如何使用arcore和sceneform使用按钮从场景中删除单个可渲染对象? [英] How do I delete individual renderables from the scene using a button using arcore and sceneform?

问题描述

我正在尝试制作一个按钮，可以在选择后从场景中删除 3d 模型.

I'm trying to make a button that will delete a 3d model from the scene after it is selected.

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.

I know that the way to delete 3d objects is by using anchor.detach(). And I can select individual models using node.select(). However, I am not sure how to access the anchor after selecting the node.

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();
    }

推荐答案

如果你想删除一个特定的 Renderable 并且你已经知道 Anchronode，这就是我相信你的案例来自问题，那么下面的代码将删除可渲染和锚节点:

If you want to delete a particular Renderable and you already know the Anchronode, which is what I believe your case is from the question, then the code below will remove the Renderable and 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();
        }
    }

toast 只是为了帮助测试，因此可以根据您的选择移除或留下.

The toast are just to help testing so can be removed or left as you choose.

更新 - Kotlin 版本(2020 年 4 月测试):

Update - Kotlin version (tested April 2020):

    private fun removeAnchorNode(nodeToRemove: AnchorNode) {
        //Remove an Anchor node
        arFragment.getArSceneView().getScene().removeChild(nodeToRemove);
        nodeToRemove.getAnchor()?.detach();
        nodeToRemove.setParent(null);
        nodeToRemove.renderable = null
    }

这篇关于如何使用arcore和sceneform使用按钮从场景中删除单个可渲染对象?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！