Function hsv2rgb_fullspectrum

src/hsv2rgb.cpp.hpp:495–511

}

void hsv2rgb_fullspectrum( const CHSV& hsv, CRGB& rgb) {
  const auto f = [](const int n, const fl::u8 h) -> fl::u32 {
    constexpr int kZero = 0 << 8;
    constexpr int kOne  = 1 << 8;
    constexpr int kFour = 4 << 8;
    constexpr int kSix  = 6 << 8;

    const int k = ((n << 8) + 6*h) % kSix;
    const int k2 = kFour - k;
    return fl::max(kZero, fl::min(kOne, fl::min(k, k2)));
  };

  const fl::u32 chroma = hsv.v * hsv.s / 255;
  rgb.r = hsv.v - ((chroma * f(5, hsv.h)) >> 8);
  rgb.g = hsv.v - ((chroma * f(3, hsv.h)) >> 8);
  rgb.b = hsv.v - ((chroma * f(1, hsv.h)) >> 8);
}

/// Inline version of hsv2rgb_fullspectrum which returns a CRGB object.
CRGB hsv2rgb_fullspectrum( const CHSV& hsv) {