SceneKit- Cannot query using bitmask

Question

We were able to have custom raycasting using bitmasks:

let hitTest = sceneView.hitTest(location, options: [categoryBitMask: bitmask])

But hitTest is deprecated now and I can't figure out how to set bitmask for raycast query:

let query = sceneView.raycastQuery(from: location, allowing: .estimatedPlane, alignment: .horizontal)

Pinwork

Answer 1

SceneKit

In SceneKit you can use bitmasks in context of [SCNHitTestResult]. hitTest(_:options:) instance method is not deprecated yet and it works in iOS 15.4.

let sceneView = ARSCNView(frame: .zero)

enum HitTestType: Int {
    case object_A = 0b00000001
    case object_B = 0b00000010
}

let point: CGPoint = gesture.location(in: self.sceneView)

let bitMask = HitTestType.object_A.rawValue | HitTestType.object_B.rawValue

let results = sceneView.hitTest(point, options: [.categoryBitMask: bitMask])

P.S.

Only hitTest(_:types:) is deprecated at the moment.

RealityKit

In RealityKit you can use bitmasks in CollisionCastHit's context:

let arView = ARView(frame: .zero)

let point: CGPoint = gesture.location(in: self.arView)
    
let (origin, direction) = arView.ray(through: point)!
    
let raycasts: [CollisionCastHit] = arView.scene.raycast(origin: origin, 
                                                     direction: direction, 
                                                        length: 50, 
                                                         query: .any, 
                                                          mask: .default, 
                                                    relativeTo: nil)

...or this way:

let raycasts: [CollisionCastHit]  = arView.hitTest(point, 
                                                   query: .any, 
                                                    mask: .default)

Dennie

Thanks @Andy but I think you are using RealityKit, SCNScene not contains "raycast" method. – Pinwork

You are right, I got it wrong with: "func hitTest(_ point: CGPoint, types: ARHitTestResult.ResultType) -> [ARHitTestResult]" – Pinwork