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我的程序是在触摸屏幕时出现一个白色方块并沿 za 轴移动。

我的目标和问题是，我还希望在一次又一次地触摸屏幕时再次发生这种情况。

出于某种原因添加 invalidate(); square.draw 后不起作用。我还尝试在活动类中创建一个线程来锁定和解锁画布。我不太确定我在做什么，如果有人能指出我正确的方向，那就太好了！

这是我的活动课程中的 GLRendering 课程

public class GL1Activity extends Activity implements OnTouchListener {

GLSurfaceView ourSurface;
float x,y;



@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
    ourSurface = new GLSurfaceView(this);
    ourSurface.setOnTouchListener(this);
    x=0;
    y=0;
    ourSurface.setRenderer(new GL1Renderer()); //links to GL1Renderer
    setContentView(ourSurface);

}

@Override
protected void onPause() {
    // TODO Auto-generated method stub
    super.onPause();
    ourSurface.onPause();
}

@Override
protected void onResume() {
    // TODO Auto-generated method stub
    super.onResume();
    ourSurface.onResume();

    }


@Override
public boolean onTouch(View v, MotionEvent event) {
    // TODO Auto-generated method stub
    x = event.getX();
    y = event.getY();

    return false;
} 

public class GL1Renderer implements Renderer {

    private GL1Square square;
    float zoomz;
    public GL1Renderer (){
        square = new GL1Square();
    }

    @Override
    public void onSurfaceCreated(GL10 gl, EGLConfig eglconfig) {
        // TODO Auto-generated method stub
    gl.glDisable(GL10.GL_DITHER);
    gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT, GL10.GL_FASTEST);
    gl.glClearColor(.1f, .1f, .1f, 1); //painting background
    gl.glClearDepthf(1f);

    }

    @Override
    public void onDrawFrame(GL10 gl) {
        // TODO Auto-generated method stub
        gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);

        gl.glMatrixMode(GL10.GL_MODELVIEW);
        gl.glLoadIdentity();
        GLU.gluLookAt(gl, 0, 0, -5, 0, 0, 0, 0, 3, 0);
        if (x != 0 && y != 0){  
        gl.glTranslatef(0, 0, zoomz);
        if (zoomz < 50) {
            zoomz-=.1;      
        }
        if (zoomz > 50){
            zoomz = 0;
        }
        square.draw(gl);

        };
    }

    @Override
    public void onSurfaceChanged(GL10 gl, int width, int height) {
        // TODO Auto-generated method stub
        gl.glViewport(0, 0, width, height);
        float ratio = (float) width/height;
        gl.glMatrixMode(GL10.GL_PROJECTION);
        gl.glLoadIdentity();
        gl.glFrustumf(-ratio, ratio, -1, 1, 1, 25); 
        }
    }

这是方码；

public class GL1Square {

private float vertices[] = {
        -1.0f, 1.0f,
        1.0f, 1.0f,
        1.0f, -1.0f,
        -1.0f, -1.0f,
};
private short[] pIndex = { 0, 1, 2, 0, 2, 3};

private ShortBuffer pBuff;

private FloatBuffer vertBuff;

public GL1Square(){
    ByteBuffer bBuff = ByteBuffer.allocateDirect(vertices.length * 4);
    bBuff.order(ByteOrder.nativeOrder());
    vertBuff = bBuff.asFloatBuffer();
    vertBuff.put(vertices);
    vertBuff.position(0);

    ByteBuffer pbBuff = ByteBuffer.allocateDirect(pIndex.length * 2);
    pbBuff.order(ByteOrder.nativeOrder());
    pBuff = pbBuff.asShortBuffer();
    pBuff.put(pIndex);
    pBuff.position(0);
}

public void draw(GL10 gl){
    gl.glFrontFace(GL10.GL_CW);
    gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
    gl.glEnable(GL10.GL_CULL_FACE);
    gl.glCullFace(GL10.GL_FRONT);
    gl.glVertexPointer(2, GL10.GL_FLOAT, 0, vertBuff);
    gl.glDrawElements(GL10.GL_TRIANGLES, pIndex.length, GL10.GL_UNSIGNED_SHORT, pBuff);
    gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
    gl.glDisable(GL10.GL_CULL_FACE);
}

问候

4

1 回答 1

0

也许尝试从您的 Activity 类中调用 onDrawFrame() ...？无论如何，根据我的理解，这将重新绘制框架。

于 2013-06-08T03:35:13.523 回答