constructor(x, y) {

    this.x = x;

    this.y = y;

    this.radius = 1;

    this.growing = true;

    currentAmount++;

    if (this.hitsCentre()) this.stopGrowing();

  }

​

  hitsCentre() {

    let distance = dist(this.x, this.y, width/2, height/2);

    if (distance < towerVisionSize*1.5) return true;

  }

  update() {

    if (!this.growing) return;

    if (currentAmount == towerTargetAmount) return;

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

      if (circles[i] == this) continue;

​

      if (this.overlap(circles[i])) {

        this.x = (this.x+circles[i].x)/2;

        this.y = (this.y+circles[i].y)/2;

        circles[i].stopGrowing();

        break;

      }

    }

    this.radius += growRate;

  }

​

  overlap(otherCircle) {

    if (!otherCircle.growing) return;

    let distance = dist(this.x, this.y, otherCircle.x, otherCircle.y);

    let radii = this.radius + otherCircle.radius;

​

    if (distance < radii) return true;

  }

​

  stopGrowing() {

    this.growing = false;

    currentAmount--;

  }

}

​