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While translating the Accelerating Ray Tracing Using Metal sample project into Swift, I have run into an issue within the createAccelerationStructures function. I am trying to fill in the first three rows of the instance transformation matrix. In the Objective C example, it looks like: for (int column = 0; column < 4; column++) tfor (int row = 0; row < 3; row++) ttinstanceDescriptors[instanceIndex].transformationMatrix.columns[column][row] = instance.transform.columns[column][row]; The matrix targeted is a MTLPackedFloat4x3. It has defied me pulling out the needed elements from my instance transform and placing them in the descriptor. I have tried the obvious: for column in 0..<( 4 ) t{ tfor row in 0..<( 3 ) tt{ ttanInstanceDescriptorPointer.pointee.transformationMatrix.columns[column][row] = aNodeInstance.transform.columns[column][row] tt} t} I have tried more obscure ideas related to simd matrices and Swift. The compiler err

I have created the .json file according to the https://developer.apple.com/documentation/createml/building-an-object-detector-data-source here is my .json file below { imagefilename:Five Fingers.HEIC, annotation: [ { coordinates: { y: 156.062, x: 195.122, height: 148.872, width: 148.03 }, label: Five Fingers } ] }, { imagefilename: One Finger.HEIC, annotation: [ { coordinates: { y: 156.062, x: 195.122, height: 148.872, width: 148.03 }, label: One Finger } ] }, { imagefilename: Two Finger.HEIC, annotation: [ { coordinates: { y: 156.062, x: 195.122, height: 148.872, width: 148.03 }, label: Two Finger } ] }, { imagefilename: Four Finger.HEIC, annotation: [ { coordinates: { y: 156.062, x: 195.122, height: 148.872, width: 148.03 }, label: Four Finger } ] } ] but it shows error as Missing required column 'label' in json. at NameOfJsonFile.json Were am I Wrong

Good day! Question How can we implement pinch gesture in SwiftUI and solve the gesture limitation from MagnificationGesture Description I'm trying to implement a pinch gesture recognizer on a scrollable LazyVGrid in a SwiftUI-based application, however the pinch gesture has usually been intercepted by the scroll gesture and makes it significantly harder to trigger than using UIKit's UIPinchGestureRecognizer. Here're my findings after a few tests. MagnificationGesture: can detect the pinch gesture when two fingers are dragging at the same time. UIPinchGestureRecognizer: can detect the pinch gesture when two fingers are touching and at least one finger is dragging. Cases tried ScrollView + LazyVGrid + MagnificationGesture Result: difficult to trigger as described ScrollView { LazyVGrid(columns: Array(repeating: GridItem(.flexible()), count: 3)) { ForEach(aryItems) { item in Text(item.photoId) .border(Color.black, width: 1) } } } .highPriorityGesture(MagnificationGesture() .onChanged { value in print(te

I'm playing around with the new navigation API's offered in ipadOS16/macOS13, but having some trouble working out how to combine NavigationSplitView, NavigationStack and NavigationLink together on macOS 13 (Testing on a Macbook Pro M1). The same code does work properly on ipadOS. I'm using a two-column NavigationSplitView. Within the 'detail' section I have a list of SampleModel1 instances wrapped in a NavigationStack. On the List I've applied navigationDestination's for both SampleModel1 and SampleModel2 instances. When I select a SampleModel1 instance from the list, I navigate to a detailed view that itself contains a list of SampleModel2 instances. My intention is to navigate further into the NavigationStack when clicking on one of the SampleModel2 instances but unfortunately this doesn't seem to work. The SampleModel2 instances are selectable but no navigation is happening. When I remove the NavigationSplitView completely, and only use the NavigationStack the problem does not arise, and i can suc

Greetings, I'm just learning Swift language by Playgrounds and some Udemy educations. I have a problem with Coding 2 - Connect and Solve episode. I supposed to build 3 - 2 - 3 blocks to three spots on 2nd column BUT blocks are acting like ghosting, it appears like for 0.5 seconds and disappear again. Then only change that I made is updating MacOS system with the lastest patch. Open to any ideas about the issue. Tnank you!

I have a LazyVGrid, every item with is favorite button. and use combine to debounce user input($isFavoriteI), when isFavoriteO changed, then modify the items. it works fine, but when i scroll the list, log will print: X, isFavorite changed as false/true), what cause isFavoriteO changed and why? because of item reusing in list? how to avoid it? index 7, isFavorite changed as true index 7, isFavorite changed as true index 7, isFavorite changed as true index 7, isFavorite changed as true index 7, isFavorite changed as true index 7, isFavorite changed as true index 7, isFavorite changed as true index 7, isFavorite changed as true import SwiftUI import Combine struct Item { var index: Int var favorite: Bool } var items = [ Item(index: 0, favorite: true), Item(index: 1, favorite: false), Item(index: 2, favorite: true), Item(index: 3, favorite: false), Item(index: 4, favorite: true), Item(index: 5, favorite: false), Item(index: 6, favorite: true), Item(index: 7, favorite: false), // Item(index: 8, favorite: true), /

I have a custom Instrument with a os-signpost-interval-schema that captures a state string. I would like the final plot value to be : , but I don't know how to get the duration into the string. My working schema is the following, which just stores the state itself in the column: state-interval State Interval ... ... state ?state state State string ?state I would like to change the expression in the column to (str-cat ?state : ?duration), but that fails with: Variable '?duration' must appear in a pattern element to be used in a later expression. I don't see any way to compute this later in the graph, lane, or plot. I've also tried explicitly creating a , but that doesn't seem to change anything. The rest of the pieces include the table: state-table state-interval And the lane, which I would like to display as : rather than just the duration: State state-table state

I'm trying to reproduce in a way the finder column view, but I'm facing an issue. A scroll conflict occurs when I put a ScrollView or a List inside another ScrollView. The horizontal scroll is lagging when the cursor is over the nested ScrollView. Here is my simplified code: struct SplitView: View { var body: some View { ScrollView(.horizontal, showsIndicators: false){ HSplitView{ ScrollView(showsIndicators: false) { VStack(alignment: .leading) { ForEach(0..<100) { Text(Row ($0)) } }.frame(minWidth: 200, alignment: .leading) } ScrollView { VStack(alignment: .leading) { ForEach(0..<100) { Text(Row ($0)) } }.frame(minWidth: 200, alignment: .leading) } ScrollView { VStack(alignment: .leading) { ForEach(0..<100) { Text(Row ($0)) } }.frame(minWidth: 200, alignment: .leading) } } } } } I have the same issue with nested List. Do you have any idea how I can prevent that? Or any workaround?