Repulsion

/*

Repulsion

​

jasonlabbe3d.com

twitter.com/russetPotato

*/

​

var count = 500;

var spacing = 6;

var repulsionRadius = 100;

var particles = [];

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  colorMode(HSB, 255);

  for (let i = 0; i < count; i++) {

    let angle = i * 137.5;

    let r = spacing * sqrt(i);

    let x = r * cos(radians(angle)) + width / 2;

    let y = r * sin(radians(angle)) + height / 2;

    let distToCenter = dist(x, y, width / 2, height / 2);

    let s = 255 - distToCenter * 1.25;

    let b = 150 + distToCenter * 1;

    particles.push(new Particle(

      random(width), -200, 

      x, y, 

      0.5,

      s, b));

  }

} 

​

function draw() {

  background(50);

  for (let i = 0; i < particles.length; i++) {

    particles[i].move();

    particles[i].display();

  }

  stroke(0, 50);

  strokeWeight(repulsionRadius * 2);

  point(mouseX, mouseY);

}