Hi all, I'm playing around with RealityKit to see if I can re-use the content for both iOS/macOS and visionOS with the new betas. For the 2D devices, I'm looking at a more traditional, non AR setup. I've fallen over at the first hurdle; dragging an object around on a plane just as a test of how things all work. I was trying to unproject from a plane to the view/window co-ordinates and move the box around based on the result. The code below works if I angle the plane, weirdly; but not if the plane (as I understand it) is 'flat' on the ground. Am I doing this the wrong way? It behaves in a similar fashion with both the default PerspectiveCameraComponent and OrthographicCameraComponent. import SwiftUI import RealityKit struct ContentView: View { var body: some View { RealityView { content in let cubemesh = MeshResource.generateBox(size: 0.2, cornerRadius: 0.05) let cubeModel = ModelEntity(mesh: cubemesh) cubeModel.generateCollisionShapes(recursive: false) cubeModel.components.set(InputTargetComponent()) content.add(cubeModel) let cameraEntity = Entity() cameraEntity.components.set(OrthographicCameraComponent()) //cameraEntity.components.set(PerspectiveCameraComponent()) let cameraPosition: SIMD3<Float> = [10, 10, 5] let target: SIMD3<Float> = .zero cameraEntity.look(at: target, from: cameraPosition, relativeTo: nil) content.add(cameraEntity) } .gesture(DragGesture(coordinateSpace: .global) .targetedToAnyEntity() .onChanged() { value in let planeTransform = Transform(scale: SIMD3<Float>(1, 1, 1), rotation: simd_quatf(angle: 0, axis: SIMD3<Float>(0, 1, 0)), translation: SIMD3<Float>(0, 0, -1)) print(planeTransform.matrix) #if !os(visionOS) if let placementPosition = value.unproject(value.location, from: .global, to: .scene, ontoPlane: (planeTransform.matrix)) { print("projected value:", placementPosition) value.entity.position.x = placementPosition.x value.entity.position.y = placementPosition.y value.entity.position.z = 0 } #endif print(value.location) }) } } #if os(visionOS) #Preview("3D Device", windowStyle: .volumetric) { if #available(visionOS 2.0, *) { ContentView() .volumeBaseplateVisibility(.visible) .frame(depth: 1300) .frame(width: 1280) .frame(height: 1280) } else { ContentView() } } #else #Preview("2D Device") { ContentView() } #endif