A pie sector is bounded by part of a circle and two edges that meet at its center. Use it to show an angular segment, like a pie-chart slice or a radial highlight.
`radius` sets the sector radius from 0 to 1. `aperture` is the opening angle from 0 to 360 degrees, with 360 making a full circle. Turn the opening with `rotation` from 0 to 360 degrees, and soften its boundary with `softness` from 0 to 0.1.
This shape is a filled wedge reaching the center, not a thin curved arc. For a narrow circular band, use a thin `Ring` or compose separate line shapes, and check layer order when it overlaps a `Circle`.
When to use
Use it for pie-chart slices, radial progress segments, or angular highlights. It creates an open-ended color block that reaches the center. Avoid it when you only need a thin curved line with an empty center.