I've watched this issue for a long time but it seems this hasn't been fixed yet. My use case is to assign a UIView to the 'contents' variable of SCNMaterialProperty. It works without problem in terms of rendering, but when I assign 'nil' to the variable the allocated memory of IOSurface by SceneKit does not being destroyed I've searched about this and many other developers have been suffered by this issue. I did a 'Game Memory' profiling of my toy example and the allocated memory (134MB) by SceneKit hadn't been released after I've assigned nil. I'm sure I released every relavant UIViews and view controllers used for the 'contents'.

Dear Apple Team and everyone who has experience with MapKit. I am building an app where I need to hide some 3D models and replace them with my custom 3D meshes using SceneKit. Up until now I was using Mapbox it allows to get mesh row data to reconstruct all maps 3D. Is there something like this possible with MapKit? Use cases Say you navigated to Kennedy Space Center Launch Complex 39 and there is no 3D model of actual building. I would like to be able to hide simple massing and replace it with my model. In 3D Satellite VIew some areas have detailed meshes. Say London The Queen's Walk. I would like to make specific area flat so I can place my 3D model on top of Satellite 3D View to illustrate new structure or building. Last one. Is it possible to change existing buildings colours? I know it is possible transparency Thank you @apple

Hello, I've got a question about the Xcode Scene Editor. That is the SceneKit one NOT SpriteKit. According to this documentation: https://developer.apple.com/documentation/scenekit/scnnode/2873004-entity the entity property of a node serialised via the Xcode's scene editor can be set. While the Xcode's SpriteKit Scene Editor has this option I cannot find anything similar in the SceneKit editor. So my question is do *.scn files produced from Xcode contain GameplayKit information such as a GKEntity graph or only SCNNode data? Do I have to parse the scene and programatically create GKEntities? If that is the case there must be an error in the documentation. Thank you!

Is it possible to use SceneKit nodes within RoomCaptureView or RoomCaptureSession? If so, then how can I add a 3D object while the scanning process is going on? Will it be possible to add that 3D object to the final 3D captured room?

I am writing to seek assistance with a challenge I am facing while working on a 3D model rendering project. I believe your expertise in this area could be immensely helpful in resolving the issue. The problem I am encountering involves difficulties in displaying textures on both parent and child nodes within the 3D model. Here are the key details of the problem: This model contents wall_grp(doors, windows and wall) objects. We are using roomplan data in SCNView. This code dependent on scene kit and room plan apis When we are comment childnode code its working but in this case we don’t have windows and door on wall. func updateWallObjects() { if arch_grp.count > 0 { if !arch_grp.isEmpty { for obj in arch_grp[0].childNodes { let color = UIColor.init(red: 255/255, green: 229/255, blue: 204/255, alpha: 1.0) let parentNode = obj.flattenedClone() for childObj in obj.childNodes { let childNode = childObj.flattenedClone() let childMaterial = SCNMaterial() childNode.geometry?.materials = [childMaterial] if let name = childObj.name { if (removeNumbers(from: name) != "Wall") { childNode.geometry?.firstMaterial?.diffuse.contents = UIColor.white } else { childNode.geometry?.firstMaterial?.diffuse.contents = color } } childObj.removeFromParentNode() parentNode.addChildNode(childObj) } let material = SCNMaterial() parentNode.geometry?.materials = [material] parentNode.geometry?.firstMaterial?.diffuse.contents = color obj.removeFromParentNode() arch_grp[0].addChildNode(parentNode) } } } }``` Please suggest us

How can i draw a CapturedRoom.Surface.Curve in Scenekit? Is there a way by using an UIBezierPath or by splitting it up into segments?

We are attempting to update the texture on a node. The code below works correctly when we use a color, but it encounters issues when we attempt to use an image. The image is available in the bundle, and it image correctly in other parts of our application. This texture is being applied to both the floor and the wall. Please assist us with this issue." for obj in Floor_grp[0].childNodes { let node = obj.flattenedClone() node.transform = obj.transform let imageMaterial = SCNMaterial() node.geometry?.materials = [imageMaterial] node.geometry?.firstMaterial?.diffuse.contents = UIColor.brown obj.removeFromParentNode() Floor_grp[0].addChildNode(node) }

SceneKit has started filling my console with this log message: "Pass FloorPass is not linked to the rendering graph and will be ignored check it's input/output" Feels like I'm the only one on the planet using SceneKit, but if anyone can guess at what is happening, or the reason for this - I'm thankful.

I am using Xcode 14.3 and when Issue that says "Could not find bundle inside /Library/Developer/CommandLineTools under scntool". I searched this up and tried reinstalling CommandLineTools, reinstalling xcode, and reseting xcode. Here are screenshots of the issue: https://docs.google.com/document/d/1H6HsoZoJhISMo-5cXG-kN0hat6jftcujL1iYK2TRkeA/edit And here is the code: https://github.com/EnderRobber101/Xcode Is there a solution? Please inform me of the solution. Thank you for reading.

I've got the following code to generate an MDLMaterial from my own material data model: public extension MaterialModel { var mdlMaterial: MDLMaterial { let f = MDLPhysicallyPlausibleScatteringFunction() f.metallic.floatValue = metallic f.baseColor.color = CGColor(red: CGFloat(color.x), green: CGFloat(color.y), blue: CGFloat(color.z), alpha: 1.0) f.roughness.floatValue = roughness return MDLMaterial(name: name, scatteringFunction: f) } } When exporting to OBJ, I get the expected material properties: # Apple ModelI/O MTL File: testExport.mtl newmtl material_1 Kd 0.163277 0.0344635 0.229603 Ka 0 0 0 Ks 0 ao 0 subsurface 0 metallic 0 specularTint 0 roughness 0 anisotropicRotation 0 sheen 0.05 sheenTint 0 clearCoat 0 clearCoatGloss 0 newmtl material_2 Kd 0.814449 0.227477 0.124541 Ka 0 0 0 Ks 0 ao 0 subsurface 0 metallic 0 specularTint 0 roughness 1 anisotropicRotation 0 sheen 0.05 sheenTint 0 clearCoat 0 clearCoatGloss 0 However when exporting USD I just get: #usda 1.0 ( defaultPrim = "_0" endTimeCode = 0 startTimeCode = 0 timeCodesPerSecond = 60 upAxis = "Y" ) def Xform "Obj0" { def Mesh "_" { uniform bool doubleSided = 0 float3[] extent = [(896, 896, 896), (1152, 1152, 1148.3729)] int[] faceVertexCounts = ... int[] faceVertexIndices = ... point3f[] points = ... } def Mesh "_0" { uniform bool doubleSided = 0 float3[] extent = [(898.3113, 896.921, 1014.4961), (1082.166, 1146.7178, 1152)] int[] faceVertexCounts = ... int[] faceVertexIndices = ... point3f[] points = ... matrix4d xformOp:transform = ( (1, 0, 0, 0), (0, 1, 0, 0), (0, 0, 1, 0), (0, 0, 0, 1) ) uniform token[] xformOpOrder = ["xformOp:transform"] } } There aren't any material properties. FWIW, this specifies a set of common material parameters for USD: https://openusd.org/release/spec_usdpreviewsurface.html (Note: there is no tag for ModelIO, so using SceneKit, etc.)

Xcode template "iOS game swift SceneKit" run with error as shown. It might be related to scntool. Any idea how to fix this?

I used ObjectCaptureView with an ObjectCaptureSession in different setups, for example nested in an UIViewController so that I was able to deallocate the View and the Session after switching to another View. If I am going to use an ARSession with ARWorldTracking and SceneUnderstanding afterwards and the app won't show the overlaying Mesh anymore. Using SceneUnderstanding without opening the ObjectCaptureView previously works fine. Has someone faced the same issue, or how could I report this to apple? Seems like a problem with the ObjectCaptureView/Session itself. During the start of the ObjectCaptureSession the are also some logs in the Metadata telling me: "Wasn't able to pop ARFrame and Cameraframe at the same time", it will be shown like 10 or 15 times for every start. So I nested it in an ARSCNView but that didn't fixed it.

Hi there, i have recently started development in swift Ui. I wanted to ask whether it is possible to design an AR app which generates and tracks a 3d model or .scn based on a real world 3d model if .usdz format is used. for example i want to generate and track the movement of an aeroplane in AR and i have .scn file but i want a real world object as an anchor like a pen or pencil and i want to use its 3d data in .usdz format. i know you can use ARobjects abnd object tracking but it uses .arobject format and doesnot use LiDAR. important thing is that i want to use Lidar tracking not point cloud. is it possible? point me in right direction Thank you. I am using xcode 15 & ios 17 beta

Hi, my app displays a video as texture on SceneKit's SCNNode. Now I've just found that some videos looks different in iOS 16.4 from previous versions. The videos look more pale than they should be. I looked up some documents and set SCNDisableLinearSpaceRendering as true in info.plist, they look exactly what they should be but then the problem is that the other videos which already looked fine now turned different. But anyway it seems to relate to the linear or gamma color spaces regarding to this answer (https://developer.apple.com/forums/thread/710643). Definitely those problematic videos have some different color space setting or something. I am not really expert in these field, where should I start to dig in? Or how can I just make iOS 16.4 behave same as previous versions? It worked well for all the videos then. What was actually updated?

I'm not sure which combination of iOS/XCode/Mac OS is causing this issue, but all of a sudden when I try to run our SceneKit app and the "Scheme -> Diagnostics -> Metal -> API Validation" setting is turned off the scene won't render and the console is just full of the following errors: Execution of the command buffer was aborted due to an error during execution. Invalid Resource (00000009:kIOGPUCommandBufferCallbackErrorInvalidResource) [SceneKit] Error: Main command buffer execution failed with status 5, error: Error Domain=MTLCommandBufferErrorDomain Code=9 "Invalid Resource (00000009:kIOGPUCommandBufferCallbackErrorInvalidResource)"  ) If you run the app outside of xcode it's fine, also enabling the "API Validation" option stops the issue. One of my schemes has this option disabled since the project began and never had an issue before. Just throwing this out there incase someone else has spent hours of their life trying to figure out why this is not working for them. Also you can just create a new SceneKit project and turn that diagnostic option off and the app won't render anything.

Hi guys, I need to find a way to extract height information form MapKit and rebuild selected map area in 3D using SceneKit or RealityKit. Constructing a mesh is not a problem. But I can't seem to find a way to extract bitmap and height information from MapKit? I can do it with MapBox but really wanted to avoid using it. Any ideas?

Hello!I have been using this piece of code in order to create a custom plane geometry using the SCNGeometryPrimitiveType option ".polygon".extension SCNGeometry { static func polygonPlane(vertices: [SCNVector3]) -> SCNGeometry { var indices: [Int32] = [Int32(vertices.count)] var index: Int32 = 0 for _ in vertices { indices.append(index) index += 1 } let vertexSource = SCNGeometrySource(vertices: vertices) let indexData = Data(bytes: indices, count: indices.count * MemoryLayout.size) let element = SCNGeometryElement(data: indexData, primitiveType: .polygon, primitiveCount: 1, bytesPerIndex: MemoryLayout.size) let geometry = SCNGeometry(sources: [vertexSource], elements: [element]) let material = SCNMaterial() material.diffuse.contents = UIColor.blue material.isDoubleSided = true geometry.firstMaterial = material return geometry } }This works by sending in vertex coordinates in an order which represent the outline of the desired plane. As an example I might make an array with vertices representing a rectangle geometry as follows: [lowerLeft, upperLeft, upperRight, lowerRight].This method seems to work well for simpler shapes, but I sometimes get an error which I haven't been able to find the cause of when using more complex shapes or vertex coordinates which are randomly scattered in a plane (eg. when the method recieves an array where the vertices order is not outlining a shape. In the rectangle case it could look like this: [lowerLeft, upperRight, lowerRight, upperLeft] ). The error seems more likely to occur when the number of vertices used increases.I'm using this method to allow the user of my app to "paint" an outline of the desired plane, and as I can't control how the user chooses to do so I want this method to be able to handle those cases as well.This is the error print i recieve after calling this method:-[MTLDebugDevice validateNewBufferArgs:options:]:467: failed assertion `Cannot create buffer of zero length.'(lldb)And this is what appears in the debug navigator:libsystem_kernel.dylib`__pthread_kill: 0x219cad0c4 <+0>: mov x16, #0x148 0x219cad0c8 <+4>: svc #0x80 -> 0x219cad0cc <+8>: b.lo 0x219cad0e4 ; <+32> 0x219cad0d0 <+12>: stp x29, x30, [sp, #-0x10]! 0x219cad0d4 <+16>: mov x29, sp 0x219cad0d8 <+20>: bl 0x219ca25d4 ; cerror_nocancel 0x219cad0dc <+24>: mov sp, x29 0x219cad0e0 <+28>: ldp x29, x30, [sp], #0x10 0x219cad0e4 <+32>: ret Where line 4 has the error: com.apple.scenekit.scnview-renderer (16): signal SIGABRTAny help or explanation for this error would be greatly appriciated!

is any one else having issues with game scene-view .dae and or .scn files it seems these new beta release is very incompatible with files that work perfect with previous Xcode releases up to Xcode 14 I'm working on upgrading a simple striped down version of my chess game and run in to strange and bogus errors messages and crashes /Users/helmut/Desktop/schachGame8423/schach2023/scntool:1:1 failed to convert file with failure reason: *** -[__NSPlaceholderDictionary initWithObjects:forKeys:count:]: attempt to insert nil object from objects[0] all tools reality converter exporting the .dae file to other graphic files working fine as in prior Xcode releases but some thing is missing in current beta release of Xcode 15