMapping.ContainsKey(imageId)) { stepper.GoToStep(stepMapping[imageId]); } }