let mass = 25;

let a = 360;

let song;

let waveform;

​

function preload() {

  song = loadSound("music/yookai.mp3");

}

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  // background(255);

  angleMode(DEGREES);

  for (let i = 0; i < 10; i++) {

    let m = mass;

    let x = m * cos(a);

    let y = m * sin(a);

    particle[i] = new Particle(x, y, m);

  }

​

  fft = new p5.FFT();

  song.amp(1);

}

​

function draw() {

  background(0);

​

  waveform = fft.waveform();

​

  fft.analyze();

  let low = fft.getEnergy("bass");

  let mid = fft.getEnergy("mid");

  let high = fft.getEnergy("treble");

​

  translate(width / 2, height / 2);

​

  for (let p of particle) {

    for (let other of particle) {

      if (p != other) {

        p.attract(other);

        /* waveform loop */

        for (let w = 0; w < waveform.length; w++) {

          p.pos.setMag(waveform[w] * 300);

        }

        strokeWeight(1);

        /* incorporate low-mid-high */

        stroke(low, mid, high);

        let d = dist(p.pos.x, p.pos.y, other.pos.x, other.pos.y);

​

        if (d > 100 && d < 150) {

          /* draw triangle */

          // noStroke();

          fill(p.colAlpha);

          triangle(p.pos.x, p.pos.y, other.pos.x, other.pos.y, 0, 0);

          /* draw lines */

          // stroke(p.colAlpha);

          // line(p.pos.x, p.pos.y, other.pos.x, other.pos.y);

        }

      }

    }

  }

​

  for (let p of particle) {

    p.show();

    p.update();

  }

}

​

function mouseClicked() {

  if (song.isPlaying()) {

    song.pause();

  } else {

    song.loop();

  }

}

​