OptionalangularOptionaldirectionOrbit direction.
OptionalphaseInitial angle in degrees. Only used when ParticleGeneratorOrbitOptions#radius is provided.
OptionalradialRadial speed in pixels per second.
OptionalradiusOrbit radius in pixels. If null, use the particle's initial distance from the anchor.
OptionalrotationIf set, override sprite rotation each frame.
Angular speed in degrees per second.