ellipticalArc
fun ellipticalArc(a: Vector2, b: Vector2, radius: Vector2, degrees: Double, largeArc: Boolean, sweep: Boolean): List<Vector2>
fun ellipticalArc(a: Vector2, b: Vector2, radius: Vector2, degrees: Double, largeArc: Boolean, sweep: Boolean, sides: Int?): List<Vector2>
Creates an elliptical arc from point a to point b whose radius is radius and whose x axis is rotated by degrees. See https://www.w3.org/TR/SVG11/paths.html#PathDataEllipticalArcCommands
The center of the circle is a calculated value.