void HandleTapGesture(UITapGestureRecognizer sender) { SCNView areaPanned = sender.View as SCNView; CGPoint point = sender.LocationInView(areaPanned); SCNHitTestResult[] hitResults = areaPanned.HitTest(point, new SCNHitTestOptions()); SCNHitTestResult hit = hitResults.FirstOrDefault(); if (hit != null) { SCNNode node = hit.Node; if (node != null) { if (!isAnimating) { node.AddRotationAction(SCNActionTimingMode.Linear, 3, true); isAnimating = true; } else { node.RemoveAction("rotation"); isAnimating = false; } } } }