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How is it possible to implement a vertical plane detection (i.e. for walls)?
let configuration = ARWorldTrackingSessionConfiguration()
configuration.planeDetection = .horizontal //TODO
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Overview. On a fourth-generation iPad Pro running iPad OS 13.4 or later, ARKit uses the LiDAR Scanner to create a polygonal model of the physical environment.
ARKit recognizes notable features in the scene image, tracks differences in the positions of those features across video frames, and compares that information with motion sensing data. The result is a high-precision model of the device's position and motion.
An object that specifies the position and orientation of an item in the physical environment.
Edit: This is now supported as of ARKit 1.5 (iOS 11.3). Simply use .vertical. I have kept the previous post below for historical purposes.
Vertical plane detection is not (yet) a feature that exists in ARKit. The .horizontal suggests that this feature could be being worked on and might be added in the future. If it was just a Boolean value, this would suggest that it is final.
This suspicion was confirmed by a conversation that I had with an Apple engineer at WWDC17.
You could argue that creating an implementation for this would be difficult as there are infinitely many more orientations for a vertical plane rather than a horizontal one, but as rodamn said, this is probably not the case.
From rodamn’s comment:
At its simplest, a plane is defined to be three coplanar points. You have a surface candidate once there are sufficient detected coplanar features detected along a surface (vertical, horizontal, or at any arbitrary angle). It's just that the normal for horizontals will be along the up/down axis, while vertical's normals will be parallel to the ground plane. The challenge is that unadorned drywall tends to generate few visual features, and plain walls may often go undetected. I strongly suspect that this is why the .vertical feature is not yet released.
However, there is a counter argument to this. See comments from rickster for more information.
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Support for this is coming with iOS 11.3:
static var vertical: ARWorldTrackingConfiguration.PlaneDetectionThe session detects surfaces that are parallel to gravity (regardless of other orientation).
https://developer.apple.com/documentation/arkit/arworldtrackingconfiguration.planedetection https://developer.apple.com/documentation/arkit/arworldtrackingconfiguration.planedetection/2867271-vertical
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