There is a certain figure. Suppose a rectangle. He has 4 points.
There is a matrix (2d). According to which you need to transform the figure.
Task: find the new coordinates of each point.
PS Thank you for your understanding, I am not a student at all. And the answer I need is not in order to answer, but really in practice. The solution is generally there, but it turns out garbage. So I wanted to see what was offered and compare with my ... Thank you very much, Hashcode users.