Instant Tracker Android Tutorial
1. Overview
2. Android Development
2.1 Hardware Requirements for Android
2.2 Start / Stop Tracker
2.3 Use Tracking Information
2.4 Create Instant Target Data
3. Reference
3.1 API Reference
3.2 Sample
1. Overview
Start developing MAXST ARSDK Instant Tracker on Android Platform. Refer to Instant Tracker Introduction for detailed information.
Refer to Tracker Coordinate System to better understand 3D coordinate system of Instant Tracker.
Prerequisites |
---|
Instant Tracker Introduction |
Tracker Coordinate System |
2.Android Development
Start developing on Android Studio using Java. refer to Requirements & Supports to find out which devices are supported.
ARSDK has to properly integrate on Android Activity. Refer to Life Cycle documents for detail.
2.1 Hardware Requirements for Android
MAXST AR SDK's Instant Tracker uses internally Android Rotation Vector related to both gyro and compass sensors.
If your target device has no gyro or compass sensor, the engine can not find the initial pose. If there is no sensor value, our engine assumes the front scene as a ground plane.
If you want to check whether the current device support Android Rotation Vector, please refer to the following codes.
SensorManager mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE); List<Sensor> sensors = mSensorManager.getSensorList(TYPE_ROTATION_VECTOR); Log.i(TAG, "# sensor : " + sensors.size()); for(int i=0; i<sensors.size(); i++) { Log.i(TAG, sensors.get(i).getName()); } if(sensors.isEmpty()) { Log.i(TAG,"There is no Rotaion Vector"); }
※Devices that do not support the Android Rotation Vector
- Samsung Galaxy J5
- Moto G5 Plus
- Moto G4 Plus
- Iball Andi 5U
- Geonee S +
2.2 Start / Stop Tracker
To start / stop the tracker, refer to the following code.
※ To change the tracker, destroyTracker() should be called before
@Override protected void onResume() { ... TrackerManager.getInstance().startTracker(TrackerManager.TRACKER_TYPE_INSTANT); ... } @Override protected void onPause() { ... TrackerManager.getInstance().stopTracker(); ... }
2.3 Use Tracking Information
To augment an object using tracking results, refer to the following code.
※ startTracker() should be called before
public void onDrawFrame(GL10 unused) { ... TrackingState state = TrackerManager.GetInstance().UpdateTrackingState(); TrackingResult trackingResult = state.GetTrackingResult(); ... if (trackingResult.getCount() == 0) { return; } ... Trackable trackable = trackingResult.getTrackable(0); GLES20.glEnable(GLES20.GL_DEPTH_TEST); texturedCube.setTransform(trackable.getPoseMatrix()); texturedCube.setTranslate(posX, posY, -0.05f); texturedCube.setProjectionMatrix(projectionMatrix); texturedCube.draw(); }
2.4 Create Instant Target Data
You can create new data only when it is not in tracking state. Refer to the following code.
@Override public void onClick(View v) { switch (v.getId()) { case R.id.start_tracking: String text = startTrackingButton.getText().toString(); if (text.equals(getResources().getString(R.string.start_tracking))) { TrackerManager.getInstance().findSurface(); instantImageTargetRenderer.resetPosition(); startTrackingButton.setText(getResources().getString(R.string.stop_tracking)); } else { TrackerManager.getInstance().quitFindingSurface(); startTrackingButton.setText(getResources().getString(R.string.start_tracking)); } break; } }
3. References
These are additional references to develop Instant Tracker
3.1 API Reference
Following documents explain classes and functions used to run Instant Tracker.
3.2 Sample
For information regarding sample build and run of Instant Tracker, refer to Sample