ARCORE: remove a specific renderable by clicking on this renderable

问题

I'm working on a project using Sceneform from ARCore. I develop it base on HelloSceneform example provided by ARCore. What I wanna do is adding a renderable object by a hit and then delete it when I click on the specific renderable on the screen. I've tried method AnchorNode.setOnTapListener as following, but it didn't work(no response):

anchorNode.setOnTapListener(new Node.OnTapListener() {
                      @Override
                      public void onTap(HitTestResult hitTestResult, MotionEvent motionEvent) {
                          if(anchorNode.getAnchor()!=null){
                              arFragment.getArSceneView().getScene().removeChild(anchorNode);
                              anchorNode.getAnchor().detach();
                              anchorNode.setParent(null);
                          }
                      }
                  });

I also tried the following method, which causes unexpected close:

      Scene scene = arFragment.getArSceneView().getScene();
      scene.addOnPeekTouchListener(new Scene.OnPeekTouchListener() {
          @Override
          public void onPeekTouch(HitTestResult hitTestResult, MotionEvent motionEvent) {
              Node node = hitTestResult.getNode();
              node.setParent(null);
          }
      });

Is there any method could achieve this feature?

回答1:

The code below should detect the touch and delete the node.

If you want to have a separate button to delete a selected node you can add a regular button and listener and just use the 'touch' event to select the node you want to delete.

private void handleOnTouch(HitTestResult hitTestResult, MotionEvent motionEvent) {
        Log.d(TAG,"handleOnTouch");
        // First call ArFragment's listener to handle TransformableNodes.
        arFragment.onPeekTouch(hitTestResult, motionEvent);

        //We are only interested in the ACTION_UP events - anything else just return
        if (motionEvent.getAction() != MotionEvent.ACTION_UP) {
            return;
        }

        // Check for touching a Sceneform node
        if (hitTestResult.getNode() != null) {
            Log.d(TAG,"handleOnTouch hitTestResult.getNode() != null");
            Node hitNode = hitTestResult.getNode();

            if (hitNode.getRenderable() == andyRenderable) {
                Toast.makeText(LineViewMainActivity.this, "We've hit Andy!!", Toast.LENGTH_SHORT).show();
                arFragment.getArSceneView().getScene().removeChild(hitNode);
                AnchorNode hitNodeAnchor = (AnchorNode) hitNode;
                if (hitNodeAnchor != null) {
                     hitNode.getAnchor().detach();
                }
                hitNode.setParent(null);
                hitNode = null;
             }
        }

}

The above is extracted from various parts of a VR test application and combined here for a concise example - the full working application source is available here: https://github.com/mickod/LineView

回答2:

I know i am late but it may be helpful for someone.

Node you want to remove, first of you have to select that Transferable node by click or touch that node.
TransfarableNode.setOnTapListener this bulit in method serve purpose for us.
After that get node from HitTestResult and than detach node.

Here is the code you can use for selecting and removing node.

    transformableNode.setParent(anchorNode );
    transformableNode.setRenderable(model_nodeRenderable);
    transformableNode.select();
    transformableNode.setOnTapListener((HitTestResult hitTestResult, MotionEvent Event) ->
    {

       Node nodeToRemove = hitTestResult.getNode();
       anchorNode.removeChild(nodeToRemove );

    });

来源：https://stackoverflow.com/questions/54811991/arcore-remove-a-specific-renderable-by-clicking-on-this-renderable

标签

arcore

sceneform