Create an AR scene that tracks planes. Clicking on a plane places a 3D Object on that spot.

ViroARHelloWorldActivity_onRendererStart.java

    /**
     * Create an AR scene that tracks planes. Clicking on a plane places a 3D Object on that spot.
     */
    @Override
    public void onRendererStart() {
        // Create the 3d ar scene, and display the point clouds.
        mScene = new ARScene();
        mScene.displayPointCloud(true);

        // Create an TrackedPlanesController to visually display tracked planes
        TrackedPlanesController controller = new TrackedPlanesController(this, mViroView);

        // Spawn a 3D Droid on the position where the user has clicked on a tracked plane.
        controller.addOnPlaneClickListener(new ClickListener() {
            @Override
            public void onClick(int i, Node node, Vector clickPosition) {
                createDroidAtPosition(clickPosition);
            }

            @Override
            public void onClickState(int i, Node node, ClickState clickState, Vector vector) {
                //No-op
            }
        });

        mScene.setListener(controller);
        mViroView.setScene(mScene);
    }