Sprites flicker in Andengine

Question

I want to move some sprites from left to right with a constant slow speed. I have first tried RatioResolutionPolicy but I saw sprites were flickering a lot. Then I have changed resolutionpolicy to FixedResolutionPolicy, defined sprite textures as bitmap, scaled them and made sprites by these textures (for more detail: click here). This is better than first method but not completely good. I use setx() for moving sprites. When I change x positon for example by 2 pixels for each frame there is no problem. But for different devices that have different resolutions I must multiply 2 by a ratio. In this case sprites are flickering again, not much but it is annoying for me.

post some code. How do you instantiate your camera? How exactly are you moving your sprites? — Łukasz Motyczka

Fatih ÇAKIR Fatih ÇAKIR · Accepted Answer · 2015-08-17T18:14:19

code for camera is below

@Override
public EngineOptions onCreateEngineOptions() {

    WindowManager w = getWindowManager();

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
        Point size = new Point();
        w.getDefaultDisplay().getSize(size);
        V.CAMERA_WIDTH = size.x;
        V.CAMERA_HEIGHT = size.y;
    } else {
        Display d = w.getDefaultDisplay();
        V.CAMERA_WIDTH = d.getWidth();
        V.CAMERA_HEIGHT = d.getHeight();
    }

    if (V.CAMERA_HEIGHT/V.CAMERA_WIDTH>480f/860f){
        V.CAMERA_HEIGHT=V.CAMERA_WIDTH*480f/860f;
    }

    else {
        V.CAMERA_WIDTH=V.CAMERA_HEIGHT*860f/480f;
    }

    V.ratio=V.CAMERA_HEIGHT/480f;

    this.mCamera = new Camera(0, 0, V.CAMERA_WIDTH, V.CAMERA_HEIGHT);
    final EngineOptions engineOptions = new EngineOptions(true,
            ScreenOrientation.LANDSCAPE_FIXED, new FixedResolutionPolicy((int)V.CAMERA_WIDTH, (int)V.CAMERA_HEIGHT),
            this.mCamera);

    return engineOptions;
}

for moving sprites:

this.wallPosX -= this.speed;

this.setX(Math.round(this.wallPosX));

speed is a floating point varibale and it gets 4.4651165 for 1280x720 screen resolution. If I set it as an integer than there is no flickering, but this time sprite speed differs from device to device.

Sprites flicker in Andengine

3 Answers