Doubly connected edge list

Okay kiddo, let's talk about a special way to draw pictures called a doubly connected edge list. Imagine you have a coloring book with different shapes to fill in. Now, each shape has edges or lines that outline it. These edges can connect to other shapes or other edges.

A doubly connected edge list is a way to keep track of all these edges and how they are connected to each other. It's like a map of the shapes and their edges.

Imagine taking a pencil and tracing the outline of each shape in the coloring book, going from one edge to the next. Each time you come to a corner or intersection, you draw a dot or mark it in some way to show that there is a connection there.

Now, you can take this map or list of dots and lines and use it to help you color in the shapes. You know which edges are connected to each other, so you can color them in the same color or make sure they touch properly.

It's really helpful to have a doubly connected edge list when you are working with complex shapes or drawings, because it helps you keep track of all the different edges and how they fit together. Plus, it's pretty cool to see all the connections and patterns!