The scene coordinate system is locked to match the orientation of the camera.
- iOS 11.0+
Camera alignment defines a coordinate system based on the native sensor orientation of the device camera. Relative to a
AVCapture-oriented camera image, the x-axis points to the right, the y-axis points up, and the z-axis points out the front of the device (toward the user).
When this alignment is active, ARKit performs no device motion tracking. That is, world-space positions are effectively always relative to the current position and orientation of the device. (For example, a SceneKit object placed in an
ARSCNView will thus maintain the same position on screen, even as the camera image changes while the device moves.)