harmonic-motion-symphony

A JavaScript and Canvas app, that combines simple pendulum physics with Sound.

It simulates the pendulum motion using a modified SHM (Simple Harmonic Motion) model, that includes weight and dumping in the equation.

Each time the Pendulum crosses the middle point (aka the x coordinate of the origin) a note is played. This creates interesting possibilities for music generation.

The goal of the project was to be as minimal as possible, hence the use of pure JavaScript with no dependencies, the Web Audio Api, and HTML5 Canvas.

In order to keep the code clean, I separated into es6-modules, which unfortunately means that I needed to add a build step, using rollup and swc.

In order to run the app, download or clone the project, run the commands:

npm install
npm run build

, and then, open up index.html with a web browser of your choice. (The audio might have some glitches when a note finishes on the FireFox browser)

Inspiration Credits: Lucid Rhythms - "Space Pendulum" When I watched that video I knew I HAD to implement it.

TODO

• Create a functional prototype
• Implement a game menu
  • NEW GAME
  • RESUME
  • RESET
  • SETTINGS
• Add user interactivity
  • Select a pendulum
  • Change properties of the pendulum
  • Add pendulums
  • Remove pendulums
  • Drag a pendulum while the simulation is running
• Implement the AudioSource class: - host multiple oscillators, - add ADSR envelop - add detuning
• Update the classes docs
• Implement a glow halo effect for the pendulum weight, when it plays a note