Hello, I'm trying to understand physics by placing objects but I have a positioning problem. In fact, I create a floor with static physics and then a static block as well. I position the two elements at position 0 but the block crosses the ground by half. Why? this is my playground import SceneKit import PlaygroundSupport // create a scene view with an empty scene var sceneView = SCNView(frame: CGRect(x: 0, y: 0, width: 300, height: 300)) var scene = SCNScene() sceneView.scene = scene // start a live preview of that view PlaygroundPage.current.liveView = sceneView // default lighting sceneView.autoenablesDefaultLighting = true sceneView.allowsCameraControl = true sceneView.debugOptions = [.showPhysicsShapes] // a camera var cameraNode = SCNNode() cameraNode.camera = SCNCamera() cameraNode.position = SCNVector3(x: 0, y: 0, z: 3) scene.rootNode.addChildNode(cameraNode) // Make floor node let floorNode = SCNNode() let floor = SCNFloor() floor.reflectivity = 0.25 floorNode.geometry = floor floorNode.physicsBody = SCNPhysicsBody(type: .static, shape: nil) scene.rootNode.addChildNode(floorNode) // Add box let cube = SCNNode(geometry: SCNBox(width: 1, height: 1, length: 1, chamferRadius: 0)) cube.geometry?.firstMaterial?.diffuse.contents = UIColor.red cube.position = SCNVector3(0, 0, 0) cube.physicsBody = SCNPhysicsBody(type: .static, shape:SCNPhysicsShape(geometry: cube.geometry!, options: nil)) scene.rootNode.addChildNode(cube) thanks !

Hello I try to understand the movement of a character with physics. To do this, I imported max into the fox2 file provided by Apple. I apply a .static physics to it and I have a floor with static physics and static blocks to test collisions everything works very well except that Max is above the ground. He doesn't touch my ground. I couldn't understand why until I had the physicsShapes displayed in the debug options. With that I see that if max does not touch the ground it is because the automatic shape is below Max and this shape touches the ground. So I would like to know why the shape is shifted downwards and how to correct this problem? I did tests and the problem seems to come from physicsBody?.mass. If I remove the mass, the shape is correct but when I move my character it crosses the walls and when I put it on it is well stopped by the static boxes... Someone with an idea of how to correct this problem? This is my simplify code import SceneKit import PlaygroundSupport // create a scene view with an empty scene var sceneView = SCNView(frame: CGRect(x: 0, y: 0, width: 300, height: 300)) var scene = SCNScene() sceneView.scene = scene // start a live preview of that view PlaygroundPage.current.liveView = sceneView // default lighting sceneView.autoenablesDefaultLighting = true sceneView.allowsCameraControl = true sceneView.debugOptions = [.showPhysicsShapes] // a camera var cameraNode = SCNNode() cameraNode.camera = SCNCamera() cameraNode.position = SCNVector3(x: 0, y: 0, z: 3) scene.rootNode.addChildNode(cameraNode) // Make floor node let floorNode = SCNNode() let floor = SCNFloor() floor.reflectivity = 0.25 floorNode.geometry = floor floorNode.physicsBody = SCNPhysicsBody(type: .static, shape: nil) scene.rootNode.addChildNode(floorNode) //add character guard let fichier = SCNScene(named: "max.scn") else { fatalError("failed to load Max.scn") } guard let character = fichier.rootNode.childNode(withName: "Max_rootNode", recursively: true) else { fatalError("Failed to find Max_rootNode") } scene.rootNode.addChildNode(character) character.position = SCNVector3(0, 0, 0) character.physicsBody = SCNPhysicsBody(type: .static, shape: nil) character.physicsBody?.mass = 5 Thank you!

I’m wondering if it’s possible to use SceneKit or GamePlayKit to handle physics etc and having SwiftUI to create the 3D content?

I am creating an AR app that uses ARKit and SceneKit. Will visionOS support SceneKit AR applications, or will I have to rewrite my app using RealityKit? Thanks for answering my question. : - )