Noisy Ball

class Ball {

  float y, x, xs, ys, wdth, ht;

  float sz;

  float cnt = 0;

  float nsx = 0.01;

  float nsy = -0.7;

  Ball(float y, float x, float xs, float ys, float wdth, float ht) {

    this.y = y;

    this.x = x;

    this.xs = xs;

    this.ys = ys;

  }

  void update() {

​

    xs = constrain(xs+map(noise(nsx), 0.0, 1.0, -1.0, 1.0), -30, 30);

    ys = constrain(ys+map(noise(nsy), 0.0, 1.0, -1.0, 1.0), -30, 30);

    x = constrain(x + xs, -1, width+1);

    y = constrain(y + ys, -1, height+1);

    if (x+wdth/2 > width || x < wdth/2) {

      xs *= -1;

    }

    if (y+ht/2 > height || y < ht/2) {

      ys *= -1;

    }

    nsx += 0.02;

    nsy += 0.02;

  }

  void display() {

    if (cnt%6 == 1) {

      fill(255, 10);

      rect(0, 0, width, height);

    }

    fill(0);

    noStroke();

    sz = map(abs(xs)+abs(ys), 0, 60, 2, 8);

    ellipse(x, y, sz, sz);

    cnt +=1;

  }

}

​

​