// 30/ 09/ 2023

// By Lukrecija Paulikaite

// Music downloaded from:

// https://www.chosic.com/download-audio/25899/

​

let song;

let particles = [];

​

let numRows = 6; 

let numCols = 6; 

​

​

function preload() {

  song = loadSound("classical.mp3"); 

}

​

function setup() {

  createCanvas(windowWidth,windowHeight);

  background(0);

  song.play(); 

  let spacingX = width / numCols;

  let spacingY = height / numRows;

  // initially displaying particles on a grid

  for (let row = 0; row < numRows; row++) {

    for (let col = 0; col < numCols; col++) {

      let x = spacingX * col + spacingX / 2;

      let y = spacingY * row + spacingY / 2;

      particles.push(new Particle(x, y));

    }

  }

​

}

function draw() {

  background(0, 10);

​

  // looping through all the particles

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

    let particleA = particles[i];

    particleA.update();

    particleA.display();

​

    // initializing an inner loop to compare the current particle to other particles and calculating distances

    for (let j = i + 1; j < particles.length; j++) {

      let particleB = particles[j];

      let distance = dist(

        particleA.position.x,

        particleA.position.y,

        particleB.position.x,

        particleB.position.y

      );

​

      // drawing a line between particles that are closer than 100 pixels

      if (distance < 100) {

        line(

          particleA.position.x,

          particleA.position.y,

          particleB.position.x,

          particleB.position.y

        );

      }

    }

  }

}

​

​