Watching https://developer.apple.com/wwdc20/10644 Using Swift on AWS Lambda with Xcode. When I call http://127.0.0.1:7000/invoke I get Status: 405 Method Not Allowed? in the browser. And my breakpoint does not hit, no message in Xcode either. Did anyone get this to work?

Hi, I'm trying to convert my SceneKit code into pure Metal/MetalKit and I feel confused about this code and how I should rewrite it. I've made the code simple for this case with some pseudocode. The part where it says "SceneKit magic" is where I feel lost. The SCNNode is just an empty placeholder just as it is – and it works for the calculations it is doing inside. Any help and pointers are much appreciated :-) class Scene { let ball = Ball() let scnNode = SCNNode() var quaternionAngleVelocity = float2(0, 0) func update() { // pseudocode, the user press the up key quaternionAngleVelocity.x -= 3 // pseudocode, the user press the down key quaternionAngleVelocity.x += 3 // pseudocode, the user press the left key quaternionAngleVelocity.y -= 3 // pseudocode, the user press the right key quaternionAngleVelocity.y += 3 ... // apply friction quaternionAngleVelocity *= (1 - 0.05) // i.e. decrease with 5% // rotate let newQuaternionAxisX = simd_quatf(angle: quaternionAngleVelocity.x.degreesToRadians, axis: simd_float3(x: 1, y: 0, z: 0)) let newQuaternionAxisY = simd_quatf(angle: quaternionAngleVelocity.y.degreesToRadians, axis: simd_float3(x: 0, y: 1, z: 0)) let finalQuaternion = simd_normalize(newQuaternionAxisX * newQuaternionAxisY) // SceneKit magic…? let matrix4 = SCNMatrix4Mult(scnNode.worldTransform, SCNMatrix4(simd_float4x4(finalQuaternion))) scnNode.transform = matrix4 ball.quaternion = scnNode.simdWorldOrientation } } class Ball { var position: float3 = [0, 0, 0] var rotation: float3 = [0, 0, 0] { didSet { let rotationMatrix = float4x4(rotation: rotation) quaternion = simd_quatf(rotationMatrix) } } var scale: float3 = [1, 1, 1] var forwardVector: float3 { return normalize([sin(rotation.y), 0, cos(rotation.y)]) } var rightVector: float3 { return [forwardVector.z, forwardVector.y, -forwardVector.x] } var upVector: float3 { return [0, forwardVector.z, 0] } var quaternion = simd_quatf() var modelMatrix: float4x4 { let translateMatrix = float4x4(translation: position) // let rotateMatrix = float4x4(rotation: rotation) let rotateMatrix = float4x4(quaternion) let scaleMatrix = float4x4(scaling: scale) return (translateMatrix * rotateMatrix * scaleMatrix) } var worldTransform: float4x4 { return modelMatrix } }

Be aware, there are many errors / non-existing API's etc. in this session. This is yet the worst session I've seen in this years WWDC. Sorry but I have to be honest.

I get Error Domain=kCLErrorDomain Code=1 "(null)" in the Xcode console when a start to update for location. This does not happen in the example app, so I'm wondering what I might have done wrong?

Hi, I want to begin by saying thank you Apple for making the Spatial framework! Please add a million more features ;-) I'm using the following code to make an object "look at" another point, but at a particular rotation the object "flips" its rotations. See a video here: https://www.dropbox.com/s/5irxt0gxou4c2j6/QuaternionFlip.mov?dl=0 I shake the mouse cursor when it happens to make it obvious to you. import Spatial let lookAtRotation = Rotation3D(eye: Point3D(position), target: Point3D(x: 0, y: 0, z: 0), up: Vector3D(x: 0, y: 1, z: 0)) myObj.quaternion = lookAtRotation.quaternion So my question is why is this happening, and how can I fix it? thx