private void OnTouch(object sender, TouchTracking.TouchActionEventArgs args) { if (args.Type == TouchTracking.TouchActionType.Pressed) { var x = args.Location.X * _density; var y = args.Location.Y * _density; var ppi = new PointParticleInitializer(new Window(Height, Width), new Vector2((float)x, (float)y)); var emitter = new Emitter <SKParticle2D>(ppi, 100) { //AvgLife = 5, Forces = new List <IApplyForce>() { new Gravity() } }; _renderer.AddEmitter(emitter); } }