The unit vector SceneKit treats as "forward" in local space for all nodes.
- iOS 11.0+
- macOS 10.13+
- Mac Catalyst 13.0+
- tvOS 11.0+
- watchOS 4.0+
The "forward" direction of a node affects cameras and directional lighting attached to a node, as well as relative orientation and movement effects such as
This vector is always
(0, 0, -1) for all nodes, but you can use this class property when it's convenient to refer to directions symbolically.