Okay, so imagine you have a toy car that you can spin around. If you want to know where the car is facing after you spin it, you need to use something called the Euler-Rodrigues formula.
This formula helps you figure out how to rotate things in 3D space. It's like a recipe that tells you how much to turn the toy car to make it face a certain way.
To use this formula, you need to know some things about the toy car, like its current position, the direction it's facing, and the amount you want to rotate it by.
Then, you can plug those numbers into the formula and it will give you the new position and direction of the toy car after you rotate it.
It sounds complicated, but it's really just a way to do some math to make the toy car go where you want it to go. It's like magic!