Gain insights into game development with JavaScript. Delve into graphics, game loops, and collision detection by creating Tetris. Showcase your skills with a fully functioning game.

In this course, you will get hands-on game development experience with JavaScript. Using the classic game of Tetris, you are going to cover concepts like graphics, game loops, and collision detection. 

By the end of this course, we will have a fully functioning game with points and levels. Try it out with your friends and put it in your portfolio for employers to see.

Game Development with JavaScript: Creating Tetris

Now we can move around, but to make it more fun, let's make the piece rotate. This is what the different stages of rotation should look like:

As with most components of this game, there are a few ways we could go about solving this challenge. We could, for example, have all the different variations of matrices defined and loop through them. However, this would require a lot of boilerplate code, so let's not take that route this time.

# Linear algebra

Instead, there is a mathematical formula in the linear algebra branch of mathematics that we can use. The 
[rotation matrix](https://en.wikipedia.org/wiki/Rotation_matrix) is a transformation matrix that is used to perform a rotation:

> _Two reflections can accomplish a rotation by 90 degrees at a 45-degree angle, so you can take the transpose of the matrix and multiply it by the permutation matrix that reverses the order of the columns._

In this lesson, we will explore how we can use math to rotate tetrominoes.

Course Overview

Modern JavaScript

Getting Started With Tetris

Moving Pieces

Game Logic

Gamification

Asynchronous JavaScript

Final Words

Rotation

Linear algebra