Problem on GVRTextViewSceneObject about gearvrf

[chenchao1407]

I will take a look at that later.

Do you mind sending your test sample to me? My email address is [email protected]

[JonShemitz]

Yes, please do send along test code - I did a quick smoke test, and saw no flickering:

GVRTextViewSceneObject sceneObject, sceneObject2;

/* snip */

@Override
public void onInit(GVRContext gvrContext) {
    GVRScene nextMainScene = gvrContext.getNextMainScene();

    sceneObject = new GVRTextViewSceneObject(gvrContext, mActivity);
    textSize = sceneObject.getTextSize();

    sceneObject2 = new GVRTextViewSceneObject(gvrContext, mActivity);

    // set the scene object position
    sceneObject.getTransform().setPosition(0.0f, 0.0f, -2.0f);
    sceneObject2.getTransform().setPosition(0.1f, 0.1f, -1.0f);

    // add the scene object to the scene graph
    nextMainScene.addSceneObject(sceneObject);
    nextMainScene.addSceneObject(sceneObject2);

    sceneObject2.setText("scene object 2");
}

[nathanalmeida]

I've sent the code to chen`s email

[chenchao1407]

Hi Nathan

I tested with your codes and I don't see the view flickering. Can you tell me what device you used to test? Is it Qualcomm chipset(adreno) or Samsung chipset(mali)?

[nathanalmeida]

It is a Qualcomm.

It's the scene objects that flick when we keep moving our head. Have you run the sample in Oculus?

[chenchao1407]

Yeah. I still can't see flickering or blinking. What is your android version?

Thanks in advance.

[nathanalmeida]

My android version is 5.0.1

I am using a note 4, but I noticed that on S6 it is harder to notice this with only 2 GVRTextViewSceneObjects. Please change the sample code I sent to:

for (int i = 0; i < 5; i++) {
...

It is easier to see it when there are more objects in scene.

Now with more objects, they are also blinking.

[chenchao1407]

Hi.
We just found there are two side effects we can see in your sample. One is because that in your sample, every GVRTextViewSceneObject has the same Z-value and they are overlapping with each other so there will be kind of Z-offer fighting effect. Actually all 2-D SceneObjects will trigger such effect in that case and I am not quite sure if it is a bug.

Another thing we can see is like flickering while moving head, maybe it is what you talked about. It is caused by the bad performance of SurfaceTexture and I just make a work around patch. Maybe you can take a look at it #134