rainbow()

CRGB fl::FlowFieldFP::rainbow ( s16x16 t, s16x16 speed, s16x16 phase )

staticprivate

Definition at line 549 of file flowfield.cpp.hpp.

                                                                           {
    constexpr s16x16 one(1.0f);
    constexpr s16x16 fp_255(255.0f);
    s16x16 hue_raw = t * speed + phase;
    // Positive modulo: hue in [0, 1)
    s16x16 hue = s16x16::mod(hue_raw, one);
    if (hue.raw() < 0)
        hue = hue + one;
    i32 hue_int = s16x16::clamp(hue * fp_255, s16x16(), fp_255).to_int();
    u8 hue_u8 = (u8)hue_int;
    CHSV hsv(hue_u8, 255, 255);
    CRGB rgb;
    hsv2rgb_rainbow(hsv, rgb);
    return rgb;
}

References fl::s16x16::clamp(), fl::FL_NO_EXCEPT, hsv2rgb_rainbow(), hue, fl::s16x16::mod(), fl::FlowField::speed(), fl::t, and fl::s16x16::to_int().

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