A ring is a circular band with an open center. It is useful for emphasizing a circular boundary while leaving the middle clear, as in a progress indicator, target, or orbit.
`radius` measures the distance to the band's midline from 0 to 1. `thickness` is half the band width from 0.005 to 0.3, so the full band is twice that value. `softness` softens both inner and outer edges from 0 to 0.1, and `strokeThickness` ranges from 0 to 0.1.
`thickness` is the half-width rather than the full width, so account for both sides when judging the band. Layer a `Circle` inside it for an outlined disk, or use several rings for progress or concentric-circle graphics.
When to use
Use it for circular emphasis with an open center, such as a progress indicator, target, or orbit accent. It also works for repeating ring backgrounds. Use Circle when the center needs to be filled.