SCNCameraProjectionDirection.vertical
The camera’s field of view or orthographic scale are measured vertically.
Declaration
case verticalDiscussion
If a camera’s projectionDirection property has this value:
The fieldOfView property measures the vertical viewing angle, and SceneKit automatically calculates the horizontal angle according to the aspect ratio of the view presenting the scene.
Or, if the camera uses an orthographic projection, the orthographicScale property measures the vertical scale factor, and SceneKit automatically calculates the horizontal factor according to aspect ratio.