Challenges

Happy Pi Day 2024! In this video, I attempt to create an Apollonian Gasket using the Descartes Circle Theorem and complex numbers. So many circles!

Stippling is an artistic technique that uses numerous dots to craft an image. In this coding challenge I attempt to implement a weighted Voronoi stippling algorithm with p5.js along with the Delaunay triangulation package from d3.js.

It's Genuary 2024! Watch as I attempt to build a falling sand simulation in p5.js using a grid of pixels and simple rules.

How is nature hidden in a pile of 0s and 1s? Let's find out by coding a p5.js visualization of the Wolfram Elementary Cellular Automaton!

Learn to create your own climate spiral using p5.js and temperature data. Originally designed by the climate scientist Ed Hawkins, the climate spiral is a visual representation of the changing temperatures over time, illustrating the urgent need to address climate change.

Embark on a squishy adventure as I attempt to create a soft body physics simulation for a character with toxiclibs.js and p5.js!

How do toothpicks approximate the value of pi? I'll show you by coding a simulation in p5.js!

This project is a collaboration with Grady Hillhouse at the Practical Engineering YouTube channel. This is my attempt to code a simulation of Horizontal Directional Drilling, laparoscopic surgery for the earth!

Straight out of quantum mechanics, Wave Function Collapse is an algorithm for procedural generation of images. In this video (recorded over 3 live streams) I attempt the tiled model and explore a variety of solutions to the algorithm in JavaScript with p5.js. Also, check out WFC's predecessor: Model Synthesis (more info below).

It's the Monty Hall Problem! In JavaScript! With p5.js! Yes, you really double your chances of winning by switching doors. I hope to convince you of this in this video!

Happy Pi Day! How many delicious digits of Pi can you catch from the sky? In JavaScript!

Why do prime numbers show up as diagonals in a spiral? In this video, I create a visualization in JavaScript (p5.js) of the Ulam Spiral (aka Prime Spiral) named for Polish Mathematician Stanislav Ulan.

Let's make ASCII art in p5.js together! In this video, I demonstrate a variety of techniques for translating the pixels of an image into text and finish with rendering video as text ASCII characters in a DOM.

Let's make a slide puzzle in p5.js together! We'll be using images, nested loops, and arrays, and by the end of our journey, we'll have a fully playable game!

Have you ever wanted to know more about bézier curves in p5.js? Thanks to a generous donation from Jason Oswald, I do a deep dive exploring the bézier curve function and the math behind the algorithm?

It's finally time to attempt a Self-Avoiding Walk! In this video, I quickly visualize a simple JavaScript p5.js implementation of a self-avoiding walk. I then tackle the more complex problem of backtracking to find a solution to a space-filling self-avoiding walk.

🥧 Happy Pi Day 2021! This year I estimate the digits of π with random numbers and the probability of two integers being co-prime.

Boing! Time to simulate a spring force! This challenge fits into chapters 2 and 3 of the Nature of Code and demonstrates how to simulate the oscillating motion of a spring using vectors and forces.

Choo choo! In this challenge, I build on chapter 3 (Oscillating Motion) of the Nature of Code series and simulate a simple pendulum in p5.js via angular acceleration.

Liven up your video calls with p5.js, ml5.js, Teachable Machine, and OBS Studio!

🥧 Happy Pi Day 2020! In this challenge, I build a simple web application using p5.js and node.js to search in the first billion digits of Pi.

Happy holidays! #SupportP5! This video shows an attempt to make a snowflake from a "kaleidoscope painting" effect.

In this challenge I take the Tic Tac Toe game from coding challenge #149 and add an AI opponent for a human player by implenenting the Minimax algorithm.

In this challenge, I attempt to create a Ukulele tuner in JavaScript using p5.js, ml5.js and the pre-trained machine learning model CREPE: A Convolutional REpresentation for Pitch Estimation. Can you make one with a more elegant and creative interface?

In this coding challenge, I implement the “Gift Wrapping algorithm” (aka Jarvis march) for calculating a convex hull in JavaScript. This is a foundational topic in computational geometry!

Inspired by the recent image of the Powehi m87 black hole from the Event Horizon Telescope, I visualize the behavior or light (photons) following the path of spacetime around the black hole in p5.js.

Let's try implementing a famously faster sorting algorithm: the Quicksort! And visualize the process with p5.js!

In this coding challenge, I use the Leibniz formula (aka infinite series) to approximate the digits of Pi and graph the convergence.

Happy Pi Day! To celebrate I attempt to compute the digits of Pi using the “collisions” method, thanks to 3Blue1Brown for the idea!

An attempt to implement the basic mechanics of Angry Birds in JavaScript using p5.js and the matter.js physics engine.

It’s groundhog day on the coding train as I demonstrate another noise loop GIF technique, this time with 4D OpenSimplex Noise in Processing (Java).

In this coding challenge, I simulate the “Bouncing DVD Logo” meme in JavaScript with p5.js.

In this coding challenge, I implement the Discrete Fourier Transform algorithm in JavaScript and render a drawing using epicycles derived from the transform.

In this coding challenge, I visualize a Fourier series for a square wave in JavaScript with p5.js.

In this multi-part coding challenge, I visualize the "Chaos Game".

In this multi-part coding challenge, I take a closer look at the Quick, Draw! dataset and create a simple node API to "replay" drawings of rainbows and cats using p5.js.

In this coding challenge, I discuss turtle graphics and make a Logo Interpreter in JavaScript.

In this coding challenge, I talk about bitwise operations, and more specifically, bit shifting.

This coding challenge is an exploration of binary numbers with p5.js. Watch me build an interactive sketch that converts binary to decimal numbers!

In this coding challenge, I create a Seven-Segment Display with the p5.js library.

Snake Game!? Again!? Now with the p5.js Web Editor!

In this coding challenge, I load a sprite sheet and create multiple animated sprites with the p5.js library.

In this coding challenge, I visualize the Recamán’s number sequence using the p5.js library and go on to generate a series of musical tones using p5.js sound.

Celebrating the 500,000 subscribers milestone, I create a map visualization of Coding Train subscriber locations around the world!

Visualizing the Barnsley Fern fractal with Processing (Java)!

In this coding challenge, I visualize the outputs of a neural network solving XOR using TensorFlow.js.

In this challenge, I expand the linear example into polynomial regression!

In this challenge, I use my JavaScript neural network library and a genetic algorithm to train an agent to play Flappy Bird.

In this coding challenge, I use my neural network JavaScript library to create a "color predictor."

In this multi-part coding challenge, I implement a Quadtree data structure in JavaScript and visualize it with p5.js.