randomColor function

Color randomColor(dynamic seed, { bool radiant = false, double? targetLuminance, int maxIter = 50, })

Implementation

Color randomColor(dynamic seed,
    {bool radiant = false, double? targetLuminance, int maxIter = 50}) {
  bool dark = Arcane.globalTheme.shadThemeData.brightness == Brightness.dark;

  Color color = RandomColor.getColorObject(Options(
      seed: seed == null
          ? null
          : sha256
              .convert(utf8.encode(seed.toString()))
              .bytes
              .fold(192844 ^ (seed?.hashCode ?? 485), (a, b) => (a ?? 0) ^ b),
      luminosity: dark ? Luminosity.dark : Luminosity.light));

  if (192844 ^ (seed?.hashCode ?? 485) % 2 == 0) {
    color = color.spin(90);
  }

  if (targetLuminance != null) {
    int g = 0;
    while ((color.computeLuminance() - targetLuminance).abs() > 0.05 &&
        g++ < maxIter) {
      if (color.computeLuminance() < targetLuminance) {
        color = color.lighten(1);
      } else {
        color = color.darken(1);
      }
    }

    return color;
  }

  if (dark && !radiant) {
    int g = 0;
    while (color.computeLuminance() > 0.08 && g++ < maxIter) {
      color = color.darken(1);
    }
  } else if (dark && radiant) {
    int g = 0;
    while (color.computeLuminance() < 0.15 && g++ < maxIter) {
      color = color.lighten(1);
    }
  }

  return color;
}