INNER CODE UNIT · Dart
notchRadius
LanarsInc/animated-bottom-navigation-bar-flutter · lib/src/circular_notched_and_cornered_shape.dart:86
double notchRadius = guest.width / 2 * (animation?.value ?? 1);
double leftCornerRadius = this.leftCornerRadius * (animation?.value ?? 1);
double rightCornerRadius = this.rightCornerRadius * (animation?.value ?? 1);
// We build a path for the notch from 3 segments:
// Segment A - a Bezier curve from the host's top edge to segment B.
// Segment B - an arc with radius notchRadius.
// Segment C - a Bezier curve from segment B back to the host's top edge.
//
// A detailed explanation and the derivation of the formulas below is
// available at: https://goo.gl/Ufzrqn
final double s1 = notchSmoothness.s1;
final double s2 = notchSmoothness.s2;
double r = notchRadius;
double a = -1.0 * r - s2;
double b = host.top - guest.center.dy;