在ARKit中,可以使用ARPlaneAnchor来检测和追踪平面。以下是一个示例代码,展示了如何使用ARKit检测平面:
import ARKit
class ViewController: UIViewController, ARSCNViewDelegate {
@IBOutlet var sceneView: ARSCNView!
override func viewDidLoad() {
super.viewDidLoad()
sceneView.delegate = self
let configuration = ARWorldTrackingConfiguration()
configuration.planeDetection = .horizontal
sceneView.session.run(configuration)
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
let configuration = ARWorldTrackingConfiguration()
configuration.planeDetection = .horizontal
sceneView.session.run(configuration)
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
sceneView.session.pause()
}
func renderer(_ renderer: SCNSceneRenderer, didAdd node: SCNNode, for anchor: ARAnchor) {
guard let planeAnchor = anchor as? ARPlaneAnchor else { return }
let planeNode = createPlaneNode(center: planeAnchor.center, extent: planeAnchor.extent)
node.addChildNode(planeNode)
}
func createPlaneNode(center: simd_float3, extent: simd_float3) -> SCNNode {
let planeGeometry = SCNPlane(width: CGFloat(extent.x), height: CGFloat(extent.z))
let planeNode = SCNNode(geometry: planeGeometry)
planeNode.position = SCNVector3(center.x, 0, center.z)
planeNode.eulerAngles.x = -.pi / 2
planeNode.opacity = 0.5
return planeNode
}
}
这段代码中,首先在viewDidLoad
和viewWillAppear
方法中配置了ARWorldTrackingConfiguration,并开启了水平平面检测。然后在renderer(_:didAdd:for:)
方法中,通过判断ARAnchor是否为ARPlaneAnchor来创建平面节点,并将其添加到场景中。
此外,还可以在ARSCNViewDelegate中的其他方法中处理平面更新,例如当检测到新的平面时,在renderer(_:didUpdate:for:)
方法中更新平面节点的位置和大小。
希望这个示例代码能帮到你!