render()

void mood_ring::FlowLayer::render	(	const RoomSense &	s,
		const MoodPalette &	pal,
		float	dtSec,
		RingCanvas &	c )

Definition at line 126 of file layers.cpp.

                                      {
    const float dtMs = dtSec * 1000.0f;
 
    // Mids set travel speed; a rising room speeds up, a settling one slows.
    const float speed = kFlowBaseTurnsPerSec +
                        kFlowMidTurnsPerSec * s.mid * (1.0f + 0.5f * s.trend);
    mPosA = advance(mPosA, speed, dtSec);
    mPosB = advance(mPosB, -speed * 0.8f, dtSec);
    mHueWalk = wrapTurns(mHueWalk + kFlowHueWalkPerSec * s.mid * dtSec);
 
    // Bass sets lobe size; trend widens on the way up and tightens on the
    // way down so a build feels like it is opening. Slewed so a bass drop
    // grows the lobe instead of snapping it.
    float sigmaTarget = kFlowSigmaMin + (kFlowSigmaMax - kFlowSigmaMin) * s.low;
    sigmaTarget *= 1.0f + 0.35f * s.trend;
    sigmaTarget =
        clampf(sigmaTarget, kFlowSigmaMin * 0.7f, kFlowSigmaMax * 1.4f);
    const float sigma =
        mSigma.update(sigmaTarget, dtMs, kFlowSigmaSlewMs, kFlowSigmaSlewMs);
 
    // Punch adds a brief brightness kick so a hit is visible without a beat.
    const float bodyTarget = 0.45f + 0.45f * s.energy + 0.4f * s.punch;
    const float body =
        mBody.update(bodyTarget, dtMs, kFlowBodyAttackMs, kFlowBodyReleaseMs);
 
    c.lobe(mPosA, sigma, paletteColor(pal, mHueWalk), body);
    c.lobe(mPosB, sigma * 0.8f, paletteColor(pal, wrapTurns(mHueWalk + 0.5f)),
           body * 0.8f);
 
    // A dim bed so the ring is never black between lobes.
    c.fill(paletteColor(pal, 0.5f), 0.06f + 0.10f * s.energy);
 
    spawnGrains(s, dtSec, c.size());
    drawGrains(pal, dtSec, c);
}

References mood_ring::clampf(), drawGrains(), mood_ring::RoomSense::energy, mood_ring::RingCanvas::fill(), mood_ring::RingCanvas::lobe(), mood_ring::RoomSense::low, mBody, mHueWalk, mood_ring::RoomSense::mid, mPosA, mPosB, mSigma, mood_ring::paletteColor(), mood_ring::RoomSense::punch, mood_ring::RingCanvas::size(), spawnGrains(), speed, mood_ring::RoomSense::trend, and mood_ring::wrapTurns().

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