现在,当检测到卡时,我能够显示不同的SCNPlane.在显示SCNPlanes之后,用户触摸任何平面以显示新的SCNPlane.但是现在触摸工作正常,但新的SCNPlane没有显示.
这是我尝试过的代码：
var cake_1_PlaneNode : SCNNode? = nil
func renderer(_ renderer: SCNSceneRenderer,didAdd node: SCNNode,for anchor: aranchor) {
guard let imageAnchor = anchor as? ARImageAnchor else { return }
if let imageName = imageAnchor.referenceImage.name {
print(imageName)
if imageName == "menu" {
// Check To See The Detected Size Of Our menu Card (Should By 5cm*3cm)
let menuCardWidth = imageAnchor.referenceImage.physicalSize.width
let menuCardHeight = imageAnchor.referenceImage.physicalSize.height
print(
"""
We Have Detected menu Card With Name \(imageName)
\(imageName)'s Width Is \(menuCardWidth)
\(imageName)'s Height Is \(menuCardHeight)
""")
//raspBerry
//cake 1
let cake_1_Plane = SCNPlane(width: 0.045,height: 0.045)
cake_1_Plane.firstMaterial?.diffuse.contents = UIImage(named: "france")
cake_1_Plane.cornerRadius = 0.01
let cake_1_PlaneNode = SCNNode(geometry: cake_1_Plane)
self.cake_1_PlaneNode = cake_1_PlaneNode
cake_1_PlaneNode.eulerAngles.x = -.pi/2
cake_1_PlaneNode.runAction(SCNAction.moveBy(x: 0.15,y: 0,z: -0.125,duration: 0.75))
node.addChildNode(cake_1_PlaneNode)
self.sceneView.scene.rootNode.addChildNode(node)
}
}
override func touchesBegan(_ touches: Set<UITouch>,with event: UIEvent?) {
let touch = touches.first as! UITouch
if(touch.view == self.sceneView){
//print("touch working")
let viewTouchLocation:CGPoint = touch.location(in: sceneView)
guard let result = sceneView.hitTest(viewTouchLocation,options: nil).first else {
return
}
if let planeNode = cake_1_PlaneNode,cake_1_PlaneNode == result.node{
print("match")
cake_1()
}
}
}
func cake_1() {
let plane = SCNPlane(width: 0.15,height: 0.15)
plane.firstMaterial?.diffuse.contents = UIColor.black.withAlphaComponent(0.75)
let planeNodee = SCNNode(geometry: plane)
planeNodee.eulerAngles.x = -.pi / 2
planeNodee.runAction(SCNAction.moveBy(x: 0.21,z: 0,duration: 0))
} //cake_1
点击此链接：Detect touch on SCNNode in ARKit.
查看代码,我可以看到几个问题(更不用说变量和方法的命名约定).
首先,您正在创建一个您已声明的全局变量：
var cake_1_PlaneNode : SCNNode? = nil
但是,在yourDelegate回调中为cake_1_PlaneNode使用本地变量和全局变量：
let cake_1_PlaneNode = SCNNode(geometry: cake_1_Plane) self.cake_1_PlaneNode = cake_1_PlaneNode
这应该只是这样读：
self.cake_1_PlaneNode = SCNNode(geometry: cake_1_Plane)
其次,您将cake_1_PlaneNode添加到ARSCNView的rootNode而不是您检测到的ARImageAnchor,这可能是您不想做的事情,因为当检测到aranchor时：
You can provide visual content for the anchor by attaching geometry
(or other SceneKit features) to this node or by adding child nodes.
因此,这种方法(除非你真的想这样做)是不必要的.
剩下的问题在于你的cake_1函数本身.
首先,您实际上并没有将planeNodee添加到sceneHierachy中.
由于您尚未指定是否应将新初始化的planeNode直接添加到ARSCNView或作为cake_1_planeNode的childNode,因此您的函数应包括以下内容之一：
self.sceneView.scene.rootNode.addChildNode(planeNodee) self.cake_1_planeNode.addChildNode(planeNodee)
此外,可能还没有必要旋转您的planeNodee,因为默认情况下SCNPlane是垂直渲染的.
由于您没有规定放置内容的位置,因此可能不需要使用-.pi / 2,因为这可能使其几乎看不见肉眼.
另一个问题也可能导致您在实际添加节点时没有看到您的节点是Z位置.
如果您在同一位置设置2个节点,您可能会遇到一个称为Z-fighting的问题(您可以阅读更多关于here的信息).因此,您可能应该在添加节点时稍微向前移动添加的节点,例如SCNVector3(0,0.001)来解释这一点.
基于所有这些要点,我在下面提供了一个完整的工作和评论示例：
import UIKit
import ARKit
//-------------------------
//MARK: - ARSCNViewDelegate
//-------------------------
extension ViewController: ARSCNViewDelegate {
func renderer(_ renderer: SCNSceneRenderer,for anchor: aranchor) {
//1. Check We Have An ARImageAnchor,Then Get It's Reference Image & Name
guard let imageAnchor = anchor as? ARImageAnchor else { return }
let detectedTarget = imageAnchor.referenceImage
guard let detectedTargetName = detectedTarget.name else { return }
//2. If We Have Detected Our Virtual Menu Then Add The CakeOnePlane
if detectedTargetName == "cakeMenu" {
let cakeOnePlaneGeometry = SCNPlane(width: 0.045,height: 0.045)
cakeOnePlaneGeometry.firstMaterial?.diffuse.contents = UIColor.cyan
cakeOnePlaneGeometry.cornerRadius = 0.01
let cakeOnPlaneNode = SCNNode(geometry: cakeOnePlaneGeometry)
cakeOnPlaneNode.eulerAngles.x = -.pi/2
//3. To Allow Us To Easily Keep Track Our Our Currently Added Node We Will Assign It A Unique Name
cakeOnPlaneNode.name = "StrawBerry Cake"
node.addChildNode(cakeOnPlaneNode)
cakeOnPlaneNode.runAction(SCNAction.moveBy(x: 0.15,duration: 0.75))
}
}
}
class ViewController: UIViewController {
@IBOutlet var augmentedRealityView: ARSCNView!
let augmentedRealitySession = ARSession()
let configuration = ARWorldTrackingConfiguration()
//------------------
//MARK: - Life Cycle
//------------------
override func viewDidLoad() {
super.viewDidLoad()
setupARSession()
}
//-----------------
//MARK: - ARSession
//-----------------
/// Runs The ARSession
func setupARSession(){
//1. Load Our Detection Images
guard let detectionImages = ARReferenceImage.referenceImages(inGroupNamed: "AR Resources",bundle: nil) else { return }
//2. Configure & Run Our ARSession
augmentedRealityView.session = augmentedRealitySession
augmentedRealityView.delegate = self
configuration.detectionImages = detectionImages
augmentedRealitySession.run(configuration,options: [.resetTracking,.removeExistingAnchors])
}
//--------------------
//MARK: - Interaction
//--------------------
override func touchesBegan(_ touches: Set<UITouch>,with event: UIEvent?) {
//1. Get The Current Touch Location & Perform An ARSCNHitTest To Check For Any Hit SCNNode's
guard let currentTouchLocation = touches.first?.location(in: self.augmentedRealityView),let hitTestNode = self.augmentedRealityView.hitTest(currentTouchLocation,options: nil).first?.node else { return }
//2. If We Have Hit Our StrawBerry Cake Then We Call Our makeCakeOnNode Function
if let cakeID = hitTestNode.name,cakeID == "StrawBerry Cake"{
makeCakeOnNode(hitTestNode)
}
}
/// Adds An SCNPlane To A Detected Cake Target
///
/// - Parameter node: SCNNode
func makeCakeOnNode(_ node: SCNNode){
let planeGeometry = SCNPlane(width: 0.15,height: 0.15)
planeGeometry.firstMaterial?.diffuse.contents = UIColor.black.withAlphaComponent(0.75)
let planeNode = SCNNode(geometry: planeGeometry)
planeNode.position = SCNVector3(0,0.001)
planeNode.runAction(SCNAction.moveBy(x: 0.21,duration: 0))
node.addChildNode(planeNode)
}
}
这在我的设备上产生以下内容：
对于您的信息,这似乎表明您放置内容的计算是关闭的(除非当然这是期望的结果).
正如您所看到的,所有内容都正确呈现,但是这些内容的间距非常大,因此您可能需要稍微平移设备,以便在进一步测试和开发时看到它们.
希望能帮助到你…