opengl APIdemo学习3

TouchRotateActivity

1、在activity中聚焦

mGLSurfaceView.requestFocus();
        mGLSurfaceView.setFocusableInTouchMode(true);

2、设置渲染模式

setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);

3、在GLSurfaceView的子类中，继承onTouchEvent方法

根据滑动，计算出x、y方向需旋转的角度，并要求重新渲染

    private final float TOUCH_SCALE_FACTOR = 180.0f / 320;
    @Override 
    public boolean onTouchEvent(MotionEvent e) {
        float x = e.getX();
        float y = e.getY();
        switch (e.getAction()) {
        case MotionEvent.ACTION_MOVE:
            float dx = x - mPreviousX;
            float dy = y - mPreviousY;
            mRenderer.mAngleX += dx * TOUCH_SCALE_FACTOR;
            mRenderer.mAngleY += dy * TOUCH_SCALE_FACTOR;
            requestRender();
        }
        mPreviousX = x;
        mPreviousY = y;
        return true;
    }

其他和上面每啥区别了