c++ 函数

@toc

1. 点旋转

    vector<Point> rot_pt(vector<Point> &v_pt,const cv::Mat &map_matrix)
    {
        //std::cout<<"map_matrix="<<map_matrix<<std::endl;
        float *map = (float *)map_matrix.ptr<float>();

        vector<Point> v_pt2src;
        for(int i=0;i<v_pt.size();i++)
        {
            //std::cout<<"src_pt="<<v_pt[i]<<std::endl;
            int x_t = v_pt[i].x;
            int y_t = v_pt[i].y;
            int x =  map[0]* x_t + map[1] * y_t + map[2];
            int y = map[3] * x_t + map[4] * y_t + map[5];
            v_pt2src.push_back(Point(x,y));
        }
        return v_pt2src;
    }

c++ 函数

原文：https://www.cnblogs.com/yanghailin/p/12067239.html