Find point on ellipse

PointOnEllipse.java

protected Point2D pointOnEllipse(double angle, Point2D center, double width, double height) {
    width = width / 2d;
    height = height / 2d;

    angle = Math.toRadians(angle);

    double t = Math.atan(width * Math.tan(angle) / height);
    return new Point2D.Double(center.getX() + width * Math.cos(t), center.getY() + height * Math.sin(t));
}

protected Point2D pointOnEllipse(double angle, double width, double height) {
    width = width / 2d;
    height = height / 2d;

    angle = Math.toRadians(angle);

    double t = Math.atan(width * Math.tan(angle) / height);
    return new Point2D.Double(width * Math.cos(t), height * Math.sin(t));
}

Because it's one of things I'll do once in a while and never remember