title: How can I apply a transformation matrix to a point in OpenCV?
body: <p>Suppose I have a transformation matrix <code>Mat</code> <code>tr</code> that I got from <code>getAffineTransform()</code> and a <code>Point2d</code> <code>p</code>. I want the point that is the result of warping <code>p</code> with <code>tr</code>. Does OpenCV provide a way of doing this?</p>