MTLLayeredBuffer

A package encapsulating MTLLayeredBuffer from ARHeadsetKit. This type is not included in ARHeadsetUtil since it is distinct from the other utilities. For more about it, refer to its article in the ARHeadsetKit article series.

Example of usage

import MTLLayeredBufferModule

enum LiDARScanLayer: UInt16, MTLBufferLayer {
    case pointCloud
    case pointIDs
    
    static let bufferLabel = "LiDAR Scan Buffer"
    
    func getSize(capacity: Int) -> Int {
        switch self {
        case .pointCloud:
            return capacity * MemoryLayout<SIMD3<Float>>.stride
        case .pointIDs:
            return capacity * MemoryLayout<UInt64>.stride
        }
    }
}

let device: MTLDevice = ...
let numElements: Int = ...

var buffer: MTLLayeredBuffer<LiDARScanLayer> // options = .storageModePrivate by default
buffer = device.makeLayeredBuffer(capacity: numElements, options: .storageModeShared)

let pointCloud = buffer[.pointCloud].assumingMemoryBound(to: SIMD3<Float>.self)
let pointIDs   = buffer[.pointIDs].assumingMemoryBound(to: UInt64.self)

for i in 0..<numElements {
    pointCloud[i] = ...
    pointIDs[i] = ...
}