현재 카메라 위에 큐브를 올려놓았습니다.

Api Demo에 있는 CameraPreview와 TouchRotateActivity를 함께 사용해서

카메라 위에 큐브를 올려놓았습니다..

근데 문제는..

큐브가 가운데로 나오는게 아니라.. 옆부분으로 가 있네요...
그리고 한개 짜리가 아니라 두개로 해서 나오고요..

왜그런지 잘 몰라서..
질문합니다...

package com.androidhuman.example.CameraPreview;

import java.io.IOException;

import javax.microedition.khronos.egl.EGLConfig;
import javax.microedition.khronos.opengles.GL10;

import android.app.Activity;
import android.content.Context;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.opengl.GLSurfaceView;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.ViewGroup.LayoutParams;
import android.view.Window;


public class CameraPreview extends Activity {  
 private GLSurfaceView mGLSurfaceView;

    @Override
 protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
       
        // Hide the window title.
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        //this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
        Preview mPreview = new Preview(this);
       
        // Create our Preview view and set it as the content of our
        // Activity
        mGLSurfaceView = new TouchSurfaceView(this);
        setContentView(mGLSurfaceView);
        mGLSurfaceView.requestFocus();
        mGLSurfaceView.setFocusableInTouchMode(true);
       
        //OpenGL 먼저 표시하기
        setContentView(mGLSurfaceView);

        //그 다음 카메라 표시하기
        addContentView(mPreview, new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
    }
   
    @Override
    protected void onResume() {
        // Ideally a game should implement onResume() and onPause()
        // to take appropriate action when the activity looses focus
        super.onResume();
        mGLSurfaceView.onResume();
    }

    @Override
    protected void onPause() {
        // Ideally a game should implement onResume() and onPause()
        // to take appropriate action when the activity looses focus
        super.onPause();
        mGLSurfaceView.onPause();
    }
}

class TouchSurfaceView extends GLSurfaceView {
 private final float TOUCH_SCALE_FACTOR = 180.0f / 320;
    private final float TRACKBALL_SCALE_FACTOR = 36.0f;
 private CubeRenderer mRenderer;
    private float mPreviousX;
    private float mPreviousY;
    
    public TouchSurfaceView(Context context) {
        super(context);
        mRenderer = new CubeRenderer(true);
        setEGLConfigChooser(8, 8, 8, 8, 16, 0);
        getHolder().setFormat(PixelFormat.RGBA_8888);
        setRenderer(mRenderer);
        setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);
    }

    @Override public boolean onTrackballEvent(MotionEvent e) {
        mRenderer.mAngleX += e.getX() * TRACKBALL_SCALE_FACTOR;
        mRenderer.mAngleY += e.getY() * TRACKBALL_SCALE_FACTOR;
        requestRender();
        return true;
    }

    @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;
    }

    /**
     * Render a cube.
     */
    private class CubeRenderer implements GLSurfaceView.Renderer {
     private Cube mCube;
        public float mAngleX;
        public float mAngleY;
        private boolean mTranslucentBackground;
       
       
        public CubeRenderer(boolean useTranslucentBackground) {
            mTranslucentBackground = useTranslucentBackground;
            mCube = new Cube();
        }

        public void onDrawFrame(GL10 gl) {
            /*
             * Usually, the first thing one might want to do is to clear
             * the screen. The most efficient way of doing this is to use
             * glClear().
             */

            gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);

            /*
             * Now we're ready to draw some 3D objects
             */

            gl.glMatrixMode(GL10.GL_MODELVIEW);
            gl.glLoadIdentity();
            gl.glTranslatef(0, 0, -3.0f);
            gl.glRotatef(mAngleX, 0, 1, 0);
            gl.glRotatef(mAngleY, 1, 0, 0);

            gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
            gl.glEnableClientState(GL10.GL_COLOR_ARRAY);

            mCube.draw(gl);
        }

        public void onSurfaceChanged(GL10 gl, int width, int height) {
             gl.glViewport(0, 0, width, height);

             /*
              * Set our projection matrix. This doesn't have to be done
              * each time we draw, but usually a new projection needs to
              * be set when the viewport is resized.
              */

             float ratio = (float) width / height;
             gl.glMatrixMode(GL10.GL_PROJECTION);
             gl.glLoadIdentity();
             gl.glFrustumf(-ratio, ratio, -1, 1, 1, 10);
        }

        public void onSurfaceCreated(GL10 gl, EGLConfig config) {
            /*
             * By default, OpenGL enables features that improve quality
             * but reduce performance. One might want to tweak that
             * especially on software renderer.
             */
            gl.glDisable(GL10.GL_DITHER);

            /*
             * Some one-time OpenGL initialization can be made here
             * probably based on features of this particular context
             */
             gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT,
                     GL10.GL_FASTEST);

             if (mTranslucentBackground) {
                 gl.glClearColor(0,0,0,0);
             } else {
                 gl.glClearColor(1,1,1,1);
             }
             gl.glEnable(GL10.GL_CULL_FACE);
             gl.glShadeModel(GL10.GL_SMOOTH);
             gl.glEnable(GL10.GL_DEPTH_TEST);
        }
    }
}
class Preview extends SurfaceView implements SurfaceHolder.Callback {
    SurfaceHolder mHolder;
    Camera mCamera;
    CameraPreview app;
   
    Preview(Context context) {
        super(context);
       
        app = (CameraPreview) context;
       
        // SurfaceHolder.Callback을 설정함으로써 Surface가 생성/소멸되었음을
        // 알 수 있습니다.
        mHolder = getHolder();
        mHolder.addCallback(this);
        mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);       
    }

    public void surfaceCreated(SurfaceHolder holder) {
        // Surface가 생성되었다면, 카메라의 인스턴스를 받아온 후 카메라의
        // Preview 를 표시할 위치를 설정합니다.
        mCamera = Camera.open();
        try {
           mCamera.setPreviewDisplay(holder);
        } catch (IOException exception) {
            mCamera.release();
            mCamera = null;
            // TODO: add more exception handling logic here
        }
    }

    public void surfaceDestroyed(SurfaceHolder holder) {
     // 화면에 표시가 되지 않으면 Surface가 소멸되며 카메라의 Preview도 중지하며 사용하지 않을 경우
  // 액티비티가 일시 정지 상태가 된 경우 등, 자원을 반환
  try {
   if (mCamera != null) {
    try {
     mCamera.stopPreview();
    } catch (Exception ignore) {
    }
    try {
     mCamera.release();
    } catch (Exception ignore) {
    }
    mCamera = null;
   }
  } catch (Exception ex) {
   ex.printStackTrace();
  }
    }

    public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
        // 표시할 영역의 크기를 알았으므로 해당 크기로 Preview를 시작합니다.
        Camera.Parameters parameters = mCamera.getParameters();
        //parameters.setPreviewSize(w, h);
        mCamera.setParameters(parameters);
        mCamera.startPreview();
    }
}

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