Coons surface

Ok, imagine you have a ball, like a basketball. Now imagine you want to cover that ball with a piece of stretchy fabric. It might be hard to get the fabric to fit perfectly over the ball, because the ball is round and the fabric is flat. But if you stretch the fabric really tightly, you can get it to fit pretty well.

Now, imagine doing this with a very complicated shape, like a car. It would be even harder to fit the fabric over all the different bumps and curves of the car.

That's where Coons surfaces come in. They're a way of taking a bunch of points on a complicated shape, and using those points to create a smooth, curved surface that fits the shape perfectly.

It's kind of like if you had a picture of a car that was made up of a bunch of dots. You could connect those dots with lines to create a drawing of the car. A Coons surface is like doing that, but with a bunch of points in 3D space, and creating a smooth surface that fits the shape of the points.

So, Coons surfaces are a way of creating a smooth, curved surface that fits a complicated shape, by using a bunch of points on the shape.