private void HandleMouseWheel(object sender, MouseWheelEventArgs e) { if (e.Delta > 0) { camMain.Position = Point3D.Add(camMain.Position, (Vector3D)(camMain.LookDirection * 10.0)); } else { camMain.Position = Point3D.Subtract(camMain.Position, (Vector3D)(camMain.LookDirection * 10.0)); } }