Mine's a lot more complicated than that because, when I started to build it, I didn't have time to make the design simple.
Here's my latest "doodle."
The double-ender is a single chine with some rocker. Nominally 10 feet full size, but by cutting it off and putting in transom bows and sterns, can be any size you like.
Not ready for prime time, but a fun project when I was on "dog watch" when the missus and her folks went on a short trip.
The little guy is a skiff I made form a business card.