title: How to apply the OpenCV-function polylines() to lists in C++
body: <p>I have a result like this <code>std::list&lt;std::list&lt;cv::Point2i&gt;&gt;</code> and I would like to visualize the result using <code>polylines()</code> and <code>imshow()</code>. Is there a way to realize this without having to copy the list elements to vectors? </p>