如何使用arcore和sceneform按钮从场景中删除单个渲染？

Question

我正在尝试创建一个按钮，在选中后会从场景中删除3d模型。

我知道删除3d对象的方法是使用anchor.detach（）。我可以使用node.select（）选择单个模型。但是，我不确定如何在选择节点后访问锚点。

FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                deleteObject(//I'm not sure how to get the anchor from the selected node//);
            }
        });

private void deleteObject(Anchor anchor){
        anchor.detach();
    }

Answer 1

如果你想删除一个特定的Renderable并且你已经知道了Anchronode，这就是我认为你的案例来自问题，那么下面的代码将删除Renderable和Anchornode：

private void removeAnchorNode(AnchorNode nodeToremove) {
        //Remove an anchor node
        if (nodeToremove != null) {
            arFragment.getArSceneView().getScene().removeChild(nodeToremove);
            nodeToremove.getAnchor().detach();
            nodeToremove.setParent(null);
            nodeToremove = null;
            Toast.makeText(LineViewMainActivity.this, "Test Delete - anchorNode removed", Toast.LENGTH_SHORT).show();
        } else {
            Toast.makeText(LineViewMainActivity.this, "Test Delete - markAnchorNode was null", Toast.LENGTH_SHORT).show();
        }
    }

吐司只是为了帮助测试，所以可以根据您的选择删除或保留。

Answer 2

我对帖子的作者有类似的问题，但我不知道如何获得我必须为此函数选择的Anchor Node：

private void removeAnchorNode(AnchorNode nodeToremove) {
    //Remove an anchor node
    if (nodeToremove != null) {
        arFragment.getArSceneView().getScene().removeChild(nodeToremove);
        nodeToremove.getAnchor().detach();
        nodeToremove.setParent(null);
        nodeToremove = null;
        Toast.makeText(LineViewMainActivity.this, "Test Delete - anchorNode removed", Toast.LENGTH_SHORT).show();
    } else {
        Toast.makeText(LineViewMainActivity.this, "Test Delete - markAnchorNode was null", Toast.LENGTH_SHORT).show();
    }
}