Initialize circle layout inside simulation area

__initCircles

protected __initCircles(): void
{
  // Draw the point
  this.__drawPoint();

  // Draw the circles at pseudo-random locations around the drawing area
  const xHigh: number = (this._width - CircleService.MAX_RADIUS) + 0.499;
  const yHigh: number = (this._height - CircleService.MAX_RADIUS) + 0.499;

  let i: number;
  let x: number;
  let y: number;
  let r: number;
  let g: PIXI.Graphics;
  let c: TSMT$Circle;

  for (i = 0; i < CircleService.NUM_CIRCLES; ++i)
  {
    x = RandomIntInRange.generateInRange(CircleService.MAX_RADIUS, xHigh);
    y = RandomIntInRange.generateInRange(CircleService.MAX_RADIUS, yHigh);
    r = RandomIntInRange.generateInRange(CircleService.MIN_RADIUS, CircleService.MAX_RADIUS);
    g = new PIXI.Graphics();
    c = new TSMT$Circle();

    c.x      = x;
    c.y      = y;
    c.radius = r;
    c.id     = i.toString();   // id needs to double as the index into the master array of circle references

    // update quadrant(s) for the circle; this requires bounds to be set
    c.setBounds(0, 0, this._width, this._height);

    // the keys are what matter here ...
    if (c.inQuadrant(1)) {
      this._quad1[c.id] = true;
    }

    if (c.inQuadrant(2)) {
      this._quad2[c.id] = true;
    }

    if (c.inQuadrant(3)) {
      this._quad3[c.id] = true;
    }

    if (c.inQuadrant(4)) {
      this._quad4[c.id] = true;
    }

    this._circleRefs.push(c);
    this._circleDO.push(g);
    this._circles.addChild(g);

    g.lineStyle(this.strokeWidth, this.strokeColor);
    g.drawCircle(x, y, r);
  }
}