Hello With Unity you can import an animation and apply it to any character. For example, I import a walking animation and I can apply it to all my characters. Is there an equivalent with SceneKit? I would like to apply animations by programming without having to import for each character specifically Thanks

I am attempting to take a screenshot of a SCNScene using SCNView's snapshot() function. However, when I take a snapshot the image turns out to be just the background color and does not contain any nodes. let tempScene = try SCNScene(url: SceneUrl!) let tempView = SCNView() tempView.scene = tempScene tempView.frame = CGRect(x: 0, y: 0, width: 1000, height: 1200) let cameraNode = SCNNode() cameraNode.camera = SCNCamera() cameraNode.name = "Camera" tempScene.rootNode.addChildNode(cameraNode) // place the camera cameraNode.position = SCNVector3(x: 0, y: 0, z: 15) let list = tempView.scene!.rootNode.childNodes(passingTest: { (node, stop) -> Bool in if node.childNodes.count == 0 { return true; } else { return false; } }) cameraNode.constraints = [SCNLookAtConstraint(target: list.first)] //add a light to the scene let lightNode1 = SCNNode() lightNode1.light = SCNLight() lightNode1.light!.type = .ambient lightNode1.position = SCNVector3(x: 0, y: 30, z: 30) tempScene.rootNode.addChildNode(lightNode1) tempView.backgroundColor = UIColor.darkGray SCNTransaction.flush() let image = tempView.snapshot() code-block

Hello I am a bit stuck with a silly challenge I set myself : I want to have a node with a simple geometry ( let's say a triangle ) and I want to render those triangles N time with passing in some information per triangle. Let s say an offset to apply at shader time. I understand that may be I should create a sourcegeo and create multiple nodes to reflect that but here the point is to implement some Metal stuff in the renderNode override ( SCNode.rendererDelegate / SCNRenderNodeDelegate ). so I set up some vertex shader like this : vertex VertexOut brush_vertex_main(const VertexIn vertexIn [[stage_in]], constant BrushNodeBuffer& scn_node [[buffer(BufferNode)]], constant BrushInstances *instances [[buffer(BufferBrush)]], uint instanceID [[instance_id]]) { float4 vertexOffset = float4(instances[instanceID].offset.xyz,1.0) + float4(vertexIn.position.xyz,1.0); // float4 vertexOffset = float4(vertexIn.position.xyz,1.0); VertexOut out = { .position = scn_node.modelViewProjectionTransform * vertexOffset, .color = vertexIn.color }; return out; } Did some binding as well to declare a pipelinerenderState like for eg let defLib = wd.device!.makeDefaultLibrary() let vertFunc = defLib?.makeFunction(name: vertexFunctionName) let fragFunc = defLib?.makeFunction(name: fragmentFunctionName) // add geo desc ( geometries should be doing that underhood anyway let vertexDescriptor = MTLVertexDescriptor() // pos (SCNVertexSemanticPosition) vertexDescriptor.attributes[0].format = .float3 vertexDescriptor.attributes[0].bufferIndex = 0 vertexDescriptor.attributes[0].offset = 0 // color ( SCNVertexSemanticColor) vertexDescriptor.attributes[3].format = .float3 vertexDescriptor.attributes[3].bufferIndex = 0 vertexDescriptor.attributes[3].offset = MemoryLayout<simd_float3>.stride vertexDescriptor.layouts[0].stride = MemoryLayout<simd_float3>.stride * 2 let pipelineDescriptor = MTLRenderPipelineDescriptor() pipelineDescriptor.vertexFunction = vertFunc pipelineDescriptor.fragmentFunction = fragFunc pipelineDescriptor.vertexDescriptor = vertexDescriptor did some buffers creation, setting them properly in the rendering loop rendererCmdEnc.setRenderPipelineState(brushRenderPipelineState!) rendererCmdEnc.setVertexBuffer(vertBuff!, offset: 0, index: 0) // node info rendererCmdEnc.setVertexBuffer(nodeBuff! , offset: 0, index: Int(BufferNode.rawValue)) // per instance info rendererCmdEnc.setVertexBuffer(primBuff! , offset: 0, index: Int(BufferBrush.rawValue)) rendererCmdEnc.drawIndexedPrimitives(type: .triangle, indexCount: primitiveIdx.count, indexType: .uint16, indexBuffer: indexBuff!, indexBufferOffset: 0, instanceCount: 6) and I keep banging my head when this executes : I have a miss match between my renderpipelineState vs the RenderPassDescriptor. Either it s the colorAttachment or the sample count/rastersamplecount that is invalid. -[MTLDebugRenderCommandEncoder setRenderPipelineState:]:1604: failed assertion `Set Render Pipeline State Validation For depth attachment, the texture sample count (1) does not match the renderPipelineState rasterSampleCount (4). The color sample count (1) does not match the renderPipelineState's color sample count (4) The raster sample count (1) does not match the renderPipelineState's raster sample count (4) I used the passdescriptor collorattachment to be a close as possible when describing the renderpipelinestate. changed the rastersamplecount. Tried without any specific for collorattachment etc... Alas, either the API validation will tell me I have the wrong colorAttachment info when I set up the renderpipelinestate in the renderloop and if I fixed the colorattach info at renderStatePipeline creation, some invalid sample count. In a nutshell : is there any way to do this kind of geo instancing in a single node using SceneKit ? thanks in advance for any support you would find interesting to provide!

I am writing to report an issue that I have been encountering while developing an iOS game using SceneKit. In my application, I have programmatically added various animations to my scene, which include position, blend shape, and rotation animations. When I attempt to export the scene to a "USD" type file, the export process fails. The error that I receive is as follows: 2 SceneKit 0x1b19d3528 USDKitConverter::processBlendShapeAnimation(USKNode*, CAAnimation*, std::__1::vector<double, std::__1::allocator<double>>&, std::__1::vector<std::__1::vector<float, std::__1::allocator<float>>, std::__1::allocator<std::__1::vector<float, std::__1::allocator<float>>>>&) + 484 Given the nature of the error, I suspect there may be an issue with SceneKit's handling of blend shape animations when converting to USD. As a test, I removed the blend shape animations, keeping only the position animations, and attempted to export again. The export process succeeded, however, when I tried to play the resulting USD file, none of the animations were present. Furthermore, I attempted a workaround by first exporting to an SCN file, which also succeeded. However, when I then tried to open this SCN file with SceneEditor and export it to USD using the application's menu, Xcode crashed. I am reaching out to request assistance in resolving this issue, or if this is indeed a bug, to bring it to your attention for further investigation. Please let me know if you require any additional information from my end.

Hello, does anyone know of any way to learn apple modules such as scene kit, uikit, reality kit etc? I have seen tutorials on the apple and swift playgrounds page but so far I have not found one that refers to these more advanced modules, I have seen the apple documentation but it is not the most optimal to learn by that means, so I wanted to ask if anyone knows means such as a playground or others to learn how to use these advanced modules

After the iOS 17 update, objects rendered in SceneKit that have both a normal map and morph targets do not render correctly. The shading and lighting appear dark and without reflections. Using a normal map without morph targets or having morph targets on an object without using a normal map works fine. However, the combination of using both breaks the rendering. Using diffuse, normal map and a morpher: Diffuse and normal, NO morpher:

I'm trying to create an app similar to PolyCam using Lidar . I'm using SceneKit mesh reconstruction and able to apply some random textures. But need real-world textures in generated output 3D Model. Found few examples available which are related to MetalKit and Point Cloud, which was not helpful. Can you help me out with any references/steps/tutorial to how to achieve it .

Understanding SCNCameraController TLDR; I'm able to create my own subclassed camera controller, but it only works for rotation, not translation. I made a demo repo here. Background I want to use SceneKit's camera controller to drive my scene's camera. The reason I want to subclass it is that my camera is on a rig where I apply rotation to the rig and translation to the camera. I do that because I animate the camera, and applying both translation and rotation to the camera node doesn't create the animation I want. Setting up Instantiate my own SCNCameraController Set its pointofView to my scene's pointOfView (or its parent node I guess) Using the camera controller We now want the new camera controller to drive the scene. When interactions begin (e.g. mouseDown), call beginInteraction(_ location: CGPoint, withViewport viewport: CGSize) When interactions update and end call the corresponding functions on the camera controller Actual behavior It works when I begin/update/end interactions from mouse down events. It ignores any other event types, like magnification, scrollwheel, which work in e.g. the SceneKit Editor in Xcode. See MySCNView.swift in the repo for a demo. By overriding the camera controller's rotate function, I can see that it is called with deltas. This is great. But when I override translateInCameraSpaceBy my print statements don't appear and the scene doesn't translate. Expected behavior I expected SCNCameraController to also apply translations and rolls to the pointOfView by inspecting the currentEvent and figuring out what to do. I'm inclined to think that I'm supposed to call translateInCameraSpaceBy myself, but that seems inconsistent with how Begin/Continue/End interaction seems to call rotate. Demo repo: https://github.com/mortenjust/Camera-Control-Demo

A feature of my app I am in need of is to allow users to go through their room and mark specific positions, then be able to navigate these positions with a floor plan like a map. Think google maps but for your room, showing the user's position. I know it is possible to make a floor plan with RoomPlan, which could act as a map, but would it be possible after the plan is made to track a user's location in the room and show it? Is this too complex for RoomPlan? And if so how would I tackle this problem?

I am getting 4 warnings compiling the current template of sceneKit game /Users/helmut/Documents/spaceTime/scntool:1:1 Could not find bundle inside /Library/Developer/CommandLineTools any idea why the bundle is not installed I did a new download twice now still stuck getting these warnings about bundles not installed or not found any solution to correct the download install so the base dependencies are present thank you

I am developing a game where users can use their finger to move objects, and when the user releases their finger the game checks for overlap between objects and move the moved object back to it's original position if there is overlap. I am using SCNScene.PhysicsWorld.contactTest(with: ) to check for overlap between my nodes. However, the method only works correctly when nodes have physicsbodys using .convexHull, when I change it to .concavePolyHedron everything stops working and no contact is reported. I have set the physicbodys to be static so I am at a loss of what to do. Here is my code configuring the physicsbody for each node parentNode.physicsBody = SCNPhysicsBody(type: .static, shape: SCNPhysicsShape(node: parentNode, options: [.type: SCNPhysicsShape.ShapeType.concavePolyhedron, .collisionMargin: 0.0, .scale: scaleVector])) Here is my code calling contact test : if let test = currentNode?.physicsBody { let list = view.scene!.physicsWorld.contactTest(with: test) { ... } }

How do I trace a map on the floor as the user walks through their house, like a trail or heatmap, and then save this trail to CoreData Would it be possible to load and view this map later in the same spot? Or rescan the trail in the same area?

Hi all. I am new to swift and AR. I'm trying a project on AR and ran into a problem that I can't change the material on the models. With geometry such as a sphere or a cube, everything is simple. Tell me what am I doing wrong? My simple code: @IBOutlet var sceneView: ARSCNView! var modelNode: SCNNode! override func viewDidLoad() { super.viewDidLoad() sceneView.delegate = self sceneView.showsStatistics = true let scene = SCNScene(named: "art.scnassets/jacket.usdz")! modelNode = scene.rootNode.childNode(withName: "jacket", recursively: true) let material = SCNMaterial() material.diffuse.contents = UIImage(named: "art.scnassets/58.png") modelNode.childNodes[0].geometry?.materials = [material] sceneView.scene = scene

Hello everyone 👋 Occasional Apple developer yet first time poster Flo here. I've had this idea floating around my head for a while now, to develop a little toy that would make use of Apple's XDR displays, i.e. the one in my MBP. So essentially, I'm trying to do real-time 3D graphics utilising the HDR colour space, but I don't have the motivation to learn the bare metal Metal graphics API. SceneKit, so I figured, would allow me to explore the EDR-rendering pipeline, since to my knowledge they all (SpriteKit, RealityKit etc.) use Metal under the hood anyway. As per the WWDC '21 - Explore HDR rendering with EDR presentation, all I had to do was set a few properties on my view's underlying CAMetalLayer to enable EDR rendering for my macOS app. However, the SceneKit template in Xcode seems to be instantiating my view with a CALayer by default and when I try to replace it with a CAMetalLayer nothing gets rendered to the screen / window. Am I oversimplifying things? All I want to do is display a bunch of colours that are brighter than reference white :< If this is possible at all, I would appreciate any pointers. Thanks for reading 🙏

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

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?

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

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.

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.)