paletteFor()

MoodPalette mood_ring::paletteFor	(	const RoomSense &	s,
		float	hueDrift )

Derive the family for this frame. Cheap; call every frame.

Definition at line 21 of file mood_palette.cpp.

                                                           {
    MoodPalette p;
    // Travel the short way round the wheel from cool to warm (through
    // magenta/red), which is the emotionally right path: sad -> tense ->
    // happy, not sad -> green -> happy.
    const float w = clampf(s.warmth, 0.0f, 1.0f);
    float hue = kCoolHue + (kWarmHue + 256.0f - kCoolHue) * w;
    hue += hueDrift * 256.0f;
    while (hue >= 256.0f)
        hue -= 256.0f;
    while (hue < 0.0f)
        hue += 256.0f;
    p.hueBase = static_cast<fl::u8>(hue);
 
    const float a = clampf(s.arousal, 0.0f, 1.0f);
    p.hueSpread =
        static_cast<fl::u8>(kMinSpread + (kMaxSpread - kMinSpread) * a);
    p.saturation = static_cast<fl::u8>(kMinSat + (kMaxSat - kMinSat) * a);
    return p;
}

References mood_ring::RoomSense::arousal, clampf(), hue, mood_ring::MoodPalette::hueBase, mood_ring::MoodPalette::hueSpread, mood_ring::MoodPalette::saturation, and mood_ring::RoomSense::warmth.

Referenced by mood_ring::MoodPainter::draw().

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