Quadtree

Imagine you have a big piece of paper with a picture of a forest. In the forest, there are trees, animals and plants. A quadtree is like cutting the piece of paper into smaller pieces so that you can focus on what's in each smaller section.

You start by dividing the big piece of paper into four equal parts, just like cutting a pizza into four slices. Now, you have four smaller sections. You can do this again and again, creating smaller and smaller sections, until you have a small enough section that only has one thing in it, like one tree or animal.

This helps you look at each part of the picture in more detail. If you wanted to find all the animals in the picture, you can check each small section to see if there's an animal there, instead of looking at the whole forest at once.

The quadtree makes it easier to find things because you can split the picture into smaller sections until you find what you're looking for. It's like having a map of the forest where you can zoom in and see all the details, without getting lost in the big picture.