A point on a real-world plane (already detected with the
plane option), respecting the plane's estimated size.
- iOS 11.0+
When searching for this result type, ARKit returns a point coplanar with an already detected plane only if that point lies within the area defined by the plane's
extent properties. Those properties (together with the anchor's
transform) define the smallest rectangular area that includes all regions ARKit estimates to be a part of the plane.
However, that rectangular area may contain regions that are not part of the same real-world surface. There may also be parts of the same real-world surface that lie outside the rectangle because ARKit has not yet recognized them as part of the same plane. You can get a more precise estimate of the plane area ARKit has recognized by testing with the
existing type, or extend your hit test to an infinite plane with the
An existing plane search can return any number of results, depending on how many already-detected planes the hit test ray intersects (if any).