private void drawObstacleCircle(Obstacle o, Graphics2D g)
{
    final double OBSTACLE_CENTER_RADIUS = 2.0;
    final double OBSTACLE_RADIUS = o.getRadius(true);

    float scaleToUse = Math.max(0.8f, scale);

    Vector pos = o.getPosition();

    int xPos = (int) (pos.getX() * getBufferedHeightMap().getWidth());
    int yPos = (int) (pos.getY() * getBufferedHeightMap().getHeight());

    Point positionPoint = convertToPanelPoint(new Point(xPos, yPos));

    // Draw the circle where the Obstacle's center is
    Graphics2D g1 = (Graphics2D) g.create();

    g1.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
    g1.setColor(Color.RED);
    g1.fillOval(positionPoint.x - (int) (OBSTACLE_CENTER_RADIUS * scaleToUse), positionPoint.y - (int) (OBSTACLE_CENTER_RADIUS * scaleToUse), (int) (OBSTACLE_CENTER_RADIUS * 2 * scaleToUse), (int) (OBSTACLE_CENTER_RADIUS * 2 * scaleToUse));

    Color c = Color.RED;
    g1.setColor(new Color(c.getRed(), c.getGreen(), c.getBlue(), 100));
    g1.fillOval(positionPoint.x - (int) (OBSTACLE_RADIUS * scaleToUse), positionPoint.y - (int) (OBSTACLE_RADIUS * scaleToUse), (int) (OBSTACLE_RADIUS * 2 * scaleToUse), (int) (OBSTACLE_RADIUS * 2 * scaleToUse));

    g1.dispose();
    g2.dispose();
}