capsuleRadius constant

Sentinel radius that produces a perfect capsule (stadium) shape at any widget height.

Internally, interactive widgets such as GlassSegmentedControl and GlassTabBar detect this value via a >= capsuleRadius guard and pass it straight through to the glass shader without subtracting the indicator padding inset. This guarantees a true circular pill even during jelly-bloom expansion, where the physics canvas grows well beyond the widget’s at-rest height.

Use this constant instead of a raw 9999 literal:

GlassTabBar.bottom(
  barBorderRadius: GlassDefaults.capsuleRadius, // true capsule
)

Why 9999 and not double.infinity? The shader SDF receives the radius as a uniform float and guards against infinity, so a large-but-finite sentinel is the safe cross-platform choice.