drawPulses()

void mood_ring::MoodPainter::drawPulses ( const MoodPalette & pal, fl::u32 nowMs )

private

Definition at line 171 of file mood_painter.cpp.

                                                                {
    RingCanvas c(mMix);
    const float origin = wrapTurns(tuning.pulseOrigin);
    for (int i = 0; i < kMaxPulses; ++i) {
        Pulse &p = mPulses[i];
        if (!p.active)
            continue;
        const fl::u32 elapsed = nowMs - p.startMs;
        if (elapsed >= kPulseLifetimeMs) {
            p.active = false;
            continue;
        }
        const float life =
            static_cast<float>(elapsed) / static_cast<float>(kPulseLifetimeMs);
        const float radius = life * 0.5f; // origin to the far side
        const float sigma = p.downbeat ? kPulseSigmaDownbeat : kPulseSigmaBeat;
        // Fade in over the first few percent so the ring grows out of the
        // origin rather than appearing there, then dissolve as it travels.
        const float amp =
            p.strength * smoothstepf(0.0f, kPulseFadeIn, life) * (1.0f - life);
        // Downbeats take the warm end of the family; beats stay white so the
        // bar boundary is distinguishable by colour as well as by width.
        const RGBf tint = p.downbeat ? paletteColor(pal, 1.0f) : rgbfWhite();
        c.ring(origin, radius, sigma, tint, amp);
    }
}

References mood_ring::MoodPainter::Pulse::active, mood_ring::MoodPainter::Pulse::downbeat, kMaxPulses, mMix, mPulses, mood_ring::paletteColor(), mood_ring::rgbfWhite(), mood_ring::RingCanvas::ring(), mood_ring::smoothstepf(), mood_ring::MoodPainter::Pulse::startMs, mood_ring::MoodPainter::Pulse::strength, tuning, and mood_ring::wrapTurns().

Referenced by draw().

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