获取 ARKIT 中聚焦相机的所有 ARAnchors

问题描述

当应用程序首先启动时，在一面墙上检测到垂直表面，而不是相机聚焦到第二面墙，在第二面墙上检测到另一个表面.第一面墙现在对 ARCamera 不再可见，但此代码为我提供了第一面墙的锚点.但我需要第二面墙的锚点，现在在相机中可见/聚焦.

if let anchor = sceneView.session.currentFrame?.anchors.first {
    let node = sceneView.node(for: anchor)
    addNode(position: SCNVector3Zero, anchorNode: node)
} else {
    debugPrint("anchor node is nil")
}

推荐答案

为了获得当前处于视点中的节点，您可以执行以下操作:

In order to get the node that is currently is in point of view you can do something like this:

       var targettedAnchorNode: SCNNode?
       if let anchors = sceneView.session.currentFrame?.anchors {
           for anchor in anchors {

               if let anchorNode = sceneView.node(for: anchor), let pointOfView = sceneView.pointOfView, sceneView.isNode(anchorNode, insideFrustumOf: pointOfView) {
                   targettedAnchorNode = anchorNode
                   break
               }
           }

           if let targettedAnchorNode = targettedAnchorNode {
               addNode(position: SCNVector3Zero, anchorNode: targettedAnchorNode)
           } else {
               debugPrint("Targetted node not found")
           }

       } else {
           debugPrint("Anchors not found")
       }

如果你想得到所有的焦点节点，把它们收集到一个满足指定条件的数组中

If you would like to get all focused nodes, collect them in an array satisfying specified condition

祝你好运！

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