How to rotate GLSurfaceView?

Question

I try to use setRotation() on my GLSurfaceView, but the view seems not rotate around the pivot which is the center of the screen. the code like below:

class MyGLSurfaceView extends GLSurfaceView {
    private float mCurRotation = 0.0f;

    @Override
    public boolean onTouchEvent(MotionEvent e) {
        mCurRotation = mCurRotation + 10;
        setRotation(mCurRotation);
    }
}

Is there any body know the reason and teach me how to rotate my GLSurfaceView?

Here is posted a good answer on how to make it using OpenGL: https://stackoverflow.com/questions/36703984/rotating-android-camera-preview-by-90-degrees-on-glsurfaceview-using-opengl-2-0 — Zuum Dj, Nov 29 '17 at 12:44

score 2 · Accepted Answer · answered Jul 11 '13 at 10:45

2

Contrary to your expectation, methods of View doesn't work well.

GLSurfaceView punches a hole to display underneath surface. Actually it has only transparent pixels.

If you want to rotate your image, you have to use OpenGL operations.

answered Jul 11 '13 at 10:45

Dalinaum

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1

thanks a lot, actually we use opengl to solve the problem finally. – leoncheng Aug 06 '13 at 07:56
3

can you post how you solved the problem I am in same problem. – Kirtan Nov 19 '13 at 05:23

How to rotate GLSurfaceView?

1 Answers1