update8()

u8 fl::TimeRamp::update8 ( u32 now )

overridevirtual

Compute current 0–255 output based on how much time has elapsed since trigger().

Implements fl::TimeAlpha.

Definition at line 83 of file time_alpha.cpp.

                            {
    if (!isActive(now)) {
        return 0;
    }
    // u32 elapsed = now - mStart;
    u8 out = 0;
    if (now < mFinishedRisingTime) {
        out = time_alpha8(now, mStart, mFinishedRisingTime);
    } else if (now < mFinishedPlateauTime) {
        // plateau
        out = 255;
    } else if (now < mFinishedFallingTime) {
        // ramp down
        u8 alpha =
            time_alpha8(now, mFinishedPlateauTime, mFinishedFallingTime);
        out = 255 - alpha;
    } else {
        // finished
        out = 0;
    }
 
    mLastValue = out;
    return out;
}

References isActive(), mFinishedFallingTime, mFinishedPlateauTime, mFinishedRisingTime, mLastValue, mStart, and fl::time_alpha8().

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