利用CvPoint的数组构建一个多边形

使用C++里面的vector容器

std::vector<CvPoint>

    std::vector<CvPoint> pts1, pts2;

    pts1.push_back(cvPoint(100, 10));
    pts1.push_back(cvPoint(10, 100));
    pts1.push_back(cvPoint(200, 200));

    pts2.push_back(cvPoint(100, 30));
    pts2.push_back(cvPoint(30, 100));
    pts2.push_back(cvPoint(150, 200));

    std::vector<CvPoint*> pts;

    pts.push_back(pts1.begin());
    pts.push_back(pts2.begin());

    std::vector<int> npts;

    npts.push_back(pts1.size());
    npts.push_back(pts2.size());

    cvPolyLine(image, pts.begin(), npts.begin(), npts.size(), 1, CV_RGB(0, 0, 255));

这段代码画出下面图里的两个三角形

参考自http://www.opencv.org.cn/forum/viewtopic.php?p=11749

chai2010