trapezoid()

std::vector< double > MayaFlux::Kinesis::Discrete::trapezoid	(	size_t	n,
		size_t	fade_len
	)

Trapezoid taper coefficients with configurable flat region.

Linear ramp-in over fade_len samples, unity plateau, linear ramp-out over fade_len samples. If 2 * fade_len >= n the ramps are clamped so they meet at the centre with no plateau.

Parameters

n	Length in samples
fade_len	Ramp length in samples at each end

Returns

Coefficient vector of length n

Definition at line 55 of file Taper.cpp.

{
    if (n == 0)
        return {};
    if (n == 1)
        return { 1.0 };
    std::vector<double> w(n, 1.0);
    const size_t ramp = std::min(fade_len, n / 2);
    for (size_t i = 0; i < ramp; ++i) {
        const double r = static_cast<double>(i) / static_cast<double>(ramp);
        w[i] = r;
        w[n - 1 - i] = r;
    }
    return w;
}