hitTest.md

hitTest

Searches the renderer’s scene for objects corresponding to a point in the rendered image.

SCNView, SCNLayer, and SCNRenderer 안에서 주어진 포인트(좌표)에 해당하는 오브젝트가 있는지 체크한다.

func hitTest(_ point: CGPoint,
     options: [SCNHitTestOption : Any]? = nil) -> [SCNHitTestResult]

Example

@objc func handleTapGesture(_ sender: UITapGestureRecognizer) {
   let sceneViewTappedOn = sender.view as! SCNView
   let touchCoordinates = sender.location(in: sceneViewTappedOn)
   let hitTest = sceneViewTappedOn.hitTest(touchCoordinates)

   if hitTest.isEmpty {
      print("didn't touch anything")
   } else {
      print(hitTest)
   }
}

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