The following code runs fine when compiled with Swift 5, but crashes when compiled with Swift 6 (stack trace below). In the draw method, commenting out the addCompletedHandler line fixes the problem. I'm testing on iOS 18.0 and see the…
I have a scene containing SCNNode models, and a camera. I'd like to generate a depth map render of my scene (from perspective of camera) - something like this: How can this be achieved? Currently looking into SCNTechnique but haven't…
My metal default library does not contain the vertex and shader functions from the .metal file of the same directory. Then the library.makeFunction(name: ..) returns nil for both the vertex and shader functions that should be assigned to pipelineDescriptor vars.…
So for our maps, we are using MapKit. We overlay a layer using MKPolygons above the map. This feature has been working since iOS15 but since 16.1 we get the following error and the app freezes (does not crash). [VKDefault]…
I’m using Metal with Swift to build a 3D viewer for iOS and I have some issues to make the depth working. From now, I can draw and render a single shape correctly in 3D (like a simple square plane…
On Macs with discrete graphics cards, Managed buffers should be used instead of Shared Buffers, however there are additional requirements to maintain synchronisation using [MTLBuffer:didModifyRange:]. However on Apple Silicon, if I force the use of Managed buffers by pretending [MTLDevice…
I am trying to use Metal Performance Shaders with Core Image. Unfortunately, the filter code is in Objective C and I am using the bridge to make it work with the Swift project. My-Project-Bridging-Header.h #import "MyCustomFilter.h" MyCustomFilter.h #import <CoreImage/CoreImage.h> @interface…
While using Apple's texture importer, or my own, a white soft-edged circle drawn in software (with a transparent bg) or in Photoshop (saved as a PNG) when rendered will have its semi-transparent colors replaced with black when brought into Metal.…