pub const BEZIER_CIRCLE: f64 = 0.552_284_75;Expand description
Control-point ratio for approximating a quarter-circle with a cubic Bézier.
Derivation: 4 * (√2 − 1) / 3 ≈ 0.552_284_75. Four cubic Bézier segments
with this control-point ratio approximate a unit circle with a maximum
radial error below 0.03 %.
Unit: dimensionless ratio (fraction of the radius).