Android 如何将对象从一个锚点移动到另一个锚点？
我的用例是：Android 如何将对象从一个锚点移动到另一个锚点？,android,arcore,sceneform,Android,Arcore,Sceneform,我的用例是： 点击屏幕并将“点”保存为起始锚点 再次点击屏幕，并将“点”保存为结束锚定 按下将对象从起点移动到终点的按钮 我已经使用ObjectAnimator构建了自己的节点，类似于太阳系示例中的节点。我唯一的问题是，我不知道如何确定评估者的起点和终点。我的第一个想法是从开始和结束锚点的姿势取x，y，z Vector3 start = new Vector3(startAnchor.getPose().tx(), startAnchor.getPose().ty(), startAnchor.
ObjectAnimatorVector3 start = new Vector3(startAnchor.getPose().tx(), startAnchor.getPose().ty(), startAnchor.getPose().tz());
Vector3 end = new Vector3(endAnchor.getPose().tx(), endAnchor.getPose().ty(), endAnchor.getPose().tz());
所以问题是：如何制作一个从锚a到锚B的流畅动画（一张简单的幻灯片就足够了？我在HelloSceneform示例中这样做了。我创建了第一个AnchorNode，并作为子节点添加了“andy”节点。在下一次点击时，我创建了endPosition锚点节点，并开始动画移动到该位置 要记住的是，如果使用具有不同父对象的对象的位置，则需要使用worldPosition vs.localPosition
private void onPlaneTap(HitResult hitResult, Plane plane, MotionEvent motionEvent) {
if (andyRenderable == null) {
return;
}
// Create the Anchor.
Anchor anchor = hitResult.createAnchor();
// Create the starting position.
if (startNode == null) {
startNode = new AnchorNode(anchor);
startNode.setParent(arFragment.getArSceneView().getScene());
// Create the transformable andy and add it to the anchor.
andy = new Node();
andy.setParent(startNode);
andy.setRenderable(andyRenderable);
} else {
// Create the end position and start the animation.
endNode = new AnchorNode(anchor);
endNode.setParent(arFragment.getArSceneView().getScene());
startWalking();
}
}
private void startWalking() {
objectAnimation = new ObjectAnimator();
objectAnimation.setAutoCancel(true);
objectAnimation.setTarget(andy);
// All the positions should be world positions
// The first position is the start, and the second is the end.
objectAnimation.setObjectValues(andy.getWorldPosition(), endNode.getWorldPosition());
// Use setWorldPosition to position andy.
objectAnimation.setPropertyName("worldPosition");
// The Vector3Evaluator is used to evaluator 2 vector3 and return the next
// vector3. The default is to use lerp.
objectAnimation.setEvaluator(new Vector3Evaluator());
// This makes the animation linear (smooth and uniform).
objectAnimation.setInterpolator(new LinearInterpolator());
// Duration in ms of the animation.
objectAnimation.setDuration(500);
objectAnimation.start();
}
/**
*这是一个使用Sceneform UX包简化常见AR任务的示例活动。
*/
公共类MainActivity扩展了AppCompatActivity{
私有静态最终字符串标记=MainActivity.class.getSimpleName（）；
私有静态最终double MIN_OPENGL_版本=3.1；
会话中断；
私有ArFragment-ArFragment；
私人ArSceneView ArSceneView；
私有模型可渲染和可渲染；
私有布尔值shouldConfigureSession=false；
私有布尔modelpadded=false；
私有ObjectAnimator objectAnimation；
私有可转换节点；
专用锚点端节点；
私人手势检测器可跟踪手势检测器；
/**
*如果Sceneform无法运行，则返回false并显示错误消息；如果Sceneform可以运行，则返回true
*在这个设备上。
*
*Sceneform需要设备上的Android N以及OpenGL 3.1功能。
*
*如果Sceneform无法运行，则完成活动
*/
公共静态布尔检查IsSupportedDeviceorFinish（最终活动）{
if（Build.VERSION.SDK\u INT（InputStream）新文件InputStream（文件）；
FutureTask任务=新的FutureTask（可调用）；
新线程（任务）.start（）；
ModelRenderable.builder（）
.setSource（this，R.raw.model）/.setSource（this，可调用）
.build（）
.thenAccept（可渲染->可渲染=可渲染）
.例外(
可丢弃->{
吐司=
Toast.makeText（这是“无法加载andy renderable”，Toast.LENGTH\u LONG）；
toast.setGravity（Gravity.CENTER，0,0）；
toast.show（）；
返回null；
});
arFragment.setOnTapArPlaneListener(
（HitResult HitResult、平面、运动事件）->{
if（andyRenderable==null）{
返回；
}
如果（已添加模型）{
endNode=新主播
private void onPlaneTap(HitResult hitResult, Plane plane, MotionEvent motionEvent) {
if (andyRenderable == null) {
return;
}
// Create the Anchor.
Anchor anchor = hitResult.createAnchor();
// Create the starting position.
if (startNode == null) {
startNode = new AnchorNode(anchor);
startNode.setParent(arFragment.getArSceneView().getScene());
// Create the transformable andy and add it to the anchor.
andy = new Node();
andy.setParent(startNode);
andy.setRenderable(andyRenderable);
} else {
// Create the end position and start the animation.
endNode = new AnchorNode(anchor);
endNode.setParent(arFragment.getArSceneView().getScene());
startWalking();
}
}
private void startWalking() {
objectAnimation = new ObjectAnimator();
objectAnimation.setAutoCancel(true);
objectAnimation.setTarget(andy);
// All the positions should be world positions
// The first position is the start, and the second is the end.
objectAnimation.setObjectValues(andy.getWorldPosition(), endNode.getWorldPosition());
// Use setWorldPosition to position andy.
objectAnimation.setPropertyName("worldPosition");
// The Vector3Evaluator is used to evaluator 2 vector3 and return the next
// vector3. The default is to use lerp.
objectAnimation.setEvaluator(new Vector3Evaluator());
// This makes the animation linear (smooth and uniform).
objectAnimation.setInterpolator(new LinearInterpolator());
// Duration in ms of the animation.
objectAnimation.setDuration(500);
objectAnimation.start();
}
/**
* This is an example activity that uses the Sceneform UX package to make common AR tasks easier.
*/
public class MainActivity extends AppCompatActivity {
private static final String TAG = MainActivity.class.getSimpleName();
private static final double MIN_OPENGL_VERSION = 3.1;
Session mSession;
private ArFragment arFragment;
private ArSceneView arSceneView;
private ModelRenderable andyRenderable;
private boolean shouldConfigureSession = false;
private boolean modelAdded = false;
private ObjectAnimator objectAnimation;
private TransformableNode andy;
private AnchorNode endNode;
private GestureDetector trackableGestureDetector;
/**
* Returns false and displays an error message if Sceneform can not run, true if Sceneform can run
* on this device.
* <p>
* <p>Sceneform requires Android N on the device as well as OpenGL 3.1 capabilities.
* <p>
* <p>Finishes the activity if Sceneform can not run
*/
public static boolean checkIsSupportedDeviceOrFinish(final Activity activity) {
if (Build.VERSION.SDK_INT < VERSION_CODES.N) {
Log.e(TAG, "Sceneform requires Android N or later");
Toast.makeText(activity, "Sceneform requires Android N or later", Toast.LENGTH_LONG).show();
activity.finish();
return false;
}
String openGlVersionString =
((ActivityManager) activity.getSystemService(Context.ACTIVITY_SERVICE))
.getDeviceConfigurationInfo()
.getGlEsVersion();
if (Double.parseDouble(openGlVersionString) < MIN_OPENGL_VERSION) {
Log.e(TAG, "Sceneform requires OpenGL ES 3.1 later");
Toast.makeText(activity, "Sceneform requires OpenGL ES 3.1 or later", Toast.LENGTH_LONG)
.show();
activity.finish();
return false;
}
return true;
}
@Override
@SuppressWarnings({"AndroidApiChecker", "FutureReturnValueIgnored"})
// CompletableFuture requires api level 24
// FutureReturnValueIgnored is not valid
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (!checkIsSupportedDeviceOrFinish(this)) {
return;
}
setContentView(R.layout.activity_main);
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 105);
arFragment = (ArFragment) getSupportFragmentManager().findFragmentById(R.id.ux_fragment);
if (arFragment != null) {
arFragment.getPlaneDiscoveryController().hide();
arFragment.getPlaneDiscoveryController().setInstructionView(null);
}
arSceneView = arFragment.getArSceneView();
arSceneView.getScene().addOnUpdateListener((this::onUpdateFrame));
arFragment.getArSceneView().getScene().addOnPeekTouchListener(this::handleOnTouch);
this.trackableGestureDetector = new GestureDetector(this, new GestureDetector.SimpleOnGestureListener() {
public boolean onSingleTapUp(MotionEvent e) {
onSingleTap(e);
return true;
}
public boolean onDown(MotionEvent e) {
return true;
}
});
// When you build a Renderable, Sceneform loads its resources in the background while returning
// a CompletableFuture. Call thenAccept(), handle(), or check isDone() before calling get().
File file = new File(Environment.getExternalStorageDirectory(), "model.sfb");
Uri photoURI = Uri.fromFile(file);
Callable callable = () -> (InputStream) new FileInputStream(file);
FutureTask task = new FutureTask<>(callable);
new Thread(task).start();
ModelRenderable.builder()
.setSource(this, R.raw.model) //.setSource(this, callable)
.build()
.thenAccept(renderable -> andyRenderable = renderable)
.exceptionally(
throwable -> {
Toast toast =
Toast.makeText(this, "Unable to load andy renderable", Toast.LENGTH_LONG);
toast.setGravity(Gravity.CENTER, 0, 0);
toast.show();
return null;
});
arFragment.setOnTapArPlaneListener(
(HitResult hitResult, Plane plane, MotionEvent motionEvent) -> {
if (andyRenderable == null) {
return;
}
if (modelAdded) {
endNode = new AnchorNode(hitResult.createAnchor());
endNode.setParent(arFragment.getArSceneView().getScene());
startWalking();
}
});
}
private void handleOnTouch(HitTestResult hitTestResult, MotionEvent motionEvent) {
// First call ArFragment's listener to handle TransformableNodes.
arFragment.onPeekTouch(hitTestResult, motionEvent);
// Check for touching a Sceneform node
if (hitTestResult.getNode() != null) {
return;
}
// Otherwise call gesture detector.
trackableGestureDetector.onTouchEvent(motionEvent);
}
private void onSingleTap(MotionEvent motionEvent) {
Frame frame = arFragment.getArSceneView().getArFrame();
if (frame != null && motionEvent != null && frame.getCamera().getTrackingState() == TrackingState.TRACKING) {
for (HitResult hit : frame.hitTest(motionEvent)) {
Trackable trackable = hit.getTrackable();
if (trackable instanceof Plane && ((Plane) trackable).isPoseInPolygon(hit.getHitPose())) {
Plane plane = (Plane) trackable;
endNode = new AnchorNode(plane.createAnchor(plane.getCenterPose()));
endNode.setParent(arFragment.getArSceneView().getScene());
startWalking();
// Handle plane hits.
break;
} else if (trackable instanceof Point) {
// Handle point hits
Point point = (Point) trackable;
endNode = new AnchorNode(point.createAnchor(hit.getHitPose()));
endNode.setParent(arFragment.getArSceneView().getScene());
startWalking();
} else if (trackable instanceof AugmentedImage) {
// Handle image hits.
AugmentedImage image = (AugmentedImage) trackable;
endNode = new AnchorNode(image.createAnchor(image.getCenterPose()));
endNode.setParent(arFragment.getArSceneView().getScene());
startWalking();
}
}
}
}
private void startWalking() {
objectAnimation = new ObjectAnimator();
objectAnimation.setAutoCancel(true);
objectAnimation.setTarget(andy);
// All the positions should be world positions
// The first position is the start, and the second is the end.
objectAnimation.setObjectValues(andy.getWorldPosition(), endNode.getWorldPosition());
// Use setWorldPosition to position andy.
objectAnimation.setPropertyName("worldPosition");
// The Vector3Evaluator is used to evaluator 2 vector3 and return the next
// vector3. The default is to use lerp.
objectAnimation.setEvaluator(new Vector3Evaluator());
// This makes the animation linear (smooth and uniform).
objectAnimation.setInterpolator(new LinearInterpolator());
// Duration in ms of the animation.
objectAnimation.setDuration(500);
objectAnimation.start();
}
private void configureSession() {
Config config = new Config(mSession);
if (!setupAugmentedImageDb(config)) {
Toast.makeText(this, "Could not setup augmented", Toast.LENGTH_SHORT).show();
}
config.setUpdateMode(Config.UpdateMode.LATEST_CAMERA_IMAGE);
mSession.configure(config);
}
@Override
public void onPause() {
super.onPause();
if (mSession != null) {
// Note that the order matters - GLSurfaceView is paused first so that it does not try
// to query the session. If Session is paused before GLSurfaceView, GLSurfaceView may
// still call session.update() and get a SessionPausedException.
arSceneView.pause();
mSession.pause();
}
}
@Override
protected void onResume() {
super.onResume();
if (mSession == null) {
String message = null;
Exception exception = null;
try {
mSession = new Session(this);
} catch (UnavailableArcoreNotInstalledException
e) {
message = "Please install ARCore";
exception = e;
} catch (UnavailableApkTooOldException e) {
message = "Please update ARCore";
exception = e;
} catch (UnavailableSdkTooOldException e) {
message = "Please update this app";
exception = e;
} catch (Exception e) {
message = "This device does not support AR";
exception = e;
}
if (message != null) {
Toast.makeText(this, message, Toast.LENGTH_SHORT).show();
Log.e(TAG, "Exception creating session", exception);
return;
}
shouldConfigureSession = true;
}
if (shouldConfigureSession) {
configureSession();
shouldConfigureSession = false;
arSceneView.setupSession(mSession);
}
}
private void onUpdateFrame(FrameTime frameTime) {
Frame frame = arSceneView.getArFrame();
Collection<AugmentedImage> updatedAugmentedImages =
frame.getUpdatedTrackables(AugmentedImage.class);
Log.d("size----", String.valueOf(updatedAugmentedImages.size()));
for (AugmentedImage augmentedImage : updatedAugmentedImages) {
if (augmentedImage.getTrackingState() == TrackingState.TRACKING) {
// Check camera image matches our reference image
if (augmentedImage.getName().contains("car")) {
if (!modelAdded) {
modelAdded = true;
Anchor anchor = augmentedImage.createAnchor(augmentedImage.getCenterPose());
AnchorNode anchorNode = new AnchorNode(anchor);
anchorNode.setParent(arFragment.getArSceneView().getScene());
// Create the transformable andy and add it to the anchor.
andy = new TransformableNode(arFragment.getTransformationSystem());
andy.setParent(anchorNode);
andy.setRenderable(andyRenderable);
andy.select();
}
}
}
}
}
private boolean setupAugmentedImageDb(Config config) {
AugmentedImageDatabase augmentedImageDatabase;
Bitmap augmentedImageBitmap = loadAugmentedImage();
if (augmentedImageBitmap == null) {
return false;
}
augmentedImageDatabase = new AugmentedImageDatabase(mSession);
augmentedImageDatabase.addImage("car", augmentedImageBitmap);
config.setAugmentedImageDatabase(augmentedImageDatabase);
return true;
}
private Bitmap loadAugmentedImage() {
try (InputStream is = getAssets().open("car.jpeg")) {
return BitmapFactory.decodeStream(is);
} catch (IOException e) {
Log.e(TAG, "IO exception loading augmented image bitmap.", e);
}
return null;
}
}