在CvSeq中推送CvMat类型的元素

Question

我在这里试图创建一个将CvMat作为其元素的序列。我编写的代码与

相同

  for(CvSeq *c = first_contour;c!=NULL;c = c->h_next)
   {
    //New Seq created for each component seq in first_contour
    CvSeq * newSeq = cvCreateSeq(0,sizeof(CvSeq),sizeof(CvMat),storage);

    cvDrawContours(iOriginal,c,red,green,0,2,8);
    //Printing the contour no.
    printf("Contour == %d\n",nTmp);

    cvShowImage("Countour Information",iOriginal);

    //Printing the total no of elements in each sequence
    printf("%d Elements",c->total);

    //Creating a matrix with the dimension (total by 2)
    CvMat * matBoundary = cvCreateMat(c->total,2,CV_64FC1);

    //Iterating thru each seq to access its elements and setting it to matrix      matBoundary
    for(int i =0 ;i<c->total;i++)
    {
        CvPoint * p = CV_GET_SEQ_ELEM(CvPoint,c,i);
        cvmSet(matBoundary,i,0,p->x);
        cvmSet(matBoundary,i,1,p->y);
        printf("(%d,%d)\n",p->x,p->y);
    }
    //Pushing new matrix's address in newSeq
    cvSeqPush(newSeq,&matBoundary);

    //Checking the contents of boundary mat
    //for(CvSeq * s = boundarySeq;s!=NULL;s = s->h_next)
    //{
        CvMat * mat = CV_GET_SEQ_ELEM(CvMat,newSeq,1);
        for(int i = 0;i<mat->rows;i++)
        {   
            int x = cvmGet(mat,i,0);
            int y = cvmGet(mat,i,0);
            printf("x=%d y=%d",x,y);
        }

任何人都能告诉我这是什么问题，因为我在'newSeq'中什么也没得到。