​

function setup() {

  createCanvas(400, 400);

  frameRate(10);

  for (let i = 0; i < 5; i++) {

    let r = floor(random(20, 50));

    let x = random(r + 1, width - r - 1);

    let y = random(r + 1, height - r - 1);

    blobs[i] = new Blob(x, y, r);

  }

}

​

function draw() {

  background(0);

  loadPixels();

    getIntensitySum();

  threshold();

  updatePixels();

  for (let b of blobs) {

    b.update();

  }

}

​

function getIntensitySum() {

  for (let i = 0; i < width; i++) {

    for (let j = 0; j < height; j++) {

      for (let b of blobs) {

        let index = 4 * (i + j * width);

        let d = dist(i, j, b.pos.x, b.pos.y);

        let intensity = b.r / d * 100;

​

        pixels[index + 0] += intensity;

        pixels[index + 1] += intensity;

        pixels[index + 2] += intensity;

      }

    }

  }

}

​

function threshold() {

  for (let i = 0; i < width; i++) {

    for (let j = 0; j < height; j++) {

      let index = 4 * (i + j * width);

            if (pixels[index] < 200) {

        intensity = 0;

      } else {

        intensity = 255;

      }

      pixels[index + 0] = intensity / 255 * 100;

      pixels[index + 1] = intensity;

      pixels[index + 2] = intensity / 255 * 100;

    }

  }

}