I am making one algorithm a day, and didn't make to finish this one recently.
I have a set of points that i draw, and now I'd like to chose pairs to draw lines between them so that when it's done they will form a convex hull.
My idea was to start from the one that has the lowest y- coordinate, and then go in CCW order, but I am not sure how to write a good algorithm for choosing the pairs.
This question is in fact very simple, it's just me who is a beginner :)
Have you tried using the Graham scan algorithm? It actually uses coordinate-sorting and CW order.