/** @param point */
  public void calculateDistanceToStart(final Coord point) {
    if (Double.isInfinite(mFlyingPos.x()) || Double.isInfinite(mFlyingPos.y())) {
      throw new IllegalArgumentException(
          "FlyingBall: calculateDistanceToPoint is not possible, before setting the flying Position.");
    }

    final double x2 = Math.pow(Math.abs(point.x() - mFlyingPos.x()), 2);
    final double y2 = Math.pow(Math.abs(point.y() - mFlyingPos.y()), 2);
    mDistance = Math.sqrt(x2 + y2);
  }
  @Override
  public String toString() {
    StringBuffer str = new StringBuffer();
    str.append("###Flying Ball###\n");
    str.append("bottomPosX:    " + mBottomPos.x() + "\n");
    str.append("bottomPosY:    " + mBottomPos.y() + "\n");
    str.append("flyingPosX:    " + mFlyingPos.x() + "\n");
    str.append("flyingPosY:    " + mFlyingPos.y() + "\n");
    str.append("flyingHeight:  " + mFlyingHeight + "\n");

    return str.toString();
  }
  /**
   * @param aFlyPosition
   * @param camId
   */
  public void setFlyPositionAndCalculateFlyingHeight(final Coord aFlyPosition, final int camId) {
    mFlyingPos = aFlyPosition;
    final double bfX = Math.abs(mFlyingPos.x() - mBottomPos.x());
    final double bfY = Math.abs(mFlyingPos.y() - mBottomPos.y());
    final double bf = Math.sqrt((bfX * bfX) + (bfY * bfY));

    Cam cam = Def.cams.get(camId);
    final double cfX = Math.abs(mFlyingPos.x() - cam.x);
    final double cfY = Math.abs(mFlyingPos.y() - cam.y);

    final double cf = Math.sqrt((cfX * cfX) + (cfY * cfY));

    mFlyingHeight = (Def.camHeight * bf) / (bf + cf);
  }
 /** @return */
 public double getFlyingPositionY() {
   return mFlyingPos.y();
 }
 /** @return */
 public double getBottomPositionY() {
   return mBottomPos.y();
 }