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Active Matter Simulation

The model uses Viscek's model of self-propelled particles. Generating "bird like" agents or boids that behave like a flock of birds or school of fish.

Parameters:

  1. velocity: speed in which the boids traverse the universe.
  2. noise: random movement or "mistakes" boids make when evaluating the direction of motion of their neighbors.
  3. boxSize: Universe which the boids can travel and are confined to.
  4. interactionRadius: Distance in which another boid is considered a neighbor. Perception or sight of the boid.
  5. boidNumber: amount of boids to populate the simulation.
  6. boidSize: size of the boids on the simulation.

The model is based on the following rules:

  1. Each boid has a position, velocity, and perception radius.
  2. If the distance between two boids is less than a certain threshold (our interactionRadius), then the boids are considered neighbors.
  3. Boids will match their direction towards the average direction of their neighbors.

My Implementation

This project was developed without any sort of libraries or imports (js, css).

Some of the unique features of my implementation are:

  • The ability to change the parameters of the simulation in real time using the GUI and keybindings.
  • Unique spawn positions. (forming spirals, circles, grids and other patterns).
  • Different color options to create unique visualizations. (color depending on direction, position, time, neighbors, etc.).
  • Boids can start forming a custom letter or phrase.
  • Boids can either travel the universe borders or be confined to the borders.
  • Boids can follow the current mouse position.
  • Boids can leave a trail behind them (creating cool patterns).
  • Boids can be either circles or triangles.

Cool Examples

boids-viscek-compressed.mp4