ARImageAnchor在与SCNNode的方向关系中。

huangapple
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英文:

ARImageAnchor orientation in relation to a SCNNode

问题

我的当前代码库提供了与世界相关的ARImageAnchor的方向（俯仰，偏航，翻滚）。我想要实现的目标是获取ARImageAnchor方向数据，相对于在启动会话后的某个时间添加的节点。

  1. func renderer(_ renderer: SCNSceneRenderer, didAdd node: SCNNode, for anchor: ARAnchor) {
  3.      guard let _ = anchor as? ARImageAnchor else { return }
  4.     
  5.      DispatchQueue.main.async {
  7.         let cylinderNode = SCNNode()
  8.         cylinderNode.geometry = SCNCylinder(radius: 0.05, height: 0.4)
  9.         node.addChildNode(cylinderNode)
  10.         
  11.         let ea: SCNVector3 = node.eulerAngles
  12.         
  13.         print(self.convert(ea.x), self.convert(ea.y), self.convert(ea.z))
  14.     }
  15. }

希望能提供帮助！

英文:

My current code base provides the orientation (pitch, yaw, roll) of an ARImageAnchor in relation to the world. What I want to achieve is to get the ARImageAnchor orientation data in relation to a node that has been added sometime after starting the session.

  1. func renderer(_ renderer: SCNSceneRenderer, didAdd node: SCNNode,
  2.                                              for anchor: ARAnchor) {
  4.      guard let _ = anchor as? ARImageAnchor else { return }
  5.     
  6.      DispatchQueue.main.async {
  8.         let cylinderNode = SCNNode()
  9.         cylinderNode.geometry = SCNCylinder(radius: 0.05, height: 0.4)
  10.         node.addChildNode(cylinderNode)
  11.         
  12.         let ea: SCNVector3 = node.eulerAngles
  13.         
  14.         print(self.convert(ea.x), self.convert(ea.y), self.convert(ea.z))
  15.     }
  16. }

Any help would be much appreciated!

答案1

得分: 1

你可以将锚点的 orientation part 部分从 simd_float4x4 transform 传递给你的模型（请注意，这些数据存储在当前会话的每个 ARFrame 中），以恢复位置：

  1. import ARKit
  2. import SceneKit
  4. class ViewController: UIViewController, ARSCNViewDelegate {
  6.     @IBOutlet var sceneView: ARSCNView!
  7.     var model = SCNNode()
  9.     override func viewDidLoad() {
  10.         super.viewDidLoad()
  11.         sceneView.delegate = self
  13.         sceneView.scene = SCNScene(named: "ARScene")!
  14.         model = sceneView.scene.rootNode.childNode(withName: "model",
  15.                                                    recursively: true)!
  16.     }
  18.     @IBAction func passTransformButton(_ sender: UIButton) {
  20.         if let trans = sceneView.session.currentFrame?.anchors[0].transform {
  22.             model.simdTransform = trans          // Full Transform
  24.             model.simdTransform.columns.3.x = 0  // 恢复位置 X
  25.             model.simdTransform.columns.3.y = 0  // 恢复位置 Y
  26.             model.simdTransform.columns.3.z = 0  // 恢复位置 Z
  27.         }
  28.     }
  29. }
英文:

You can pass anchor's orientation part of the simd_float4x4 transform to your model (note that this data is stored in each ARFrame of the current session) restoring position:

  1. import ARKit
  2. import SceneKit
  4. class ViewController : UIViewController, ARSCNViewDelegate {
  5.     
  6.     @IBOutlet var sceneView: ARSCNView!
  7.     var model = SCNNode()
  8.     
  9.     override func viewDidLoad() {
  10.         super.viewDidLoad()
  11.         sceneView.delegate = self
  13.         sceneView.scene = SCNScene(named: "ARScene")!
  14.         model = sceneView.scene.rootNode.childNode(withName: "model", 
  15.                                                 recursively: true)!
  16.     }
  17.     
  18.     @IBAction func passTransformButton(_ sender: UIButton) {
  20.         if let trans = sceneView.session.currentFrame?.anchors[0].transform {
  22.             model.simdTransform = trans          // Full Transform
  24.             model.simdTransform.columns.3.x = 0  // restore position X
  25.             model.simdTransform.columns.3.y = 0  // restore position Y
  26.             model.simdTransform.columns.3.z = 0  // restore position Z
  27.         }
  28.     }
  29. }

huangapple
  • 本文由 发表于 2023年4月10日 23:10:43
  • 转载请务必保留本文链接：https://go.coder-hub.com/75978284.html
  • arkit
  • augmented-reality
  • scenekit
  • swift
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