hsvToRgb function

List<num> hsvToRgb(num h, num s, num v)

Implementation

List<num> hsvToRgb(num h, num s, num v) {
  int r = 0, g = 0, b = 0;

  int i = (h * 6).floor();
  int f = h * 6 - i as int;
  int p = v * (1 - s) as int;
  int q = v * (1 - f * s) as int;
  int t = v * (1 - (1 - f) * s) as int;

  switch (i % 6) {
    case 0:
      r = v as int;
      g = t;
      b = p;
      break;
    case 1:
      r = q;
      g = v as int;
      b = p;
      break;
    case 2:
      r = p;
      g = v as int;
      b = t;
      break;
    case 3:
      r = p;
      g = q;
      b = v as int;
      break;
    case 4:
      r = t;
      g = p;
      b = v as int;
      break;
    case 5:
      r = v as int;
      g = p;
      b = q;
      break;
  }

  return [r * 255, g * 255, b * 255];
}